Zero-discharge treatment device for battery bottom guard plate production wastewater

Abstract

The invention provides a battery bottom guard plate production wastewater zero discharge treatment device, and belongs to the technical field of wastewater treatment, a coagulation stirring chamber is arranged at the bottom of an air flotation chamber, a first precipitation chamber is arranged on one side of the coagulation stirring chamber, an adjusting chamber and an oxidizing chamber are arranged on one side of the first precipitation chamber, the oxidizing chamber is arranged at the bottom of the adjusting chamber, and the air flotation chamber is arranged at the bottom of the air flotation chamber. The second precipitation chamber is arranged on one side of the oxidation chamber, the photocatalysis chamber is arranged on the top of the second precipitation chamber, the mixing chamber is arranged on one side of the second precipitation chamber and the photocatalysis chamber, the inclined anoxic chamber is arranged on the tops of the first precipitation chamber, the adjusting chamber, the photocatalysis chamber, the mixing chamber and the third precipitation chamber, and the aeration chamber is arranged on one side of the top of the inclined anoxic chamber. The filter chamber is arranged on one side of the aeration chamber, and the disinfection chamber is arranged on one side of the filter chamber. The device adopts a multi-stage oxidation technology, pollutants are thoroughly oxidized, and the efficiency is high; the degradation is diversified; the device is simple in structure, small in occupied area and convenient to install and operate; and the requirement of zero emission is met.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a zero-discharge treatment device for wastewater produced by a battery bottom guard plate. Background Art

[0002] The production process of the battery bottom guard plate mainly includes machining, pre-treatment and surface treatment. The wastewater generated in the production process mainly includes cleaning wastewater after degreasing, water washing wastewater after silanization, secondary pure water washing wastewater after electrophoresis, spray tower wastewater and boiler drainage. At present, the treatment process of battery bottom guard plate production wastewater is: comprehensive regulation + primary sedimentation + anaerobic hydrolysis + aerobic + secondary sedimentation. After the production wastewater is treated, it is connected to the sewage pipe network together with domestic sewage and sent to the urban sewage treatment plant for centralized treatment. With the improvement of environmental protection standards, it is required to reuse production wastewater after treatment. The existing technical processes cannot meet the requirements of zero emissions. Summary of the invention

[0003] The purpose of the present invention is to provide a zero-discharge treatment device for battery bottom guard plate production wastewater, which adopts multi-stage oxidation technology to completely oxidize pollutants with high efficiency; the inclined anoxic chamber provides anaerobic, anoxic and anaerobic biochemical reaction conditions, and the degradation is diversified; the device has a simple structure, a small footprint, and is easy to install and operate; the final effluent is reused in the production workshop to meet the zero-discharge requirements.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A zero-discharge treatment device for wastewater produced by battery bottom guard plates, characterized in that it includes an air flotation chamber, a coagulation and stirring chamber, a first sedimentation chamber, a regulating chamber, an oxidation chamber, a second sedimentation chamber, a photocatalytic chamber, a mixing chamber, a third sedimentation chamber, an inclined anoxic chamber, an aeration chamber, a filtration chamber and a disinfection chamber.

[0006] The coagulation and stirring chamber is arranged at the bottom of the flotation chamber, the first sedimentation chamber is arranged on one side of the coagulation and stirring chamber, the adjustment chamber and the oxidation chamber are arranged on one side of the first sedimentation chamber, the oxidation chamber is arranged at the bottom of the adjustment chamber, the second sedimentation chamber is arranged on one side of the oxidation chamber, the photocatalysis chamber is arranged at the top of the second sedimentation chamber, the mixing chamber is arranged on one side of the second sedimentation chamber and the photocatalysis chamber, the inclined anoxic chamber is arranged on the top of the first sedimentation chamber, the adjustment chamber, the photocatalysis chamber, the mixing chamber and the third sedimentation chamber, the aeration chamber is arranged on one side of the top of the inclined anoxic chamber, the filtration chamber is arranged on one side of the aeration chamber, and the disinfection chamber is arranged on one side of the filtration chamber.

[0007] Furthermore, the flotation chamber includes a water inlet pipe, an air flotation plate, a water distribution pipe, a scraper plate and a scum trough, the water inlet pipe is arranged inside the air flotation chamber, the air flotation plate is arranged in the lower middle part of the air flotation chamber, the air flotation plate is connected to the air flotation blower arranged outside the air flotation chamber through a pipeline, the water distribution pipe is arranged on the top of the air flotation plate, the water distribution pipe is connected to the water inlet pipe, the scraper plate is arranged on the top of the air flotation chamber, and the scum trough is arranged on the top of the outer side of the air flotation chamber.

[0008] The water distribution pipe is arranged in a concentric circle shape or a cross shape, a horizontal radiation water outlet is arranged on the water distribution pipe, and the air flotation plate is a microporous aeration plate with micropores evenly arranged.

[0009] Furthermore, two triangular partitions are arranged between the coagulation and mixing chamber and the flotation chamber, and the two triangular partitions are arranged relatively on the chamber wall. A coagulant addition meter is arranged on the outer chamber wall of the coagulation and mixing chamber, and the coagulant addition meter is connected to the coagulation and mixing chamber through a pipeline. The coagulant added by the coagulant addition meter is a polymerized ferric sulfate solution. A coagulation agitator is arranged inside the coagulation and mixing chamber, and an inclined bottom plate is arranged at the bottom of the coagulation and mixing chamber.

[0010] Furthermore, a sedimentation chamber baffle is arranged between the sedimentation chamber and the coagulation and mixing chamber. The sedimentation chamber baffle is arranged with a 45° turning angle, and the turning angle turns toward the coagulation and mixing chamber side. The bottom of the sedimentation chamber is designed to be a conical structure, and a sedimentation chamber discharge valve is arranged at the bottom of the sedimentation chamber.

[0011] Furthermore, the regulating chamber is provided with an acid-base measuring and controlling device, which includes a pH value measuring probe and an acid liquid metering adder. The pH value measuring probe is embedded in the inner wall of the regulating chamber, and the acid liquid metering adder is arranged on the chamber wall outside the regulating chamber. The acid liquid metering adder is connected to the regulating chamber through a pipeline. The acid-base measuring and controlling device adjusts the pH value of the wastewater to 4. The acid liquid added by the acid liquid metering adder is waste sulfuric acid or waste hydrochloric acid. A regulating chamber agitator is arranged inside the regulating chamber, and an inclined regulating chamber bottom plate is arranged at the bottom of the regulating chamber.

[0012] The oxidation chamber is provided with an oxidant adding meter and an oxidation chamber agitator, wherein the oxidant adding meter is arranged on the chamber wall outside the oxidation chamber, the oxidant adding meter is connected to the oxidation chamber through a pipeline, and the oxidation chamber agitator is arranged inside the oxidation chamber. An inclined oxidation chamber bottom plate is arranged at the bottom of the oxidation chamber, and the oxidant added by the oxidant adding meter is a hydrogen peroxide solution and an iron-carbon agent.

[0013] Furthermore, a baffle plate for the second sedimentation chamber is arranged between the second sedimentation chamber and the oxidation chamber, and the baffle plate for the second sedimentation chamber is arranged with a 45° turning angle, and the turning angle turns toward the oxidation chamber side. The bottom of the second sedimentation chamber is designed to be a conical structure, and a discharge valve for the second sedimentation chamber is arranged at the bottom of the second sedimentation chamber.

[0014] The photocatalytic chamber is provided with photocatalytic plates in an interlaced manner, the upper surfaces of the photocatalytic plates are provided with photocatalysts, and the lower surfaces of the photocatalytic plates are provided with fluorescent lamps.

[0015] Furthermore, the mixing chamber comprises a domestic sewage addition pipe and a mixing chamber agitator, the domestic sewage addition pipe and the mixing chamber agitator are both arranged inside the mixing chamber, and an inclined mixing chamber bottom plate is arranged at the bottom of the mixing chamber.

[0016] A sedimentation chamber baffle is arranged between the sedimentation chamber and the mixing chamber. The sedimentation chamber baffle is arranged with a 45° turning angle, and the turning angle turns to the mixing chamber side. The bottom of the sedimentation chamber is designed to be a conical structure, and a sedimentation chamber discharge valve is arranged at the bottom of the sedimentation chamber.

[0017] Furthermore, the top plate on one side of the inclined anoxic chamber is arranged in a convex shape, and a gas collecting pipe is arranged at the highest point of the convex shape. The top plate and the bottom plate on the other side of the inclined anoxic chamber are both inclined. As the biochemical reaction proceeds and oxygen is consumed, an anaerobic section, an anoxic section and an anaerobic section are gradually formed in the inclined anoxic chamber. An anaerobic filler basket is hung on the top plate on one side of the inclined anoxic chamber, and an anaerobic filler basket and a facultative anoxic filler basket are hung on the top plate on the other side of the inclined anoxic chamber in sequence.

[0018] Furthermore, an aeration plate is arranged at the bottom of the aeration chamber, and the aeration plate is connected to a blower arranged outside the aeration chamber through a pipeline, and the aeration plate is a microporous aeration plate with micropores uniformly arranged.

[0019] Furthermore, the filter chamber is filled with filter material, and the filter material is coarse sand.

[0020] An ultraviolet disinfection lamp is arranged inside the disinfection chamber, and a drain outlet is arranged on the top of one side of the disinfection chamber. The drain outlet is connected to a water outlet pipe, and the water discharged from the water outlet pipe is reused in the production workshop.

[0021] Advantages of the present invention:

[0022] 1. The device has a simple structure and is easy to build, install and operate;

[0023] 2. This device uses flotation and coagulation sedimentation to remove pollutants and reduce the concentration of pollutants for subsequent treatment units;

[0024] 3. This device uses Fenton oxidation, photocatalytic oxidation, anoxic biochemical oxidation, aerobic biochemical oxidation and other oxidation technologies to oxidize pollutants, with thorough oxidation and high efficiency;

[0025] 4. This device adds domestic sewage before the biochemical reaction to increase the BOD5 / COD ratio of the wastewater and provide nutrients for subsequent anoxic and aerobic reactions;

[0026] 5. The inclined anoxic chamber of the device provides facultative anoxic, anoxic and anaerobic biochemical reaction conditions, converting acetic acid, hydrogen, carbonic acid, formic acid and methanol in wastewater into methane, carbon dioxide and new cell substances;

[0027] 6. The final effluent of this device is reused to achieve zero discharge and meet higher environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] In the figure: 1, air flotation chamber, 101, water inlet pipe, 102, air flotation plate, 103, water distribution pipe, 104, scraper plate, 105, scum tank;

[0030] 2. Coagulation mixing chamber;

[0031] 3. Sedimentation chamber 1, 301, baffle plate of sedimentation chamber 1, 302, discharge valve of sedimentation chamber 1;

[0032] 4. Conditioning room;

[0033] 5. Oxidation chamber;

[0034] 6. Sedimentation chamber 2, 601. Sedimentation chamber 2 baffle, 602. Sedimentation chamber 2 discharge valve;

[0035] 7. Photocatalytic chamber, 701, photocatalytic plate;

[0036] 8. Mixing chamber, 801, domestic sewage adding pipe;

[0037] 9. Sedimentation chamber 3, 901. Sedimentation chamber 3 baffle, 902. Sedimentation chamber 3 discharge valve;

[0038] 10. inclined anoxic chamber, 1001. gas collecting pipe, 1002. facultative anoxic packing basket, 1003. anoxic packing basket, 1004. anaerobic packing basket;

[0039] 11. aeration chamber, 1101. aeration plate;

[0040] 12. Filter chamber, 1201, filter material;

[0041] 13. Disinfection room, 1301. Ultraviolet disinfection lamp, 1302. Drain. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0043] like Figure 1 As shown, a zero-discharge treatment device for wastewater produced by a battery bottom guard plate includes an air flotation chamber 1, a coagulation and stirring chamber 2, a first sedimentation chamber 3, a regulating chamber 4, an oxidation chamber 5, a second sedimentation chamber 6, a photocatalytic chamber 7, a mixing chamber 8, a third sedimentation chamber 9, an inclined anoxic chamber 10, an aeration chamber 11, a filtration chamber 12 and a disinfection chamber 13;

[0044] The coagulation and stirring chamber 2 is arranged at the bottom of the flotation chamber 1, the sedimentation chamber 3 is arranged on one side of the coagulation and stirring chamber 2, the regulating chamber 4 and the oxidation chamber 5 are arranged on one side of the sedimentation chamber 3, the oxidation chamber 5 is arranged at the bottom of the regulating chamber 4, the sedimentation chamber 6 is arranged on one side of the oxidation chamber 5, the photocatalytic chamber 7 is arranged at the top of the sedimentation chamber 6, the mixing chamber 8 is arranged on one side of the sedimentation chamber 6 and the photocatalytic chamber 7, the inclined anoxic chamber 10 is arranged on the top of the sedimentation chamber 3, the regulating chamber 4, the photocatalytic chamber 7, the mixing chamber 8 and the sedimentation chamber 9, the aeration chamber 11 is arranged on one side of the top of the inclined anoxic chamber 10, the filtration chamber 12 is arranged on one side of the aeration chamber 11, and the disinfection chamber 13 is arranged on one side of the filtration chamber 12.

[0045] As a preferred embodiment of the present invention, the flotation chamber 1 includes a water inlet pipe 101, an air flotation plate 102, a water distribution pipe 103, a scraper plate 104 and a scum trough 105, the water inlet pipe 101 is arranged inside the air flotation chamber 1, the air flotation plate 102 is arranged in the middle and lower part of the air flotation chamber 1, the air flotation plate 102 is connected to the air flotation blower arranged outside the air flotation chamber 1 through a pipeline, the water distribution pipe 103 is arranged on the top of the air flotation plate 102, the water distribution pipe 103 is connected to the water inlet pipe 101, the scraper plate 104 is arranged on the top of the air flotation chamber 1, and the scum trough 105 is arranged on the top of the outer side of the air flotation chamber 1.

[0046] The water distribution pipe 103 is configured in a concentric circle shape or a cross shape, and a horizontal radiation water outlet is provided on the water distribution pipe 103, which can achieve a better effect of wastewater treatment.

[0047] The flotation plate 102 is a microporous aeration plate evenly provided with micropores, and the flotation chamber 1 is used for flotation to remove suspended solids in the wastewater whose density is less than or equal to the density of water.

[0048] As a preferred embodiment of the present invention, two triangular partitions are arranged between the coagulation and mixing chamber 2 and the flotation chamber 1. The two triangular partitions are arranged relatively on the chamber wall. The two triangular partitions play an isolation role to avoid mutual interference between the coagulation and mixing chamber 2 and the flotation chamber 1.

[0049] A coagulant addition meter is arranged on the outer wall of the coagulation and stirring chamber 2, and the coagulant addition meter is connected to the coagulation and stirring chamber 2 through a pipeline. The coagulant added by the coagulant addition meter is a polyferric sulfate solution. A coagulation agitator is arranged inside the coagulation and stirring chamber 2, and an inclined bottom plate is arranged at the bottom of the coagulation and stirring chamber 2. The water after coagulation and stirring flows into the sedimentation chamber 3 along the inclined bottom plate.

[0050] As a preferred embodiment of the present invention, a sedimentation chamber baffle 301 is arranged between the sedimentation chamber 3 and the coagulation mixing chamber 2. The sedimentation chamber baffle 301 is provided with a 45° turning angle, which turns toward the coagulation mixing chamber 2 side. The bottom of the sedimentation chamber 3 is designed to be a conical structure, and a sedimentation chamber discharge valve 302 is arranged at the bottom of the sedimentation chamber 3.

[0051] As a preferred embodiment of the present invention, the regulating chamber 4 is provided with an acid-base measuring and controlling device, and the acid-base measuring and controlling device includes a pH value measuring probe and an acid liquid metering adder. The pH value measuring probe is embedded in the inner wall of the regulating chamber 4, and the acid liquid metering adder is arranged on the chamber wall outside the regulating chamber 4. The acid liquid metering adder is connected to the regulating chamber 4 through a pipeline. The acid-base measuring and controlling device adjusts the pH value of the wastewater to 4. The acid liquid added by the acid liquid metering adder is waste sulfuric acid or waste hydrochloric acid. A regulating chamber agitator is arranged inside the regulating chamber 4, and an inclined regulating chamber bottom plate is arranged at the bottom of the regulating chamber 4.

[0052] The oxidation chamber 5 is provided with an oxidant addition meter and an oxidation chamber agitator, wherein the oxidant addition meter is arranged on the chamber wall outside the oxidation chamber 5, the oxidant addition meter is connected to the oxidation chamber 5 through a pipeline, and the oxidation chamber agitator is arranged inside the oxidation chamber 5. An inclined oxidation chamber bottom plate is arranged at the bottom of the oxidation chamber 5, and the stirred water flows into the second precipitation chamber 6 along the inclined oxidation chamber bottom plate.

[0053] The oxidants added by the oxidant adding meter are hydrogen peroxide solution and iron-carbon agent, and the preparation process of the iron-carbon agent is as follows: 1) repeatedly washing the activated carbon with deionized water until there is no turbidity; 2) soaking in distilled water for 12 to 36 hours; 3) drying at 105 to 110° C. for 12 to 36 hours; 4) soaking the dried activated carbon in a solution of ferrous sulfate for 4 to 12 hours; 5) filtering and drying at 105 to 110° C. for 12 to 36 hours; 6) transferring to a muffle furnace and calcining at 400 to 650° C. for 4 to 18 hours to obtain the iron-carbon agent.

[0054] As a preferred embodiment of the present invention, a baffle plate 601 for the second sedimentation chamber is arranged between the second sedimentation chamber 6 and the oxidation chamber 5. The baffle plate 601 for the second sedimentation chamber is arranged with a 45° turning angle, and the turning angle turns toward the oxidation chamber 5 side. The bottom of the second sedimentation chamber 6 is designed to be a conical structure, and a discharge valve 602 for the second sedimentation chamber is arranged at the bottom of the second sedimentation chamber 6.

[0055] The photocatalytic chamber 7 is provided with photocatalytic plates 701 in an interlaced manner. The upper surface of the photocatalytic plate 701 is provided with a photocatalyst, and the lower surface of the photocatalytic plate 701 is installed with a fluorescent lamp.

[0056] The photocatalyst provided on the upper surface of the photocatalytic plate 701 is prepared in the following steps:

[0057] Step 1: First, ferric chloride hexahydrate, fumaric acid and DMF were thoroughly mixed in a 100 mL polytetrafluoroethylene liner. After stirring at room temperature for 1 h, the mixture was heated at 100 ° C for 12 h. The resulting precipitate was centrifuged and washed with DMF and ethanol three times, and finally dried at 60 ° C for 12 h to obtain MIL-88A (Fe).

[0058] Step 2: Dissolve bismuth nitrate pentahydrate in ethylene glycol. Bismuth nitrate pentahydrate was completely dissolved by mechanical stirring and ultrasound, respectively. Then a certain amount of potassium bromide was added to the transparent colorless solution, and deionized water was added during mechanical stirring, and stirred until potassium bromide was completely dissolved to react to generate BiOBr. MIL-88A (Fe) powder was placed in the solution in different mass ratios, stirred for 3 hours until the powder was completely dissolved, and reacted at 140 ° C for 8 hours. After cooling to room temperature, it was washed 3 times with alcohol and deionized water. The sample was dried at 70 ° C for 12 hours to obtain a photocatalyst.

[0059] In step 1, the molar mass ratio of ferric chloride hexahydrate to fumaric acid is 1:1.

[0060] In step 2, the molar mass ratio of bismuth nitrate pentahydrate to potassium bromide is 1:2.

[0061] In step 2, the mass ratio of added MIL-88A(Fe) to BiOBr is 7:100.

[0062] As a preferred embodiment of the present invention, the mixing chamber 8 includes a domestic sewage addition pipe 801 and a mixing chamber agitator, and the domestic sewage addition pipe 801 and the mixing chamber agitator are both arranged inside the mixing chamber 8. An inclined mixing chamber bottom plate is provided at the bottom of the mixing chamber 8, and the stirred water flows into the sedimentation chamber 3 9 along the inclined mixing chamber bottom plate.

[0063] A sedimentation chamber baffle plate 901 is arranged between the sedimentation chamber 9 and the mixing chamber 8. The sedimentation chamber baffle plate 901 is arranged with a 45° turning angle, and the turning angle turns to the mixing chamber 8 side. The bottom of the sedimentation chamber 9 is designed to be a conical structure, and a sedimentation chamber discharge valve 902 is arranged at the bottom of the sedimentation chamber 9.

[0064] As a preferred embodiment of the present invention, the top plate on one side of the inclined anoxic chamber 10 is arranged in a convex shape, and a gas collecting pipe 1001 is arranged at the highest point of the convex shape. The top plate and the bottom plate on the other side of the inclined anoxic chamber 10 are both inclined, which is convenient for the precipitation and aggregation of solid matter, and also for the aggregation and recycling of methane gas.

[0065] As the biochemical reaction proceeds and oxygen is consumed, an anaerobic section, an anoxic section and an anaerobic section are gradually formed in the inclined anoxic chamber 10. An anaerobic filler basket 1004 is hung on the top plate on one side of the inclined anoxic chamber 10, and an anoxic filler basket 1003 and an anaerobic filler basket 1002 are hung in sequence on the top plate on the other side of the inclined anoxic chamber 10.

[0066] As a preferred embodiment of the present invention, an aeration plate 1101 is disposed at the bottom of the aeration chamber 11, and the aeration plate 1101 is connected to a blower disposed outside the aeration chamber through a pipeline. The aeration plate 1101 is a microporous aeration plate with micropores uniformly disposed thereon.

[0067] As a preferred embodiment of the present invention, the filter chamber 12 is filled with filter material 1201, and the filter material 1201 is coarse sand;

[0068] The water filtered by the filter chamber 12 enters the disinfection chamber 13, and an ultraviolet disinfection lamp 1301 is arranged inside the disinfection chamber 13. A drain outlet 1302 is arranged on the top of one side of the disinfection chamber 13, and the drain outlet 1302 is connected to a water outlet pipe. The water discharged from the water outlet pipe is reused in the production workshop.

[0069] The working principle and specific process of the present invention:

[0070] 1) The wastewater from the production of the battery bottom guard plate enters the flotation chamber 1 through the water inlet pipe 101, and the flotation plate 102 generates a large number of fine bubbles. The bubbles and suspended matter adhere to form scum, which rises to the water surface under the action of buoyancy, and the scum is discharged through the scraper plate 104 and the scum tank 105. The flotation chamber 1 removes suspended pollutants in the wastewater whose density is less than or equal to the density of water.

[0071] 2) Then the wastewater enters the coagulation and stirring chamber 2, the coagulant adding meter adds coagulant, the coagulation agitator stirs the water, and the water undergoes a coagulation reaction; the solid matter sinks to the lower part of the sedimentation chamber 3 under the action of gravity and is discharged through the sedimentation chamber discharge valve 302.

[0072] 3) The water after precipitation and separation enters the regulating chamber 4, the acid metering feeder adds waste hydrochloric acid, and the agitator in the regulating chamber stirs and mixes the water to adjust the pH value of the wastewater to 4.

[0073] 4) Then the water enters the oxidation chamber 5, the oxidant adding meter adds hydrogen peroxide solution and iron-carbon agent, the oxidation chamber agitator stirs and mixes the water, and the active sites on the surface of the iron-carbon agent catalyze the decomposition of hydrogen peroxide to produce ·OH, which has strong oxidizing properties, and the pollutants in the wastewater are oxidized and decomposed. The wastewater after oxidation and decomposition enters the second sedimentation chamber 6, and the solids sink to the lower part of the second sedimentation chamber 6 under the action of gravity and are discharged through the second sedimentation chamber discharge valve 602 at the bottom; the discharged iron-carbon agent is dehydrated, dried, and regenerated for recycling.

[0074] 5) Then the wastewater enters the photocatalytic chamber 7, where the photocatalyst absorbs light to generate a photocatalytic reaction, and the pollutants are further oxidized and decomposed. The wastewater enters the mixing chamber 8, and the domestic sewage adding pipe 801 adds domestic sewage to increase the BOD5 / COD ratio of the wastewater, providing nutrients for subsequent anoxic and aerobic reactions. The mixing chamber agitator stirs and mixes the water. The solid matter in the mixed wastewater sinks to the lower part of the sedimentation chamber 9 under the action of gravity and is discharged through the sedimentation chamber discharge valve 902.

[0075] 6) After the wastewater enters the inclined anoxic chamber 10, it rises along the top and bottom plates of the inclined anoxic chamber 10, and passes through the facultative anoxic section, the anoxic section and the anaerobic section in turn. The microorganisms on the filler of the inclined anoxic chamber are in full contact with the organic matter in the wastewater. The facultative bacteria in the facultative anoxic section and the heterotrophic bacteria in the anoxic section and the anaerobic section decompose the macromolecular organic matter in the wastewater into small molecular organic matter, and convert the insoluble organic matter into soluble organic matter. The gas collecting pipe 1001 at the top of the inclined anoxic chamber collects the generated methane gas for recycling. The aged bacterial blocks that fall off the filler of the inclined anoxic chamber sink into the sedimentation chamber 3 under the action of gravity and are discharged through the sedimentation chamber 3 discharge valve 902.

[0076] 7) The water treated by the tilted anoxic chamber 10 enters the aeration chamber 11, and the aeration disk 1101 generates a large number of fine oxygen bubbles, which produce the biochemical effect of activated sludge, and the pollutants in the water are biochemically decomposed.

[0077] 8) The water after aeration and oxidation treatment enters the filter chamber 12, and the filter material 1201 filters the water.

[0078] 9) The water filtered by the filter chamber 12 enters the disinfection chamber 13, and the ultraviolet disinfection lamp 1301 disinfects the water. The disinfected water is discharged through the outlet pipe and reused in the production workshop to achieve the goal of zero discharge.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can still adjust the technical solutions described in the above embodiments or replace some of the technical features by equivalents. Therefore, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A zero-discharge treatment device for wastewater from battery bottom guard plate production, characterized in that: It comprises an air flotation chamber (1), a coagulation and stirring chamber (2), a first sedimentation chamber (3), a regulating chamber (4), an oxidation chamber (5), a second sedimentation chamber (6), a photocatalytic chamber (7), a mixing chamber (8), a third sedimentation chamber (9), an inclined anoxic chamber (10), an aeration chamber (11), a filtering chamber (12) and a disinfection chamber (13); The coagulation and stirring chamber (2) is arranged at the bottom of the flotation chamber (1); the first sedimentation chamber (3) is arranged on one side of the coagulation and stirring chamber (2); the adjustment chamber (4) and the oxidation chamber (5) are arranged on one side of the first sedimentation chamber (3); the oxidation chamber (5) is arranged at the bottom of the adjustment chamber (4); the second sedimentation chamber (6) is arranged on one side of the oxidation chamber (5); the photocatalytic chamber (7) is arranged on the top of the second sedimentation chamber (6); the mixing chamber (8) is arranged on one side of the second sedimentation chamber (6) and the photocatalytic chamber (7); the inclined anoxic chamber (10) is arranged on the top of the first sedimentation chamber (3), the adjustment chamber (4), the photocatalytic chamber (7), the mixing chamber (8) and the third sedimentation chamber (9); the aeration chamber (11) is arranged on one side of the top of the inclined anoxic chamber (10); the filtration chamber (12) is arranged on one side of the aeration chamber (11); and the disinfection chamber (13) is arranged on one side of the filtration chamber (12).

2. A zero-discharge treatment device for wastewater from production of battery bottom guard plates according to claim 1, characterized in that: The air flotation chamber (1) comprises a water inlet pipe (101), an air flotation plate (102), a water distribution pipe (103), a scraper plate (104) and a scum groove (105); the water inlet pipe (101) is arranged inside the air flotation chamber (1); the air flotation plate (102) is arranged at the middle and lower part of the air flotation chamber (1); the air flotation plate (102) is connected to an air flotation blower arranged outside the air flotation chamber (1) through a pipeline; the water distribution pipe (103) is arranged at the top of the air flotation plate (102); the water distribution pipe (103) is connected to the water inlet pipe (101); the scraper plate (104) is arranged at the top of the air flotation chamber (1); and the scum groove (105) is arranged at the top of the outer side of the air flotation chamber (1); The water distribution pipe (103) is arranged in a concentric circle shape or a cross shape, and a horizontal radiation water outlet is arranged on the water distribution pipe (103). The air flotation plate (102) is a microporous aeration plate with micropores evenly arranged thereon.

3. A zero-discharge treatment device for wastewater from production of battery bottom guard plates according to claim 2, characterized in that: Two triangular partitions are arranged between the coagulation and stirring chamber (2) and the flotation chamber (1), and the two triangular partitions are arranged on the chamber wall opposite to each other. A coagulant addition meter is arranged on the outer chamber wall of the coagulation and stirring chamber (2), and the coagulant addition meter is connected to the coagulation and stirring chamber (2) through a pipeline. The coagulant added by the coagulant addition meter is a polymerized ferric sulfate solution. A coagulation agitator is arranged inside the coagulation and stirring chamber (2), and an inclined bottom plate is arranged at the bottom of the coagulation and stirring chamber (2).

4. A zero-discharge treatment device for wastewater from production of battery bottom guard plates according to claim 3, characterized in that: A settling chamber baffle plate (301) is provided between the settling chamber (3) and the coagulation and stirring chamber (2); the settling chamber baffle plate (301) is provided with a 45° turning angle, the turning angle being turned toward the coagulation and stirring chamber (2); the bottom of the settling chamber (3) is designed to be a conical structure; and a settling chamber discharge valve (302) is provided at the bottom of the settling chamber (3).

5. A zero-discharge treatment device for wastewater from production of battery bottom guard plates according to claim 4, characterized in that: The regulating chamber (4) is provided with an acid-base measuring and controlling device, the acid-base measuring and controlling device comprising a pH value measuring probe and an acid liquid metering doser, the pH value measuring probe being embedded on the inner wall of the regulating chamber (4), the acid liquid metering doser being arranged on the chamber wall outside the regulating chamber (4), the acid liquid metering doser being connected to the regulating chamber (4) via a pipeline, the acid-base measuring and controlling device regulating the pH value of the waste water to be 4, the acid liquid added by the acid liquid metering doser being waste sulfuric acid or waste hydrochloric acid, the regulating chamber (4) being provided with a regulating chamber agitator inside, and the bottom of the regulating chamber (4) being provided with an inclined regulating chamber bottom plate; The oxidation chamber (5) is provided with an oxidant adding meter and an oxidation chamber agitator, wherein the oxidant adding meter is arranged on the chamber wall outside the oxidation chamber (5), the oxidant adding meter is connected to the oxidation chamber (5) through a pipeline, and the oxidation chamber agitator is arranged inside the oxidation chamber (5). An inclined oxidation chamber bottom plate is arranged at the bottom of the oxidation chamber (5), and the oxidant added by the oxidant adding meter is a hydrogen peroxide solution and an iron-carbon agent.

6. A zero-discharge treatment device for wastewater from production of battery bottom guard plates according to claim 5, characterized in that: A second sedimentation chamber baffle plate (601) is provided between the second sedimentation chamber (6) and the oxidation chamber (5); the second sedimentation chamber baffle plate (601) is provided with a 45° turning angle, the turning angle is turned toward the oxidation chamber (5); the bottom of the second sedimentation chamber (6) is designed to be a conical structure; and a second sedimentation chamber discharge valve (602) is provided at the bottom of the second sedimentation chamber (6); Photocatalytic plates (701) are arranged in a staggered manner inside the photocatalytic chamber (7), a photocatalyst is arranged on the upper surface of the photocatalytic plate (701), and a fluorescent lamp is installed on the lower surface of the photocatalytic plate (701).

7. A zero-discharge treatment device for wastewater from production of battery bottom guard plates according to claim 6, characterized in that: The mixing chamber (8) comprises a domestic sewage addition pipe (801) and a mixing chamber agitator, wherein the domestic sewage addition pipe (801) and the mixing chamber agitator are both arranged inside the mixing chamber (8), and an inclined mixing chamber bottom plate is arranged at the bottom of the mixing chamber (8); A settling chamber baffle plate (901) is provided between the settling chamber (9) and the mixing chamber (8); the settling chamber baffle plate (901) is provided with a 45° turning angle, the turning angle being turned toward the mixing chamber (8); the bottom of the settling chamber (9) is designed to be a conical structure; and a settling chamber discharge valve (902) is provided at the bottom of the settling chamber (9).

8. A zero-discharge treatment device for wastewater from production of battery bottom guard plates according to claim 7, characterized in that: The top plate on one side of the inclined anoxic chamber (10) is arranged in a convex shape, and a gas collecting pipe (1001) is arranged at the highest point of the convex shape. The top plate and the bottom plate on the other side of the inclined anoxic chamber (10) are both inclined. As the biochemical reaction proceeds and oxygen is consumed, an anaerobic section, an anoxic section and an anaerobic section are gradually formed in the inclined anoxic chamber (10). An anaerobic filler basket (1004) is hung on the top plate on one side of the inclined anoxic chamber (10), and an anaerobic filler basket (1003) and a facultative anoxic filler basket (1002) are hung in sequence on the top plate on the other side of the inclined anoxic chamber (10).

9. A zero-discharge treatment device for wastewater from production of battery bottom guard plates according to claim 8, characterized in that: An aeration plate (1101) is arranged at the bottom of the aeration chamber (11), and the aeration plate (1101) is connected to a blower arranged outside the aeration chamber through a pipeline. The aeration plate (1101) is a microporous aeration plate with micropores evenly arranged.

10. A zero-discharge treatment device for wastewater from production of battery bottom guard plates according to claim 9, characterized in that: The filter chamber (12) is filled with filter material (1201), and the filter material (1201) is coarse sand; An ultraviolet disinfection lamp (1301) is arranged inside the disinfection chamber (13), and a drain outlet (1302) is arranged on the top of one side of the disinfection chamber (13). The drain outlet (1302) is connected to a water outlet pipe, and the water discharged from the water outlet pipe is reused in the production workshop.

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