Industrial circulating cooling water biological slime dechlorination and chlorine regeneration device and method

Abstract

This invention relates to a device and method for dechlorinating and regenerating chlorine from biological slime in industrial circulating cooling water, belonging to the field of environmentally friendly treatment of byproducts from the sterilization and disinfection of circulating cooling water. The specific solution is as follows: A device for dechlorinating and regenerating chlorine from biological slime in industrial circulating cooling water includes a tank, several anode plates, several cathode plates, a power supply, and an outlet tank. The anode plates are connected in parallel and electrically connected to the negative terminal of the power supply, and the cathode plates are connected in parallel and electrically connected to the positive terminal of the power supply. The anode and cathode plates are all installed at an angle and fixed inside the tank, with the cathode plates positioned above the anode plates. The top of the tank is connected to the outlet tank, and the bottom of the tank is equipped with several sludge collection hoppers, the bottom of which are connected to sludge discharge pipes. Sludge discharge valves are installed on the sludge discharge pipes. This invention provides a complete post-treatment solution for chlorination and sterilization of circulating cooling water, filling a technological gap in the current treatment of microbial problems in circulating cooling water.

Description

Technical Field

[0001] This invention belongs to the field of environmental protection treatment of sterilization and disinfection byproducts of circulating cooling water. Specifically, it relates to a device and method for dechlorination and chlorine regeneration of biological slime after treatment of industrial circulating cooling water with chlorine-containing biocides. This method reduces the toxicity of chlorination disinfection byproducts, prevents them from polluting water sources after discharge, and recovers and reuses the chlorine, thus achieving chlorine recycling. Background Technology

[0002] Circulating cooling water originates from pretreated surface water or even greywater. Because it contains microorganisms and nutrients, circulating cooling water systems at suitable temperatures can generate large amounts of biological slime. Microorganisms mix with sediment, inorganic matter, and other substances in the water to form numerous rubbery deposits, viscous substances, gelatinous films, or colored slime clumps—collectively known as biological slime. This biological slime adheres to pipe walls, reducing the heat transfer efficiency of heat exchangers, condensers, and other equipment, increasing flow resistance, and raising energy consumption. It also accelerates the corrosion rate of metal pipes, leading to significant energy waste and economic losses for the plant.

[0003] Sodium hypochlorite is an important chemical reagent widely used in circulating cooling water systems for inhibiting and removing biological slime due to its simple production process and high economic efficiency. Sodium hypochlorite molecules dissolved in water can rapidly hydrolyze to produce hypochlorous acid and hypochlorite ions. Because the hypochlorous acid produced by hydrolysis is a neutral small molecule without positive or negative charges, it can diffuse in water to the surface of negatively charged bacteria or viruses, penetrate the surface of the bacteria or viruses, and destroy the internal proteins, thereby oxidizing the bacteria or viruses.

[0004] The sterilization and removal of biofilm generate harmful toxic chlorine byproducts that dissolve in water or combine with the removed biofilm. These byproducts mainly include chloroform, dichloromethane, trihalomethanes, 1,2-dichloroethane, 1,1,1-trichloroethane, trichloroacetaldehyde, dichloroacetic acid, trichloroacetic acid, and 2,4,6-trichlorophenol. During the separation and disposal of biofilm, these byproducts are released into the environment. These chlorine-containing byproducts can induce cancer and affect the health of the liver, kidneys, and nervous system, as well as human fertility and growth.

[0005] After microorganisms multiply rapidly, they produce a type of sticky substance, generally called extracellular polymers. These extracellular polymers adhere to various particulate matter and dissolved organic matter in the circulating cooling water, forming biofilm. Proteins and carbohydrates are the main components of biofilm. Furthermore, as microbial cells or flocculent biofilm clumps expand to a certain size, their sticky surface becomes an agglutinating surface, continuously attracting suspended solids, gravel, inorganic salts, algae, and other substances carried in the circulating cooling water. At this point, the biofilm has become a multilayered polymer containing various substances. Water quality conditions such as pH and oxidation-reduction potential (ORP) are closely related to the formation of biofilm. After chlorine-containing biocides inactivate the microorganisms in the system, the extracellular polymers in the biofilm bind chloride ions, transforming into chlorinated organic matter. Summary of the Invention

[0006] The purpose of this invention is to solve the problem that the biosludge discharged during the microbial inactivation and biosludge stripping process in circulating cooling water systems contains toxic chlorine byproducts. A method and device for catalytic electrolysis are proposed to electrochemically dechlorinate and regenerate chlorine in chlorine-containing biosludge, thereby achieving green disposal of chlorine-containing sludge, regenerating disinfectants, and reducing operating costs.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This invention designs an industrial circulating cooling water biological slime dechlorination and chlorine regeneration device, including a tank, several anode plates, several cathode plates, a power supply, and an outlet tank. The several anode plates are connected in parallel and electrically connected to the positive terminal of the power supply via wires. The several cathode plates are connected in parallel and electrically connected to the negative terminal of the power supply via wires. The several anode plates and several cathode plates are all installed at an angle and fixed inside the tank, with the several cathode plates located above the several anode plates. The top of the tank is connected to the outlet tank, and the bottom of the tank is arranged with several sludge collection hoppers. The bottom of each of the several sludge collection hoppers is connected to a sludge discharge pipe, and a sludge discharge valve is installed on the sludge discharge pipe.

[0009] Furthermore, the tilting direction of the plurality of anode plates is opposite to the tilting direction of the plurality of cathode plates.

[0010] Furthermore, the acute angle between each of the plurality of cathode plates and the horizontal plane is 55~65°, preferably 65°, and the acute angle between each of the plurality of anode plates and the horizontal plane is 55~65°, preferably 65°.

[0011] Furthermore, each of the plurality of cathode plates and anode plates is provided with a plurality of through holes, with the through holes on adjacent cathode plates being staggered and the through holes on adjacent anode plates being staggered. The shape of the through holes is one or more combinations of elongated, circular, square, and triangular shapes.

[0012] Furthermore, the pool body is provided with a water inlet channel, the inlet of which is located at the top of the pool body, and the outlet of which is located at the bottom of the pool body.

[0013] Furthermore, the cathode plate is loaded with a palladium-based catalyst, and the anode plate is made of platinum.

[0014] Furthermore, a water outlet weir is provided at the top of the pool, and the water outlet weir is connected to the water outlet trough.

[0015] Furthermore, a water outlet pipe is connected to the side wall of the water outlet tank, and a water outlet valve is installed on the water outlet pipe.

[0016] Furthermore, the angle between the slope of the sludge collection hopper and the horizontal plane is 35° to 45°, preferably 40°.

[0017] The industrial circulating cooling water biological slime dechlorination and chlorine regeneration device is divided into four areas: the water inlet pipe is the water inlet area, the area below the anode plate is the mud-water separation area, the area where the anode plate and cathode plate are located is the inclined plate electrode area, and the area above the cathode plate is the clear water area.

[0018] A method for dechlorinating and regenerating biological slime using the aforementioned industrial circulating cooling water biological slime dechlorination and chlorine regeneration device includes the following steps: Biological slime peeled off from the circulating cooling water system and the circulating cooling water after slime peeling flow together from the inlet of the inlet channel into the bottom of the tank and enter the mud-water separation zone. The water flows upward, first passing through the anode plate and then through the cathode plate. After the biological slime settles on the surfaces of the anode and cathode plates, it flows downward into the sludge collection hopper at the bottom of the tank. The clear water after sedimentation flows into the outlet tank. When the biological slime comes into contact with the electrode surface, an electrode reaction occurs. An oxidative decomposition reaction occurs at the anode plate, breaking the covalent bonds and hydrogen bonds between the extracellular polymers of the biological slime. Simultaneously, the voltage acts on the electric double layer between the sticky molecules, disrupting the van der Waals forces and electrostatic forces between the chlorine-containing proteins, polysaccharides, nucleic acids, and other macromolecules in the extracellular polymers, destroying the intermolecular forces on the interface layer, and breaking down the common binding membrane, thus reducing the viscosity between the various molecular groups of the biological slime and dispersing the slime. A reduction dechlorination reaction occurs at the cathode plate, and the H+ in the solution... + Alternatively, H2O gains electrons on the surface of the Pd catalyst to form H2O. ads (Bound hydrogen), while chlorinated organic pollutants (R-Cl) in the solution are activated by adsorption on the surface of Pd, H ads R-Cl reacts with the catalyst on the Pd surface to generate the corresponding dechlorination products and HCl, and then the reaction products are desorbed from the catalyst surface. This converts chlorine from a bound state to a free state of Cl. -It returns to the liquid phase with HCl, thus reducing the toxicity of disinfection byproducts and achieving a chlorine removal rate of 95% for chlorinated organic matter. Cl entering the water... - An oxidation reaction occurs at the anode plate, resulting in the loss of electrons to generate chlorine gas. The chlorine gas dissolves in water to form hypochlorous acid and hydrochloric acid, thus achieving the reuse of chloride ions. During this process, the valence state of chlorine changes from +1 in the disinfectant to -1 after disinfection, then to zero, and finally back to +1, realizing the chlorine cycle. The dispersed and detoxified biological slime flows into the sludge-water separation zone, enters the sludge collection hopper, and is discharged into the circulating cooling water system through the sludge outlet pipe. This allows for the recycling and reuse of the biological slime. The water flows upwards towards the clear water zone, flows through the outlet weir into the outlet tank, and is discharged into the circulating cooling water system through the outlet pipe. The Cl in the water... - HCl and HClO also enter the circulating cooling water system at the same time, realizing the recovery and reuse of chlorine, and increasing the residual chlorine from ≤2mg / L before treatment to ≥10mg / L.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. Dispersing large clumps of biological slime to prevent pipe blockage. In this invention, the biological slime containing large clumps after microbial disinfection treatment enters the biological slime dechlorination and chlorine regeneration device along with the circulating cooling water. Electrolysis is used to break the covalent and hydrogen bonds between the polysaccharides, proteins, nucleic acids, and other macromolecules in the extracellular polymeric components of the biological slime. Simultaneously, the surface voltage of the anode plate disrupts the van der Waals forces and electrostatic forces between the chlorine-containing proteins, polysaccharides, nucleic acids, and other macromolecules in the extracellular polymeric components, thus achieving the dispersion of the biological slime. This reduces secondary pollution of the water body by chemical dispersants, and even if a small amount of dispersed biological slime remains, it will not block the pipes when re-entering the circulating cooling water system.

[0021] 2. Solid-liquid separation of bio-sludge and circulating cooling water. In this invention, after the bio-sludge is dispersed and detoxified, inclined staggered perforated electrode plates are used. This not only prevents bio-sludge from depositing on the electrode plate surface but also separates the solid phase to the sludge collection hopper, achieving solid-liquid phase separation of mud and water. Simultaneously, it allows for the recycling and reuse of the bio-sludge. The staggered perforations of the electrode plates enhance fluid disturbance and reflux between the electrodes, improving mass transfer; they also increase turbulence intensity, ensuring that generated ions leave the electrode plate gaps promptly and reducing electrode passivation.

[0022] 3. Remove disinfection byproducts from the circulating cooling water system. By electrolyzing a palladium-based catalyst supported on the cathode, the C-Cl bonds of chlorine-containing organic compounds in the disinfection byproducts are broken, thereby reducing the toxicity of the disinfection byproducts and preventing them from flowing into the environment and polluting water bodies, thus preventing harm to human and animal health.

[0023] 4. Chlorine is recovered and reused, reducing the addition of biocides. After electrolysis, the breaking of the C-Cl bond allows chloride ions to return to the circulating cooling water system, increasing the effective chlorine content in the system. - Chlorine gas is generated through anodizing. The chlorine gas dissolves in water to form hypochlorous acid and hydrochloric acid, which are the effective components of chlorine-containing biocides, reducing the amount of biocides added and realizing the recycling of chloride ions.

[0024] 5. This invention provides a complete and comprehensive post-treatment solution for chlorination disinfection of circulating cooling water, addressing the problem of biological slime removal after circulating cooling water is removed. It fills a technological gap in the current treatment of microbial problems in circulating cooling water. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main structure of the device of the present invention;

[0026] Figure 2 A schematic diagram of the electrode plate opening structure;

[0027] Figure 3 This is a schematic diagram of the second electrode plate opening structure;

[0028] In the diagram: 1. Pool body, 2. Anode plate, 3. Cathode plate, 4. Power supply, 5. Water outlet tank, 6. Sludge collection hopper, 7. Sludge discharge valve, 8. Through hole, 9. Water inlet channel, 10. Water outlet weir, 11. Water outlet pipe, 12. Water outlet valve, 13. Sludge discharge pipe, 14. Wire, 91. Inlet, 92. Outlet. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Specific Implementation Method 1

[0031] This invention provides a device and method for dechlorinating and regenerating chlorine from biological slime after treatment with a chlorine-containing biocide in industrial circulating cooling water. The device is as follows: Figure 1 As shown, the opening structure of the electrode plate is as follows Figure 2 As shown, the opening structure of the electrode plate is as follows: Figure 3 As shown, the opening structures and positions of adjacent electrode plates are different. Specifically:

[0032] The pool body 1 is uncovered and made of Q235 steel, with its inner and outer surfaces coated with anti-corrosion paint. The inclined plate electrode area includes a cathode plate 3 and an anode plate 2. The cathode plate 3 is made of rough foamed nickel, supported on a palladium-based catalyst, with a cathode potential of -1.1V. The anode plate 2 is made of platinum. The distance between the cathode plate 3 and the anode plate 2 is 0.15m. The acute angle between the cathode plate 3, the anode plate 2, and the horizontal plane is 65°. The angle between the slope of the sludge collection hopper and the horizontal plane is 40°.

[0033] Anodic reaction: The chemical reaction equation for the breaking of covalent bonds (mainly peptide bonds) is:

[0034] R-CO-NH-R + H2O→ R-CO-OH + H-NH-R

[0035] The reaction equation for hydrogen bond breaking is:

[0036] XH…OY→X-H+OY

[0037] The equation for the chloride ion oxidation reaction is:

[0038] Cl - +2e - →Cl2↑

[0039] The chemical equation for the dissolution of chlorine in water:

[0040] Cl₂ + H₂O → HClO + HCl

[0041] Where R is a group containing a benzene ring, and X and Y represent different or the same non-metallic atoms such as F, O, and N, which have high electronegativity and small atomic radii.

[0042] An electrolytic catalytic oxidation reaction occurs on the surface of the platinum electrode, breaking the covalent and hydrogen bonds between the extracellular polymers of the biofilm. At the same time, the voltage generated on the electrode surface acts on the electric double layer between the sticky molecules, disrupting the van der Waals forces and electrostatic forces between macromolecules such as chlorine-containing proteins, polysaccharides, and nucleic acids in the extracellular polymers, destroying the intermolecular forces between pairs of molecules on the interface layer, and breaking down the common binding membrane between chlorine-containing organic molecules. This reduces the stickiness between the various molecular groups of the biofilm, thereby dispersing the slime.

[0043] The cathode plate 3 is made of rough nickel foam (RNF). The nickel foam has a three-dimensional network structure, which can accelerate the proton mass transfer step in the hydrogen evolution reaction (HER). A cathode catalyst is supported on the nickel foam.

[0044] The cathode catalyst is a palladium-based catalyst. Pd has empty d orbitals and d electrons, readily combining with hydrogen atoms to form Pd-H bonds. In the electrochemical reduction dechlorination reaction, H… ads(Adsorbed hydrogen) is unstable on the catalyst electrode surface; it can react with H+. + and electrons, or H ads The complex reaction between the two produces H2, leading to the hydrogen evolution reaction, which reduces the efficiency of electron utilization in electrochemical reduction dechlorination. Therefore, using the catalyst Pd improves the cathode's efficiency for H2 production. ads The adsorption capacity of Pd directly enhances the dechlorination rate and current efficiency of electrochemical reduction. Theoretically, Pd can adsorb approximately 1000 times its own volume of hydrogen at room temperature and pressure. The chemical equation is H... + +Pd+e - ←→(H) ads Pd.

[0045] The chemical reaction equations for the dechlorination and hydrogen evolution reactions occurring on the cathode plate 3 are as follows, where R is a group containing a benzene ring.

[0046] H + +Pd+e - →(H) ads Pd

[0047] H2O+e - +Pd→(H) ads Pd+OH -

[0048] R-Cl + Pd → (R-Cl) ads Pd

[0049] (R-Cl) ads Pd+(H) ads Pd+e - →(RH) ads Pd+(Cl - ) ads Pd

[0050] (R-Cl) ads Pd+2(H) ads Pd→(RH) ads Pd+ (H-Cl) ads Pd

[0051] (RH) ads Pd→(RH)+Pd

[0052] (Cl - ) ads Pd→Cl - +Pd

[0053] (H-Cl) ads Pd→(H-Cl)+Pd

[0054] (H)ads Pd+(H) ads Pd→H2+Pd

[0055] (H) ads Pd+e - +H + →H2+Pd

[0056] The specific reaction process is as follows: H in the solution + Alternatively, H2O gains electrons on the surface of the Pd catalyst to form H2O. ads Simultaneously, chlorophenolic organic pollutants (R-Cl) in the solution are activated by adsorption on the surface of Pd, H ads R-Cl reacts with Pd on the catalyst surface to generate the corresponding dechlorination products and HCl, and then the reaction products are desorbed from the catalyst surface. Simultaneously, H... ads The combination between or H ads With H + It reacts with electrons to produce H2.

[0057] Electrode arrangement: The vertical spacing between the electrode plates is 0.15m, with cathode plate 3 at the top and anode plate 2 at the bottom. The acute angle between the electrode plates and the horizontal plane is 65°. This arrangement improves reaction efficiency, prevents biofilm from adhering to the electrode surface, and maximizes reaction time. The electrodes are perforated, with two perforation structures, such as... Figure 2 and Figure 3 As shown, electrodes with two perforated structures are placed alternately. Compared to non-perforated electrodes, this electrode arrangement can enhance the turbulence and backflow of the fluid between the electrodes, thus enhancing the mass transfer between the electrode plates; it also enhances the turbulence intensity between the electrode plates, allowing the generated ions to leave the gap between the electrode plates in a timely manner, reducing electrode passivation. The cathode plate 3 and the anode plate 2 are connected in parallel and connected to the power supply via wire 14.

[0058] The inlet 91 of the water inlet channel 9 is located above the pool body 1. The water flows down from top to bottom and enters the mud-water separation zone below. This increases the water pressure entering the pool body 1, increases the flow rate, and promotes the flow of water.

[0059] A method for dechlorinating and regenerating chlorine from biological slime after treatment with a chlorine-containing biocide in industrial circulating cooling water includes the following steps:

[0060] Step 1: Install an industrial circulating cooling water biological slime dechlorination and chlorine regeneration device in the circulating cooling water system.

[0061] Step 2: Fix the inclined plate electrode anode plate 2 and cathode plate 3 in the pool body 1 and connect them in parallel to the power supply 4.

[0062] Step 3: Circulating cooling water flows into the tank 1 through inlet 91 of the water inlet channel 9 and enters the mud-water separation zone. The water flows from bottom to top through the inclined plate electrode zone and enters the clear water zone. After the biological slime is dispersed and dechlorinated on the surface of the inclined plate electrode, it slides down into the sludge collection hopper 6.

[0063] Step 4: Collect the dispersed and detoxified biological slime in the sludge discharge pipe 13 for recycling and reuse.

[0064] Step 5: Connect the outlet pipe 11 to the circulating cooling water system. The treated circulating cooling water, free of biological slime, continues to participate in the circulation, while the recovered chloride ions continue to play a bactericidal role in the system.

[0065] Furthermore, the method for preparing the rough foamed nickel electrode of the cathode plate 3 is as follows: the treated foamed nickel electrode is used as the cathode, the pure cobalt sheet is used as the anode, and the electrolyte is 0.2 mol·L⁻¹. -1 CoCl2 and 4 mol·L -1 A mixed NH4Cl solution was subjected to a constant current density of 0.2 A·cm⁻¹ controlled by a DC power supply. -2 The reaction was carried out for 400 seconds to prepare a rough nickel foam electrode.

[0066] Furthermore, the method for preparing the foamed nickel electrode is as follows: first, the foamed nickel substrate is cut into 4m×2m×0.01m electrode sheets, and then ultrasonically immersed in 10% H2SO4 solution for 25 minutes to remove the oxide layer on the surface. Then, it is ultrasonically immersed in anhydrous ethanol and deionized water for 10 minutes in sequence to remove organic matter on the surface. Finally, it is dried with high-purity nitrogen gas.

[0067] Furthermore, the palladium-based catalyst supported on the cathode plate 3 is prepared by electrochemical deposition. Specifically, the electrochemical deposition method involves placing a cleaned nickel foam electrode and the catalyst solution into a 32°C constant-temperature shaker, setting the shaking frequency to 150 times / minute, reacting until the solution becomes colorless, and then removing the electrode and rinsing it repeatedly with deionized water. A three-electrode system single-chamber reactor is used, with the pretreated nickel foam electrode as the working electrode, and the platinum sheet and saturated calomel electrode as the counter and reference electrodes, respectively. The entire electrodeposition apparatus is placed in a 25°C low-temperature constant-temperature bath for constant-potential electrodeposition. The cathode potential is −2.00 V, and the electrodeposition time is 20 min.

[0068] Further, the palladium-based catalyst is prepared by adding 105 mg PVP, 60 mg ascorbic acid, 185 mg KCl, 5 mg NaBr, and 8 mg water to a three-necked flask under reflux conditions, heating to 80 °C and maintaining the temperature for 15 min, then rapidly adding 3 mL of a 20 mg / mL Na₂PdCl₄ aqueous solution to the three-necked flask, stirring for 3 hours to stop the reaction, and obtaining a colloidal solution containing PdNCs (palladium nanoclusters). The colloidal solution is poured into a centrifuge tube and cooled to room temperature, then washed four times sequentially with acetone, ethanol, and n-hexane, and finally diluted with water to 20 mL to obtain the diluted colloidal solution, i.e., the catalyst solution, which is then sealed and stored.

[0069] Furthermore, the anode plate is prepared by first cutting a platinum substrate into 4m×2m×0.01m electrode sheets, immersing them in a 10% H2SO4 solution and sonicating for 25 minutes to remove the oxide layer on the surface, then sonicating them in anhydrous ethanol and deionized water for 10 minutes in sequence to remove organic matter on the surface, and finally drying them with high-purity nitrogen gas.

[0070] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for dechlorinating and regenerating chlorine from biological slime in industrial circulating cooling water, characterized in that: The system includes a pool body (1), several anode plates (2), several cathode plates (3), a power supply (4), and a water outlet tank (5). The several anode plates (2) are connected in parallel and electrically connected to the positive terminal of the power supply (4). The several cathode plates (3) are connected in parallel and electrically connected to the negative terminal of the power supply (4). The several anode plates (2) and several cathode plates (3) are all installed obliquely and fixedly inside the pool body (1). The several cathode plates (3) are located vertically above the several anode plates (2), and there is a gap between the several cathode plates (3) and the several anode plates (2). The top of the pool body (1) The tank body (1) is connected to the outlet tank (5). Several sludge collection hoppers (6) are arranged at the bottom of the tank body (1). The bottom of each of the several sludge collection hoppers (6) is connected to the sludge outlet pipe (13). A sludge outlet valve (7) is provided on the sludge outlet pipe (13). Several through holes (8) are provided on each of the several cathode plates (3) and several anode plates (2). The through holes (8) on two adjacent cathode plates (3) and the through holes (8) on two adjacent anode plates (2) are staggered. The cathode plate material is nickel foam. The cathode plate (3) is loaded with a palladium-based catalyst. The anode plate (2) is made of platinum.

2. The industrial circulating cooling water biological slime dechlorination and chlorine regeneration device according to claim 1, characterized in that: The tilting direction of the plurality of anode plates (2) is opposite to the tilting direction of the plurality of cathode plates (3).

3. The industrial circulating cooling water biological slime dechlorination and chlorine regeneration device according to claim 2, characterized in that: The acute angle between each of the cathode plates (3) and the horizontal plane is 55~65°, and the acute angle between each of the anode plates (2) and the horizontal plane is 55~65°.

4. The industrial circulating cooling water biological slime dechlorination and chlorine regeneration device according to claim 1, characterized in that: The pool body (1) is provided with a water inlet channel (9), the inlet (91) of the water inlet channel (9) is located above the pool body (1), and the outlet (92) of the water inlet channel (9) is located at the bottom of the pool body (1).

5. The industrial circulating cooling water biological slime dechlorination and chlorine regeneration device according to claim 1, characterized in that: The top of the pool body (1) is provided with a water outlet weir (10), which is connected to the water outlet trough (5).

6. The industrial circulating cooling water biological slime dechlorination and chlorine regeneration device according to claim 1, characterized in that: The side wall of the water outlet tank (5) is connected to a water outlet pipe (11), and a water outlet valve (12) is provided on the water outlet pipe (11).

7. The industrial circulating cooling water biological slime dechlorination and chlorine regeneration device according to claim 1, characterized in that: The slope of the mud collection hopper (6) is at an angle of 35~45° to the horizontal plane.

8. A method for dechlorinating and regenerating biological slime using the industrial circulating cooling water biological slime dechlorination and chlorine regeneration device according to any one of claims 1-7, characterized in that, Includes the following steps: The biological slime detached from the circulating cooling water system flows into the bottom of the pool (1) together with the circulating cooling water. The water flows from bottom to top, first through the anode plate (2) and then through the cathode plate (3). After the biological slime is deposited on the anode plate (2) and the cathode plate (3), it flows from top to bottom along the inclined surface of the plate into the sludge collection hopper (6) at the bottom of the pool (1). The clear water after sedimentation flows into the outlet tank (5).

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