JPH06246125A - Gas separation membrane module - Google Patents

Abstract

PURPOSE:To provide a spiral gas separation membrane module utilizing a flat gas separation membrane and enhanced in concentration efficiency. CONSTITUTION:A raw gas passage material and a flat gas separation composite membrane obtained by folding back flat gas separation composite membranes 2 with a permeated gas passage material in between are put on each other, and the assembly is wound on a gas supply and discharge pipe 4 to constitute a gas separation membrane module 2. The final end of the winding is positioned at the folded part of the composite membrane, the initial end of the gas separation membrane module 2 is stuck to the pipe 4 so that the raw gas passage 1 communicates with the supply pipe 5 of the pipe 4 and the permeated gas passage 3 with the discharge pipe 6 of the pipe 4, and both ends in the winding direction are sealed so that the raw gas passage and the permeated gas passage are airtightly separated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral type gas separation membrane module formed by winding a flat gas separation composite membrane.

[0002]

2. Description of the Related Art Generally, a spiral type separation membrane module formed by winding a flat membrane is a hole of a hollow tube having a hole in which a permeation fluid channel material forming a permeation fluid channel is sandwiched between flat membrane separation membranes. A flat membrane separation membrane is adhered to the hollow tube so that the permeate fluid flow path communicates with the hollow tube, and is wound around the hollow tube together with the raw material fluid flow path material forming the raw material fluid flow path. Further, both end faces of the flat membrane separation membrane (with the permeating fluid channel material sandwiched) in the winding direction (the direction perpendicular to the hollow tube) are sealed, and the raw material fluid channel is open.

Separation of fluid in a conventional separation membrane module,
Concentration A case of separating and concentrating nitrogen by using a raw material fluid as air will be described. FIG. 6 shows an example of a conventional spiral type gas separation membrane module. Raw material gas supply flow path member 22
When the raw material air is supplied in the direction of the arrow (solid line) to the raw material gas supply passage constituted by, the raw material air flows on the surface of the gas separation composite membrane 21 that preferentially permeates oxygen. At that time, oxygen preferentially permeates the gas separation composite membrane 21 and flows through the permeable gas channel constituted by the permeable gas channel member 23 in the direction of the hollow tube 24 (arrow: broken line). Therefore, the air that has passed through the gas separation membrane and exited from the membrane module is concentrated in nitrogen.

[0004]

Gas separation and concentration by a gas separation membrane is a process in which a raw material gas flows while being in contact with the surface of a gas separation composite membrane. The gas on the surface of the gas separation composite membrane is concentrated, and the longer the gas separation composite membrane is, the more the gas on the surface of the gas separation membrane is concentrated.

However, in the above-mentioned conventional configuration, since the raw material air has a short distance to flow on the surface of the gas separation composite membrane,
There was a problem that air with a high nitrogen concentration could not be obtained.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a gas separation membrane module having a high concentration efficiency.

[0007]

In order to achieve this object, a gas separation membrane module of the present invention is a gas separation composite membrane in the form of a flat film folded with a raw material gas flow path member and a permeation gas flow path material sandwiched therebetween. The gas separation membrane module spirally wound around the air supply / exhaust pipe in which the air supply pipe for supplying the raw material air and the exhaust pipe for exhausting the permeated gas are integrated into one unit. One end serves as a folded portion of the gas separation composite membrane, and one end of the winding start communicates with the raw material gas passage and the supply pipe of the supply / exhaust pipe, and the permeate gas passage communicates with the exhaust pipe of the supply / exhaust pipe. As described above, a gas separation composite membrane is adhered to the air supply / exhaust pipe, and both ends in the winding direction are sealed so as to hermetically separate the raw gas flow passage and the permeation gas flow passage, or a raw gas flow passage material and A flat membrane-like first gas separation composite membrane, a permeating gas channel material, and a flat membrane The second gas separation composite membrane of No. 1 is stacked in the above order to form one unit, and is spirally formed around the air supply / exhaust pipe in which the air supply pipe for supplying the raw material air and the exhaust pipe for exhausting the permeated gas are integrated. In the wound gas separation membrane module, the supply / exhaust pipe is connected at one end of the winding so that the raw material gas flow passage and the supply / exhaust pipe are connected, and the permeated gas flow passage and the supply / exhaust pipe are connected. The first and second gas separation composite membranes are bonded to each other, and the first and second gas separation composite membranes are bonded to one end of the winding end so as to close the permeation gas flow path, and both end portions in the winding direction are It has a structure in which the raw material gas passage and the permeation gas passage are hermetically sealed.

[0008]

With this configuration, since the raw material gas supplied from the air supply pipe flows in the direction in which the raw material gas flow passage is wound, the length of the gas separation composite membrane is increased so that the raw material gas flow passage is It can be lengthened. Since the raw material gas flows while being in contact with the surface of the gas separation composite membrane, the gas that easily permeates the gas separation composite membrane will pass one after another,
The longer the gas separation composite membrane, the more concentrated the gas on the surface of the gas separation membrane.

[0009]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a developed cross-sectional view of the gas separation membrane module of this embodiment, and FIG. 2 is a usage example of this embodiment.

In FIG. 1, reference numeral 1 is a raw material gas channel material,
It is a 5 mesh polyethylene molding net. Reference numeral 2 is a gas separation composite membrane, which has an asymmetric structure in which a gas separation membrane of poly (4-methylpentene 1) is laminated on a porous support, and polydimethylsiloxane is further laminated thereon, and the separation membrane side is the raw material gas flow path material 1 They are arranged so as to face each other and fold back with the permeable gas flow path member 3 made of a 15-mesh polyethylene molding net sandwiched therebetween, and the film end at the beginning of winding is air-tightly bonded to the air supply / exhaust pipe 4. 4 is an air supply / exhaust pipe, and the air supply pipe 5 and the exhaust pipe 6 are
They are arranged parallel to the length direction.

After winding the material of the permeated gas flow channel material 3 from the raw material gas flow channel material 1 in a spiral shape around the supply / exhaust pipe 4 as shown in FIG. The raw material gas flow path and the permeation gas flow path are bonded and sealed by the sealing material 7 so as to be airtightly separated. The gas separation membrane module configured as described above is housed in the pressure vessel 8, and the air supply pipes 5 to 59 are installed.
Air pressurized to ² Pa (5 kgf / cm ² G) 4.2 ×
10 ⁻⁴ m ³ / s (25 l / min) is supplied, and the nitrogen enriched air flow rate obtained from the flow rate control valve 9 is 8.3 × 10 ⁻⁵ m 2.
^When adjusted to ³ / s (5 l / min), the nitrogen concentration was 9
It was 7.7%.

As described above, according to the present embodiment, the raw material gas flow channel material and the flat membrane-like gas separation composite membrane folded back with the permeated gas flow channel material sandwiched are made into one unit, and the raw material air is supplied. A gas separation membrane module in which a supply air supply pipe and an exhaust pipe for exhausting permeated gas are integrally wound around a supply and exhaust pipe in a spiral shape, and one end of the winding end serves as a folded portion of the gas separation composite membrane. Thus, at one end of the winding start, the gas separation composite membrane is attached to the supply / exhaust pipe so that the raw material gas flow passage and the air supply pipe of the supply / exhaust pipe communicate with each other, and the permeation gas flow passage and the exhaust pipe of the supply / exhaust pipe communicate with each other. By bonding and sealing both ends of the winding direction so that the raw material gas passage and the permeating gas passage are airtightly separated, it is possible to increase the distance that the raw material air flows on the surface of the gas separation membrane. A gas separation membrane module with high concentration efficiency can be obtained.

In this embodiment, the raw material gas passage and the flat membrane-like gas separation composite membrane sandwiching the permeation gas passage material are overlapped to form one unit, and only this set is connected around the supply / exhaust pipe. Although the spirally wound structure is used, a plurality of sets may be wound as shown in FIG.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a developed cross-sectional view of the gas separation membrane module of this embodiment.

In FIG. 4, 1 is a raw material gas flow path member, 3 is a permeation gas flow path member, 4 is an air supply / exhaust pipe in which an air supply pipe 5 and an exhaust pipe 6 are arranged in parallel in the longitudinal direction. The configuration is the same as in Example 1. 2-1 and 2-2 are gas separation composite membranes, which also have the same structure as the gas separation composite membrane 2 of Example 1, and are arranged so that the separation membrane side faces the raw material gas flow path member 1. The one end of the winding start is airtightly bonded to the air supply / exhaust pipe 4. After spirally winding the material of the permeating gas flow channel material 3 from the raw material gas flow channel material 1 above, the gas separation composite membranes 2-1 and 2-2 are formed at one end of the winding end. The film sealing material 2-3 is airtightly adhered, and both ends in the winding direction are adhesively sealed by the sealing material 7 so as to airtightly separate the raw material gas passage and the permeation gas passage as shown in FIG. Stop.

The gas separation membrane module configured as described above is housed in the pressure vessel 8 and is connected to the air supply pipe 5 at 592 Pa.
Air pressurized to (5 kgf / cm ² G) 4.2 × 10 ^-4
m ³ / s (25 l / min) is supplied, and the nitrogen-concentrated air flow rate obtained from the flow rate control valve 9 is 8.3 × 10 ⁻⁵ m ³ / s.
When adjusted to (5 l / min), the nitrogen concentration is 97.5.
%Met.

As described above, according to this embodiment, the raw material gas flow channel material, the flat membrane-like first gas separation composite membrane, the permeation gas flow channel material, and the flat membrane-like second gas separation material. A gas separation membrane spirally wound around a supply / exhaust pipe in which a composite membrane and the above-mentioned are stacked in the above order to form a unit, and a supply pipe for supplying raw material air and an exhaust pipe for exhausting permeated gas are integrated. In a module,
The first and second gas separations to the supply / exhaust pipe so that the raw material gas flow passage and the supply / exhaust pipe of the supply / exhaust pipe communicate with each other at one end of the winding start, and the permeation gas flow passage and the exhaust pipe of the supply / exhaust pipe communicate with each other. Adhere the composite membrane and put the first end so that the end of the winding closes the permeate gas channel.
And the second gas separation composite membrane are adhered to each other, and the both ends in the winding direction are sealed so that the raw material gas passage and the permeation gas passage are airtightly separated from each other, so that the raw material air flows over the surface of the gas separation membrane. A flow distance can be lengthened and a gas separation membrane module with high concentration efficiency can be obtained.

Although the gas separation composite membranes 2-1 and 2-2 of this embodiment have the same gas separation membrane structure, this may be a combination of gas separation composite membranes using different gas separation membranes, For example, by using a gas separation membrane having a high separation property as in this embodiment as the first gas separation composite membrane and using a gas separation membrane having a high permeability such as polydiphenylacetylene as the second gas separation composite membrane. Moreover, the concentration efficiency can be further enhanced.

Further, in the present embodiment, a raw material gas flow path material,
A flat membrane-like first gas separation composite membrane, and a permeating gas channel material,
A flat membrane-like second gas separation composite membrane is overlaid to form one unit,
Although only one set is wound around the supply and exhaust pipe in a spiral shape, a plurality of sets may be wound.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings. FIG. 5A is a horizontal sectional view of the gas separation membrane module of this embodiment, and FIG. 5B is a vertical sectional view thereof.

As shown in FIG. 5, the air supply / exhaust pipe 4 has a structure in which a partition plate is provided perpendicularly to the lengthwise direction, and a spiral module is manufactured in the same manner as in the first embodiment and is housed in a pressure vessel to be connected to the air supply pipe 5. The nitrogen enriched air flow rate obtained from the flow rate control valve 9 is 8.3 × by supplying pressurized air 4.2 × 10 ⁻⁴ m ³ / s (25 l / min) to 592 Pa (5 kgf / cm ² G). When adjusted to 10 ^-5 m ³ / s (5 l / min), the nitrogen concentration was 97.0%.

As described above, according to this embodiment, the raw material gas flow path member and the flat membrane-like gas separation composite membrane folded back with the permeation gas flow path material sandwiched therebetween are made into one unit, and the length direction is set. A gas separation membrane module spirally wound around an air supply / exhaust pipe in which a partition plate is installed perpendicularly to the end of one end of the gas separation composite membrane, and one end of the start of winding The gas separation composite membrane is adhered to the supply / exhaust pipe so that the raw material gas flow passage and the supply / exhaust pipe are connected to each other, and the permeation gas flow passage and the exhaust pipe of the supply / exhaust pipe are connected to each other. By sealing the ends so that the raw material gas passage and the permeating gas passage are airtightly separated, the distance that the raw material air flows on the surface of the gas separation membrane can be lengthened, and the gas separation membrane module with high concentration efficiency can be obtained. Is obtained.

[0023]

As described above, according to the present invention, the raw material gas flow channel member and the flat membrane-shaped gas separation composite membrane folded back with the permeated gas flow channel member sandwiched therebetween are made into one unit, Is a gas separation membrane module spirally wound around an air supply / exhaust pipe in which an air supply pipe for supplying air and an exhaust pipe for exhausting permeated gas are integrated, and one end of the winding end is a folded portion of the gas separation composite membrane. The gas separation composite membrane is connected to the air supply / exhaust pipe so that the raw material gas flow passage and the air supply / exhaust pipe air supply pipe communicate with each other, and the permeate gas flow passage communicates with the air supply / exhaust pipe exhaust pipe at one end of the winding start. By sealing the raw material gas flow passage and the permeating gas flow passage so as to hermetically separate the raw material gas flow passage and the permeating gas flow passage from each other, or the raw material gas flow passage material and the flat film-like first gas. The separation composite membrane, the permeating gas channel material, and the flat membrane-shaped second gas separation composite membrane are arranged in the above-mentioned order. It is a gas separation membrane module that is spirally wound around an air supply / exhaust pipe in which an air supply pipe for supplying raw material air and an exhaust pipe for exhausting permeated gas are integrated into one unit. The first and second gas separation composite membranes are adhered to the air supply / exhaust pipe so that the raw material gas flow passage and the air supply pipe of the air supply / exhaust pipe communicate with each other, and the permeation gas flow passage communicates with the exhaust pipe of the air supply / exhaust pipe. , The first and second gas separation composite membranes are adhered so that one end of the winding end closes the permeable gas flow passage, and both ends in the winding direction airtightly separate the raw material gas flow passage and the permeable gas flow passage. By sealing the gas separation membrane with the above, the distance that the raw material air flows on the surface of the gas separation membrane can be lengthened, and a gas separation membrane module with high concentration efficiency can be obtained.

[Brief description of drawings]

FIG. 1 is a developed transverse sectional view of a gas separation membrane module according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a completed assembly product of the gas separation membrane module according to the first or second embodiment of the present invention.

FIG. 3 is a developed transverse cross-sectional view showing a modified example of the gas separation membrane module according to the first embodiment of the present invention.

FIG. 4 is a developed transverse sectional view of a gas separation membrane module according to a second embodiment of the present invention.

FIG. 5 (a) is a developed horizontal sectional view of a gas separation membrane module according to a third embodiment of the present invention.

FIG. 6 is a block diagram of a conventional spiral separation membrane module.

[Explanation of symbols]

 1 Raw Material Air Channel Material 2 Gas Separation Composite Membrane 2-1 First Gas Separation Composite Membrane 2-2 Second Gas Separation Composite Membrane 2-3 Membrane Encapsulation Material 3 Permeation Gas Channel Material 4 Supply / Exhaust Pipe 5 Supply Trachea 6 Exhaust pipe 7 Sealant 8 Pressure vessel

Front page continued (72) Inventor Takaki Kobayashi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Masaya Sudo, 1006 Kadoma, Kadoma City Osaka Prefecture Katsuhide Kinji 1006 Kadoma, Kadoma-shi, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A feed gas pipe for supplying raw material air and a permeated gas are exhausted by stacking a raw material gas flow path member and a flat membrane-like gas separation composite membrane folded back with a permeated gas flow path material sandwiched therebetween. A gas separation membrane module spirally wound around a supply / exhaust pipe that is integrated with an exhaust pipe, so that one end of the winding end is a folded portion of the gas separation composite membrane and one end of the winding end is a raw material. Adhere the gas separation composite membrane to the air supply / exhaust pipe so that the gas flow passage and the air supply pipe of the air supply / exhaust pipe communicate with each other, and the permeate gas flow passage and the exhaust pipe of the air supply / exhaust pipe communicate with each other. The part is a gas separation membrane module characterized in that a raw material gas passage and a permeating gas passage are hermetically separated from each other. 2. A raw material gas flow channel material, a flat membrane-shaped first gas separation composite membrane, a permeation gas flow channel material, and a flat membrane-shaped second gas separation composite membrane are stacked in the order described above. A gas separation membrane module that is spirally wound around an air supply / exhaust pipe that integrates an air supply pipe that supplies raw air and an exhaust pipe that exhausts permeated gas. The first and second supply / exhaust pipes are connected so that the gas flow passage and the supply / exhaust pipes communicate with each other, and the permeate gas flow passage and the exhaust pipes of the supply / exhaust pipe communicate with each other.
The gas separation composite membrane is adhered, the first and second gas separation composite membranes are adhered so that one end of the winding end closes the permeation gas flow passage, and both side ends in the winding direction permeate the raw material gas flow passage. A gas separation membrane module, characterized in that a gas channel is hermetically sealed. 3. An air supply / exhaust pipe having an air supply pipe and an exhaust pipe provided horizontally to the length direction of the air supply / exhaust pipe.
The gas separation membrane module described. 4. The gas separation membrane module according to claim 1, further comprising a supply / exhaust pipe provided with an air supply pipe and an exhaust pipe, which partition the interior of the supply / exhaust pipe.