Cation exchanger convenient for backwashing and use method thereof

Abstract

The invention relates to the technical field of cation exchangers, in particular to a cation exchanger convenient to backwash and a using method thereof.The cation exchanger convenient to backwash comprises a filter layer, a top cover and a tank, the top of the tank is detachably connected with the top cover through bolts, the filter layer is arranged in the tank, and resin is arranged in the filter layer; a fourth channel communicated with the side wall of the tank body is arranged below the filter layer; a third channel is arranged at the bottom of the tank body, a tower-shaped pore plate cover is arranged at the top of the tank body, and the tower-shaped pore plate cover is fixed with the top of the inner cavity of the top cover; the first channel and the second channel penetrate through the top cover and then are communicated with the tower-shaped pore plate cover, the tower-shaped pore plate cover is used for guiding input water to be purified, the situation that the pressure of the input water is too large, and resin is damaged can be prevented, and the water to be purified can make uniform contact with different kinds of resin.

Description

Technical Field

[0001] The invention relates to the technical field of cation exchangers, in particular to a cation exchanger convenient for backwashing and a use method thereof. Background Art

[0002] Cation exchangers, also known as cation beds, are an important part of water purification systems because they can remove sodium, magnesium, calcium and other cations from water. When choosing a cation exchanger, you need to consider factors such as water quality requirements, water volume, operating costs, and maintenance requirements to determine the most appropriate type and configuration.

[0003] The Chinese utility model patent with authorization announcement number CN220861480U, published on April 30, 2024, discloses a new type of ultra-clean and high-purity membrane cation exchanger, which is equipped with a pure PFA membrane and a polyimide membrane. The inner wall of the tank is attached to the pure PFA membrane, and the outer wall is covered with a layer of corrosion-resistant polyimide membrane. The entire exchanger can withstand the erosion of strong acids and strong alkalis during operation, and has extremely high chemical stability and service life. However, when the water to be purified is input, the impact of water on the resin may cause damage to the resin. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a cation exchanger which is convenient for backwashing and a method for using the same. The cation exchanger uses a tower-shaped perforated plate cover to guide the input water to be purified, which can prevent the input water pressure from being too high to damage the resin and can make the water to be purified contact with different resins more evenly.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A cation exchanger convenient for backwashing comprises a filter layer, a top cover and a tank body, wherein the top of the tank body is detachably connected to the top cover by bolts, the filter layer is arranged inside the tank body, and resin is arranged inside the filter layer; a fourth channel connected to the side wall of the tank body is arranged below the filter layer; a third channel is arranged at the bottom of the tank body, a tower-shaped orifice plate cover is arranged on the top of the tank body, and the tower-shaped orifice plate cover is fixed to the top of the inner cavity of the top cover; a first channel and a second channel are connected to the tower-shaped orifice plate cover after penetrating the top cover.

[0007] Furthermore, a plurality of observation holes are evenly spaced longitudinally on the side wall of the tank body above the filter layer.

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

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

[0010] Furthermore, a hanging ear is fixed on the top of the top cover, and a supporting leg is fixed on the bottom of the tank body.

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

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

[0013] Furthermore, the filter layer includes a mesh bag and a guide layer, the bottom of the mesh bag is fixed to the guide layer, the guide layer is provided with a plurality of tower-shaped channels, and the plurality of tower-shaped channels are connected by a connecting pipe.

[0014] Furthermore, an air pipeline is fixed to the inner wall of the tank below the filter layer, and an air nozzle is arranged on the top of the air pipeline.

[0015] A method for using a cation exchanger that is convenient for backwashing comprises the following steps:

[0016] When purifying water, resin and water to be purified are input into the tank through the first channel, and the air nozzle is started 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] When regenerating the resin, sulfuric acid solution is input into the tank through the second channel, and the air nozzle is started 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 transported into the tank through the third channel, and the air nozzle is started at the same time. The air nozzle is closed after a certain period of time, and the backwash waste liquid is discharged from the tank through the third channel and the fourth channel at the same time.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention uses a tower-shaped perforated plate cover to guide the input water to be purified, which can prevent the input water pressure from being too high to damage the resin and can also make the water to be purified contact with different resins more evenly.

[0021] 2. In the present invention, the cation exchange resin is filled inside the filter layer. When the cation exchanger is undergoing internal maintenance, all the cation exchange resins in the cation exchanger can be directly taken out through the filter layer, which can replace the traditional operation of pouring the resin into the spare bed and then pouring it back into the cation bed after cleaning, thereby avoiding the problem of large-scale loss of resin with water during operation and reducing unnecessary resin loss.

[0022] 3. The present invention delivers compressed air into the tank body through the air inlet and outlet 0, which accelerates the reaction speed inside the tank body. The air nozzle can also play the function of pressurizing the tank body. If the pressure inside the tank body is too high, the gas can be discharged to the outside through the exhaust port 0.

[0023] 4. When the internal structure of the tank needs to be disassembled, the flange between the top cover and the tank body can be directly removed, and then the top cover can be lifted by the hanging ears to separate the top cover and the tank body, so that maintenance workers can enter the tank to work.

[0024] 5. The branch pipe of the present invention can transport the water to be purified to the top of the tower-shaped orifice cover in a relatively uniform manner, thereby reducing the impact of the water flow on the tower-shaped orifice cover, and the filter screen can filter some larger impurities.

[0025] 6. The tower-shaped channels of the present invention are connected by connecting pipes, and the diameter of one end of the tower-shaped channel is smaller as it is closer to the net bag. With this structure, when water or air passes through the net bag from bottom to top, the water or air passing through the guide layer is interfered by the staggered paths, causing the water or wind to form a chaotic impact on the net bag. At the same time, with the help of the arc-shaped net bag, the resin inside the net bag will produce irregular movement when reacting, which has the effect of increasing the contact area between the resin and the liquid, and improving the reaction speed and sufficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

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

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

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

[0030] Figure 5 A top view of the filter layer.

[0031] The accompanying drawings are marked as:

[0032] 1. First channel; 2. Second channel; 3. Bolts; 4. Tower-shaped orifice cover; 5. Observation hole; 6. Filter layer; 61. Net bag; 62. Tower-shaped channel; 63. Guide layer; 64. Connecting pipe; 7. Drainage pipe; 8. Air duct; 9. Third channel; 10. Exhaust port; 11. Hanging ear; 12. Fourth channel; 13. Air nozzle; 14. Manhole; 15. Leg; 16. Branch pipe; 17. Filter; 18. Top cover; 19. Tank body. DETAILED DESCRIPTION

[0033] See also Figure 1-Figure 5The cation exchanger for backwashing of the present embodiment comprises a filter layer 6, a top cover 18 and a tank body 19. The top of the tank body 19 is detachably connected to the top cover 18 by bolts 3. The filter layer 6 is arranged inside the tank body 19, and resin is arranged inside the filter layer 6. A fourth channel 12 connected to the side wall of the tank body 19 is arranged below the filter layer 6. A third channel 9 is arranged at the bottom of the tank body 19, and a tower-shaped orifice plate cover 4 is arranged on the top of the tank body 19. The tower-shaped orifice plate cover 4 is fixed to the top of the inner cavity of the top cover 18. The first channel 1 and the second channel 2 are connected to the tower-shaped orifice plate cover 4 after passing through the top cover 18.

[0034] The present invention uses a tower-shaped perforated plate cover 4 to guide the input water to be purified, which can prevent the input water pressure from being too high to damage the resin, and can also make the water to be purified contact with different resins more evenly. The cation exchange resin is filled in the filter layer 6. When the cation exchanger is internally repaired, all the cation exchange resins in the cation exchanger can be directly taken out through the filter layer 6, which can replace the operation of pouring the resin into the spare bed in the traditional mode, and then pouring it back into the cation bed after cleaning, avoiding the problem of a large amount of resin loss with the water flow during the operation, and reducing unnecessary resin loss.

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

[0036] The state of the liquid in the tank body 19 can be visually seen 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 tube 7 can assist the first channel 12 in draining water.

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

[0040] Compressed air is introduced into the tank body 19 through the air inlet and outlet 10 , which has the effect of accelerating the reaction speed inside the tank body 19 .

[0041] Furthermore, a hanging ear 11 is fixed to the top of the top cover 18 , and a supporting leg 15 is fixed to the bottom of the tank body 19 .

[0042] When the internal structure of the tank body 19 needs to be disassembled, the flange between the top cover 18 and the tank body 19 can be directly removed, and then the top cover 18 can be lifted by the hanging ear 11 to separate the top cover 18 and the tank body 19, so that the maintenance worker can enter the tank body 19 to work.

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

[0044] If a problem occurs with the device below the filter layer 6, maintenance workers can enter the tank body 19 through the manhole 14 to perform maintenance work. Compared with removing the top cover 18, the manhole 14 is easy 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 to the outer periphery of the first channel 1 and the branch pipe 16 .

[0046] The branch pipe 16 can transport the water to be purified to the top of the tower-shaped orifice cover 4 in a relatively uniform manner, thereby reducing the impact of the water flow on the tower-shaped orifice cover 4, and the filter screen 17 can filter some larger impurities.

[0047] Furthermore, the filter layer 6 includes a mesh bag 61 and a guide layer 63 . The bottom of the mesh bag 61 is fixed to the guide layer 63 . The guide layer 63 is provided with a plurality of tower-shaped channels 62 . The plurality of tower-shaped channels 62 are connected by a connecting pipe 64 .

[0048] Each tower-shaped channel 62 is connected by a connecting pipe 64, and the diameter of one end of the tower-shaped channel 62 is smaller as it is closer to the net bag 61. With this structure, when water or air passes through the net bag 61 from bottom to top, the water or air passing through the guide layer 63 is interfered by the staggered paths, causing the water or wind to form a chaotic impact on the net bag 61. At the same time, with the arc-shaped net bag 61, the resin inside the net bag 61 produces irregular movement when reacting, which has the effect of increasing the contact area between the resin and the liquid, and improving the reaction speed and sufficiency.

[0049] Furthermore, an air pipeline 8 is fixed to the inner wall of the tank body 19 below the filter layer 6 , and an air nozzle 13 is arranged on the top of the air pipeline 8 .

[0050] The air nozzle 13 pumps air into the filter layer 6 so that the air stirs the resin in the filter layer to improve the reaction efficiency of the resin. The air nozzle 13 can also pressurize the tank 19 to increase the reaction speed of the resin. If the pressure inside the tank 19 is too high, the air can be discharged to the outside through the exhaust port 10.

[0051] The method for using the cation exchanger for backwashing of this embodiment comprises the following steps:

[0052] When purifying water, resin and water to be purified are input into the tank body 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 body 19 through the third channel 9;

[0053] The water flows through the first channel 1, the branch pipe 16, and the filter screen 17 on the periphery of the first channel 1 and the branch pipe 16 into the top of the conical orifice cover 4. When the water flows onto the surface of the conical orifice cover 4 made of stainless steel, the water flows down evenly through the holes of the conical orifice 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] When regenerating the resin, sulfuric acid solution is input into the tank body 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 regeneration waste liquid is discharged from the tank body 19 through the fourth channel 12;

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

[0056] During the resin backwashing process, the resin in the net bag 61 is pushed to the inner wall of the conical orifice cover 4 under the action of water flow, and falls down due to gravity after a period of time, returning to the backwashing state. The resin in the tank body 19 is continuously lifted and dropped by the water, and at the same time, the conical channel 62 pressurizes the water flow and gas, so that the resin can be thoroughly cleaned, giving full play to the backwashing effect, solving the problem of rapid resin failure, and extending the operation cycle of the cation bed.

[0057] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cation exchanger convenient for backwashing, comprising a filter layer (6), a top cover (18) and a tank body (19), wherein the top of the tank body (19) is detachably connected to the top cover (18) by bolts (3), the filter layer (6) is arranged inside the tank body (19), and resin is arranged inside the filter layer (6); a fourth channel (12) connected to the side wall of the tank body (19) is arranged below the filter layer (6); a third channel (9) is arranged at the bottom of the tank body (19), characterized in that: A tower-shaped orifice plate cover (4) is arranged on the top of the tank body (19), and the tower-shaped orifice plate cover (4) is fixed to the top of the inner cavity of the top cover (18); the first channel (1) and the second channel (2) penetrate the top cover (18) and are connected to the tower-shaped orifice plate cover (4).

2. A cation exchanger that is easy to backwash according to claim 1, characterized in that: A plurality of observation holes (5) are evenly spaced longitudinally on the side wall of the tank body (19) above the filter layer (6).

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

4. A cation exchanger that is easy to backwash 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 convenient for backwashing according to claim 1, characterized in that: A hanging ear (11) is fixed on the top of the top cover (18), and a supporting leg (15) is fixed on the bottom of the tank body (19).

6. A cation exchanger that is easy to backwash according to claim 1, characterized in that: A manhole (14) is provided on the side wall of the tank body (19).

7. A cation exchanger convenient for 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 cation exchanger convenient for backwashing according to claim 1, characterized in that: The filter layer (6) comprises a net bag (61) and a guide layer (63); the bottom of the net bag (61) is fixed to the guide layer (63); the guide layer (63) is provided with a plurality of tower-shaped channels (62); and the plurality of tower-shaped channels (62) are connected by a connecting pipe (64).

9. A cation exchanger that is easy to backwash according to claim 1, characterized in that: An air pipeline (8) is fixed to the inner wall of the tank body (19) below the filter layer (6), and an air nozzle (13) is arranged at the top of the air pipeline (8).

10. A method for using a cation exchanger that is convenient for backwashing, characterized in that: The method for using a cation exchanger that is convenient for backwashing as claimed in any one of claims 1 to 9 comprises the following steps: When purifying water, resin and water to be purified are input into the tank body (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 body (19) through the third channel (9); When regenerating the resin, sulfuric acid solution is input into the tank body (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 regeneration waste liquid is discharged from the tank body (19) through the fourth channel (12); During backwashing, water is supplied to the tank body (19) through the third channel (9), 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 backwash waste liquid is discharged from the tank body (19) through the third channel (9) and the fourth channel (12) at the same time.

Images