External pressure type hollow fiber membrane

Abstract

The utility model discloses an external pressure type hollow fiber membrane which comprises a shell, a water inlet pipe is arranged above the shell, a sewage pipe is arranged below the shell, a supporting pipe is arranged in the shell, permeation holes are formed in the outer side surface of the supporting pipe, water outlet pipes are fixed at the two ends of the supporting pipe, and a water outlet pipe is arranged in the shell. A hollow fiber mold main body is arranged outside the supporting pipe in a sleeving manner; according to the external pressure type hollow fiber membrane, through cooperative use of the end cover, the first sealing ring and the second sealing ring, the sealing performance of the joint of the end cover and the shell can be improved through the arrangement of the first sealing ring, and a stock solution in the shell is prevented from leaking from the joint of the end cover and the shell; the arrangement of the second sealing ring can improve the sealing performance of the joint of the end cover and the outer wall of the water outlet pipe, so that the stock solution can be prevented from leaking from a gap of the outer wall of the water outlet pipe, the sealing performance of the device is effectively improved, and meanwhile, the first sealing ring and the second sealing ring can be conveniently replaced after the end cover is detached.

Description

Technical Field

[0001] The utility model relates to the technical field related to hollow fiber membranes, in particular to an external pressure type hollow fiber membrane. Background Art

[0002] Hollow fiber membrane refers to a membrane that looks like a fiber and has a self-supporting function. The hollow fiber membrane is made of polysulfone and dimethylacetamide as raw materials to form a fiber filament with a hollow inner cavity, and then divided by a high permeability polymer. It has selective permeation characteristics. Since water vapor, hydrogen, ammonia and carbon dioxide permeate faster, while methane, nitrogen, argon, oxygen and carbon monoxide permeate slower, the fast-permeating and slow-permeating substances are separated. In the external pressure hollow fiber membrane, the raw liquid applies pressure from the outside of the membrane and permeates through the outside of the hollow fiber to the inside, so that the permeated liquid is formed, and the retained substances are gathered on the outside of the hollow fiber.

[0003] However, the sealing measures of existing hollow fiber membranes are not perfect. When filtering the raw liquid, the raw liquid is easy to leak from the connection between the outer shell and the end cover. At the same time, there is also the possibility of raw liquid leakage at the connection between the water outlet pipe and the end cover. The sealing effect is not good. Therefore, this application provides an external pressure hollow fiber membrane to meet the needs. Utility Model Content

[0004] The purpose of the utility model is to provide an external pressure type hollow fiber membrane to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an external pressure type hollow fiber membrane, comprising an outer shell, a water inlet pipe is installed above the outer shell, a sewage pipe is installed below the outer shell, a support tube is arranged inside the outer shell, the outer surface of the support tube is provided with a penetration hole, water outlet pipes are fixed at both ends of the support tube, a hollow fiber membrane body is sleeved on the outside of the support tube, fixing seats are fixed at both ends of the outer shell, end covers are installed at both ends of the outer shell, a first sealing ring is fitted on one side of the end cover, and a second sealing ring is fitted inside the end cover.

[0006] Preferably, the sewage pipe and the water inlet pipe are centrally symmetrically arranged, and the sewage pipe and the water inlet pipe are used in conjunction with each other.

[0007] Preferably, the permeation holes are distributed at equal intervals on the outside of the support tube, and the support tube matches the size of the hollow fiber mold body.

[0008] Preferably, a fixing plate is fixed to the outer side of the end cover, and a fixing bolt penetrates one side of the fixing plate.

[0009] Preferably, the fixing plate is arranged corresponding to the fixing seat, and the inner side of the fixing seat is arranged in a threaded shape.

[0010] Preferably, the first sealing ring is consistent in shape with the end cover, and the first sealing ring fits and contacts one side of the end cover.

[0011] Preferably, the second sealing ring is connected to the end cover by adhesive bonding, and the inner diameter of the second sealing ring matches the outer diameter of the water outlet pipe.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The external pressure type hollow fiber membrane, through the coordinated use of the end cover, the first sealing ring and the second sealing ring, the setting of the first sealing ring can improve the sealing performance of the connection between the end cover and the shell, and prevent the raw liquid inside the shell from leaking from the connection between the end cover and the shell, and the setting of the second sealing ring can improve the sealing performance of the connection between the end cover and the outer wall of the outlet pipe, thereby preventing the raw liquid from leaking from the gap of the outer wall of the outlet pipe, effectively improving the sealing performance of the device, and at the same time, it is convenient to replace the first sealing ring and the second sealing ring after the end cover is removed;

[0014] 2. This external pressure type hollow fiber membrane, through the arrangement of the support tube, the permeation hole and the water outlet pipe, the support tube supports the hollow fiber mold body inside the shell, and at the same time, after the raw liquid permeates from the outside to the inside of the hollow fiber mold body, the permeated liquid can enter the inside of the support tube from the permeation hole, and then be discharged from the water outlet pipes on both sides of the support tube. The arrangement of multiple groups of permeation holes effectively improves the permeation effect;

[0015] 3. This kind of external pressure hollow fiber membrane is arranged by fixing the base, end cover, fixing plate and fixing bolts. After long-term use of the device, the filtering effect of the hollow fiber mold body will decrease. The end cover can be opened by unscrewing the fixing bolts, so that the hollow fiber mold body can be easily pulled out from the inside of the shell for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the housing of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the support pipe of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the end cover of the utility model.

[0020] In the figure: 1. outer shell; 2. water inlet pipe; 3. sewage pipe; 4. support pipe; 5. penetration hole; 6. water outlet pipe; 7. hollow fiber mold body; 8. fixing seat; 9. end cover; 10. fixing plate; 11. fixing bolt; 12. first sealing ring; 13. second sealing ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-3 The utility model provides a technical solution: an external pressure type hollow fiber membrane, comprising a shell 1, a water inlet pipe 2 is installed above the shell 1, a sewage pipe 3 is installed below the shell 1, the sewage pipe 3 and the water inlet pipe 2 are centrally symmetrically arranged, the sewage pipe 3 and the water inlet pipe 2 are used in conjunction with each other, the water inlet pipe 2 is used to access the raw liquid, and the sewage pipe 3 is used to discharge the impurities that cannot pass through the hollow fiber mold body 7, a support tube 4 is arranged inside the shell 1, and the outer surface of the support tube 4 is provided with permeation holes 5, the permeation holes 5 are evenly spaced on the outer side of the support tube 4, the size of the support tube 4 is consistent with that of the hollow fiber mold body 7, the permeated liquid can enter the inside of the support tube 4 from the permeation holes 5, and then be discharged from the water outlet pipes 6 on both sides of the support tube 4, the setting of multiple groups of permeation holes 5 effectively improves the permeation effect, the two ends of the support tube 4 are fixed with water outlet pipes 6, the outer sleeve of the support tube 4 is provided with a hollow fiber mold body 7, and the two ends of the shell 1 are fixed with fixing seats 8;

[0023] See also Figure 1 and Figure 4 , both ends of the housing 1 are equipped with end covers 9, and a fixing sheet 10 is fixed on the outside of the end cover 9. A fixing bolt 11 is passed through one side of the fixing sheet 10. The end cover 9 can be opened by unscrewing the fixing bolt 11, so that the hollow fiber mold body 7 can be easily pulled out from the inside of the housing 1 for replacement. The fixing sheet 10 is arranged correspondingly to the fixing seat 8, and the inner side of the fixing seat 8 is arranged in a threaded shape, which has a good fixing effect on the end cover 9 and will not easily loosen. A first sealing ring 12 is attached to one side of the end cover 9. The first sealing ring 12 is consistent with the shape of the end cover 9, and the first sealing ring 12 is in the same shape as the end cover 9. 9 is fitted and abutted against one side, and the setting of the first sealing ring 12 can improve the sealing performance of the connection between the end cover 9 and the outer shell 1, and prevent the raw liquid inside the outer shell 1 from leaking from the connection between the end cover 9 and the outer shell 1. The inside of the end cover 9 is fitted with a second sealing ring 13, and the second sealing ring 13 and the end cover 9 are adhesively connected. The inner diameter of the second sealing ring 13 coincides with the outer diameter of the water outlet pipe 6. The setting of the second sealing ring 13 can improve the sealing performance of the connection between the end cover 9 and the outer wall of the water outlet pipe 6, thereby preventing the raw liquid from leaking from the gap in the outer wall of the water outlet pipe 6, and effectively improving the sealing performance of the device.

[0024] Working principle: When using the external pressure hollow fiber membrane, first connect the raw liquid from the water inlet pipe 2 to the inside of the shell 1. The raw liquid penetrates from the outside of the hollow fiber mold body 7 to the inside of the shell 1, and the permeated liquid can enter the inside of the support tube 4 from the penetration hole 5, and then be discharged from the water outlet pipes 6 on both sides of the support tube 4. Secondly, the first sealing ring 12 and the second sealing ring 13 can improve the sealing performance of the device to prevent the raw liquid from leaking from the connecting gap, and the impurities that cannot pass through the hollow fiber mold body 7 are discharged from the sewage pipe 3. Finally, the fixing bolts 11 can be unscrewed to open the end cover 9, so that the hollow fiber mold body 7 can be pulled out from the inside of the shell 1 for replacement. In this way, the use process of the external pressure hollow fiber membrane is completed.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An external pressure hollow fiber membrane, comprising a housing (1), characterized in that: A water inlet pipe (2) is installed above the shell (1), a sewage pipe (3) is installed below the shell (1), a support pipe (4) is arranged inside the shell (1), a penetration hole (5) is opened on the outer surface of the support pipe (4), water outlet pipes (6) are fixed at both ends of the support pipe (4), a hollow fiber mold body (7) is sleeved on the outside of the support pipe (4), a fixing seat (8) is fixed at both ends of the shell (1), and end covers (9) are installed at both ends of the shell (1), a first sealing ring (12) is attached to one side of the end cover (9), and a second sealing ring (13) is attached to the inside of the end cover (9).

2. The external pressure hollow fiber membrane according to claim 1, characterized in that: The sewage pipe (3) and the water inlet pipe (2) are centrally symmetrically arranged, and the sewage pipe (3) and the water inlet pipe (2) are used in conjunction with each other.

3. The external pressure hollow fiber membrane according to claim 1, characterized in that: The permeation holes (5) are distributed at equal intervals on the outside of the support tube (4), and the size of the support tube (4) matches that of the hollow fiber mold body (7).

4. The external pressure hollow fiber membrane according to claim 1, characterized in that: A fixing plate (10) is fixed to the outer side of the end cover (9), and a fixing bolt (11) penetrates one side of the fixing plate (10).

5. The external pressure hollow fiber membrane according to claim 4, characterized in that: The fixing plate (10) is arranged corresponding to the fixing seat (8), and the inner side of the fixing seat (8) is arranged in a threaded shape.

6. The external pressure hollow fiber membrane according to claim 1, characterized in that: The first sealing ring (12) has the same shape as the end cover (9), and the first sealing ring (12) is in close contact with one side of the end cover (9).

7. The external pressure hollow fiber membrane according to claim 1, characterized in that: The second sealing ring (13) is connected to the end cover (9) by adhesive bonding, and the inner diameter of the second sealing ring (13) matches the outer diameter of the water outlet pipe (6).

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