Continuous ion exchange equipment

Abstract

The utility model provides continuous ion exchange equipment which comprises a water inlet pump, water distributors, an adsorption tank, screen pipes, a closed funnel, a diaphragm valve, an air lifter, a regeneration tank, an inclined tee joint, an exhaust pipe and a guide plate, the water inlet pump is connected with the adsorption tank through a water pipe, and the water distributors and the screen pipes are arranged in the adsorption tank and the regeneration tank. The closed funnels are arranged at the top ends of the adsorption tank and the regeneration tank respectively and connected with the air lifter through the inclined tee joint, the diaphragm valves are arranged at the bottom ends of the adsorption tank and the regeneration tank respectively and connected with the air lifter through the resin pipes, the exhaust pipe is arranged on the inclined tee joint, and the guide plate is arranged in the regeneration tank. Through countercurrent operation of the adsorption tank and countercurrent operation of the regeneration tank, continuous adsorption and regeneration of the resin are realized, the utilization rate of the resin is greatly improved, the use amount of the resin is reduced, all self-control valves are omitted, and the construction cost can be greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the fields of pharmaceutical chemical and water treatment technology, and specifically relates to a continuous ion exchange device. Background Technology

[0002] Ion exchange resins are widely used in pharmaceuticals, chemicals, water treatment, and other industries, and are currently mostly used in fixed-bed configurations. During a working cycle in a fixed bed, the proportion of saturated resin gradually increases as the exchange belt (i.e., the protective layer) moves. When the exchange belt (i.e., the protective layer) reaches the end of the adsorption tank, adsorption must be stopped and regeneration started to ensure adsorption efficiency, resulting in some resin not being fully utilized. Because saturated resin cannot be regenerated in time during the working cycle, it occupies most of the volume, and the resin in the exchange belt (i.e., the protective layer) is not fully utilized, leading to a large adsorption tank volume, a large amount of resin required, and the inability to operate continuously. The regeneration process is cumbersome, requiring numerous automated valves, resulting in high equipment investment. Utility Model Content

[0003] The purpose of this utility model is to solve the problems that the saturated resin cannot be regenerated in time during the working cycle, occupying most of the volume, and the resin in the exchange belt is not fully utilized, resulting in a large volume of adsorption tank, a large amount of resin to be filled, and continuous operation, complicated regeneration steps, and the need for a large number of automatic control valves, leading to high equipment investment. The present invention provides a continuous ion exchange device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a continuous ion exchange device, comprising: an inlet pump, a water distributor, an adsorption tank, a screen tube, a closed funnel, a diaphragm valve, an air lifter, a regeneration tank, an inclined tee, an exhaust pipe, and a guide plate;

[0005] The water inlet pump is connected to the adsorption tank via a water pipe. Both the adsorption tank and the regeneration tank are equipped with a water distributor and a screen. The closed funnel is located at the top of the adsorption tank and the regeneration tank respectively, and is connected to the air lifter via a tee. The diaphragm valve is located at the bottom of the adsorption tank and the regeneration tank respectively, and is connected to the air lifter via a resin pipe. The exhaust pipe is located on the tee. The guide plate is located inside the regeneration tank.

[0006] Furthermore, the screen tube in the adsorption tank is located above the water distributor, and one screen tube in the regeneration tank is located above the water distributor that carries hydrochloric acid, while the other two screen tubes are located between the water distributor that carries hydrochloric acid and the water distributor that carries liquid alkali.

[0007] Furthermore, filter caps are evenly distributed on the side of the water distributor.

[0008] Furthermore, the filter cap is a hemispherical water distribution filter cap.

[0009] Furthermore, an annular gap is provided between the inner wall of the adsorption tank and the regeneration tank and the water distributor inside them, so that the resin can flow into the bottom of the adsorption tank and the regeneration tank.

[0010] Furthermore, a sight glass is provided on the outside of the adsorption tank and the regeneration tank, and is located at the height of the annular gap.

[0011] Furthermore, a maintenance valve is provided on the resin tube, and a quick connector is installed on the maintenance valve.

[0012] Furthermore, a long-radius elbow is provided at the bend of the resin tube, and the resin tube is connected to the vertical pipe at one end of the air lifter through the long-radius elbow. The vertical pipe at the other end of the air lifter is higher than the adsorption tank and the regeneration tank, and is connected to the oblique tee.

[0013] Furthermore, the guide plate is distributed circumferentially and is obliquely downward below the water distributor for hydrochloric acid and the water distributor for liquid alkali.

[0014] Furthermore, the water distributor and screen inside the adsorption tank and regeneration tank are connected to water pipes for the input of hydrochloric acid, liquid alkali, pure water and water, as well as the discharge of acid regeneration solution, alkali regeneration solution and water. Flow meters are installed on the water pipes for inputting hydrochloric acid, liquid alkali and pure water and outputting alkali regeneration solution.

[0015] Beneficial Effects: This invention utilizes an air lift to deliver saturated resin from the bottom outlet of the adsorption tank to the top sealed funnel of the regeneration tank. The resin flows downwards under gravity, contacting the upward-flowing hydrochloric acid, liquid alkali, and pure water in a counter-current axial direction, thus achieving regeneration. Simultaneously, the conical water distributor and guide plate cause repeated radial redistribution of the descending resin, effectively preventing resin short-circuiting. The regenerated resin, under the action of the air lift, enters the adsorption tank, flowing downwards under gravity and contacting the upward-flowing inlet water in a counter-current axial direction, ensuring a complete and thorough adsorption reaction. Simultaneously, the conical water distributor causes radial diffusion from the center outwards, preventing resin short-circuiting and maximizing the resin's adsorption capacity. Saturated resin then flows back into the regeneration tank under the action of the air lift. Through this process, continuous resin adsorption and regeneration can be achieved, significantly improving resin utilization, reducing resin consumption, eliminating all automatic control valves, and greatly reducing construction costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] In the diagram: 1. Inlet pump, 2. Water distributor, 3. Adsorption tank, 4. Screen tube, 5. Closed funnel, 6. Diaphragm valve, 7. Air lift, 8. Sight glass, 9. Regeneration tank, 10. Angled tee, 11. Exhaust pipe, 12. Guide plate, 13. Quick connector, 14. Long radius elbow. Detailed Implementation

[0018] The present invention will be further explained below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, this utility model provides a continuous ion exchange device, including: an inlet pump 1, a water distributor 2, an adsorption tank 3, a screen pipe 4, a closed funnel 5, a diaphragm valve 6, an air lift 7, a regeneration tank 9, an inclined tee 10, an exhaust pipe 11, and a guide plate 12.

[0020] The water inlet pump 1 is connected to the adsorption tank 3 through a water pipe. Both the adsorption tank 3 and the regeneration tank 9 are equipped with a water distributor 2 and a screen pipe 4. The closed funnel 5 is respectively located at the top of the adsorption tank 3 and the regeneration tank 9, and is connected to the air lifter 7 through the inclined tee 10. The diaphragm valve 6 is respectively located at the bottom of the adsorption tank 3 and the regeneration tank 9, and is connected to the air lifter 7 through a resin pipe. The exhaust pipe 11 is located on the inclined tee 10, and the guide plate 12 is located inside the regeneration tank 9.

[0021] An annular gap is provided between the inner wall of the adsorption tank 3 and the regeneration tank 9 and the water distributor 2 inside them. Filter caps are evenly arranged on the side of the water distributor 2. The screen tube 4 inside the adsorption tank 3 is located above the water distributor 2. One screen tube 4 inside the regeneration tank 9 is located above the water distributor 2 that carries hydrochloric acid. The other two screen tubes 4 are located between the water distributor 2 that carries hydrochloric acid and the water distributor 2 that carries liquid alkali. A sight glass is provided on the outside of the adsorption tank 3 and the regeneration tank 9 and is located at the height of the annular gap. A maintenance valve is provided on the resin tube at the bottom of the adsorption tank 3 and the regeneration tank 9. A quick connector is installed on the maintenance valve. A long radius elbow 14 is provided at the bend of the resin tube. The resin tube is connected to the vertical pipe at one end of the air lift 7 through the long radius elbow 14. The vertical pipe at the other end of the air lift 7 is higher than the adsorption tank 3 and the regeneration tank 9 and is connected to the oblique tee 10.

[0022] Inside the regeneration tank 9, the guide plates 12 are distributed circumferentially and are obliquely downward below the water distributor 2 for hydrochloric acid and the water distributor 2 for liquid alkali. The water distributor 2 and the screen tube 4 inside the adsorption tank 3 and the regeneration tank 9 are also connected to water pipes for the input of hydrochloric acid, liquid alkali, pure water and water, as well as the discharge of acid regeneration solution, alkali regeneration solution and water. Flow meters are installed on the water pipes for inputting hydrochloric acid, liquid alkali, pure water and outputting alkali regeneration solution.

[0023] In this embodiment, the water distributor 2 inside the adsorption tank 3 and the regeneration tank 9 is a fully enclosed hollow container made of fiberglass, stainless steel or plastic sheet, and the water distributor 2 is conical. The filter cap on the water distributor 2 is a hemispherical water distribution filter cap. The bottom of the adsorption tank 3 and the regeneration tank 9 are both conical. The long radius elbow 14 is a 45° long radius elbow. The exhaust pipe 11 of the oblique tee 10 is used to release compressed air. The screen pipe 4 is a screen pipe for uniform water distribution and collection. Its material is stainless steel. The flow meter is used to adjust the flow rate to control the flow direction of the regeneration liquid in the regeneration tank. The regeneration liquid includes, but is not limited to, hydrochloric acid, liquid alkali and pure water. When the resin in the adsorption tank or the regeneration tank fails, it will be replaced with new resin. When replacing the resin, the failed resin is discharged through the inspection valve and the bottom quick connector, and then the new resin is added through the closed funnel at the top.

[0024] The working process of this utility model is as follows:

[0025] First, the saturated resin is transported from the bottom outlet of the adsorption tank to the center inlet of the top of the regeneration tank using an air lifter. The resin flows downward under gravity and comes into countercurrent contact with the upward-flowing regeneration liquid to achieve the regeneration process. At the same time, the descending resin is redistributed radially multiple times through a conical water distributor and a baffle plate. The regenerated resin is collected in the cone at the bottom of the regeneration tank, discharged through a diaphragm valve, and then sent to the adsorption tank via the air lifter.

[0026] The regenerated resin is added from the closed funnel and flows downward under gravity, coming into contact with the upward-flowing inlet water in a counter-current axial direction to carry out the adsorption reaction. The resin is collected in the cone at the bottom of the adsorption tank through the annular gap between the conical water distributor at the bottom of the adsorption tank and the adsorption tank. After being discharged through the diaphragm valve, it is sent to the regeneration tank through the air lifter.

[0027] The above process includes countercurrent operation of the adsorption tank and countercurrent operation of the regeneration tank.

[0028] The countercurrent operation of the adsorption tank includes the resin flow pattern within the adsorption tank, the influent flow pattern within the adsorption tank, and the transfer of saturated adsorption resin, as detailed below:

[0029] The resin flow pattern inside the adsorption tank: Regenerated fresh resin is added from the top center and flows downwards under gravity, contacting the upward-flowing inlet water in a counter-current axial direction. Simultaneously, it diffuses radially from the center outwards under the action of the conical water distributor, finally falling through the annular gap between the conical water distributor and the adsorption tank into the conical hopper at the bottom of the adsorption tank. During this process, the adsorption reaction is completed. Afterwards, it is discharged through the diaphragm valve at the bottom of the conical hopper and sent to the regeneration tank via an air lift. In this way, as the resin flows downwards under gravity, it not only contacts the upward-flowing inlet water in a counter-current axial direction, completing the adsorption reaction completely and fully, but also undergoes a radial diffusion process from the center outwards. This helps avoid resin short-circuiting and fully utilizes the resin's adsorption capacity.

[0030] The inlet water flow pattern in the adsorption tank: The inlet water enters the conical water distributor at the bottom of the adsorption tank through the booster pump. Under the action of the inlet water pressure, it flows out from the filter caps evenly distributed on the side of the conical water distributor, achieving uniform distribution across the entire cross-section. Then it flows upward and comes into countercurrent contact with the resin flowing downward under the action of gravity. After completing the adsorption reaction, it is evenly collected by the screen tube at the top of the adsorption tank and then flows out.

[0031] Transfer of saturated resin: The resin discharged from the conical hopper at the bottom of the adsorption tank is transferred to the vertical pipe through two 45° long-radius bends. The vertical pipe is equipped with an air lifter, which uses the introduced compressed air to lift the saturated resin to the inclined tee at the top of the regeneration tank. The compressed air is released through the exhaust pipe, and the saturated resin slides down to the resin inlet at the top of the regeneration tank under the action of gravity through the inclined tee.

[0032] The regeneration tank countercurrent operation includes the resin flow pattern within the regeneration tank, the regenerated liquid flow pattern within the regeneration tank, and the transfer of the regenerated resin, as detailed below:

[0033] Resin flow pattern in the regeneration tank: The saturated resin is delivered from the bottom outlet of the adsorption tank to the center inlet at the top of the regeneration tank using an air lifter. The resin flows downward under gravity and comes into counter-current contact with the upward-flowing regeneration liquid (hydrochloric acid, liquid alkali, and pure water in sequence) to achieve the regeneration process. At the same time, the descending resin is repeatedly redistributed radially by the action of the conical water distributor and the guide plate (i.e., the conical water distributor diffuses the resin from the center to the periphery, and the guide plate gathers the resin from the periphery to the center), which can effectively prevent resin short-circuiting. The regenerated resin is collected in the cone at the bottom of the regeneration tank, discharged through the diaphragm valve, and then sent to the adsorption tank by the air lifter.

[0034] The regeneration solution flow pattern within the regeneration tank: Hydrochloric acid, liquid alkali, and pure water enter the upper, middle, and lower conical water distributors respectively, following the regeneration sequence. This allows the descending resin flow to sequentially pass through acid regeneration, alkali conversion, and displacement cleaning, completing the entire regeneration process. Additionally, to isolate the acid and alkali and prevent direct contact, two layers of screens are added below the hydrochloric acid distributor. Pure water is injected into the upper screen, which is divided into upward and downward flows. The upward-flowing portion mixes with the hydrochloric acid and is then evenly collected and discharged through the top screen of the regeneration tank. The downward-flowing portion and the upward-flowing alkali regeneration waste liquid are collected evenly through the lower screen tube and then discharged, thereby achieving the purpose of isolating acid and alkali. During operation, it is only necessary to adjust the regeneration liquid flow rate so that FI-01+FI-02+FI-04>FI-03>FI-01+FI-02. The acid regeneration waste liquid and the alkali regeneration waste liquid are collected and discharged through the stainless steel screen tubes in the upper and middle parts of the regeneration tank, respectively. FI-01, FI-02, FI-03 and FI-04 represent the flow rates of each flow meter.

[0035] Transfer of regenerated resin: The resin discharged from the conical hopper at the bottom of the regeneration tank is transferred to the vertical pipe through two 45° long-radius bends. The vertical pipe is equipped with an air lifter, which uses the introduced compressed air to lift the regenerated resin to the inclined tee at the top of the adsorption tank. The compressed air is released through the exhaust pipe. The regenerated resin slides down to the resin inlet at the top of the adsorption tank under the action of gravity through the inclined tee.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A continuous decoupling device, characterized in that, include: Water inlet pump (1), water distributor (2), adsorption tank (3), screen pipe (4), closed funnel (5), diaphragm valve (6), air lifter (7), regeneration tank (9), oblique tee (10), exhaust pipe (11), and guide plate (12); The water inlet pump (1) is connected to the adsorption tank (3) through a water pipe. The adsorption tank (3) and the regeneration tank (9) are both equipped with a water distributor (2) and a screen pipe (4). The closed funnel (5) is respectively located at the top of the adsorption tank (3) and the regeneration tank (9), and is connected to the air lifter (7) through a tee (10). The diaphragm valve (6) is respectively located at the bottom of the adsorption tank (3) and the regeneration tank (9), and is connected to the air lifter (7) through a resin pipe. The exhaust pipe (11) is located on the tee (10), and the guide plate (12) is located inside the regeneration tank (9).

2. The continuous switching equipment according to claim 1, characterized in that, The screen tube (4) inside the adsorption tank (3) is located above the water distributor (2). One screen tube (4) inside the regeneration tank (9) is located above the water distributor (2) into which hydrochloric acid is introduced, and the other two screen tubes (4) are located between the water distributor (2) into which hydrochloric acid is introduced and the water distributor (2) into which liquid alkali is introduced.

3. The continuous switching equipment according to claim 1, characterized in that, The water distributor (2) has filter caps evenly distributed on its side.

4. The continuous switching equipment according to claim 3, characterized in that, The filter cap is a hemispherical water distribution filter cap.

5. The continuous switching equipment according to claim 1, characterized in that, The inner walls of the adsorption tank (3) and the regeneration tank (9) are provided with annular gaps between them and the water distributor (2) inside, so that the resin can flow into the bottom of the adsorption tank (3) and the regeneration tank (9).

6. The continuous switching device according to claim 5, characterized in that, The adsorption tank (3) and the regeneration tank (9) are provided with viewing mirrors on their outer sides, and are located at the height of the annular gap.

7. The continuous switching equipment according to claim 1, characterized in that, The resin tube is equipped with a maintenance valve, and the maintenance valve is fitted with a quick connector (13).

8. The continuous switching device according to claim 1, characterized in that, The resin tube is provided with a long radius elbow (14) at the bend. The resin tube is connected to the vertical pipe at one end of the air lifter (7) through the long radius elbow (14). The vertical pipe at the other end of the air lifter (7) is higher than the adsorption tank (3) and the regeneration tank (9) and is connected to the oblique tee (10).

9. The continuous switching device according to claim 1, characterized in that, The guide plate (12) is distributed circumferentially and is set obliquely downward below the water distributor (2) that carries hydrochloric acid and the water distributor (2) that carries liquid alkali.

10. The continuous switching device according to claim 1, characterized in that, The water distributor (2) and screen (4) inside the adsorption tank (3) and regeneration tank (9) are connected to water pipes for inputting hydrochloric acid, liquid alkali, pure water and water, and for discharging acid regeneration liquid, alkali regeneration liquid and water. Flow meters are installed on the water pipes for inputting hydrochloric acid, liquid alkali, pure water and outputting alkali regeneration liquid.

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