JPH01249104A - Flat membrane-type separator - Google Patents

Abstract

PURPOSE:To rapidly extract an abnormal filter plate by providing a permeated liq. transfer port to a partition plate between blocks, sampling the flux in each block from the port, and easily detecting the occurrence of abnormality. CONSTITUTION:A permeated liq. port 16 is provided at the center of the central part and lower central position of a filter plate 6 in the flat membrane-type separator, and a permeated liq. transfer port is provided to the partition plate 5a separating the blocks at a position corresponding to the permeated liq. port 16. A raw liq. is supplied to the separator. When the abnormality such as the infiltration of brine into the flux from a liq. discharge port 14a is detected, sampling cocks 26a-26c provided at the sampling port 18 communicating with the transfer port 16 of each partition plate 5a through a communicating passage 19 are successively opened, and the flux in each block is sampled and analyzed. The filter plate of the abnormal block is disassembled and repaired.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is a method in which a membrane consisting of a semi-permeable membrane such as an ultra-i filtration membrane or a reverse osmosis membrane is stretched on the surface of a substrate having a liquid collection part. A permeated liquid (hereinafter referred to as "flux") obtained in the liquid collection part by passing through the Shodo membrane by flowing the stock liquid into the liquid passage gap formed on the surface side of the filter membrane, which constitutes the filter plate, and This invention relates to a flat membrane separation device that separates a concentrated liquid that does not pass through a filter membrane (hereinafter referred to as "brine").

(Prior art) As shown in Fig. 10.11, such a flat membrane type separator consists of a horizontal support member installed between a fixed end plate 2 and a fixed support column 3 that face each other in the front and back on a bed 1. 1 that can be moved along 4
A plurality of movable end plates 2a are suspended, and a plurality of (three in this case) partition plates 5a, 5a, 5b, between the fixed end plate 2 and the partition plate 5a, between each partition plate, and between the partition plates 5a
and the movable end plate 2a, each filter plate 6...
・is laminated with a gasket q interposed therebetween to form a plurality of laminates (hereinafter referred to as "blocks") I-...IV, suspended, and passed between, for example, the fixed end plate 2 and the movable end plate 2a. By tightening the bolts 7 and nuts 7a, the block IV is compressed by both end plates.

Each door plate 6 is constructed by forming a liquid collection part 8 by making the inner side of the periphery of a substrate 6a made of hard plastic uneven and forming a liquid collection part 8, and by extending a slide 9 on the liquid collection part 8.

The filter plate 6 has two types of openings, upper and lower, namely an upper opening 1.
0 and a lower opening 11 are opened, and by stacking these furnace plates, an upper liquid passage 10a and a lower liquid passage 11a are formed.
is formed.

Each filter plate 6 has a handling port 12 for extracting the flux obtained in the liquid collection part 8 after passing through the slider 9 to the outside from the end face of the filter plate, and this outlet port 12 is connected to the header pipe 12b via a pipe 12a. ing.

Each partition plate 5a between the first block (2) and the second block (2) and between the third block (4) and the fourth block IV is provided with a lower relay port 11b that communicates with the lower liquid passage 11a of each block. An upper relay port 10b communicating with the upper liquid passage 10a is provided in the partition plate 5b between the second block (2) and the third block (2). In addition, the movable end plate 2a has a fourth
A drain port 14 communicating with the upper liquid passage 10a of block IV
is provided.

Liquid passage port 13 of the fixed end plate 2 of the membrane separator having the above configuration
When the stock solution is supplied to the upper liquid passage 10a of the first block (2), the stock solution flows in a downward flow through the liquid passage gaps 9a of all the filter plates 6 of the first block (2) in contact with the slides 9. Edge slip 9
The flux obtained in the liquid collection part 8 passes through the pipe 12a from the handling port 12 of the filter plate 6 to the header pipe 12b.
are collected in.

On the other hand, the brine that has not passed through the slide 9 is transferred from the lower liquid passage 11a of the first block (2) to the lower liquid passage of the second block (2) via the lower relay port 11b of the partition plate 5a between it and the second block (2). 11a, flows in an upward flow through the liquid passage gaps 9a of all the filter plates of the second block H in contact with the membrane 9,
At this time, the flux that has passed through the membrane 9 and is applied to the liquid collecting section 8 is discharged from the rear outlet 12.

The unpermeated brine passes from the upper liquid passage 10a of the second block (2) to the upper liquid passage 10a of the third block (2) through the upper relay port 10b of the partition plate 5b between it and the third block (2).
This time, it flows downward through the liquid passage gaps 9a of all the furnace plates of the third block (2).

The entire liquid flow described above is indicated by arrows in FIG. In other words, the liquid that flows upward (or downward) through the liquid passage gap of the previous block through the liquid passage gap of the next stage block contacts the filter membrane and flows downward (in the opposite direction). In this way, the liquid flows repeatedly in a meandering manner in the vertical direction for each block, and flows through the liquid passage gap 10 in the final stage (here, the fourth block IV) in contact with the filter membrane 9. The brine that has not passed through is discharged from the drain port 14 of the movable end plate. On the other hand, Blacks have 1 door board 6 to 12 pipes each.
a to the header pipe 12b.

(Problems to be Solved by the Invention) However, since the flux in the conventional flat membrane separator described above is discharged from each door plate, abnormalities such as mixing of the stock solution into the permeate occur. If this occurred, it was necessary to check all filter plates.

For example, when a flat membrane separator is assembled by stacking 100 filter plates, if the membrane of one of the filter plates is damaged and the raw solution is mixed into the permeate. However, in order to extract the damaged filter plate, it is necessary to sample and analyze the permeate from all the filter plates, which has the disadvantage that it takes a long time to check.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a structure in which a plurality of filter plates formed by extending a filter membrane on a substrate having a liquid collection part are laminated in the front and back direction. constructing a body, interposing a partition plate between the fixed end plate and the movable end plate, and compressing the laminate in multiple stages in the front and back direction, and flowing the stock solution into the liquid passage gap on the filter membrane surface of each of the filter plates. In a flat membrane separator that separates the permeated liquid that has passed through the Seven membrane membrane and the concentrated liquid that has not passed through the Seven membrane membrane, when the sliding plates are stacked on the filter plate, the undiluted solution or concentrated liquid is separated in the stacking direction. An opening forming a liquid passage and a permeated liquid opening forming a permeated liquid passage are provided, and a relay port and a permeated liquid relay port corresponding to the concentrated liquid passage and the permeated liquid passage are provided in the partition plate. The present invention is characterized in that the liquid relay port is provided with a communication path for sampling the permeate that reaches the end surface of the partition plate from the permeate passage.

(Function) The present invention has the above configuration, and the flux of each block is sampled from the permeate relay port provided in each partition plate.

(Description of Embodiments) Hereinafter, one embodiment of the flat membrane type separation apparatus according to the present invention will be described with reference to the accompanying drawings. In this example, components having the same functions as those of the conventional example described above are given the same reference numerals.
The explanation for that part will be omitted since it will be redundant.

FIG. 1 is a side view of the entire flat membrane type separator, and FIG. 2 is a cross-sectional view of a portion of FIG. 1 on an enlarged scale.

In particular, FIG. 1 shows the overall flow of liquid in the apparatus of the present invention, and FIG. 2 shows the flow of liquid in each filter plate by arrows. Note that among these arrows, the flow shown by the solid line is the flow of the stock solution or brine, while the flow shown by the broken line is the flow of the flux.

In order to obtain the above-mentioned flow, the stock solution supply port 13 is opened at the center of the fixed end plate 2, and the movable end plate 2a is opened at the center of the fixed end plate 2.
A brine drain port 14 is provided in the center of the movable end plate 2a, and a flux drain port 14a is provided roughly in the center and lower portion of the movable end plate 2a.

FIG. 3 shows a schematic front view of the filter plate 6 constituting each block. That is, the sliding plate 6 is formed into an uneven shape on the inner side of the periphery of the substrate 6a to form a liquid collecting portion 8, and a sliding plate 9 having approximately the same size as the substrate 6a is stretched over the liquid collecting portion 8 to form a filter element a. , and a window 6' having the same periphery as the filter element a.
It is formed by fitting into a frame having a.

In addition to upper openings 10.10 and lower openings 11.11 provided at both ends of the sliding plate 6 corresponding to each filtering element a, there is also an opening corresponding to each filtering element a in the center, that is, the central part. In addition to the opening 15.15, there are permeate ports 16.16 at the center of the center and at the center of the bottom.
has been established.

1st block quest, 2nd block ■ and 3rd block ■
As shown in FIG. 4, the partition plate 5a that partitions the fourth block IV and the fourth block Relay ports 10a, 10a and lower relay ports 11b, 11b are provided, and a permeate port 16a is provided at a position corresponding to the permeate port 16 of the filter plate 6.

Partition plate 5 that separates the second block ■ and the third block IV
As shown in FIG. 5, in FIG.
Central relay ports 15a, 15a are provided at positions corresponding to 15, and a permeated liquid relay port 16a is provided at positions corresponding to the permeated liquid port 16 of the filter plate 6.

Each permeate relay port 16 provided on the partition plates 5a and 5b
A, 16a is provided with a communication path 19 that communicates with a sampling port 18 provided in a lower positioning piece 17, which is one of the end faces of the partition plates 5a, 5b.

The communication path 19 has a permeate relay port 1 on one side of the partition plates 5a and 5b.
A groove 20 reaching the lower positioning piece 17 from 6a, 16a is provided, a backing 21 having a grooved groove is inserted into this groove 20, and a screw hole 22 reaching the groove 20 is provided in the lower positioning piece 17. (See Figures 6 and 7).

Filter plate 6 and partition plates 5a and 5b configured as above
When pressed between the fixed end plate 2 and the movable end plate 2a, the gasket Q creates a space between the fixed end plate 2 and the filter plate 6, between the sliding plate 6 and the other furnace plates 6 in front and behind it, Filter plate 6 and partition plate 5
a or 5b and between the sliding plate 6 and the movable end plate 2a.

On the other hand, by stacking each filter plate 6, a central liquid passage 15b is formed by the valley of the central opening 15 of the filter plate 6, and
The upper opening 10 and lower opening 11 of the filter plate 6 form an upper liquid passage 10a and a lower liquid passage 11a, respectively.
Roughly permeated liquid port 16°16 and permeated liquid relay port 15a,
16a forms permeate passages 16b, 16b.

Therefore, the stock solution supplied from the stock solution supply port 13 of the fixed end plate 2 enters the central liquid passage 15b of the first block, and is divided vertically through the liquid passage gaps 9a... to the upper liquid passage 15.
a and flows toward the lower liquid passage 11a.

The flux obtained by passing through the furnace belly 9 during this liquid passage is
The liquid reaches the liquid collecting portion 8 of each furnace plate 6, and is taken out from the liquid drain port 14a via the permeated liquid passage 16b.

Note that the flux is discharged from the liquid collecting part 8 to the permeated liquid port 16 at the eighth and ninth points to prevent brine from being mixed into the flux.
It is configured as shown in the figure.

That is, one corner of the substrate 6a is cut out, and a rubber backing 23 of the same size as this notched portion is adhered to the substrate 6a.
This is done by passing a pipe 24 through the rubber backing 23 from the permeate port 16. A through hole 25 communicating with the substrate 6a is provided in the frame and the rubber backing 23.

The brine in the upper and lower liquid passages 10a, 11a passes through the lower relay ports 10a, 1Oa and the lower relay ports 11a, 11a of the partition plate 5a, which are provided corresponding to both liquid passages 10a, lla, to the second Upper liquid passage 10 of block ■
a, is supplied to the lower liquid passage 11a, and both of these liquid passages 10
A and 11a, the liquid flows toward the central opening 15 through the liquid passage gap 9a of the second block (2).

During this liquid passage, flux is obtained in the liquid collecting section 8, as in the case of the first block (2), and this flux is discharged from there into the permeated liquid passage 16b.

The next supply of the stock solution for the third block is carried out through the brine in the central liquid passage port 15b of the second block (2) through the central relay port 15a of the partition plate 5b between the second block (2) and the third block (2). This is carried out by supplying the liquid to the central liquid passage 15b of the third block (2).

As described above, the flow direction of the stock solution or brine in the flat membrane separator is such that the odd-numbered blocks and the even-numbered blocks flow in the same direction, and the flux is
It is obtained from the permeate passage 16b formed when the door plate 6 and the partition plates 5a, 5b are stacked. Moreover, the flux in the permeate passage 16b flows from the first block toward the fourth block IV, from the stock solution supply side to the brine discharge side.

Therefore, the sampling port 18 of each partition plate 5a, 5b
By opening the sampling cocks 26a to 26G provided in the blocks in this order and sampling, the state of the flux in each block A to Ivk can be checked.

For example, if an abnormality is detected due to brine being mixed into the 7 lux from the drain port 14a, first sample it from the sampling cock 26a provided on the partition plate 5a between the first block 1 and the second block 1. analyse. As a result, if there is an abnormality, it is found that one of the furnace plates constituting the first block is in an abnormal state, and in this case, the filter plate of this block can be disassembled and repaired.

However, if there is no abnormality in the sampling from the sampling cock 26a, samples are sequentially sampled from the sampling cocks 26b and 26C according to the flux flow and analyzed.

If there is no abnormality in the sampling liquids from all the sampling cocks 26a to 26G, there is an abnormality in the last fourth block Iv, and this block is disassembled and repaired.

As described above, in this embodiment, a permeate relay port is provided on the partition plate provided between each block, and the configuration is such that sampling can be performed from this port.If an abnormality occurs in the flux, a permeate relay port is provided on each partition plate. By sampling and analyzing the sampled cock, it is possible to easily detect blocks where an abnormality has occurred. therefore,
Since only the abnormal block needs to be disassembled and repaired, abnormal filter plates can be extracted more quickly than in the past, where abnormal furnace plates were detected by sampling from all filter plates. can.

In the above-described embodiment, the number of blocks is four, but this can be increased to ten, etc., depending on the processing capacity of the stock solution.

Further, although the two-door plate and the partition plate have a central opening and a central relay port, they may be replaced with a filter plate and a partition plate having openings at the upper and lower portions as in the past.

(Effects of the Invention) In the present invention, a permeate relay port is provided in the partition plate provided between each block, and sampling is possible from this port. Therefore, when an abnormality occurs in the flux, the permeate relay port is provided in each partition plate. By sampling and analyzing the flux from the sampling cock, abnormal blocks can be easily detected. therefore,
Since all the filter plates that make up the block need to be dismantled and repaired, abnormal filter plates can be detected more quickly than in the past, where abnormal filter plates were detected by sampling from all filter plates. Therefore, there are effects such as being able to significantly shorten repair time.

[Brief explanation of the drawing]

Figures 1 to 9 show an embodiment of the flat membrane separation device of the present invention, with Figure 1 being a side view of the whole, and Figure 2 being a
Figure 3 is a front view showing the schematic structure of the furnace plate, Figures 4 and 5 are front views of the partition plate, and Figure 6 is an enlarged cross section taken along the line Vl-Vl in Figure 4. 7 is an enlarged sectional view taken along the line VI-VH in FIG. 4, FIG. 8 is a detailed view of section A in FIG. 3, FIG. 9 is a sectional view taken along the line IX-IX in FIG. FIG. 11 is a side view of the entire conventional device and a sectional view showing the separated state of FIG. 10. 2・・・・・・・・・・・・・・・Fixed end plate 2a
・・・・・・・・・・・・Movable end plates 5a, 5b・
...Partition plate 6...Filter plate 6a...
・・・・・・・・・・・・Board 8・・・・・・・・・
・・・・・・・・・Liquid collection part 9・・・・・・・・・・・・
・・・・・・i door membrane 9a・・・・・・・・・・・・・・・
・Liquid passage gap 10・・・・・・・・・・・・・・・・・・
Upper opening 10a...... Upper liquid passage 10b... Upper relay port 11...・・・・・・・・・Lower opening 1
1a......Lower liquid passage 11b
・・・・・・・・・・・・Lower relay port 15...
......Central opening 15a...
・・・・・・・・・・・・Central relay port 15b...
......Central liquid passage 16...
......... Permeated liquid port 16a...
...... Permeated liquid relay port 16b...
......Permeate passage 18...
......Sampling port 19...
.........Communication path 20...
・・・・・・・・・Groove 21・・・・・・・・・・・・・・・
...Backing 26a to 26G...Sampling cock Patent applicant Aqua Renaissance Technology Research Association Representative Patent attorney Kazu 1) Figure 3 of the established rules
Figure 4 Figure 8 Figure 9

Claims (1)

[Claims] 1. Construct a laminate by stacking a plurality of filter plates in the front and back direction, each of which is formed by stretching a filtration membrane on a substrate having a liquid collection part, and combine the laminate with a fixed end plate and a movable end plate. By interposing a partition plate between the plates and applying multiple stages of pressure in the front and back direction, and flowing the stock solution through the liquid passage gap on the filter membrane surface of each of the above-mentioned filter plates, the permeate that has passed through the filter membrane and the concentration that has not passed through the filter membrane can be separated. In the flat membrane separator for separating liquid and liquid, the filter plate has an opening that forms an undiluted liquid or concentrated liquid passage in the stacking direction and a permeate opening that forms a permeate passage when the filter plates are stacked. The partition plate is provided with a relay port and a permeate relay port corresponding to the concentrate passage and the permeate passage, and the permeate relay port is provided with a permeate passage from the permeate passage to the end face of the partition plate. A flat membrane separation device characterized by having a communication path for sampling a liquid.