Acid-containing wastewater treatment device

Abstract

The embodiment of the utility model discloses a treatment device for acid-containing wastewater. The treatment device comprises a wastewater tank, a filtering assembly, a diffusion dialysis assembly, a recovery liquid tank and an acid liquid treatment assembly, the inlet end of the filtering assembly is communicated with the wastewater tank; the diffusion dialysis assembly comprises a first-stage diffusion dialyzer, a first tank body, a second-stage diffusion dialyzer and a second tank body, the feed liquid chamber inlet end of the first-stage diffusion dialyzer is connected with the outlet end of the filtering assembly, and the feed liquid chamber outlet end of the first-stage diffusion dialyzer is connected with an inlet of the first tank body; an outlet of the first tank body is connected with an inlet end of a feed liquid chamber of the secondary diffusion dialyzer, and an outlet end of the feed liquid chamber of the secondary diffusion dialyzer is connected with an inlet of the second tank body; the recovery liquid tank is connected with the outlet end of the acid liquid chamber of the first-stage diffusion dialyzer and the outlet end of the acid liquid chamber of the second-stage diffusion dialyzer; and the acid liquor treatment assembly is connected with the outlet end of the recovery liquid tank. The wastewater is ingeniously subjected to dialysis treatment twice, so that the recovery amount of the acid content is increased, and the recycling of the recovered acid can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a treatment device for acid-containing wastewater. Background Art

[0002] Lithium iron phosphate batteries are currently widely used in electric vehicles and energy storage systems. The main reason for their popularity is their long life and high safety. Since this battery can withstand thousands of charge and discharge cycles, it provides a reliable energy storage solution, so it is suitable for applications that require long life and high safety. In addition, lithium iron phosphate batteries do not contain harmful heavy metal elements such as nickel and cobalt, so the negative impact on the environment is relatively small. However, the problem associated with its widespread application is the recycling and disposal of waste batteries.

[0003] Since the lithium, iron, phosphorus and other materials in lithium iron phosphate batteries can be reused, it can effectively reduce the waste of resources. For this reason, the wet recycling method is currently widely used to treat waste lithium iron phosphate batteries, that is, using strong acid to soak the lithium iron phosphate batteries to remove the CU contained in them. 2+ , Fe 2+ 、Ni 2+ 、Co 2+ , Mn 2+ Various heavy metal ions are leached out, and then specific selective cation exchange resins are used to carry out targeted removal of impure metal ions in the leaching solution, thereby realizing the recycling of lithium, iron, phosphorus and other materials. However, this treatment process requires a large amount of sulfuric acid for analysis and regeneration, and produces a large amount of resin desorption liquid. If the recycling of sulfuric acid cannot be achieved, the treatment cost will increase. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a treatment device for acid-containing wastewater.

[0005] The present application provides a device for treating acid-containing wastewater, comprising:

[0006] A wastewater tank, which is used to store acidic wastewater to be treated;

[0007] A filter assembly, the inlet end of which is connected to the wastewater tank, and is used to filter the acid-containing wastewater in the wastewater tank;

[0008] A diffusion dialysis assembly, comprising a primary diffusion dialyzer, a first tank, a secondary diffusion dialyzer and a second tank, wherein the feed and liquid chamber inlet end of the primary diffusion dialyzer is connected to the outlet end of the filtration assembly, the feed and liquid chamber outlet end of the primary diffusion dialyzer is connected to the inlet end of the first tank, the outlet of the first tank is connected to the feed and liquid chamber inlet end of the secondary diffusion dialyzer, and the feed and liquid chamber outlet end of the secondary diffusion dialyzer is connected to the inlet end of the second tank;

[0009] A recovery liquid tank connected to the acid liquid chamber outlet end of the primary diffusion dialyzer and the acid liquid chamber outlet end of the secondary diffusion dialyzer, and used for storing the acid liquid dialyzed from the primary diffusion dialyzer and the secondary diffusion dialyzer;

[0010] The acid liquid treatment component is connected to the outlet end of the recovery liquid tank and is used for treating the acid liquid in the recovery liquid tank.

[0011] In one embodiment, the acid treatment assembly includes an electrodialyzer, a first pump body, a concentrate tank, an extreme liquid tank, and a second pump body;

[0012] The first pump body is disposed on a first connecting pipeline connecting the recovery liquid tank and the electrodialyzer, and is used to pump the acid solution in the recovery liquid tank to the electrodialyzer;

[0013] The outlet of the concentration chamber of the electrodialyzer is connected to the concentrated liquid tank, the inlet of the polar liquid chamber of the electrodialyzer is connected to the polar liquid tank through a second connecting pipeline, and the outlet of the polar liquid chamber of the electrodialyzer is connected to the polar liquid tank through a third connecting pipeline;

[0014] The second pump body is arranged on the second connecting pipeline, and is used for pumping the polar liquid in the polar liquid tank into the electrodialyzer.

[0015] In one embodiment, the acid treatment component further includes a first safety filter and a second safety filter, and the first safety filter and the second safety filter are respectively arranged on the first connecting pipeline and the second connecting pipeline.

[0016] In one embodiment, the acid treatment component further includes a first heat exchanger and a second heat exchanger, and the first heat exchanger and the second heat exchanger are respectively arranged on the first connecting pipeline and the second connecting pipeline.

[0017] In one embodiment, the filter assembly includes a filter element, a filtrate tank, a third pump body and a fourth pump body. The filtrate tank is connected to the wastewater tank through a fourth connecting pipeline, and the inlet end of the feed chamber of the primary diffusion dialyzer is connected to the outlet of the filtrate tank through a fifth connecting pipeline. The filter element and the third pump body are arranged on the fourth connecting pipeline, and the fourth pump body is arranged on the fifth connecting pipeline, and is used to pump the liquid in the filtrate tank to the primary diffusion dialyzer.

[0018] In one embodiment, the filter assembly further includes a third safety filter, and the third safety filter is disposed on the fifth connecting pipeline.

[0019] In one embodiment, the diffusion dialysis component also includes a fifth pump body and a fourth safety filter, and the fifth pump body and the fourth safety filter are arranged on a sixth connecting pipeline connecting the first tank body and the secondary diffusion dialyzer, and the fifth pump body is used to pump the liquid in the first tank body into the secondary diffusion dialyzer.

[0020] In one embodiment, it also includes a pure water recovery component, which includes a pure water tank, a sixth pump body and a seventh pump body. The inlet of the pure water tank is connected to the pure water outlet of the acid treatment component through a seventh connecting pipe, the first outlet of the pure water tank is connected to the primary diffusion dialyzer through an eighth connecting pipe, and the second outlet of the pure water tank is connected to the secondary diffusion dialyzer through a ninth connecting pipe. The sixth pump body and the seventh pump body are respectively arranged on the eighth connecting pipe and the ninth connecting pipe to pump the pure water in the pure water tank to the primary diffusion dialyzer and the secondary diffusion dialyzer, respectively.

[0021] In one embodiment, the pure water recovery component further includes a fifth safety filter, and the fifth safety filter is arranged on the eighth connecting pipeline.

[0022] In one embodiment, the pure water recovery component further includes a sixth safety filter, and the sixth safety filter is arranged on the ninth connecting pipeline.

[0023] Compared with the prior art, the above technical solution provided by the embodiment of the present application has the following beneficial effects:

[0024] The acid-containing wastewater stored in the wastewater tank is filtered by a filtering component to filter out most of the fine impurities mixed in the acid-containing wastewater and pass it into a primary diffusion dialyzer, so that the acid-containing wastewater and pure water are countercurrently exchanged in the primary diffusion dialyzer, thereby turning the acid-containing wastewater into wastewater with extremely low acid content and flowing out from the feed liquid chamber of the primary diffusion dialyzer into the first tank body, while the acid flowing out from the acid liquid chamber of the primary diffusion dialyzer flows into the recovery liquid tank, and then the wastewater in the first tank body is passed into a secondary diffusion dialyzer for countercurrent exchange with pure water, so that the acid flowing out from the acid liquid chamber of the secondary diffusion dialyzer flows into the recovery tank, and finally the acid in the recovery liquid tank is treated by the acid liquid treatment component, the wastewater is cleverly dialyzed twice, the recovery amount of the acid content is increased, and the acid can be recycled after recovery, which can effectively save resources and reduce operating costs. At the same time, it can also simplify subsequent treatment procedures and has positive environmental protection significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment of a treatment device for acid-containing wastewater of the present application;

[0026] Figure 2 It is a structural schematic diagram of another embodiment of a treatment device for acid-containing wastewater of the present application.

[0027] Numbers in the figure:

[0028] 10. Wastewater tank; 20. Filter assembly; 21. Filter element; 22. Filtrate tank; 23. Third pump body; 24. Fourth pump body; 25. Third safety filter; 30. Diffusion dialysis assembly; 31. Primary diffusion dialyzer; 32. First tank body; 33. Secondary diffusion dialyzer; 34. Second tank body; 35. Fifth pump body; 36. Fourth safety filter; 40. Recovery tank; 50. Acid treatment assembly; 51. Electrodialyzer; 52. First pump body; 53. Second pump body; 54. Concentrate tank; 55. Extreme liquid tank; 56. First safety filter filter; 57, the second safety filter; 58, the first heat exchanger; 59, and the second heat exchanger; 60, the first connecting pipeline; 70, the second connecting pipeline; 80, the third connecting pipeline; 90, the fourth connecting pipeline; 100, the fifth connecting pipeline; 110, the sixth connecting pipeline; 120, the pure water recovery component; 121, the pure water tank; 122, the sixth pump body; 123, the seventh pump body; 124, the fifth safety filter; 125, the sixth safety filter; 130, the seventh connecting pipeline; 140, the eighth connecting pipeline; 150, the ninth connecting pipeline. DETAILED DESCRIPTION

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0030] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] Please refer to Figure 1 and Figure 2 An embodiment of the present application provides a treatment device for acid-containing wastewater, including a wastewater tank 10, a filtration zone, a diffusion dialysis component 30, a recovery liquid tank 40 and an acid solution treatment component 50.

[0032] Specifically, the wastewater tank 10 is used to store acidic wastewater to be treated. The inlet end of the filter assembly 20 is connected to the wastewater tank 10, and is used to filter the acidic wastewater in the wastewater tank 10. The diffusion dialysis assembly 30 includes a first-level diffusion dialyzer 31, a first tank body 32, a second-level diffusion dialyzer 33 and a second tank body 34, the feed liquid chamber inlet end of the first-level diffusion dialyzer 31 is connected to the outlet end of the filter assembly 20, the feed liquid chamber outlet end of the first-level diffusion dialyzer 31 is connected to the inlet of the first tank body 32, the outlet of the first tank body 32 is connected to the feed liquid chamber inlet end of the second-level diffusion dialyzer 33, and the outlet end of the feed liquid chamber of the second-level diffusion dialyzer 33 is connected to the inlet of the second tank body 34. The recovery liquid tank 40 is connected to the acid liquid chamber outlet end of the first-level diffusion dialyzer 31 and the acid liquid chamber outlet end of the second-level diffusion dialyzer 33, and is used to store the acid solution dialyzed from the first-level diffusion dialyzer 31 and the second-level diffusion dialyzer 33. The acid liquid treatment component 50 is connected to the outlet end of the recovery liquid tank 40 and is used to treat the acid liquid in the recovery liquid tank 40 .

[0033] For example, since the wastewater tank 10 is used to store acid-containing waste liquid, the wastewater tank 10 needs to be made of acid-resistant material and needs to have a certain strength to avoid the outflow of the acid-containing waste liquid due to collision during the storage process.

[0034] Exemplarily, the acid liquid treatment component 50 is used to further treat the dilute acid liquid precipitated by the primary diffusion dialyzer 31 and the secondary diffusion dialyzer 33 to form concentrated acid, so as to facilitate the subsequent use of the concentrated acid to treat the waste iron phosphate batteries, thereby realizing the recovery and reuse of the acid liquid, which is beneficial to saving operating costs.

[0035] It should be noted that the effects of the first-level diffusion dialyzer 31 and the second-level diffusion dialyzer 33 are to process the acid-containing waste liquid, so as to separate the acid contained in the waste liquid. The first-level diffusion dialyzer 31 and the second-level diffusion dialyzer 33 all adopt the same structure, wherein, taking the first-level diffusion dialyzer 31 as an example, its working process is described, specifically as follows: the acid-containing waste water (such as sulfuric acid) after filtration is passed into the feed liquid chamber of the first-level diffusion dialyzer 31, and pure water is allowed to flow through the acid liquid chamber of the first-level diffusion dialyzer 31 at the same time, so that the acid-containing waste water and pure water are countercurrently operated on both sides of the anion exchange membrane, and the anion exchange membrane is a positive charge, so the sulfate ion in the acid-containing waste water enters the acid liquid chamber after passing through the anion exchange membrane, because the hydrogen ion is directly smaller, and the material needs to keep electrical neutrality, thereby the hydrogen ion can also pass through the anion exchange membrane and enter the acid liquid chamber, so that the hydrogen ion and the sulfate ion are combined to form sulfuric acid, so that what flows out from the acid liquid chamber is sulfuric acid solution, and what flows out from the feed liquid chamber is the waste water with extremely low acid content.

[0036] The acid-containing wastewater treatment device based on the above technical features uses a filter assembly 20 to filter the acid-containing wastewater stored in the wastewater tank 10 to filter out most of the fine impurities mixed in the acid-containing wastewater and pass it into the primary diffusion dialyzer 31, so that the acid-containing wastewater and pure water are countercurrently exchanged in the primary diffusion dialyzer 31, and then the acid-containing wastewater is converted into wastewater with extremely low acid content and flows out of the feed liquid chamber of the primary diffusion dialyzer 31 into the first tank body 32, and the acid liquid flowing out of the acid liquid chamber of the primary diffusion dialyzer 31 flows into the recovery liquid tank 40. Then, the wastewater in the first tank body 32 is passed into the secondary diffusion dialyzer 33 for countercurrent exchange with pure water, so that the acid flowing out of the acid chamber of the secondary diffusion dialyzer 33 flows into the recovery tank, and finally the acid in the recovery tank 40 is treated by the acid treatment component 50. The wastewater is cleverly dialyzed twice, which increases the recovery amount of the acid content and can achieve the recycling of the acid after recovery, which can effectively save resources and reduce operating costs. At the same time, it can also simplify the subsequent treatment process and has positive environmental protection significance.

[0037] In one embodiment, the acid solution treatment assembly 50 includes an electrodialyzer 51, a first pump body 52, a concentrate tank 54, a pole liquid tank 55, and a second pump body 53. The first pump body 52 is disposed on a first connecting line 60 connecting the recovery liquid tank 40 and the electrodialyzer 51, and is used to pump the acid solution in the recovery liquid tank 40 to the electrodialyzer 51. The outlet of the concentration chamber of the electrodialyzer 51 is connected to the concentrate tank 54, the inlet of the pole liquid chamber of the electrodialyzer 51 is connected to the pole liquid tank 55 through a second connecting line 70, and the outlet of the pole liquid chamber of the electrodialyzer 51 is connected to the pole liquid tank 55 through a third connecting line 80. The second pump body 53 is disposed on the second connecting line 70, and is used to pump the pole liquid in the pole liquid tank 55 to the electrodialyzer 51.

[0038] It should be noted that the working process of the electrodialyzer 51 is as follows: the acid liquid (for example, dilute sulfuric acid) in the recovery liquid tank 40 is passed into the electrodialyzer 51 through the first connecting pipeline 60 under the action of the first pump body 52, and the acid liquid entering the electrodialyzer 51 flows through the desalination chamber and the concentrating chamber, and then under the action of the electric current, hydrogen ions and sulfate ions enter the concentrating chamber, and the desalinated liquid that contains almost no sulfuric acid enters the desalination chamber, so that the concentrated liquid with a high sulfuric acid concentration flows out of the concentrated acid chamber, and the desalinated liquid that contains almost no sulfuric acid flows out of the desalination chamber, thereby realizing the recovery and use of the acid, which can effectively reduce the damage of sulfuric acid and reduce the operating cost.

[0039] In one embodiment, the acid treatment assembly 50 further includes a first security filter 56 and a second security filter 57, which are respectively disposed on the first connecting pipeline 60 and the second connecting pipeline 70. In this way, the first security filter 56 and the second security filter 57 can filter the liquid before entering the primary diffusion dialyzer 31 and the secondary diffusion dialyzer 33, respectively, to filter out fine particles mixed in the liquid, thereby effectively protecting the primary diffusion dialyzer 31 and the secondary diffusion dialyzer 33.

[0040] In one embodiment, the acid treatment assembly 50 further includes a first heat exchanger 58 and a second heat exchanger 59 , and the first heat exchanger 58 and the second heat exchanger 59 are respectively disposed on the first connecting pipeline 60 and the second connecting pipeline 70 .

[0041] Exemplarily, since the electrodialyzer 51 will affect its operational stability when the temperature is too high, it is not conducive to dialysis treatment. To this end, in this embodiment, a first heat exchanger 58 and a second heat exchanger 59 are respectively arranged on the first connecting pipeline 60 and the second connecting pipeline 70, so that the temperature of the liquid before entering the electrodialyzer 51 from the first connecting pipeline 60 and the second connecting pipeline 70 can be respectively reduced, thereby effectively preventing the electrodialyzer 51 from operating at too high a temperature and affecting operational stability.

[0042] In one embodiment, the filter assembly 20 includes a filter element 21, a filtrate tank 22, a third pump body 23 and a fourth pump body 24. The filtrate tank 22 is connected to the wastewater tank through a fourth connecting line 90, and the inlet end of the liquid chamber of the primary diffusion dialyzer 31 is connected to the outlet of the filtrate tank 22 through a fifth connecting line 100. The filter element 21 and the third pump body 23 are arranged on the fourth connecting line 90, and the fourth pump body 24 is arranged on the fifth connecting line 100, and is used to pump the liquid in the filtrate tank 22 to the primary diffusion dialyzer 31.

[0043] Illustratively, under the action of the third pump body 23 and through the fourth connecting pipeline 90, the acid-containing wastewater to be treated stored in the wastewater tank flows toward the filtrate tank 22, and then flows into the filtrate tank 22 after being filtered by the filter element 21 to filter out large particle impurities contained in the wastewater, and then the filtered liquid is sent to the primary diffusion dialyzer 31 for treatment through the fourth pump body 24 and the fifth connecting pipeline 100, which can effectively prevent mixed particles from entering the primary diffusion dialyzer 31, causing damage to the ion exchange membrane in the primary diffusion dialyzer 31, thereby affecting the recovery and utilization of the acid.

[0044] It should be noted that the filter element 21 may be a component commonly used for filtering wastewater in the prior art (such as a filter), and this is not limited.

[0045] In one embodiment, the filter assembly 20 further includes a third safety filter 25 , and the third safety filter 25 is disposed on the fifth connecting pipeline 100 .

[0046] For example, under the action of the fourth pump body 24, the liquid in the filtrate tank 22 is passed into the primary diffusion dialyzer 31 through the fifth connecting pipeline 100. Since the liquid in the filtrate tank 22 may be mixed with fine particles, the ion exchange membrane in the primary diffusion dialyzer 31 may be easily damaged by friction under the action of the fine particles. Therefore, in this embodiment, a third security filter 25 is provided on the fifth connecting pipe to filter out the fine particles mixed in the liquid, thereby protecting the primary diffusion dialyzer 31.

[0047] In one embodiment, the diffusion dialysis assembly 30 also includes a fifth pump body 35 and a fourth safety filter 36, which are arranged on a sixth connecting line 110 connecting the first tank body 32 and the secondary diffusion dialyzer 33, and the fifth pump body 35 is used to pump the liquid in the first tank body 32 into the secondary diffusion dialyzer 33.

[0048] Exemplarily, when the acid-containing wastewater enters the primary diffusion dialyzer 31 and performs countercurrent exchange with pure water, the pure water becomes dilute acid liquid and flows into the recovery liquid tank 40, and the acid-containing wastewater becomes acid-free wastewater and flows into the first tank body 32, and then the acid-free wastewater in the first tank body 32 is passed into the secondary diffusion dialyzer 33 by the fifth pump body 35 to perform countercurrent exchange with pure water, so as to further precipitate the acid liquid remaining in the wastewater, thereby improving the recovery rate of the acid. In addition, the fourth security filter 36 can filter out fine impurity particles mixed in the waste liquid to avoid damage to the secondary diffusion filter.

[0049] In one embodiment, it also includes a pure water recovery component 120, which includes a pure water tank 121, a sixth pump body 122 and a seventh pump body 123. The inlet of the pure water tank 121 is connected to the pure water outlet of the acid treatment component 50 through the seventh connecting line 130, the first outlet of the pure water tank 121 is connected to the primary diffusion dialyzer 31 through the eighth connecting line 140, and the second outlet of the pure water tank 121 is connected to the secondary diffusion dialyzer 33 through the ninth connecting line 150. The sixth pump body 122 and the seventh pump body 123 are respectively arranged on the eighth connecting line 140 and the ninth connecting line 150 to pump the pure water in the pure water tank 121 into the primary diffusion dialyzer 31 and the secondary diffusion dialyzer 33, respectively.

[0050] Exemplarily, the acid treatment component 50 treats the waste liquid to form pure water, which is then introduced into the pure water tank 121 via the seventh connecting pipe 130, and then the sixth pump body 122 and the seventh pump body 123 are used to introduce the pure water into the primary diffusion dialyzer 31 and the secondary diffusion dialyzer 33 via the eighth connecting pipe 140 and the ninth connecting pipe 150, respectively, thereby realizing the recycling of pure water and effectively saving resources and operating costs.

[0051] In one embodiment, the pure water recovery component 120 further includes a fifth security filter 124, which is disposed on the eighth connecting pipeline 140. Thus, the fifth security filter 124 can filter out fine particles mixed in the pure water flowing through the eighth connecting pipeline 140, so as to avoid damage to the ion exchange membrane of the primary diffusion dialyzer 31.

[0052] In one embodiment, the pure water recovery component 120 further includes a sixth safety filter 125, which is disposed on the ninth connecting pipeline 150. Thus, the sixth safety filter 125 can filter out fine impurity particles mixed in the pure water to avoid damage to the ion exchange membrane of the secondary diffusion dialyzer 33.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A device for treating acidic wastewater, characterized in that: include: A wastewater tank (10) for storing acidic wastewater to be treated; A filter assembly (20), the inlet end of which is connected to the wastewater tank, and is used to filter the acid-containing wastewater in the wastewater tank (10); A diffusion dialysis assembly (30), comprising a primary diffusion dialyzer (31), a first tank body (32), a secondary diffusion dialyzer (33) and a second tank body (34), wherein the feed liquid chamber inlet end of the primary diffusion dialyzer (31) is connected to the outlet end of the filter assembly (20), the feed liquid chamber outlet end of the primary diffusion dialyzer (31) is connected to the inlet end of the first tank body (32), the outlet end of the first tank body (32) is connected to the feed liquid chamber inlet end of the secondary diffusion dialyzer (33), and the feed liquid chamber outlet end of the secondary diffusion dialyzer (33) is connected to the inlet end of the second tank body (34); A recovery liquid tank (40), which is connected to the acid liquid chamber outlet end of the primary diffusion dialyzer (31) and the acid liquid chamber outlet end of the secondary diffusion dialyzer (33), and is used to store the acid liquid dialyzed from the primary diffusion dialyzer (31) and the secondary diffusion dialyzer (33); An acid liquid treatment component (50) is connected to the outlet end of the recovery liquid tank (40) and is used to treat the acid liquid in the recovery liquid tank (40).

2. The acid wastewater treatment device according to claim 1, characterized in that: The acid solution treatment assembly (50) comprises an electrodialyser (51), a first pump body (52), a concentrate tank (54), an extreme liquid tank (55) and a second pump body (53); The first pump body (52) is disposed on a first connecting pipeline (60) connecting the recovery liquid tank (40) and the electrodialyzer (51), and is used to pump the acid solution in the recovery liquid tank (40) to the electrodialyzer (51); The outlet of the concentration chamber of the electrodialyzer (51) is connected to the concentrated liquid tank (54), the inlet of the polar liquid chamber of the electrodialyzer (51) is connected to the polar liquid tank (55) via a second connecting pipeline (70), and the outlet of the polar liquid chamber of the electrodialyzer (51) is connected to the polar liquid tank (55) via a third connecting pipeline (80); The second pump body (53) is arranged on the second connecting pipeline (70) and is used to pump the polar liquid in the polar liquid tank (55) into the electrodialyzer (51).

3. The acid wastewater treatment device according to claim 2, characterized in that: The acid treatment component (50) further comprises a first safety filter (56) and a second safety filter (57), wherein the first safety filter (56) and the second safety filter (57) are respectively arranged on the first connecting pipeline (60) and the second connecting pipeline (70).

4. The acid wastewater treatment device according to claim 3, characterized in that: The acid liquid treatment component (50) further comprises a first heat exchanger (58) and a second heat exchanger (59), wherein the first heat exchanger (58) and the second heat exchanger (59) are respectively arranged on the first connecting pipeline (60) and the second connecting pipeline (70).

5. The acid wastewater treatment device according to claim 1, characterized in that: The filter assembly (20) comprises a filter element (21), a filtrate tank (22), a third pump body (23) and a fourth pump body (24); the filtrate tank (22) is connected to the wastewater tank (10) via a fourth connecting pipeline (90); the inlet end of the feed liquid chamber of the primary diffusion dialyzer (31) is connected to the outlet of the filtrate tank (22) via a fifth connecting pipeline (100); the filter element (21) and the third pump body (23) are arranged on the fourth connecting pipeline (90); the fourth pump body (24) is arranged on the fifth connecting pipeline (100) and is used to pump the liquid in the filtrate tank (22) to the primary diffusion dialyzer (31).

6. The acid wastewater treatment device according to claim 5, characterized in that: The filter assembly (20) further comprises a third safety filter (25), wherein the third safety filter (25) is arranged on the fifth connecting pipeline (100).

7. The acid wastewater treatment device according to claim 1, characterized in that: The diffusion dialysis component (30) also includes a fifth pump body (35) and a fourth safety filter (36). The fifth pump body (35) and the fourth safety filter (36) are arranged on a sixth connecting pipeline (110) connecting the first tank body (32) and the secondary diffusion dialyzer (33). The fifth pump body (35) is used to pump the liquid in the first tank body (32) into the secondary diffusion dialyzer (33).

8. The device for treating acidic wastewater according to any one of claims 1 to 7, characterized in that: The invention also includes a pure water recovery component (120), wherein the pure water recovery component (120) includes a pure water tank (121), a sixth pump body (122) and a seventh pump body (123); the inlet of the pure water tank (121) is connected to the pure water outlet of the acid treatment component (50) via a seventh connecting pipeline (130); the first outlet of the pure water tank (121) is connected to the primary diffusion dialyzer (31) via an eighth connecting pipeline (140); the second outlet of the pure water tank (121) is connected to the secondary diffusion dialyzer (33) via a ninth connecting pipeline (150); the sixth pump body (122) and the seventh pump body (123) are respectively arranged on the eighth connecting pipeline (140) and the ninth connecting pipeline (150) to pump the pure water in the pure water tank (121) into the primary diffusion dialyzer (31) and the secondary diffusion dialyzer (33), respectively.

9. The acid wastewater treatment device according to claim 8, characterized in that: The pure water recovery component (120) further comprises a fifth safety filter (124), and the fifth safety filter (124) is arranged on the eighth connecting pipeline (140).

10. The acid wastewater treatment device according to claim 8, characterized in that: The pure water recovery component (120) further comprises a sixth safety filter (125), and the sixth safety filter (125) is arranged on the ninth connecting pipeline (150).

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