JPH06246124A - Gas separation membrane module - Google Patents

Abstract

PURPOSE:To provide a spiral gas separation membrane module utilizing a flat gas separation composite membrane with improved adhesive strength to a sealant for making the raw gas passage and permeated gas passage airtight and independent and excellent in reliability. CONSTITUTION:This gas separation membrane is formed by spirally winding a gas separation composite membrane 2 pierced with many holes 11 at the sealed part of the membrane 2, a raw gas passage material 1, a permeated gas passage material 3 and a partition material 4 separating the raw gas passage and permeated gas passage and pierced with many holes 12 at the sealed part of the partition material 4 around a gas supply and discharge pipe 5 and sealing both end faces with a sealant 8.

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 gas separation composite membrane of a spiral type gas separation membrane module formed by winding a flat membrane is used as a siloxane polymer, poly (4 methyl pentene 1), polytrimethylsilyl propyne, etc. on a porous support. Polymers with excellent gas separation and gas permeability (gas separation membrane) are laminated, and polymers with excellent gas permeability like siloxane-based polymers and excellent gas permeation stability are protected layers. It is common to stack as.

In a spiral type gas separation membrane module formed by winding such a gas separation composite membrane, a raw material gas flow path and a permeable gas flow path are formed so that the raw material gas flow path and the permeable gas flow path are separated from each other. Need to be configured. Depending on the structure of the gas separation membrane module, it is necessary to make the raw material gas flow path and the permeation gas flow path airtight and independent, and only the permeation gas flow path need to be airtight and independent. The gas flow path is hermetically sealed by using a sealant to make it independent. Epoxy resin, urethane resin, etc. are generally used as the sealant.

[0004]

However, when a spiral gas separation membrane module is constructed by winding a gas separation composite membrane using the above conventional siloxane polymer as a gas separation membrane or a protective layer, a sealing agent is used. As an example, when an attempt is made to make the raw material gas passage and the permeation gas passage airtight by using epoxy resin, urethane resin, etc., the siloxane-based polymer has releasability. Had a problem that its adhesiveness was weak and lacked in reliability.

The present invention solves the above-mentioned conventional problems, and is a spiral type formed by winding a gas separation composite membrane excellent in stability using the above-mentioned conventional siloxane polymer as a gas separation membrane or a protective layer. The object of the present invention is to provide a highly reliable gas separation membrane module having improved adhesive strength between a gas separation composite membrane and a sealant.

[0006]

In order to achieve this object, a gas separation membrane module of the present invention comprises a raw material gas channel material, a flat membrane gas separation composite membrane, a permeable gas channel material, and a raw material. The partitioning material that separates the gas flow path and the permeable gas flow path is stacked in the above order to form a unit, and the supply and exhaust pipes around which the supply pipe for supplying the raw material air and the exhaust pipe for exhausting the permeable gas are integrated It is wound in a spiral shape on one side, and at one end of the winding, gas is supplied to the supply / exhaust pipe so that the raw material gas flow path and the supply / exhaust pipe supply pipe communicate with each other, and the permeated gas flow path and the supply / exhaust pipe exhaust pipe communicate with each other. The separation composite membrane and the partitioning material are bonded together, the gas separation composite membrane and the partitioning material are bonded so that one end of the winding end closes the permeation gas flow path, and the ends on both sides are the raw material gas flow path and the permeation gas flow. In a gas separation membrane module that is sealed with a sealant so that it is airtightly separated from the passage, a flat membrane is used. The sealing portion of the gas separation composite membrane or,
A large number of holes are provided in both the sealing portions of both the flat membrane-like gas separation composite membrane and the partition material.

[0007]

[Function] By providing a large number of holes in the sealing portion of the gas separation composite membrane using the siloxane polymer as the gas separation membrane or the protective layer or both the gas separation composite membrane and the partition material, sealing is achieved. Since the stopper enters the hole and sandwiches the gas separation composite membrane or the gas separation composite membrane and the partition material from both, the adhesive strength between the sealant and the gas separation composite membrane or the gas separation composite membrane and the partition material is improved. The gas separation membrane module is improved in the airtightness of the gas flow passage and the permeation gas flow passage and has excellent reliability.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of the gas separation membrane module of the present embodiment, and FIG. 2 is a view of a cell in which the gas separation membrane module of the first embodiment is housed in a pressure vessel.

In the figure, reference numeral 1 is a raw material gas flow path material and is a 15-mesh polyethylene molding net. Reference numeral 2 is a gas separation composite membrane, which is obtained by laminating a gas separation membrane of poly 4 methyl pentene 1 on a porous support in which a polyethylene terephthalate (hereinafter abbreviated as PET) nonwoven fabric and polysulfone (hereinafter abbreviated as PS) are integrated. Polydimethylsiloxane is laminated on the upper part, and the gas separation membrane side is arranged so as to face the raw material gas flow path member 1. One end of the winding start is the supply / exhaust pipe 5
It is airtightly adhered to.

Reference numeral 11 denotes a hole having a diameter of 3 mm formed in the sealing portion of the gas separation composite membrane 2. Reference numeral 3 is a permeating gas channel material, which is a 15-mesh polyethylene molding net. A partition member 4 is a PET film having a thickness of 100 μm, and one end of the winding start is air-tightly bonded to the air supply / exhaust pipe 5. Reference numeral 12 is a hole having a diameter of 3 mm formed in the sealing portion of the partition member 4. 5 is a supply and exhaust pipe,
The supply pipe 6 and the exhaust pipe 7 are arranged parallel to the length direction. A sealant 8 is an epoxy resin, which is a trade name Epomic (Mitsui Petrochemical Industry Co., Ltd.).

After the material of the partition material 4 is spirally wound around the supply / exhaust pipe 5 from the above-mentioned raw material gas flow path material 1, the gas separation composite membrane 2 and the partition material 4 are hermetically sealed at one end of the winding end. The ends of both side surfaces are adhered and sealed by the sealant 8 so that the raw material gas passage and the permeation gas passage are airtightly separated.

The gas separation membrane module constructed as described above is housed in the pressure vessel 9, and the air supply pipe 6 is connected to the 592 Pa.
Air pressurized to (5 kgf / cm ² G) 4.2 × 10 ^-4 m ³ / s
(25 l / min), and the flow rate of nitrogen-enriched air obtained from the flow control valve 10 is 8.3 × 10 ⁻⁵ m ³ / s (5 l / mi
When adjusted to n), the nitrogen concentration was 97.2%.

As described above, by providing a large number of holes in the sealing portion of the gas separation composite membrane and the sealing portion of the partition material, the sealant enters the holes and seals both the gas separation composite membrane and the partition material. Since the stopper is sandwiched, the gas separation composite membrane and the sealant are strongly bonded.

Although the above is one embodiment of the present invention, the material and numerical values are not limited.

[0015]

As described above, according to the present invention, the raw material gas flow path member, the flat membrane-like gas separation composite membrane, the permeable gas flow path member, and the raw material gas flow path and the permeable gas flow path are separated from each other. Partition material,
It is wound in a spiral shape around a supply / exhaust pipe in which a supply pipe for supplying the raw material air and an exhaust pipe for exhausting the permeated gas are integrated in one unit by stacking them in the above order. The gas separation composite membrane and the partition material are adhered to the supply / exhaust pipe so that the passage and the supply pipe of the supply / exhaust pipe are communicated with each other, and the permeated gas flow channel and the exhaust pipe of the supply / exhaust pipe are communicated with each other. Gas separation in which the gas separation composite membrane and the partitioning material are bonded so as to close the permeable gas flow path, and the ends of both side surfaces are sealed with a sealant so that the raw gas flow path and the permeable gas flow path are airtightly separated. In the membrane module, by providing a large number of holes in the sealing portion of the flat membrane-shaped gas separation composite membrane or the sealing portion of the flat membrane-shaped gas separation composite membrane and the sealing agent, the sealing agent enters the holes and gas. The separation composite membrane or the gas separation composite membrane and the partitioning material are sandwiched from both sides by the encapsulant, so the gas content is Composite film and the sealant and the gas separation membrane module having excellent reliability adhesive strength is improved to improve the airtightness of the material gas passage and permeate flow paths are obtained.

[Brief description of drawings]

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

FIG. 2 is a diagram of a cell in which a gas separation membrane module according to an embodiment of the present invention is housed in a pressure vessel.

[Explanation of symbols]

 1 Raw Material Air Flow Material 2 Gas Separation Composite Membrane 3 Permeation Gas Flow Material 4 Partition Material 5 Supply / Exhaust Pipe 6 Supply Pipe 7 Exhaust Pipe 8 Sealant 9 Pressure Vessel 10 Flow Control Valve 11 Gas Separation Membrane Hole 12 Hole on the partition

Claims (1)

[Claims] 1. A raw material gas flow path member, a flat membrane-like gas separation composite membrane, a permeating gas flow path member, and a partitioning member for separating the raw material gas flow path and the permeating gas flow path are stacked in the above order. One unit,
It is spirally wound around a supply / exhaust pipe in which a supply pipe for supplying the raw material air and an exhaust pipe for exhausting the permeated gas are integrated, and the raw material gas flow path and the supply pipe for the supply / exhaust pipe are provided at one end of the winding. The gas separation composite membrane and the partition material are bonded to the air supply / exhaust pipe so that the permeate gas flow path and the exhaust pipe of the air supply / exhaust pipe communicate with each other. In the gas separation membrane module in which the separation composite membrane and the partitioning material are adhered, and the end portions on both side surfaces are sealed with a sealant so as to airtightly separate the raw material gas passage and the permeation gas passage, 2. A gas separation membrane module, characterized in that a hole is opened in the sealing portion of the gas separation composite membrane or in both the flat membrane-shaped gas separation composite membrane and the sealing material.