JPH0347125B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to fluid separation devices, and more particularly to:
A permeable membrane body that partitions a first region forming a flow path for supply source fluid and a second region forming a flow path for permeate fluid, and a member communicating with the second region to lead out the permeate fluid. An original external filtration membrane used as a permeable membrane body, particularly at a relatively low pressure, regarding a device for separating fluids by a membrane element having a generally cylindrical shape and having a hollow tube. Alternatively, it is suitable for a fluid separation device using a precision membrane.

Conventionally, this type of fluid separation device includes a spiral membrane module, a pleated membrane module,
Also known are those based on laminated membrane modules and the like. These conventional devices are constructed by loading one membrane element or a plurality of membrane elements connected in series into a cylindrical container, for example, a conventional fluid separation device using two spiral membrane elements. An example is shown in FIG. 1 as a cross-sectional view. In this conventional example, the spiral membrane element 1
The permeable membrane, raw fluid channel material, and permeated fluid channel material are 1
It is constructed by winding a group of materials in a spiral shape around a perforated hollow tube 2, and the pressurized raw fluid supplied from the left side in the figure is guided to the perforated hollow tube through a permeable membrane. The permeate fluid is separated into the remaining concentrated fluid. The ends of the perforated hollow tubes 2 passing through the center of such a membrane element 1 or the ends of the perforated hollow tubes 2 and the hub 4, which is the end plate 3b, are connected to each other by internal joints 5, 5. connected in series,
It is housed in a cylindrical container 6. Both ends of the cylindrical container 6 are closed with end portions 3a and 3b, and fixed with bolts 7...7. A raw fluid inlet 31a is formed at one end 3a, a concentrated fluid outlet 31b is formed at the other end plate 3b, and a permeate fluid outlet is formed at a hub 4 formed inward from the center of the end plate 3b. 3
1c is perforated. The upstream ends of the perforated hollow tubes 2 connected in series are sealed with a cap 8, and a packing 9 is provided around the outer periphery of the membrane element 1 to prevent mixing of the raw fluid and the concentrated fluid.

In the conventional fluid separation device as described above,
When used for a long period of time, the container 6 and membrane element 1
When the fluid accumulated in the dead space S formed by the packing 9 is denatured, especially when the fluid is a liquid containing organic matter,
Microorganisms may multiply and decompose organic matter, producing a bad odor or decomposing the film. In addition, when used in an ultrapure water production line that requires high-purity permeated water, there is a problem that the rise in purity of the permeated water is extremely slow because liquid accumulates in the dead space S. Have points. Furthermore, conventional fluid separation devices are always constructed by housing the membrane element in a cylindrical container made of FRP, stainless steel, etc., but the manufacturing cost of this cylindrical container is much lower than the cost of the entire device. It accounts for a very large proportion of the cost.

The present invention has been made in view of the above, and in addition to directly covering the membrane element itself with resin, coupling members are fixed to the outer periphery of both ends of the membrane element to omit the cylindrical container, thereby achieving low cost. The purpose is to supply a reliable fluid separation device that is inexpensive and does not require dead space.

Hereinafter, embodiments of the present invention will be explained based on the drawings.

FIG. 2 is a sectional view of two connected embodiments of the present invention using spiral membrane elements.

The inner diameter surface of the other end of a connecting flange tube 102 having an outwardly protruding flange portion at one end is fitted into the outer periphery of both ends of the membrane element 101, and the outer periphery of the membrane element 101 is covered with resin over the entire width. 103 are directly joined. This resin 103 seals and protects the outer periphery of the membrane element 101, and also connects the connecting flange pipe 102 to the membrane element 101.
It has the effect of fixing to 1. For example, FRP or the like can be used as this resin material, and it covers the membrane element 101 and the connecting flange pipe 1.
An example of a manufacturing method for fixing 02 is shown below.

First, a spiral-shaped membrane element 101 is formed by winding a group of materials around a hollow tube and reinforcing the outermost periphery with tape, etc., and a bond formed from polyvinyl chloride, ABS resin, etc. is attached to the outer periphery of both ends. Insert the inner diameter surface of the flange pipe 102. Next, the outer periphery of the membrane element 101 and the connecting flange tube 102 are impregnated with resin in glass fibers and wound around and hardened to form the unit U by a so-called filament winding method. If a stepped portion is provided on the outer diameter surface of the insertion portion of the engagement flange pipe 102 as shown in FIG. 2, it will be easily fixed by the resin 103. Further, if necessary, an adhesive may be used when fitting the coupling flange pipe 102 into the membrane element 101. Furthermore, in order to prevent the spiral membrane element 101 from becoming telescoped due to axial misalignment between the center and the outer periphery during operation, a telescope prevention member formed of a flat plate with holes or the like is provided. 104 is desirable.
This telescope prevention member 104 may be formed integrally with the coupling flange pipe 102.

The units U formed in this manner are connected to each other by a Victor joint 105 at the flange portion of the connecting flange pipe 102, and an end plate 10 is attached to one side of the most upstream and most downstream units U.
6a and 106b are joined at similar joints. At this time, the hub 1 of the downstream end plate 106a
The perforated hollow pipes of 07 and the most downstream unit U, and the perforated hollow pipes of each unit joint are connected to the internal pipe joint 1.
08, and one end of the perforated hollow tube of the most upstream unit U is sealed with a cap 109. A raw fluid inlet 110 is formed in the upstream end plate 106a, and a concentrated fluid outlet 11 is formed in the downstream end plate 106b.
1 is formed, a hub 107 is formed inward from the center of the end plate 106b, a permeate fluid outlet 112 is bored, and raw fluid is supplied from the raw fluid inlet 110,
The retentate fluid and permeate fluid are configured to be removed from the retentate fluid outlet 111 and the permeate fluid outlet 112 .

In the above-described embodiments, it has been explained that the units are connected to each other or the units and the end plates are connected using Victory type joints, but it is of course possible to use other split type joints, such as sanitary type joints. Further, as shown in a sectional view of the main part in FIG. 3, the flange portion of the connecting flange pipe 201 may be fastened with bolts 202 and nuts 203. Furthermore, as shown in the cross-sectional view in FIG. 4, nipple-shaped pipe joints 302 with male threads carved on the outer periphery are fixed to the outer periphery of both ends of the membrane element 301 with resin 303, and the units have female threads on both ends. The two units are connected by a socket-shaped pipe joint 304 that is carved with
305b may be installed. At this time, it is desirable to attach a sealing O-ring 306 or packing to the outer peripheral end surface of the nipple-shaped pipe joint 302 fixed to both ends of the membrane element 301 to improve the sealing performance.

The case where a plurality of units are connected in series has been described above, but if end plates are attached to both ends of the unit, even one unit can be used. In addition, although the spiral membrane element has been described as a monofilament spiral in which one set of material groups is wound around a perforated hollow tube, it may be a biplane spiral in which two or more sets of material groups are wound. Of course, pleated or laminated membrane elements may also be used.

As explained above, according to the present invention, a dead space is not formed around the outer periphery of the membrane element, so when it is used to separate liquids containing organic matter, etc., the growth of microorganisms that occurs in the dead space, the generation of bad odors due to the decomposition of organic matter, etc. Inconveniences such as membrane decomposition do not occur, and the rise in permeate water purity is good even when used in ultrapure water production lines. Furthermore, since there is no need for a cylindrical container to house the membrane element, manufacturing costs are reduced, and if you wish to change the number of connected elements, you can simply increase or decrease the number of units. It became like that.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a conventional fluid separation device;
3 is a cross-sectional view of a main part of another embodiment of the present invention, and FIG. 4 is a cross-sectional view of another embodiment of the present invention. 1... Membrane element, 6... Cylindrical container, 101
... Membrane element, 102 ... Flange pipe for coupling, 103 ... Resin, 105 ... Victory type joint, 106a, 106b ... End plate, 20
1... Connection flange pipe, 301... Membrane element, 302... Pipe joint, 303... Resin, 304
... Pipe joint, 305a, 305b ... End plate, 30
6...O-ring.

Claims (1)

[Claims] 1. A permeable membrane that partitions a first region forming a flow path for supply source fluid and a second region forming a flow path for permeate fluid, and communicating with the second region to lead out the permeate fluid. In an apparatus for separating a raw fluid into a permeate fluid and a concentrated fluid, the membrane element has a generally cylindrical membrane element comprising a perforated hollow tube, and the outermost peripheral surface of the membrane element is directly covered with a resin. In addition, a fluid separation device characterized in that a coupling member is fixed to the outer periphery of both ends of the membrane element using the resin.