A filter membrane cartridge end structure

Abstract

The utility model belongs to the technical field of filter device relates to a filter membrane cylinder's head structure, including by upper and lower setting's upper head subassembly, membrane cylinder subassembly and lower head subassembly, the membrane cylinder subassembly includes membrane cylinder, tubular membrane and clean water mouth, the upper head subassembly includes upper head, air inlet and upper head high -rise pipe, the air inlet is located the top of upper head, upper head high -rise pipe is located between upper head and membrane cylinder, forms the air -washing water storage cavity in upper head high -rise pipe, the lower head subassembly includes lower head, water inlet and lower head high -rise pipe, the water inlet sets up in the lateral wall of lower head high -rise pipe, lower head high -rise pipe is located between lower head and membrane cylinder, forms the water inlet cavity in lower head high -rise pipe. The filter membrane cylinder's head structure provided by the utility model can obtain better filtering effect, better backwashing effect, and can also improve the service life of the membrane tube.

Description

Technical Field

[0001] This utility model belongs to the technical field of filtration devices, and relates to a sealing structure for a filter membrane cartridge. Background Technology

[0002] Existing filter membrane cartridges generally consist of a membrane cartridge assembly, an upper end cap, and a lower end cap, and are installed using a skid-mounted structure. The membrane cartridge assembly contains axially distributed tubular membranes. A clean water inlet is located on the side wall of the membrane cartridge, an air inlet is located at the top of the upper end cap, and a water inlet is located at the bottom of the lower end cap. During filtration, raw water enters through the water inlet, then flows into the membrane cartridge assembly, is filtered by the tubular membrane, and is output through the clean water inlet. During air-water backwashing, high-pressure gas enters through the air inlet, and backwash water is introduced through the clean water inlet. The backwash water mixes with the high-pressure gas to generate bubbles, which are then forced into the membrane cartridge. The membrane tubes are flushed by the air-water mixture containing the bubbles, and the backwash wastewater is then discharged through the water inlet.

[0003] Its shortcomings are: 1. The water storage space of the upper end cap is too small, and the distance between the air inlet and the end face of the membrane tube is limited. During air-water backwashing, the high-pressure gas is forced into the membrane cylinder and does not mix completely to generate enough bubbles. It is then sucked into the middle membrane tube channels by negative pressure (following the principle of proximity), resulting in an unsatisfactory backwashing effect on the surrounding membrane tubes; 2. The water inlet of the lower end cap is too small, which affects the discharge speed of backwash wastewater. Some dirt may remain on the side wall of the bottom end cap, causing it to return to the membrane tubes during normal operation; 3. According to the principle of proximity, during normal operation, the middle membrane tubes will be processed more frequently, while the surrounding ones will be processed less frequently. The service life of the membrane tubes in the entire membrane cylinder is inconsistent, and the service life of the middle membrane tubes is shortened. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a sealing structure for a filter membrane cartridge, which can achieve better filtration and backwashing effects, and also improve the service life of the membrane tube.

[0005] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution:

[0006] A filter membrane cartridge end cap structure includes an upper end cap assembly, a membrane cartridge assembly, and a lower end cap assembly arranged sequentially from top to bottom. The membrane cartridge assembly includes a membrane cartridge, a tubular membrane, and a clean water inlet. The upper end cap assembly includes an upper end cap, an air inlet, and an upper end cap reinforcement tube. The air inlet is located at the top of the upper end cap, and the upper end cap reinforcement tube is located between the upper end cap and the membrane cartridge. An air-washing water storage chamber is formed inside the upper end cap reinforcement tube. The lower end cap assembly includes a lower end cap, a water inlet, and a lower end cap reinforcement tube. The water inlet is disposed on the side wall of the lower end cap reinforcement tube, and the lower end cap reinforcement tube is located between the lower end cap and the membrane cartridge. A water inlet chamber is formed inside the lower end cap reinforcement tube.

[0007] In the above-mentioned end cap structure of a filter membrane cartridge, the upper end cap and the upper tube are integrally formed with the upper end cap, the lower end cap and the lower tube are integrally formed with the lower end cap, the upper end cap and the top of the membrane cartridge are fixed and sealed by the upper end cap flange, and the lower end cap and the bottom of the membrane cartridge are fixed and sealed by the lower end cap flange; the sealing structure adopts an axial sealing ring.

[0008] In the aforementioned end cap structure of a filter membrane cartridge, the axial dimension of the upper end cap plus the upper tube is 100-200mm.

[0009] In the aforementioned end cap structure of a filter membrane cartridge, the axial dimension of the lower end cap plus the upper tube is not less than 250mm.

[0010] In the aforementioned end cap structure of a filter membrane cartridge, the membrane cartridge, upper end cap, upper end cap reinforced tube, lower end cap, and lower end cap reinforced tube all adopt a first standard pipe diameter, and the inlet adopts a second standard pipe diameter. The first standard pipe diameter and the second standard pipe diameter are adjacent standard pipe diameters, and the second standard pipe diameter is smaller than the first standard pipe diameter. Specifically, the first standard pipe diameter can be DN200, DN250, DN300, DN350, DN400, DN450, DN500, etc. When the first standard pipe diameter is DN500, the second standard pipe diameter can be DN450. When the first standard pipe diameter is DN300, the second standard pipe diameter can be DN250.

[0011] In the aforementioned end cap structure of a filter membrane cartridge, the bottom of the lower end cap is welded with several fixed support feet, which are fixedly connected to the ground.

[0012] Alternatively, in one of the above-mentioned filter membrane cartridge end cap structures, the bottom of the lower end cap is fixedly connected to the ground via the end face of a circular tube.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. This utility model provides a sealing structure for a filter membrane cartridge, in which an upper sealing tube is added to the upper sealing tube, forming an air-wash water storage chamber. This increases both the water storage capacity during backwashing and the mixing stroke during backwashing. During air-water backwashing, high-pressure gas is forced into the membrane cartridge, allowing the air bubbles and liquid in the water storage space to mix thoroughly. This not only improves the mixing effect and increases the amount of air bubbles, but also evenly distributes the air-water mixture to all membrane tubes of the cartridge, thereby improving the backwashing effect.

[0015] 2. This utility model also adds a lower end cap reinforcement tube at the lower end cap, and sets the water inlet on the side wall of the lower end cap reinforcement tube. This structure increases the diameter of the raw water inlet, allowing for rapid discharge of backwash wastewater. Even if residual contaminants remain, they will only accumulate at the bottom of the lower end cap. During normal operation, contaminants falling from the raw water or membrane tubes will also collect at the bottom and be discharged during backwashing. Furthermore, by setting a side raw water inlet, the raw water inlet path is changed. The raw water first enters the inlet chamber radially, and after the inlet chamber is full, it evenly enters each membrane tube, preventing uneven membrane tube usage due to proximity and thus improving membrane tube lifespan.

[0016] 3. Due to the changes in the structure of the lower end cap, the upper tube, and the inlet, this utility model can further improve the installation method. It no longer uses a skid-mounted structure and can be installed on-site or by considering a simple and reliable membrane tube fixing method, thereby reducing the installation period and installation cost. Attached Figure Description

[0017] Figure 1 This is a perspective view of Embodiment 1 of this utility model;

[0018] Figure 2 yes Figure 1 Axial sectional view;

[0019] Figure 3 This is an axial sectional view of Embodiment 2 of this utility model;

[0020] Reference numerals: 1. Membrane tube; 2. Tubular membrane; 3. Clean water inlet; 4. Upper end cap; 5. Air inlet; 6. Upper end cap with reinforced tube; 7. Air washing water storage chamber; 8. Lower end cap; 9. Water inlet; 10. Lower end cap with reinforced tube; 11. Water inlet chamber; 12. Upper end cap flange; 13. Lower end cap flange; 14. Fixed support foot. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-3 :

[0022] Example 1

[0023] A filter membrane cartridge 1 has a sealing structure comprising an upper sealing head 4 assembly, a membrane cartridge 1 assembly, and a lower sealing head 8 assembly arranged sequentially from top to bottom. The membrane cartridge 1 assembly includes a membrane cartridge 1, a tubular membrane 2, and a clean water inlet 3. The upper sealing head 4 assembly includes an upper sealing head 4, an air inlet 5, and an upper sealing head reinforcement tube 6. The air inlet 5 is located at the top of the upper sealing head 4, and the upper sealing head reinforcement tube 6 is located between the upper sealing head 4 and the membrane cartridge 1. An air-washing water storage chamber 7 is formed inside the upper sealing head reinforcement tube 6. The lower sealing head 8 assembly includes a lower sealing head 8, a water inlet 9, and a lower sealing head reinforcement tube 10. The water inlet 9 is disposed on the side wall of the lower sealing head reinforcement tube 10, and the lower sealing head reinforcement tube 10 is located between the lower sealing head 8 and the membrane cartridge 1. An inlet chamber 11 is formed inside the lower sealing head reinforcement tube 10.

[0024] Comparison Appendix Figure 1 and attached Figure 2 The purification and backwashing process in this embodiment is similar to that in the prior art. During purification, raw water enters through the side inlet 9 and first flows radially into the inlet chamber 11. After filling the inlet chamber 11, it flows evenly into the membrane tube 1 assembly. After being filtered by the tubular membrane 2, it is output from the clean water outlet 3. During air-water backwashing, high-pressure gas enters the air-washing water storage chamber 7 through the air inlet 5. Backwash water enters the air-washing water storage chamber 7 through the clean water outlet 3 via a high-pressure pump. In the air-washing water storage chamber 7, the backwash water and high-pressure gas are fully mixed to generate bubbles. The bubbles are then driven by pressure into the membrane tube 1. The air-water mixture containing bubbles backwashes the membrane tube, causing the dirt attached to the membrane tube to be removed. Then, the backwash wastewater is discharged from the inlet 9.

[0025] In this embodiment, the upper end cap reinforcement tube 6 is integrally formed with the upper end cap 4, and the lower end cap reinforcement tube 10 is integrally formed with the lower end cap 8. The upper end cap reinforcement tube 6 is fixed and sealed to the top of the membrane cylinder 1 through the flange of the upper end cap 4, and the lower end cap reinforcement tube 10 is fixed and sealed to the bottom of the membrane cylinder 1 through the flange of the lower end cap 8. The sealing structure adopts an axial sealing ring.

[0026] In this embodiment, the axial dimension of the upper end cap and the upper tube 6 is 100-200mm to meet the requirements of air washing water storage and air-water mixing stroke, so that the reverse bubble water is evenly distributed in the water storage chamber.

[0027] In this embodiment, the axial dimension of the lower end cap and the upper tube 10 is not less than 250mm. This axial dimension can be set according to the diameter of the membrane tube 1 and the inlet 9 to meet the needs of the inlet 9 diameter expansion.

[0028] In this embodiment, the inlet 9 adopts the following standard expansion: the membrane tube 1, the upper end cap 4, the upper end cap reinforced tube 6, the lower end cap 8, and the lower end cap reinforced tube 10 all adopt the first standard pipe diameter, and the inlet 9 adopts the second standard pipe diameter. The first standard pipe diameter and the second standard pipe diameter are adjacent standard pipe diameters, and the second standard pipe diameter is smaller than the first standard pipe diameter.

[0029] This embodiment further improves the installation structure: several fixed support feet 14 are welded to the bottom of the lower end cap 8, and the fixed support feet 14 are fixedly connected to the ground.

[0030] Example 2

[0031] Comparison Appendix Figure 3 The only difference between this embodiment and embodiment 1 is the installation structure. In this embodiment, the bottom of the lower end cap 8 is fixedly connected to the ground through the end face of a round tube.

[0032] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A sealing structure for a filter membrane cartridge, comprising an upper sealing assembly, a membrane cartridge assembly, and a lower sealing assembly arranged sequentially from top to bottom, wherein the membrane cartridge assembly includes a membrane cartridge (1), a tubular membrane (2), and a water outlet (3), characterized in that, The upper end cap assembly includes an upper end cap (4), an air inlet (5), and an upper end cap reinforcement tube (6). The air inlet (5) is located at the top of the upper end cap (4), and the upper end cap reinforcement tube (6) is located between the upper end cap (4) and the membrane tube (1). An air-washing water storage chamber (7) is formed inside the upper end cap reinforcement tube (6). The lower end cap assembly includes a lower end cap (8), a water inlet (9), and a lower end cap reinforcement tube (10). The water inlet (9) is located on the side wall of the lower end cap reinforcement tube (10), and the lower end cap reinforcement tube (10) is located between the lower end cap (8) and the membrane tube (1). A water inlet chamber (11) is formed inside the lower end cap reinforcement tube (10).

2. The end cap structure of a filter membrane cartridge according to claim 1, characterized in that, The upper end cap and the upper end cap (6) are integrally formed with the upper end cap (4), the lower end cap and the lower end cap (10) are integrally formed with the lower end cap (8), the upper end cap and the upper end cap (6) are fixed and sealed to the top of the membrane cylinder (1) through the upper end cap flange (12), and the lower end cap and the lower end cap (10) are fixed and sealed to the bottom of the membrane cylinder (1) through the lower end cap flange (13).

3. The end cap structure of a filter membrane cartridge according to claim 1, characterized in that, The axial dimension of the upper head and the high tube (6) is 100-200mm.

4. The end cap structure of a filter membrane cartridge according to claim 1, characterized in that, The axial dimension of the lower head and upper tube (10) is not less than 250mm.

5. The end cap structure of a filter membrane cartridge according to claim 1, characterized in that, The membrane tube (1), upper end cap (4), upper end cap with high-pressure tube (6), lower end cap (8) and lower end cap with high-pressure tube (10) all adopt the first standard pipe diameter, and the water inlet (9) adopts the second standard pipe diameter. The first standard pipe diameter and the second standard pipe diameter are adjacent standard pipe diameters and the second standard pipe diameter is smaller than the first standard pipe diameter.

6. The end cap structure of a filter membrane cartridge according to claim 1, characterized in that, The bottom of the lower end cap (8) is welded with several fixed support feet (14), which are fixedly connected to the ground.

7. The end cap structure of a filter membrane cartridge according to claim 1, characterized in that, The bottom of the lower end cap (8) is fixedly connected to the ground through the end face of the round tube.

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