Ion exchange system for spent caustic extraction water in an alkaline extraction system

Abstract

The utility model discloses a kind of ion exchange systems of waste wash oil water in basic extraction system, including waste water main pipe, first ion exchange column, second ion exchange column and third ion exchange column;First ion exchange column is used to fill filter medium, second ion exchange column is used to fill copper-removing resin, and third ion exchange column is used to fill ammonia-nitrogen-removing resin;The outlet of waste water main pipe is communicated with the top inlet of first ion exchange column by first liquid inlet pipe;The bottom inlet and outlet of first ion exchange column are communicated with the top inlet of second ion exchange column by first communication pipe and second liquid inlet pipe in turn;The bottom inlet and outlet of second ion exchange column are communicated with the top inlet of third ion exchange column by second communication pipe and third liquid inlet pipe in turn;The bottom inlet and outlet of third ion exchange column are connected with third forward liquid outlet pipe.This ion exchange system proposed in the scheme is beneficial to remove Cu 2+ And ammonia-nitrogen amount in waste wash oil water, and structure is simple, convenient to use, and processing cost is low.

Description

Technical Field

[0001] This utility model relates to the field of ion exchange technology, and in particular to an ion exchange system for waste washing water in an alkaline extraction system. Background Technology

[0002] In the copper recycling industry, alkaline extraction systems are hydrometallurgical processes that selectively separate and enrich copper in copper-containing materials (such as copper smelting slag, waste circuit boards, electroplating sludge, etc.) under alkaline conditions using extractants. The core function is to achieve efficient separation of copper from impurities such as iron, aluminum, and silicon, providing high-purity copper-containing liquid for subsequent copper purification and recycling. These systems are widely used in the resource-based treatment of complex copper-containing waste.

[0003] The key auxiliary wash waters in the extraction system are oil wash water and acid wash water, which need to be replaced regularly. The oil wash water is alkaline, and its core indicator is Cu. 2+ The content is ≤5g / L, and it contains a certain amount of ammonia nitrogen. Direct discharge of the washing wastewater will cause serious environmental pollution: for example, alkaline wastewater will disrupt the acid-base balance of water bodies and soil, leading to the death of aquatic organisms and soil compaction; Cu 2+ Ammonia nitrogen is a heavy metal with bioaccumulation properties, which can harm human health through the food chain; it can also cause eutrophication of water bodies, leading to water pollution problems such as cyanobacterial blooms. Therefore, in current technologies, the wastewater from the replacement of washing oil is generally discharged to a sewage treatment plant for treatment, but this treatment method is costly and not conducive to meeting the needs of industrial production. Utility Model Content

[0004] The purpose of this invention is to provide an ion exchange system for waste wash water in an alkaline extraction system, which is beneficial for removing Cu from the waste wash water. 2+ It reduces ammonia nitrogen levels, has a simple structure, is easy to use, and has low processing costs, thus overcoming the shortcomings of existing technologies.

[0005] To achieve this objective, the present invention adopts the following technical solution: An ion exchange system for waste washing water in an alkaline extraction system includes a wastewater main pipe, a first ion exchange column, a second ion exchange column, and a third ion exchange column. Each of the first, second, and third ion exchange columns has a top inlet and a top outlet, and each of the first, second, and third ion exchange columns has a bottom inlet and outlet. The first ion exchange column is filled with filter media, the second ion exchange column is filled with copper removal resin, and the third ion exchange column is filled with ammonia nitrogen removal resin. The outlet of the wastewater main pipe is connected to the top inlet of the first ion exchange column through the first inlet pipe; The bottom inlet and outlet of the first ion exchange column are connected to the top inlet of the second ion exchange column in sequence through a first connecting pipe and a second liquid inlet pipe; The bottom inlet and outlet of the second ion exchange column are connected to the top inlet of the third ion exchange column in sequence through a second connecting pipe and a third inlet pipe; The bottom inlet and outlet of the third ion exchange column are connected to a third forward outlet pipe.

[0006] Preferably, it also includes a liquid storage tank, and the bottom of the liquid storage tank is provided with a liquid storage outlet, which is connected to a main liquid storage pipe; The outlet of the main liquid storage pipe is connected to the bottom inlet and outlet of the first ion exchange column in sequence through the first liquid delivery pipe and the first backflushing pipe. The top outlet of the first ion exchange column is connected to a first reverse outlet pipe.

[0007] Preferably, the outlet of the main liquid storage pipe is connected to the top inlet of the first ion exchange column in sequence through the first liquid delivery pipe and the first liquid inlet pipe; The bottom inlet and outlet of the first ion exchange column are connected to a first forward outlet pipe.

[0008] Preferably, the outlet of the main liquid storage pipe is connected to the bottom inlet and outlet of the second ion exchange column in sequence through the second liquid delivery pipe and the second backflushing pipe; The top outlet of the second ion exchange column is connected to a second reverse outlet pipe.

[0009] Preferably, the outlet of the main liquid storage pipe is connected to the top inlet of the second ion exchange column in sequence through the second liquid delivery pipe and the second liquid inlet pipe; The bottom inlet and outlet of the second ion exchange column are connected to a second forward outlet pipe.

[0010] Preferably, the outlet of the main liquid storage pipe is connected to the bottom inlet and outlet of the third ion exchange column in sequence through a third liquid delivery pipe and a third backflushing pipe; The top outlet of the third ion exchange column is connected to a third reverse outlet pipe.

[0011] Preferably, the outlet of the main liquid storage pipe is connected to the top inlet of the third ion exchange column via the third liquid delivery pipe and the third liquid inlet pipe in sequence.

[0012] Preferably, the wastewater main pipe is connected to a first flow meter, and the first flow meter is used to detect the outlet flow rate of the wastewater main pipe; the liquid storage main pipe is connected to a second flow meter, and the second flow meter is used to detect the outlet flow rate of the liquid storage main pipe; The first inlet pipe is connected to a pressure gauge, and the pressure gauge is used to detect the inlet pressure of the first inlet pipe.

[0013] Preferably, the wastewater main pipe is connected to a first pump, and the liquid storage main pipe is connected to a second pump.

[0014] Preferably, a stroller is also included; The first ion exchange column, the second ion exchange column, the third ion exchange column, and the storage tank are all mounted on the trolley.

[0015] The technical solution provided by this utility model can include the following beneficial effects: The ion exchange system of this scheme includes a first ion exchange column filled with filter media, a second ion exchange column filled with copper removal resin, and a third ion exchange column filled with ammonia nitrogen removal resin. This allows waste washing water to enter the ion exchange system from the wastewater main pipe and sequentially pass through the first, second, and third ion exchange columns for filtration and Cu removal. 2+ The process involves a forward treatment to remove ammonia nitrogen, and the copper-free and ammonia-nitrogen-free wash water obtained after this forward treatment flows out of the ion exchange system from the third forward outlet pipe of the third ion exchange column, ready for the next process. This ion exchange system has a simple structure and is easy to use. Compared to external discharge treatment, in-house treatment is less costly and effectively removes Cu from the waste wash water. 2+ The ammonia nitrogen content is sufficient to meet the needs of industrial production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the ion exchange system for waste washing oil in an alkaline extraction system according to this utility model.

[0017] Figure 2 This is a schematic diagram of the ion exchange system for waste washing oil in an alkaline extraction system according to this utility model, from another perspective.

[0018] Figure 3 This is a partial structural schematic diagram of the ion exchange system for waste washing oil in an alkaline extraction system according to this utility model.

[0019] Figure 4 This is a schematic diagram of the forward treatment process of the ion exchange system for waste washing oil in an alkaline extraction system according to this utility model.

[0020] Figure 5 This is a schematic diagram of the backflushing process of the first ion exchange column in the ion exchange system of the waste washing oil in an alkaline extraction system of this utility model.

[0021] Figure 6 This is a schematic diagram of the backflushing process of the second ion exchange column in the ion exchange system of the waste washing oil in an alkaline extraction system of this utility model.

[0022] Figure 7 This is a schematic diagram illustrating the regeneration process of the second ion exchange column in the ion exchange system of the waste washing oil in an alkaline extraction system according to this utility model.

[0023] Figure 8 This is a schematic diagram of the backflushing process of the third ion exchange column in the ion exchange system of the waste washing oil in an alkaline extraction system of this utility model.

[0024] Figure 9 This is a schematic diagram illustrating the regeneration process of the third ion exchange column in the ion exchange system of the waste washing oil in an alkaline extraction system according to this utility model.

[0025] Among them: wastewater main pipe 1, first connecting pipe 11, second connecting pipe 12; First ion exchange column 2, first inlet pipe 21, first delivery pipe 22, first backflushing pipe 23, first reverse outlet pipe 24, first forward outlet pipe 25; Second ion exchange column 3, second inlet pipe 31, second delivery pipe 32, second backflushing pipe 33, second reverse outlet pipe 34, second forward outlet pipe 35; The third ion exchange column 4, the third inlet pipe 41, the third delivery pipe 42, the third backflushing pipe 43, the third reverse outlet pipe 44, and the third forward outlet pipe 45; Storage tank 5, main storage pipe 51; First flow meter 61, second flow meter 62, pressure gauge 63, first pump 64, second pump 65; 7. Pushcart Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] This technical solution provides an ion exchange system for waste washing water in an alkaline extraction system, including a wastewater main pipe 1, a first ion exchange column 2, a second ion exchange column 3, and a third ion exchange column 4. Each of the first ion exchange column 2, the second ion exchange column 3, and the third ion exchange column 4 has a top inlet and a top outlet, and each of the first ion exchange column 2, the second ion exchange column 3, and the third ion exchange column 4 has a bottom inlet and outlet. The first ion exchange column 2 is used to fill a filter medium, the second ion exchange column 3 is used to fill copper removal resin, and the third ion exchange column 4 is used to fill ammonia nitrogen removal resin. The outlet of the wastewater main pipe 1 is connected to the top inlet of the first ion exchange column 2 through the first liquid inlet pipe 21; The bottom inlet and outlet of the first ion exchange column 2 are connected to the top inlet of the second ion exchange column 3 in sequence through the first connecting pipe 11 and the second liquid inlet pipe 31. The bottom inlet and outlet of the second ion exchange column 3 are connected to the top inlet of the third ion exchange column 4 in sequence through the second connecting pipe 12 and the third liquid inlet pipe 41. The bottom inlet and outlet of the third ion exchange column 4 are connected to a third forward outlet pipe 45.

[0028] In order to effectively remove Cu from waste washing water 2+ Regarding ammonia nitrogen levels, this technical solution proposes an ion exchange system for waste wash water in an alkaline extraction system, such as... Figure 1-3 As shown, the system includes a first ion exchange column 2 filled with filter media (such as quartz sand), a second ion exchange column 3 filled with copper removal resin, and a third ion exchange column 4 filled with ammonia nitrogen removal resin. This allows wastewater from the wastewater main pipe 1 to enter the ion exchange system and sequentially pass through the first ion exchange column 2, the second ion exchange column 3, and the third ion exchange column 4 for filtration and removal of Cu. 2+ The principle diagram of the forward treatment process for removing ammonia nitrogen is as follows: Figure 4 As shown, the copper-free and ammonia-free wash water obtained after forward treatment flows out of the ion exchange system from the third forward outlet pipe 45 of the third ion exchange column 4, so as to enter the next process. The ion exchange system of this scheme has a simple structure and is easy to use. Compared with external discharge treatment, the self-treatment cost is lower, and it can effectively remove Cu from the waste wash water. 2+ The ammonia nitrogen content is sufficient to meet the needs of industrial production.

[0029] Preferably, all pipes in this embodiment are equipped with ball valves to improve the controllability of the ion exchange system. Specifically, the wastewater main pipe 1 is equipped with ball valve #1, the first inlet pipe 21 is equipped with ball valve #2, the first connecting pipe 11 is equipped with ball valve #7, the second inlet pipe 31 is equipped with ball valve #8, the second connecting pipe 12 is equipped with ball valve #13, the third inlet pipe 41 is equipped with ball valve #14, and the third forward outlet pipe 45 is equipped with ball valve #16.

[0030] Furthermore, it also includes a liquid storage tank 5, and the bottom of the liquid storage tank 5 is provided with a liquid storage outlet, which is connected to a liquid storage main pipe 51; The outlet of the main liquid storage pipe 51 is connected to the bottom inlet and outlet of the first ion exchange column 2 in sequence through the first liquid delivery pipe 22 and the first backflushing pipe 23. The top outlet of the first ion exchange column 2 is connected to a first reverse outlet pipe 24.

[0031] In a preferred embodiment of this technical solution, after the ion exchange system has been used for a period of time, in order to facilitate the removal of contaminants trapped in the filter medium in the first exchange column 2, restore the filter porosity and water permeability, and avoid a decrease in filtration efficiency, an increase in system energy consumption, or contaminant leakage, this solution also designs a structure in the ion exchange system for backwashing the first exchange column 2. The backwashing process principle diagram is shown below. Figure 5 As shown.

[0032] Preferably, all pipes in this embodiment are equipped with ball valves to improve the controllability of the ion exchange system. Specifically, the main liquid storage pipe 51 is equipped with a #19 ball valve, the first liquid delivery pipe 22 is equipped with a #6 ball valve, the first backflushing pipe 23 is equipped with a #3 ball valve, and the first reverse outlet pipe 24 is equipped with a #5 ball valve.

[0033] To further explain, the outlet of the main liquid storage pipe 51 is connected to the top inlet of the first ion exchange column 2 in sequence through the first liquid delivery pipe 22 and the first liquid inlet pipe 21. The bottom inlet and outlet of the first ion exchange column 2 are connected to a first forward outlet pipe 25.

[0034] As a further improvement of the above embodiment, in order to achieve deep cleaning of the filter medium in the first exchange column 2, this solution also designs a structure in the ion exchange system for achieving forward flushing of the first exchange column 2, so that the clean water stored in the storage tank 5 enters the top inlet of the first ion exchange column 2 sequentially through the first liquid delivery pipe 22 and the first liquid inlet pipe 21, and then flows out of the first ion exchange column 2 from the first forward liquid outlet pipe 25, so as to extend the service life of the filter medium in the first ion exchange column 2.

[0035] Preferably, in this embodiment, the first forward outlet pipe 25 is equipped with a #4 ball valve to improve the controllability of the ion exchange system.

[0036] To further explain, the outlet of the main liquid storage pipe 51 is connected to the bottom inlet and outlet of the second ion exchange column 3 in sequence through the second liquid delivery pipe 32 and the second backflushing pipe 33; The top outlet of the second ion exchange column 3 is connected to a second reverse outlet pipe 34.

[0037] In another preferred embodiment of this technical solution, after the ion exchange system has been used for a period of time, in order to facilitate the removal of physical impurities on the surface and within the pores of the copper-removing resin in the second exchange column 3, restore the water permeability and exposure of adsorption active sites of the copper-removing resin, and lay the foundation for subsequent adsorption / regeneration processes, this solution designs a structure in the ion exchange system for backflushing the second exchange column 3. The schematic diagram of the backflushing process is shown below. Figure 6 As shown.

[0038] Preferably, all pipes in this embodiment are equipped with ball valves to improve the controllability of the ion exchange system. Specifically, the second liquid delivery pipe 32 is equipped with a #12 ball valve, the second backflushing pipe 33 is equipped with a #9 ball valve, and the second reverse liquid outlet pipe 34 is equipped with a #11 ball valve.

[0039] To further explain, the outlet of the main liquid storage pipe 51 is connected to the top inlet of the second ion exchange column 3 in sequence through the second liquid delivery pipe 32 and the second liquid inlet pipe 31; The bottom inlet and outlet of the second ion exchange column 3 are connected to a second forward outlet pipe 35.

[0040] To facilitate the regeneration of the copper-removing resin in the second ion exchange column 3 and restore its ability to adsorb copper, this design also includes a structure within the ion exchange system for regenerating the second ion exchange column 3. The acid stored in the storage tank 5 sequentially enters the top inlet of the second ion exchange column 3 through the second delivery pipe 32 and the second inlet pipe 31, and then flows out of the second ion exchange column 3 from the second forward outlet pipe 35. The principle diagram of the regeneration process is shown below. Figure 7 As shown.

[0041] Preferably, in this embodiment, the second forward outlet pipe 35 is equipped with a #10 ball valve to improve the controllability of the ion exchange system.

[0042] To further explain, the outlet of the main liquid storage pipe 51 is connected to the bottom inlet and outlet of the third ion exchange column 4 in sequence through the third liquid delivery pipe 42 and the third backflushing pipe 43; The top outlet of the third ion exchange column 4 is connected to a third reverse outlet pipe 44.

[0043] In another preferred embodiment of this technical solution, after the ion exchange system has been used for a period of time, in order to facilitate the removal of physical impurities from the surface and pores of the ammonia-removing nitrogen resin in the third exchange column 4, restore the water permeability and exposure of adsorption active sites of the ammonia-removing nitrogen resin, and lay the foundation for subsequent adsorption / regeneration processes, this solution also designs a structure in the ion exchange system for backflushing the third exchange column 4. The schematic diagram of the backflushing process is shown below. Figure 8 As shown.

[0044] Preferably, all pipes in this embodiment are equipped with ball valves to improve the controllability of the ion exchange system. Specifically, the third liquid delivery pipe 42 is equipped with an 18# ball valve, the third backflushing pipe 43 is equipped with a 15# ball valve, and the third reverse liquid outlet pipe 44 is equipped with a 17# ball valve.

[0045] To further explain, the outlet of the main liquid storage pipe 51 is connected to the top inlet of the third ion exchange column 4 in sequence through the third liquid delivery pipe 42 and the third liquid inlet pipe 41.

[0046] To facilitate the regeneration of the ammonia nitrogen removal resin in the third exchange column 4 and restore its ammonia nitrogen adsorption capacity, this scheme also includes a structure designed in the ion exchange system for regenerating the third exchange column 4. Acid stored in the storage tank 5 sequentially enters the top inlet of the third ion exchange column 4 through the third delivery pipe 42 and the third inlet pipe 41, and then flows out of the third ion exchange column 4 from the third forward outlet pipe 45. The principle diagram of the regeneration process is shown below. Figure 9 As shown.

[0047] It should be further explained that, thanks to the structural design of this solution, the forward and reverse rinsing processes of the first ion exchange column 2, the backflushing and regeneration processes of the second ion exchange column 3, and the backflushing and regeneration processes of the third ion exchange column 4 can all be carried out in the same storage tank 5, thereby simplifying the structure of the ion exchange system and saving equipment costs.

[0048] To further explain, the wastewater main pipe 1 is connected to a first flow meter 61, and the first flow meter 61 is used to detect the outlet flow rate of the wastewater main pipe 1; the liquid storage main pipe 51 is connected to a second flow meter 62, and the second flow meter 62 is used to detect the outlet flow rate of the liquid storage main pipe 51. The first inlet pipe 21 is connected to a pressure gauge 63, which is used to detect the inlet pressure of the first inlet pipe 21. This facilitates monitoring the flow rate of the forward processing, backflushing, and regeneration processes, as well as the pressure during the forward processing, thereby further improving the controllability of the ion exchange system.

[0049] To further explain, the wastewater main pipe 1 is connected to a first pump 64, and the liquid storage main pipe 51 is connected to a second pump 65.

[0050] To elaborate further, it also includes stroller 7; The first ion exchange column 2, the second ion exchange column 3, the third ion exchange column 4, and the storage tank 5 are all mounted on the trolley 7. This facilitates the movement of the ion exchange system.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0053] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0056] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0057] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. An ion exchange system for waste wash water in an alkaline extraction system, characterized in that: The system includes a wastewater main pipe, a first ion exchange column, a second ion exchange column, and a third ion exchange column. Each of the first, second, and third ion exchange columns has a top inlet and a top outlet, and each has a bottom inlet and outlet. The first ion exchange column is filled with filter media, the second ion exchange column is filled with copper removal resin, and the third ion exchange column is filled with ammonia nitrogen removal resin. The outlet of the wastewater main pipe is connected to the top inlet of the first ion exchange column through the first inlet pipe; The bottom inlet and outlet of the first ion exchange column are connected to the top inlet of the second ion exchange column in sequence through a first connecting pipe and a second liquid inlet pipe; The bottom inlet and outlet of the second ion exchange column are connected to the top inlet of the third ion exchange column in sequence through a second connecting pipe and a third inlet pipe; The bottom inlet and outlet of the third ion exchange column are connected to a third forward outlet pipe.

2. The ion exchange system for waste wash water in an alkaline extraction system according to claim 1, characterized in that: It also includes a liquid storage tank, and the bottom of the liquid storage tank is provided with a liquid storage outlet, which is connected to a main liquid storage pipe; The outlet of the main liquid storage pipe is connected to the bottom inlet and outlet of the first ion exchange column in sequence through the first liquid delivery pipe and the first backflushing pipe. The top outlet of the first ion exchange column is connected to a first reverse outlet pipe.

3. The ion exchange system for waste wash water in an alkaline extraction system according to claim 2, characterized in that: The outlet of the main liquid storage pipe is connected to the top inlet of the first ion exchange column in sequence through the first liquid delivery pipe and the first liquid inlet pipe. The bottom inlet and outlet of the first ion exchange column are connected to a first forward outlet pipe.

4. The ion exchange system for waste wash water in an alkaline extraction system according to claim 2, characterized in that: The outlet of the main liquid storage pipe is connected to the bottom inlet and outlet of the second ion exchange column in sequence through the second liquid delivery pipe and the second backflushing pipe. The top outlet of the second ion exchange column is connected to a second reverse outlet pipe.

5. The ion exchange system for waste wash water in an alkaline extraction system according to claim 4, characterized in that: The outlet of the main liquid storage pipe is connected to the top inlet of the second ion exchange column in sequence through the second liquid delivery pipe and the second liquid inlet pipe; The bottom inlet and outlet of the second ion exchange column are connected to a second forward outlet pipe.

6. The ion exchange system for waste wash water in an alkaline extraction system according to claim 2, characterized in that: The outlet of the main liquid storage pipe is connected to the bottom inlet and outlet of the third ion exchange column in sequence through the third liquid delivery pipe and the third backflushing pipe. The top outlet of the third ion exchange column is connected to a third reverse outlet pipe.

7. The ion exchange system for waste wash water in an alkaline extraction system according to claim 6, characterized in that: The outlet of the main liquid storage pipe is connected to the top inlet of the third ion exchange column via the third liquid delivery pipe and the third liquid inlet pipe.

8. The ion exchange system for waste wash water in an alkaline extraction system according to claim 2, characterized in that: The wastewater main pipe is connected to a first flow meter, which is used to detect the outlet flow rate of the wastewater main pipe; the liquid storage main pipe is connected to a second flow meter, which is used to detect the outlet flow rate of the liquid storage main pipe. The first inlet pipe is connected to a pressure gauge, and the pressure gauge is used to detect the inlet pressure of the first inlet pipe.

9. The ion exchange system for waste wash water in an alkaline extraction system according to claim 2, characterized in that: The wastewater main pipe is connected to a first pump, and the liquid storage main pipe is connected to a second pump.

10. An ion exchange system for waste wash water in an alkaline extraction system according to claim 2, characterized in that: It also includes a stroller; The first ion exchange column, the second ion exchange column, the third ion exchange column, and the storage tank are all mounted on the trolley.

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