CN113636627A - Device and method for removing thallium pollution in wastewater - Google Patents
Device and method for removing thallium pollution in wastewater Download PDFInfo
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- CN113636627A CN113636627A CN202111195350.4A CN202111195350A CN113636627A CN 113636627 A CN113636627 A CN 113636627A CN 202111195350 A CN202111195350 A CN 202111195350A CN 113636627 A CN113636627 A CN 113636627A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46119—Cleaning the electrodes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
The invention discloses a device and a method for deeply removing thallium pollution in wastewater, the device comprises a reaction device groove which is connected in parallel, an anode and a cathode are arranged in the reaction device groove, a direct-current power supply is arranged outside the reaction device groove, the anode of the direct-current power supply is electrically connected with the anode, and the cathode of the direct-current power supply is electrically connected with the cathode; the filler of the anode is scrap iron, and the material of the cathode is a sintered metal powder filter element; the upper part and the lower part of the reaction device groove are respectively provided with a water outlet pipeline and a water inlet pipeline, and the water outlet pipeline is connected with the cathode. Through electrochemical coupling reaction, residual thallium in the wastewater and Fe (OH) generated after anode scrap iron are electrified and oxidized3Coagulation and coagulation reactions are carried out to form alum blossom precipitate, and the alum blossom precipitate are finally precipitated and cloudyThe residual thallium in the waste water can be stably removed by the dual functions of ultra-filtration of the pole metal powder filter element.
Description
Technical Field
The invention belongs to the technical field of industrial wastewater treatment, and particularly relates to a device and a method for removing thallium pollution in wastewater.
Background
Thallium (Tl, thalliuliulium) is located in the third main group of the sixth period of the periodic table of the elements, atomic number: 81; atomic weight: 204.383, respectively; symbol of element: tl; the general valency: +1, + 3. Thallium metal appears bluish white to silvery white. Thallium (Tl) is one of the most toxic rare metal elements, is second in toxicity to methylmercury, and is one of the 13 preferred metal contaminants selected by the us EPA. Thallium is a rare heavy metal element widely used in the industries of optics, medicine, aerospace and the like. Thallium is often associated with other metal minerals, so that the exploitation and utilization of thallium-containing minerals by human beings are promoted to promote the migration of thallium in the environment, and the thallium-containing minerals can be transmitted to human bodies through food chains after being enriched by passive plants and become potential killers for human health. Thallium pollution events occurring in recent years pose great threats to human health and ecological environment safety. Particularly, the situation that thallium is discharged in an excessive way is often accompanied in the wastewater generated in desulfurization procedures of the nonferrous mining industry and the ferrous metallurgy industry.
After thallium pollution events occur, the technology and application for removing thallium in water are emphasized. In recent years, various environmental standards related to thallium emission have been established successively by ecological environment governing departments at all levels of China, and strict regulations on thallium emission limits are made. The national standard "discharge Standard of pollutants for inorganic chemical industry" (GB 31573-2015) stipulates that the total thallium discharge limit value of the industry of inorganic compounds related to thallium, zinc, copper and lead is 0.005 mg/L; the standard for thallium pollutant emission of industrial wastewater of the landmark "thallium pollutant emission Standard" in Guangdong province (DB 44/1989-2017) specifies that the total thallium emission limit value is 0.002 mg/L; the discharge limit of thallium pollutant in the wastewater discharge port of workshops or production facilities is 0.002mg/L as stipulated by the discharge standard of thallium pollutant in wastewater of iron and steel industry of the landmark 'Jiangsu province'. In 12/21/2020, a modification order of the discharge standard of water pollutants in the iron and steel industry (GB 13456-; the total thallium emission limit value of a wastewater discharge outlet of a steel non-united workshop or a production facility only with a sintering (pelletizing) process is 0.006 mg/L.
Currently, the most widely used thallium removal techniques include natural cleaning, coagulation, adsorption, ion exchange, neutralization, and recycling. The wastewater discharged by thallium-discharging industrial enterprises has complex water quality, is mostly acidic, contains more toxic substances and has serious environmental pollution. Its treatment can be divided into two main categories: the first kind, thallium in a dissolved state in the sewage is converted into insoluble heavy metal compounds, and the insoluble heavy metal compounds are removed from the sewage through a precipitation and floating method; and secondly, thallium in the sewage is concentrated and separated under the condition of not changing the chemical form of the thallium, and the specific methods include a reverse osmosis method, an electrodialysis method, an evaporation concentration method and the like.
The common advanced wastewater treatment methods mainly comprise catalytic ozonation, membrane separation, chemical oxidation and the like. In recent years, electrochemical technology is also gradually applied to the field of advanced wastewater treatment. In recent years, because the electrochemical method has small occupied area, flexible operation and small discharge capacity, the electrochemical method can treat not only inorganic pollutants, but also organic pollutants, even some toxic organic matters which cannot be biodegraded and certain heavy metal-containing sewage can be treated by the method, and the electric energy cost is reduced due to the vigorous development and popularization and application of new power generation technologies such as wind power, nuclear power and the like, so that the electrochemical method is more and more widely applied to the aspect of treating waste water.
Disclosure of Invention
The invention aims to provide a device and a method for removing thallium pollution in wastewater, which can solve the problems and have the advantages of low operation cost, high removal efficiency, simple structure and convenient operation.
In order to achieve the aim, the invention provides a device for removing thallium pollution in wastewater, which comprises two reaction device tanks connected in parallel, wherein an anode and a cathode are arranged in each reaction device tank, a direct-current power supply is arranged outside each reaction device tank, the anode of the direct-current power supply is electrically connected with the anode, and the cathode of the direct-current power supply is electrically connected with the cathode; the filler of the anode is scrap iron, and the material of the cathode is a sintered metal powder filter element; the upper part and the lower part of the reaction device groove are respectively provided with a water outlet pipeline and a water inlet pipeline, and the water outlet pipeline is connected with the cathode.
Further, the negative pole is provided with two sets of sintering metal powder filter core subassemblies, and every group includes 6 sintering metal powder filter cores, and the interval of sintering metal powder filter core is 10 mm.
Furthermore, the middle part and the bottom of the sintered metal powder filter element are provided with filter element clamping grooves.
Further, the water outlet pipeline is provided with a water outlet and a suction pump.
Further, the anode comprises an iron scrap groove net and waste iron scrap filled in the iron scrap groove net, a groove net fixing groove is formed in the bottom of the iron scrap groove net, and the filling height of the waste iron scrap is 16.7% -66.7% of the height of the iron scrap groove net.
Furthermore, the bottom of the reaction device groove is also provided with an emptying pipe and a sludge discharge pipe.
The method for removing thallium pollution in wastewater by adopting the device comprises the following steps:
(1) connecting two reaction device tanks in parallel, putting thallium-containing wastewater into the reaction device tanks from a water inlet pipeline of one reaction device tank, opening a direct-current power switch, and removing thallium through electrochemical coupling reaction;
(2) pumping and discharging the wastewater with thallium removed by using a suction pump, and when the water outlet pressure head is reduced to 30% of the water inlet pressure head before entering the system, adding a cleaning agent and starting a backwashing mode;
(3) and (3) after the backwashing mode is started, the other reaction device tank starts to repeat the step (1) and the step (2), and the two reaction device tanks alternately run.
In the above scheme, the electrochemical coupling reaction includes the following reactions:
and (3) anode reaction:
（1）Fe-6e→2Fe3+；
（2）Fe-4e→2Fe2+；
（3）Fe2+-e→Fe3+；
（4）2Fe3++6H2O→2Fe(OH)3+6H+；
（5）2Fe(OH)3+ organic → 2Fe (OH) organic]↓；
And (3) cathode reaction:
（6）6H2O+6e→3H2↑+6OH-。
the invention utilizes electrochemical coupling reaction to make thallium remained in the waste water and Fe (OH) produced after anode scrap iron are electrified and oxidized3After coagulation and coagulation reactions, alum blossom precipitate is formed, and finally, residual thallium in the wastewater can be stably removed through the dual functions of precipitation and ultrafiltration of the cathode metal powder filter element.
Further, the backwash mode comprises the steps of:
and closing a water inlet pipeline of the reaction device tank, emptying residual water, pumping high-pressure water into the sintered metal powder filter element from a water outlet pipeline of the reaction device tank, and emptying the treated muddy water.
The beneficial effect who adopts above-mentioned scheme is: when backwashing is started, the device stops running and residual water in the device is emptied, and a standby mode is entered (the other device enters a running mode at the same time). And (3) pumping the filter element from the water outlet of the device in a reverse direction by adopting high-pressure water (4-8 MPa), and removing pollutants attached to the inside and the surface of the filter element. And discharging the mud-water mixture mixed with the attached pollutants through an emptying pipe, namely finishing the backwashing process.
Further, the cleaning agent is an alkali cleaning agent with the density of 0.900-1.000 g/cm3The pH value is 11-13.
Furthermore, the pressure of the high-pressure water is 4-8 Mpa.
In summary, the invention has the following advantages:
1. the reaction device groove of the invention adopts a parallel connection mode, can simultaneously carry out backwashing and normal operation, and increases the working efficiency;
2. the invention utilizes electrochemical coupling reaction to make thallium remained in the waste water and Fe (OH) produced after anode scrap iron are electrified and oxidized3After coagulation and coagulation reactions, alum blossom precipitate is formed, and finally thallium remained in the wastewater is stably removed through dual functions of precipitation and ultrafiltration of a cathode metal powder filter element;
3. after electrochemical oxidation and sintering metal powder filter element coupling treatment are carried out on the thallium-containing wastewater, the treated effluent is directly pumped out by a suction pump, and a separate secondary sedimentation tank is not needed, so that the civil engineering cost can be greatly saved;
4. the thallium-containing wastewater treated by the method has thallium concentration which can be stably less than 0.002mg/L and is far lower than the requirement of the prior art on the treatment concentration of thallium-containing wastewater;
5. aiming at the defects of thallium treatment in the prior art, the invention develops the device and the method for deeply removing thallium pollution in wastewater, is used for deeply treating thallium in wastewater, and has the advantages of low operation cost, low one-time investment, high treatment effect, simple and easy process and no secondary pollution.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a bottom plan view of the apparatus of the present invention;
wherein, 1, a water inlet pipeline; 2. a direct current power supply; 3. a scrap iron groove net; 4. an anode; 5. a groove net fixing groove; 6. a cathode; 7. a filter element clamping groove; 8. a suction pump; 9. a water outlet pipeline; 10. a reaction device tank; 11. a sludge discharge pipe; 12. and (6) emptying the pipe.
Detailed Description
The principles and features of this invention are described below in conjunction with embodiments, which are included to explain the invention and not to limit the scope of the invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The invention provides a device for removing thallium pollution in wastewater, which comprises two reaction device tanks 10 connected in parallel, as shown in figure 1: an anode 4 and a cathode 6 are arranged inside the reaction device groove 10, a direct current power supply 2 is arranged outside the reaction device groove 10, the anode of the direct current power supply 2 is electrically connected with the anode 4, and the cathode of the direct current power supply 2 is electrically connected with the cathode 6; the filler of the anode 4 is scrap iron, and the material of the cathode 6 is a sintered metal powder filter element; the upper part and the lower part of the reaction device groove 10 are respectively provided with a water outlet pipeline 9 and a water inlet pipeline 1, and the water outlet pipeline 9 is connected with the cathode 6.
In a preferred embodiment of the inventionIn the example, as shown in FIG. 2, the reaction vessel 10 is made of glass fiber reinforced plastic, has a thickness of 6mm and has the following dimensions: l × B × H =600mm × 450mm × 1600 mm. Anode 4 includes the scrap iron groove net 3 that the outside set up and fills the abandonment scrap iron in scrap iron groove net 3, and scrap iron groove net 3 bottom is provided with groove net fixed slot 5, wherein: abandonment iron fillings dress is in iron fillings groove net 3, and iron fillings groove net 3's size is: l multiplied by B multiplied by H =200mm multiplied by 1200mm, the material is SS304 stainless steel. Wherein the waste scrap iron is filled, and the filling height h =800 mm. The waste scrap iron is from lathe machining waste and contains Fe2O3The granularity is 10-30 meshes, and the filling degree is 60%. Because the iron filings are sacrificial anodes, when the iron filings are consumed to h = 200-400 mm, the iron filings are supplemented to h =800 mm.
Wherein, negative pole 6 is provided with two sets of sintering metal powder filter core subassemblies, and sintering metal powder filter core subassembly top is in the same place through the pipe connection to the pipeline is connected with outlet conduit, and every group includes 6 sintering metal powder filter cores, and the interval of sintering metal powder filter core is 10 mm. The sintered metal powder filter element simultaneously plays the dual functions of an electrochemical cathode and a membrane filter. The filter core material is SS304 stainless steel, and the filter fineness: 50 nm-1 mu m, membrane tube length: 1200mm, membrane tube outside diameter: 60mm, the application range of the membrane tube is as follows: the pH value is 0-14, the temperature is less than or equal to 200 ℃, and the design pressure is less than or equal to 0.25 MPa. The waste scrap iron and the sintered metal powder filter element are purchased from other places.
In a preferred embodiment of the invention, the input power of the DC power supply 2 is 380V + -10% of AC three-phase, 50Hz \60HZ + -10%. The output power supply is a direct current voltage and current stabilizing, the voltage stabilizing precision is less than or equal to 1 percent, and the current stabilizing precision is less than or equal to 1 percent. Output voltage regulation range: the rated voltage value of 0-24V is continuously adjustable, and the output current adjusting range is as follows: the rated current value of 0-500A is continuously adjustable, and the display resolutions of the output voltage and the current are respectively 1V and 1A.
In a preferred embodiment of the invention, the outlet conduit 9 is provided with a water outlet and a suction pump 8. The effluent after the coupling treatment of the electrochemical oxidation and the sintered metal powder filter element is directly pumped out by the suction pump 8, and an independent secondary sedimentation tank is not needed, so that the civil engineering cost can be greatly saved.
An emptying pipe 12 is also arranged at the bottom of the reaction device groove 10 and is used for maintenance. A sludge discharge pipe 11 is also arranged at the bottom of the reaction device groove 10, and the generated thallium-containing sludge is discharged through the sludge discharge pipe 11 and then is subjected to harmless treatment.
The invention also provides a method for removing thallium pollution in wastewater by using the device, which comprises the following steps:
(1) connecting two reaction device tanks 10 in parallel, putting thallium-containing wastewater into the reaction device tanks 10 from a water inlet pipeline 1, turning on a switch of a direct current power supply 2, and removing thallium through electrochemical coupling reaction;
(2) pumping and discharging the wastewater with thallium removed by using a suction pump 8, and when the water outlet pressure head is reduced to 30% of the water inlet pressure head before entering the system, adding a cleaning agent and starting a backwashing mode;
(3) the backwashing mode comprises the following steps: when backwashing is started, the first reaction device tank 10 stops running and empties residual water in the first reaction device tank, and enters a standby mode, and the other reaction device tank 10 simultaneously enters an operation mode; pumping 4-8 MPa high-pressure water into the filter element from the water outlet of the device in a reverse direction, removing pollutants attached to the inside and the surface of the filter element, and discharging a mud-water mixture mixed with the attached pollutants through a discharge pipe 12 to finish a backwashing process;
(4) after the backwashing mode of the other reaction device tank 10 is finished, the operation mode is switched to be the backwashing mode, and the two parallel reaction device tanks 10 are respectively in the operation mode and the backwashing mode, so that the thallium in the wastewater can be removed.
In a preferred embodiment of the invention, the cleaning agent is an alkaline cleaning agent, the physicochemical properties of which are as follows: appearance: colorless to light yellow transparent liquid; density: 0.900 to 1.000g/cm3(ii) a pH value: 11 to 13.
In a preferred embodiment of the present invention, the operation of the reaction device tank 10 is in a batch operation mode, and the operation period is divided into 4 stages of a water inlet stage (2 h), an electrochemical oxidation stage (2 h), a suction stage (1 h) and a static precipitation stage (1 h) to complete one cycle (total 6 h), and then the next treatment cycle is started.
The using method comprises the following steps: the thallium-containing wastewater treated by the conventional method enters the reverse reaction from the water inlet pipeline 1The tank 10 should be installed. After the DC power supply 2 is electrified, the anode 4 discards Fe (OH) generated by scrap iron fillings3And the thallium in the wastewater is coagulated and condensed to form alum floc precipitate, and the alum floc precipitate is finally subjected to the dual actions of precipitation and ultrafiltration of a sintered metal powder filter element of the cathode 6, so that the thallium in the wastewater can be stably removed. The purified waste water is pumped and discharged by a suction pump 8. When the head of the discharged water is reduced to about 30% of the head of the water introduced before entering the system, the reaction tank 10 is backwashed. The reaction apparatus 10 is connected in parallel one by one. When one set of system is used for backwashing, the other set of system is switched to carry out normal operation. The operation of the reactor 10 is carried out in a batch mode. The operation period is divided into 4 stages of a water inlet stage (2 h), an electrochemical oxidation stage (2 h), a suction stage (1 h) and a static precipitation stage (1 h) to complete a cycle (total 6 h), and then the next treatment cycle is started.
Example 1
Taking the waste water obtained by 'neutralizing and coagulating sedimentation' treatment of desulfurization waste water from certain iron and steel works in Shaanxi as a water inlet sample, wherein the thallium content in the waste water in a water inlet pipeline is 0.14-0.25 mg/L. The thallium concentration in the effluent after being treated by the device and the method for removing thallium pollution in wastewater provided by the invention is shown in the following table 1.
TABLE 1 Table of thallium concentration Change in wastewater before and after treatment
As can be seen from Table 1, the thallium concentration can be stably less than 0.002mg/L after the treatment by the device and the method for removing thallium pollution in wastewater provided by the invention.
While the present invention has been described in detail with reference to the illustrated embodiments, it should not be construed as limited to the scope of the present patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (10)
1. The device for deeply removing thallium pollution in wastewater is characterized by comprising two reaction device tanks (10) which are connected in parallel, wherein an anode (4) and a cathode (6) are arranged inside the reaction device tanks (10), a direct-current power supply (2) is arranged outside the reaction device tanks (10), the anode of the direct-current power supply (2) is electrically connected with the anode (4), and the cathode of the direct-current power supply (2) is electrically connected with the cathode (6); the filler of the anode (4) is scrap iron, and the material of the cathode (6) is a sintered metal powder filter element; and a water outlet pipeline (9) and a water inlet pipeline (1) are respectively arranged above and below the reaction device groove (10), and the water outlet pipeline (9) is connected with the cathode (6).
2. The device for deeply removing thallium pollution from wastewater as claimed in claim 1, wherein the cathode (6) is provided with two sets of sintered metal powder filter elements, each set comprising 6 sintered metal powder filter elements, the sintered metal powder filter elements being spaced apart by 10 mm.
3. The apparatus for deep removal of thallium contamination of wastewater as claimed in claim 2, wherein: and filter element clamping grooves (7) are formed in the middle and at the bottom of the sintered metal powder filter element.
4. The apparatus for deep removal of thallium contamination of wastewater as claimed in claim 1, wherein: the water outlet pipeline (9) is provided with a water outlet and a suction pump (8).
5. The apparatus for deep removal of thallium contamination of wastewater as claimed in claim 1, wherein: the anode (4) comprises an iron scrap groove net (3) and waste iron scrap filled in the iron scrap groove net (3), wherein a groove net fixing groove (5) is formed in the bottom of the iron scrap groove net (3), and the filling height of the waste iron scrap is 16.7% -66.7% of the height of the iron scrap groove net (3).
6. The apparatus for deep removal of thallium contamination of wastewater as claimed in claim 1, wherein: the bottom of the reaction device groove (10) is also provided with an emptying pipe (12) and a sludge discharge pipe (11).
7. Method for removing thallium contamination in wastewater using the apparatus of any of claims 1-6, characterized by the following steps:
(1) connecting two reaction device tanks (10) in parallel, putting thallium-containing wastewater into the reaction device tank (10) from a water inlet pipeline (1) of one reaction device tank (10), turning on a switch of a direct current power supply (2), and removing thallium through electrochemical coupling reaction;
(2) pumping and discharging the wastewater with thallium removed by using a suction pump (8), and when the water outlet pressure head is reduced to 30% of the water inlet pressure head before entering the system, putting a cleaning agent and starting a backwashing mode;
(3) and (3) after the backwashing mode is started, the other reaction device tank (10) starts to repeat the step (1) and the step (2), and the two reaction device tanks (10) alternately run.
8. The method for removing thallium contamination of claim 7, wherein the detergent is an alkaline detergent with a density of 0.900-1.000 g/cm3 and a pH of 11-13.
9. The method of removing thallium contamination of claim 7 wherein the backwash mode comprises the steps of:
closing a water inlet pipeline (1) of the reaction device groove (10), emptying residual water, pumping high-pressure water into the sintered metal powder filter element from a water outlet pipeline (9) of the reaction device groove (10), and emptying the treated muddy water.
10. The method for removing thallium pollution from wastewater according to claim 9, wherein the pressure of the high-pressure water is 4 to 8 Mpa.
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