A kind of chemical polishing waste liquid filtration and aluminum removal concentration system

Abstract

The utility model discloses a kind of chemical polishing waste liquid filtration aluminium removal concentration systems, including chemical polishing waste liquid collection tank, chemical polishing waste liquid primary filtration system, initial purification collection tank, chemical polishing waste liquid fine filtration system, fine filtration chemical polishing waste liquid collection tank, chemical polishing waste liquid aluminium removal system, high concentration chemical polishing liquid collection tank, low concentration chemical polishing liquid collection tank, acid circulating evaporation system and chemical polishing liquid finished product storage tank;The chemical polishing waste liquid filtration aluminium removal concentration system of the utility model contains rough filtration, fine filtration, aluminium removal and acid concentration and the like process, can remove and filter impurity, particulate matter, aluminium ion etc. in chemical polishing waste liquid. Water in the purified chemical polishing liquid is separated using the mode of circulating concentration, so that chemical polishing liquid is concentrated to the use requirement of production workshop. The utility model can effectively reduce the phosphorus content in effluent.

Description

Technical Field

[0001] This utility model relates to the field of chemical polishing waste liquid treatment, and in particular to a chemical polishing waste liquid filtration, aluminum removal, and concentration system. Background Technology

[0002] Inorganic acids such as sulfuric acid, hydrochloric acid, nitric acid, and phosphoric acid are widely used in the production of aluminum electrolytic capacitors, including in corrosion, formation, and working electrolytes. However, these processes generate large amounts of acidic waste liquid. Direct discharge of this waste acid not only causes serious pollution to the surrounding environment but also results in a significant waste of resources, especially phosphorus, which is becoming increasingly scarce. Therefore, it is essential to protect and recycle these resources as much as possible.

[0003] Currently, the waste acid liquid generated after the above-mentioned production is usually treated by lime neutralization. On the one hand, the neutralization process requires a large amount of alkali, which wastes resources and generates a large amount of wastewater and waste residue, causing secondary pollution. This seriously hinders the sustainable development of related industries and poses a serious threat to the human living environment. On the other hand, the large processing volume results in poor phosphorus recovery from the waste acid liquid, making it difficult to recycle and waste resources. Furthermore, the recovered waste liquid is difficult to meet emission standards.

[0004] In the front-end process of waste acid treatment, aluminum needs to be removed from the waste acid, and the waste acid after aluminum removal is then concentrated and recycled. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a chemical polishing waste liquid filtration and aluminum removal concentration system.

[0006] The purpose of this utility model is achieved through the following technical solution: a chemical polishing waste liquid filtration and aluminum removal concentration system, including a chemical polishing waste liquid collection tank, a chemical polishing waste liquid primary filtration system, a primary purification collection tank, a chemical polishing waste liquid fine filtration system, a fine filtration chemical polishing waste liquid collection tank, a chemical polishing waste liquid aluminum removal system, a high-concentration chemical polishing liquid collection tank, a low-concentration chemical polishing liquid collection tank, an acid circulation evaporation system, and a chemical polishing liquid finished product storage tank. The chemical polishing wastewater primary filtration system includes a primary filter cartridge. The chemical polishing wastewater from the collection tank is fed to the primary filter cartridge for primary filtration. The pre-purified chemical polishing wastewater after filtration by the primary filter cartridge is then stored in the primary purification collection tank. The chemical polishing wastewater from the primary purification collection tank is then fed to a chemical polishing wastewater fine filtration system for fine filtration. The chemical polishing wastewater from the fine filtration system is then stored in the fine filtration chemical polishing wastewater collection tank. Unfiltered chemical polishing wastewater is returned to the primary purification collection tank. The chemical polishing wastewater from the fine filtration chemical polishing wastewater collection tank is then fed to the chemical polishing... The waste liquid aluminum removal system separates the finely filtered chemical polishing waste liquid into high-concentration and low-concentration chemical polishing solutions. The high-concentration chemical polishing solution is sent to the high-concentration chemical polishing solution collection tank, and the low-concentration chemical polishing solution is sent to the low-concentration chemical polishing solution collection tank. The chemical polishing solution in the low-concentration chemical polishing solution collection tank is sent to the acid circulation evaporation system. The acid circulation evaporation system separates the water and chemical polishing solution through circulation evaporation. After multiple circulation evaporation and concentration, the finished chemical polishing solution is sent to the finished chemical polishing solution storage tank for storage.

[0007] As an improvement of the chemical polishing waste liquid filtration and aluminum removal concentration system of this utility model, the chemical polishing waste liquid fine filtration system includes a first ceramic filter element module, a second ceramic filter element module and a fine filtration raw water pump. The fine filtration raw water pump transports the liquid from the primary purification collection tank to the first ceramic filter element module for filtration, and the filtered liquid is transported to the fine filtration chemical polishing waste liquid collection tank for collection. The first ceramic filter module is connected to the second ceramic filter module. The unfiltered liquid from the first ceramic filter module flows into the second ceramic filter module for filtration. The liquid filtered by the second ceramic filter module is transported to the fine filtration waste liquid collection tank for collection. The unfiltered liquid from the second ceramic filter module flows into the primary purification collection tank for secondary filtration.

[0008] As an improvement to the aluminum removal and concentration system for chemical polishing waste liquid filtration of this utility model, each of the primary purification collection tank, the fine filtration chemical polishing waste liquid collection tank, the high-concentration chemical polishing liquid collection tank, and the low-concentration chemical polishing liquid collection tank is equipped with a high-level liquid level sensor, a medium-level liquid level sensor, and a low-level liquid level sensor. On the outer side of the primary purification collection tank, the fine filtration chemical polishing waste liquid collection tank, and the high-concentration chemical polishing liquid collection tank, corresponding to the positions of the high-level liquid level sensor, the medium-level liquid level sensor, and the low-level liquid level sensor, high-level liquid level indicator lights are provided. When the high-level liquid level indicator light is red, it indicates a full liquid level. When the high-level liquid level sensor detects liquid, the high-level liquid level indicator light is red. When the mid-level liquid level sensor and the low-level liquid level sensor do not detect liquid, the mid-level liquid level indicator and the low-level liquid level indicator will turn red. When the mid-level liquid level indicator and the low-level liquid level indicator turn red, it indicates that there is a shortage of water in the mid- and low-level liquid levels.

[0009] As an improvement of the chemical waste liquid filtration and aluminum removal concentration system of this utility model, the inlet of the fine filtration raw water pump is connected to the outlet of the primary purification collection tank through a first pipe, and the outlet of the fine filtration raw water pump is connected to the inlet of the first ceramic filter module through a second pipe. The second pipe is equipped with a raw water pressure relief valve. The inlet of the fine filtration waste liquid collection tank is provided with a third pipe, and the third pipe is provided with a first backflushing fresh water valve, a second backflushing fresh water valve and a fresh water flow meter. The outlet of the first ceramic filter module and the second ceramic filter module after filtration is provided with a fourth pipe, and the outlet of the fourth pipe is connected to the pipe between the first backflushing fresh water valve and the second backflushing fresh water valve. The unfiltered outlet of the first ceramic filter module is connected to the inlet of the second ceramic filter module through a fifth pipe, and the unfiltered outlet of the second ceramic filter module is connected to the primary purification collection tank through a sixth pipe. The sixth pipe is equipped with a backflushing concentrate valve, a concentrate flow meter, and a concentrate pressure relief valve.

[0010] As an improvement of the chemical polishing waste liquid filtration and aluminum removal concentration system of this utility model, the chemical polishing waste liquid aluminum removal system includes a plunger pump, a nanofiltration membrane, a filter, and a booster pump. The booster pump transports the chemical polishing waste liquid from the fine filtration chemical polishing waste liquid collection tank to the filter. The plunger pump transports the chemical polishing liquid filtered by the filter to the nanofiltration membrane. The chemical polishing liquid undergoes liquid-liquid separation through the nanofiltration membrane. The high-concentration chemical polishing liquid is transported to the high-concentration chemical polishing liquid collection tank or the fine filtration chemical polishing waste liquid collection tank for collection, and the low-concentration chemical polishing liquid is transported to the low-concentration chemical polishing liquid collection tank for storage.

[0011] As an improvement of the chemical waste liquid filtration and aluminum removal concentration system of this utility model, the outlet of the filter is connected to the inlet of the plunger pump through a seventh pipe, and a low-pressure protection switch is provided on the seventh pipe. The outlet of the plunger pump is connected to the inlet of the nanofiltration membrane through an eighth pipe, and a raw water pressure relief valve is provided on the eighth pipe. The low-concentration outlet of the nanofiltration membrane is connected to the low-concentration chemical discharge collection tank through a ninth pipe, and a freshwater flow meter is installed on the ninth pipe.

[0012] As an improvement to the aluminum removal and concentration system for chemical waste liquid filtration of this utility model, the high-concentration outlet of the nanofiltration membrane is connected to the tenth pipe. The outlet end of the tenth pipe is provided with a first branch pipe and a second branch pipe. The outlet ends of the first branch pipe and the second branch pipe are connected to the eleventh pipe. The outlet end of the eleventh pipe is connected to the inlet of the T-shaped water regulating valve. One outlet of the T-shaped water regulating valve is connected to the inlet of the high-concentration chemical waste liquid collection tank through the twelfth pipe, and the other outlet is connected to the inlet of the fine chemical waste liquid collection tank through the thirteenth pipe. The first branch pipe is provided with a second concentrated water pressure relief valve and a pressure-holding valve. The second branch pipe is provided with a quick-flush valve. The eleventh pipe is provided with a second concentrated water flow meter.

[0013] As an improvement to the aluminum removal and concentration system for chemical polishing waste liquid filtration of this utility model, the acid circulation evaporation system includes a concentrated acid collection tank, a concentrated acid guide tank pump, a silicon carbide heat exchanger, a separation box, an acid circulation vertical pump, and a ventilation box. The concentrated acid guide tank pump delivers the chemical polishing liquid after aluminum ion removal to the concentrated acid collection tank for collection. The acid circulation vertical pump delivers the concentrated acid liquid from the concentrated acid collection tank to the silicon carbide heat exchanger for heating. The concentrated acid liquid heated by the silicon carbide heat exchanger is delivered to the separation box for separation of water and chemical polishing liquid. The ventilation box blows the separated water vapor out of the box.

[0014] As an improvement of the chemical waste liquid filtration and aluminum removal concentration system of this utility model, multiple diversion pipes are arranged at intervals on the inner side wall of the separation box. The outlet of each diversion pipe is connected to multiple atomizing branch pipes. Multiple atomizing nozzles are arranged at intervals on each atomizing branch pipe. The atomizing nozzles are arranged vertically downwards. The outlet of the silicon carbide heat exchanger is connected to each of the branch pipes through the fourteenth pipe. The acid circulation vertical pump is installed at the top of the concentrated acid collection tank. The inlet of the acid circulation vertical pump extends into the bottom of the concentrated acid collection tank. The outlet of the acid circulation vertical pump is connected to the inlet of the silicon carbide heat exchanger through the fifteenth pipe.

[0015] As an improvement of the chemical waste liquid filtration and aluminum removal concentration system of this utility model, the ventilation box is divided by a middle partition to form an air inlet cavity and an air outlet cavity. An exhaust fan is provided in the air outlet cavity. An air inlet is provided on one side of the ventilation box corresponding to the air inlet cavity. An air filter mounting slot and a wind heater are provided at the air inlet. An air filter is provided in the air filter mounting slot. The air inlet is connected to the air inlet cavity. Both the air inlet cavity and the air outlet cavity are connected to the upper end of the separation box. The lower end of the separation box is connected to the concentrated acid collection tank. A first silicone plate is placed between the upper edge of the concentrated acid collection tank and the lower edge of the separation box. The upper edge of the concentrated acid collection tank and the lower edge of the separation box are fixed by screws and sealed with acidic glass glue. A second silicone plate is provided between the upper edge of the separation box and the lower edge of the ventilation box. The upper edge of the separation box and the lower edge of the ventilation box are fixed by screws and sealed with acidic glass glue. It also includes a bottom support, on which the concentrated acid collection tank, silicon carbide heat exchanger and concentrated acid guide tank pump are all mounted; the bottom of the bottom support is provided with multiple support feet spaced apart, each support foot including an adjusting screw and a screw, the screw being screwed to the adjusting screw, and rotating the adjusting screw can adjust the level of the bottom support.

[0016] The beneficial effects of this invention are as follows: The chemical polishing wastewater filtration and aluminum removal concentration system of this invention includes processes such as coarse filtration, fine filtration, aluminum removal, and acid concentration, which can remove impurities, particulate matter, aluminum ions, etc. from the chemical polishing wastewater. It employs a circulating concentration method to separate the water in the purified chemical polishing solution, concentrating it to the requirements of the production workshop. This invention can effectively reduce the phosphorus content in the discharged wastewater. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the system structure of this utility model; Figure 2 This is a schematic diagram of the chemical waste liquid fine filtration system of this utility model; Figure 3 This is a schematic diagram of the aluminum removal system for chemical polishing waste liquid of this utility model; Figure 4 This is a side view of the acid circulation evaporation system of this utility model; Figure 5 This is a schematic diagram of the first internal structure of the acid circulation evaporation system of this utility model; Figure 6 This is a schematic diagram of the second internal structure of the acid circulation evaporation system of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0021] like Figures 1-6 As shown, a chemical polishing waste liquid filtration and aluminum removal concentration system includes a chemical polishing waste liquid collection tank 1, a chemical polishing waste liquid primary filtration system 2, a primary purification collection tank 3, a chemical polishing waste liquid fine filtration system 4, a fine filtration chemical polishing waste liquid collection tank 5, a chemical polishing waste liquid aluminum removal system 6, a high-concentration chemical polishing liquid collection tank 7, a low-concentration chemical polishing liquid collection tank 8, an acid circulation evaporation system 9, and a chemical polishing liquid finished product storage tank 10. The primary filtration system 2 for chemical polishing waste liquid includes a primary filter cartridge (not shown in the figure). The primary filter cartridge uses a composite membrane filter. The chemical polishing waste liquid from the chemical polishing waste liquid collection tank 1 is transported to the primary filter cartridge for primary filtration. The pre-purified chemical polishing waste liquid after filtration by the primary filter cartridge is transported to the primary purification collection tank 3 for storage. The chemical polishing waste liquid from the primary purification collection tank 3 is transported to the chemical polishing waste liquid fine filtration system 4 for fine filtration. The chemical polishing waste liquid after filtration by the chemical polishing waste liquid fine filtration system 4 is transported to the fine filtration chemical polishing waste liquid collection tank 5 for storage. The unfiltered chemical polishing waste liquid is transported back to the primary purification collection tank 3. The chemical polishing waste liquid from the fine filtration chemical polishing waste liquid collection tank 5 is transported back to the primary purification collection tank 3. The waste liquid is sent to the aluminum removal system 6 for chemical polishing. The chemical polishing waste liquid aluminum removal system 6 separates the finely filtered chemical polishing waste liquid into high-concentration chemical polishing liquid and low-concentration chemical polishing liquid. The high-concentration chemical polishing liquid is sent to the high-concentration chemical polishing liquid collection tank 7, and the low-concentration chemical polishing liquid is sent to the low-concentration chemical polishing liquid collection tank 8. The chemical polishing liquid in the low-concentration chemical polishing liquid collection tank 8 is sent to the acid circulation evaporation system 9. The acid circulation evaporation system 9 separates the water and chemical polishing liquid through circulation evaporation. After multiple circulation evaporation and concentration, the finished chemical polishing liquid is sent to the finished chemical polishing liquid storage tank 10 for storage.

[0022] Preferably, the chemical waste liquid fine filtration system 4 includes a first ceramic filter module 41, a second ceramic filter module 42, and a fine filtration raw water pump 43. The fine filtration raw water pump 43 transports the liquid from the primary purification collection tank 3 to the first ceramic filter module 41 for filtration, and the filtered liquid is transported to the fine filtration chemical waste liquid collection tank 5 for collection. The first ceramic filter module 41 is connected to the second ceramic filter module 42. The unfiltered liquid from the first ceramic filter module 41 flows into the second ceramic filter module 42 for filtration. The liquid filtered by the second ceramic filter module 42 is transported to the fine filtration waste liquid collection tank 5 for collection. The unfiltered liquid from the second ceramic filter module 42 flows into the primary purification collection tank 3 for secondary filtration.

[0023] Preferably, the primary purification collection tank 3, the fine filtration waste liquid collection tank 5, the high-concentration waste liquid collection tank 7, and the low-concentration waste liquid collection tank 8 are all equipped with high-level liquid level sensors, medium-level liquid level sensors, and low-level liquid level sensors. The outer sides of the primary purification collection tank, the fine filtration waste liquid collection tank, and the high-concentration waste liquid collection tank are equipped with high-level liquid level indicator lights 11, medium-level liquid level indicator lights 12, and low-level liquid level indicator lights 13, respectively, corresponding to the positions of the high-level liquid level sensors and the medium-level liquid level sensors. When the high-level liquid level indicator light 11 shows a red light, it indicates that the liquid level is full. When the high-level liquid level sensor detects liquid, the high-level liquid level indicator light 11 shows a red light. When the middle level sensor and the low level sensor do not detect liquid, the middle level indicator 12 and the low level indicator 13 will turn red. When the middle level indicator 12 and the low level indicator 13 turn red, it indicates that the middle and low levels are short of water.

[0024] Preferably, the inlet of the fine filtration raw water pump 43 is connected to the outlet of the primary purification collection tank 3 through a pipe via a first pipe 44, and the outlet of the fine filtration raw water pump 43 is connected to the inlet of the first ceramic filter module 41 through a second pipe 45. A raw water pressure relief valve 46 is provided on the second pipe 45. The inlet of the fine filtration waste liquid collection tank 5 is provided with a third pipe 47, and the third pipe 47 is provided with a first backflushing fresh water valve 48, a second backflushing fresh water valve 49 and a fresh water flow meter 40. The outlet of the first ceramic filter module 41 and the second ceramic filter module 42 is provided with a fourth pipe 401, and the outlet of the fourth pipe 401 is connected to the pipe between the first backflushing fresh water valve 48 and the second backflushing fresh water valve 49. The unfiltered outlet of the first ceramic filter module 41 is connected to the inlet of the second ceramic filter module 42 through the fifth pipe 402. The unfiltered outlet of the second ceramic filter module 42 is connected to the primary purification collection tank 3 through the sixth pipe 403. The sixth pipe 403 is equipped with a backflushing concentrate valve 404, a concentrate flow meter 405, and a concentrate pressure relief valve 406.

[0025] Preferably, the aluminum removal system 6 for chemical polishing waste liquid includes a plunger pump 61, a nanofiltration membrane 62, a filter 63, and a booster pump 64. The booster pump 64 transports the chemical polishing waste liquid from the fine filtration chemical polishing waste liquid collection tank 5 to the filter 63. The plunger pump 61 transports the chemical polishing liquid filtered by the filter to the nanofiltration membrane 62. The chemical polishing liquid undergoes liquid-liquid separation through the nanofiltration membrane 62. The high-concentration chemical polishing liquid is transported to the high-concentration chemical polishing liquid collection tank 7 or the fine filtration chemical polishing waste liquid collection tank 5 for collection, while the low-concentration chemical polishing liquid is transported to the low-concentration chemical polishing liquid collection tank 8 for storage.

[0026] Preferably, the outlet of filter 63 is connected to the inlet of plunger pump 61 through a seventh pipe 65, and a low-pressure protection switch 66 is provided on the seventh pipe 65. The outlet of plunger pump 61 is connected to the inlet of nanofiltration membrane 62 through an eighth pipe 67, and a second raw water pressure relief valve 68 is provided on the eighth pipe 67. The low-concentration outlet of the nanofiltration membrane 62 is connected to the low-concentration chemical discharge collection tank 8 through the ninth pipe 69, and the ninth pipe 69 is equipped with a second freshwater flow meter 60.

[0027] Preferably, the high-concentration outlet of the nanofiltration membrane 62 is connected to the tenth pipe 601. The outlet end of the tenth pipe 601 is provided with a first branch pipe 602 and a second branch pipe 603. The outlet ends of the first branch pipe 602 and the second branch pipe 603 are connected to the eleventh pipe 604. The outlet end of the eleventh pipe 604 is connected to the inlet of the T-shaped water regulating valve 605. One outlet of the T-shaped water regulating valve 605 is connected to the inlet of the high-concentration chemical waste collection tank 7 through the twelfth pipe 606, and the other outlet is connected to the inlet of the fine filtration chemical waste collection tank 5 through the thirteenth pipe 607. The first branch pipe 602 is provided with a second concentrate pressure relief valve 608 and a pressure-holding valve 609. The second branch pipe 603 is provided with a quick-flush valve 610. The eleventh pipe 604 is provided with a second concentrate flow meter 611.

[0028] When the quick-flush valve 610 is closed, the flow direction of the concentrate is as follows: from the tenth pipe 601 to the first branch pipe 602, from the first branch pipe 602 to the eleventh pipe 604, from the eleventh pipe 604 to the T-shaped water regulating valve 605, from the T-shaped water regulating valve 605 to the thirteenth pipe 607, and from the thirteenth pipe 607 to the fine filtration waste liquid collection tank 5. When the pressure relief valve 609 is closed, the flow direction of the concentrate is as follows: from the tenth pipe 601 to the second branch pipe 603, from the second branch pipe 603 to the eleventh pipe 604, from the eleventh pipe 604 to the T-shaped water regulating valve 605, from the T-shaped water regulating valve 605 to the twelfth pipe 606, and from the twelfth pipe 606 to the high-concentration liquid collection tank 7.

[0029] Preferably, the acid circulation evaporation system 9 includes a concentrated acid collection tank 91, a concentrated acid guide tank pump 92, a silicon carbide heat exchanger 93, a separation box 94, an acid circulation vertical pump 95, and a ventilation box 96. The concentrated acid guide tank pump 92 transports the chemical polishing liquid after aluminum ion removal to the concentrated acid collection tank 91 for collection. The acid circulation vertical pump 95 transports the concentrated acid liquid from the concentrated acid collection tank 91 to the silicon carbide heat exchanger 93 for heating. The silicon carbide heat exchanger 93 transports the heated concentrated acid liquid to the separation box 94 for separation of water and chemical polishing liquid. The ventilation box 96 blows the separated water vapor out of the box.

[0030] Preferably, a plurality of diversion pipes 941 are arranged at intervals on the inner side wall of the separation box 94, and the outlet of each diversion pipe 941 is connected to a plurality of atomizing branch pipes 942. A plurality of atomizing nozzles are arranged at intervals on each atomizing branch pipe 942, and the atomizing nozzles are arranged vertically downward. The outlet of the silicon carbide heat exchanger 96 is connected to each branch pipe 941 through the fourteenth pipe 97. The acid circulation vertical pump 95 is located at the top of the concentrated acid collection tank 91. The inlet of the acid circulation vertical pump 95 extends into the bottom of the concentrated acid collection tank 91. The outlet of the acid circulation vertical pump 95 is connected to the inlet of the silicon carbide heat exchanger 93 through the fifteenth pipe 98.

[0031] Preferably, the ventilation box 96 is divided by a middle partition 961 to form an air inlet cavity 962 and an air outlet cavity 963. An exhaust fan is provided in the air outlet cavity 963. An air inlet 964 is provided on one side of the ventilation box 96 corresponding to the air inlet cavity 962. An air filter mounting slot 965 and a wind heater 966 are provided at the air inlet 964. An air filter is provided in the air filter mounting slot 965. The air inlet 964 is connected to the air inlet cavity 962. Both the air inlet cavity 962 and the air outlet cavity 963 are connected to the upper end of the separation box 94. The lower end of the separation box 94 is connected to the concentrated acid collection tank 91. A first silicone plate is placed between the upper edge of the concentrated acid collection tank 91 and the lower edge of the separation box 94. The upper edge of the concentrated acid collection tank 91 and the lower edge of the separation box 94 are fixed by screws and sealed with acidic glass glue. A second silicone plate is provided between the upper edge of the separation box 94 and the lower edge of the ventilation box 96. The upper edge of the separation box 94 and the lower edge of the ventilation box 96 are fixed by screws and sealed with acidic glass glue. It also includes a bottom support 98, a concentrated acid collection tank 91, a silicon carbide heat exchanger 93, and a concentrated acid guide tank pump 92, all of which are mounted on the bottom support 98; the bottom of the bottom support 98 is provided with multiple support feet 99 spaced apart, each support foot 99 including an adjusting screw and a screw, the screw being screwed to the adjusting screw, and rotating the adjusting screw can adjust the level of the bottom support 98.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and structure of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A system for filtering and concentrating aluminum from chemical polishing wastewater, characterized in that, It includes a chemical polishing waste liquid collection tank, a chemical polishing waste liquid primary filtration system, a primary purification collection tank, a chemical polishing waste liquid fine filtration system, a fine filtration chemical polishing waste liquid collection tank, a chemical polishing waste liquid aluminum removal system, a high-concentration chemical polishing liquid collection tank, a low-concentration chemical polishing liquid collection tank, an acid circulation evaporation system, and a chemical polishing liquid finished product storage tank. The chemical polishing wastewater primary filtration system includes a primary filter cartridge. The chemical polishing wastewater from the collection tank is fed to the primary filter cartridge for primary filtration. The pre-purified chemical polishing wastewater after filtration by the primary filter cartridge is then stored in the primary purification collection tank. The chemical polishing wastewater from the primary purification collection tank is then fed to a chemical polishing wastewater fine filtration system for fine filtration. The chemical polishing wastewater from the fine filtration system is then stored in the fine filtration chemical polishing wastewater collection tank. Unfiltered chemical polishing wastewater is returned to the primary purification collection tank. The chemical polishing wastewater from the fine filtration chemical polishing wastewater collection tank is then fed to the chemical polishing... The waste liquid aluminum removal system separates the finely filtered chemical polishing waste liquid into high-concentration and low-concentration chemical polishing solutions. The high-concentration chemical polishing solution is sent to the high-concentration chemical polishing solution collection tank, and the low-concentration chemical polishing solution is sent to the low-concentration chemical polishing solution collection tank. The chemical polishing solution in the low-concentration chemical polishing solution collection tank is sent to the acid circulation evaporation system. The acid circulation evaporation system separates the water and chemical polishing solution through circulation evaporation. After multiple circulation evaporation and concentration, the finished chemical polishing solution is sent to the finished chemical polishing solution storage tank for storage.

2. The aluminum removal and concentration system for chemical polishing waste liquid filtration according to claim 1, characterized in that, The chemical waste liquid fine filtration system includes a first ceramic filter module, a second ceramic filter module, and a fine filtration raw water pump. The fine filtration raw water pump transports the liquid from the primary purification collection tank to the first ceramic filter module for filtration, and the filtered liquid is transported to the fine filtration chemical waste liquid collection tank for collection. The first ceramic filter module is connected to the second ceramic filter module. The unfiltered liquid from the first ceramic filter module flows into the second ceramic filter module for filtration. The liquid filtered by the second ceramic filter module is transported to the fine filtration waste liquid collection tank for collection. The unfiltered liquid from the second ceramic filter module flows into the primary purification collection tank for secondary filtration.

3. The aluminum removal and concentration system for chemical polishing waste liquid filtration according to claim 2, characterized in that, Each of the primary purification collection tank, the fine filtration waste liquid collection tank, the high-concentration waste liquid collection tank, and the low-concentration waste liquid collection tank is equipped with a high-level liquid level sensor, a medium-level liquid level sensor, and a low-level liquid level sensor. On the outer side of each of the primary purification collection tank, the fine filtration waste liquid collection tank, and the high-concentration waste liquid collection tank, corresponding to the positions of the high-level liquid level sensor, the medium-level liquid level sensor, and the low-level liquid level sensor, there are high-level liquid level indicator lights, medium-level liquid level indicator lights, and low-level liquid level indicator lights. When the high-level liquid level indicator light is red, it indicates a full liquid level. When the high-level liquid level sensor detects liquid, the high-level liquid level indicator light is red. When the mid-level liquid level sensor and the low-level liquid level sensor do not detect liquid, the mid-level liquid level indicator and the low-level liquid level indicator will turn red. When the mid-level liquid level indicator and the low-level liquid level indicator turn red, it indicates that there is a shortage of water in the mid- and low-level liquid levels.

4. The aluminum removal and concentration system for chemical polishing waste liquid filtration according to claim 2, characterized in that, The inlet of the fine filtration raw water pump is connected to the outlet of the primary purification collection tank through a first pipe, and the outlet of the fine filtration raw water pump is connected to the inlet of the first ceramic filter module through a second pipe. A raw water pressure relief valve is provided on the second pipe. The inlet of the fine filtration waste liquid collection tank is provided with a third pipe, and the third pipe is provided with a first backflushing fresh water valve, a second backflushing fresh water valve and a fresh water flow meter. The outlet of the first ceramic filter module and the second ceramic filter module after filtration is provided with a fourth pipe, and the outlet of the fourth pipe is connected to the pipe between the first backflushing fresh water valve and the second backflushing fresh water valve. The unfiltered outlet of the first ceramic filter module is connected to the inlet of the second ceramic filter module through a fifth pipe, and the unfiltered outlet of the second ceramic filter module is connected to the primary purification collection tank through a sixth pipe. The sixth pipe is equipped with a backflushing concentrate valve, a concentrate flow meter, and a concentrate pressure relief valve.

5. The aluminum removal and concentration system for chemical polishing waste liquid filtration according to claim 1, characterized in that, The aluminum removal system for chemical polishing waste liquid includes a plunger pump, a nanofiltration membrane, a filter, and a booster pump. The booster pump transports the chemical polishing waste liquid from the fine filtration chemical polishing waste liquid collection tank to the filter. The plunger pump transports the chemical polishing liquid filtered by the filter to the nanofiltration membrane. The chemical polishing liquid undergoes liquid-liquid separation through the nanofiltration membrane. The high-concentration chemical polishing liquid is transported to the high-concentration chemical polishing liquid collection tank or the fine filtration chemical polishing waste liquid collection tank for collection, while the low-concentration chemical polishing liquid is transported to the low-concentration chemical polishing liquid collection tank for storage.

6. The aluminum removal and concentration system for chemical polishing waste liquid filtration according to claim 5, characterized in that, The outlet of the filter is connected to the inlet of the plunger pump through a seventh pipe, and a low-pressure protection switch is provided on the seventh pipe. The outlet of the plunger pump is connected to the inlet of the nanofiltration membrane through an eighth pipe, and a raw water pressure relief valve is provided on the eighth pipe. The low-concentration outlet of the nanofiltration membrane is connected to the low-concentration chemical discharge collection tank through a ninth pipe, and a freshwater flow meter is installed on the ninth pipe.

7. The aluminum removal and concentration system for chemical polishing waste liquid filtration according to claim 6, characterized in that, The high-concentration outlet of the nanofiltration membrane is connected to the tenth pipe. The outlet end of the tenth pipe is provided with a first branch pipe and a second branch pipe. The outlet ends of the first and second branch pipes are connected to the eleventh pipe. The outlet end of the eleventh pipe is connected to the inlet of the T-shaped water regulating valve. One outlet of the T-shaped water regulating valve is connected to the inlet of the high-concentration chemical waste collection tank through the twelfth pipe, and the other outlet is connected to the inlet of the fine filtration chemical waste collection tank through the thirteenth pipe. The first branch pipe is provided with a second concentrate pressure relief valve and a pressure-holding valve. The second branch pipe is provided with a quick-flush valve. The eleventh pipe is provided with a second concentrate flow meter.

8. The aluminum removal and concentration system for chemical polishing waste liquid filtration according to claim 1, characterized in that, The acid circulation evaporation system includes a concentrated acid collection tank, a concentrated acid guide tank pump, a silicon carbide heat exchanger, a separation box, an acid circulation vertical pump, and a ventilation box. The concentrated acid guide tank pump delivers the chemical polishing liquid after aluminum ion removal to the concentrated acid collection tank for collection. The acid circulation vertical pump delivers the concentrated acid liquid from the concentrated acid collection tank to the silicon carbide heat exchanger for heating. The concentrated acid liquid heated by the silicon carbide heat exchanger is delivered to the separation box for separation of water and chemical polishing liquid. The ventilation box blows the separated water vapor out of the box.

9. The aluminum removal and concentration system for chemical polishing waste liquid filtration according to claim 8, characterized in that, Multiple diversion pipes are arranged at intervals on the inner side wall of the separation box. The outlet of each diversion pipe is connected to multiple atomizing branch pipes. Multiple atomizing nozzles are arranged at intervals on each atomizing branch pipe. The atomizing nozzles are arranged vertically downwards. The outlet of the silicon carbide heat exchanger is connected to each of the branch pipes through the fourteenth pipe. The acid circulation vertical pump is installed at the top of the concentrated acid collection tank. The inlet of the acid circulation vertical pump extends into the bottom of the concentrated acid collection tank. The outlet of the acid circulation vertical pump is connected to the inlet of the silicon carbide heat exchanger through the fifteenth pipe.

10. The aluminum removal and concentration system for chemical polishing waste liquid filtration according to claim 9, characterized in that, The ventilation box is divided by a middle partition to form an air inlet cavity and an air outlet cavity. An exhaust fan is installed in the air outlet cavity. An air inlet is provided on one side of the ventilation box corresponding to the air inlet cavity. An air filter mounting slot and a wind heater are provided at the air inlet. An air filter is installed in the air filter mounting slot. The air inlet is connected to the air inlet cavity. Both the air inlet cavity and the air outlet cavity are connected to the upper end of the separation box. The lower end of the separation box is connected to the concentrated acid collection tank. A first silicone plate is placed between the upper edge of the concentrated acid collection tank and the lower edge of the separation box. The upper edge of the concentrated acid collection tank and the lower edge of the separation box are fixed by screws and sealed with acidic glass glue. A second silicone plate is provided between the upper edge of the separation box and the lower edge of the ventilation box. The upper edge of the separation box and the lower edge of the ventilation box are fixed by screws and sealed with acidic glass glue. It also includes a bottom support, on which the concentrated acid collection tank, silicon carbide heat exchanger and concentrated acid guide tank pump are all mounted; the bottom of the bottom support is provided with multiple support feet spaced apart, each support foot including an adjusting screw and a screw, the screw being screwed to the adjusting screw, and rotating the adjusting screw can adjust the level of the bottom support.

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