KR20020016604A - Process for high density waste water treatment - Google Patents

Abstract

The present invention relates to a wastewater treatment method, the apparatus is composed of a coagulation, sedimentation, natural dehydration tank, pressurized flotation tank, ultra-miniature bubble generator and a dryer as a main device, the coagulation, sedimentation, natural dehydration tank is iron on the outside It is a tank (4), the inner side of the steel mesh (3), the dewatering filter mill (2) is inserted and mounted again inside the steel mesh, and the flocculation device (6) is installed inside the dewatering filter mill inside the raw water inflow pipe Tank constructed in connection with (10) Are connected to each other, the inlet pipe is installed in the upper tank is configured with a coagulant inlet 15 is installed, the blowing pipe (Q) is built in the inside of the pipe when the raw water flows into the stirring and flocculation is made quickly and diffused into the tank The suspended solids form a full lock, and the suspended solids in the water are separated and settled. The treated water immediately flows out of the filter mill and flows into the floating separation tank 10, and the untreated fine suspended solids are floated and separated. The collection is discharged or transferred to the next treatment. The tanks alternately inflow of condensed water and alternately have a rest time, and the sludge settled in the tank is naturally dehydrated at rest time, transferred to a dryer, completely dried and discharged to the outside. The present invention provides a high-density sludge wastewater treatment apparatus and method that can omit the dehydration facility.

Description

Process for high density waste water treatment and method

The present invention relates to a wastewater purification treatment apparatus and method, and more particularly, to agglomeration, sedimentation, and natural dehydration in one apparatus, and to transfer treated clarified water to a flotation tank to remove untreated fine suspended solids. The present invention relates to a method for treating sludge wastewater of high concentration which is discharged after transporting natural dehydrated sludge to a dryer.

Referring to FIG. 3, a precipitation method widely used to remove suspended solids as a conventional technology is neutralized by introducing raw water into a neutralization tank 3-1, followed by a reaction tank 3-2 and an agglomeration tank 3. 3) In this case, the designated flocculant is injected into each tank, followed by stirring, and then flows into the settling tank (3-4), and the suspended solids in the inflow water flowing into the settling tank form a floc and gradually descend and settle. The clarification water is separated, and the separated clarification water flows into the discharge tank 3-5 and is discharged, or is transferred to the biological treatment tank 3-6, which is the next treatment process, and then treated. 7) is discharged and discharged. On the other hand, the sludge settled in the lower layer of the sedimentation tank is transferred to the sludge storage tank (3-8) to undergo a forced dehydration treatment in the dehydration device (3-10) through the coagulation process.

However, in the flocculation tank (3-3), the condensed water introduced into the settling tank (3-4) is precipitated by forming a pull-lock, and the inflow water stays in the settling tank for a long time due to the very slow settling speed. The sedimentation tank becomes huge by the residence time. In addition, when the precipitated sludge is transferred to the storage tank, a considerable amount of clarification water flows out together with the sludge, thereby increasing the amount of sludge while increasing the moisture content of the sludge, thereby making the dewatering treatment facility vast.

As described above, in the conventional sedimentation method, a long residence time is required for sedimentation of suspended solids, and the sedimentation tank is enlarged by the residence time, and the clarification water flows out with the Increasing the amount of sludge has a problem of making the dewatering treatment plant vast.

In order to solve the above problems, the present invention comprises a cohesion, sedimentation, natural dehydration tank, floating separation tank, ultra-miniature bubble generator, and a dryer as a main device, which is connected to a plurality of alternatingly operated, raw water as an inflow pipe. In the process of transfer through the flocculant injection and stirring while flowing into the tank while the flocculation and sedimentation proceeds, the clarified water is separated into the flotation tank by flotation to remove the fine suspended solids floating in the precipitation process, The precipitated sludge allows natural dehydration to proceed in the same tank, and provides a high concentration of sludge wastewater treatment method for transporting the dried dehydrated sludge to a drying apparatus for drying.

1 is a device layout of the present invention

Figure 2 is a coagulation, sedimentation, natural dehydration device

3 is a conventional sedimentation method wastewater purification apparatus

<Description of Important Parts of Drawing>

Natural Dewatering Precipitation Tank G. Bubble Generator

B. Gig port valve P. Coagulant injection pipe

Q. Blowing pipe C. Gifoto room

D.E. Floating Separation Room H. Perforated Steel Sheet

F. Clarification Room O. Sludge Outflow

S. Dryer N. Buffer

Se. Sensor 12 · 13. Solenoid valve

10. Inflow pipe 3. Dewatering filter mill

2. steel mesh 1. iron tank

6. Quick stirring device 8. Switchgear

9. Transfer pipe 102. Floating separation tank

This patent covers coagulation, sedimentation, and natural dehydration tanks ( ), The pressurized floatation tank 102, the ultra-miniature gun generator G, and the dryer S are constituted as main apparatuses.

Agglomeration, sedimentation, and natural dehydration tanks are four-hole or cylindrical tanks with a smaller inner diameter at the lower part and penetrated. The outer side is an iron tank (1). The steel mesh tube (2) is inserted and fixed to secure a space between the iron tank and the steel mesh tube. Inside the steel mesh tube (2), the same type and dewatering filter mill (3) of the same size as the steel mesh tube is inserted and installed. In addition, a quick agglomeration device (6) is built into the filter back (3), and a compressed air supply pipe (Q) with an air diffuser (D) is built in the agglomeration device, and a buffer chamber (F) is provided in the lower part. It is installed and connected to the inlet pipe 10, the opening and closing device 8 for opening and closing when discharging the sludge in the lower tank is mounted, the connecting pipe (9a) of the opening and closing device is connected to the connecting pipe (9b) by the connector (J) ) And the discharge pipe (9) is made of a tank, the tank configured in this way The two are connected to each other, the inlet pipe 10 having the coagulant inlet 14 from the outside and the diffuser pipe 15 therein from the outside Branched and installed in the tank, the solenoid valves 12, 13 are laid in the branched pipe, and a water level sensor Se is placed at the top of each tank to sense the water level in the tank. Are alternately operated, the lower portion of the switchgear 8 is provided with a conveyor 101 for transporting the sludge discharged when the switchgear is opened and connected to the sludge storage tank 103, the dryer (below) S) is installed, the pipe (9) for clarification water transfer from the flocculation, sedimentation, and natural dehydration tank is connected to the photo port chamber (C) of the flotation separation tank 102, the flotation tank is the photo port chamber (C). ), The floating separation chamber (D · E), and the clarification water chamber (F) are partitioned inside, and the photo port ejection valve (B) is installed in the gas outlet chamber (C), and the ultra-fine foam generator (G) Connected with each other, the coagulant injection pipe (P) is placed in close proximity to the gas outlet valve (S) to configure the device.

BEST MODE Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional view of the present invention, Is a coagulation, sedimentation, and dehydration tank which is connected to each other in a row and is described in detail as shown in FIG. 2, 102 is a floating separation tank, (G) is an ultra-small force generating device, and (S) is a drying device.

Figure 2 shows the coagulation, sedimentation, dehydration device in detail, the same type, the same size tank It consists of vertically connected rows, and alternately dehydrates the sludge that has settled with the inflow and rest of raw water.

(1) is a circular iron tank, the upper part is the inner diameter is large, the inner diameter at the bottom is small, the inner side is laid in the required number of fixing bars (5) for fixing the steel mesh (2), the lower outer surface with a smaller inner diameter A discharge pipe 9 is attached thereto, and (2) is inserted into the iron tank inside the steel tank and is fixed by the holder 5 to secure a space for transferring the effluent water between the iron tank and (3) Is a dewatering filter mill, which is inserted and mounted in close contact with the inner side of the steel barrel (2), and is fixed to the hook (4) attached to the circumference of the upper portion of the iron tank (1). Close the lower part with this string when inflowing raw water, and release it when discharging the sludge.

(6) is a rapid agglomeration device, a compressed air supply pipe (9) with an air diffuser (D) is built therein and a buffer chamber (F) is attached to the lower portion is connected to the inlet pipe (10) from the top, Numeral 10 denotes an inlet pipe, in which a coagulant inlet 14 from the outside, and a compressed air diffuser pipe 15 for mixing coagulant and raw water injected therein are incorporated.

(8) is a switchgear, it is attached to the lower through-hole in which the inner diameter of the iron tank (1) is small, it is closed when the raw water inflow, and is opened when the sludge is discharged, has a little space inside and close to the iron tank The inner upper part is made of perforated steel plate (H), and when closed, it is a passage for the outflow water holding the load of the dewatering filter mill (3), and (7) is the locking device to open and close the opening and closing device (8). Releases the opening and closing device at a right angle (K), and (J) is a connector, and the connection pipes 9a and 9b can be freely connected and released from each other. (9) is a clarification water conveying pipe connected to the flocculation, sedimentation and dewatering tank and the flotation separation tank 102, and transfers the clarification water to the gas separation chamber (C) of the flotation separation tank.

1, reference numeral 102 denotes a flotation separation tank, which is divided into a gipoport exit chamber (C), a flotation separation chamber (D · E), a clarification water storage chamber (F), and a scum recovery passageway (O). Sedimentation and Dewatering Tanks ) And the gas outlet chamber (C) are connected to each other through the transfer pipe (9), and the gas outlet chamber (B) is installed in the gas outlet chamber (C) is connected to the bubble generating device (G) as a pipe. The injection pipe P for injecting coagulant is placed in close proximity to the gas outlet valve.

Figure 1 (G) is a micro-foam generating device, is connected to the discharge valve (B) attached to the floating separation tank photo outlet chamber (C) by a pipe to generate and transport the ultra-mini-foam.

1, 103 is a sludge storage tank, and receives the dehydrated sludge from the conveyor 101 and supplies it to the dryer while storing the sludge, (S) supplies the dehydrated sludge from the sludge storage tank 103 as a dryer. Take it out and dry it.

Next, the operation of the embodiment configured as described above will be described.

first In order to operate the tank, when the raw water is introduced into the inlet pipe 10, the coagulant is injected from the coagulant inlet 14 and the coagulant and the raw water are mixed and reacted by stirring with compressed air discharged from the acid pipe 15, thereby rapidly reacting the device. When it is transferred to (6), rapid stirring and coagulation proceeds by the vortex of air released from the air diffuser (D), and it is pushed into the tank naturally through the buffer chamber (F), and from this time, the floating material forms flocs. While the clarification water is separated, the clarification water is separated by the hydraulic pressure and flows out of the dewatering filter mill (3) regardless of floc sedimentation and moves downward through the space between the iron tank (1) and the steel mesh (2). When it flows down and flows into the gasoline exit chamber C of the floating separation tank through the connecting pipes 9a and 9b of the switchgear 8 and the discharge pipe 9, the coagulant is injected through the coagulant injection pipe P. Super ultra-century gun The high-pressure micro-foamed bubbles generated by the generator G are discharged and dissipated from the gas discharge valve B, and the ultra-mini-foams are diffused into the discharge chamber. As the suspended solids are formed into full-lock, they are adsorbed and adhered to the ultra-fine cloth and forced to float to the surface, and are naturally transported to the floating separation chamber (C · D), while the clarification water is separated into the bottom and the sludge is separated into the water surface. According to the discharge, the clarified water separated into the lower part is transferred to the clarification water room (F) and discharged to the outside according to the discharge water quality standard, or is transferred to the biological treatment tank 104 which is the next treatment process.

On the other hand, the floc descends and settles under the filter mill, and as time passes, the settled sludge gradually rises and the water level rises as well, and the water level sensor Se detects it at a predetermined level. So Closing the solenoid valve 12 of the tank stops the inflow of raw water By opening the solenoid valve 13 of the tank to inject the raw water into the tank B The tank enters a rest state.

Go into a dormant state The remaining clarified water flows out from the tank, and the precipitated sludge is spontaneously dehydrated to be located in the lower part of the filter mill (3). The sludge loosens the connector (J) to connect the connecting pipe (9a) and (9b). Release the locking device (7) and open the opening and closing device (8), the string under the filter back (3) is released and the sludge is discharged underneath. And close the switch The tank will return to standby.

And a certain time has elapsed, In the tank As in tanks, when the water level rises, the water level sensor detects it. Close the solenoid valve 13 of the tank to stop the inflow of raw water, and again By opening the solenoid valve 12 of a tank, the inflow of raw water into tank A starts. As the above operation is repeated continuously, the reaction, flocculation, sedimentation, and natural dehydration are continuously performed in the same tank, and a predetermined amount of the treated water continues to flow into the gas separation chamber C of the flotation separation tank 102.

On the other hand, the sludge discharged from each tank is transferred to the sludge supply tank 103 by the operation of the conveying conveyor 101, the amount determined by the supply regulator (S-6) in this supply tank is a dryer (S) Injected to the inlet side (S-2) of the), the injected sludge is made to dry while passing through the tunnel on the conveyor (S-5) is discharged from the outlet side (S-3).

The present invention is injecting, stirring, and agglomeration of the flocculant in the course of raw water inflow, and the flocculated flocculant is diffused into the tank while floc is formed and the clarification water is separated and flows out of the filter back to the flotation separation tank. By increasing the efficiency of treatment by flotation and separation of the floating material in the water, which is not processed and floating in the water, it can be drastically reduced in facility and processing cost according to the miniaturization of the facility. Can be.

Claims (1)

This patent covers coagulation, sedimentation, and natural dehydration tanks ( ), The pressurized floatation tank 102, the ultra-fine air bubble generator (G) and the dryer (S) as a main device, the incoming raw water is diverted from the diffuser pipe (15) built in the inlet pipe (10) It is agitated by the compressed air to be agglomerated while passing through the rapid agglomeration device (6), the tank in the buffer chamber (F) ) As the suspended solids form flocs as it enters and diffuses into the water, the clarification water is separated, and the separated clarification water flows out of the filter mill (3) and flows into the floating separation tank photo port (C). The coagulant is injected from the pipe (P), and the bubble port valve (B) supplied with the bubble water from the bubble generating device (G) emits ultra-fine bubbles and simultaneously agitates and agglomerates. Sludge wastewater treatment method characterized in that the clarification water is discharged or transported to the next process, and the naturally dehydrated sludge is transported to a dryer to be dried by being adsorbed and attached to the fabric and separated from the flotation.