JPH0620516B2 - Plate for flat membrane separation device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a plate for a flat membrane separation device for performing a membrane separation treatment using a semipermeable membrane such as an ultrapermeation membrane or a reverse osmosis membrane. .

<< Prior Art >> Flat membrane type separators are widely used for food manufacturing processes, wastewater treatment, etc., and the plate as a separating element is a plate-like substrate made of synthetic resin with uneven surface A liquid portion is provided and a film is stretched over the liquid collecting portion.

The flat membrane separation device is assembled by laminating a plurality of these plates with a gasket interposed, and in performing the membrane separation process using this, the gap formed between the adjacent plates depending on the gasket thickness is used. It is carried out by supplying the undiluted solution to the, and collecting the permeated solution that has passed through the membrane in the collecting section.

The throughput of the flat sheet membrane separator is proportional to the membrane area. Therefore, if the surface area of the plate is large, the membrane separation treatment can be advantageously performed.

Therefore, the present inventor previously manufactured a plate by injection molding a frame body and an overbody separately in JP-A-63-267043.
By combining these, we succeeded in producing a plate with a large membrane area.

That is, in the plate 1 of this prior application, as shown in FIG. 6, four rectangular window portions 2, 2, ... Are provided in a vertically elongated rectangular frame body a made of synthetic resin, and shown in FIG. It is configured by fitting an excess body b as described above.

In the overbody b, concave portions 4 and convex portions 5 are alternately arranged on the front surface and the back surface of a plate-shaped substrate 3 made of a synthetic resin having the same outer shape as the window portion 2 to form a liquid collecting portion 6. , The film 7 on the liquid collecting part 6
It is formed by fixing the upper and lower ends and the left and right ends with the film stopper member 8.

The overbody b is incorporated into the window 2 by fitting the periphery of the window 2 into a stepped periphery 9 as shown in FIG. 8 and fitting the periphery of the overbody b on the bottom wall surface 10. The upper surface of the excess body b is held by the minute projections 12 provided on the upper side wall surface 11.

<< Problems to be Solved by the Invention >> However, since the plate of the above-mentioned prior application is designed to hold the excessive body fitted in the window portion of the frame body by the minute projections,
If the body is removed from the frame many times, such as when the membrane is replaced, the minute protrusions are worn and finally the body cannot be held.

In addition, the pressing force at the time of stacking and assembling the plates causes the left and right parts of the window, that is, the outer frame, to bulge out, creating a gap between the excess body and the frame body, which tends to cause liquid leakage. There was a point.

<< Means for Solving the Problems >> The present invention has been made to solve the above problems, and includes a frame body having a rectangular window portion formed by a stepped peripheral edge, and a film on the substrate. A flat membrane separation device plate comprising an overbody formed by being stretched, and the overbody being fitted into the window section, wherein the side wall surface of the stepped peripheral edge of one side of the window section is A side wall surface that is formed at an acute angle with the bottom wall surface and that faces the acute side wall surface of the excess body is formed at the same angle as the acute side wall surface. Is.

<< Operation >> The present invention is configured as described above, and acts so that the acute-angled side wall surface of the plate abuts and matches the acute-angled side wall surface.

<< Example >> An example of the present invention is described based on a drawing. It should be noted that the same components in the related art will be described with the same reference numerals.

FIG. 1 is a front view of a flat sheet membrane separation device plate 1 according to the present invention, which is composed of a frame body a and an excess body b.

Of these, the frame a is made of synthetic resin and integrally molded by injection molding, and has a generally flat, vertically long rectangular shape. The rectangular window portions 2, 2, ... Are opened.

The peripheral edge of each window 2, 2, ... Is formed of a stepped peripheral edge 9 as shown in FIGS.

The stepped peripheral edge 9 on one outer side of each window 2, 2, ...
Side wall surface 11 is formed with an acute taper with respect to 0,
Further, the opposing outer and inner bottom wall surfaces 106 (protrusion locking portions 10a, 10b are integrally formed with the frame a).

Above and below the frame a, an upper opening 13, a lower opening 14, a permeate hole 15 that forms a permeate passage, and a concentrate that forms a concentrate passage when the plates 1 are stacked are formed. A liquid hole 16 is formed, and a central portion opening 17 that forms a passage for the undiluted solution is also formed in the central portion.

A ring-shaped gasket stopping groove 18 is provided around the back surface of the frame body a, and the frame body a corresponding to the groove 18 is provided.
A gasket contact groove 19 is provided on the surface of the.
A support piece 20 is integrally formed so as to protrude to the left and right above the frame body a.

The overbody b has the same outer shape as the window portions 2, 2 ... of the frame body a,
The film 9 is wound around a substrate 3 made of synthetic resin having a thickness slightly smaller than the thickness of the frame a.

On the front surface and the back surface of the substrate 3, the concave streak portions 4 and the convex streak portions 5 are alternately provided at a predetermined interval to form a liquid collecting section 6.
The film 7 is wound in the longitudinal direction of the substrate 3 so as to cover the liquid collecting portion 6, and the film stopping member 8 is provided around the substrate 3 from above the film 7.
The membrane 7 is fixed by pressing.

The side wall surface shape of one side on the outer side of the substrate 3, that is, the side wall surface shape corresponding to the acute side wall surface of the windows 2, 2, ... Is formed to have the same taper as the acute side wall surface. Further, the engaging portions 3 of the concave ridges into which the locking portions 10a, 10b of the ridges of the windows 2, 2 ... Are fitted on the outer and inner bottom wall surfaces.
a and 3b are formed integrally with the substrate 3.

In order to assemble the overbody b on the frame a, first, the film 7 is stretched on the substrate 3 of the overbody b, and this is applied to the window portions 2, 2 ...
Insert it in.

That is, as shown by the two-dot chain line in FIG.
2 is performed by contacting the stepped peripheral edge portion 9 of the acute side wall surface with the acute side wall surface of the substrate 3 and then contacting the inner side of the stepped peripheral edge 9 with the inside of the substrate 3. At this time, the windows 2, 2 ...
The engaging portions 10a and 10b are fitted into the engaging portions 3a and 3b of the board 3.

After the excess body b is fitted into the frame body a, several places (four places in the embodiment) inside the substrate 3 are fixed by the plate screws 21 and the washers 22. Therefore, notches are provided in the frame body a and the substrate 3 so that the washer 22 does not project from the surface of the frame body a, and the frame body a is provided with an insertion hole for the countersunk screw 21.

On the other hand, in order to remove the excess body b from the frame body a, the countersunk screw 21 and the washer 22 may be removed and the inside of the excess body b may be pressed from the back side of the frame body a.

The permeated liquid from the excess body b incorporated in the frame a is passed through the permeated liquid hole 1
In order to discharge to 5, the notch of one corner of the substrate 3 is cut out and a rubber packing 23 of the same size as this notch is adhered to the substrate 3 as shown in an enlarged view in FIGS. The pipe 24 is penetrated from the permeate hole 15 to the rubber packing 23.

Therefore, the frame a of the permeated liquid hole 15 and the rubber packing 23 have the through holes 2 communicating with the liquid collecting portion 6 provided in the substrate 3.
5 are provided.

Regarding the plate having the central hole 7 and the permeated liquid hole 15 and the concentrated liquid discharge holes 16 on the upper and lower sides, the present inventor has previously disclosed Japanese Patent Laid-Open No. 63-107708.
Since it is a plate proposed by No. 1, the detailed description of the function of each opening is given to the prior application, but in order to assemble a flat sheet membrane separation device using this plate 1, first, a plurality of plates 1 ( For example, 10 sheets) are laminated with a gasket interposed to form one unit, and this unit is an intermediate plate (not shown).
A plurality of layers are stacked to assemble.

Also, in the first unit, the passage of liquid is through the upper and lower openings 13,14.
From the central opening 17 to the upper and lower openings 13 and 14 in the next unit. Moreover, the concentrated liquid and the permeated liquid are also discharged from the passage formed when the plates are stacked.

According to this embodiment, the side wall on one side of the stepped peripheral edge of the window portion of the frame body is tapered with an acute angle, and the side wall on one side of the excessive body is also tapered, and these tapers are aligned with each other. Since the overbody is fitted into the frame by the above, the window can be prevented from being worn out, and the overbody and the frame can be repeatedly assembled, so that the plate having excellent durability can be obtained.

Further, since the engaging portions are provided on the bottom wall surfaces of the stepped peripheral edges of the window portion facing each other, and the engaging portions to be fitted into the engaging portions are provided on the overlying board, a plurality of overlying bodies are pressed and laminated. When assembling the membrane separation apparatus by the above, the pressing force prevents the bulging of the window portion of the frame body from being caused by the substrate, and effectively prevents the inconvenience that a gap is formed between the excess body and the frame to cause liquid leakage.

Further, since the permeated liquid collected in the excess liquid collecting portion is discharged to the permeated liquid hole provided in the frame body through the rubber packing, there is no possibility of mixing the raw liquid into the permeated liquid. The permeated liquid can be effectively obtained.

In the above-mentioned embodiment, the plate provided with the central hole is shown, but a plate similar to the conventional one not using this may be used, and four frames are vertically and horizontally assembled on the frame body. Although the example in which they are incorporated is shown, they may be incorporated in the upper and lower two pieces or the upper, lower, middle and left and right six pieces.

Further, although the tapered stepped peripheral edge is provided outside the window portion, it may be provided inside. However, if it is provided outside as in this embodiment, the left and right bodies can be held by a single washer, which is convenient.

<< Effects >> According to the present invention, as described above, the side wall on one side of the stepped peripheral edge of the window portion of the frame body has an acute-angle taper, and the side wall on one side of the excessive body also has the same taper. Since the windows are fitted to each other so as to be assembled, the window portion is not worn unlike the conventional case, and the overbody and the frame can be repeatedly assembled, so that the plate having excellent durability can be obtained.

Further, since the engaging portions are provided on the bottom wall surfaces of the stepped peripheral edges of the window portion facing each other, and the engaging portions to be fitted into the engaging portions are provided on the overlying board, a plurality of overlying bodies are pressed and laminated. When assembling the membrane separating device, the bulging of the window portion of the frame due to this pressing force is prevented by the substrate, and a gap is generated between the excess body and the frame,
The inconvenience of liquid leakage is effectively prevented.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a front view thereof, FIG. 2 is an enlarged sectional view taken along line II-II of FIG. 1, and FIG. 1 is an enlarged sectional view taken along line III-III in FIG. 1, FIG. 4 is an enlarged sectional view taken along line A in FIG. 1, FIG. 5 is an enlarged sectional view taken along line VV in FIG. 4, and FIGS. FIG. 6 is a front view of the plate and FIG. 7 is a VII-V of FIG.
An enlarged sectional view taken along line II and FIG. 8 are exploded perspective views of the excess body. 1 ... Plate 2 ... Window part 3 ... Substrate 3a, 3b ... Engaging part 6 ... Liquid collecting part 7 ... Membrane 9 ... Stepped peripheral edge 10 ... Bottom wall surface 10a, 10b ... Locking part 11 ... Side wall a ... Frame body b ... Excessive body

Claims (1)

[Claims] 1. A frame body having a rectangular window portion formed with a stepped peripheral edge and an overbody formed by stretching a film on a substrate. The overbody is fitted to the window portion. In the plate for a flat membrane separation device configured as described above, the side wall surface of the stepped peripheral edge of one side of the window portion is formed to form an acute angle with the bottom wall surface, and the side opposite to the acute side wall surface of the excess body. The flat plate separation apparatus plate, wherein the wall surface is formed to have the same angle as the acute-angled side wall surface.