A cation exchanger facilitating backwashing and a method of using the same

Abstract

The application relates to the technical field of cation exchangers, in particular to a cation exchanger convenient for backwashing and a use method thereof, which comprises a filter layer, a top cover and a tank body, the tank body top is detachably connected with the top cover through bolts, the filter layer is arranged in the tank body, and resin is arranged in the filter layer; a fourth channel communicated with the tank body side wall is arranged below the filter layer; a third channel is arranged at the tank body bottom, a tower type orifice plate cover is arranged at the tank body top, the tower type orifice plate cover is fixed with the top cover inner cavity top, and a first channel and a second channel are communicated with the tower type orifice plate cover after penetrating through the top cover. The tower type orifice plate cover is used to guide the input water to be purified, which can prevent the input water pressure from being too large to damage the resin and can make the water to be purified contact different resins more uniformly.

Description

Technical Field

[0001] This invention relates to the technical field of cation exchangers, specifically a cation exchanger that is easy to backwash and its usage method. Background Technology

[0002] A cation exchanger, also known as a cation bed, removes cations such as sodium, magnesium, and calcium ions from water and is an important component of a water purification system. When selecting a cation exchanger, factors such as water quality requirements, treatment capacity, operating costs, and maintenance requirements need to be considered to determine the most suitable type and configuration.

[0003] The Chinese utility model patent with authorization announcement number CN220861480U, published on April 30, 2024, discloses a novel ultra-clean, high-purity membrane cation exchanger. It is equipped with a pure PFA membrane and a polyimide membrane. The inner wall of the tank is lined with a pure PFA membrane, and the outer wall is covered with a layer of corrosion-resistant polyimide membrane. This makes the entire exchanger resistant to strong acid and strong alkali corrosion during operation, and has extremely high chemical stability and service life. However, when water to be purified is introduced, the impact of the water on the resin may cause damage to the resin. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a cation exchanger and its usage method that facilitates backwashing. It uses a tower-shaped perforated plate cover to guide the input water to be purified, which can prevent excessive pressure of the input water from damaging the resin and also ensure that the water to be purified comes into more uniform contact with different resins.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A cation exchanger for easy backwashing includes a filter layer, a top cover, and a tank. The top of the tank is detachably connected to the top cover by bolts. The filter layer is disposed inside the tank and contains resin. A fourth channel communicating with the side wall of the tank is provided below the filter layer. A third channel is provided at the bottom of the tank. A tower-shaped perforated plate cover is provided at the top of the tank and is fixed to the top of the inner cavity of the top cover. A first channel and a second channel penetrate the top cover and communicate with the tower-shaped perforated plate cover.

[0007] Furthermore, the side wall of the tank above the filter layer is provided with multiple observation holes at evenly spaced longitudinal intervals.

[0008] Furthermore, a drainage tube is provided below the filter layer, and the drainage tube is connected to the fourth channel.

[0009] Furthermore, an exhaust port is provided on the top of the top cover.

[0010] Furthermore, a hanging lug is fixed to the top of the top cover, and a support leg is fixed to the bottom of the tank body.

[0011] Furthermore, a manhole is provided on the side wall of the tank.

[0012] Furthermore, the bottom of the first channel is connected to the branch pipe, and a filter screen is fixed to the outer periphery of the first channel and the branch pipe.

[0013] Furthermore, the filter layer includes a mesh bag and a flow guiding layer. The bottom of the mesh bag is fixed to the flow guiding layer. The flow guiding layer has multiple tower-shaped channels, and the multiple tower-shaped channels are connected by a connecting pipe.

[0014] Furthermore, an air pipe is fixed to the inner wall of the tank below the filter layer, and an air nozzle is provided at the top of the air pipe.

[0015] A method for using a cation exchanger that facilitates backwashing includes the following steps:

[0016] During water purification, resin and water to be purified are introduced into the tank through the first channel, and the air nozzle is activated at the same time. After a certain period of time, the air nozzle is closed, and the purified water is discharged from the tank through the third channel.

[0017] During resin regeneration, sulfuric acid solution is introduced into the tank through the second channel, and the air nozzle is activated at the same time. After a certain period of time, the air nozzle is closed, and the regeneration waste liquid is discharged from the tank through the fourth channel.

[0018] During backwashing, water is supplied to the tank through the third channel, and the air nozzle is activated at the same time. After a certain period of time, the air nozzle is closed, and the backwash waste liquid is discharged from the tank through the third and fourth channels.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The present invention uses a tower-shaped perforated plate cover to guide the input water to be purified, which can prevent excessive pressure of the input water from damaging the resin, and can also make the water to be purified come into more uniform contact with different resins.

[0021] 2. In this invention, the cation exchange resin is filled inside the filter layer. When the cation exchanger is under internal maintenance, all the cation exchange resin inside the cation exchanger can be taken out directly through the filter layer. This can replace the traditional method of pouring the resin into the spare bed, cleaning it, and then pouring it back into the cation bed. This avoids the problem of a large amount of resin being lost with the water flow during the operation and reduces unnecessary resin loss.

[0022] 3. This invention introduces compressed air into the tank through the air inlet / outlet 0, which accelerates the reaction speed inside the tank. The air nozzle can also pressurize the tank. If the pressure inside the tank is too high, the gas can be discharged out through the exhaust port 0.

[0023] 4. When it is necessary to disassemble the internal structure of the tank, the flange between the top cover and the tank body can be removed directly, and then the top cover can be lifted by the lugs to separate the top cover from the tank body, so that maintenance workers can enter the tank to work.

[0024] 5. The branch pipe of the present invention can deliver the water to be purified to the top of the tower-shaped perforated plate cover more evenly, reducing the impact of water flow on the tower-shaped perforated plate cover, and the filter screen can filter out some larger impurities.

[0025] 6. The various tower-shaped channels of the present invention are connected by a connecting pipe, and the diameter of the tower-shaped channel is smaller the closer it is to the net. With this structure, when water or air passes through the net from bottom to top, the water or air passing through the guide layer is interfered with by the intersecting paths, causing the water or air to create a turbulent impact on the net. At the same time, in conjunction with the arc-shaped net, the resin inside the net produces irregular movement when it reacts, which increases the contact area between the resin and the liquid, and improves the reaction speed and completeness. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the filter layer structure;

[0029] Figure 4 for Figure 3 Schematic diagram of the structure of region A in the middle;

[0030] Figure 5 This is a top view of the filter layer.

[0031] The attached diagram is labeled as follows:

[0032] 1. First channel; 2. Second channel; 3. Bolt; 4. Tower-shaped perforated plate cover; 5. Observation hole; 6. Filter layer; 61. Mesh bag; 62. Tower-shaped channel; 63. Flow guide layer; 64. Connecting pipe; 7. Drain pipe; 8. Gas pipe; 9. Third channel; 10. Exhaust port; 11. Hanging lug; 12. Fourth channel; 13. Gas nozzle; 14. Manhole; 15. Support leg; 16. Branch pipe; 17. Filter screen; 18. Top cover; 19. Tank body. Detailed Implementation

[0033] Please see Figures 1-5The cation exchanger for easy backwashing in this embodiment includes a filter layer 6, a top cover 18, and a tank 19. The top of the tank 19 is detachably connected to the top cover 18 by bolts 3. The filter layer 6 is disposed inside the tank 19 and contains resin. A fourth channel 12 is disposed below the filter layer 6 and communicates with the side wall of the tank 19. A third channel 9 is disposed at the bottom of the tank 19. A tower-shaped perforated plate cover 4 is disposed at the top of the tank 19 and is fixed to the top of the inner cavity of the top cover 18. The first channel 1 and the second channel 2 pass through the top cover 18 and communicate with the tower-shaped perforated plate cover 4.

[0034] This invention uses a tower-shaped perforated plate cover 4 to guide the input water to be purified. This prevents excessive water pressure from damaging the resin and ensures that the water to be purified contacts the different resins more evenly. The cation exchange resin is filled inside the filter layer 6. When performing internal maintenance on the cation exchanger, all the cation exchange resin inside the cation exchanger can be directly removed through the filter layer 6. This replaces the traditional method of pouring the resin into a spare bed, cleaning it, and then pouring it back into the cation bed, avoiding the problem of large amounts of resin being lost with the water flow during operation and reducing unnecessary resin loss.

[0035] Furthermore, multiple observation holes 5 are evenly spaced longitudinally on the side wall of the tank 19 above the filter layer 6.

[0036] The state of the liquid inside the tank 19 can be directly observed through the observation hole 5.

[0037] Furthermore, a drainage pipe 7 is provided below the filter layer 6, and the drainage pipe 7 is connected to the fourth channel 12.

[0038] The drainage pipe 7 can assist the first channel 12 in draining water.

[0039] Furthermore, an exhaust port 10 is provided on the top of the top cover 18.

[0040] Compressed air is supplied into the tank 19 through the air inlet / outlet 10, which accelerates the reaction speed inside the tank 19.

[0041] Furthermore, the top of the cover 18 is fixed with a hanging lug 11, and the bottom of the tank body 19 is fixed with a support leg 15.

[0042] When it is necessary to disassemble the internal structure of the tank 19, the flange between the top cover 18 and the tank 19 can be removed directly, and the top cover 18 can be lifted by the lug 11 to separate the top cover 18 and the tank 19, so that maintenance workers can enter the tank 19 to work.

[0043] Furthermore, a manhole 14 is provided on the side wall of the tank body 19.

[0044] If the device below the filter layer 6 malfunctions, maintenance workers can enter the tank 19 through the manhole 14 to carry out repairs. Compared to removing the top cover 18, the manhole 14 is easier to disassemble and assemble, which can reduce the labor intensity of workers.

[0045] Furthermore, the bottom of the first channel 1 is connected to the branch pipe 16, and a filter screen 17 is fixed on the outer periphery of the first channel 1 and the branch pipe 16.

[0046] Branch pipe 16 can deliver the water to be purified to the top of the tower-shaped perforated plate cover 4 more evenly, reducing the impact of water flow on the tower-shaped perforated plate cover 4. Filter screen 17 can filter some larger impurities.

[0047] Furthermore, the filter layer 6 includes a mesh bag 61 and a flow guiding layer 63. The bottom of the mesh bag 61 is fixed to the flow guiding layer 63. The flow guiding layer 63 has multiple tower-shaped channels 62, which are connected by a connecting pipe 64.

[0048] Each tower-shaped channel 62 is connected by a connecting pipe 64, and the diameter of the tower-shaped channel 62 is smaller the closer it is to the net 61. With this structure, when water or air passes through the net 61 from bottom to top, the water or air passing through the guide layer 63 is interfered with by the intersecting paths, causing the water or air to create a turbulent impact on the net 61. At the same time, in conjunction with the arc-shaped net 61, the resin inside the net 61 produces irregular movement when it reacts, which increases the contact area between the resin and the liquid, and improves the reaction speed and completeness.

[0049] Furthermore, an air pipe 8 is fixed to the inner wall of the tank 19 below the filter layer 6, and an air nozzle 13 is provided at the top of the air pipe 8.

[0050] Air nozzle 13 pumps air into filter layer 6, causing the gas to agitate the resin within the filter layer and improve the resin's reaction efficiency. Air nozzle 13 can also pressurize the tank 19 to increase the resin's reaction rate. If the internal pressure of the tank 19 is too high, the gas can be discharged through exhaust port 10.

[0051] The method of using the cation exchanger that facilitates backwashing in this embodiment includes the following steps:

[0052] When purifying water, resin and water to be purified are introduced into tank 19 through the first channel 1, and the air nozzle 13 is started at the same time. After a certain period of time, the air nozzle 13 is closed, and the purified water is discharged from tank 19 through the third channel 9.

[0053] Water flows through the first channel 1, branch pipe 16, and filter screen 17 on the outer periphery of the first channel 1 and branch pipe 16 into the conical perforated plate cover 4. When the water is sprayed onto the surface of the stainless steel conical perforated plate cover 4, the water flows down evenly through the holes of the conical perforated plate cover 4, effectively reducing the impact of the water flow on the cation exchange resin, greatly reducing the probability of resin breakage, and achieving a uniform water distribution effect.

[0054] During resin regeneration, sulfuric acid solution is introduced into tank 19 through second channel 2, and air nozzle 13 is activated at the same time. After a certain period of time, air nozzle 13 is closed, and the regeneration waste liquid is discharged from tank 19 through fourth channel 12.

[0055] During backwashing, water is supplied to tank 19 through the third channel 9, and air nozzle 13 is activated at the same time. After a certain period of time, air nozzle 13 is closed, and backwash waste liquid is discharged from tank 19 through the third channel 9 and the fourth channel 12.

[0056] During the resin backwashing process, the resin in the net bag 61 is pushed to the inner wall of the conical orifice plate cover 4 by the water flow, and falls down due to gravity after a period of time, returning to the backwashing state. The resin in the tank 19 is continuously lifted and fallen by the water. At the same time, the conical channel 62 pressurizes the water flow and gas, so that the resin can be thoroughly cleaned, give full play to the backwashing effect, solve the problem of rapid resin failure, and extend the operating cycle of the cation bed.

[0057] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cation exchanger for easy backwashing, comprising a filter layer (6), a top cover (18), and a tank (19), wherein the top of the tank (19) is detachably connected to the top cover (18) by bolts (3), the filter layer (6) is disposed inside the tank (19), and resin is disposed inside the filter layer (6); a fourth channel (12) communicating with the side wall of the tank (19) is disposed below the filter layer (6); and a third channel (9) is disposed at the bottom of the tank (19), characterized in that, The top of the tank (19) is provided with a tower-shaped perforated plate cover (4), which is fixed to the top of the inner cavity of the top cover (18); the first channel (1) and the second channel (2) both penetrate the top cover (18) and are connected to the tower-shaped perforated plate cover (4); the filter layer (6) includes a net bag (61) and a flow guide layer (63); the bottom of the net bag (61) is fixed to the flow guide layer (63); the flow guide layer (63) has multiple tower-shaped channels (62); the multiple tower-shaped channels (62) are connected by a connecting pipe (64); and the diameter of one end of the tower-shaped channel (62) is smaller the closer it is to the net bag (61); an air pipe (8) is fixed to the inner wall of the tank (19) below the filter layer (6); and an air nozzle (13) is provided at the top of the air pipe (8).

2. The cation exchanger for easy backwashing according to claim 1, characterized in that, Multiple observation holes (5) are evenly spaced longitudinally on the side wall of the tank (19) above the filter layer (6).

3. The cation exchanger for easy backwashing according to claim 1, characterized in that, A drainage tube (7) is provided below the filter layer (6), and the drainage tube (7) is connected to the fourth channel (12).

4. A cation exchanger for easy backwashing according to claim 1, characterized in that, The top of the top cover (18) is provided with an exhaust port (10).

5. A cation exchanger for easy backwashing according to claim 1, characterized in that, The top cover (18) is fixed with a hanging ear (11), and the bottom of the tank body (19) is fixed with a support leg (15).

6. A cation exchanger for easy backwashing according to claim 1, characterized in that, The tank (19) has a manhole (14) on its side wall.

7. A cation exchanger for easy backwashing according to claim 1, characterized in that, The bottom of the first channel (1) is connected to the branch pipe (16), and a filter screen (17) is fixed on the outer periphery of the first channel (1) and the branch pipe (16).

8. A method of using a cation exchanger that is easy to backwash as described in any one of claims 1-7, comprising the following steps: When purifying water, resin and water to be purified are introduced into the tank (19) through the first channel (1), and the air nozzle (13) is started at the same time. After a certain period of time, the air nozzle (13) is closed, and the purified water is discharged from the tank (19) through the third channel (9). When regenerating resin, sulfuric acid solution is introduced into tank (19) through the second channel (2), and the gas nozzle (13) is started at the same time. After a certain period of time, the gas nozzle (13) is closed, and the regenerated waste liquid is discharged from tank (19) through the fourth channel (12). During backwashing, water is supplied to the tank (19) through the third channel (9), and the air nozzle (13) is activated at the same time. After a certain period of time, the air nozzle (13) is closed, and the backwash waste liquid is discharged from the tank (19) through the third channel (9) and the fourth channel (12).

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