CN220143053U - High sealed filtering membrane package - Google Patents

Abstract

The utility model discloses a high-sealing filtering membrane package, which comprises at least one membrane package unit, wherein the membrane package unit comprises a liquid inlet channel layer, a filtering membrane layer and a penetrating liquid channel layer, the filtering membrane layer is respectively arranged on two sides of the penetrating liquid channel layer, the liquid inlet channel layer is arranged on the outer side of the filtering membrane layer, the membrane package unit is provided with a liquid inlet, a liquid outlet and an air outlet which are corresponding in position on the liquid inlet channel layer, the filtering membrane layer and the penetrating liquid channel layer, the liquid outlet of the liquid inlet channel layer is provided with a liquid outlet elastic bulge, the membrane package unit is provided with a framework layer on the upstream side and/or the downstream side of the filtering membrane layer, the framework layer comprises at least one framework base layer and at least one framework functional layer, the framework functional layer comprises a functional layer liquid outlet ring protruding from the framework base layer, and the functional layer liquid outlet ring supports and seals the liquid outlet elastic bulge. The utility model aims to enhance the filtering stability and the filtering efficiency and improve the filtering sealing performance under the same clamping effect.

Description

High sealed filtering membrane package

Technical Field

The utility model belongs to the technical field of filtration, and particularly relates to a high-sealing filter membrane package.

Background

Filter membrane packages are a common tangential flow filtration unit, such as chinese patent publication No.: CN217092460U is typically stacked from one or more membrane package units, each membrane package unit being designed from a multi-layer membrane structure. Through the design of the membrane layer structure and the internal flow channel, the dead-end filtering function and the tangential flow filtering function of the filtering membrane package can be selectively realized. The self sealing of the filtering membrane bag is realized under the external clamping effect, but along with the continuous improvement of the requirements of the operation process and the continuous widening of the application field, the requirements on the sealing performance of the filtering membrane bag are continuously improved. At present, the tightness of the filtering membrane bag is mainly improved through the improvement of the clamping effect, but along with the continuous improvement of the clamping effect, the filtering membrane is contained and is easy to deform, and the mechanical stability of the filtering membrane bag is damaged, so that the filtering effect of the filtering membrane bag is difficult to ensure.

Disclosure of Invention

The utility model provides a high-sealing filter membrane package, which enhances the filtering stability and filtering efficiency and improves the filtering sealing performance under the same clamping effect.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a high sealed filtration membrane package, includes at least one membrane package unit, membrane package unit includes feed liquor passageway layer, filtration membrane layer and infiltration liquid passageway layer, filtration membrane layer sets up respectively in the both sides on infiltration liquid passageway layer, the feed liquor passageway layer sets up in the outside on filtration membrane layer, membrane package unit all is equipped with inlet, liquid outlet and the gas vent that the position corresponds at feed liquor passageway layer, filtration membrane layer and infiltration liquid passageway layer, the liquid outlet on feed liquor passageway layer is provided with out liquid elasticity arch, membrane package unit is equipped with the skeleton layer at the upstream side and/or the downstream side on filtration membrane layer, the skeleton layer includes at least one deck skeleton basic unit and at least one deck skeleton functional layer, the skeleton functional layer is including protruding in the functional layer play liquid circle of skeleton basic unit, the functional layer play liquid circle supports sealedly to going out liquid elasticity arch. Through set up the framework layer in the membrane package unit, improve the whole mechanical strength of membrane package unit and filtration membrane package, the framework layer forms the filtration cavity with filtration membrane layer cooperation, improves filtration efficiency and filtration stability, plays support and guard action to filtration membrane layer simultaneously, avoids filtration membrane layer to take place to damage. The skeleton functional layer is protruding in the skeleton basic unit, goes out liquid elastic bulge and restricts the protruding deformation direction of liquid elastic bulge, goes out liquid elastic bulge under the same outside centre gripping and receives bigger clamping force effect in department, goes out liquid elastic bulge and has bigger axial deformation to improve the leakproofness of liquid outlet position, be favorable to filtering membrane package high sealing performance under the low centre gripping effect.

Preferably, the skeleton base layer comprises an outer frame and a base layer grid arranged in the outer frame, and the base layer grid is provided with a base layer liquid outlet ring coaxially arranged with the functional layer liquid outlet ring. The basic unit grid structure of framework layer can effectively support filtering membrane package inner structure, prevents that filtering membrane package from issuing deformation in transportation, storage, use etc. in-process, and the basic unit goes out liquid circle on the basic unit grid and corresponds with the functional layer and goes out liquid circle, and the functional layer of being convenient for goes out liquid circle steady support and acts on out liquid elastic bulge.

Preferably, the skeleton functional layer comprises a functional layer liquid inlet ring corresponding to the liquid inlet position and a functional layer exhaust ring corresponding to the exhaust opening position, the liquid inlet of the penetrating liquid channel layer is provided with a liquid inlet elastic bulge corresponding to the functional layer liquid inlet ring position, and the exhaust opening of the penetrating liquid channel layer is provided with an exhaust elastic bulge corresponding to the functional layer exhaust ring position. Like this, feed liquor elasticity arch and exhaust elasticity arch also support through functional layer feed liquor circle and functional layer exhaust circle, provide bigger centre gripping effect at feed liquor elasticity arch and the protruding position of exhaust elasticity, improved the sealed effect of feed liquor mouth and gas vent position.

Preferably, the base layer grid is provided with a base layer liquid inlet ring coaxially arranged with the functional layer liquid inlet ring and a base layer exhaust ring coaxially arranged with the functional layer exhaust ring. The base layer liquid inlet ring and the base layer exhaust ring support and position the corresponding functional layer liquid inlet ring and functional layer exhaust ring, so that the clamping force of the functional layer liquid inlet ring and the functional layer exhaust ring is ensured to be stably acted on the liquid inlet elastic bulge and the exhaust elastic bulge.

Preferably, the inner diameter of the liquid inlet ring of the functional layer is not larger than the inner diameter of the liquid inlet ring of the base layer, the inner diameter of the liquid outlet ring of the functional layer is not larger than the inner diameter of the liquid outlet ring of the base layer, and the inner diameter of the exhaust ring of the functional layer is not larger than the inner diameter of the exhaust ring of the base layer.

Preferably, the skeleton functional layer comprises a functional layer grid, the functional layer liquid outlet ring is arranged on the functional layer grid, and the functional layer grid corresponds to the base layer grid in position. The grid structure of the functional layer of the skeleton functional layer further improves the stability of the filtering membrane package.

Preferably, the skeleton base layer is arranged on one side of the skeleton layer, which is close to the filtering membrane layer, and the skeleton functional layer is arranged on one side of the skeleton layer, which is far away from the filtering membrane layer.

Preferably, the inner diameters of the functional layer liquid inlet ring, the functional layer liquid outlet ring and the functional layer exhaust ring are 1-15mm larger than the corresponding liquid inlet, liquid outlet and exhaust port.

Preferably, the skeleton layer is made of one or more of PE, PP, polyurethane, non-woven fabric and silica gel.

Preferably, the thickness of the skeleton base layer is 20-1000 μm, and the thickness of the skeleton functional layer is 20-1000 μm.

The beneficial effects of the utility model are as follows: (1) The overall mechanical properties of the membrane package unit and the filter membrane package are enhanced through the framework layer, so that the stability of the filter membrane package in the filtering process is improved; (2) The clamping effect of the skeleton functional layer and the corresponding elastic bulge is improved, so that the filter membrane bag can ensure high sealing performance under the low clamping effect; (3) The cooperation of the skeleton functional layer and the skeleton base layer in the skeleton layer ensures that the deformation of the corresponding position of the inner grid is small when the filter membrane bag is clamped, and the stability of the filter membrane bag is maintained while the strong sealing performance is realized under the high clamping effect, so that the filter membrane bag can adapt to more working environments; (4) The framework layer and the filtering membrane layer are matched to form a filtering cavity, so that the filtering efficiency is improved, and the protection effect on the filtering membrane layer is enhanced.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present utility model;

FIG. 2 is a schematic diagram of a skeletal infrastructure of embodiment 1 of the present utility model;

FIG. 3 is a schematic diagram of the skeleton functional layer structure of embodiment 1 of the present utility model;

FIG. 4 is a flow path structure diagram of embodiment 1 of the present utility model;

FIG. 5 is a schematic structural view of embodiment 2 of the present utility model;

FIG. 6 is a schematic structural view of embodiment 3 of the present utility model;

fig. 7 is a schematic structural view of embodiment 4 of the present utility model.

In the figure: the liquid inlet channel layer 1, the liquid outlet elastic bulge 1a, the framework layer 2, the framework functional layer 21, the functional layer liquid inlet ring 21a, the functional layer grid 21b, the functional layer liquid outlet ring 21c, the functional layer exhaust ring 21d, the framework base layer 22, the base layer liquid inlet ring 22a, the base layer liquid outlet ring 22b, the base layer exhaust ring 22c, the base layer grid 22d, the outer frame 22e, the filtering membrane layer 3, the permeate channel layer 4, the liquid inlet elastic bulge 4a, the exhaust elastic bulge 4b, the liquid outlet 5, the exhaust port 6 and the liquid inlet 7.

Detailed Description

The utility model is further described below with reference to the drawings and detailed description.

Example 1

In the embodiment shown in fig. 1, a high-sealing filtering membrane package comprises at least one membrane package unit, wherein the membrane package unit comprises a liquid inlet channel layer 1, a filtering membrane layer 3 and a penetrating liquid channel layer 4, the penetrating liquid channel layer 4 is positioned in the middle of the membrane package unit, the filtering membrane layers 3 are respectively arranged on two sides of the penetrating liquid channel layer 4, and the liquid inlet channel layer 1 is arranged on the outer side of the filtering membrane layer 3. The membrane package unit is equipped with inlet 7, liquid outlet 5 and gas vent 6 that the position corresponds at inlet channel layer 1, filtration membrane layer 3 and infiltration liquid channel layer 4, and gas vent 6 diameter is less than inlet 7, liquid outlet 5. As shown in fig. 4, the liquid inlet 7, the liquid outlet 5 and the air outlet 6 of each layer structure form a liquid inlet channel, a liquid outlet channel and an air outlet channel in the thickness direction of the film package unit. The liquid inlet channel layer 1 can be of a screen structure, so that liquid inlet materials can be uniformly distributed, and the materials can uniformly enter the upstream of the filtering membrane layer 3. The permeate channel layer 4 may be selected from plastic members having a flow channel structure for collecting permeate passing through the filtering membrane layer 3. The filtering membrane layer 3 can be made of polyethersulfone material, and has a filtering effect on the liquid inlet material.

Referring to fig. 2 and 3, the membrane-wrapping unit is provided with a skeleton layer 2 on the upstream side of the filtering membrane layer 3, the skeleton layer 2 includes a skeleton base layer 22 and a skeleton functional layer 21, the skeleton layer 2 is made of PE, the thickness of the skeleton layer 2 is 500 μm, the thickness of the skeleton base layer 22 is 300 μm, and the thickness of the skeleton functional layer 21 is 200 μm. The skeleton basic unit 22 sets up in skeleton layer 2 and is close to the one side of filtration membrane layer 3, and skeleton functional layer 21 sets up in skeleton layer 2 and is kept away from the one side of filtration membrane layer 3. The skeleton base layer 22 comprises an outer frame 22e and a base layer grid 22d arranged in the outer frame 22e, wherein the base layer grids 22d are arranged at intervals in parallel, a base layer liquid outlet ring 22b, a base layer liquid inlet ring 22a and a base layer exhaust ring 22c are arranged on the base layer grid 22d, the base layer liquid outlet ring 22b corresponds to the position of the liquid outlet 5, the base layer liquid inlet ring 22a corresponds to the position of the liquid inlet 7, and the base layer exhaust ring 22c corresponds to the position of the exhaust port 6.

As shown in fig. 3, the skeleton functional layer 21 includes a functional layer liquid outlet ring 21c, a functional layer liquid inlet ring 21a and a functional layer exhaust ring 21d, and positions of the functional layer liquid outlet ring 21c, the functional layer liquid inlet ring 21a and the functional layer exhaust ring 21d are in one-to-one correspondence with the liquid outlet 5, the liquid inlet 7 and the exhaust port 6, and inner diameters of the functional layer liquid inlet ring 21a, the functional layer liquid outlet ring 21c and the functional layer exhaust ring 21d are larger than the corresponding liquid inlet 7, liquid outlet 5 and exhaust port 6 by 5mm. The functional layer liquid outlet ring 21c and the base layer liquid outlet ring 22b are coaxially arranged, the functional layer liquid inlet ring 21a and the base layer liquid inlet ring 22a are coaxially arranged, and the functional layer exhaust ring 21d and the base layer exhaust ring 22c are coaxially arranged. The inner diameter of the functional layer liquid inlet ring 21a is not larger than that of the base layer liquid inlet ring 22a, the inner diameter of the functional layer liquid outlet ring 21c is not larger than that of the base layer liquid outlet ring 22b, and the inner diameter of the functional layer exhaust ring 21d is not larger than that of the base layer exhaust ring 22 c. The skeleton functional layer 21 further includes a functional layer grid 21b, a plurality of functional layer grids 21b are arranged in parallel, and a functional layer liquid outlet ring 21c, a functional layer liquid inlet ring 21a and a functional layer exhaust ring 21d are all arranged on the functional layer grid 21b, and the functional layer grid 21b corresponds to the position of the base layer grid 22 d. After the skeleton base layer 22 and the skeleton functional layer 21 are compressed, the functional layer liquid outlet ring 21c, the functional layer liquid inlet ring 21a and the functional layer exhaust ring 21d of the skeleton functional layer 21 protrude out of the surface of the skeleton base layer 22.

As shown in fig. 1, the liquid outlet of the liquid inlet channel layer 1 is provided with a liquid outlet elastic bulge 1a, and the liquid outlet elastic bulge 1a seals the liquid inlet channel layer 1 and the liquid outlet, so as to prevent the permeate from flowing back and prevent the feed liquor from directly entering the permeate. The inlet of the permeate channel layer 4 is provided with a liquid inlet elastic bulge 4a, and the inlet and the permeate channel layer 4 are sealed to prevent the liquid inlet material from directly entering the permeate channel layer 4 to form a short circuit. The vent of the permeate channel layer 4 is provided with a vent elastic projection 4b, which can seal the vent to prevent the permeate from being contaminated by the feed liquid material. The height of the liquid outlet elastic bulge 1a, the liquid inlet elastic bulge 4a and the air outlet elastic bulge 4b is 10-800 mu m higher than that of the corresponding film layer, and the material is one or more of polyurethane, silica gel, silicon rubber and rubber.

In combination with the illustration of fig. 4, the framework layer 2 can effectively support inside the membrane package unit, thereby improving the mechanical stability of the filter membrane package and preventing unnecessary damage during transportation, installation and use. The framework layer 2 is arranged at the upstream of the filtering membrane layer 3, separates the liquid inlet channel layer 1 from the filtering membrane layer 3, avoids the direct contact between the liquid inlet channel layer 1 and the filtering membrane layer 3, and prevents the deformation of the liquid inlet channel layer 1 under the external clamping effect to damage the filtering membrane layer 3. The grid structure formed by the base layer grid 22d and the functional layer grid 21b provides a filtering cavity for the filtering membrane package, so that the filtering efficiency and the effective filtering area are effectively improved. When the filter membrane package is subjected to external clamping action, as the functional layer liquid outlet ring 21c, the functional layer liquid inlet ring 21a and the functional layer exhaust ring 21d are protruded on the surface of the skeleton base layer 22, the positions of the liquid outlet elastic bulge 1a, the liquid inlet elastic bulge 4a and the exhaust elastic bulge 4b are subjected to more clamping action, so that the filter membrane package has more axial deformation, and higher tightness is provided for the filter membrane package. Therefore, through the synergistic effect of the skeleton functional layer 21 and the skeleton base layer 22 in the skeleton layer 2, when the filter membrane package is clamped, the deformation of the outer frame 22e is larger, the deformation of the corresponding positions of the inner base layer grids 22d and the functional layer grids 21b is smaller, the effect of strong sealing performance is formed under the external high clamping effect, and the high sealing performance can be maintained under the low clamping effect, so that the filter membrane package has higher adaptability to different working environments.

Example 2

Example 2 differs from example 1 in that the membrane pack unit is provided with a framework layer 2 on the upstream side and downstream side of the filtration membrane layer 3, i.e., the framework layer 2 is provided between the filtration membrane layer 3 and the feed-liquid channel layer 1 and between the filtration membrane layer 3 and the permeate channel layer 4, as shown in fig. 5. The thickness of the backbone layer 2 is 300 μm, which comprises a backbone base layer 22 with a thickness of 150 μm and a backbone functional layer 21 with a thickness of 150 μm. The skeleton base layer 22 is disposed on one side of the skeleton layer 2 close to the filtering membrane layer 3, the skeleton functional layer 21 is disposed on one side of the skeleton layer 2 far away from the filtering membrane layer 3, and the structures of the skeleton base layer 22 and the skeleton functional layer 21 are kept consistent with those of embodiment 1.

In the filtering performance, by arranging the framework layers 2 on the upstream and downstream of the filtering membrane layer 3, the contact between the filtering membrane layer 3 and the liquid inlet channel layer 1 and the contact between the filtering membrane layer 3 and the penetrating liquid channel layer 4 can be effectively avoided, and the damage to the filtering membrane layer 3 caused by deformation of the liquid inlet channel layer 1 or the penetrating liquid channel layer 4 under the external clamping action is prevented; the filtering cavities are formed in the two sides of the filtering membrane layer 3, so that the filtering efficiency of the liquid inlet materials is improved, the impact of the severe liquid inlet materials on the filtering membrane package is reduced, the buffering stability is provided for the penetrating fluid, and the materials are prevented from being denatured due to larger tangential force.

Example 3

Embodiment 3 is different from embodiment 1 in that, as shown in fig. 6, the skeleton functional layer 21 includes a functional layer liquid inlet ring 21a, a functional layer liquid outlet ring 21c, and a functional layer exhaust ring 21d. The dimensions of the functional layer liquid inlet ring 21a, the functional layer liquid outlet ring 21c and the functional layer exhaust ring 21d are consistent with the dimensions of the corresponding base layer liquid inlet ring 22a, base layer liquid outlet ring 22b and base layer exhaust ring 22c, the structure of the skeleton functional layer 21 of the embodiment is simpler than that of the embodiment 1, and the skeleton functional layer 21 is suitable for the use environment with lower requirements on the filtering membrane package strength, but still has stronger supporting and sealing effects on the liquid inlet 7, the liquid outlet 5 and the exhaust port 6, and can effectively reduce the production and manufacturing cost.

Example 4

Embodiment 3 differs from embodiment 1 in that, as shown in fig. 7, the membrane package unit is in a strip shape, and the membrane package unit is provided with a liquid inlet 7, a gas outlet 6 and two liquid outlets 5 corresponding to each other in positions in the liquid inlet channel layer 1, the filtering membrane layer 3 and the permeate channel layer 4, the diameters of the liquid outlets 5 are smaller than those of the liquid inlet 7 and the gas outlet 6, one liquid outlet is located at the side of the liquid inlet 7, and the other liquid outlet is located at the side of the gas outlet 6. The upstream of the filtering membrane layer 3 is provided with a framework layer 2 made of non-woven fabric, the thickness of the framework layer 2 is 300 mu m, the thickness of the framework base layer 22 is 200 mu m, and the thickness of the framework functional layer 21 is 100 mu m. The skeleton base layer 22 is provided with a base layer liquid inlet ring 22a, a base layer exhaust ring 22c and two base layer liquid outlet rings 22b, the inner diameter of the base layer liquid outlet ring 22b is 2mm larger than the corresponding liquid outlet 5, and the inner diameters of the base layer liquid inlet ring 22a and the base layer exhaust ring 22c are 2mm larger than the corresponding liquid inlet 7 and the corresponding air outlet 6. One of the base layer liquid outlet ring 22b and the base layer liquid inlet ring 22a is arranged on one base layer grid, and the other base layer liquid outlet ring 22b and the base layer exhaust ring 22c are arranged on the other base layer grid. Correspondingly, the skeleton functional layer 21 comprises a functional layer liquid inlet ring 21a, a functional layer exhaust ring 21d and two functional layer liquid outlet rings 21c, wherein one functional layer liquid outlet ring and the functional layer liquid inlet ring 21a are arranged on one functional layer grid, and the other functional layer liquid outlet ring and the functional layer exhaust ring 21d are arranged on the other functional layer grid.

The liquid outlet of the liquid inlet channel layer 1 is provided with liquid outlet elastic bulges 1a, and the height of the bulges is 50 mu m. The inlet of the permeate channel layer 4 is provided with a liquid inlet elastic projection 4a, the outlet of the permeate channel layer 4 is provided with an outlet elastic projection 4b, and the projection heights of the liquid inlet elastic projection 4a and the outlet elastic projection 4b are 50 μm.

When the filtering membrane package is subjected to external clamping action, the framework layer 2 limits the radial deformation of each elastic bulge, and enables each elastic bulge to generate more axial deformation, so that higher tightness is provided for the filtering membrane package. Under the synergistic effect of the skeleton functional layer 21 and the skeleton base layer 22, the deformation of the outer frame 22e of the filter membrane bag is large under the clamping effect, and the deformation of the inner functional layer liquid outlet ring 21c, the functional layer liquid inlet ring 21a and the functional layer exhaust ring 21d is small, so that the high sealing performance can be maintained under the low clamping effect, and the working field of the filter membrane bag is widened.

Claims (10)

1. The utility model provides a high sealed filtration membrane package, includes at least one membrane package unit, membrane package unit includes feed liquor passageway layer (1), filtration membrane layer (3) and permeate passageway layer (4), filtration membrane layer (3) set up respectively in the both sides of permeate passageway layer (4), feed liquor passageway layer (1) set up in the outside of filtration membrane layer (3), membrane package unit all is equipped with inlet (7), liquid outlet (5) and the gas vent that the position corresponds in feed liquor passageway layer (1), filtration membrane layer (3) and permeate passageway layer (4), characterized by, liquid outlet (5) of feed liquor passageway layer (1) are provided with out liquid elastic bulge (1 a), membrane package unit is equipped with skeleton layer (2) in the upstream side and/or the downstream side of filtration membrane layer (3), skeleton layer (2) include at least one deck skeleton basic unit (22) and at least one deck skeleton functional layer (21), skeleton functional layer (21) are including protruding in the functional layer (21 c) of skeleton (22), the elastic bulge (21 c) carries out liquid elastic bulge (1 c) to liquid outlet seal.

2. A highly sealed filtration membrane pack according to claim 1, wherein the skeletal substrate (22) comprises an outer rim (22 e) and a substrate grid (22 d) disposed inside the outer rim (22 e), and the substrate grid (22 d) is provided with a substrate liquid outlet ring (22 b) coaxially disposed with the functional layer liquid outlet ring (21 c).

3. A highly sealed filtration membrane pack according to claim 2, wherein the skeleton functional layer (21) comprises a functional layer liquid inlet ring (21 a) corresponding to the position of the liquid inlet (7) and a functional layer air outlet ring (21 d) corresponding to the position of the air outlet, the liquid inlet of the permeate channel layer (4) is provided with a liquid inlet elastic bulge (4 a) corresponding to the position of the functional layer liquid inlet ring (21 a), and the air outlet of the permeate channel layer (4) is provided with an air outlet elastic bulge (4 b) corresponding to the position of the functional layer air outlet ring (21 d).

4. A highly sealed filter membrane pack according to claim 3, wherein the base layer grating (22 d) is provided with base layer intake rings (22 a) coaxially arranged with the functional layer intake rings (21 a) and base layer exhaust rings (22 c) coaxially arranged with the functional layer exhaust rings (21 d).

5. The highly sealed filtration membrane pack of claim 4 wherein the inner diameter of the functional layer feed ring (21 a) is no greater than the inner diameter of the base layer feed ring (22 a), the inner diameter of the functional layer drain ring (21 c) is no greater than the inner diameter of the base layer drain ring (22 b), and the inner diameter of the functional layer drain ring (21 d) is no greater than the inner diameter of the base layer drain ring (22 c).

6. A highly sealed filtration membrane pack according to claim 2, wherein the skeletal functional layer (21) comprises a functional layer grid (21 b), the functional layer drain (21 c) being disposed on the functional layer grid (21 b), the functional layer grid (21 b) corresponding to the position of the base layer grid (22 d).

7. A highly sealed filter membrane pack according to claim 1 or 2, wherein the skeleton base layer (22) is disposed on a side of the skeleton layer (2) close to the filter membrane layer (3), and the skeleton functional layer (21) is disposed on a side of the skeleton layer (2) away from the filter membrane layer (3).

8. The high-sealing filter membrane pack according to claim 4, wherein the inner diameters of the functional layer liquid inlet ring (21 a), the functional layer liquid outlet ring (21 c) and the functional layer exhaust ring (21 d) are 1-15mm larger than the corresponding liquid inlet (7), liquid outlet (5) and exhaust port.

9. A highly sealed filter membrane pack according to claim 1 or 2, wherein the carcass layer (2) is made of one of PE, PP, polyurethane, non-woven and silica gel.

10. A highly sealed filtration membrane pack according to claim 1 or 2, wherein the thickness of the skeletal base layer (22) is 20-1000 μm and the thickness of the skeletal functional layer (21) is 20-1000 μm.