WO2008022561A1 - A filtration and adsorption material used in water treatment and the preparation thereof - Google Patents

Abstract

A filtration and adsorption material used in water treatment and the preparation thereof. The main parameters of the filtration and adsorption material are as follows: methylene blue adsorption value 30~85mg/g; ash 8~15%; packed density 200~550g/l; iodine adsorption value 260~720 mg/g; surface area 200~600m2/g; chemical oxide demand(COD) 200~3000 mg/g. The preparation includes: heating the raw materials to 120-150ºC; rising the temperature to 350-400ºC at 4-6ºC/min to dry the raw materials; rising the temperature to 510-650ºC at 6-8ºC/min and keeping the temperature for 40-70min to distillate and carbonize the raw materials; rising the temperature to 800-950ºC at 6-10ºC/min and introducing one or two of steam and flue gas when the temperature reaches 800ºC, and keeping the activation temperature between 800-950ºC for 20-60min to activate the materials, in which the consumption of saturated steam is 0.5-3 ton/ton raw materials, the ratio of flue gas to steam is 1:5 or 0.

Description

 Filter adsorbent for water treatment and preparation method thereof

Technical field

 The invention relates to a material and a processing method thereof, in particular to a semi-coke filter adsorbent for treating industrial waste water, urban sewage, and a preparation method for processing coal into the semi-coke filter adsorbent. Background technique

 At present, most urban sewage and industrial wastewater (especially industrial wastewater with large emissions) are treated by biochemical, anaerobic, aerobic, activated sludge, chemical addition, etc. The above method covers a large area and consumes a large amount of electricity. A large amount of sludge is produced during the treatment, and it is difficult to treat wastewater that is difficult to biochemical such as high salt, high acid, and high COD. At present, there are various solid adsorbents for water treatment, such as activated carbon, charcoal, bentonite, diatomaceous earth, calcium carbonate, slag, coke breeze, slag, etc. The above adsorbent is not high in production cost, but has small specific surface area and adsorption capacity. Low, especially for urban sewage and industrial wastewater treatment with large discharge and high concentration of pollutants, or high treatment cost or large amount of adsorbent or frequent replacement, so it is rarely used in industrial wastewater and urban sewage treatment. Can it be used to produce a municipal wastewater and industrial wastewater that is low in cost and can be widely used in water treatment, especially in high emissions and high pollutant concentrations, to reduce the footprint and power consumption of urban sewage and industrial wastewater facilities, and wastewater treatment? The semi-coke filter adsorption material which is lower in cost than biochemical treatment and capable of treating difficult biochemical wastewater such as high salt, high acid and high COD has not been reported so far. Summary of the invention

 The invention solves the prior art method for treating urban sewage and industrial wastewater, has large land occupation, high power consumption, generates a large amount of sludge during the treatment process, and is difficult to biochemically high in high salt, high acid and high COD content. The problem that the wastewater can not be treated and the solid adsorbent currently used for water treatment have high production cost, small specific surface area and low adsorption capacity, especially when used for urban sewage and industrial wastewater treatment with large discharge amount and high concentration of pollutants, or It is carried out with a high processing cost or a large amount of adsorbent or frequent replacement.

 Accordingly, it is an object of the present invention to provide a filter adsorbent for water treatment and a process for producing the filter adsorbent.

 The inventors have intensively studied and invented a filter adsorbent to achieve the above object.

The filter adsorbent of the invention is low in production cost and can be widely used for water treatment, in particular, large discharge, Urban sewage and industrial wastewater with high pollutant concentration reduce the floor space and power consumption of urban sewage and industrial wastewater facilities. The wastewater treatment cost is lower than the biochemical treatment cost and can deal with high salt, high acid and high COD. Semi-coke filter adsorption material for wastewater. In addition, the filter adsorbent provided by the invention has the advantages that the raw material is cheap and easy to obtain, and the preparation method is also very simple, and is suitable for mass production.

 Specifically, the present invention provides a filter adsorbent for water treatment, which is a semi-coke filter adsorbent whose main parameters are as follows:

 Methylene blue adsorption value: 30~85mg/g

 Ash: 8~15%

 Filling density: 200~550g/l

 Iodine adsorption value: 260~720mg/g

 Specific surface area: 200~600m7g

 Filter adsorbent yield: 400kg~600kg/ton of raw materials

 Chemical oxygen demand (COD) Adsorption capacity: 200~3, 000mg/g

 In order to obtain a filtered adsorbent having the above parameters, the present invention provides a method for preparing the filtered adsorbent, which comprises heating the treated raw material to 120~150'C, drying the raw material; and then 4' C ~ 6 / min rate to 350 ~ 400 ° C; continue to increase the temperature to 6 ~ 8 ° C / min to 510 ~ 650 Ό, constant temperature 40 ~ 70 minutes, the raw materials are carbonized and carbonized; continue to 6 ~ 10' C. The steam (saturation) consumption is 0. 51. The rate of C / min is increased to 800 ~ 950 'C, and the activation reaction is carried out by introducing one or two of steam and flue gas when the temperature reaches 80 CTC, wherein the steam (saturation) consumption is 0.51. ~ 3 tons / ton of raw materials, the ratio of the flue gas to the steam is 1: 5 or 0, the activation time is 20 to 60 minutes, and the activation temperature is 800. C ~ 950 ° C.

 The treated raw material includes a coalaceous raw material having a particle diameter of less than 10 mm obtained by crushing and screening. The raw materials for preparing the filter adsorbent according to the invention may be anthracite, lean coal, lean coal, coking coal, fat coal, gas coal, long flame coal, lignite as raw materials, or coal processing products such as coke, basket carbon and coke as raw materials. . detailed description

 The invention is described in detail below, and is intended to be illustrative, and not intended to limit the scope of the invention.

The filter adsorbent of the present invention is a semi-coke filter adsorbent for water treatment, and a solid adsorbent currently used for water treatment such as activated carbon, charcoal, bentonite, diatomaceous earth, calcium carbonate, slag, coke powder, slag Compared to its main parameters are as follows: Methylene blue adsorption value: 30~85mg/g

 Ash: 8~15%

 Filling density: 200~550g/l

 Iodine adsorption value: 260~720mg/g

Specific surface area: 200~600ra ² /g

 Filter adsorbent yield: 400kg~600kg/ton of raw materials

 Chemical oxygen demand (COD) Adsorption capacity: 200~3, 000mg/g.

 In the present invention, the semi-coke is mainly controlled by the processing temperature (heating), which can be observed with the naked eye. The use of semi-coke activation is mainly for the purpose of obtaining large pores and mesopores of the filter adsorbent, which is suitable for industrial wastewater and urban sewage treatment.

 It can be seen from the above that the semi-coke filter adsorbent of the invention has large specific surface area and strong adsorption capacity, and is suitable for treating waste water such as chloric acid washing wastewater, coking wastewater, papermaking wastewater, urban sewage and the like. Since the adsorbent of the present invention uses various coals which are inexpensive and easily available as a raw material, it is inexpensive to use for treating urban sewage and industrial wastewater, and the adsorbent of the present invention can also be used for high treatment. Salt, high acid, high COD content and other difficult to biochemical wastewater.

The semi-coke filter adsorbent of the present invention may be prepared by a method comprising the steps of: heating the treated raw material to 120 to 150 ° C, drying the raw material; and then raising the temperature at a rate of 4×6 to 6 ° C/min. To 350 ° C ~ 400 ° C _; continue to increase the temperature to 510 ° C ~ 650 ° C at a rate of 6 ° C ~ 8 ° C / min, constant temperature 40 ~ 70 minutes, the raw materials are carbonized and carbonized; continue to 6 ~ 10 ° The rate of C/min is raised to 800~950'C. When the temperature reaches 800'C, steam and flue gas are introduced to activate the reaction. The steam (saturation) consumption is lt~3 tons/ton of raw materials, flue gas and The ratio of steam is 1:5 or 0, the activation time is 20 to 60 minutes, and the activation temperature is 800 to 950 'C.

 The main components of the flue gas are carbon dioxide, carbon monoxide, sulfur dioxide, nitrogen and water vapor. The flue gas mainly comes from the flue gas generated during the combustion process of the fuel (coal, gas, natural gas, coke) for filtering the adsorbent preparation heating device, or the steam boiler for supplying steam to the filter adsorbent preparation device ( Coal, gas, natural gas) The flue gas produced during the combustion process.

 The steam is produced and supplied by a steam boiler, which may be saturated steam or superheated steam, preferably superheated steam, which can reduce the heat absorbed by the steam after entering the filter adsorption preparation device, and maintain the inside of the preparation equipment. temperature.

In one embodiment of the invention, no flue gas is introduced, i.e., the method includes activation using only steam. In still another embodiment of the invention, the steam and flue gas are simultaneously introduced. In still another embodiment of the present invention, the steam and the flue gas are not simultaneously introduced, that is, the temperature is raised to

At 800 ° C, steam is first activated, and after 5-10 minutes, it is activated by flue gas. In still another embodiment of the present invention, the steam and the flue gas are not simultaneously introduced, that is, when the temperature is raised to 800 ° C, the steam is first activated, and after 5-10 minutes, the steam and the smoke are simultaneously introduced. The gas is activated.

 In another embodiment of the invention, the steam is water vapor.

 The treated raw material includes a coalaceous raw material having a particle diameter of less than 10 mm obtained by crushing and screening. The raw materials for preparing the filter adsorbent of the present invention may be anthracite, lean coal, lean coal, coking coal, fat coal, gas coal, long flame coal, lignite as raw materials, or coal processing products such as coke, basket carbon, and coke. raw material.

 In the preparation method of the present invention, coal is selected as a raw material for filtering the adsorbent. When selecting, according to the requirements and parameters of the filter adsorbent, the suitable raw materials are selected, and then, among various suitable raw materials, one is selected. The raw material for making the lowest cost of filtering adsorbent. When calculating the production cost of the adsorbent, in addition to the price of the raw materials and the freight, the composition, activity and yield of the filtered adsorbent prepared are compared. Generally, coal with low metamorphism has high volatile matter, low ash content and high activity, and can obtain a filter material with a higher specific surface area at a lower activation temperature, but the yield of the filter adsorbent is low; The coal has low volatile content, high ash content and poor reaction activity. At the same activation temperature or residence time, the obtained adsorbent has a lower specific surface area, but the yield of the filtered adsorbent is relatively high. Anthracite, lean coal, lean coal, coking coal, fat coal, gas coal, long flame coal, lignite can be used as raw materials, and coal processing products such as coke, basket charcoal and coke may be used as raw materials.

The apparatus for preparing a filter adsorbent of the present invention may be a well-known apparatus, basically: a crushing apparatus, a screening apparatus, a conveying apparatus, a steam boiler, and a heating furnace which can be heated to a drying and carbonization temperature. The crushing device is used for crushing the raw materials; the screening device is used for screening the crushed raw materials; the conveying device is to send the filtered raw materials to the heating furnace; the steam boiler is used for generating steam to carry out the raw materials. Activation; The furnace is a conventional heating device with drying control for drying and charring the raw materials. The ideal equipment can be used in the "rotary semi-coke filter processing unit" provided by the application number 200410100439. 8 (publication number CN1660964). When the filter is used to prepare the filter adsorbent, the generated dust and flue gas which are unfavorable to the environment can be effectively recovered, and automatic continuous production can be realized, thereby improving production efficiency. According to the information disclosed in this patent application, the working principle of the structure of the unit will be briefly described below. It should be noted that the equipment used in the present invention is not strictly limited as long as it can satisfy the pulverization, screening, and the required drying and carbonization carbonization temperatures. The reason why the unit is briefly described herein is to facilitate the understanding of the preparation method of the present invention by those skilled in the art and to carry out the implementation. The rotary semi-coke filter processing unit drum has a double-tube structure, consisting of an inner cylinder and an outer cylinder, and is made of heat-resistant alloy steel, the inner cylinder diameter is 900-4, 000 mm, and the outer cylinder diameter is 1,500-5,200 mm. , The length-to-diameter ratio of the drum is 12:1; the ring gear, the reinforcing ring, the rolling ring and the sliding sealing device are respectively arranged in different parts outside the drum; the interlayer between the inner tube and the outer tube is a gas heating chamber; the inner tube is coal material coking The coking chamber is divided into a drying section and a dry distillation section; when the rotary adsorbing material is prepared by the rotary semi-coke filter material processing unit, the activation section is added to the inner cylinder of the unit. The drum of the unit is placed obliquely and is located on the two roller assemblies. The transmission is driven by the ring gear on the drum. The rotation speed of the drum is 1-3 revolutions per minute. The temperature measurement system is installed on the drum for monitoring the drum. The temperature of each section; one end of the outer cylinder of the drum is connected with the combustion chamber, and the other end is connected with the flue gas collecting chamber; one end of the inner cylinder of the drum is connected with the upper sealing chamber, and the other end is connected with the lower sealing chamber; There are sliding sealing devices, and the sealing device structure is piston ring type, labyrinth type or steam type; a heat exchanger is installed between the flue gas discharging device and the flue gas collecting chamber for recovering the flue gas from the gas heating chamber The heat in the flue gas discharged from the collection chamber. The flue gas discharge device, the flue gas collection chamber and the heat exchanger are connected by a pipe. The earth seal chamber is equipped with a screw feeder, a sealed coal supply box, a coal storage tank, and a cyclone separator, a gas purification device and a gas system; the ignition chamber of the unit is equipped with an ignition device, and the unit is equipped with a gas ignition provided by the gas generator. ; The heating rate during ignition is 4'C/min. The outside of the unit is insulated and insulated. The insulation material of the drum part is made of aluminum silicate fiber felt, and the protective shell made of steel plate is wrapped. The other parts are made of ordinary heat insulation materials according to the surface temperature.

According to the invention, the selected raw materials are crushed by a crushing device, sieved by a screening device to prepare a raw material having a particle size of < 10111111, and the processed raw materials are sent from a conveying device to a heating furnace for drying and dry distillation and carbonization. The drying temperature is 120~150°C _. After the material in the unit is dried, the temperature is raised to 350~400Ό at a rate of 4~6'C/min, and the temperature is raised to 510 at a rate of 6~8°C/min. ~650'C, then constant temperature for 40~70 minutes, the material in the unit is carbonized and carbonized; continue to heat up to 800~950'C at a rate of 6~10 °C/min, and steam at a temperature of 80 (TC) The activation reaction is carried out, the steam (saturation) consumption is 11 to 3 tons / ton of raw materials, the ratio of flue gas to steam is 1: 5 or 0, and the activation time is 20 to 60 minutes.

 According to a known measurement method, the main parameters of the filter adsorbent prepared by the present invention are as follows - methylene blue adsorption value: 30 ~ 85 mg / g

 Ash: 8~15%

 Filling density: 200~550g/l

 Iodine adsorption value: 260~720mg/g

Specific surface area: 200~600m ² /g

 Filter adsorbent yield: 400kg~600kg/ton of raw materials

 Chemical oxygen demand (COD) Adsorption capacity: 200~3, 000mg/g

Among the above parameters, the iodine value adsorption value is the main parameter of the filter adsorbent of the present invention, and can be measured by the following method. Set:

 (1) The filter adsorbent was pulverized to 200 mesh, and each flask was charged with 0.5 g of adsorbent, 50 ml of iodine solution, shaken for 15 minutes, allowed to stand for 3 minutes, and poured into a filter bottle (filtered on a triangular flask) ). Filter out the stock solution.

 (2) In addition, take a triangular flask, add 50ml of distilled water, and add 10ml of the original solution to the flask to shake.

 (3) Titrate with sodium thiosulfate. When the liquid in the flask becomes pale yellow, add black to the indicator, then add sodium thiosulfate until it is colorless. Record the amount of sodium thiosulfate added. .

 (4) Formula for calculating iodine adsorption value - 5 (VC1—VC2) X 127

 N= 0. 5

 V, - concentration of sodium thiosulfate

 C, consumption of sodium thiosulfate

V ₂ iodine concentration (0.1)

C ₂ — 10

 5, 127 - constant

 0. 5—Filtering the weight of the adsorbent In the present invention, it was found by visual observation that the obtained filter adsorbent was a semi-coke filter adsorbent. Such semi-coke filter adsorbents are primarily controlled by processing temperatures (fire). The semi-coke activation of the present invention is mainly for the purpose of obtaining large pores and mesopores of the filter adsorbent obtained, and is suitable for industrial wastewater and urban sewage treatment. The invention will now be described in more detail by way of examples, but the invention is by no means limited to these examples. The invention may be variously modified, modified, replaced, etc. without departing from the spirit and scope of the invention. Example 1

 The raw material for preparing the filter adsorbent is long flame coal (Shenmu bituminous coal). Long flame coal (Shenmu bituminous coal) has high volatile matter, low ash content and high reactivity. Therefore, a higher specific surface area filter adsorbent can be obtained at a lower activation temperature, but the yield of the filter adsorbent is low.

Long-flame coal (Shenmu bituminous coal) is crushed by crushing equipment and sieved by screening equipment to produce raw materials with a particle size of < 10 _m . The processed material was warmed to 120~150'C and then heated to 400'C at a rate of 4'C/min. Following Continue to increase the temperature to 580 ° C at a rate of 6-8 ° C / min, then constant temperature for 50 minutes, the raw materials are carbonized and carbonized; continue to increase the temperature to 860 ° C at a rate of 6-10 ° C / min, when the temperature rises to At 800 °C, steam activation is carried out first, and after 10 minutes, it is activated by flue gas. The water vapor (saturation) consumption is 3 tons/ton of coal, and the ratio of flue gas to steam is 1:5. The activation time is 50 minutes, and the reaction activation temperature is 800-860 °C.

 The flue gas is flue gas generated mainly from the combustion of fuel (gas, natural gas) in the preparation of a filter sorbent device (for example, a rotary semi-coke filter sorbent processing unit).

 Table 1 shows the treatment of the chloric acid washing wastewater in the pharmaceutical factory by the filtration adsorbent prepared in Example 1, and the CODcr (saturation) experiment was removed. The experiment used a container with a diameter of 100mm, a height of 300诵 and a volume of 650ml. The upper part of the container is a water inlet, the lower part has a water outlet of 5mm in diameter, and the water outlet is covered by a 30-mesh metal or nylon mesh. The filter adsorption material is ground and sieved. 300 g of filter adsorbent with a diameter of less than 3 mm is placed in the container, and the amount of water added to the container is added to the container from the water inlet of the container (C0D205, 000mg/l). Recorded, after all the water added is discharged, take the water sample to test the COD of the water, and record the test results. The COD content of the raw water is subtracted from the COD content of the effluent, and then the amount of water added is multiplied. The amount of C0D removed by adding water. When the effluent C0D is close to the original water C0D value, the experiment can be stopped. The amount of C0D removed each time is added together, which is the C0D saturated filtration adsorption amount of the adsorbent for the wastewater.

 It can be seen from Table 1 that the filtered adsorbent prepared by the method has a high filtration adsorption rate, and the filtration adsorption rate of the chemical oxygen demand (CODcr) in the pharmaceutical wastewater reaches 3.69 g/g, which can be used for Handle pharmaceutical wastewater.

Table 2 is a process for treating papermaking wastewater by using the filter adsorbent prepared in Example 1, and removing (CODcr) (saturation) experiment. It can be seen from Table 2 that the filter adsorbent prepared by the method has a high filtration adsorption rate, and is suitable for papermaking. The chemical oxygen demand (CODcr) in the wastewater has a filtration adsorption rate of 0. 348 g / g, which can be used to treat papermaking wastewater. The experiment uses a container with a diameter of 100 mm, a height of 300 mm and a volume of 650 ml. The upper part of the container is a water inlet, the lower part has a water outlet of 5 mm in diameter, and the water outlet is covered by a 30-mesh metal or nylon mesh. The filtered adsorbent is ground and sieved to size. 250 grams of filter adsorbent less than 3 is put into the container, and the measuring cup is used to add papermaking wastewater from the water inlet of the container to the container, and the number of times of water addition, C0D content and water volume are recorded, and all the water to be added is added. After the outflow, take the water sample to test the COD of the water, and record the test results, subtract the C0D content of the effluent from the C0D content of the raw water, and multiply the amount of water added, which is the amount of C0D removed by the water addition. When the effluent C0D is close to the raw water C0D value, the experiment can be stopped. The amount of COD removed each time is added together, that is, the adsorption adsorption amount of the adsorption adsorbent for the COD of the wastewater is saturated. Example 2

 The raw material for preparing the filter adsorbent is (Jincheng) anthracite. (Jincheng) anthracite has low volatile matter, high ash content and low reaction activity. Therefore, compared with Changyan coal (Shenmu bituminous coal), the activation reaction temperature is high, and the filtered adsorbent has a lower specific surface area, but the filtered adsorbent yield is high.

 The (Jincheng) anthracite coal is crushed by crushing equipment and sieved by screening equipment to produce raw materials with a particle size of <10. The processed material is transferred to a drying, drying and carbonization apparatus for drying and charring. The drying temperature was 150 ° C, and after the raw materials were dried, the temperature was raised to 350 ° C at a rate of 4 to 6 C/min. Continue to raise the temperature to 650'C at a rate of 6~8'C/min, then keep the temperature constant for 40 minutes, and then dry and carbonize the raw materials; continue to increase the temperature to 950 °C at a rate of 8~10'C/min, at a temperature of 800. 'C is steam and flue gas activated, steam (saturation) consumption is 1 ton / ton of coal, the ratio of flue gas to steam is 1: 5, activation time is 20 minutes, activation temperature is 800~950 °C.

 The flue gas is flue gas produced during combustion of fuel (coal, gas, natural gas) mainly from a steam boiler that supplies steam for the filtration of adsorbent equipment.

 The steam is produced and supplied by a steam boiler and is superheated steam.

 The main parameters of the filtered adsorbent prepared in Example 2:

Methylene blue adsorption value: 63mg / _g

 Ash: 15%

 Filling density 463g/l

 Iodine adsorption value: 360mg/g

 Specific surface area: 334m7g

 Filtered adsorbent yield: 500kg / ton of coal

 Chemical oxygen demand (CODcr) Adsorption capacity: <800mg/g

 Table 3 is the experimental record of treating the paper mill wastewater by using the filter adsorbent prepared in Example 2. It can be seen from Table 3 that the chemical oxygen demand (CODcr) in the wastewater is removed when the filter adsorbent prepared by the method is used to treat the papermaking wastewater. The average of the 5-day rate is 93%. Can be used to treat papermaking wastewater.

The experiment uses a filter adsorption unit (a wastewater treatment device invented by the company, patent number ZL 2004 1 0050470. 5). The unit is 4 meters wide, 6 meters long and 4 meters high. The unit has 6 units, each unit. The upper box has a square structure, and the lower box has an inverted tapered structure. The lower end of each unit of the tapered box has a discharge opening, and the discharge opening is provided with a sealing cover; the upper end of each unit square box is provided Feeding port, the feeding port is equipped with a sealing cover. The lower part of each unit is equipped with a water inlet pipe, and the upper part is equipped with a water branch pipe. The water inlet pipe of each unit is connected with the water inlet pipe of the unit, and the water outlet pipe of each unit Connected to the mains of the unit, the mains and water The water outlet of the pump is connected. 20 tons of filtered adsorbent was added from the feed port to each unit of the unit. The start-up water pump transports the papermaking wastewater into each unit of the unit through the influent main pipe and the influent branch pipe, and the waste water passes through the filtered adsorbent, and enters the outlet branch pipe and the outlet pipe. The flow rate was 20 tons/hour, and the water sample was taken twice a day for testing, and the test results were recorded. Example 3

 The (Jincheng) anthracite coal is crushed by crushing equipment and sieved by screening equipment to produce raw materials with a particle size of <10nun. The processed raw materials are conveyed to a drying and carbonization carbonization apparatus for drying and carbonization. The drying temperature was 135 ° C, and after the raw materials were dried, the temperature was raised to 380 ° C at a rate of 4 to 6 C/min. Continue to increase the temperature to 580 ° C at a rate of 6 ~ 8 ° C / min, then constant temperature for 55 minutes, the raw materials are carbonized and carbonized; continue to increase the temperature to 870 ° C at a rate of 8 ~ 10 ° C / min, when the temperature rises to At 800 ,, steam and flue gas activation, steam (saturation) consumption of 2 tons / ton of coal, flue gas to steam ratio of 1: 5, activation time of 40 minutes, activation reaction temperature of 800 ~ 870 ° C.

 The flue gas is flue gas generated during combustion of fuel (gas, natural gas) mainly from equipment for preparing a filter adsorbent (for example, a rotary semi-coke filter adsorbent processing unit).

 The steam is produced and supplied by a steam boiler and is superheated steam.

 The main parameters of the filtered adsorbent prepared in Example 3 - methylene blue adsorption value: 42 mg / g

 Ash: 9. 5%

 Filling density 400g/l

 Iodine adsorption value: 260mg/g

 Specific surface area: 200m g

 Filter adsorbent yield: 450kg / ton of coal

 Chemical oxygen demand (COD) Adsorption capacity: 200 mg/g Example 4

 Preparation of filtered adsorbent

The raw material for preparing the semi-coke filter adsorbent is long flame coal (Shenmu bituminous coal). Long flame coal (Shenmu bituminous coal) has high volatile matter, low ash content and high reactivity. Therefore, a semi-coke filter adsorbent with a higher specific surface area can be obtained at a lower activation temperature, but the yield of the semi-coke filter adsorbent is low. Long-flame coal (Shenmu bituminous coal) is crushed by crushing equipment and sieved by screening equipment to produce raw materials with a particle size of <10. The processed raw materials are conveyed to a drying and carbonization carbonization apparatus for drying and carbonization. Drying temperature is

At 120 ° C, the material was dried and heated to 400 ° C at a rate of 4 to 6 ° C / min. Continue to raise the temperature to 520 ° C at a rate of 6 to 8 'C / minute, and then keep the temperature for 70 minutes to dry and carbonize the raw materials; continue to heat up to 800 ° C at a rate of 8 ~ 10 ° C / minute, when the temperature rises At 800'C, steam activation, steam (saturation) consumption of 3 tons / ton of coal, activation time of 60 minutes, activation reaction temperature of 800 ° (:.

 The steam is produced and supplied by a steam boiler and is saturated steam.

 The main parameters of the semi-coke filter adsorbent prepared in Example 1 are as follows:

 Methylene blue adsorption value: 82mg/g

 Ash: 11.9%

 Filling density: 496g/l

 Iodine adsorption value: 720mg/g

Specific surface area: 676m ² /g

 Filter adsorbent yield: 400kg / ton of coal

Chemical oxygen demand (COD) Adsorption capacity: <3, 000 mg/g

Effluent CODcr treated water volume CODcr. removal amount CODcr adsorption capacity CODcr removal rate

 Mg/L liter % %

1 39100 0.6 99.5 33.2 81%

2 79500 0.6 75.3 25.1 61%

3 101000 0.6 62.4 20.8 51%

4 78200 0.6 76.1 25.4 62%

5 106000 0.6 59.4 19.8 48%

6 61600 0.6 86.0 28.7 70%

7 102000 0.75 77.3 25.8 50%

8 44800 1.1 176.2 58.7 78%

9 48000 1.2 188.4 63 77%

10 125000 1.2 96.0 32 39%

11 119000 1.3 111.8 37 42% Total 9.15 1, 108.4 369

 1. 300 g filter adsorption material for test

2. Original (in) water chemical oxygen demand (CODcr): 205, 000rag/l

Table 2:

Note: 250 g filter adsorbent is used in the test.

table 3 :

Note: The above experiment used a small filter adsorption unit to add 20 tons of filtered adsorbent and 480 tons of wastewater per day.

Claims

Rights request A method for preparing a filter adsorbent for water treatment, comprising:  The coalaceous raw material having a particle diameter of less than 10 is heated to 120-150'C, and then heated to 350-400 °C at a rate of 4 ° C - 6 ° C / min, and the raw material is dried and subjected to dry distillation;  Continue to ramp to 510-650 ° C at a rate of 6-8 ° C / min, constant temperature 40-70 minutes, the feedstock is carbonized and charred;  Continue to increase the temperature to 800-950'C at a rate of 6-1 / TC, and activate the reaction by one or both of steam and flue gas when the temperature reaches 800 ,, wherein the steam consumption The amount is 0. 51~3 tons/ton of raw material, the ratio of the flue gas to the steam is 1:5 or 0, the activation time is 20-60 minutes, and the reaction activation temperature is 800-950'C.  2. The production method according to claim 1, wherein the one or both activations of the vapor and the flue gas when the temperature is raised to 800 ° C comprises: simultaneously introducing steam and flue gas for activation. Happening.  3. The preparation method according to claim 1, wherein one or both of the 800'C introduction of steam and flue gas activation when the temperature is raised comprises: first introducing steam activation, and then introducing the smoke. The situation of road activation.  4. The preparation method according to claim 1, wherein one or both of the 800'C inlet steam and the flue gas activation when the temperature is raised includes first steam activation, and then steam at the same time. And the activation of the flue gas.  The preparation method according to claim 1, wherein the one or both of the introduction of the vapor and the flue gas activation when the temperature is raised to 800 ° C includes the case where only steam is activated.  6. The production method according to claim 1, wherein the steam is produced and supplied by a steam boiler, and is saturated steam or superheated steam.  The production method according to any one of claims 1 to 5, wherein the steam is water vapor.  8. The production method according to claim 1, wherein the flue gas is mainly composed of carbon dioxide, carbon monoxide, sulfur dioxide, nitrogen, and water vapor, and the flue gas is derived from a fuel combustion process of filtering the adsorbent to prepare a heating device. The flue gas produced, or the flue gas produced during the combustion of the fuel to a steam boiler that supplies steam within the filter sorbent preparation plant. 9. The production method according to claim 1, wherein the coal raw material is anthracite, lean coal, lean coal, coking coal, fat coal, gas coal, long flame coal, lignite, coke, basket charcoal or/and coke . 10. A filter adsorption material prepared by the preparation method according to claim 1, which is a semi-coke filter adsorbent, and the main parameters thereof are as follows - methylene blue adsorption value: 30 to 85 mg/g  Ash: 8~15%  Filling density: 200~550g/l  Iodine adsorption value: 260~720mg/g  Specific surface area: 200~600m7g  Filter adsorbent yield: 400kg~600kg/ton coal  Chemical oxygen demand (COD) Adsorption capacity: 200~3, 000mg/g.  A coal-mass filter adsorbent for water treatment, which is a semi-coke filter adsorbent, and the main parameters thereof are as follows:  Methylene blue adsorption value: 30~85mg/g  Ash: 8~15%  Filling density: 200~550g/l  Iodine adsorption value: 260~720mg/g  Specific surface area: 200~600m7g  Filtered adsorbent yield: 400kg~600kg/ton of coal  Chemical oxygen demand (COD) Adsorption capacity: 200~3, 000mg/g.