Battery material production sewage recycling system

Abstract

The utility model discloses a battery material production sewage recycling system, which comprises a production line slurry iron removal unit which generates sewage in an iron removal process; the first water tank collects sewage through the first pneumatic diaphragm pump, and the sewage flows into the second water tank after being preliminarily filtered by the plate frame cloth bag filter. Then, the ceramic pump conveys the sewage to an iron removal machine to remove magnetic substances, and the treated sewage is stored in a third water tank; then, the sewage is fed into a bag filter filled with activated carbon by a second pneumatic diaphragm pump to adsorb organic matters, the sewage is further filtered by a tube sieve filtering assembly, and the primarily purified sewage is stored in a water storage tank in a workshop. And finally, the water in the storage tank is conveyed back to the production line slurry iron removal unit by the constant-pressure pump, so that sewage recycling is realized. The system can effectively remove sewage impurities, meet the water demand of workshop production, and reduce the environmental protection pressure and the water cost of a workshop.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a system for recycling and reusing wastewater generated during the battery material production process, especially in the slurry section of lithium iron phosphate production. Background Technology

[0002] Currently, in the battery material production process, the electromagnetic iron removal equipment in the lithium iron phosphate slurry stage is a crucial step in ensuring product quality. However, the wastewater treatment problems generated in this stage are becoming increasingly prominent.

[0003] First, the wastewater discharge is large and the treatment methods are limited: Due to the large number of electromagnetic iron removal devices in the lithium iron phosphate production slurry section, a huge amount of wastewater is generated during equipment cleaning. Currently, most of this wastewater is discharged directly after only simple treatment, without forming an effective wastewater recycling system. This not only wastes a large amount of water resources but also puts significant pressure on the ecological environment.

[0004] Secondly, production costs are high: electromagnetic iron removal equipment requires frequent cleaning, resulting in a huge demand for water resources. However, due to the lack of a wastewater recycling system, companies have to continuously use fresh water for equipment cleaning, which undoubtedly increases their water costs significantly and reduces their competitiveness in the market.

[0005] Third, existing treatment methods have shortcomings: the current method for treating wastewater after cleaning with electromagnetic iron removal equipment in workshops typically involves first passing it through plate and frame filters, permanent magnet separators, and precision filters, and then diluting it with a large amount of concentrated water at a 1:10 ratio before discharge. This treatment method not only consumes a large amount of energy and material resources, but the discharged wastewater may still pollute the environment, which is inconsistent with the concept of green and sustainable development. Utility Model Content

[0006] The purpose of this utility model is to provide a wastewater recycling system for battery material production, which effectively removes various impurities from the wastewater, enabling the treated wastewater to meet the production requirements of the workshop, realizing the recycling of wastewater, and thus reducing the environmental pressure of wastewater treatment and the water cost of the workshop.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A battery material production wastewater recycling system, comprising:

[0008] The production line slurry iron removal unit is used in the iron removal process of slurry during battery material production, generating wastewater that needs to be treated.

[0009] The first water tank is connected to the production line slurry iron removal unit via the first pneumatic diaphragm pump and is used to collect the wastewater generated by the production line slurry iron removal unit.

[0010] The plate and frame bag filter is connected to the pipeline of the first water tank and is used for preliminary filtration of sewage in the first water tank to remove large particulate impurities;

[0011] The second water tank, connected to the plate and frame bag filter pipeline, is used to store the wastewater filtered by the plate and frame bag filter.

[0012] A ceramic pump connects the second water tank to the iron removal machine, used to transport wastewater from the second water tank to the iron removal machine;

[0013] The iron removal machine, connected to the second water tank via a ceramic pump, is used to remove magnetic substances from wastewater;

[0014] The third water tank is connected to the iron removal machine pipeline and is used to store the wastewater after the iron removal machine has treated it.

[0015] The bag filter is connected to the third water tank via a second pneumatic diaphragm pump. The bag filter is filled with activated carbon to adsorb organic matter in the wastewater.

[0016] Tube screen filter assembly, connected to bag filter pipeline, is used to filter wastewater;

[0017] The workshop wastewater storage tank is connected to the pipe screen filter assembly and is used to store the pre-purified wastewater after it has been treated by the pipe screen filter assembly.

[0018] The constant pressure pump connects the workshop's water storage tank to the production line's slurry iron removal unit, and is used to transport water from the workshop's water storage tank to the production line's slurry iron removal unit to realize the recycling of wastewater.

[0019] As a preferred embodiment of a wastewater recycling system for battery material production, the tube screen filter assembly includes at least one 0.1µm wire-wound cotton core tube screen filter, at least one 0.05µm meltblown filter core tube screen filter, and at least one 0.01µm meltblown filter core tube screen filter.

[0020] As a preferred solution for the wastewater recycling system in battery material production, a secondary filtration device is provided between the workshop water storage tank and the production line slurry iron removal unit. The secondary filtration device includes a 0.03µm meltblown filter element and a 0.01µm pleated filter element.

[0021] As a preferred solution for the wastewater recycling system in battery material production, the water storage tank in the workshop is equipped with a liquid level monitoring sensor, which is connected to the control systems of the constant pressure pump, the first pneumatic diaphragm pump, and the second pneumatic diaphragm pump.

[0022] As a preferred solution for the wastewater recycling system in battery material production, both the tube screen filtration assembly and the secondary filtration device are equipped with pressure monitoring sensors.

[0023] As a preferred solution for the wastewater recycling system in battery material production, the production line slurry iron removal unit is equipped with a water inlet and a water supply outlet.

[0024] As a preferred solution for the wastewater recycling system in battery material production, a pretreatment component consisting of several sequentially connected tube screen iron removal devices and tube screen filtration devices is provided between the plate and frame bag filter and the second water tank to remove iron impurities and filter the wastewater.

[0025] The beneficial effects of this utility model are as follows: it realizes the recycling of wastewater, greatly reduces the total amount of wastewater discharge, effectively reduces the degree of environmental pollution, and greatly alleviates environmental protection pressure; the recycling of wastewater significantly reduces the enterprise's use of fresh water resources, significantly reduces the water cost of the workshop, improves the enterprise's economic benefits, and enhances the enterprise's competitiveness in the market; the wastewater treated by this system through multiple filtration and impurity removal processes has extremely low impurity content, and when used for cleaning electromagnetic iron removal equipment, it will not have any negative impact on the equipment and product quality, effectively ensuring the stability of the production process and the reliability of product quality. Attached Figure Description

[0026] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0027] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0028] Figure 1 This is a schematic diagram of a wastewater recycling system for battery material production provided in an embodiment of this utility model.

[0029] In the diagram, 1. Production line slurry iron removal unit; 2. First water tank; 3-1. First pneumatic diaphragm pump; 4. Plate and frame bag filter; 5. Second water tank; 6. Ceramic pump; 7. Iron removal machine; 8. Third water tank; 3-2. Second pneumatic diaphragm pump; 9. Bag filter; 10. Tube screen filter assembly; 11. Workshop wastewater storage tank; 12. Constant pressure pump; 13. Secondary filtration device; 1-1. Water inlet; 1-2. Water inlet; 14. Tube screen iron removal device; 15. Tube screen filter device. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0032] See Figure 1 This utility model provides a system for recycling and reusing wastewater from battery material production, comprising:

[0033] Production line slurry iron removal unit 1 is used for the iron removal process of slurry in the battery material production process, generating wastewater to be treated;

[0034] The first water tank 2 is connected to the production line slurry iron removal unit 1 via the first pneumatic diaphragm pump 3-1, and is used to collect the wastewater generated by the production line slurry iron removal unit 1.

[0035] The plate and frame bag filter 4 is connected to the pipeline of the first water tank 2 and is used to perform preliminary filtration of the sewage in the first water tank 2 to remove large particulate impurities.

[0036] The second water tank 5 is connected to the plate and frame bag filter 4 by a pipeline and is used to store the wastewater filtered by the plate and frame bag filter 4.

[0037] Ceramic pump 6 connects the second water tank 5 and the iron removal machine 7, and is used to transport the sewage in the second water tank 5 to the iron removal machine 7.

[0038] The iron removal machine 7 is connected to the second water tank 5 via a ceramic pump 6 and is used to remove magnetic substances from the sewage.

[0039] The third water tank 8 is connected to the pipe of the iron removal machine 7 and is used to store the wastewater treated by the iron removal machine 7.

[0040] The bag filter 9 is connected to the third water tank 8 via the second pneumatic diaphragm pump 3-2. The bag filter 9 is filled with activated carbon to adsorb organic matter in the sewage.

[0041] The tube screen filter assembly 10 is connected to the bag filter 9 via a pipeline and is used to filter wastewater;

[0042] The workshop water storage tank 11 is connected to the tube screen filter assembly 10 by a pipeline and is used to store the pre-purified wastewater after being treated by the tube screen filter assembly 10.

[0043] The constant pressure pump 12 connects the workshop water storage tank 11 to the production line slurry iron removal unit 1, and is used to transport water from the workshop water storage tank 11 to the production line slurry iron removal unit 1 to realize the recycling of wastewater.

[0044] Specifically, the slurry iron removal unit 1 in the production line is used for the iron removal process of the slurry during battery material production, generating wastewater to be treated. During battery material production, magnetic impurities may be mixed into the slurry. The slurry iron removal unit 1 utilizes electromagnetic principles to generate a magnetic field that adsorbs magnetic substances in the slurry, achieving the purpose of iron removal and ensuring the quality of the battery materials. During the iron removal process, impurities will adhere to the surface of the equipment, requiring regular cleaning. The wastewater generated during cleaning is the wastewater to be treated.

[0045] Specifically, the first water tank 2 is connected to the production line slurry iron removal unit 1 via the first pneumatic diaphragm pump 3-1, and is used to collect the wastewater generated by the production line slurry iron removal unit 1. When operating, the first pneumatic diaphragm pump 3-1 uses compressed air as power to pump the wastewater generated by the production line slurry iron removal unit 1 into the first water tank 2. The first water tank 2 serves as a temporary storage tank for wastewater, providing a stable water supply for subsequent wastewater treatment and preventing the intermittent discharge of wastewater from affecting subsequent treatment processes.

[0046] Specifically, the plate and frame bag filter 4 is connected to the first water tank 2 via a pipeline and is used for preliminary filtration of the wastewater in the first water tank 2 to remove large particulate impurities. The plate and frame bag filter 4 consists of plates and frames and filter bags. When wastewater enters the filter, the plates and frames, through compression, intercept large particulate impurities in the wastewater, such as solid particles and fibers, between the plates and frames or on the surface of the filter bags. The filter bags have a certain filtration precision and can effectively block large particulate matter, significantly reducing the content of large particulate impurities in the pre-filtered wastewater and reducing the burden on subsequent treatment equipment.

[0047] Specifically, the second water tank 5 is connected to the plate and frame bag filter 4 via a pipeline and is used to store the wastewater filtered by the plate and frame bag filter 4. The wastewater that has undergone preliminary filtration by the plate and frame bag filter 4 flows into the second water tank 5, which serves as an intermediate storage container to provide a buffer for subsequent treatment processes. It can balance the wastewater flow rate and ensure that the subsequent treatment equipment can operate stably without being affected by fluctuations in wastewater flow.

[0048] Specifically, the ceramic pump 6 connects the second water tank 5 and the iron separator 7, and is used to transport the sewage in the second water tank 5 to the iron separator 7. The ceramic pump 6 is made of ceramic material, which has good corrosion resistance and wear resistance, and can adapt to the sewage transport environment. Driven by the motor, the impeller of the ceramic pump 6 rotates at high speed, creating a negative pressure inside the pump, drawing the sewage from the second water tank 5 into the pump body, and then transporting it to the iron separator 7 through pipelines. Its stable transport capacity ensures that sewage can continuously and stably enter the iron separator 7 for treatment.

[0049] Specifically, the iron removal machine 7 is connected to the second water tank 5 via a ceramic pump 6, and is used to remove magnetic substances from the wastewater. The iron removal machine 7 typically employs electromagnetic iron removal. When wastewater passes through the iron removal machine 7, the electromagnets inside generate a strong magnetic field. Under the influence of this magnetic field, the magnetic substances in the wastewater are adsorbed onto the surface or internal magnetic components of the iron removal machine 7, thus separating the magnetic substances from the wastewater. After iron removal treatment, the content of magnetic substances in the wastewater is significantly reduced, preventing the magnetic substances from affecting subsequent equipment and product quality.

[0050] Specifically, the third water tank 8 is connected to the iron removal machine 7 via a pipeline and is used to store the wastewater treated by the iron removal machine 7. The wastewater treated by the iron removal machine 7 flows into the third water tank 8, which again serves as a storage and buffer. It provides a stable water source for the subsequent wastewater treatment by the bag filter 9, ensuring the continuity of the entire wastewater treatment process.

[0051] Specifically, the bag filter 9 is connected to the third water tank 8 via a second pneumatic diaphragm pump 3-2. The bag filter 9 is filled with activated carbon to adsorb organic matter in the wastewater. The second pneumatic diaphragm pump 3-2 transports wastewater from the third water tank 8 to the bag filter 9. The activated carbon inside the bag filter 9 has a rich pore structure and a large specific surface area, giving it a strong adsorption capacity for organic matter in the wastewater. When wastewater passes through the bag filter 9, organic matter is adsorbed onto the surface of the activated carbon, thereby removing organic matter from the wastewater and further improving the purification level.

[0052] Specifically, the tube screen filter assembly 10 is connected to the bag filter 9 via a pipeline for filtering wastewater. The tube screen filter assembly 10 includes at least one 0.1µm wound cotton core tube screen filter, at least one 0.05µm meltblown filter core tube screen filter, and at least one 0.01µm meltblown filter core tube screen filter. Wastewater passes through these filters of different precision sequentially. The 0.1µm wound cotton core tube screen filter first intercepts larger particulate impurities, the 0.05µm meltblown filter core tube screen filter further filters smaller particles, and the 0.01µm meltblown filter core tube screen filter performs fine filtration of the wastewater, removing tiny particles and some ions, thus greatly improving the purity of the wastewater.

[0053] Specifically, the workshop wastewater storage tank 11 is connected to the tube screen filter assembly 10 via a pipeline and is used to store the pre-purified wastewater after treatment by the tube screen filter assembly 10. The pre-purified wastewater after treatment by the tube screen filter assembly 10 flows into the workshop wastewater storage tank 11, which serves as a storage container to provide reserves for subsequent use. Simultaneously, the workshop wastewater storage tank 11 is equipped with a liquid level monitoring sensor, which is connected to the control system of the constant pressure pump 12, the first pneumatic diaphragm pump 3-1, and the second pneumatic diaphragm pump 3-2. When the liquid level is lower than the set lower limit, the liquid level monitoring sensor sends a signal to control the first pneumatic diaphragm pump 3-1 and the second pneumatic diaphragm pump 3-2 to start, replenishing the workshop wastewater storage tank 11 with treated wastewater; when the liquid level is higher than the set upper limit, the liquid level monitoring sensor controls the constant pressure pump 12 to stop working to prevent water overflow.

[0054] Specifically, the constant pressure pump 12 connects the workshop wastewater storage tank 11 to the production line slurry iron removal unit 1, and is used to transport water from the workshop wastewater storage tank 11 to the production line slurry iron removal unit 1, realizing the recycling of wastewater. The constant pressure pump 12 is driven by a motor and can maintain a stable pressure output during operation. When the water level in the workshop wastewater storage tank 11 reaches a certain condition, the constant pressure pump 12 starts and transports the purified water in the storage tank to the production line slurry iron removal unit 1 for equipment cleaning, thereby realizing the recycling of wastewater and reducing water consumption and wastewater treatment costs.

[0055] In this embodiment, the tube screen filter assembly 10 includes at least one 0.1µm wound cotton core tube screen filter, at least one 0.05µm meltblown filter core tube screen filter, and at least one 0.01µm meltblown filter core tube screen filter.

[0056] Specifically, the 0.1µm wound cotton core tube screen filter uses the gaps between the fibers of the wound cotton core to filter sewage, effectively intercepting larger particulate impurities such as rust and silt; the 0.05µm meltblown filter cartridge tube screen filter is manufactured using meltblown technology, and its filter cartridge structure is compact, which can further filter out smaller particles, including some fine metal particles and colloidal substances; the 0.01µm meltblown filter cartridge tube screen filter has even higher precision, and can remove tiny particles and some ions from sewage, ensuring that the sewage filtered by this component reaches a high level of purity.

[0057] In this embodiment, a secondary filtration device 13 is provided between the workshop water storage tank 11 and the production line slurry iron removal unit 1. The secondary filtration device 13 includes a 0.03µm meltblown filter element and a 0.01µm pleated filter element.

[0058] Specifically, before the purified water enters the slurry iron removal unit 1 of the production line, it is filtered again by the secondary filtration device 13. The 0.03µm melt-blown filter element can intercept some tiny particles remaining in the water flowing out of the water storage tank 11 in the workshop, further reducing the content of particulate impurities; the 0.01µm pleated filter element increases the filtration area through its pleated structure, improves the filtration accuracy, and can effectively remove finer impurities and some microorganisms, ensuring that the water finally entering the slurry iron removal unit 1 of the production line meets a high cleanliness standard, avoiding any impact on equipment and product quality.

[0059] In this embodiment, the water storage tank 11 in the workshop is equipped with a liquid level monitoring sensor, which is connected to the control system of the constant pressure pump 12, the first pneumatic diaphragm pump 3-1, and the second pneumatic diaphragm pump 3-2.

[0060] Specifically, the level monitoring sensor detects the water level in the workshop's water storage tank 11 and transmits the signal to the control system of the relevant pumps. When the water level is low, to ensure sufficient purified water for recycling, the level monitoring sensor controls the first pneumatic diaphragm pump 3-1 and the second pneumatic diaphragm pump 3-2 to start, allowing wastewater to enter the treatment process in a timely manner and replenish the workshop's water storage tank 11. When the water level is too high, to prevent water overflow, the level monitoring sensor controls the constant pressure pump 12 to stop working, ensuring the safety and stability of the system operation.

[0061] In one possible embodiment, both the tube screen filter assembly 10 and the secondary filtration device 13 are equipped with pressure monitoring sensors. The pressure monitoring sensors monitor pressure changes in real time during the filtration process. As the tube screen filter assembly 10 and the secondary filtration device 13 operate, impurities gradually accumulate on the surface of the filter element, leading to increased filtration resistance and pressure. When the pressure reaches a set threshold, the pressure monitoring sensor sends a signal to prompt the operator to replace the filter element to ensure filtration effectiveness and normal system operation, preventing filter clogging from affecting wastewater treatment efficiency and quality.

[0062] In one possible embodiment, the production line slurry iron removal unit 1 is equipped with a water replenishment port 1-1 and a water inlet 1-2. The water replenishment port 1-1 is used to replenish an appropriate amount of water to the system during system operation when the water storage tank 11 in the workshop is insufficient and the treated wastewater cannot be replenished in time, so as to maintain the normal operation of the production line slurry iron removal unit 1; the water inlet 1-2 is used to input fresh water source, providing an initial water source for the entire wastewater treatment cycle system when the system starts up or when a large amount of water needs to be replenished, ensuring that the system can operate smoothly.

[0063] In one possible embodiment, a pretreatment assembly consisting of several sequentially connected tube screen iron removal devices 14 and tube screen filtration devices 15 is further provided between the plate and frame bag filter 4 and the second water tank 5. This assembly is used to remove iron impurities from the wastewater and for filtration. The tube screen iron removal device 14 utilizes electromagnetic principles or mechanical filtration to further remove iron impurities from the wastewater, reducing the impact of iron impurities on subsequent treatment equipment. The tube screen filtration device 15 performs additional filtration on the wastewater, intercepting particulate impurities in the wastewater through screens or filter materials of different precision, improving the purity of the wastewater, reducing the burden on subsequent treatment processes, and ensuring the efficient operation of the entire wastewater treatment system.

[0064] The principle of this utility model is as follows:

[0065] In the battery material production process, the slurry iron removal unit 1 plays a crucial role, primarily responsible for removing iron from the slurry produced during battery material manufacturing. Due to factors such as the production environment, a large amount of wastewater awaiting treatment is generated during the iron removal process. The slurry iron removal unit 1 is equipped with a water replenishment inlet 1-1 and a water inlet 1-2. The water replenishment inlet 1-1 is used to replenish an appropriate amount of water to the system when the water level in the workshop water storage tank 11 is insufficient and the treated wastewater cannot be replenished in time, in order to maintain the normal operation of the slurry iron removal unit 1. The water inlet 1-2 is used to input fresh water, providing an initial water source for the entire wastewater treatment cycle system when the system starts up or when a large amount of water needs to be replenished, ensuring the smooth operation of the system.

[0066] Wastewater generated by the slurry iron removal unit 1 in the production line is first transported to the first water tank 2 via the first pneumatic diaphragm pump 3-1. Driven by compressed air, the first pneumatic diaphragm pump 3-1 stably draws wastewater from the slurry iron removal unit 1 and transports it to the first water tank 2. The first water tank 2 serves as a collection container for wastewater, temporarily storing it and providing a stable water supply for subsequent treatment, preventing the intermittent discharge of wastewater from affecting the subsequent treatment process. After flowing out of the first water tank 2, the wastewater enters the plate and frame bag filter 4. The plate and frame bag filter 4 utilizes the compression of the plates and frames and the filtration effect of the bags to perform preliminary filtration of the wastewater. During this process, large particulate impurities in the wastewater, such as solid particles and fibers, are intercepted on the plates and frames and bags, thereby removing large particulate impurities and greatly reducing the burden on subsequent treatment equipment.

[0067] After initial filtration, the wastewater flows into the second tank 5 for storage. The second tank 5 serves as a buffer and regulates the water flow, ensuring the continuous and stable operation of subsequent treatment equipment, unaffected by fluctuations in wastewater flow. Subsequently, the ceramic pump 6 transports the wastewater from the second tank 5 to the iron removal machine 7. The ceramic pump 6 is made of ceramic material, possessing excellent corrosion resistance and wear resistance, and can adapt to the wastewater transport environment. Driven by a motor, the impeller of the ceramic pump 6 rotates at high speed, creating negative pressure inside the pump, drawing in the wastewater and transporting it to the iron removal machine 7.

[0068] The iron removal machine 7 utilizes electromagnetic principles. When wastewater passes through, the magnetic field generated inside attracts magnetic substances in the wastewater, separating them from the wastewater. This effectively removes magnetic substances from the wastewater, preventing them from adversely affecting subsequent equipment and product quality. The wastewater after iron removal enters the third water tank 8 for storage. The third water tank 8 also serves as a buffer and regulates the water volume, ensuring the stable operation of subsequent treatment processes.

[0069] Next, the second pneumatic diaphragm pump 3-2 transports the wastewater from the third water tank 8 to the bag filter 9. The bag filter 9 is filled with activated carbon, which has a rich pore structure and a large specific surface area, giving it a strong adsorption capacity for organic matter in the wastewater. When the wastewater passes through the bag filter 9, the organic matter is adsorbed by the activated carbon, thus removing the organic matter from the wastewater and further purifying it. The wastewater exiting the bag filter 9 enters the tube screen filter assembly 10. The tube screen filter assembly 10 includes at least one 0.1µm wound cotton core tube screen filter, at least one 0.05µm meltblown filter tube screen filter, and at least one 0.01µm meltblown filter tube screen filter. The wastewater passes through these filters of different precision in sequence. The 0.1µm wound cotton core tube screen filter first intercepts larger particulate impurities, the 0.05µm meltblown filter tube screen filter further filters smaller particles, and the 0.01µm meltblown filter tube screen filter performs fine filtration, removing tiny particles and some ions, significantly improving the purity of the wastewater.

[0070] The pre-purified wastewater, after being treated by the tube screen filter assembly 10, flows into the workshop wastewater storage tank 11. The workshop wastewater storage tank 11 is equipped with a level monitoring sensor, which is connected to the control system of the constant pressure pump 12, the first pneumatic diaphragm pump 3-1, and the second pneumatic diaphragm pump 3-2. When the liquid level is below the set lower limit, the level monitoring sensor controls the first and second pneumatic diaphragm pumps 3-1 and 3-2 to start, ensuring that wastewater promptly enters the treatment process and replenishes the workshop wastewater storage tank 11. When the liquid level is above the set upper limit, the level monitoring sensor controls the constant pressure pump 12 to stop working, preventing water overflow and ensuring the safety and stability of the system operation.

[0071] A secondary filtration device 13 is installed between the water storage tank 11 and the slurry iron removal unit 1 in the workshop. The secondary filtration device 13 includes a 0.03µm melt-blown filter element and a 0.01µm pleated filter element. Before the purified water enters the slurry iron removal unit 1, the 0.03µm melt-blown filter element intercepts residual tiny particles in the water, further reducing the content of particulate impurities; the 0.01µm pleated filter element increases the filtration area through its pleated structure, improving filtration accuracy and effectively removing even finer impurities and some microorganisms, ensuring that the water entering the slurry iron removal unit 1 meets a high cleanliness standard.

[0072] Both the tubular screen filter assembly 10 and the secondary filter device 13 are equipped with pressure monitoring sensors. During the filtration process, as impurities accumulate on the surface of the filter element, the filtration resistance increases, and the pressure gradually rises. When the pressure reaches a set threshold, the pressure monitoring sensor sends a signal, prompting the operator to replace the filter element to ensure the filtration effect and the normal operation of the system. Furthermore, between the plate and frame bag filter 4 and the second water tank 5, a pretreatment assembly consisting of several sequentially connected tubular screen iron removal devices 14 and tubular screen filters 15 is provided. The tubular screen iron removal device 14 further removes iron impurities from the wastewater, reducing the impact of iron impurities on subsequent treatment equipment; the tubular screen filter 15 intercepts particulate impurities in the wastewater through screens or filter materials of different precision, improving the purity of the wastewater and reducing the burden on subsequent treatment processes. Finally, the purified water, after a series of treatments, is pumped by the constant pressure pump 12 to the production line slurry iron removal unit 1 for equipment cleaning, realizing the recycling of wastewater. The constant pressure pump 12 can maintain a stable pressure output, ensuring that the purified water can be smoothly delivered to the slurry iron removal unit 1 in the production line, completing the closed loop of the entire wastewater recycling.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A system for recycling and reusing wastewater from battery material production, characterized in that, include: The production line slurry iron removal unit (1) is used for the iron removal process of slurry in the battery material production process, generating wastewater to be treated; The first water tank (2) is connected to the production line slurry iron removal unit (1) via the first pneumatic diaphragm pump (3-1) and is used to collect the wastewater generated by the production line slurry iron removal unit (1). The plate and frame bag filter (4) is connected to the first water tank (2) by a pipeline and is used to perform preliminary filtration of the sewage in the first water tank (2) to remove large particulate impurities; The second water tank (5) is connected to the plate and frame bag filter (4) by a pipeline and is used to store the wastewater filtered by the plate and frame bag filter (4); A ceramic pump (6) is connected to the second water tank (5) and the iron remover (7) to transport the sewage in the second water tank (5) to the iron remover (7); The iron removal machine (7) is connected to the second water tank (5) via a ceramic pump (6) and is used to remove magnetic substances from the sewage. The third water tank (8) is connected to the pipe of the iron removal machine (7) and is used to store the sewage treated by the iron removal machine (7); The bag filter (9) is connected to the third water tank (8) via the second pneumatic diaphragm pump (3-2). The bag filter (9) is filled with activated carbon to adsorb organic matter in the sewage. The tube screen filter assembly (10) is connected to the bag filter (9) via a pipe and is used to filter sewage; The workshop water storage tank (11) is connected to the pipe screen filter assembly (10) and is used to store the pre-purified wastewater after being treated by the pipe screen filter assembly (10); A constant pressure pump (12) is connected to the workshop water storage tank (11) and the production line slurry iron removal unit (1). It is used to transport water from the workshop water storage tank (11) to the production line slurry iron removal unit (1) to realize the recycling of wastewater.

2. The wastewater recycling system for battery material production according to claim 1, characterized in that, The tube screen filter assembly (10) includes at least one 0.1µm wire-wound cotton core tube screen filter, at least one 0.05µm meltblown filter core tube screen filter and at least one 0.01µm meltblown filter core tube screen filter.

3. The wastewater recycling system for battery material production according to claim 1, characterized in that, A secondary filtration device (13) is provided between the water storage tank (11) in the workshop and the slurry iron removal unit (1) in the production line. The secondary filtration device (13) includes a 0.03um meltblown filter element and a 0.01um pleated filter element.

4. The wastewater recycling system for battery material production according to claim 1, characterized in that, The water storage tank (11) in the workshop is equipped with a liquid level monitoring sensor, which is connected to the control system of the constant pressure pump (12), the first pneumatic diaphragm pump (3-1), and the second pneumatic diaphragm pump (3-2).

5. The wastewater recycling system for battery material production according to claim 1, characterized in that, Both the tube screen filter assembly (10) and the secondary filter device (13) are equipped with pressure monitoring sensors.

6. The wastewater recycling system for battery material production according to claim 1, characterized in that, The production line slurry iron removal unit (1) is equipped with a water inlet (1-1) and a water outlet (1-2).

7. The wastewater recycling system for battery material production according to claim 1, characterized in that, Between the plate and frame bag filter (4) and the second water tank (5), there is also a pretreatment component consisting of several tube screen iron removal devices (14) and tube screen filtration devices (15) connected in sequence, used to remove iron impurities from sewage and filter it.

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