JPH04893Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a ceramic filter used in a membrane separation device to separate a fluid from a specific component in the fluid by ultrafiltration or precision filtration. It is something.

<Prior art and its problems> Conventionally, ceramic filters have been integrated by fixing both ends of a group of ceramic tubular separation membranes to a fixing tube plate via O-rings or adhesives.

However, in the case of such a conventional example, there are the following problems.

When opening the fitting ports or communication ports for fitting the tubular separation membranes to the fixing tube plate, it is difficult to open the fitting ports close to each other, and there is a limit to the number of fitting ports, so it is difficult to open the fitting ports or communication ports to fit the tubular separation membranes to the fixing tube sheet. Since it cannot be integrated compactly and the membrane area per unit volume cannot be increased when installed in a membrane separation device, improvement in filtration efficiency cannot be expected.

Therefore, in order to solve the above-mentioned conventional problem, the one disclosed in Japanese Patent Application Laid-open No. 129020/1983 has been developed.

As shown in FIG. 7, this improved example has a porous honeycomb structure 100 having a large number of through holes 101 that have a large membrane area per unit volume and are easy to modularize, with through holes sharing a partition wall 101' on at least one side. 101 and 101, one end of one through hole 101 and the other end of the other through hole 101 are sealed, respectively, so that one end becomes a stock solution flow path 102 and the other end becomes a permeate flow path 103. However,
In the case of such an improved example, the stock solution flow path 102 has a structure in which one end, that is, the outlet end, is sealed, so a cross-flow filtration method cannot be adopted and a total filtration method is used, so that components whose permeation is restricted are filtered through the membrane surface. The gelation, adhesion, and growth of the gel layer rapidly attenuates the permeation flux, leading to a rapid decrease in filtration efficiency.In addition, when removing the gel layer by backflow, one end of the stock solution flow path 102 is Since the opening is closed, there is a problem in that the gel layer attached to the partition wall near the sealed end cannot be removed reliably.

<Problems to be solved by this invention> The problems to be solved by this invention are cross-flow filtration with high filtration efficiency using a porous honeycomb structure with a large membrane area per unit volume and easy to modularize. To provide a ceramic filter which can be realized with a simple structure when the method is adopted and whose filtration performance can be easily recovered.

<Means for solving the problem> The technical means taken to solve the above problem is to provide a fixing plate at both ends of a porous honeycomb structure having a large number of through holes, and to the fixing plate, Among adjacent through holes that share at least one partition wall in the porous honeycomb structure, a communicating flow path is provided in a portion facing one of the through holes, and a recess is provided in a portion facing the other through hole. The through hole and the communication channel constitute a raw solution flow path, and the through hole and the recess constitute a permeate chamber, and each of the permeate chambers is connected to the outer wall of the fixed plate through a shared partition wall. The permeate discharge channel is formed by arranging the recesses in a continuous manner and forming communication holes in the partition walls between the recesses constituting the permeate chamber and the outer wall of the fixing plate.

<Function> The effect of the technical means of the present invention is to allow the undiluted solution to flow through the undiluted solution flow path, which is composed of the through holes in the porous honeycomb structure and the communication channels of the fixing plate, while the permeated liquid flows through the undiluted solution. The permeated liquid is allowed to flow into the chamber formed by the adjacent through hole and the recess of the fixed plate through the partition wall of the channel, and the permeated liquid is formed by the communication hole opened in the partition wall between the recesses and the outer wall of the fixed plate. Discharge to the outside from the liquid discharge channel.

During backwashing, washing water is introduced from the permeate discharge channel to peel off the gel layer adhering to the partition wall forming the stock solution channel, and is discharged from both open ends.

<Example> Next, embodiments of the present invention will be described with reference to the drawings.

The porous honeycomb structure A is a porous body made of ceramic having a large number of through holes 1 of a desired shape, and having partition walls 1' having an average pore diameter of 0.01 to 10 μm and a porosity of 10 to 60%. A stock solution flow path 2, a permeate chamber 3, and a permeate discharge flow path 4 are respectively formed inside by the fixing plates B disposed at both ends.

The fixing plate B is a plate-like member formed using materials such as ceramics, glass, and synthetic resin, and is disposed at both ends of the porous honeycomb structure A with gaskets 9 interposed therebetween. Honeycomb structure A
Among the adjacent through holes 1 and 1 sharing at least one side of the partition wall 1', a communication channel 6 is formed in a portion facing one of the through holes 1, and a recess is formed in a portion facing the other through hole 1. By recessing the through-hole 1 and its communication flow path 6, the through-hole 1 and its communication flow path 6 form a stock solution flow path 2, and the through-hole 1 and the recess 5 form a permeated liquid chamber 3.

As described above, the stock solution flow path 2 is composed of the adjacent through hole 1 that shares the partition wall 1' of the permeated liquid chamber 3, and the communication flow path 6 formed in the fixed plate B, and the liquid flows in from one opening end. By filtering the stock solution through the partition wall 1' and passing the permeate into the permeate chamber 3, concentrated water is discharged from the other open end.

The permeated liquid chamber 3 is composed of a through hole 1 and a recess 5 formed in a fixing plate B, which share the partition wall 3 of the stock solution flow path 2 and are adjacent to each other. The honeycomb structure A is arranged so as to communicate with the outer wall 7 of the honeycomb structure A, and the internal permeate is discharged to the outside via the permeate discharge channel 4.

The arrangement pattern of the permeate chamber 3 is a checkerboard pattern as shown in Fig. 2, an L-shaped pattern as shown in Fig. 4, a row pattern as shown in Fig. 5, etc. It is arranged so as to be continuous up to the outer wall 7.

The permeate discharge channel 4 is formed by opening a communication hole 8 in the partition wall 5' shared by the recesses 5 forming a part of the permeate chamber 3 arranged in the pattern, and in the outer wall 7 of the fixed plate B. Twist and form.

Thus, the ceramic filter in this embodiment has a connecting flange 1 at the opening edge as shown in the figure.
A packing 15 is interposed between supports 14, 14 in a pressure-resistant vessel 13, which is constructed by connecting a cylindrical body 12 having projecting portions 1, 11 via their connecting flanges 11, 11.

In the case of such an embodiment, the fixing plate B and the porous honeycomb structure A can be disassembled by disassembling the pressure vessel 13, and even when assembled into the pressure vessel 13, the fixing plate B can be removed from the packing 9. The support body 14,1 is in contact with the porous honeycomb structure A through the support body 14,1.
Since it is only necessary to interpose between the four parts, there is an advantage that assembly is easy.

The fixing plate B is not limited to a type in which the porous honeycomb structure A is brought into contact with the porous honeycomb structure A through the packing 9, but may also be integrated with the porous honeycomb structure A through an adhesive or ceramic slurry. Further, the shape and number of permeate discharge channels 4 are determined in relation to the permeation performance of the partition wall (membrane).

<Effects of the invention> Since the present invention is constructed as described above, it is possible to achieve high membrane permeation performance by realizing a cross-flow filtration system using a honeycomb structure that has a large membrane area per unit volume and is easy to modularize. Can be granted.
Moreover, since the stock solution channel is composed of through holes, even if it becomes clogged, it can be easily restored to its initial membrane permeation performance by backwashing or the like. Furthermore, since it is sufficient to form recesses and communication holes in the fixing plates provided at both ends without modifying the porous honeycomb structure, the structure is not complicated and can be easily formed.

Thus, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of the ceramic filter of the present invention, and FIG. 1 is a front center vertical sectional view, and FIG. 2 is a 2-
2 is a sectional view with a part cut away, Fig. 3 is a 3-3 sectional view, Figs. 4 and 5 are sectional views taken along line 2-2, showing other embodiments, and Fig. 6 is a state in use. FIG. 7 is a partially enlarged sectional view of the main part of the conventional example. In the figure, A... porous honeycomb structure, 1...
...through hole, B...fixing plate, 1'...partition wall of through hole,
2... Raw solution channel, 4... Permeated liquid discharge channel, 5...
Recessed portion, 5'... Wall of recessed portion, 6... Communication channel, 3
...Permeated liquid chamber, 7... Outer wall of the fixed plate, 8... Communication hole, 3'... Partition wall of the permeated liquid chamber.

Claims (1)

[Scope of utility model registration request] A fixing plate is provided at both ends of a porous honeycomb structure having a large number of through holes, and the fixing plate includes one of the adjacent through holes that share a partition wall on at least one side in the porous honeycomb structure. A communication channel is provided in the part facing the through hole, and a recess is provided in the part facing the other through hole, and the through hole and the communication flow path constitute a stock solution flow path, and the through hole and the recess allow the permeation. Each of the permeated liquid chambers is arranged in a continuous manner to the outer wall of the porous honeycomb structure via a shared partition wall, and the recesses forming the permeated liquid chamber are connected to each other between the partition wall and the fixing plate. A ceramic filter that has communication holes in its outer wall to form a permeate discharge channel leading to the outside.