JP2000093761A - Fluid separation element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reuse a raw water seal member and to simplify work for replacing a fluid separation element by forming a membrane unit including a separation membrane, a filtrate channel material, and a raw liquid channel material around a drainage pipe and arranging the raw water seal member in the end part of the membrane unit with an opening part turned upstream. SOLUTION: In a fluid separation element 1, a membrane unit 7 including a separation membrane 4, a filtrate channel material 5, and a raw liquid channel material 6 is installed around a drainage pipe 3 having drainage holes 2, a seal holder 30 for forming a raw liquid seal member 9 is installed on the upstream side in the raw liquid flow direction of the membrane unit 7. The member 9 having a C-shaped cross section is fitted freely attachably/detachably to the holder 30 so that its opening part is the upstream side. The element 1 is housed in a pressure container and used as a fluid separation membrane module. When a plurality of the elements 1 are housed, a telescope preventive plate 36 is formed in each downstream side end part to prevent the deformation of the membrane unit 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a fluid separation element. More specifically, the present invention relates to a fluid separation element suitable for use in a reverse osmosis device, an ultrafiltration device, a microfiltration device, and a gas separation device.

[0002]

2. Description of the Related Art In recent years, ultrapure water applications in seawater desalination and semiconductor fields, as well as general brine applications and organic matter separation,
In various fluid separation fields using a permeated liquid of a membrane, such as wastewater reuse, the use of a fluid separation element using a separation membrane is rapidly increasing.

A plurality of fluid separation elements are usually housed in a plurality of pressure vessels and used as a separation membrane module. In order to prevent a stock solution from flowing through a gap between the pressure vessel and the fluid separation elements, as shown in FIG. In addition, a stock solution seal member 11 having a V-shaped cross section is attached to the seal holder 10 so that the opening 12 thereof faces the upstream side in the stock solution flow direction.

The undiluted liquid sealing member 11 has a maximum outer diameter (opening 12) larger than the inner diameter of the pressure vessel 15,
The maximum outer diameter is compressed to the size of the inner diameter of the pressure vessel 15, and the fluid separation element 20 is inserted into the pressure vessel 15. At this time, when the stock solution seal member 11 having a V-shaped cross section can be compressed more easily than when an O-ring is used as the stock solution seal member, the insertion and extraction work can be easily performed. Since the opening 12 is further opened by the differential pressure between the upstream side and the downstream side of the opening 12 of the stock solution sealing member 11, a sufficient sealing effect can be obtained.

However, when the fluid separating element 20 provided with such a V-shaped stock solution seal member 11 is housed in the pressure vessel 15, the opening 1 of the V-shaped stock solution seal member 11 is required.
It is necessary to insert the stock solution sealing member 11 into the pressure vessel 15 from the bent portion 13 so as not to be turned up. If it is inserted from the opening 12 and the opening 12 is turned up, the sealing performance is reduced, and sufficient performance cannot be exhibited. That is, the fluid separation element 20 is
Can be inserted only from the upstream side, and can be removed only from the downstream side.

[0006] When a plurality of fluid separation elements are housed in a pressure vessel and used as a separation membrane module, a fluid separation element located upstream of the pressure vessel is better than a fluid separation element located downstream. In addition, the increase in pressure loss and the decrease in separation performance are remarkable, and frequent replacement is required. Then, for replacement, the upstream fluid separation element is taken out of the pressure vessel for the replacement.After that, a new fluid separation element is arranged at the most downstream of the pressure vessel, and the usable old fluid separation element is continuously moved upstream. Move to the side. In this way, the oldest fluid separation element is arranged at the uppermost stream, and usually the oldest fluid separation element is replaced. At this time, in order to continuously move the usable fluid separation element to the upstream side, after taking out all the fluid separation elements once to the downstream side so as not to turn over the opening of the stock solution sealing member, From the upstream side, it is necessary to first house a new fluid separation element and then house the usable fluid separation element once removed.
However, in a large plant that uses thousands of fluid separation elements, the replacement work (removal,
It takes a lot of time and labor to move and store), and it is also necessary to secure a space for moving the fluid separation element.

[0007] Further, since the above-mentioned stock solution sealing member attached to the seal holder has a structure that is difficult to grasp and remove with a jig or the like at the time of removal, it can be used as a member. It is disposed of without being reused.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fluid separating element which can facilitate the replacement operation of the fluid separating element while reusing the stock solution sealing member, and a fluid separating membrane module using the same. It is to be.

[0009]

According to the present invention for achieving the above object, the present invention provides a liquid crystal display, comprising: a separation unit, a permeated liquid flow path material, and a raw liquid flow path material formed around a water collecting pipe; At the end of the membrane unit, a fluid separation element is provided in which a stock solution sealing member having a C-shaped cross section is provided so that its opening is on the upstream side in the stock solution flow direction.

Here, a seal holder is provided at an end of the membrane unit, and the stock solution sealing member is locked to the seal holder. The seal holder has a concave portion, and the stock solution sealing member is locked to the concave portion. Preferably, the opening of the stock solution sealing member is located in the recess of the seal holder. Also, the undiluted solution sealing member is
It is also preferable that the stock solution sealing member has a detachable grip portion upstream of the maximum outer diameter portion.

Further, a fluid separation membrane module in which the above-mentioned fluid separation element is housed in a pressure vessel is also a preferred embodiment.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fluid separation element 1 of the present invention shown in FIG. 2 comprises a separation membrane 4, a permeate flow path material 5, a raw liquid flow path material 6, and a water collection pipe 3 having a water collection hole 2. And a seal holder 30 for attaching the stock solution seal member 9 upstream of the membrane unit 7 in the stock solution flow direction. Then, a stock solution sealing member 9 having a C-shaped cross section is detachably mounted on the seal holder 30 so that the opening thereof is on the upstream side.

As shown in FIG. 3, the undiluted liquid sealing member 9 having a C-shaped cross section is in close contact with the inner wall of the pressure vessel 32, so that its maximum outer diameter portion 33 is larger than the inner diameter of the pressure vessel. The outer diameter of the opening 31 is smaller than the inner diameter of the pressure vessel 32. With such a shape, the opening 3
The opening 31 is hard to be turned up even when it is inserted into the pressure vessel 32 from 1, and it becomes possible to insert the pressure vessel 32 from both the upstream and downstream sides of the pressure vessel 32. When the fluid separation element 1 provided with the stock solution seal member 9 is inserted into the pressure vessel 32,
Since it can be compressed more easily (with the same force as the V-shaped stock solution sealing member 11) than the O-ring, the insertion and withdrawal work can be performed easily.

The material of the stock solution sealing member 9 is an elastic material having a rubber hardness of 70 to 90 degrees, for example, silicone rubber,
Nitrile rubber, fluoro rubber, ethylene propylene rubber, etc. are preferred.

The seal holder 30 for retaining the undiluted liquid seal member having a C-shaped cross section preferably has a recess 16 as shown in FIG. When the undiluted solution seal member is attached to the concave portion 16, the undiluted solution seal member can be prevented from shifting. It is preferable that the stock solution seal member 9 having a C-shaped cross section is opened in the recess 16. Since the opening 31 is in the recess 16, the opening 3
The probability of turning 1 can be further reduced.

As shown in FIG. 4, the stock solution sealing member 9 having a C-shaped cross section is attached and detached upstream of its maximum outer diameter portion 33 (the portion in close contact with the pressure vessel) in the stock solution flow direction. It is preferable to provide the hole 17 as a holding part for the use. By inserting a jig into this hole 17 and hooking the stock solution sealing member 9, the stock solution sealing member 9 can be easily removed from the seal holder, and as a result, reuse becomes possible.
The size of the hole 17 may be any size as long as the jig can be inserted. In addition, a knob or the like may be provided in order to directly remove by hand without using a jig.

The fluid separation element provided with the stock solution sealing member is housed in a pressure vessel and used as a fluid separation membrane module. As shown in FIG. 3, when accommodating a plurality of fluid separation elements 1, a telescope prevention plate 36 is provided at the downstream end of each fluid separation element 1 while preventing deformation of the membrane unit 7. Further, the water collecting pipe 3 communicates with the connector 45 interposed between the fluid separating elements 1 and is housed in the pressure vessel 32.

With such a fluid separation membrane module, the fluid is separated from the stock solution. As shown in FIG.
Numeral 0 is supplied to the stock solution flow path formed by the stock solution flow path material 5 in the membrane unit 7, and then is separated into those that have passed through the separation membrane 4 and those that have not passed through as they flow downstream. The permeated liquid that has passed through the membrane 4 is passed through the permeated liquid channel material 5.
Through the permeate flow path and the water collection pipe formed by
The material which did not pass through the separation membrane was used as the undiluted liquid channel material 5
Flows through the stock solution flow path formed by the

[0019]

The fluid separation element of the present invention is provided with a stock solution sealing member having a C-shaped cross section. Therefore, when the fluid separation element is inserted into or taken out of the pressure vessel as in the prior art, it can be used from one side. There is no need to temporarily place the extracted fluid separation element, carry it to the opposite side, and insert it, and it is possible to put it in and out of either pressure vessel. As a result, not only the workability at the time of the replacement work is good, but also the space required for the replacement work can be reduced, and the initial investment can be reduced.

Further, if the stock solution sealing member has a detachable grip, it can be easily removed and reused.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a fluid separation membrane module provided with a conventional stock solution sealing member.

FIG. 2 is a schematic perspective view of a fluid separation element according to one embodiment of the present invention.

FIG. 3 is a schematic longitudinal sectional view of a fluid separation membrane module according to one embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a stock solution sealing member mounted on the fluid separation membrane module of FIG.

[Explanation of symbols]

 1: Fluid separation element 2: Water collecting hole 3: Water collecting pipe 4: Separation membrane 5: Permeate liquid flow path material 6: Raw liquid flow path material 7: Membrane unit 9: Raw liquid seal member 10: Seal holder 11: Raw liquid seal member 12 : Opening 13: Bend 14: Maximum outer diameter 15: Pressure vessel 16: Concave 17: Hole 18: Telescope prevention plate 20: Fluid separation element 21: Membrane unit 22: Water collecting hole 23: Water collecting pipe 24: Stock solution 25: Permeate 30: Seal holder 31: Opening 32: Pressure vessel 33: Maximum outer diameter 36: Telescope prevention plate 40: Stock solution 41: Permeate 45: Connector

Claims (6)

[Claims] 1. A membrane unit including a separation membrane, a permeate flow path material and a raw liquid flow path material is formed around a water collection pipe, and a C-shaped cross section is formed at an end of the membrane unit. A fluid separation element, wherein a stock solution seal member is provided such that an opening thereof is on an upstream side in a stock solution flow direction. 2. The fluid separation element according to claim 1, wherein a seal holder is provided at an end of the membrane unit, and the stock solution sealing member is locked to the seal holder. 3. The fluid separation element according to claim 2, wherein the seal holder has a concave portion, and the stock solution sealing member is locked in the concave portion. 4. The fluid separation element according to claim 3, wherein the opening of the stock solution sealing member is located in the recess of the seal holder. 5. The fluid separation element according to claim 1, wherein the stock solution sealing member has a detachable grip portion upstream of a maximum outer diameter portion of the stock solution sealing member. 6. A fluid separation membrane module comprising a pressure vessel containing the fluid separation element according to claim 1.