CN115845623A

CN115845623A - Organic gas permeation filtering membrane

Info

Publication number: CN115845623A
Application number: CN202211494495.9A
Authority: CN
Inventors: 韩安庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-03-28

Abstract

The invention discloses an organic gas permeation filter membrane, which comprises a shell and a central tube, wherein the shell is of a hollow cylindrical structure, the central tube coaxially penetrates through the interior of the shell, and an air inlet end cover and an air outlet end cover for supporting the central tube are respectively arranged at two ends of the shell; the spiral winding of center tube outside is provided with multiunit membrane bag, the membrane bag is followed intake end cover one side to exhaust end cover one side coiling tapering enlarges gradually, and the multiunit the membrane bag is followed the nested distribution in proper order of center tube length direction, the center tube outside is provided with multiunit gas collection hole. Has the advantages that: according to the invention, the spiral baffle plate is used for conical winding instead of the winding structure of the existing membrane bag, the length direction of which is vertical to the axis of the central tube, so that the gas filtration is realized by sequentially nesting and winding a plurality of groups of membrane bags at the inner sides of the baffle plate to fill the gas separation channel, the problem that the existing membrane bag is easily extruded and damaged by airflow when being wound along the tangential direction of the outer circumference of the central tube is improved, and the service life of the equipment is prolonged.

Description

Organic gas permeation filtering membrane

Technical Field

The invention relates to the field of organic gas filtration, in particular to an organic gas permeation filtration membrane.

Background

The basic principle of gas membrane separation is that the gas partial pressure difference on two sides of the membrane is used as a driving force, different gases permeate through the membrane material at different rates according to the selectivity of the membrane to different permeating gases, so that the purpose of separating and purifying certain gases is achieved, and the diffusion modes of the gases passing through the membrane are different for membranes with different structures, so that compared with the traditional adsorption freezing and condensation separation, the gas membrane separation technology has the advantages of energy conservation, high efficiency, simplicity in operation, no secondary pollution, wider application range and the like, and is widely applied to the waste gas treatment in the petrochemical industry, the oil gas recovery of oil storage and transportation and other various chemical industries. However, in the currently used gas permeation membrane separators, the separation task can be completed only by communicating the separation membrane with the air pump pipeline when the membranes on the two sides are in a pressure difference state, so that the filtering membrane is extruded by the gas flowing to one end of the pipeline in the tubular shell for a long time, the whole filtering membrane has a shrinkage problem, and the filtering membrane is easily damaged or even loses the filtering capability under the action of pressure drop in the flowing direction.

Disclosure of Invention

The present invention aims to solve the above problems and provide an organic gas permeation filtration membrane, wherein a winding structure of the existing membrane bag in the length direction perpendicular to the axis of the central tube is replaced by conical winding along a spiral baffle plate, so as to improve the problem that the existing membrane bag is easily damaged by air flow extrusion when being wound along the tangential direction of the outer circumference of the central tube, and prolong the service life of the equipment, as will be described in detail below.

In order to realize the purpose, the invention provides the following technical scheme:

the invention provides an organic gas permeation filtering membrane which comprises a shell and a central tube, wherein the shell is of a hollow cylindrical structure, the central tube coaxially penetrates through the interior of the shell, and an air inlet end cover and an air outlet end cover for supporting the central tube are respectively arranged at two ends of the shell;

the spiral winding of center tube outside is provided with multiunit membrane bag, the membrane bag is followed inlet end cover one side to exhaust end cover one side coiling tapering enlarges gradually, and multiunit the membrane bag is followed center tube length direction is nested the distribution in proper order, the center tube outside is provided with multiunit gas collection hole, just the membrane bag is close to inlet end cover one side is provided with the sack that bonds and is fixed in the center tube outside and communicates with the gas collection hole.

Adopt above-mentioned organic gas infiltration filtration membrane, gas that will need to filter is in the gas separation passageway between leading-in casing of inlet port along the inlet end cover and the center tube, simultaneously with the outer tip intercommunication aspiration pump of purge tube, with the inside suction of the membrane bag with purge tube and the connected state be negative pressure state, the gas mixture that gets into in the heliciform gas separation passageway this moment receives the negative pressure effect and filters the screening by the membrane bag, the purge gas of accessible membrane bag gets into the center tube along sack and gas concentration hole, and discharge to the aspiration pump position along pipe and purge tube in proper order, the gas that can't pass through the membrane bag receives the propulsive effect of the inside gas of continuous input gas separation passageway, with the foreign gas that can't see through the membrane bag outwards discharges along fixed orifices and activity hole in proper order in the process of continuing to filter, accomplish the gas filtration separation process.

Preferably, the inner side of the shell abuts against the outer side of the membrane bag, the shell and the air inlet end cover are integrally formed, the outer diameter of the air inlet end cover is larger than that of the shell, and a plurality of groups of flange connecting holes are formed in the air inlet end cover on the outer side of the shell in an encircling mode.

Preferably, a plurality of groups of air inlets distributed in a surrounding manner are transversely arranged in the middle of the air inlet end cover in a penetrating manner, a sealing cover for sealing the port of the central pipe is arranged on the inner side of the air inlet end cover, the sealing cover comprises a stud which extends into the inner side of the port of the central pipe and is in threaded fit with the central pipe, and a cover plate which is abutted against the inner side of the air inlet end cover is fixed at one end of the stud which penetrates out of the central pipe.

Preferably, the film bag is a hollow bag body with three sides closed and one side opened to form a bag opening, the film bag is of an envelope-shaped structure, the film bag is of a porous film structure, and an air barrier net for supporting the film bag in an expanded state is arranged in the film bag.

Preferably, the air barrier net is fixed in the membrane bag and follows the membrane bag to wind and distribute along the central tube, a spirally extending separation blade is fixed on the outer side of the central tube, the membrane bag is arranged on the inner side of the separation blade to guide the membrane bag to spirally distribute through the separation blade, and a plurality of snakelike extending guide strips are arranged on the outer surface of the air barrier net.

Preferably, the outer sides of the baffle plates are abutted against the inner side of the shell, a cavity between the central tube and the shell is separated by the baffle plates to form a spirally extending gas separation channel, and the plurality of groups of membrane bags are uniformly distributed along the gas separation channel.

Preferably, a communicating piece for fixing the central pipe is arranged on the inner side of the exhaust end cover, the communicating piece comprises a guide pipe extending into the inner side of the port of the central pipe, the guide pipe is in threaded fit with the central pipe, and a sealing ring is fixed on the outer side of the middle part of the guide pipe.

Preferably, the other end of the guide pipe is fixed in the middle of the exhaust end cover, the end face of the sealing ring is tightly abutted to the end part of the central pipe, and the outer side of the sealing ring is flush with the outer circumference of the guide pipe.

Preferably, a dismounting sleeve is fixed on one side, close to the shell, of the exhaust end cover, extends to the outer side of the shell and is in threaded fit with the shell, a purification pipe is transversely fixed in the middle of the outer side of the exhaust end cover, the purification pipe is communicated with the central pipe through the guide pipe, and a plurality of groups of flange connecting holes are formed in the outer circumference of the exhaust end cover in a surrounding mode.

Preferably, the outer side of the end part of the purification tube is fixedly provided with a limiting ring, a plurality of groups of fixed holes are formed in the exhaust end cover in a surrounding mode around the purification tube, a movable disc is sleeved on the outer side of the purification tube and in clearance fit with the purification tube, a plurality of groups of movable discs are arranged on the movable discs in a surrounding mode and matched with the fixed holes to communicate with the movable holes of the gas separation channel, and a spring which pushes the movable disc to tightly abut against the exhaust end cover is sleeved on the outer portion of the purification tube, close to one side of the shell, of the limiting ring.

Has the advantages that: the invention replaces the winding structure of the existing membrane bag in the length direction vertical to the axis of the central tube with the spiral baffle plate for conical winding, thereby realizing gas filtration by a plurality of groups of membrane bags which are sequentially nested and wound on the inner sides of the baffle plates to fill the gas separation channel;

the spiral gas separation channel replaces a linear gas separation channel of the existing separator, so that the flowing distance of the organic gas in the shell is increased, and the separation effect is further improved;

meanwhile, the opening and closing states of the air outlet of the air separation channel are adjustable, so that the air pressure between the shell and the central tube is increased by closing the air outlet end cover in the filtering process, and the filtering speed is increased.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view structural diagram of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view of the structure of the present invention at A-A;

FIG. 3 is a perspective view of the present invention;

FIG. 4 is a perspective sectional view of the present invention;

FIG. 5 is a schematic partial structural split view of the present invention;

FIG. 6 is a schematic diagram of the overall structure of the present invention, shown disassembled;

FIG. 7 is a schematic view of the rolled configuration of the film bag of the present invention;

FIG. 8 is a schematic view of the gas barrier net of the present invention in an unfolded and flattened state;

FIG. 9 is a schematic view of the exhaust end cap of the present invention shown disassembled.

The reference numerals are explained below:

1. a housing; 2. a central tube; 201. a gas collection hole; 202. a baffle plate; 3. film bag; 301. a bag opening; 302. an air barrier net; 303. a guide strip; 4. a sealing cover; 401. a stud; 402. a cover plate; 5. an air inlet end cover; 501. an air inlet; 6. a communicating member; 601. a conduit; 602. a seal ring; 7. an exhaust end cap; 701. a purge tube; 702. a spring; 703. a movable tray; 704. a limiting ring; 705. a fixing hole; 706. a movable hole; 707. and (4) side grooves.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1 to 9, the present invention provides an organic gas permeation filtration membrane, which includes a housing 1 and a central tube 2, wherein the housing 1 is a hollow cylindrical structure, the central tube 2 coaxially penetrates through the housing 1, and an air inlet end cap 5 and an air outlet end cap 7 for supporting the central tube 2 are respectively disposed at two ends of the housing 1. 2 outside spiral winding of center tube is provided with multiunit membrane bag 3, membrane bag 3 is used for filtering the different components in the organic gas, in order to realize the organic gas separation purification of multiple gas mixture, membrane bag 3 is from 5 one sides of end cover of admitting air to 7 one sides of end cover of exhaust and is convoluteed the tapering and expand gradually, and multiunit membrane bag 3 is along 2 length direction nested distributions in proper order of center tube, the 2 outsides of center tube are provided with multiunit gas collection hole 201, and membrane bag 3 is close to 5 one sides of end cover of admitting air and is provided with the bonding and is fixed in the 2 outsides of center tube and with the sack 301 of gas collection hole 201 intercommunication, guarantee that the gas that sees through membrane bag 3 can follow sack 301 and gas collection hole 201 and carry out the completion separation in the center tube 2.

Referring to fig. 6-8 specifically, the membrane bag 3 is a hollow bag body with three closed sides and one open side forming a bag opening 301, the membrane bag 3 is of an envelope-shaped structure, and the membrane bag 3 is of a porous membrane structure, the membrane bag 3 is of a polymer membrane material, and the membrane bag 3 material includes any one of Polydimethylsiloxane (PLMS), polysulfone (PSE), cellulose acetate (EA), and Polycarbonate (PC), different organic gases can be filtered out by selecting different membrane bag 3 materials, so as to realize the separation process of different products, an air barrier net 302 supporting the membrane bag 3 in a stretched-open state is arranged inside the membrane bag 3, the air barrier net 302 is fixed inside the membrane bag 3 and is wound and distributed along a central tube 2 along with the membrane bag 3, a spirally-extending barrier sheet 202 is fixed outside the central tube 2, the membrane bag 3 is arranged inside the barrier sheet 202 so as to guide the membrane bag 3 to be spirally distributed through the barrier sheet 202, a plurality of guide strips 303 extending in a serpentine shape are arranged on the outer surface of the barrier sheet 302, so as to be stretched inside the membrane bag 3 by the guide strips 303 to stretch the inner side of the barrier sheet 202, and the barrier sheet 2 is arranged in a plurality of a flow channel of the central tube 1, and is arranged in a plurality of the separation chamber 1, which the separation channel is formed by abutting against the flow channel of the central tube 2, and abutting against the separation bag 3, and abutting against the flow channel of the central tube 1.

As an optional implementation manner, the inner side of the shell 1 abuts against the outer side of the membrane bag 3, the shell 1 and the air inlet end cover 5 are integrally formed, the outer diameter of the air inlet end cover 5 is larger than that of the shell 1, a plurality of groups of flange connecting holes are annularly arranged on the air inlet end cover 5 on the outer side of the shell 1, so that the air inlet end cover 5 is communicated with an external air supply pipeline by penetrating bolts into the flange connecting holes, a plurality of groups of annularly distributed air inlet holes 501 transversely penetrate through the middle part of the air inlet end cover 5, a sealing cover 4 for sealing a port of the central tube 2 is arranged on the inner side of the air inlet end cover 5, the sealing cover 4 comprises a stud 401 extending into the inner side of the port of the central tube 2 and in threaded fit with the central tube 2, a cover plate 402 abutting against the inner side of the air inlet end cover 5 is fixed at one end of the central tube 2 penetrating through the central tube 2, and one end of the central tube 2 close to the air inlet end cover 5 is sealed by the sealing cover 4;

referring to fig. 9, a connecting member 6 for fixing the central tube 2 is disposed inside the exhaust end cover 7, the connecting member 6 includes a conduit 601 extending into the inner side of the port of the central tube 2, the conduit 601 is in threaded engagement with the central tube 2, a seal ring 602 is fixed outside the middle portion of the conduit 601, the other end of the conduit 601 is fixed in the middle portion of the exhaust end cover 7, the end surface of the seal ring 602 abuts against the end portion of the central tube 2, and the outside of the seal ring 602 is flush with the outer circumferential side of the conduit 601, a dismounting sleeve is fixed on the side of the exhaust end cover 7 close to the housing 1, the dismounting sleeve extends outside the housing 1 and is in threaded engagement with the housing 1 to ensure that the exhaust end cover 7 is detachably fixed to the housing 1, a purifying tube 701 is transversely fixed in the middle portion outside the exhaust end cover 7, the purifying tube 701 is communicated with the central tube 2 through the conduit 601, a plurality of flange connecting holes are circumferentially disposed on the outer circumferential side of the exhaust end cover 7 to fixedly communicate the exhaust end cover 7 to the external exhaust gas pipeline by inserting bolts into the flange connecting holes, a limit ring 704 is fixed on the outer side of the end of the purification tube 701, a plurality of groups of fixed holes 705 are arranged on the exhaust end cover 7 around the purification tube 701, a movable disc 703 is sleeved on the outer side of the purification tube 701, the movable disc 703 is in clearance fit with the purification tube 701, a plurality of groups of movable holes 706 matched with the fixed holes 705 to communicate with a gas separation channel are arranged on the movable disc 703 in a surrounding manner, a plurality of groups of side grooves 707 are arranged on the outer circumferential side of the movable disc 703 in a surrounding manner, a spring 702 pushing the movable disc 703 to tightly abut against the exhaust end cover 7 is sleeved on the outer side of the purification tube 701 on one side of the limit ring 704 close to the shell 1, the abutting state of the movable disc 703 against the outer side of the exhaust end cover 7 is kept through the spring 702, and when the overlapping range of the fixed holes 705 and the movable holes 706 is required to be adjusted to further change the exhaust speed of the exhaust end cover 7, the movable disc 703 and the exhaust end cover 7 are separated from the exhaust end cover 7 through the abutting against the side grooves 707, then, the movable disc 703 is rotated to change the position of the movable hole 706, so as to adjust the overlapping range of the movable hole 706 and the fixed hole 705, and then the spring 702 pushes the movable disc 703 to tightly abut against the exhaust end cover 7, so as to complete the size adjustment process of the exhaust channel formed by the fixed hole 705 and the movable hole 706, thereby facilitating the adjustment of the discharge speed of the mixed gas in the gas separation channel, so as to adjust the pressure in the gas separation channel and promote the gas separation and purification.

By adopting the structure, gas to be filtered is guided into the gas separation channel between the shell 1 and the central tube 2 along the gas inlet holes 501 of the gas inlet end cover 5, meanwhile, the outer end part of the purifying tube 701 is communicated with the air pump, so that the purifying tube 701 and the interior of the membrane bag 3 in a communicated state are pumped into a negative pressure state, at the moment, the mixed gas entering the spiral gas separation channel is subjected to the negative pressure effect, the mixed gas is filtered and screened by the membrane bag 3, the purified gas which can pass through the membrane bag 3 enters the central tube 2 along the bag opening 301 and the gas collecting hole 201 and is sequentially discharged to the air pump position along the conduit 601 and the purifying tube 701, the gas which cannot pass through the membrane bag 3 is subjected to the propelling effect of continuously inputting the gas in the gas separation channel, so that the impurity gas which cannot penetrate through the membrane bag 3 is sequentially discharged outwards along the fixed holes 705 and the movable holes 706 in the continuous filtering process, and the gas filtering and separating process is completed.

According to the scheme, the winding structure of the existing membrane bag 3 in the length direction perpendicular to the axis of the central tube 2 is replaced by conical winding along the spiral baffle plate 202, so that a plurality of groups of membrane bags 3 which are sequentially nested and wound to fill the gas separation channel are arranged on the inner sides of the baffle plates 202 to realize gas permeation filtration, and the baffle plate 202 is used as a supporting structure of the membrane bag 3 in the length direction of the central tube 2, so that the problem that the existing membrane bag 3 is easily extruded and damaged by airflow in the tangential winding along the outer circumference of the central tube 2 is solved, and the service life of the equipment is prolonged; and the spiral gas separation channel replaces the linear gas separation channel of the existing separator, so that the flow distance of the organic gas in the shell 1 is increased, and the separation effect is further improved. Meanwhile, the opening and closing states of the air outlet of the gas separation channel are adjustable, so that the air pressure between the shell 1 and the central tube 2 is increased by closing the air outlet end cover 7 in the filtering process, and the permeation filtering speed is improved.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. An organic gas permeation filtration membrane, characterized in that: the air-conditioning system comprises a shell (1) and a central tube (2), wherein the shell (1) is of a hollow cylindrical structure, the central tube (2) coaxially penetrates through the shell (1), and an air inlet end cover (5) and an air outlet end cover (7) for supporting the central tube (2) are respectively arranged at two ends of the shell (1);

center tube (2) outside spiral is rolled up and is provided with multiunit membrane bag (3), membrane bag (3) are followed inlet end cover (5) one side to exhaust end cover (7) one side is rolled up the tapering and is enlarged gradually, and multiunit membrane bag (3) are followed center tube (2) length direction is nested in proper order and is distributed, the center tube (2) outside is provided with multiunit gas collection hole (201), just membrane bag (3) are close to inlet end cover (5) one side is provided with bonding and is fixed in the center tube (2) outside and sack (301) that communicate with gas collection hole (201).

2. An organic gas permeation filtration membrane according to claim 1, wherein: the shell (1) is inboard with the membrane bag (3) outside offsets tightly, shell (1) with air inlet end cover (5) integrated into one piece, air inlet end cover (5) external diameter is greater than shell (1) external diameter, just the shell (1) outside around being provided with multiunit flange joint hole on air inlet end cover (5).

3. An organic gas permeation filtration membrane according to claim 2, wherein: the air inlet cover is characterized in that a plurality of groups of air inlet holes (501) distributed in a surrounding mode are transversely arranged in the middle of the air inlet cover (5), a sealing cover (4) for sealing a port of the central pipe (2) is arranged on the inner side of the air inlet cover (5), the sealing cover (4) comprises a stud (401) which stretches into the port of the central pipe (2) and is in threaded fit with the central pipe (2), and a cover plate (402) which is tightly abutted to the inner side of the air inlet cover (5) is fixed to one end of the central pipe (2) in a penetrating mode.

4. An organic gas permeation filtration membrane according to claim 1 wherein: the membrane bag (3) is a hollow bag body with three sealed sides and one opening forming bag opening (301), the membrane bag (3) is of an envelope-shaped structure, the membrane bag (3) is of a porous membrane structure, and an air separation net (302) supporting the membrane bag (3) to keep an opening state is arranged inside the membrane bag (3).

5. An organic gas permeation filtration membrane according to claim 4, wherein: gas separates net (302) and is fixed in inside and follow this membrane bag (3) of membrane bag (3) are followed center tube (2) are convoluteed and are distributed, the center tube (2) outside is fixed with separation blade (202) that the spiral extends, membrane bag (3) set up in separation blade (202) inboard is in order to guide membrane bag (3) spiral distribution through this separation blade (202), gas separates net (302) surface and is provided with many snakelike guide strips (303) that extend.

6. An organic gas permeation filtration membrane according to claim 5, wherein: the outer side of the baffle plate (202) is tightly abutted to the inner side of the shell (1), the cavity between the central tube (2) and the shell (1) is divided by the baffle plate (202) to form a spirally extending gas separation channel, and the plurality of groups of membrane bags (3) are uniformly distributed along the gas separation channel.

7. An organic gas permeation filtration membrane according to claim 6, wherein: the inner side of the exhaust end cover (7) is provided with a communicating piece (6) for fixing the central pipe (2), the communicating piece (6) comprises a guide pipe (601) extending into the inner side of a port of the central pipe (2), the guide pipe (601) is in threaded fit with the central pipe (2), and a sealing ring (602) is fixed on the outer side of the middle of the guide pipe (601).

8. An organic gas permeation filtration membrane according to claim 7 wherein: the other end of the guide pipe (601) is fixed in the middle of the exhaust end cover (7), the end face of the sealing ring (602) is tightly abutted to the end part of the central pipe (2), and the outer side of the sealing ring (602) is flush with the outer circumferential side of the guide pipe (601).

9. An organic gas permeation filtration membrane according to claim 8, wherein: exhaust end cover (7) are close to casing (1) one side is fixed with the dismouting cover, the dismouting cover extends to the casing (1) outside and with this casing (1) screw-thread fit, exhaust end cover (7) outside middle part transversely is fixed with purge tube (701), purge tube (701) pass through pipe (601) with center tube (2) are linked together, exhaust end cover (7) outer circumference side is provided with multiunit flange connecting hole in the surrounding way.

10. An organic gas permeation filtration membrane according to claim 9 wherein: the utility model discloses a gas separation device, including purifying tube (701), exhaust end cover (7), be provided with multiunit fixed orifices (705) around purifying tube (701) on the purifying tube (701) tip outside is fixed with spacing ring (704), purifying tube (701) outside cover is equipped with movable dish (703), this movable dish (703) with purifying tube (701) clearance fit, just it is provided with the multiunit matching to surround on movable dish (703) fixed orifices (705) are with the intercommunication movable hole (706) of gas separation passageway, just spacing ring (704) are close to casing (1) one side purifying tube (701) outside cover is equipped with spring (702) that top pushing movable dish (703) supported tight exhaust end cover (7).