CN101244852B - Ultraviolet radiation water treatment system - Google Patents

Abstract

A water treatment system for water purification treatment using ultraviolet radiation, the system comprising: a pre-ultraviolet radiation device (5) for emitting ultraviolet light in the early stage of the water purification process, and a post-ultraviolet radiation device (5) for emitting ultraviolet light in the later process device (10), and a controller (14) for controlling these ultraviolet radiation devices.

Description

Ultraviolet radiation water treatment system

The application is that the applicant submitted on March 29th, 2006, and application number is " 200610071878.X ", and denomination of invention is divided an application for the application for a patent for invention of " ultraviolet radiation water treatment system ".

Background of invention

The present invention relates to carry out the ultraviolet radiation water treatment system of water purifying treatment with ultraviolet radiation.

Habitually, sterilization guarantees that the water system that health is operated represented water treatment system according to chlorine.

Yet taken place in recent years, by occurring or the pathogenic micro-organism of appearance again such as the water system pollution incident that Cryptosporidium, giardia (giargia) etc. cause.

And, because the eutrophication at water system water sources such as lake, dam and river, and pollution such as organism increases the algal bloom that causes, cause off-odour and taste, color exception, gathering and deposition suppress, filter block, the filtered water of bleeding and other problem.

And, organism reaction that water is used for germ-resistant chloro-containing reagent and former water occurred injecting and produced harmful side product such as haloform (this is a general name of representing the total amount of chloroform, bromofom, bromodichloromethane and dichloro methyl chloride.) problem.

These problems have reached the existing uncontrollable level of water treatment system in this area that the base conditioning method comprises gathering and deposition, filtration and chlorine treatment.

Under this environment, sterilization (sterilization) technology by treatment with uv radiation (below be also referred to as disinfection by ultraviolet light) has attracted a lot of concerns as the germ-resistant alternative sterilization technology of conventional chlorine.Disinfection by ultraviolet light has the advantage that does not need complicated chemical agent implantation step and do not produce harmful side product.Therefore, in water treatment device etc., be used for adopting treatment with uv radiation under sterilization and the remaining organic situation of oxidation at some.Yet, from the viewpoint of the efficiency of transmission of UV-light, usually the processing of carrying out be with ultraviolet radiation in filtered water or gathering or connate water.

On the other hand, in some cases, ultraviolet radiation is applied to former water, to improve the infection of assembling, eliminating pathogenic micro-organism such as Cryptosporidium etc.This is to substitute chlorine with UV-light former water is carried out germ-resistant processing.As mentioned above, unlike chlorine treatment, this processing does not produce by product such as haloform, even ultraviolet radiation.And UV-light has been damaged the reproductivity of Cryptosporidium very effectively and has been eliminated its infectivity.Therefore, adopt treatment with uv radiation.

In the water purifying treatment, preferably prevent to be included in the breeding of algae in the former water, confirmed that treatment with uv radiation also prevents the breeding of algae effectively.

Simultaneously, the radiation efficiency of UV-light changes with the turbidity and the colourity of pending water.Especially, be difficult to control the water quality of former water.Therefore, be difficult to suitably keep radiation efficiency in treatment with uv radiation, this is a problem of the prior art.

In order to address this problem, someone proposes by detecting the turbidity of former water, and control the flow velocity that former water flows through the water pipe that ultraviolet lamp is housed according to the turbidity that is detected, realize the technology (referring to for example, Japanese Patent Application Laid-Open publication No. 5-169059) of suitable ultraviolet radiation control.In this file, propose the water planktonic organism in the retention basin etc. to be killed the algae processing with ultraviolet radiation.

And, also propose to replace turbidometer to realize that the technology of suitable ultraviolet radiation control is (referring to for example with hondrometer, Shigeo Kimura etc., " research that the fundamental property of particle measurer is estimated " (Investigation onBasic Performance Evaluation of Particle Measuring Devices), Water SystemAssociation Magazine, the 71st volume, the 10th phase, the 31-51 page or leaf, in October, 2002).And, proposed to use ultraviolet radiation has been controlled the ultraviolet radiation system (referring to for example Japanese Patent Application Laid-Open notification number 2004-188273) that ultraviolet lamp is exported to turbidometer and hondrometer in the system of the former water of water purification apparatus.

The problem that exists in ultraviolet radiation system described in the above-mentioned prior art file and treatment with uv radiation method is as follows.

Usually, only by assemble and the former water of depositing treatment after with ultraviolet radiation in treating water, can not deal with the algae that in assembling and depositing, causes problem.Therefore, in order to tackle algae effectively with ultraviolet radiation, need assemble handle before with ultraviolet radiation in former water.

Yet raw water quality is very big with the changes such as fluctuation of water source, meteorologic phenomena.Say that more specifically the turbidity of former water, microbe population and organic concentration are very big with a large amount of breedings and the precipitation change of algae, under normal conditions, with the rising ultraviolet transmittance reduction of these values.The result is, can not fully obtain the effect of ultraviolet radiation, be not only and deal with algae, and effect such as the sterilization of pathogenic agent (sterilization) processing all reduces, and this is another problem of prior art.

Summary of the invention

According to a first aspect of the invention, provide the water treatment system of carrying out the water purifying treatment with ultraviolet radiation, this system comprises:

First ultraviolet radiation device, its process emission in early stage as the water decontamination process in former water coagulation/sedimentation treating processes is ultraviolet;

Second ultraviolet radiation device, it in the later stage of water decontamination process process with the water in the treatment with uv radiation early stage process; With

Control the controller of first and second ultraviolet radiation device.

Other advantage of the present invention is seen following specification sheets, can obviously find out the part advantage from specification sheets, or can learn these advantages by implementing the present invention.Mode with following instrument of specifically noting and combination can realize and obtain advantage of the present invention.

The accompanying drawing summary

Include specification sheets in and constitute a specification sheets part description of drawings embodiment of the present invention, accompanying drawing describes in detail with the leader that provides above and embodiment given below, explains the principle of the invention.

Fig. 1 is the block diagram that shows the water treatment system major portion of first embodiment of the present invention;

Fig. 2 is the block diagram that shows the water treatment system major portion of second embodiment of the present invention;

Fig. 3 shows the graph of a relation between the turbidity and ultraviolet transmittance in second embodiment of the present invention;

Fig. 4 shows the graph of a relation between the fluorescence intensity and ultraviolet absorbance in second embodiment;

Fig. 5 is the graph of a relation that shows between the carbon concentration of fluorescence intensity and dissolved organic matter in second embodiment;

Fig. 6 is the block diagram that shows the water treatment system major portion of the 3rd embodiment of the present invention;

Fig. 7 be show the 3rd embodiment early stage ultraviolet radiation device the figure of internal structure;

Fig. 8 is the synoptic diagram that shows the water treatment system of the 4th embodiment of the present invention and use the water correction plant of this water treatment system;

Fig. 9 shows the block diagram that is assemblied in the schematic structure of the Monitoring and Controlling unit 62 in the water treatment system in the 4th embodiment;

Figure 10 has shown and has injected in the 4th embodiment and the record content of radiation master mode table 71.

Figure 11 is the figure that shows the display screen 83 of display unit 72 in the 4th embodiment;

Figure 12 injects water treatment system mid-early stage of showing the 4th embodiment and the block diagram of the schematic structure of radiation control unit;

Figure 13 A shows the graph of a relation between the turbidity and clorox in the water treatment system of the 4th embodiment;

Figure 13 B shows the graph of a relation between the turbidity and ultraviolet ray injection and radiation quantity in the water treatment system of the 4th embodiment; With

Figure 13 C shows the graph of a relation between the UV lamp quantity and appointment radiation quantity in the water treatment system of the 4th embodiment.

Detailed Description Of The Invention

Hereinafter with reference to accompanying drawing embodiment of the present invention is described in detail.

＜first embodiment 〉

Fig. 1 is the block diagram that shows the water treatment system major portion of first embodiment of the present invention.

This system has by hydraulic pipe guiding former water by the sedimentation basin 2 of inlet pumping (not shown) to the former water of sedimentation basin 1 and 1 supply of temporarily stored sedimentation basin.Millpond 2 is regulated the former water yield of supplying with water treatment procedure.

This system also has coagulation/settling bowl 3, and the former water of supplying with guiding pond 2 passes through the treating processes in early stage.In the early stage treating processes, raw water flow meter 4 and first ultraviolet radiation device (below be also referred to as the ultraviolet radiation device in early stage) 5 is arranged in the pipeline that is used for the former water in pond 2 is offered coagulation/settling bowl 3.Also arranged bypass pipe 6, be used for former water get the path of detouring leave the early stage ultraviolet radiation device 5.

7a is connected in the inlet side of ultraviolet radiation device 5 in earlier stage with bypass pipe 6 by the inlet T-valve, bypass pipe 6 is connected in its outlet side by outlet T-valve 7b.Inlet T-valve 7a and outlet T-valve 7b are respectively the valves that changes former water route.On pipe path, with the water supply coagulation/settling bowl 3 of ultraviolet radiation device 5 ultraviolet radiations premenstruum.

In coagulation/settling bowl 3, inject aggregating agent prepared therefrom, in high-speed stirring, stirring at low speed and sedimentary step, remove the turbidity substance in the former water.More specifically say, fine sand and dust and the colloidal organic matter formation floss of getting together, deposition is also removed turbidity substance.At this, by early stage ultraviolet radiation device 5 carry out after the ultraviolet radiation part algae dead or still survival and pathogenic micro-organism and also be absorbed in the floss and remove.

And, in this system, in the post-processed process, sedimentation water ga(u)ge 9 and second ultraviolet radiation device (below be also referred to as the later stage ultraviolet radiation device) 10 is arranged in the pipeline that is used for the treating water of coagulation/settling bowl 3 is offered filtering basin 8.In addition, also arranged bypass pipe 11, be used for treating water and get the path of detouring and leave later stage ultraviolet radiation device 10.

By inlet T-valve 12a bypass pipe 11 is connected in the inlet side of later stage ultraviolet radiation device 10, bypass pipe 11 is connected in its outlet side by outlet T-valve 12b.Inlet T-valve 12a and outlet T-valve 12b are respectively the valves that changes former water route.On pipe path, the treating water of ultraviolet radiation device 5 ultraviolet radiations is supplied with filtering basin 8 with premenstruum.

On each inboard of early stage ultraviolet radiation device 5 and later stage ultraviolet radiation device 10, a plurality of ultraviolet ultraviolet lamps that are used to launch have been arranged., for each ultraviolet lamp power supply it is lighted by ultraviolet lamp power supply 13a, 13b.

By control signal wire the water purifying treatment monitor controller (hereinafter referred to as controller) 14 of this system is connected in ultraviolet lamp power supply 13a, 13b, controls the output of each ultraviolet lamp power supply 13a, 13b.Thereby adjust the electric weight of each ultraviolet lamp of supplying with ultraviolet radiation device 5,10.

With the observed value of former water flow velocity with by sedimentation water ga(u)ge 9 observed value of sedimentation water flow velocity is imported controller 14 by the raw water flow meter.Simultaneously, the sedimentation water ultraviolet transmittance input controller 14 of former water ultraviolet transmittance that former water ultraviolet (uv) transmission meter 16 is measured and 18 measurements of sedimentation water ultraviolet (uv) transmission meter.

Former water ultraviolet (uv) transmission meter 16 is connected in former water sampling tube 15, measures the ultraviolet transmittance of the former water sample of in the connecting tube of pond 2 and ultraviolet radiation device 5 in early stage, obtaining by former water sampling tube 15.On the other hand, sedimentation water ultraviolet (uv) transmission meter 18 is connected in sedimentation water sampling tube 17, measures the ultraviolet transmittance of the sedimentation water sample of in the connecting tube of coagulation/settling bowl 3 and later stage ultraviolet radiation device 10, obtaining by sedimentation water sampling tube 17.

And, the ultraviolet luxmeter 19,20 of experiencing inner arbitrfary point illumination is arranged in ultraviolet radiation device 5 and later stage ultraviolet radiation device 10 in earlier stage respectively.Observed value input controller 14 with these ultraviolet luxmeters 19,20.

(operation of first embodiment and effect)

Below will explain the operation and the effect of present embodiment.

Controller 14 has calculated ultraviolet radiation device 5 and the inner separately ultraviolet illumination of later stage ultraviolet radiation device 10 in earlier stage in order to following equation (1).Here, ultraviolet illumination is the maximum value on ultraviolet lamp surface, along with reducing gradually away from ultraviolet lamp.With calculating reduction amount at this moment to the ultraviolet transmittance of the pending liquid of mobile in pipeline (former water or sedimentation water) with apart from the distance on ultraviolet lamp surface:

$I=\left(\frac{U_v}{4\mathrm{\&pi;}{\mathrm{<figure-callout\; id="0"\; label="Z"\; filenames="S2008100879719E00032.png,S2008100879719E00041.png"\; state="\{\{state\}\}">Z</figure-callout>}}_0^2}\right)\&times;\exp (\ln (T/100)\&times;Z)(\mathrm{mW}/c{m}^2)\&CenterDot;\&CenterDot;\&CenterDot;\left(1\right)$

I refers to ultraviolet illumination (mW/cm in the formula ²); Uv refers to the ultraviolet ray output (mW) of ultraviolet lamp; T refers to ultraviolet transmittance (%); Z ₀The distance of span ultraviolet lamp (cm); Z refers to that ultraviolet ray penetrates the distance of former water or treating water (cm).

Simultaneously, will be from the observed value input controller 14 of the ultraviolet transmittance of former water ultraviolet (uv) transmission meter 16 and sedimentation water ultraviolet (uv) transmission meter 18.

Based on the ultraviolet ray amount of illumination and time measure with early stage ultraviolet radiation device 5 and later stage ultraviolet radiation device 10 ultraviolet radiation kill that algae is handled and the performance of sterilization (sterilization), wherein illumination is included in the illumination of mobile treating water acceptance in microorganism in the former water or the pipeline.Usually, determine the ultraviolet ray amount by following equation (2):

Dosage=I * t (mJ/cm ²) (2)

Dosage refers to ultraviolet ray amount (mJ/cm in the formula ²); I refers to ultraviolet illumination (mW/cm ²); T refers to radiated time (second).

Also have, kill pending microorganism or make its inactivation (destroy its reproductivity, or destroy the infectivity of pathogenic micro-organism) common kind of necessary ultraviolet ray amount different because of microorganism.Therefore, need consider the performance of ultraviolet radiation device 5,10 according to pending microbe species.

(control ultraviolet radiation device 5 in early stage)

In the present embodiment, with early stage ultraviolet radiation device 5 be arranged in early stage of coagulation/settling bowl 3.Therefore, not only effectively tackle the pathogeny microorganism that survives in the former water, also can effectively tackle algae.Therefore, controller 14 has been controlled the ultraviolet lamp output of ultraviolet radiation device 5 in early stage, to obtain to make the necessary ultraviolet ray amount of multiple pathogenic micro-organism and algae death and inactivation.

Controller 14 is controlled the ultraviolet lamp output of ultraviolet radiation device 5 in earlier stage according to the observed value of former water ultraviolet (uv) transmission meter 16, observed value, the arrangement of ultraviolet radiation device 5 medium ultraviolet lamps in earlier stage and the mobile condition of former water that changes with internal structure and flow velocity of raw water flow meter 4 with arithmetic equation such as above-mentioned arithmetic equation (1)-(2).Say that more specifically controller 14 changes with the essential ultraviolet output valve of arithmetic equation calculating according to ultraviolet transmittance and flow velocity.Thereby this controller has been controlled the electric power of supplying with the ultraviolet lamp the ultraviolet radiation device 5 in early stage from ultraviolet lamp power supply 13a.

And, when controller 14 determines that according to the observed value of former water ultraviolet (uv) transmission meter 16 ultraviolet transmittance of former water compares with reference value when enough high, this controller control reduces the ultraviolet lamp output of later stage ultraviolet radiation device 10, to reduce limits value or shut-down operation.

That is, when the ultraviolet transmittance of former water is very high, even only with early stage ultraviolet radiation device 5 just may obtain enough algae processing and sterilization (sterilization) performances of killing.Therefore, by reducing the performance of later stage ultraviolet radiation device 10, possible conservation of power consumption.In this case, the viewpoint from the feature of ultraviolet lamp needs ultraviolet lamp to be lighted with the constant waiting time, stably carries out ultraviolet ray output.For this reason, preferably reducing output function is the operation that stops later stage ultraviolet radiation device 10.

On the other hand, ultraviolet transmittance is subjected to former water float material, turbidity substance and the organic influence of dissolved.For this reason, when raw water turbidity was increased, ultraviolet transmittance reduced greatly.In this case, controller 14 is controlled ultraviolet radiation device 5 shut-down operations in early stage, or ultraviolet lamp output is reduced to lower limits value.This is because when ultraviolet transmittance reduced greatly, the greatest irradiation of i.e. use ultraviolet radiation device 5 in early stage can not obtain required ultraviolet ray amount in some cases, has wasted the electric power of supplying with ultraviolet radiation device 5 in early stage probably.

In this case, controller 14 is by operation three-way valve 7a, 7b control break flow path (flow route), and it is dirty because floating substance and turbidity substance and organism adhere to prevent internal pipeline that former water is flowed in bypass pipe 6.Also have, controller 14 is brought up to the output of later stage ultraviolet radiation device 10 more than the standard value, the loss of compensation sterilization (sterilization) performance in the early stage process.

(control later stage ultraviolet radiation device 10)

To explain the method for the radiation quantity of control later stage ultraviolet radiation device 10 below.

Later stage ultraviolet radiation device 10 is arranged in later stage of coagulation/settling bowl 3, ultraviolet radiation is gone in the sedimentation water as treating water.Part floating substance and turbidity substance in the former water, and algae and pathogenic micro-organism all be absorbed in the floss are deposited and as sludge removal.Yet the coagulation/settling process of carrying out in 3 can not be removed dissolved organism in the water.Therefore, they are left over as the ultraviolet radiation absorption factor in the later stage ultraviolet radiation device 10.

The output of controller 14 control later stage ultraviolet radiation devices 10 medium ultraviolet lamps is with multiple microbial death or the required ultraviolet radiation of inactivation that obtains to leave over after coagulation/settling process.

Sedimentation water ultraviolet transmittance, the flow rate measurements of sedimentation water ga(u)ge 9, the ultraviolet Illumination Distribution that arrangement limited of later stage ultraviolet radiation device 10 medium ultraviolet lamps and the flow condition that changes with flow path structure and flow velocity that controller 14 is measured according to sedimentation water ultraviolet (uv) transmission meter 18 are controlled the ultraviolet lamp output of later stage ultraviolet radiation device 10 with arithmetic equation such as above-mentioned arithmetic equation (1)-(2).Say that more specifically controller 14 changes with the essential ultraviolet output valve of arithmetic equation calculating according to ultraviolet transmittance and flow velocity.Thereby this controller has been controlled the electric power of supplying with the ultraviolet lamp the later stage ultraviolet radiation device 10 from ultraviolet lamp power supply 13b.

Briefly say, the system of present embodiment respectively by in the early stage process early stage ultraviolet radiation device 5 and the later stage process in later stage ultraviolet radiation device 10 control and carry out treatment with uv radiation.Therefore, realized making microorganism comprise inactivation or harmless processing such as algae by the ultraviolet radiation effect in the early stage process, realized the microbial death still left over after coagulation/settling process or the processing of inactivation by the ultraviolet radiation effect in the later stage process.

Then, in water treatment system, especially in water system etc., may obtain the ultraviolet radiation effect, thereby tackle algae safely and reliably and pathogenic micro-organism etc. is carried out sterilization (sterilization) handle.Also have, in the present embodiment system, may reduce the consumption that injects the chloro-containing reagent of water decontamination process in the prior art greatly.The result is, may prevent deleterious by product as with the haloform that produces in the chloro-containing reagent sterilization process.And, also may reduce and inject the required cost of chloro-containing reagent.

＜the second embodiment 〉

Fig. 2 is the block diagram of the water treatment system major portion of second embodiment of the present invention.

The system of present embodiment is equipped with as the raw water turbidity meter 21 of former water ultraviolet transmittance measuring apparatus and former water callophane 23, and the sedimentation water callophane 24 as sedimentation water ultraviolet transmittance measuring apparatus also is housed.Simultaneously, represent with same reference numbers that with system's identical functions assembly of first embodiment shown in Figure 1 it describes omission in detail.

In the system of present embodiment, with the raw water turbidity input controller 14 that raw water turbidity meter 21 is measured, also the former water fluorescence intensity that former water callophane 23 is measured is imported controller 14.Also have, the sedimentation water fluorescence intensity that sedimentation water callophane 24 is measured is imported controller 14.

Raw water turbidity meter 21 is measured the turbidity of the former water sample of being collected by former water sampling tube 15.Here, former water sampling tube 15 is connected in the connecting tube of pond 2 and ultraviolet radiation device 5 in early stage.

Former water callophane 23 is measured by former water sampling tube 15 and is collected and by the fluorescence intensity of filtration unit 22 filtering former water samples.

On the other hand, sedimentation water callophane 24 is measured the fluorescence intensity of the sedimentation water sample of being collected by sedimentation water sampling tube 17.Here, sedimentation water sampling tube 17 is connected in pipeline between coagulation/settling bowl 3 and the later stage ultraviolet radiation device 10.

Simultaneously, in former water callophane 23, need to remove turbidity substance with dissolved organism in the former water of accurate measurement.Therefore, filtration unit 22 is arranged on the early stage of former water callophane 23, thereby removes turbidity substance in the former water.Conversely,, in coagulation/settling bowl 3, remove turbidity substance, therefore, do not need to arrange filtration unit for the sedimentation water of measuring by sedimentation water callophane 24.

(operation of second embodiment and effect)

Explain the operation and the effect of present embodiment hereinafter with reference to Fig. 2 and 3-5.

Usually, when ultraviolet through-fall, because the organic absorption of dissolved etc. has reduced uitraviolet intensity in the turbidity substance of water float such as particulate absorption and scattering, the water.Say that more specifically uitraviolet intensity leaves radiating surface with ultraviolet ray to be reduced.Ultraviolet transmittance (%) representative penetrates the ultraviolet ratio of 1 cm distance.Here, the example of measuring the device of ultraviolet transmittance comprises ultraviolet (uv) transmission meter 16,18, as shown in Figure 1.

Yet general ultraviolet line transmission gage has and places silica glass standard cell to measure the structure of ultraviolet transmittance in batch sample water, or has the structure that the sample water of making flows in the silica glass cell and measures ultraviolet transmittance in real time.In the structure of measuring in batch, can not be set to the contrast index that ultraviolet lamp is exported by ultraviolet transmittance.Also have, in making sample water mobile structure, the ultraviolet transmittance that can not correct measurement causes by the dust on the silica glass chamber surface.

The system of present embodiment has not need be with common ultraviolet (uv) transmission meter, and the structure of estimating ultraviolet transmittance according to the measuring result and the dissolved organic concentration of raw water turbidity.

Ultraviolet transmittance comprise since the absorption of the turbidity substance of water float and scattering weaken component and since in the water the organic absorption of dissolved weaken component.Therefore, by measuring raw water turbidity and the organic concentration of dissolved, can estimate ultraviolet transmittance.

Fig. 3 is only considering because the graph of a relation between raw water turbidity and the ultraviolet transmittance under the situation of the absorption of turbidity component and diffuse transmission influence.As shown in Figure 3, have dependency between turbidity and the ultraviolet transmittance, shown in following equation (3), determined relation:

T _tu＝F(tu)(％) (3)

T in the formula _TuFinger only is the ultraviolet transmittance (%) under the situation of turbidity substance at ultraviolet radiation absorption/scattering method, and tu refers to turbidity.

Also have, ultraviolet absorbance is as the index that shows the absorption of dissolved organic matter in the water.Following equation (4) has been determined the relation between ultraviolet absorbance and the ultraviolet transmittance:

α _oc＝-ln(T _oc/100) (4)

In the formula, under the situation of only considering the organic absorption of dissolved, α _OcRefer to ultraviolet absorbance, T _OcRefer to ultraviolet transmittance (%).Therefore, measure ultraviolet absorbance and just can obtain ultraviolet transmittance.

The former water fluorescence intensity that controller 14 inputs of present embodiment are measured by former water callophane 23, thus ultraviolet absorbance calculated, and estimate the organic concentration of dissolved (referring to Fig. 4) the former water from ultraviolet absorbance.

Fig. 4 answers the 345nm excitation wavelength and the measuring result figure that concerns between the fluorescence intensity of the 425nm wavelength of fluorescence that produces and the ultraviolet absorbance with river.As shown in Figure 4, linear dependence between fluorescence intensity (excitation wavelength 345nm, wavelength of fluorescence 425nm) and the ultraviolet absorbance (wavelength 253.7nm).

It is confirmed that, to have very strong dependency with the fluorescence intensity of this moment, as shown in Figure 5 as the concentration of the exponential dissolved organic carbon (DOC) of dissolved organic matter concentration.From as can be seen,, can calculate ultraviolet transmittance T here from the relation between Fig. 4 and the above-mentioned equation (4) by measuring fluorescence intensity with former water callophane 23 _Oc(in the value of only considering under the situation that dissolved organic matter absorbs), shown in following equation (5):

T _oc＝100×exp(-c×FL)(％) (4)

C refers to coefficient in the formula, and FL refers to fluorescence intensity.

In sum, can obtain considering total ultraviolet transmittance T of turbidity substance and organic absorption of dissolved and scattering in the former water by following equation (6):

T＝T _tu+T _oc(％) (6)

The fluorescence intensity that raw water turbidity that controller 14 usefulness raw water turbidity meters 21 are measured and former water callophane 23 are measured is calculated the ultraviolet transmittance of former water.As described in above-mentioned first embodiment, controller 14 is according to the ultraviolet lamp output of former water ultraviolet transmittance control ultraviolet radiation device 5 in early stage.Therefore, to early stage ultraviolet radiation device 5 provide and do not waste and suitable electric power, thereby may realize the sterilization (sterilization) of algae killing effect and pathogenic micro-organism completely to former water.

Also have, ultraviolet transmittance with first embodiment in identical mode be subjected to former water float material, turbidity substance and the organic influence of dissolved.Therefore, when raw water turbidity was increased, ultraviolet transmittance reduced greatly.In this case, controller 14 is controlled ultraviolet radiation device 5 shut-down operations in early stage, or ultraviolet lamp output is reduced to lower limits value.In this case, by operation three-way valve 7a, 7b control break flow path, it is dirty because floating substance and turbidity substance and organism adhere to prevent internal pipeline that former water is flowed in bypass pipe 6.And controller 14 is brought up to the output of later stage ultraviolet radiation device 10 more than the standard value, the loss of compensation sterilization (sterilization) performance in the early stage process.

To explain the method for control later stage ultraviolet radiation device 10 below.

Later stage ultraviolet radiation device 10 is arranged in later stage of coagulation/settling bowl 3, with ultraviolet radiation in sedimentation water as treating water.In this case, from treating water, remove turbidity substance.Therefore, controller 14 can calculate the ultraviolet transmittance of sedimentation water according to the fluorescence intensity that deposition callophane 24 is measured from the relation of above-mentioned equation (5).

Therefore, controller 14 control ultraviolet lamp outputs guarantee ultraviolet ray amount essential in the later stage ultraviolet radiation device 10 with the flow velocity of measuring according to the ultraviolet transmittance and the sedimentation water ga(u)ge 9 of sedimentation water.So, possible accuracy the pathogeny microorganism is carried out sterilization.Also has the power consumption of to avoid waste.

＜the three embodiment 〉

Fig. 6 is the block diagram that shows the water treatment system major portion of the 3rd embodiment of the present invention.

The system of present embodiment relate to be arranged in respectively early stage ultraviolet radiation device 5 and later stage ultraviolet radiation device 10 in ultraviolet luxmeter 19,20 carry out ultraviolet radiation control.Simultaneously, represent with same numbers that with system's identical functions assembly of first embodiment shown in Figure 1 it describes omission in detail.

As shown in Figure 6, the system of present embodiment has the ultraviolet luxmeter 19,20 that is arranged in respectively in early stage ultraviolet radiation device 5 and the later stage ultraviolet radiation device 10.With respectively from the measuring result of ultraviolet luxmeter 19,20 input controller 14.

Fig. 7 is ultraviolet radiation device 5 the cut-away view in early stage that is used for the system of present embodiment, shown ultraviolet lamp 27 be arranged in the vertical direction for the treatment of water flow direction on situation.Simultaneously, internal structure is also identical under the situation of later stage ultraviolet radiation device 10.

As shown in Figure 7, be equipped with a plurality of ultraviolet lamps 27 in ultraviolet radiation device 5 and the later stage ultraviolet radiation device 10 early stage, the ultraviolet lamp protective tube of being made by silica glass 28 also is housed, to protect each ultraviolet lamp 27.Also have, early stage, ultraviolet radiation device 5 and later stage ultraviolet radiation device 10 were equipped with cleaning brush parts 29, with cleaning protective tube 28.Cleaning brush parts 29 drive (and being cleaning drive unit 26) by cleaning drive unit 25 in later stage ultraviolet radiation device 10. Cleaning drive unit 25,26 is by controller 14 controls.

Be configured; the controller 14 of present embodiment can be by using UV power meter 19,20; the cleaning brush parts 29 of operation control ultraviolet lamp protective tube 28, and the performance of monitoring ultraviolet lamp 27 are exported control to each ultraviolet lamp 27 in the ultraviolet radiation device 5,10.Below with these operations of specific explanations.

(the output control of ultraviolet lamp 27)

Control method described in controller 14 usefulness above-mentioned first or second embodiment is controlled the output that is contained in the ultraviolet lamp 27 in the ultraviolet radiation device 5 in early stage.Here, when importing controller 14, can monitor the ultraviolet illumination of ultraviolet radiation device 5 inside in early stage all the time from the observed value of UV power meter 19.

On the other hand, default (storage) makes (algae or the pathogenic micro-organism etc.) death of pending microorganism or the necessary ultraviolet ray amount of inactivation target value-dose objective in controller 14.Also have, will be from the observed value F of raw water flow meter 4 _RArithmetic equation (7) and the being used for arithmetic equation (8) that calculates ultraviolet ray amount target value I target on the desired location of ultraviolet luxmeter 19 from ultraviolet ray amount target value-dose objective and retention time t of ultraviolet radiation device 5 flow path Structure Calculation retention time t is arranged on controller 14 with early stage:

t＝(S×L)/F _R(s) (7)

In the formula, F _RBe the observed value (m of raw water flow meter ³/ s); S is representative flow path cross-sectional area (m ²), L is a representative flow path length (m):

I _Target=C _t* (dosage _Target/ t) (mW/cm ²) (8)

C in the formula _tBe correction coefficient, concern constant K according to the position of ultraviolet luxmeter 19 and ultraviolet lamp 27 by the relation of equation (9) _tAnd the observed value T of former water ultraviolet (uv) transmission meter 16 _RDetermine this coefficient.

C _t＝K _t×f(T _R) (9)

The observed value I of above-mentioned arithmetic equatioies of controller 14 usefulness (8) and ultraviolet luxmeter 19 _MeasureCome relatively " I _Measure" and " I _Target".When comparative result shows " I _Measure＜I _Target" time, controller 14 is controlled the output that makes ultraviolet lamp 27 to be increased.When comparative result shows " I _Measure＞I _Target" time, controller 14 is controlled the output that makes ultraviolet lamp 27 and is reduced.

Simultaneously, controller 14 also carries out identical output control to later stage ultraviolet radiation device 10.(the cleaning control of ultraviolet lamp protective tube and the radiance monitoring of ultraviolet lamp)

Be provided with in the controller 14 of present embodiment: arithmetic equation (10) is used for calculating ultraviolet lamp protective tube 28 lip-deep ultraviolet illumination I when ultraviolet lamp 27 outputs ₀Arithmetic equation (11) is used for the observed value I from ultraviolet luxmeter 19 _MeasureCalculate ultraviolet lamp protective tube 28 lip-deep ultraviolet illumination I _M0And I ₀With I _M0The permissible value Δ I of difference _f, " Δ I=I ₀-I _M0":

I ₀＝η _UV×w/W(mW/cm ²) (10)

If η _UV=f (w)

W refers to the constant input electric power of ultraviolet lamp (W) in the formula; W refers to ultraviolet lamp input electric power set(ting)value (W); η _UVRefer to ultraviolet output efficiency (%):

I _M0=f (K _M0, I _Measure, T _R) (mW/cm ²) (11)

K in the formula _M0It is constant by the relation decision of the position between ultraviolet lamp 27 and the ultraviolet luxmeter 19; I _MeasureObserved value (the mW/cm that refers to ultraviolet luxmeter 19 ²); T _RRefer to former water ultraviolet transmittance (%).

Controller 14 is with the I of above-mentioned arithmetic equation (10) and (11) calculating ₀And I _M0Poor " Δ I=I ₀-I _M0" and " Δ I _f" compare.When comparative result shows " Δ I 〉=Δ I _f" time, controller 14 control cleaning drive units 25 make it operate the cleaning brush 29 of ultraviolet lamp protective tube 28.

To explain the operation of the radiance of monitoring ultraviolet lamp below.

According to the characteristic of single fluorescent tube, the ultraviolet ray of ultraviolet lamp 27 produces efficient and reduces in time.Therefore, need the periodic replacement ultraviolet lamp.Therefore, when controller 14 determined that the degeneration that occurs surpasses the scope of ultraviolet lamp 27 permissions, demonstration of controller control output was changed ultraviolet lamp 27 immediately from promptings such as display equipments.

More specifically say, with the surface illumination initial value I of ultraviolet lamp protective tube 28 _InitialPermissible value Δ I with the reduction of fluorescent tube performance _InitialBe arranged in the controller 14.After cleaning brush assembly 29 work of ultraviolet lamp protective tube 28, controller 14 is immediately from the observed value I of ultraviolet lamp luxmeter 19 _MeasureCalculate the surface ultraviolet ray illumination I of ultraviolet lamp protective tube 28 with above-mentioned arithmetic equation (11) _M0 Controller 14 is with calculated value and default initial illumination I _InitialPoor " Δ I _c=I _Initial-I _M0" the permissible value Δ I that reduces with lamp behaviour _InitialCompare.When comparative result shows " Δ I _c＞Δ I _Initial" time, this controller shows output, ultraviolet lamp 27 is changed in prompting immediately.

After changing ultraviolet lamp 27, Δ I _cMust equal 0 immediately.Yet in fact the initiation performance of ultraviolet lamp 27 is uneven, and therefore, the performance permissible value of new lamp is set to Δ I _Initial, 0.In addition, be " Δ I when changing the result who compares immediately behind the ultraviolet lamp 27 _c＞Δ I _{Initial, 0}" time, controller 14 produces alarms, informs that protective tube 28 is made mistakes, cleaning brush is 29 rotten, miscellaneous equipment is made mistakes etc.Also have, controller shows output, and with demonstration information, full maintenance is carried out in prompting immediately one time, comprises changing protective tube 28 and changing cleaning brush 29.

Simultaneously, the ultraviolet lamp 27 of 14 pairs of later stage ultraviolet radiation devices 10 of controller carries out identical Monitoring and Controlling.

In brief, system according to present embodiment, may judge that the ultraviolet ray amount is too much and not enough according to ultraviolet luxmeter 19,20 observed value separately that is arranged in early stage ultraviolet radiation device 5 and the later stage ultraviolet radiation device 10, with output by feedback compensation and control ultraviolet lamp 27.And, by the reduction that monitoring ultraviolet lamp protective tube 28 lip-deep dust situations and monitoring ultraviolet lamp 27 produce efficient, can operate control and fluorescent tube maintenance support to the cleaning brush parts 29 of ultraviolet lamp protective tube 28.The result is, can realize the water treatment system of the maintenance of the automatic maintenance of stabilizing UV radiance and ultraviolet radiation device 5,10.

＜the four embodiment 〉

Fig. 8 is the water treatment system of the 4th embodiment of the present invention and the synoptic diagram of using the water correction plant of this water treatment system.

In water correction plant, for example, sedimentation basin 52 and pond 53, floss form pond 54, settling bowl 55, middle mixing pit 56, filtering basin 57, chlorine mixing pit 58 and distribution reservoir (distributing reservoir) 59 be arranged in upstream one side that the river supplies former water 51 flow paths to the downstream one side.Also have, at former water 51 in above-mentioned each pond 52-59 in the process of flowing, the water treatment of in each pond, being scheduled to.Thereby former water 51 made drinkablely purify waste water 60, it is broadcasted to each water user from distribution reservoir.

Below will explain the concrete steps of water treatment.

At first, in sedimentation basin 52, big sand grains that originally comprises in the former water 51 and ash fall are to the bottom.Therefore, removed the treating water inflow pond 53 of big sand grains and dust.When treating water when sedimentation basin 52 flows to pond 53, measure " flow velocity " for the treatment of water with under meter 61a.The flow rate measurements input is injected and radiation control unit 63 early stage.When treating water when sedimentation basin 52 flows to pond 53, measure " turbidity " for the treatment of water by turbidimetry unit 64a.The turbidity measurement input is injected and radiation control unit 63 early stage.

The clorox of injection and radiation control unit 63 specified amounts injects pond 53 by the unitary injection pump 65a of N with early stage.Also have, the ultraviolet ray of injection and radiation control unit 63 specified amounts is radiated pond 53 by N ultraviolet (UV) lamp 66a with early stage.That is, pond 53 becomes clorox and injection in ultraviolet early stage and radiant.Except that above-mentioned clorox, also sodium hydroxide 67a is injected above-mentioned pond 53.By sodium hydroxide 67a, clorox and ultraviolet ray, in pond 53, carry out water treatment, comprise that algae is extremely handled and to the processing of killing of algae and microorganism.

The 64a combination of turbidimetry unit: the clarity for the treatment of water is measured the turbidometer of the turbidity for the treatment of water from pond 53; The particulate counter that the quantity of buoyant particulate in 53 treating water of pond is counted; Detect, for example the callophane of the bioinformation of algae; And by the certain wavelength of radiation, for example the UV (ultraviolet ray) of the UV detection active material of 730nm counts.

The purpose of injecting clorox and ultraviolet radiation is to comprise that algae is extremely handled and to the water treatment of killing processing of algae and microorganism.Turbidity increases with a large amount of generations of algae that comprises in the treating water etc.Therefore, set clorox and ultraviolet target injection rate and radiation quantity according to turbidity.Promptly, " turbidity " that send to injection in early stage and radiation control unit 63 from turbidimetry unit 64a is the turbidity that extraction algae and microorganism obtain as turbidity composition main component, and the turbidity composition is shown by algae and diatom, cyanobacteria, bacterium and sand mud material.Say that more specifically it is the turbidity that obtains by the range estimation turbidity that correction is measured from the clarity for the treatment of water with each observed value of particulate counter, callophane and UV (ultraviolet ray) meter.

Simultaneously, consider from aspects such as laid down costs, can be only by measure the turbidometer configuration turbidimetry unit 64a that handles water turbidity from the clarity for the treatment of water.

(for the first time) sterilization premenstruum in pond 3 and the treating water that kills after algae is handled form in the pond 54 by under meter 61b and turbidimetry unit 64b inflow floss.Poly aluminium chloride (so-called PAC68a) is injected the treating water that floss forms pond 54.With PAC 68a with the impurity solidification that comprises in the treating water.This makes can remove the impurity that comprises in the treating water.Then, treating water flows into the settling bowl 55 as the pond in mid-term.The flow velocity that under meter 61b is measured sends to injection in mid-term and radiation control unit 69.Also the turbidity that turbidimetry unit 64b is measured sends to and injects and radiation control unit 69 mid-term.

To inject mid-term with the clorox of radiation control unit 69 specified amounts and inject settling bowl 55 by the unitary injection pump 65b of N.Also have, the ultraviolet ray that will inject mid-term with radiation control unit 69 specified amounts is radiated settling bowl 55 by N ultraviolet (UV) lamp 66b.Therefore, settling bowl 55 becomes clorox and injection in ultraviolet mid-term and radiant.Except that above-mentioned clorox, also sodium hydroxide 67b is injected settling bowl 55.By sodium hydroxide 67b, clorox and ultraviolet ray, in settling bowl 55, carry out water treatment, comprise that algae is extremely handled and to the processing of killing of algae and microorganism.In settling bowl 55, deposited the particulate that comprises in the treating water.

In next mid-term mixing pit 56, sterilization in mid-term (for the second time) and killing in the treating water after algae is handled when being added in PAC 86b in the settling bowl 55.Then, in next filtering basin 57, filter.

In filtering basin 57, the treating water after the filtration flows into chlorine mixing pit 58 by under meter 61c and turbidimetry unit 64c.The flow rate measurements that under meter 61c is measured sends to later stage injection and radiation control unit 70.Also the turbidity measurement that turbidimetry unit 64c is measured sends to later stage injection and radiation control unit 70.

To inject in the later stage with the clorox of radiation control unit 70 specified amounts and inject chlorine mixing pit 58 by the unitary injection pump 65c of N.Also have, the ultraviolet ray that will inject in the later stage with radiation control unit 70 specified amounts is radiated chlorine mixing pit 58 by N ultraviolet (UV) lamp 66c.Therefore, chlorine mixing pit 58 becomes clorox and injection of ultraviolet later stage and radiant.

And, with the treating water of sodium hydroxide 67c injection chlorine mixing pit 58.In chlorine mixing pit 58, adjust the chlorine content that comprises in the treating water.Carrying out killing for the third time algae with sodium hydroxide, clorox and ultraviolet ray handles and disinfects.Then, treating water is stored in the distribution reservoir 59.The treating water that stores is distributed to each user as purified water 60.

Fig. 9 is the block diagram of schematic structure that comprises the Monitoring and Controlling unit 62 of computer in the water treatment system.Injection and radiation master mode table 71 are provided in Monitoring and Controlling unit 62, have comprised the I/O unit 74 of display unit 72 and operating unit 73, and raw water turbidity determination unit 75.Simultaneously, operating unit 73 comprises keyboard and mouse.

Injection and radiation master mode table 71 have stored the data of the method for handling according to the turbidity of pond 53, settling bowl 55 and chlorine mixing pit 58.Specifically, as shown in figure 10, former water 51 turbidity measurement according to 64a input in turbidimetry unit among Fig. 8, set each turbidity scope 81a, 81b and 81c, it is high turbidity (turbidity 10 or higher, turbidity scope 81a), middle turbidity (turbidity 5 or higher and, turbidity scope 81b) and low turbidity (turbidity less than 5, turbidity scope 81c) less than 10.According to each turbidity scope 81a, 81b and 81c and early stage unit (pond 53), unit in mid-term (settling bowl 55) and later stage unit (chlorine mixing pit 58) is default is used for master mode 82 that clorox injects processing or treatment with uv radiation.

For example, when the turbidity of former water 51 is 10 or during higher high turbidity (turbidity scope 81a), inject early stage and radiation control unit 63 early stage pond 53 only treating water is killed the algae processing and sterilizes with clorox.Also have, inject mid-term and radiation control unit 69 mid-term settling bowl 55 only treating water is killed the algae processing and sterilizes with clorox.In addition, later stage injection and radiation control unit 70 kill algae processing and sterilization at later stage chlorine mixing pit 58 usefulness clorox and ultraviolet ray to treating water.

When the turbidity of former water 51 is 5 or higher and during less than 10 middle turbidity (turbidity scope 81b), inject early stage and radiation control unit 63 early stage ultraviolet ray of pond 53 usefulness and clorox treating water killed the algae processing and sterilize.Also have, inject mid-term and radiation control unit 69 kills the algae processing to treating water and sterilizes in settling bowl 55 usefulness ultraviolet ray in mid-term.In addition, later stage injection and radiation control unit 70 only kill algae processing and sterilization with clorox to treating water at later stage chlorine mixing pit 58.

And, when the turbidity of former water 51 is low turbidity (turbidity scope 81c) less than 5, inject early stage and radiation control unit 63 early stage pond 53 only treating water is killed the algae processing and sterilizes with ultraviolet ray.Also have, inject mid-term and radiation control unit 69 mid-term settling bowl 55 only treating water is killed the algae processing and sterilizes with ultraviolet ray.In addition, later stage injection and radiation control unit 70 kill algae processing and sterilization at later stage chlorine mixing pit 58 usefulness clorox and ultraviolet ray to treating water.

Raw water turbidity determination unit 75 is measured among Fig. 8 in early stage and is belonged to turbidity scope 81a, 81b and the 81c which from the turbidity measurement of the former water 51 of turbidimetry unit 64a input.The raw water turbidity determination unit shows measurement result and turbidity information on display unit 72.Also have, the raw water turbidity determination unit sends to master mode reading unit 76 with measurement result.

Master mode reading unit 76 read the unit in early stage that belongs to turbidity scope 81a, 81b and 81c, mid-term the unit and the later stage unit in be used to inject each master mode 82 of clorox and ultraviolet radiation.Then, master mode reading unit 76 sends to corresponding early stage injection and radiation control unit 63, mid-term injection and radiation control unit 69 and later stage injection and radiation control unit 70 by automatic/hand switch unit 78 with each output unit 80a, 80b and 80c with master mode 82.

When operator scheme was set to " manual mode ", master mode was provided with unit 77 master mode 82 is sent to corresponding injection and radiation control unit 63,69 and 70 by the automatic/hand switch unit 78 that switches to manual mode with each output unit 80a, 80b and 80c.Here, the operator is with reference to being shown in turbidity scope 81a, 81b and the 81c of the former water 51 on the display unit 72, by operating unit 73 inputs corresponding to injecting early stage and inject in radiation control unit 63, mid-term and the master mode of radiation control unit 69 and later stage injection and radiation control unit 70.

Each injects and radiation is provided with unit 79a, 79b and 79c and the injection rate of clorox or ultraviolet radiation quantity are sent to that inject early stage and injects in radiation control unit 63, mid-term and radiation control unit 69 and later stage injection and radiation control unit 70.More detailed theory, injection and radiation are provided with amount or the ultraviolet amount of radiation (set(ting)value) (this amount is specified with operating unit 73 by the operator) that will inject clorox to the treating water of unit in early stage (pond 53), unit in mid-term (settling bowl 55) and later stage unit (chlorine mixing pit 58) in the unit and send to injection in early stage shown in Figure 8 and radiation control unit 63, injection in mid-term and radiation control unit 69 and later stage injection and radiation control unit 70 by output unit 80a, 80b and 80c.

Figure 11 is the image of display screen 83 of the display unit 72 of I/O unit 74.Display screen 83 has: control unit designated button 84a, the 84b and the 84c that specify injection in early stage and radiation control unit 63, injection in mid-term and radiation control unit 69 and later stage injection and radiation control unit 70 respectively; Specify master mode designated button 85a, 85b and the 85c of above-mentioned three kinds of master modes 82 " clorox ", " ultraviolet ray " and " clorox+ultraviolet ray "; And the mode switch button 86 of specifying and switch the master mode of injection in early stage and radiation control unit 63, injection in mid-term and radiation control unit 69 and later stage injection and radiation control unit 70 respectively.

Simultaneously, for injecting and one of radiation control unit 63,69 and 70, once can not press two or more among master mode designated button 85a, 85b and the 85c.Can select " computer patterns ", " automatic mode " and " manual mode " as operator scheme.

And, in display screen 83, arranged set amount input block 87, be used for when selecting " manual mode ", writing the injection rate and the ultraviolet radiation quantity of clorox.Set amount input block 87 makes the operator write the clorox amount (injection rate of per unit volume) injected as the operation of keyboard in the treating water of unit in early stage (pond 53), unit in mid-term (settling bowl 55) and later stage unit (chlorine mixing pit 58) and to radiating ultraviolet ray amount (radiation quantity of per unit volume) wherein by operating unit 75.Also have, shown in the display screen 83 from the raw water turbidity 88 and the turbidity measurement result 89 of 75 inputs of raw water turbidity determination unit.

Figure 12 is the block diagram of the schematic structure of injection in early stage and radiation control unit 63.Therefore the structure of injection of mid-term injection and radiation control unit 69 and later stage and radiation control unit 70, omits its explanation here with injection and radiation control unit 63 are basic identical in earlier stage.

In operating unit 73, specify " computer patterns " or " automatic mode " by mode switch button 86, when master mode 82 " clorox " is assigned to injection in early stage and radiation control unit 63 automatically, Monitoring and Controlling unit 62 will drive instruction 96a by output unit 80a and be passed to clorox injection rate control unit 96.Because in this case, can not be passed to ultraviolet radiation quantity control unit 97 with driving instruction 97a, do not drive radiation quantity control unit 99.Therefore, can be in the treating water in pond 53 with ultraviolet radiation.

As shown in FIG. 13A, turbidity/injection rate converting unit 98 has stored the turbidity measurement that makes its treating water (former water 51) that flows into pond 53 and has waited to inject relation information between the per unit volume target injection rate (SV) of clorox for the treatment of water.In turbidity/injection rate converting unit 98, the turbidity measurement of input is converted to the value of the per unit volume injection rate (SV) of clorox to be injected.Also have, the injection rate conversion value is sent to injection rate control unit 96.

Injection rate control unit 96 carries out feed forward control (FF control).Specifically, injection rate control unit 96 sends to injection pump driver element 100 with the injection rate (injection rate of time per unit) that per unit volume target injection rate (SV) multiply by flow rate measurements (PV) acquisition of under meter 61a.Injection pump driver element 100 drives the injection pump 65c of some amount according to injection rate.The result is to inject the treating water in pond 53 corresponding to the clorox amount of " turbidity ".

In operating unit 73, when mode switch button 86 is specified " computer patterns " or " automatic mode ", " ultraviolet ray " of master mode 82 be assigned to automatically that inject early stage and during radiation control unit 63, Monitoring and Controlling unit 62 will drive by output unit 80a and instruct 97a to be passed to amount of ultraviolet irradiation control unit 97.On the other hand, this Monitoring and Controlling unit can will not drive instruction 96a by output unit 80a and be passed to clorox injection rate control unit 96.Therefore, do not drive clorox injection rate control unit 96, thereby clorox can not injected the treating water in pond 53.

Shown in Figure 13 B, turbidity/radiation quantity converting unit 99 has stored the turbidity measurement that makes its treating water (former water 51) that flows into pond 53 and has been radiated relation information between the ultraviolet per unit volume target emanation amount (SV) in the treating water.In turbidity/radiation quantity converting unit 99, the turbidity measurement of input is converted to the value of the per unit volume radiation quantity (SV) of ultraviolet radiation.Also have, the radiation quantity conversion value is sent to radiation quantity control unit 97.

Radiation quantity control unit 97 sends to UV lamp quantity setup unit 101 with the radiation quantity (radiation quantity of time per unit) that per unit volume target emanation amount (SV) multiply by flow rate measurements (PV) acquisition of under meter 61a.Shown in Figure 13 C, the radiation quantity of above-mentioned multiplication and the relation information between the UV lamp 66a quantity to be lighted in UV lamp quantity setup unit 101, have been stored.In UV lamp quantity setup unit 101, light quantity by the specified UV lamp 66a corresponding to radiation quantity of radiation quantity control unit 97.Thereby, will be radiated in the treating water in pond 53 corresponding to the ultraviolet ray amount of turbidity measurement.

In operating unit 73, when mode switch button 86 has been specified " computer patterns " or " automatic mode ", " clorox+ultraviolet ray " of master mode 82 be assigned to automatically that inject early stage and during radiation control unit 63, Monitoring and Controlling unit 62 will drive by output unit 80a and instruct 96a to be passed to clorox injection rate control unit 96.Also have, in this case, this Monitoring and Controlling unit will drive instruction 97a and be passed to amount of ultraviolet irradiation control unit 97.

Under the state of injection rate control unit 96 and 97 work of radiation quantity control unit, in the treating water in pond 53, inject clorox and radiation ultraviolet ray.More detailed theory changes into 1/2 respectively with injection rate control unit 96 and the specified respectively injection rate of radiation quantity control unit 97 and radiation quantity.The value of injection rate and radiation quantity is sent to injection pump driver element 100 and UV lamp quantity setup unit 101.This makes and may inject a certain amount of clorox and ultraviolet radiation according to the turbidity for the treatment of water in the early stage pond 53.

Up to now, in operating unit 73, when mode switch button 86 is specified " computer patterns " or " automatic mode ", when each turbidity scope 81a (high turbidity), 81b (middle turbidity) and 81c (low turbidity) are specified in " clorox ", " ultraviolet ray " and " clorox+ultraviolet ray " of master mode 82 respectively, inject early stage and radiation control unit 63 execution specific operations.

Injection in mid-term and radiation control unit 69 are basic identical with the structure of early stage injection and radiation control unit 63.Therefore, in operating unit 73, when mode switch button 86 is specified " computer patterns " or " automatic mode ", during with " clorox " of master mode 82, each turbidity scope 81a (high turbidity), 81b (middle turbidity) that " ultraviolet ray " and " clorox+ultraviolet ray " specifies former water 51 " turbidity " respectively and 81c (low turbidity), inject mid-term and specific operation that radiation control unit settling tank in 69 pairs of mid-terms 55 is carried out and injection in aforementioned early stage and radiation control unit 63 basic identical.

Also have, the later stage injects and radiation control unit 70 injected with early stage and the structure of radiation control unit 63 is also basic identical.Therefore, the specific operation of injection clorox that the later stage injects and 70 pairs of chlorine mixing pits of radiation control unit 58 are carried out and ultraviolet radiation and injection in aforementioned early stage and radiation control unit 63 are basic identical.

Therefore, injecting and radiation master mode table 71, " clorox ", " ultraviolet ray " and " clorox+ultraviolet ray " of master mode 82 are being set each turbidity scope 81a (high turbidity), 81b (middle turbidity) and the 81c (low turbidity) that gives former water 51 respectively.Therefore, in operating unit 73, when mode switch button 86 is specified " computer patterns " or " automatic mode ", may according to be set in injection in the Monitoring and Controlling unit 62 and radiation master mode table 71 to early stage pond 53, mid-term settling bowl 55 and later stage chlorine mixing pit 58 inject clorox and ultraviolet radiations automatically.

Simultaneously, as inject and the setting content of radiation master mode table 71 shown in, in principle, to the limited and amount of ultraviolet irradiation increase of pond 53 clorox injection rate in early stage.The clorox injection rate of later stage chlorine mixing pit 58 is increased and amount of ultraviolet irradiation is limited.Thereby limit as much as possible from a large amount of clorox that inject pond 53 in early stage and produce by product (generation haloform).That is, may further improve 60 the water quality safety of purifying waste water of supplying with the user by water correction plant.

On the other hand, when former water 51 turbidity that flow into water correction plant are high, reduce, improve the clorox injection rate of injecting pond 53 in early stage pond 53 amount of ultraviolet irradiation in early stage.

Therefore, according to the combination of each phase such as early stage, mid-term and later stage, adjust the ratio of each interim clorox injection rate and amount of ultraviolet irradiation.The result is more effectively to kill algae processing and sterilization.

And, when the injection rate of clorox in the whole water correction plant reduces, the chemical that is used for assembling and removing the turbidity substance of water) clorox and aggregating agent prepared therefrom PAC (poly aluminium chloride: chemical cost reduction such as.This feasible running cost that may reduce water correction plant.

To explain below that when the mode switch button in the operating unit 73 86 is selected " manual mode " early stage injects and the block diagram of the schematic structure of the operation of radiation control unit 63, injection in mid-term and radiation control unit 69 and later stage injection and radiation control unit 70.

Suppose that in operating unit 73,62 mode switch button 86 is selected " manual mode ", control unit designated button 84a specifies " inject and radiation control unit 63 early stage " so, also has master mode designated button 85a to specify " clorox ".In this case, the specification signal 85aa of " clorox " of display control mode 82 becomes high-level state.Specification signal 85aa is from the output unit 80a output of Monitoring and Controlling unit 62.Simultaneously, specification signal 85bb, the 85cc of " ultraviolet ray " of display control mode 82 and " clorox+ultraviolet ray " maintain low-level state.

The result is, injects and radiation control unit 63 is set up AND door 90 in early stage, by OR door 91 set(ting)value switching circuit 92 switched to its setting injection rate one side.With " injection rate in early stage " row of setting in the set amount input block 87 that injection rate writes display screen 83, and its injection and radiation setup unit 79a from Fig. 9 sent.That is, the set(ting)value of the clorox injection rate that the operator is set sends to injection rate control unit 96.

When mode switch button in the operating unit 73 86 was selected " manual mode ", the injection rate (injection rate of time per unit) that the flow velocity that injection rate control unit 96 is measured under meter 61a multiply by the acquisition of per unit volume setting injection rate sent to injection pump driver element 100.In this case, do not adopt the target injection rate that has by pond 53 turbidity of turbidity/conversion that injection rate converting unit 98 is exported.

Injection pump driver element 100 drives the injection pump 65c of some amount according to injection rate.The result is the clorox of operator's specified amount to be injected the treating water in pond 53 by operating unit 73.

In operating unit 73, when mode switch button 86 is selected " manual mode ", when master mode designated button 85a presses " clorox " with control unit designated button 84a appointment " inject and radiation control unit 63 early stage ", do not set up AND door 93, the output of OR door 94 is in low-level.Therefore, set(ting)value switching circuit 95 switches to initial value (=a 0) side.

When mode switch button 86 was selected " manual mode ", radiation quantity control unit 97 was assigned to UV lamp quantity setup unit 101 with radiation quantity.Therefore, when initial value is 0, the treating water in the pond 53 is not carried out ultraviolet radiation substantially.

Promptly, when control unit designated button 84a selects " inject and the radiation control unit early stage ", and when master mode designated button 85a presses " clorox ", only the clorox of operator's specified amount is injected the treating water in pond 53 by set amount input block 87.

Also have, when mode switch button 86 is selected " manual mode ", control unit designated button 84a specifies " inject and the radiation control unit early stage ", and during master mode designated button 85a selection " ultraviolet ray ", do not set up AND door 90, the output of OR door 91 is in low-level.In this case, set(ting)value switching circuit 92 switches to initial value (=a 0) side.The result is owing to identical with the situation of above-mentioned radiation quantity control unit 97, the treating water in the pond 53 not to be carried out ultraviolet radiation.

On the contrary, when setting up AND door 93, set(ting)value switching circuit 95 switches to by OR door 94 and sets radiation quantity one side.To set " radiation quantity in early stage " row that injection rate writes the set amount input block 87 in the display screen 83, and it is sent to radiation quantity control unit 97 by input and radiation setup unit 79a.That is, the ultraviolet set(ting)value that the operator is set is passed to radiation quantity control unit 97.

When mode switch button 86 was selected " manual mode ", radiation quantity control unit 97 was set radiation quantity with per unit volume and be multiply by the radiation quantity (radiation quantity of time per unit) that flow rate measurements that under meter 61a measures obtains and send to UV lamp quantity setup unit 101.UV lamp quantity setup unit 101 is turned on the UV lamp 66a of some amount according to radiation quantity.In this case, do not adopt target emanation amount with turbidity of changing by the pond 53 of turbidity/radiation quantity converting unit 99 outputs.

Promptly, when control unit designated button 84a selects " inject and the radiation control unit early stage ", and when master mode designated button 85b selects " ultraviolet ray ", the ultraviolet ray of operator's specified amount is radiated in the treating water in pond 53 by set amount input block 87.

In addition, suppose mode switch button 86 selections " manual mode ", control unit designated button 84a specifies " inject and the radiation control unit early stage " so, also has master mode designated button 85a selection " clorox+ultraviolet ray ".In this case, the specification signal 85cc of " clorox+ultraviolet ray " of display control mode becomes high-level state.In this case, because the output of OR door separately 91,94 is in high-level state, sets injection rate one side and set radiation quantity one side so set(ting) value switching circuit 92,95 switches to respectively.The result is that injection rate control unit 96 and radiation quantity control unit 97 are all worked.The operator is write the treating water in the clorox injection rate injection pond 53 of the set amount input block 87 on the display screen 83.Also have, the amount of ultraviolet irradiation that the operator is write set amount input block 87 is radiated in the treating water in pond 53.

In this case, inject clorox respectively and carry out ultraviolet radiation.Therefore, compare with the situation that radiation quantity control unit 97 works independently with injection rate control unit 96, the operator sets injection rate respectively and sets half that radiation quantity is set to standard.

Up to now, in operating unit 73, when mode switch button 86 is specified " manual mode ", control unit designated button 84a specifies " inject and the radiation control unit early stage ", master mode designated button 85a, 85b, 85c specify one of " clorox ", " ultraviolet ray " and " clorox+ultraviolet ray ", when set amount input block 87 is specified " injection rate " and ultraviolet " radiation quantity " of clorox, inject early stage and radiation control unit 63 execution specific operations.

In the identical operations step, the operator can inject and radiation control unit 69 and later stage injection and radiation control unit 70 by operating unit 73 off-line operations mid-term.Thereby, can on operating unit 73, set clorox injection rate and amount of ultraviolet irradiation arbitrarily, treating water in the mid-term settling bowl 55 and the treating water in the later stage chlorine mixing pit 58 are handled.

Above-mentioned by taking " manual mode ", possible Iterim Change injects and ultraviolet radiation the clorox for the treatment of water in early stage pond 53, mid-term settling bowl 55 and the later stage chlorine mixing pit 58, even when concentrated precipitation makes the condition flip-flop of former water 51, or because when continuing a few days abnormal high temperature and making the condition changing of former water 51.

Simultaneously, in " computer patterns " and " automatic mode ", inject a certain amount of clorox and carry out a certain amount of ultraviolet radiation from the treating water in the pond 53 in early stage of trend water correction plant, mid-term settling bowl 55 and the later stage chlorine mixing pit 58 according to the turbidity measurement for the treatment of water.

Below will explain by using radiation to remove other advantage that algae is operated water correction plant.

As precondition, in the water field of purification, be gathered into floss and deposit then to reduce the raw water turbidity in coagulation/precipitation apparatus with gathering chemical (aggregating agent prepared therefrom or pH regulator agent, gathering auxiliary agent), turbidity substance (suspension turbidity substance).Then, in early stage filtering basin, in sand filter etc., remove by filter these accumulative turbidity substances.In this, the obstruction of filtering basin becomes obviously in low speed filtering basin, high-speed filter etc., therefore, need reduce the turbidity of former water before reaching to a certain degree.Therefore, coagulation/sedimentation becomes and is even more important for the operation water correction plant.

As mentioned above, the algae that comprises in the former water is the major cause of filtering basin blockage problem, uses aggregating agent prepared therefrom to remove these algae.

Therefore, before adding aggregating agent prepared therefrom, kill algae with ultraviolet ray and clorox and handle, thereby make the clean cycle time of water correction plant longer.Therefore, it helps to reduce the consumption of aggregating agent prepared therefrom, reduces the cost of annual chemical, and prevents that filtering basin from stopping up.Therefore, removing algae with ultraviolet ray is an important advantage to the unit (mainly being company, local government) that carries out water treatment.

The invention is not restricted to above-mentioned embodiment, but can implement the present invention and not deviate from purport of the present invention by other specific form.And those skilled in the art obviously can extract each phase of the present invention by the disclosed multiple integrant of each embodiment is carried out appropriate combination.For example, even when from all key elements shown in the embodiment, leaving out some elements.And, some key elements of the different embodiments of composite crossover suitably.

Those skilled in the art will easily expect additional advantages and modifications.Therefore, the present invention is not limited to detail shown and described herein and representative embodiments at it aspect extensive.Therefore, can make various modifications and do not deviate from the spirit or scope of claims and total inventive concept that Equivalent limited thereof.

Claims (8)

1. water treatment system, described system makes the former water Continuous Flow of input through a plurality of ponds along former water flow path arranged in series, and water treatment is scheduled in the pond at former current during through these ponds, thereby makes the former water of input become drinkable purified water, it is characterized in that described system comprises:

According to the treating water in the early stage that is arranged in each pond of former water flow path arranged in series, inject and radiation control unit (63) early stage of the amount of control injection clorox and the amount of ultraviolet radiation;

According to the treating water in the mid-term that is arranged in each pond of former water flow path arranged in series, inject and radiation control unit (69) mid-term of the amount of control injection clorox and the amount of ultraviolet radiation;

According to the treating water in the later stage that is arranged in each pond of former water flow path arranged in series, the later stage of the amount of control injection clorox and the amount of ultraviolet radiation injects and radiation control unit (70);

Be used to measure the first turbidimetry unit (64a) of the water turbidity of upstream, pond (53);

Be used to measure the second turbidimetry unit (64b) of the water turbidity between pond (53) and the settling bowl (55);

Be used to measure the 3rd turbidimetry unit (64c) of the water turbidity between settling bowl (55) and the chlorine mixing pit (58);

High turbidity mode control device (62,71,75,76,81a), be used for as turbidimetry unit (64a, 64b, 64c) raw water turbidity of Ce Lianging is when surpassing the high turbidity of default top reference value, order is injected early stage and the radiation control unit only injects clorox, order injection in mid-term and radiation control unit only inject clorox, and the order later stage injects and the radiation control unit injects clorox and radiation ultraviolet ray;

Middle turbidity mode control device (62,71,75,76,81b), be used for as turbidimetry unit (64a, 64b, 64c) raw water turbidity of Ce Lianging is when being lower than default top reference value and surpassing the middle turbidity of default below reference value, order is injected and radiation control unit injection clorox and radiation ultraviolet ray early stage, order is injected and the only radiation ultraviolet ray of radiation control unit mid-term, and the order later stage injects and the radiation control unit only injects clorox;

Low turbidity mode control device (62,71,75,76,81c), be used for as turbidimetry unit (64a, 64b, 64c) raw water turbidity of Ce Lianging is when being lower than the low turbidity of default below reference value, order is injected early stage and the radiation control unit only injects clorox, order is injected and the only radiation ultraviolet ray of radiation control unit mid-term, and the order later stage injects and the radiation control unit injects clorox and radiation ultraviolet ray; With

Be used to measure the first flow measuring apparatus (61a) of the flow of upstream, pond (53);

Be used to measure second flow measurement device (61b) of the flow between pond (53) and the settling bowl (55);

Be used to measure the 3rd flow measurement device (61c) of the flow between settling bowl (55) and the chlorine mixing pit (58);

Wherein, high turbidity mode control device, middle turbidity mode control device and low turbidity mode control device separately respectively according to first flow velocity with and first product of the first turbidity correlation, second flow velocity with and second product of the second turbidity correlation, the 3rd flow velocity with and the 3rd product of the 3rd turbidity correlation, the injection and the radiation control unit in order early stage, mid-term, later stage.

2. water treatment system as claimed in claim 1 is characterized in that, this system further comprises:

The measurement turbidity for the treatment of water is converted to the turbidity injection rate converting unit of the essential injection rate of clorox; With

The measurement turbidity for the treatment of water is converted to the turbidity radiation quantity converting unit of the essential radiation quantity of ultraviolet ray.

3. water treatment system as claimed in claim 1, it is characterized in that being used for the raw water turbidity of described former water and the turbidity of each treating water is the turbidity that obtains with the turbidity that each observed value correction turbidometer of callophane, UV meter and particulate counter measures is measured.

4. water treatment system as claimed in claim 1 is characterized in that,

Described a plurality of pond comprises sedimentation basin, pond, settling bowl, filtering basin, chlorine mixing pit and the distribution reservoir of arranging one side to the downstream from upstream one side of former water flow path at least.

5. water treatment system as claimed in claim 2 is characterized in that,

Described a plurality of pond comprises sedimentation basin, pond, settling bowl, filtering basin, chlorine mixing pit and the distribution reservoir of arranging one side to the downstream from upstream one side of former water flow path at least.

6. water treatment system as claimed in claim 2 is characterized in that, described system also comprises:

According to specify radiation quantity set the ultraviolet lamp quantity of opening ultraviolet lamp quantity setup unit and

Set the injection pump driver element of the quantity of clorox injection pump according to specifying injection rate.

7. water treatment system as claimed in claim 2 is characterized in that,

The raw water turbidity of described former water and the turbidity of each treating water are the turbidity that obtains with the turbidity that each observed value correction turbidometer of callophane, UV meter and particulate counter measures is measured.

8. water treatment system as claimed in claim 6 is characterized in that,

The raw water turbidity of described former water and the turbidity of each treating water are the turbidity that obtains with the turbidity that each observed value correction turbidometer of callophane, UV meter and particulate counter measures is measured.

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