JPS6344901A - Filter plate for plane membrane device - Google Patents

Abstract

PURPOSE:To flow raw liquid in a zigzag manner by means of a single filter plate by providing a liquid feed port and a drain port of concentrate separated by a removable partition piece at the ends of liquid collecting sections on both faces of filter plate and also providing a couple of liquid-through holes at both ends of the liquid collecting sections. CONSTITUTION:A step face to provide a filter membrane 8' and a recessed face 21 on the same level on a filter plate on which partition plates 15 and 17 are formed integrally, removable easily by grinders or the like, and a liquid feed port 16 and a liquid drain port 18 are opened at the both ends of recessed face 21, liquid-through holes 19 and 20 being provided at the upper part and the lower part. Said filter plate is divided into three; the first part is used for liquid feeding by removing a partition plate 15 and closing the other through- holes 19 and 20, while the second part is used for draining by removing a partition plate 17 and closing all through-holes 19 and 20, and the third part located between the plates of feeding and draining works for closing through-holes 19 and 20 alternatively. Thus, a single filter plate can flow raw liquid through spaces between each of all filter plates constituting blocks, in zigzag manner.

Description

Detailed Description of the Invention (Industrial Field of Application) This invention has a liquid collection part on which a membrane such as a UF membrane or an RO membrane is stretched, and a liquid passage gap on both sides of the membrane surface. A plurality of blocks are stacked in a row in the front and back direction facing each other with a liquid passage gap sandwiched between the front and rear end plates, and the stock solution is allowed to flow through the liquid passage gap in contact with a filter membrane. This invention relates to a plate for a flat membrane device that performs solid-liquid separation in the same manner as a filter press, for separating a stock solution into a filtrate that has passed through a filtration membrane and a concentrated solution that has not passed through a filter membrane.

(Prior Art) Such a flat membrane device is known from Japanese Patent Publication No. 52-10113. As shown in Figures 22 and 23, this conventional device is movable along a horizontal support member 4 installed between a fixed end plate 2 and a fixed support plate 3 which are opposed in the front and back on the bed l. The end plate 2' and one or more partition plates 5, here three partition plates 5... and: between the fixed end plate 2 and the partition plate, between the partition plate set 4, and between the partition plate and the movable end plate. Board 6 for multiple sheets by positioning
For example, by suspending the fixed end plate 2 and the movable end plate 2' and tightening the bolt 7 with the nut 7', the partition plate 5... Furnace plate 6・
. . . Block I . . . ■ is squeezed.

On the front and rear surfaces of each furnace plate 6, a washboard-like liquid collecting recess 8 is formed by recessing two steps inside the peripheral edge made of a gasket, and the four liquid collecting parts 8 are covered all around the first step. A membrane 8' is stretched to form a liquid collection part 9, and liquid passage ports 10 and 11 are opened at the upper and lower parts of this stage, and each block I, II, m
, IV, the upper liquid passage ports IO and the lower liquid passage ports 11 of the plurality of furnace plates 6 are connected in series with each liquid passage gap 9' between the opposing filter plates. Each furnace plate 6 has an extraction hole 12 through which the liquid obtained in the liquid collection recess 8 after passing through the furnace equipment 8' is extracted from the periphery of the filter plate.

To perform the separation, a pump is used to supply the undiluted solution to the liquid supply port 13 on the fixed end plate 2, which communicates with the upper liquid passage port 10 of the first block I, and between the first block I and the second block ■. Each partition plate between the third block (■) and the fourth block (■) has a lower relay port 11' that communicates with the lower liquid passage port 11 of each block. The partition plate between them is equipped with an upper relay port 10' that communicates with the upper liquid passage port 10, and the movable end plate 2' has a liquid drain port that communicates with the upper liquid passage port IO of the fourth block. 14 will be provided.

As a result, the stock solution supplied from the liquid supply port 13 of the fixed end plate 2 to the continuous upper liquid passage port IO of the first block passes through the liquid passage gaps 9' of all the plates of the first block to the filter membrane. It contacts and flows in a downward flow, and at that time, it passes through the furnace equipment and enters the liquid collection recess 8.
The furnace liquid obtained in the above is discharged from the respective extraction holes 12, and the stock liquid that has not passed through the furnace equipment is discharged from the lower relay port 11' of the partition plate between the lower liquid passage port 11 of the first block and the second block. It flows into the series of lower liquid passage ports 11 of the second block, contacts the filter membrane through the liquid passage gaps 9' of all the plates of the second block, and flows in an upward flow, and at this time, The furnace liquid that has passed through the furnace equipment and obtained in the liquid collection recess is discharged to the outside of the furnace plate through the extraction hole 12, and the stock liquid that has not passed through is drained between the upper liquid passage port of the second block and the third block. It flows into the series of upper liquid passage ports 10 of the third block through the upper relay port lO' of the partition plate,
This time, the liquid flows downward through the gaps 9 in all the plates of the third block.
' flows through the membrane in contact with the filter membrane.

In this way, the liquid that flows in an upward flow (or downward flow) through each liquid passage gap in the previous block in contact with the filter membrane contacts the filter membrane in the liquid passage gap in the next stage block. The liquid flows in the opposite direction (downward flow) (or upward flow), repeats this meandering flow in the vertical direction for each block, and contacts the filter membrane through the liquid passage gap in the final stage, here the fourth block. The concentrated liquid that has not passed through the membrane is discharged from the drain port 14 of the movable end plate.

(Problems to be Solved by the Invention) By the way, in such membrane separation, the liquid may not flow at a constant flow rate through the liquid passage gap or a concentration distribution may occur on the membrane surface.
It has the property of decreasing the yield (flux) of the liquid when it passes through the furnace equipment.

In the conventional example above, a block is constructed by stacking multiple plates in a row in the front-rear direction, so the amount of stock solution required to flow through the liquid passage gap of one plate in contact with the filtration membrane to obtain the required flow rate. Q, if 10 plates or one block is configured, it is necessary to supply the raw solution to the supply port 13 with a pump with a large capacity of 10XQ = IOQ, which increases equipment costs and requires running time. The cost will also be higher.

Furthermore, a large amount of the liquid flowing into the upper or lower liquid passage ports 1o constituting each one block or connected in a series of plates is supplied to the liquid passage gap on the downstream side, and is supplied to the liquid passage gap on the upstream side. The amount tends to decrease compared to the downstream side, and the flow velocity in the liquid passage gap on the upstream side becomes smaller, which also causes the problem that the upstream side membrane is easily clogged with solids in the liquid. be.

(Means for Solving the Problems) Therefore, the present invention provides a solution supply port for flowing the raw solution separated by a removable partition piece at one end of the liquid collecting section where the furnace equipment is extended, and a liquid supply port for flowing the raw solution at the other end. Separated by a removable partition piece, a drain port was provided for the concentrated liquid to flow through, and a pair of closable liquid passage holes were provided at one end and the other end of the liquid collecting section on both sides, respectively, through which the stock liquid could pass through. Features (effects): By this, one of the plates can be stacked in a line in the front and rear direction to form a block, or one of the plates can be used to cut out the partition piece between the liquid collection part and the liquid supply port, and Close all the liquid passage holes in the liquid collection area for liquid supply, and remove the partition piece between the liquid collection part and the liquid drainage port on the other piece, and close all the liquid passage holes in the liquid collection part. The other plate located between the furnace plates for supplying liquid and for draining liquid has a liquid passage hole on one end and a liquid passage hole on the other end closed in an alternating direction, thus creating a single furnace plate. The undiluted solution can be made to flow in a meandering manner by sequentially changing direction in one direction and the other direction through the liquid passage gaps of all the plates constituting the block.

(Example) In each of the illustrated embodiments, the same components as those of the conventional example shown in FIGS. 22 and 23 are denoted by the same reference numerals. Furthermore, for convenience, each embodiment will be described with the front and back as left and right.

Figure 1.2 shows an embodiment of the reactor plate according to the present invention.The reactor plate has a rectangular shape elongated in the vertical direction like the conventional example described above, and the plates [8] on both sides of the plate are rectangular in shape. \liquid supply port 1 separated by an upper partition piece 15 on the - end of the liquid collection part 8 where the
Similarly, a liquid drain port 18 is provided under the lower end of the plate, separated by a lower partition piece 17, and four liquid collecting portions 8.6 are provided on both sides of the plate.
8 is opened at both ends, and an upper liquid passage hole 19 is opened in a part thereof, and a lower liquid passage hole 20 is opened in a lower part thereof.

In this embodiment, there are concave surfaces 21 on the same level as the stepped surfaces on which the membrane 8' is stretched above each upper partition piece 15 and below the F section partition piece 17.
The liquid supply port 16 and the liquid drain port 18 are provided with both ends opened in the concave surface, or, for example, the lower edge of the liquid supply port 16 is placed along the upper edge of the upper partition piece 15, or If the upper edge of the drain port 18 is placed along the lower edge of the piece 17, this concave surface 21 can be omitted.

In addition, each of the upper and lower partition pieces 15 and 17 may be easily removable with a clinter, or may be made of a substrate made of hard vinyl chloride or the like that constitutes the furnace plate with thin fragile parts 15' and 17' to facilitate resection. It is preferable to mold it integrally with 6'.

Figure 3 shows six types of furnace plates 6a, 6b, etc. from the above plates.
6f is made, of which 4 types of blocks 6b, 6c, 6d, and 6e are made into 4 sets I, n, m, rv, between the 1st set and the ■group, and between the 1st set and the ■group. Nika board 6a
A flat membrane device is shown in which the oven plate 6f is sandwiched between the set (1) and the set (1), and the entire oven plate is pressed between the fixed end plate 2 and the movable end plate 2'.

5 to 10 are front views of each of the six furnace plates, the left half shows the left side of each oven plate in FIG. 3, the right side shows the right side, and X indicates a closed liquid passage hole.

The furnace plate 6a is for liquid supply, and as shown in FIG. 5, the upper partition pieces 15 are removed from both the left and right sides, and the lower liquid passage holes 19 and 20 are also closed. To close each liquid passage hole, as shown in Fig. 4, apply adhesive to a blind plate 22 or plug 23 that fits perfectly in the hole, push it in, and fix. Use one that does not have holes in the position.

For the furnace plates 6b of group ■ and group ■ adjacent to this furnace plate 6a for liquid supply, only the upper partition piece on the left side facing the furnace plate 6a is removed, and the liquid passage hole is closed in the upper part 19 and opened in the lower part 20. . To open the liquid passage holes, as shown in Figure 4, make holes of the same size in the parts corresponding to the liquid passage holes in the membrane on both sides, and apply adhesive into each liquid passage hole from the hole in the furnace tube. The eyelet-shaped crimp Z4 is pushed in and fixed to prevent the raw liquid from injecting into the four liquid collection parts through the holes in the furnace cylinder.

Furnace plates 6b adjacent to one set and one set of liquid supply plates 6a may be formed in the same manner as described above, and their orientations may be reversed so that the surface with the upper partition piece cut away faces the liquid supply plates.

As a result, the stock solution flowing through the series of liquid supply ports on each plate is supplied to the liquid supply plate 6a and the adjacent filter plate 6b of each set. The undiluted solution flows in a downward flow into the opposed liquid passage gaps 9' and 9' of 6a and 6b,
The filtrate that permeates through the membrane while flowing in contact with the furnace cylinder enters the four liquid collection parts 8 and is extracted from the discharge hole 12, and the stock liquid that did not permeate is passed through the lower partition pieces 17 of both plates 6a and 6b. Perhaps because the lower ends of the liquid collecting parts are closed in opposition to each other, the liquid passes through the lower liquid passage hole 20 of the plate 6b. In addition, in FIG. 3, the state in which the upper or lower partition pieces face each other and close the upper or lower end of the liquid collecting section is shown.

The plate 6c adjacent to the furnace plate 6b closes only the F section liquid passage hole 20 as shown in No. 71A, and the plate 6d adjacent to the furnace plate 6c closes only the upper liquid passage hole 19 (FIG. 8). The furnace plate 6e adjacent to the furnace plate 6d closes the lower liquid passage hole 20, and the furnace plate 6e
Cut out the lower partition piece 17 on the surface facing f (Fig. 9),
The furnace plate 6f closes the upper and lower liquid passage holes 19, 20, and the lower partition pieces 17 on both the left and right sides are cut out (FIG. 10).

As a result, the stock solution that has entered the lower liquid passage hole 20 of the furnace plate 6b contacts the filter membrane and flows upward through the liquid passage gaps 9' and 9' that are opposed to each other in the furnace plate 6b and 60, and then flows upward through the upper part of the furnace plate 6c. The liquid passes through the liquid passage hole 19 and flows downward through the liquid passage gap where the plates 6c and 6d face each other, and then passes through the lower liquid passage hole 20 of the furnace plate 6d and flows through the liquid passage gap where the furnace plates 6d and 60 face each other. The liquid flows upward, passes through the upper liquid passage hole of the furnace plate 6e, and flows downward through the liquid passage gap of the furnace plate 6e facing the end plate 2゜2' for groups ■ and ■. In this case, the concentrated liquid that has not passed through the membrane flows downward through the liquid passage gap between the furnace plates 6e and 6f, which are opposed to each other.Since there is no lower partition piece 17 that closes the lower end of the liquid passage gap, the concentrated liquid flows in a series of drains. It flows into the liquid port 18 and is discharged.

In short, in this embodiment, both sides of the furnace plate 6a for liquid supply between the 1st group and the 2nd group, the 2nd group and the 2nd group, and the adjacent furnace plate 6b.
Furnace liquid is supplied in a downward flow between the opposing surfaces of the blocks, and the raw liquid flows toward the fixed end plate for the blocks of sets 1 and ■, and towards the movable end plate for the blocks of sets ■ and ■. Solid-liquid separation is performed by meandering vertically, and the furnace plates 6 are stacked alternately.
By increasing or decreasing the numbers c and 6d, the number of plates used in one block can be arbitrarily determined.

Figure 11 shows 6g of five types of furnace plates from the original plate in Figure 1.2.
6h, 6i, 6j, and 6k were made, and 4 sets of blocks I, II, m, and IV were made with these 5 types in one set, and these were clamped between both end plates 2.2' to fix the inside of each block. This is a flat membrane device that meanderes the stock solution up and down in the same direction toward an end plate or a movable end plate.

Inside the furnace plates 6h, 6i, 6j, 6 are the aforementioned furnace plates 6b.
, 6c, 6d.

Same as 6e. Furnace plate 6g has upper and lower liquid passage holes 19.20
At the same time, the upper partition piece on the right side opposite to the left side without the upper partition piece of the furnace plate 6h (6b) and the lower partition piece on the left side are cut out.

As a result, the raw liquid flowing through the series of liquid supply ports 16 flows through the furnace plate 6g,
6h flows in a downward flow through the opposed liquid passage gaps, then flows upward through the opposed liquid passage gaps in the furnace plates 6h and 61, and flows downward in the opposed liquid passage gaps in the furnace plates 6 and 6j. The liquid flows in an upward flow through the opposed liquid passage gaps between the furnace plates 6j and 6, and finally the liquid passes through the furnace plates 6j and 6.
After flowing downward through opposed liquid passage gaps of 6 g, the concentrated liquid is discharged to a series of drain ports 18.

The furnace plate has an upper liquid passage port 16 on each side as shown in Figure 1.2.
In addition to forming one liquid collection part 8 and one lower liquid passage port 18 in a Japanese character shape, as shown in FIGS. A plurality of them, such as two, may be formed.

Also, as shown in Figures 19, 20, and 21, the partition piece 15° 17 is connected to the liquid supply port 16. In addition to surrounding the liquid drain port 18, liquid passing holes 19 and 20 may be provided between the liquid collecting recess 8 and the liquid supply port 16 and the liquid drain port 18. In this case, when cutting out the partition pieces, it is sufficient to cut out only the four parts of the fruit juice side, even if the partition pieces do not have to be removed in their entirety. The gasket 26 for sealing between the opposing filter plates is provided by adhesive bonding only to the four parts on one side of each furnace plate and the peripheral edge of the same side, so that when stacked one on top of the other, there is a gasket for the opposite plate. Make sure that the other side touches the gasket.

In addition, the above-mentioned partition pieces 15, 17, liquid supply port 16, and liquid drain port 18 are designed to be cut out or closed at necessary locations, but when integrally molding the substrate 6' by injection molding, To,
A core may be inserted into the excised or occluded area and molded to obtain several types of plates as described above. In that case,
It is advantageous that machining for excision or operation for occlusion is omitted.

Therefore, in the present invention, when the term "resectable" or "resectable" and "occlusion" are used, it should be understood that the term "resectable" or "resectable" and "occlusion" includes cases where injection molding is used as described above.

(Effects of the Invention) In the flat membrane device constituted by the filter plates of the present invention, the stock solution flows through the liquid passage gap between the plurality of opposing filter plates constituting one block while sequentially meandering or contacting the membrane. Therefore, if the amount of the stock solution to obtain the required flow rate through the liquid passage gap of one plate is Q as mentioned above, one block is 4I.
If you do tJr&, it will be the QX number regardless of the number of boards.

Therefore, for example, in the conventional example, if 10 plates or 1 block is constructed and the number of flocks is 4, the required amount of stock solution is QX
IO (number of furnace plates constituting 1 floc), whereas in the present invention, it is Q x 4 (number of flocs), making it possible to use a much smaller capacity pump while using 40 furnace plates. , both equipment costs and running costs are low.

Furthermore, since the undiluted solution flows through the liquid passage gaps in the flocs without being filtered, the liquid density of the undiluted liquid flowing through the liquid passage gaps on the upstream side decreases compared to the liquid passage gaps on the upstream side. Since the flow rate is constant, both the fji membrane on the downstream side plate and the membrane on the downstream side plate are less likely to become clogged by solids in the liquid.

Also, by cutting out the partition pieces of the pair of fti plates of rlt-・,
The flock is constructed by closing the pair of liquid passage holes to form the required ty' plate, and it is easy to manufacture since there is no need to use a foreign material such as a partition piece.

[Brief explanation of drawings]

Figure 1 is a partially sectional front view of an embodiment of the plate in the molded state, Figure 2 is a sectional view taken along the IT-II line in Figure 1, and Figure 3 is the plate in Figure 1 used. Fig. 4 is an enlarged sectional view of the part enclosed by the line ① in Fig. 3, and Figs. 11 is a schematic side view of another example of a flat membrane device constructed using the plate shown in FIG. 1, and FIGS. 12 to 16 are ll7 of FIG. - A front view of each gummy plate used in the membrane device, FIG. 17 is a front view of another embodiment of the gami plate in a molded state, and FIG. 18 is a front view of A of FIG. 17.
, a sectional view taken along line -B, FIG. 19 is a front view of yet another embodiment of the molded jf5 plate, and FIG. 20 is a sectional view taken along the line A of FIG.
21 is a sectional view taken along the line -B, FIG. 21 is a sectional view taken along the line -D of FIG.
The figure is an enlarged cross-sectional view of the - part of Fig. 22. In the figure, 2 is a fixed end plate, 2' is a movable end plate, 6 is a furnace plate, 8' is a furnace mold, and 9 is a liquid collection part of a plate. , 9' is a liquid passage gap, 15.17 is a partition piece, 1
6 is the liquid supply port, 18 is the liquid drain port, 19 and 20 are the liquid passage "1, I
, II, m, IV are 9th grade floraso using multiple boards.
゜Patent applicant: Kurrim L-gyo Co., Ltd. Figure 19

Claims (1)

[Scope of Claims] A liquid collection part with a filter membrane stretched thereon, a liquid passage gap on both sides of the surface of the filter membrane, and a plurality of membranes stacked in a line in the front and back direction, facing each other at the liquid passage gap. It consists of a block that is compressed between front and rear end plates, and the stock solution is allowed to flow through the liquid passage gap in contact with the filter membrane, thereby separating the stock solution into a filtrate that has passed through the filter membrane and a concentrated solution that has not passed through the membrane. In a filter plate for a flat membrane device, each of the liquid collecting parts on both sides has a liquid supply port separated by a removable partition piece at one end for flowing the stock liquid, and a liquid inlet at the other end separated by a partition piece that is also removable for concentration. For use in a flat membrane device, characterized in that a liquid drainage port is provided for flowing the liquid, and a pair of closable liquid passage holes are provided at one end side and the other end side of the liquid collecting portion on both sides, respectively, through which the stock liquid passes through. Filter plate.