A kind of desalination water system ion exchange resin backwash, packing device

Abstract

The utility model discloses a kind of desalted water system ion exchange resin backwash, filling device, including ion exchange device and backwash, filling tower, the resin import is set in the top of backwash, filling tower, and the resin export is set in the bottom;The resin export, inlet of the cation resin bed, anion resin bed of ion exchange device is respectively connected with the resin import, outlet of the backwash, filling tower by pipeline;The backwash water outlet, compressed air second inlet, raw water import are set in the top of the side of backwash, filling tower;Backwash water import, compressed air first inlet, blowdown water outlet are set in the bottom of side;Overflow port is set in the top of side.The device can reduce the manpower in the process of resin backwash, filling, save labor, improve work efficiency, prevent waste caused by resin wall hanging, and pollution of resin in the operation process.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology and relates to an ion exchange treatment device, particularly a device for external backwashing, filling and cleaning of ion exchange resin in a desalination system. Background Technology

[0002] Desalinated water in public utilities refers to water obtained from industrial production after removing dissolved salts, suspended solids, and other impurities through water treatment processes. It is primarily used for boiler feedwater and process water. Ion exchange is a commonly used method in desalination, employing ion exchange resins as the core technology. Water purification is achieved through the reversible exchange of ions between the resin's functional groups and the water. Cation exchange resins remove cations through sodium / hydrogen ion exchange, while anion exchange resins remove anions through hydroxyl ion exchange. Combining both forms a desalination system. The process includes stages such as washing, exchange, backwashing, and regeneration, with the resin being reused through acid or alkali regeneration.

[0003] Traditional ion exchange processes suffer from severe reliance on manual labor in resin loading and cleaning operations, requiring more than ten people to work simultaneously for each operation. This process is prone to problems such as resin loading errors and resin contamination. The main issues include the following: 1) The resin is prone to blockage during the resin transport process from the ion exchange unit to the backwashing unit. Once a blockage occurs, the flange must be disassembled and the blockage cleared, which is time-consuming, labor-intensive, and results in resin waste. 2) After the resin is cleaned and sent back to the ion exchange unit from the backwashing unit, a large amount of inert resin will be attached to the inner wall of the backwashing unit and cannot be sent back to the ion exchange unit. 3) When replacing the resin in the ion exchange device, after all the resin in the exchange device has been drained, some resin will still remain in the exchange device, which requires manual cleaning. 4) The resin filling process requires the disassembly and assembly of the ion exchange device, and a large amount of manual labor is needed to pour the resin into the ion exchange device bag by bag, which is time-consuming and labor-intensive. Errors are easy to occur during the filling process, and impurities may be mixed in. Summary of the Invention

[0004] The purpose of this invention is to provide a backwashing and filling device for ion exchange resin in a desalination system. This device addresses the shortcomings in the backwashing and filling process of ion exchange resin, reduces manpower during backwashing, filling, and cleaning, saves labor, reduces resin waste, and improves work efficiency.

[0005] This utility model provides a demineralized water system ion exchange resin backwashing and filling device, including an ion exchange device, characterized in that it further includes a backwashing and filling tower, wherein the backwashing and filling tower is provided with a resin inlet at the top and a resin outlet at the bottom; the resin inlets and outlets of the cation exchange resin bed and anion exchange resin bed of the ion exchange device are respectively connected to the resin inlet and outlet of the backwashing and filling tower via pipelines; the backwashing and filling tower is provided with a backwash water outlet, a second compressed air inlet, and a raw water inlet at the top side; a backwash water inlet, a first compressed air inlet, and a wastewater outlet at the bottom side; and an overflow port at the top side.

[0006] A first filter is installed at the front end of the pipeline connecting the backwash water inlet, the wastewater outlet, the first compressed air inlet, and the backwash and filling tower.

[0007] A second filter is installed at the front end of the pipeline connecting the raw water inlet, the second compressed air inlet, the backwash water outlet, and the backwash and filling tower.

[0008] The wastewater outlet is connected to the wastewater discharge tank; the backwash water outlet is connected to the wastewater discharge tank.

[0009] The overflow outlet is connected to the sewage tank and is mainly used to discharge large suspended solids that occur during the backwashing process.

[0010] The bottom and top of the backwashing and filling tower are conical.

[0011] The backwashing and filling tower is equipped with a Venturi ejector on its side. When the resin to be backwashed does not come from the ion exchange device, the resin can be drawn into the backwashing and filling tower through the Venturi ejector.

[0012] Another function of the Venturi ejector is that, after the resin in the ion exchange device has been discharged, the residual resin can be drawn into the backwash and filling tower through the Venturi ejector.

[0013] Beneficial effects: The desalination system ion exchange resin backwashing and filling device of this utility model can reduce labor costs during resin backwashing, filling and cleaning, save labor and improve work efficiency; prevent waste caused by resin adhering to the wall and avoid resin contamination during operation. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the structure of the ion exchange resin backwashing and filling device of the desalination system of this utility model; Among them, 1. Ion exchange device, 2. Venturi ejector, 3. Backwash and filling tower, 4. First filter, 5. Second filter, 6. Resin inlet valve, 7. Resin outlet valve, 8. Backwash water inlet valve, 9. Compressed air first inlet valve, 10. Raw water inlet valve, 11. Compressed air second inlet valve, 12. Backwash water outlet valve, 13. Wastewater outlet valve, 14. Resin suction valve, 15. Overflow valve. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below through specific embodiments. However, it should be noted that the following embodiments are only used to describe the content of the invention and do not constitute a limitation on the protection scope of this utility model.

[0016] See Figure 1 This utility model discloses an external backwashing and filling device for ion exchange resin in a desalination system, comprising an ion exchange device 1 and a backwashing and filling tower 3. The backwashing and filling tower 3 has a resin inlet at the top and a resin outlet at the bottom, with a resin inlet valve 6 and a resin outlet valve 7 respectively. A backwash water inlet and a first compressed air inlet are located on the side bottom. A backwash water inlet valve 8 and a first compressed air inlet valve 9 are installed on the pipeline connected to the backwashing and filling tower 3. A first filter 4 is located at the front end. The side bottom also includes a wastewater outlet with a wastewater outlet valve 13, and the side top has a backwash water outlet... The system includes a raw water inlet and a second compressed air inlet, and a backwash water outlet valve 12, a raw water inlet valve 10, and a second compressed air inlet valve 11 are installed on the pipeline connected to the backwash and filling tower 3. A second filter 5 is installed at the front end of the pipeline. An overflow port and an overflow valve 15 are installed on the top side. Optionally, the anion bed and cation bed resin outlets and inlets of the ion exchange device 1 share a resin delivery pipeline connected to the backwash and filling tower 3. A sight glass (not shown in the figure) is installed on the backwash and filling tower 3. A Venturi ejector 2 is installed on the side of the backwash and filling tower 3, which is connected to the backwash and filling tower 3 through a resin suction valve 14.

[0017] Optionally, the ion exchange resin backwashing and filling device of the demineralized water system can be configured using one or more of the following methods: The resin inlet is connected to the resin outlet and inlet of the ion exchange device 1 via a resin delivery pipeline, and a resin inlet valve 6 is installed on the pipeline. The resin outlet is connected to the resin inlet and outlet of the ion exchange device 1 via a resin delivery pipeline, and a resin outlet valve 7 is installed on the pipeline. The backwash water inlet, sewage outlet, and first compressed air inlet are connected to the backwash and filling tower 3 through the backwash pipe, sewage pipe, and first compressed air pipe. After the pipes are connected, they are connected to the backwash and filling tower 3 from the side bottom. A first filter 4 is installed at the outlet of the connecting pipe. The raw water inlet, the second compressed air inlet, and the backwash water outlet are connected to the backwash and filling tower 3 through the raw water pipeline, the second compressed air pipeline, and the backwash water outlet pipeline. After the pipelines are connected, they are connected to the backwash and filling tower 3 from the side and top. A second filter 5 is installed at the outlet of the connecting pipeline. The wastewater outlet is connected to the wastewater tank via wastewater outlet valve 13; the backwash water outlet is connected to the wastewater tank via backwash water outlet valve 12. The overflow port is connected to the sewage tank through the overflow valve 15; it is mainly used to discharge large suspended solids that appear during the backwashing process through the overflow port. The bottom and top of the backwashing and filling tower 3 are conical. Compressed air is introduced into the second compressed air inlet located on the top side of the backwashing and filling tower 3 to backfill the resin into the ion exchange device 1; Water is introduced through the raw water inlet located on the top side of the backwash and filling tower 3 to flush the resin adhering to the wall of the backwash and filling tower 1, or to backfill the resin into the ion exchange device 1. The first and second filters 4 and 5 installed in the backwashing and filling tower 3 are used to prevent resin loss; Water is introduced through the backwash water inlet located at the bottom of the side of the backwashing and filling tower 3 for backwashing the resin. Compressed air is introduced into the first compressed air inlet located at the bottom side of the backwashing and filling tower 3 for air washing of the resin. The backwashing and filling tower 3 is provided with a resin inlet at the top for receiving resin into the backwashing and filling tower 3, or for discharging inert resin into the ion exchange device 1. The backwashing and filling tower 3 is provided with a resin outlet at the bottom for sending resin to the ion exchange device 1; The backwashing and filling tower 3 is equipped with a Venturi ejector 2 on its side. When the resin to be backwashed does not come from the ion exchange device 1, the resin is sucked into the backwashing and filling tower 3 through the Venturi ejector 2. Alternatively, after the resin in the ion exchange device 1 has been discharged, the residual resin can be sucked into the backwashing and filling tower 3 through the Venturi ejector 2. (The residual resin at the bottom of the ion exchange device 1 can be sucked away by connecting a hose to the resin suction port of the Venturi ejector 2.)

[0018] The method for external backwashing and filling of ion exchange resin using the above-mentioned ion exchange resin external backwashing and filling device includes the following steps: I. Resin external backwashing procedure: (1) Resin is fed into the backwash and filling tower: The resin is fed from the ion exchange device 1 into the backwash and filling tower 3 through the resin inlet valve 6.

[0019] (2) Air scrubbing: Compressed air enters the backwash and filling tower 3 through the first compressed air inlet valve 9 and is discharged through the backwash water outlet valve 12. During this process, the air agitates the resin in the backwash and filling tower 3, causing them to rub against each other and peel off the impurities on the surface of the resin.

[0020] (3) Water backwashing: Backwash water enters the backwashing and filling tower 3 through the backwash water inlet valve 8 and is drained through the backwash water outlet valve 12. During this process, the suspended impurities that are peeled off and detached from the resin are carried out of the backwashing and filling tower 3 by the water flow. When there are large suspended solids in the backwashing and filling tower 3 that cannot be discharged, the overflow valve 15 can be used to overflow and drain the water. (4) Determine if backwashing is complete: Observe whether the backwash water is clear. If it is clear, the backwashing is complete. If it is not clear, continue backwashing until it is clear. (5) Backfilling resin: After backwashing is completed, open the resin outlet valve 7 and the backwash water enters the backwash and filling tower 3 through the backwash water inlet valve 8. The resin in the backwash and filling tower 3 is backfilled into the ion exchange device 1 through the water flow.

[0021] II. New Resin Filling Procedure: (1) First step: Open the resin suction valve 14, turn on the power water to pass through the Venturi ejector 2, and suck the new resin into the backwash and filling tower 3.

[0022] (2) Second step: After the new resin is sucked in, open the resin outlet valve 7 and the backwash water enters the backwash and filling tower 3 through the backwash water inlet valve 8. The resin in the backwash and filling tower 3 is then backfilled into the ion exchange device 1 through the water flow.

[0023] III. Inert resin backfilling: Because inert resin is less dense than water, it is suspended in water and cannot be completely backfilled into the ion exchange unit 1 during the resin backfilling process. It is prone to adhering to the walls of the backwash and filling tower 3. The inert resin backfilling can be completed by opening the resin inlet valve 6, allowing backwash water to enter the backwash and filling tower 3 through the backwash water inlet valve 8. By filling the backwash and filling tower 3 with water, the floating inert resin is carried into the ion exchange unit 1 with the water, thus completing the inert resin backfilling.

Claims

1. A backwashing and filling device for ion exchange resin in a desalination system, comprising an ion exchange unit, characterized in that, It also includes a backwashing and filling tower, with a resin inlet at the top and a resin outlet at the bottom; the resin inlets and outlets of the cation exchange resin bed and anion exchange resin bed of the ion exchange device are connected to the resin inlet and outlet of the backwashing and filling tower respectively via pipelines; the backwashing and filling tower has a backwash water outlet, a second compressed air inlet, and a raw water inlet at the top side; a backwash water inlet, a first compressed air inlet, and a wastewater outlet at the bottom side; and an overflow port at the top side.

2. The desalination system ion exchange resin backwashing and filling device according to claim 1, characterized in that, The backwashing and filling tower is equipped with a Venturi ejector on its side.

3. The desalination system ion exchange resin backwashing and filling device according to claim 1 or 2, characterized in that, A first filter is installed at the front end of the pipeline connecting the backwash water inlet, the wastewater outlet, the first compressed air inlet, and the backwash and filling tower.

4. The desalination system ion exchange resin backwashing and filling device according to claim 1 or 2, characterized in that, A second filter is installed at the front end of the pipeline connecting the raw water inlet, the second compressed air inlet, the backwash water outlet, and the backwash and filling tower.

5. The desalination system ion exchange resin backwashing and filling device according to claim 1 or 2, characterized in that, The wastewater outlet is connected to the wastewater discharge tank; the backwash water outlet is connected to the wastewater discharge tank.

6. The desalination system ion exchange resin backwashing and filling device according to claim 1 or 2, characterized in that, The overflow outlet is connected to the sewage tank.

7. The desalination system ion exchange resin backwashing and filling device according to claim 1 or 2, characterized in that, The bottom and top of the backwashing and filling tower are conical.

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