An optimized bubbling device for regenerating chlor-alkali chelating resin towers

Abstract

This utility model relates to a regeneration optimization bubbling device for a chlor-alkali chelating resin tower, comprising: a tank body with a brine distributor installed at the top and a refined brine outlet pipe and a pure water backwash pipe connected to the bottom; an air inlet pipe connected to the bottom of the tank body; and a resin capture tank connected to the top of the tank body. When the resin tower enters the regeneration stage, air enters from the bottom of the resin tower to bubble and tumble the resin bed, making the resin more porous and improving its adsorption capacity. Simultaneously, it pushes broken resin particles to the top layer, facilitating subsequent pure water backwashing and making it easier to remove broken resin particles, reducing tower resistance, achieving a virtuous cycle, ensuring stable production, and featuring simple piping and easy, flexible operation.

Description

Technical Field

[0001] This utility model relates to the field of chlor-alkali ion membrane production, specifically to a chlor-alkali chelating resin tower regeneration and optimized bubbling device. Background Technology

[0002] Currently, in the operation of chlor-alkali ion-exchange membrane electrolysis chemical production, improving the quality of the brine entering the electrolyzer is of paramount importance. The chelating resin tower, as the last line of defense in the ion-exchange membrane electrolyzer, primarily aims to further purify the refined brine by adsorbing calcium and magnesium ions (≤20 ppb) from the brine using chelating resin. After a period of adsorption, calcium and magnesium gradually accumulate and may even become saturated. At this point, the resin is regenerated using hydrochloric acid and caustic soda. Finally, pure water is used for backflushing and replacement to wash out broken resin particles, allowing the resin tower to be repeatedly recycled to meet production needs.

[0003] In actual production, due to the long-term repeated regeneration and adsorption of resin, the self-generated stress leads to breakage. Using pure water for bottom backflushing is not very effective, especially when the resin is older, the breakage rate is higher, the resistance inside the tower increases, and in severe cases, it can lead to insufficient flow rate and excessive calcium and magnesium in the brine, making it impossible to meet production needs. Utility Model Content

[0004] Based on the above description, this utility model provides a regeneration optimization bubbling device for chlor-alkali chelating resin towers to solve the problems in related technologies where resin aging and breakage lead to increased resistance inside the tower, insufficient flow rate, and excessive calcium and magnesium in the brine, thus failing to meet production needs.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a chlor-alkali chelating resin tower regeneration optimization bubbling device, which includes: a tank body, with a brine distributor installed at the top inside, and a refined brine outlet pipe and a pure water backwash pipe connected to the bottom; an air inlet pipe connected to the bottom of the tank body; and a resin capture tank connected to the top of the tank body.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, a pure water backwash valve is installed on the pure water backwash pipe, and an air inlet regulating valve is installed on the air inlet pipe.

[0008] Furthermore, a check valve is installed on the air intake pipe, and the check valve is located between the air inlet regulating valve and the tank body.

[0009] Furthermore, a pressure gauge is installed on the air intake pipe, and the pressure gauge is located between the check valve and the tank body.

[0010] Furthermore, a pressure relief valve is installed on the air intake pipe, and the pressure relief valve is located between the pressure gauge and the tank.

[0011] Furthermore, an air root valve is installed on the air intake pipe, and the air root valve is located between the pressure relief valve and the tank body.

[0012] Furthermore, the air intake pipe is connected to the pure water backwash pipe.

[0013] Furthermore, a perforated plate is installed inside the tank, and a water cap is installed on the perforated plate.

[0014] Furthermore, both the tank body and the resin capture tank are equipped with sight glasses on their outer sides.

[0015] Furthermore, a polyester mesh is provided inside the resin trap. Compared with the prior art, the technical solution of this application has the following beneficial technical effects: When the resin tower enters the regeneration stage, air is used to enter from the bottom of the resin tower to bubble and tumble the resin bed, making the resin more fluffy and improving its adsorption capacity. At the same time, the broken small resin pieces are pushed to the top layer, which is convenient for subsequent pure water backwashing and makes it easier to carry away the broken resin pieces, reducing tower resistance, achieving a virtuous cycle, ensuring stable production, and the system has simple piping and is easy and flexible to operate. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the chlor-alkali chelating resin tower regeneration optimization bubbling device provided in this embodiment of the utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1. Tank body; 2. Brine distributor; 3. Pure water backwash pipe; 4. Fine brine outlet pipe; 5. Air inlet pipe; 6. Air inlet regulating valve; 7. Resin capture tank; 8. Check valve; 9. Pressure gauge; 10. Pressure relief valve; 11. Air root valve; 12. Perforated plate; 13. Water cap; 14. Sight glass; 15. Pure water backwash valve; 16. Outlet control valve; 17. Inlet control valve. Detailed Implementation

[0018] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0019] This utility model provides an optimized bubbling device for the regeneration of chlor-alkali chelating resin towers, which can solve the problems in related technologies where resin aging leads to increased resistance inside the tower, insufficient flow rate, and excessive calcium and magnesium in the brine, thus failing to meet production needs.

[0020] See Figure 1 As shown in the illustration, a regeneration optimization bubbling device for a chlor-alkali chelating resin tower according to an embodiment of this utility model includes: a tank 1, with a brine distributor 2 installed at the top inside to evenly spray brine and prevent resin escape during backwashing; a fine brine outlet pipe 4 and a pure water backwash pipe 3 connected to the bottom; an air inlet pipe 5 connected to the bottom of the tank 1; and a resin capture tank 7 connected to the top of the tank 1. Brine enters from the top, is adsorbed by the resin bed, and exits from the bottom. Pure water backwashing involves bottom entry and top exit, passing through the resin capture tank before being discharged. Air is bubbled at the bottom of the resin bed to make it more porous and increase its adsorption capacity. Simultaneously, broken resin is promptly bubbled to the top and carried out quickly. By reasonably adjusting and optimizing the local process, the resistance inside the tower is reduced, the adsorption effect is improved, and safe and stable production is ensured.

[0021] See Figure 1 As shown, in some embodiments, a pure water backwash valve 15 is installed on the pure water backwash pipe 3, and an air inlet regulating valve 6 is installed on the air inlet pipe 5. They are used in conjunction with the pressure gauge 9. The air inlet regulating valve 6 is opened slowly to observe the bubbling situation in the tower. The bubbling time is generally controlled at 10 minutes, which not only makes the resin bed more fluffy and the adsorption effect better, but also allows the broken resin to be bubbled to the top layer, making it convenient for pure water to wash out and take away.

[0022] See Figure 1 As shown, in some embodiments, a check valve 8 is installed on the air inlet pipe 5. The check valve 8 is located between the air inlet regulating valve 6 and the tank body 1 to prevent brine (pure water) from backflowing into the air system.

[0023] See Figure 1 As shown, in some embodiments, a pressure gauge 9 is installed on the air inlet pipe 5, the pressure gauge 9 being located between the check valve 8 and the tank body 1, for controlling the pressure to be less than 0.25 MPa.

[0024] See Figure 1 As shown, in some embodiments, a pressure relief valve 10 is installed on the air inlet pipe 5. The pressure relief valve 10 is located between the pressure gauge 9 and the tank body 1. The pressure relief valve 10 is opened after all bubbling is completed, which can effectively ensure that air and brine do not cross-contaminate, thus playing a protective role.

[0025] See Figure 1As shown, in some embodiments, an air root valve 11 is installed on the air inlet pipe 5. The air root valve 11 is located between the pressure relief valve 10 and the tank body 1. After the air root valve 11 is opened, the air inlet regulating valve 6 is slowly opened to prevent brine (pure water) from backflowing into the air system.

[0026] See Figure 1 As shown, in some embodiments, the air intake pipe 5 is connected to the pure water backwash pipe 3.

[0027] See Figure 1 As shown, in some embodiments, a perforated plate 12 is installed inside the tank 1 to provide support, and a water cap 13 is installed on the perforated plate 12 to prevent resin loss and filter out brine.

[0028] Both the tank body 1 and the resin capture tank 7 are equipped with sight glasses 14 on their outer sides for observing the height of the resin bed and the effect of pure water on the backwashing of the resin.

[0029] See Figure 1 As shown, in some embodiments, the resin capturing tank 7 is provided with polyester mesh to prevent good resin from being carried away during pure water backwashing.

[0030] For pipelines and valves, it is not recommended to use materials such as plastic, as they need to withstand a certain pressure. Bubbling time should not be too long (intense bubbling will increase friction between resin particles; the goal is to achieve a fluffy effect without causing resin breakage). The pressure relief valve should be open during non-regeneration periods and should be checked regularly for air or brine leaks.

[0031] The specific steps for using the chelated resin tower regeneration optimized bubbling device provided in this embodiment are as follows: a. When the resin tower is in the regeneration stage, close the pressure relief valve 10.

[0032] b. Open the air root valve 11.

[0033] c. Slowly open the air inlet regulating valve 6, and carefully observe the pressure gauge 9 (less than 0.25 MPa), while also observing the bubbling of the resin inside the tower.

[0034] d. Stop bubbling after the set time, and close the air root valve 11 and the air inlet regulating valve 6.

[0035] e. Open the pressure relief valve 10. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0036] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0037] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0038] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A regeneration and optimized bubbling device for a chlor-alkali chelating resin tower, characterized in that, It includes: The tank (1) has a brine distributor (2) installed on the upper part of the interior and a fine brine outlet pipe (4) and a pure water backwash pipe (3) connected to the bottom. An air inlet pipe (5) is connected to the bottom of the tank (1); A resin trap (7) is attached to the top of the tank body (1).

2. The optimized bubbling device for regenerating chlor-alkali chelating resin tower according to claim 1, characterized in that: A pure water backwash valve (15) is installed on the pure water backwash pipe (3), and an air inlet regulating valve (6) is installed on the air inlet pipe (5).

3. The chlor-alkali chelating resin tower regeneration and optimized bubbling device according to claim 2, characterized in that: A check valve (8) is installed on the air inlet pipe (5), and the check valve (8) is located between the air inlet regulating valve (6) and the tank (1).

4. The chlor-alkali chelating resin tower regeneration and optimized bubbling device according to claim 3, characterized in that: A pressure gauge (9) is installed on the air inlet pipe (5), and the pressure gauge (9) is located between the check valve (8) and the tank (1).

5. The chlor-alkali chelating resin tower regeneration and optimized bubbling device according to claim 4, characterized in that: A pressure relief valve (10) is installed on the air inlet pipe (5), and the pressure relief valve (10) is located between the pressure gauge (9) and the tank (1).

6. The chlor-alkali chelating resin tower regeneration and optimized bubbling device according to claim 5, characterized in that: An air root valve (11) is installed on the air intake pipe (5), and the air root valve (11) is located between the pressure relief valve (10) and the tank (1).

7. The optimized bubbling device for regenerating chlor-alkali chelating resin tower according to claim 1, characterized in that: The air inlet pipe (5) is connected to the pure water backwash pipe (3).

8. The optimized bubbling device for regenerating chlor-alkali chelating resin tower according to claim 1, characterized in that: A perforated plate (12) is installed inside the tank (1), and a water cap (13) is installed on the perforated plate (12).

9. The chlor-alkali chelating resin tower regeneration and optimized bubbling device according to claim 1, characterized in that: Both the tank body (1) and the resin capture tank (7) are equipped with sight glasses (14) on their outer sides.

10. The chlor-alkali chelating resin tower regeneration and optimized bubbling device according to claim 1, characterized in that: The resin trap (7) is equipped with a polyester mesh.

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