JPH0646498Y2 - Membrane sealing structure in membrane support plate passage hole - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an improvement in a membrane sealing structure in a membrane support plate passage hole in a plate & frame type filtration device.

<Prior Art> In the plate & frame type filtration device, a membrane support plate with permeate passage grooves on both sides with membranes attached to both sides is made into a unit, and a large number of units are used as raw material passage gaps between the units. The raw liquid is circulated under pressure in this raw liquid passage, and the permeated liquid that has permeated the membrane of the unit is guided to the permeated liquid passage of the filtration device through each permeated liquid passage groove of the membrane support plate. .

FIG. 2 shows a known seal structure for a stock solution passage hole in such a plate-and-frame type filtration device, which is a membrane support plate 1 '.
Eyelet-shaped rubber packing 3'is attached to the undiluted solution passage holes of the unit u'provided with the membranes 2'and 2'on both sides, and the packing device unit is laminated via a pair of passage spacers 4'and 5 '. I am doing it. Thus, the stock solution is guided from the stock solution passage A'to the stock solution passage B'between the units through the stock solution passage groove 41 'of the spacer 4'.

<Problems to be Solved> In the above, in order to mount the eyelet-shaped rubber packing 3'into the undiluted solution passage hole 11 'of the unit u', one collar of the eyelet-shaped rubber packing 3'is shrunk and this shrunk. It is necessary to pass the brim in the open state through the undiluted solution passage hole of the unit, and then to expand the brim in the deflated state by the elasticity of the packing. Therefore, when the tsuba is expanded, the inner surface of the tsuba that is being expanded touches one of the films at the peripheral edge of the passage hole of the unit, and the film of that part rubs for the expansion operation of the tsuba. To be Since the expanding operation is not uniform, wrinkles are likely to occur on one of the films at the peripheral portion of the passage hole. Sealing property (sealing property between the membrane and the membrane supporting plate) under the occurrence of such wrinkles
It is unavoidable that the effect of improving the sealing property by using eyelet-shaped packing is unavoidable.

An object of the present invention is to provide a seal structure for a passage hole of a plate-and-frame type filtration device, which is excellent in sealing property by eliminating generation of wrinkles in the membrane at the peripheral portion of the passage hole.

<Means for Solving the Problem> A membrane sealing structure in a membrane supporting plate passage hole according to the present invention has a membrane supporting plate provided with permeate passage grooves on both sides thereof, and the membrane supporting plate is provided on both sides of the membrane supporting plate. Eyelet-shaped packing is installed in the passage hole of the above, and each collar surface of the packing is pressed by the passage spacers, and the eyelet-shaped packing is divided in the body portion with a surface substantially parallel to the collar surface as a division surface. This is a feature.

<Description of Embodiments> The present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a membrane support plate (made of metal such as stainless steel or synthetic resin) having permeate passage grooves on both sides by corrugating both sides of the plate.
Is equipped with. Reference numerals 2 and 2 denote membranes. For example, a polysulfone-based ultrafiltration membrane or a microfiltration membrane is formed on a support sheet such as a nonwoven fabric so that the filtration membrane surface is the outer surface side of the membrane support plate 1. It is attached to both sides. A unit u is composed of the membrane supporting plate 1 and the membranes 2, 2.

3 is a eyelet-shaped packing mainly made of synthetic rubber or the like, and is a disc member 3 having a core portion 310 in an inner peripheral portion, which is divided into two as a divided surface substantially parallel to the flange surface in the body portion.
1 and a smooth disc member 32. Numerals 4 and 5 are ring-shaped passage spacers (for example, heat-resistant synthetic resin molded products such as polypropylene, polyphenylene sulfide, polyether sulfone, etc., and radial stock solution passage grooves 41, ... Are formed on one side of one spacer 4. Reference numeral 42 denotes a pin integrally provided on the spacer 4, and the packing 3 and the spacer 5 are provided with an insertion hole for this pin.

To assemble the above device, the inner peripheral core portion 310 of the packing member 31 is attached to the stock solution passage hole 11 from one surface side of the unit u, and the packing member 32 is abutted on the other surface side of the unit u,
The spacers 4 and 5 for passage are brought into contact with the packing members 31 and 32, the pin portions 42 of the spacer 4 are press-fitted into the pin insertion holes of the packing members 31 and 32 and the spacer 5, and the pin heads are crushed by heating and melting. It is sufficient to process, stack the units u, ... And fasten the stacked body by the fastening means (for example, sandwich the stacked body with end plates and fasten these end plates with stay bolts).

In this case, it is not possible that both rubber packing members remain in the original disk shape and the inner surface of the collar comes into contact with the film of the unit, causing relative slip between each member and the film. No vertical wrinkles are exerted on the membrane during the above-mentioned assembly, so that no wrinkling occurs in the membrane portion around the passage holes.

In addition, since the packing material is interposed between the membrane supporting plate and the spacer to alleviate the tightening pressure acting on the membrane, the membrane in the seal portion can be well protected and the seal stability can be sufficiently maintained.

In the above, the contact interface f between the packing members 31 and 32
Does not directly affect the sealing property between the membrane in contact with the packing and the support plate, and the passage A and the passage B are communicated with each other by the undiluted solution passage groove 41 of the spacer 4, and the differential pressure therebetween is Since the interface f is substantially zero, and the interface f has almost no involvement in the sealing property, the sealing property is deteriorated due to the presence of the interface f, and even if it is present, it can be kept small.

<Effects of the Invention> As described above, according to the membrane sealing structure of the membrane supporting plate passage hole according to the present invention, the membrane around the passage hole is moderately buffered by the packing material without generating wrinkles or the like. It can be brought into close contact with the support plate by the pressure of, and good sealing property of the close contact surface can be maintained.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention, and FIG. 2 is an explanatory view showing a conventional example. In the figure, 1 is a membrane support plate, 2 and 2 are membranes, 31 and 32 are packing members, and 4 and 5 are spacers.

Claims (1)

[Scope of utility model registration request] 1. A membrane supporting plate having permeate passage grooves formed on both sides thereof is provided with a membrane, and eyelet packing is attached to a passage hole of the membrane supporting plate, and each collar surface of the packing is provided with a passage. A structure for sealing a membrane in a membrane support plate passage hole, characterized in that the eyelet-shaped packing is divided by a plane substantially parallel to the flange surface in the body portion as a division plane in a structure in which the space is pressed by a spacer for use.