Resin tower

Abstract

The utility model discloses a resin tower, and relates to the technical field of lithium battery recovery hydrometallurgy waste water, the resin tower comprises a tower body, a plurality of baffle plates are installed in the tower body, the plurality of baffle plates are arranged on the inner wall surface of the tower body, the plurality of baffle plates are mutually spaced and staggered, each baffle plate comprises a fixed plate and a baffle plate, and the baffle plate is connected with the fixed plate. According to the technical scheme, the multiple baffles are installed in the tower body, the multiple baffles are arranged on the inner wall face of the tower body, the multiple baffles are arranged at intervals in a staggered mode, and the fixing plates of the baffles are installed on the inner wall face of the tower body and extend in the direction close to the central axis of the tower body; a blocking plate of the baffle is connected with the fixing plate, and the blocking plate extends in the height direction of the tower body; through the arrangement, the flowing path of the wastewater in the tower body is increased, and the resin can be in contact with the wastewater at the baffle so as to prolong the contact time of the resin and the wastewater, so that the resin and the wastewater react more sufficiently.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery recycling of hydrometallurgical wastewater, and in particular to a resin tower. Background Technology

[0002] A resin tower is a commonly used device for separating, purifying, and treating substances. The tower is filled with resin, a polymer with a highly cross-linked structure, possessing a large specific surface area and abundant active sites. This resin can adsorb and capture target substances and separate them from other substances.

[0003] Most existing resin towers are simply tanks into which liquids and resins are poured, and the resins and liquids react in contact within the tank. However, in actual production processes, these existing resin towers often experience short solid-liquid contact times and incomplete reactions, leading to substandard wastewater treatment and difficulties in discharge. Utility Model Content

[0004] The main purpose of this invention is to propose a resin tower that addresses the problem of short solid-liquid contact time and incomplete reaction that often occurs in existing resin towers.

[0005] To achieve the above objectives, the present invention proposes a resin tower, comprising a tower body, wherein multiple baffles are installed inside the tower body, the multiple baffles are disposed on the inner wall surface of the tower body, and the multiple baffles are spaced apart from each other and staggered. Each baffle includes a fixing plate and a barrier plate. The fixing plate is installed on the inner wall surface of the tower body and extends in a direction close to the central axis of the tower body. The barrier plate is connected to the fixing plate and extends in the height direction of the tower body.

[0006] In some embodiments, the baffle includes a plurality of first baffles and a plurality of second baffles, both of which are disposed on the inner wall surface of the tower body. The first baffles and the second baffles are disposed opposite to each other and spaced apart.

[0007] In some embodiments, the baffle plate of the first baffle is located above the fixing plate of the second baffle; there is a flow channel between the first baffle and the second baffle, the flow channel being S-shaped.

[0008] In some embodiments, a wastewater inlet pipe is installed at the top of the tower body, and an outlet is provided at the bottom of the tower body;

[0009] The resin tower also includes a reflux device, which is located on one side of the tower body and is connected to the tower body.

[0010] In some embodiments, the reflux device includes a water storage tank and a first inlet pipe. The water storage tank is located on one side of the tower body, and the first inlet pipe is located at the top of the tower body and is disposed opposite to the wastewater inlet pipe. The first inlet pipe connects the water storage tank and the tower body.

[0011] In some embodiments, the reflux device further includes a second inlet pipe and a booster pump, wherein the second inlet pipe is located at the bottom of the tower body and is connected to the water storage tank; and the booster pump is located in the second inlet pipe.

[0012] In some embodiments, the reflux device further includes a third inlet pipe, which is connected to the water storage tank;

[0013] The first water inlet pipe, the second water inlet pipe, and the third water inlet pipe are all equipped with water inlet valves.

[0014] In some embodiments, the reflux device further includes a first outlet pipe and a second outlet pipe, wherein the first outlet pipe is connected to the first inlet pipe and the water storage tank; and the second outlet pipe is connected to the second inlet pipe and the water storage tank.

[0015] Both the first and second water outlet pipes are equipped with water outlet valves.

[0016] In some embodiments, the outlet is equipped with a rotatable and adjustable first filter screen switch, the wastewater inlet pipe is equipped with a second filter screen switch, and the first inlet pipe is equipped with a third filter screen switch.

[0017] In some embodiments, the first filter switch, the second filter switch, and the third filter switch all include a sealing plate and a rotating plate. The sealing plate is provided with filter holes, and the rotating plate is rotatably disposed relative to the sealing plate. The rotating plate is provided with through holes corresponding to the filter holes.

[0018] The technical solution of this utility model involves installing multiple baffles inside the tower body. These baffles are located on the inner wall of the tower body and are spaced apart and staggered. Each baffle includes a fixed plate and a barrier plate. The fixed plate is installed on the inner wall of the tower body and extends towards the central axis of the tower body. The barrier plate is connected to the fixed plate and extends along the height of the tower body. This arrangement increases the path of wastewater flow within the tower body and allows the resin to come into contact with the wastewater at the baffles, thereby prolonging the contact time between the resin and the wastewater and resulting in a more complete reaction between the resin and the wastewater. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the resin tower provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the tower body provided by this utility model;

[0022] Figure 3 A schematic diagram of an embodiment of the second filter switch provided by this utility model.

[0023] Explanation of icon numbers:

[0024] 100. Resin tower; 10. Tower body; 11. Wastewater inlet pipe; 12. Outlet; 20. Baffle; 21. Fixing plate; 22. Barrier plate; 23. First baffle; 24. Second baffle; 25. Flow channel;

[0025] 30. Recirculation device; 31. Water storage tank; 310. Booster pump; 32. First inlet pipe; 33. Second inlet pipe; 34. Third inlet pipe; 40. Inlet valve;

[0026] 35. First water outlet pipe; 36. Second water outlet pipe; 50. Water outlet valve; 37. First filter screen switch; 38. Second filter screen switch; 380. Rotating plate; 381. Through hole; 39. Third filter screen switch.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are 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 with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] A resin tower is a commonly used device for separating, purifying, and treating substances. The tower is filled with resin, a polymer with a highly cross-linked structure, possessing a large specific surface area and abundant active sites. This resin can adsorb and capture target substances and separate them from other substances.

[0032] Most existing resin towers are simply tanks into which liquids and resins are poured, and the resins and liquids react in contact within the tank. However, in actual production processes, these existing resin towers often experience short solid-liquid contact times and incomplete reactions, leading to substandard wastewater treatment and difficulties in discharge.

[0033] This utility model proposes a resin tower 100. Please refer to [link / reference needed]. Figure 1 and Figure 2 In one embodiment of this utility model, the resin tower 100 proposed by this utility model includes a tower body 10. A plurality of baffles 20 are installed inside the tower body 10. The plurality of baffles 20 are disposed on the inner wall surface of the tower body 10 and are spaced apart and staggered. Each baffle 20 includes a fixing plate 21 and a barrier plate 22. The fixing plate 21 is installed on the inner wall surface of the tower body 10 and extends toward the central axis of the tower body 10. The barrier plate 22 is connected to the fixing plate 21 and extends in the height direction of the tower body 10.

[0034] The baffle 20 is fixed to the inner wall of the tower body 10 by the fixing plate 21, so that when the wastewater flows down into the tower body 10, the wastewater can react with the resin on the fixing plate 21.

[0035] Multiple baffles 20 are arranged vertically at intervals, with adjacent baffles 20 positioned opposite each other. This arrangement allows wastewater to flow down after passing through one baffle 20, reaching the fixed plate 21 of the next baffle 20. This allows the wastewater to continue reacting with the resin on the fixed plate 21 of the next baffle 20. The baffles 20 have a T-shaped structure, and the fixed plate 21 extends beyond the central axis of the tower body 10, increasing the wastewater's flow path and prolonging the contact time between the wastewater and the resin on the fixed plate 21, thus ensuring a more complete reaction between the resin and wastewater.

[0036] The barrier plate 22 is connected to the fixed plate 21, and the barrier plate 22 extends in the height direction of the tower body 10. It can not only slow down the flow speed of wastewater on the fixed plate 21, but also extend the contact time between wastewater and resin on the fixed plate 21 by blocking the flow.

[0037] The main methods to address incomplete resin reaction are as follows: (1) Increase the amount of catalyst used: Ensure sufficient catalyst activity and appropriate dosage to accelerate and promote the resin curing reaction. (2) Increase the ambient temperature: Use heating equipment or increase the room temperature to ensure that the temperature inside the tank meets the requirements for resin curing. (3) Extend the reaction time: Ensure that the resin has enough time to cure and avoid incomplete reaction. (4) Filter impurities: Filter the resin through a sieve before use to remove impurities and reduce the impact on the chemical reaction. (5) Precise proportioning: Use a precision electronic scale to accurately measure the proportion of resin and curing agent to ensure the smooth progress of the chemical reaction.

[0038] All of the above methods require adding new processes or increasing the amount of catalyst added to the existing processes. Although they can improve the resin reaction efficiency, they also increase production costs or make precise control more difficult.

[0039] The technical solution of this utility model employs multiple baffles 20 installed inside the tower body 10. These baffles 20 are located on the inner wall of the tower body 10 and are spaced apart and staggered. Each baffle 20 includes a fixing plate 21 and a barrier plate 22. The fixing plate 21 is installed on the inner wall of the tower body 10 and extends towards the central axis of the tower body 10. The barrier plate 22 is connected to the fixing plate 21 and extends along the height of the tower body 10. This arrangement increases the path of wastewater flow within the tower body 10, allowing the resin to contact the wastewater at the baffles 20, thus prolonging the contact time between the resin and wastewater, resulting in a more complete reaction and improved reaction efficiency. Furthermore, the resin tower 100 of this utility model does not require the addition of any other substances to achieve the desired reaction effect, thereby reducing operating costs while ensuring smooth production.

[0040] Specifically, in one embodiment, the baffle 20 includes a plurality of first baffles 23 and a plurality of second baffles 24. The first baffles 23 and the second baffles 24 are both disposed on the inner wall surface of the tower body 10. The first baffles 23 and the second baffles 24 are disposed opposite to each other and are spaced apart.

[0041] Please see Figure 2 The first baffle 23 and the second baffle 24 are arranged vertically at intervals, with the first baffle 23 and the second baffle 24 arranged opposite each other. With this arrangement, the wastewater continues to flow downwards after flowing through the first baffle 23, and can flow into the fixing plate 21 of the second baffle 24, so that the wastewater can continue to react with the resin on the fixing plate 21 of the next baffle 20.

[0042] In one embodiment, the length of the fixed plate 21 may extend beyond the central axis of the tower body 10 to increase the contact volume and contact time between the wastewater and the resin at the fixed plate 21, thereby allowing the resin and wastewater to react more fully. The barrier plate 22 of the first baffle 23 is located above the fixed plate 21 of the second baffle 24; a flow channel 25 is provided between the first baffle 23 and the second baffle 24, the flow channel 25 being S-shaped to slow down the flow velocity of the wastewater within the tower body 10, thereby prolonging the contact time between the wastewater and the resin at the fixed plates 21 of the first baffle 23 and the second baffle 24.

[0043] In one embodiment, a wastewater inlet pipe 11 is installed at the top of the tower body 10. Wastewater enters the tower body 10 through the wastewater inlet pipe 11 to react with the resin inside the tower body 10. After the wastewater reacts with the resin, the resulting acidic solution needs to be discharged from the tower body 10 or recycled. Specifically, an outlet 12 is provided at the bottom of the tower body 10, from which the acidic solution can flow out. The wastewater can be waste acid. The adsorption process inside the resin tower 100 is as follows: wastewater enters the tower body 10 through the waste acid inlet pipe, and the resin inside the tower body 10 adsorbs impurities in the waste acid, such as iron ions; then, the acidic solution obtained from the reaction of the wastewater and the resin is discharged from the outlet 12. Since the baffle 20 of the tower body 10 has a T-shaped structure, it increases the path of the wastewater flow within the tower body 10, prolonging the contact time between the wastewater and the resin on the fixed plate 21, thereby allowing the resin and wastewater to react more fully and improving the removal rate of ferric ions from the waste acid.

[0044] After the acidic water is discharged from outlet 12, water needs to be injected into the tower body 10 for desorption to wash away impurities adsorbed by the resin, such as iron ions adsorbed by the resin. In one embodiment, the resin tower 100 further includes a reflux device 30, which is located on one side of the tower body 10 and is connected to the tower body 10. The reflux device 30 can transport water stored in the reflux device 30 to the tower body 10 for cleaning.

[0045] The water stored in the reflux device 30 is the cleaning water from the previous cleaning of the tower body 10, which contains relatively few impurities. Specifically, the cleaning water stored in the reflux device 30 can be desorbed and cleaned in the tower body 10. After this cleaning water contains more impurities, it can be discharged.

[0046] Afterwards, the tower body 10 can be washed with water. Specifically, pure water is injected into the reflux device 30 and then transported to the tower body 10 through the reflux device 30 to wash the resin in the tower body 10 again. The impurity content of the washing water after washing is reduced and meets the resin protection liquid standard. The washing water can then be recycled back to the reflux device 30 for reuse, so that the washing water stored in the reflux device 30 can be used in the next round to desorb and clean the resin that has adsorbed iron ions.

[0047] In one embodiment, a reflux device 30 is added to one side of the tower body 10, which can recover the washing water after washing, which has reduced impurity content and meets the resin protection liquid standard, thereby reducing the amount of pure water used.

[0048] Furthermore, in order to input the cleaning water that meets the resin protective liquid standard into the reflux device 30 for recycling, the reflux device 30 includes a water storage tank 31 and a first water inlet pipe 32. The water storage tank 31 is located on one side of the tower body 10, and the first water inlet pipe 32 is located at the top of the tower body 10 and is arranged opposite to the wastewater inlet pipe 11. The first water inlet pipe 32 connects the water storage tank 31 and the tower body 10.

[0049] Understandably, the cleaning water flows from bottom to top in the tower body 10, while the wastewater flows from top to bottom in the tower body 10.

[0050] In this embodiment, the outlet 12 can be sealed first, allowing the washing water with low impurity content inside the tower body 10 to flow into the water storage tank 31 through the first inlet pipe 32, so that the water storage tank 31 can recycle the washing water with low impurity content. Furthermore, to prevent the first inlet pipe 32 from obstructing the wastewater inlet pipe 11, the first inlet pipe 32 and the wastewater inlet pipe 11 are arranged opposite each other. In one embodiment, the wastewater inlet pipe 11 is located on the left side of the tower body 10, and the first inlet pipe 32 is located on the right side of the tower body 10.

[0051] To facilitate the delivery of the cleaning water stored in the reflux device 30 to the tower body 10, the reflux device 30 further includes a second inlet pipe 33 and a booster pump 310. The second inlet pipe 33 is located at the bottom of the tower body 10 and connects to the water storage tank 31; the booster pump 310 is located in the second inlet pipe 33. The booster pump 310 is configured to pump the cleaning water flowing out of the reflux device 30 into the tower body 10.

[0052] In order to input pure water into the water storage tank 31, the reflux device 30 also includes a third water inlet pipe 34, which is connected to the water storage tank 31; the first water inlet pipe 32, the second water inlet pipe 33 and the third water inlet pipe 34 are all equipped with water inlet valves 40.

[0053] An external pipe can be connected to the third inlet pipe 34 to input pure water. Pure water enters through the third inlet pipe 34 and flows into the water storage tank 31. The third inlet pipe 34 is equipped with an inlet valve 40. After the resin in the tower body 10 completes adsorption and the first desorption, the inlet valve 40 at the third inlet pipe can be opened, allowing pure water to enter the water storage tank 31. Then, the pressure pump 310 operates to pump the pure water in the water storage tank 31 into the tower body 10 from the second inlet pipe 33.

[0054] In some embodiments, to discharge the cleaning water from the first desorption process within the tower body 10, the reflux device further includes a first outlet pipe 35, which connects to the first inlet pipe 32 and the water storage tank 31. The cleaning water from the first desorption process within the tower body 10 can then be discharged through the first outlet pipe 35.

[0055] Furthermore, the reflux device also includes a second water outlet pipe 36, which connects to the second water inlet pipe and the water storage tank. The cleaning water stored in the reflux device 30 can be discharged from the second water outlet pipe 36 to promptly remove any cleaning water that has become spoiled and smelly due to prolonged storage. Both the first water outlet pipe 35 and the second water outlet pipe 36 are equipped with water outlet valves 50 to control their opening and closing.

[0056] In one embodiment, the inlet valve 40 of the first inlet pipe 32 is located at the top of the water storage tank 31 and does not affect the discharge of cleaning water from the first outlet pipe 35.

[0057] Optionally, the inlet valve 40 of the first inlet pipe 32 is located on the branch where the first inlet pipe 32 and the water storage tank 31 are located, to control the entry of the cleaning water from the tower body 10 into the water storage tank 31. The inlet valve 40 of the first inlet pipe 32 is not located on the branch where the first inlet pipe 32 and the first outlet pipe 35 are located, to avoid the situation where the cleaning water containing a large amount of impurities in the tower body 10 cannot flow out from the first outlet pipe 35. Optionally, the second inlet pipe 33 can be inclined so that the cleaning water in the second inlet pipe 33 can be discharged from the second outlet pipe 36.

[0058] In one embodiment, the outlet 12 is provided with a rotatable and adjustable first filter screen switch 37, the wastewater inlet pipe 11 is equipped with a second filter screen switch 38, and the first water inlet pipe 32 is equipped with a third filter screen switch 39.

[0059] When acidic water needs to be discharged from the tower body 10, the first filter screen switch 37 can be rotated to open the first filter screen switch 37, allowing acidic water to flow out from the outlet 12. When wastewater needs to be input into the tower body 10, the second filter screen switch 38 can be rotated to open the second filter screen switch 38, thereby allowing wastewater to enter the tower body 10.

[0060] When it is necessary to discharge cleaning water with a high impurity content from the first water inlet pipe 32, or when it is necessary to input cleaning water that meets the resin protective liquid standard from the first water inlet pipe 32 into the water storage tank 31, the third filter screen switch 39 can be turned to open the second filter screen switch 38, thereby facilitating the flow of cleaning water with a high impurity content or cleaning water that meets the resin protective liquid standard into the first water inlet pipe 32.

[0061] In some implementations, please refer to Figure 3 The first filter switch 37, the second filter switch 38, and the third filter switch 39 each include a sealing plate and a rotating plate 380. The sealing plate is provided with filter holes, and the rotating plate 380 is rotatably disposed relative to the sealing plate. The rotating plate 380 is provided with a through hole 381 corresponding to the filter holes.

[0062] The first filter switch 37, the second filter switch 38, and the third filter switch 39 can all be configured with the same structure. The first filter switch 37 can be larger than the second and third filter switches 38 and 39 to block the outlet 12 of the tower body 10. Understandably, rotating the rotating plate 380 so that the through hole 381 on the rotating plate 380 communicates with the filter hole of the sealing plate opens the first filter switch 37. Continuing to rotate the rotating plate 380 removes the communication between the through hole 381 and the filter hole of the sealing plate, closes the first filter switch 37. The first filter switch 37, the second filter switch 38, and the third filter switch 39 can be switched in the same manner.

[0063] During the adsorption process, the resin tower 100 opens the first filter screen switch 37 and the second filter screen switch 38, and closes the third filter screen switch 39.

[0064] Specifically, in one embodiment, the second filter switch 38 is opened, and the waste acid enters the tower body 10. The resin in the tower body 10 adsorbs the iron ions in the waste acid. After the adsorption is completed, the first filter switch 37 is opened, and the acid water is discharged from the outlet 12.

[0065] During the desorption process, the resin tower 100 opens the third filter screen switch 39, the outlet valve 50 of the first outlet pipe 35, the inlet valve 40 of the third inlet pipe 34, the booster pump 310, and the inlet valve 40 of the second inlet pipe 33, and closes the first filter screen switch 37, the second filter screen switch 38, the inlet valve 40 of the first inlet pipe 32, and the outlet valve 50 of the first inlet pipe 32.

[0066] Specifically, in one embodiment, the inlet valve 40 of the third inlet pipe 34 inputs pure water into the water storage tank 31, and then the pure water is pumped into the tower body 10 by the pressure pump 310 to clean and desorb the resin in the tower body 10. The cleaning water after cleaning contains a large amount of iron ions, so it can be discharged through the first outlet pipe 35.

[0067] During the water washing process of resin tower 100, the third filter screen switch 39, the inlet valve 40 of the first inlet pipe 32, the inlet valve 40 of the third inlet pipe 34, the pressurization pump 310, and the inlet valve 40 of the second inlet pipe 33 are opened, while the first filter screen switch 37, the second filter screen switch 38, the outlet valve 50 of the first outlet pipe 35, and the outlet valve 50 of the second outlet pipe 36 are closed.

[0068] Specifically, in one embodiment, pure water is continuously input into the water storage tank 31, and then the pure water is pumped into the tower body 10 by the pressurization pump 310 to clean the resin of the tower body 10 again. The cleaning water after cleaning contains less impurities. The outlet valve 50 of the first outlet pipe 35 is closed, and the inlet valve 40 of the inlet pipe 32 is opened, so that the cleaning water with less iron ion content can enter the water storage tank 31 from the first inlet pipe 32.

[0069] Understandably, if the cleaning water meets the resin protection liquid standard, the outlet valve 50 of the second outlet pipe 36 is closed, allowing the cleaning water to be stored in the storage tank 31, or it can be stored inside the tower body 10. If the cleaning water stored inside the tower body 10 meets the resin protection liquid standard, it will not react with the resin for a long time, thus protecting the resin, and can be used for the next round of desorption cleaning of the tower body 10.

[0070] If the cleaning water contains a high amount of impurities or does not meet the standards for resin protective solution, open the outlet valve 50 of the second outlet pipe 36. The cleaning water with a high impurity content can then be used to treat other wastewater, achieving efficient utilization of the cleaning water.

[0071] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A resin tower, characterized in that, The system includes a tower body, within which multiple baffles are installed. These baffles are disposed on the inner wall surface of the tower body and are spaced apart from and staggered. Each baffle includes a fixing plate and a barrier plate. The fixing plate is installed on the inner wall surface of the tower body and extends toward the central axis of the tower body. The barrier plate is connected to the fixing plate and extends along the height direction of the tower body.

2. The resin tower as described in claim 1, characterized in that, The baffle includes a plurality of first baffles and a plurality of second baffles. The first baffles and the second baffles are both disposed on the inner wall surface of the tower body. The first baffles and the second baffles are disposed opposite to each other and are spaced apart.

3. The resin tower as described in claim 2, characterized in that, The baffle plate of the first baffle is located above the fixing plate of the second baffle; there is a flow channel between the first baffle and the second baffle, and the flow channel is S-shaped.

4. The resin tower according to any one of claims 1 to 3, characterized in that, The top of the tower body is equipped with a wastewater inlet pipe, and the bottom of the tower body is provided with an outlet. The resin tower also includes a reflux device, which is located on one side of the tower body and is connected to the tower body.

5. The resin tower as described in claim 4, characterized in that, The reflux device includes a water storage tank and a first inlet pipe. The water storage tank is located on one side of the tower body, and the first inlet pipe is located at the top of the tower body and is opposite to the wastewater inlet pipe. The first inlet pipe connects the water storage tank and the tower body.

6. The resin tower as described in claim 5, characterized in that, The reflux device also includes a second water inlet pipe and a booster pump. The second water inlet pipe is located at the bottom of the tower body and is connected to the water storage tank. The booster pump is located in the second water inlet pipe.

7. The resin tower as described in claim 6, characterized in that, The reflux device also includes a third water inlet pipe, which is connected to the water storage tank; The first water inlet pipe, the second water inlet pipe, and the third water inlet pipe are all equipped with water inlet valves.

8. The resin tower as described in claim 6, characterized in that, The reflux device further includes a first water outlet pipe and a second water outlet pipe, wherein the first water outlet pipe is connected to the first water inlet pipe and the water storage tank; and the second water outlet pipe is connected to the second water inlet pipe and the water storage tank. Both the first and second water outlet pipes are equipped with water outlet valves.

9. The resin tower as described in claim 5, characterized in that, The outlet is equipped with a first filter screen switch that can be rotated and adjusted; the wastewater inlet pipe is equipped with a second filter screen switch; and the first inlet pipe is equipped with a third filter screen switch.

10. The resin tower as described in claim 9, characterized in that, The first filter switch, the second filter switch, and the third filter switch all include a sealing plate and a rotating plate. The sealing plate is provided with filter holes, and the rotating plate is rotatably disposed relative to the sealing plate. The rotating plate is provided with through holes corresponding to the filter holes.

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