JPH0638897B2 - Liquid separation device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a liquid separation device for ultrafiltration or microfiltration of various liquids by a semipermeable ceramic filter body.

(Prior Art) Conventionally, for ultrafiltration or microfiltration of liquids in the fields of food, medicine, chemistry, etc., membrane modules such as polymer membranes and tubular modules such as porous metal tubes and ceramic tubes have been used. A liquid separating device using is used as a filter. However, for example, Japanese Patent Publication No. 52-10113
As disclosed in Japanese Patent Publication No. 53-35552 and Japanese Patent Publication No. S53-35552, a conventional liquid separation device using a polymer membrane is inferior in heat resistance, chemical resistance, acid resistance and alkali resistance due to the characteristics of the polymer and is a polymer membrane. Has a drawback that it is easily eroded by microorganisms or scraped by particles in the liquid and is easily damaged, and it may not be used in the fields of foods, pharmaceuticals and the like that require steam sterilization at 120 to 130 ° C. Further, among those using a tubular module, as shown in Japanese Patent Publication No. 58-30305, an external pressure type in which a stock solution is supplied from the outside does not allow the solution to flow uniformly, so that the effective filtration area is reduced during use or the microorganisms are used. On the contrary, the internal pressure type that feeds the undiluted solution from the inside has a large amount of undiluted solution flow rate in order to maintain the membrane performance. However, there is a drawback that the effective filtration area is not large.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and provides heat resistance,
The present invention was completed for the purpose of providing a liquid separation device which has excellent chemical resistance and the like, does not cause microbial growth due to liquid stagnation and does not reduce the effective filtration area, and can reduce the flow rate of the stock solution and has low power cost.

(Means for Solving the Problems) The present invention is to form a space for supplying a raw solution or discharging a permeated liquid between two filter bodies made of a ceramic porous body, and to form a communication hole with the space. The present invention is characterized in that a filter unit is formed by fitting the filter unit inside a support frame having a communication hole with the outside of the filter body, and a large number of these filter units are integrally laminated.

(Example) Next, the present invention will be described in detail with reference to the illustrated example.
In the first embodiment shown in FIGS. 1 and 2, (1),
(2) is a flat plate-shaped two filter bodies made of a ceramic porous body, (3) is a spacer placed between the filter bodies (1) and (2), and (4) is a filter of these two sheets. Body (1), (2) and space (3)
Is a support frame for fitting the inside of the filter frame, and a filter unit (5) formed by inserting the filter bodies (1) and (2) into the inside of the support frame (4) as shown in the figure is a fixed-side end plate. (6) and tightening cylinder
A large number of sheets are laminated between the movable end plate (8) and the end plate (8), which are pressed by (7), and are integrated under pressure. The filter body (1) is obtained by sintering fine particles of alumina or zirconia into a plate shape having a thickness of 0.5 to 5 mm and an average pore diameter of 10Å to 2 µm. Spacer (3) is a rubber material such as natural rubber, butyl rubber, urethane rubber, etc., a sealing material such as Teflon-based, polyethylene-based, polypropylene-based synthetic resin, or a metal coated with a sealing material on both sides. It is for forming a space (9) for discharging the permeated liquid between the two filter bodies (1) and (2). It is preferable to form ribs (10) in the spacer (3) in any direction.When the ribs (10) are formed in the horizontal direction as shown in the drawing, the permeate outflow hole (11) is formed. A large number shall be formed. The support frame (4) is also made of the same sealing material as the spacer (3), and is provided on one side of the recess (12) for accommodating the two filter bodies (1), (2) and the spacer (3). It is provided with a spacer portion (14) with a rib (13). Support frame (4)
Has a stock solution supply hole (15) penetrating in the thickness direction at its lower part and a stock solution outlet hole (16) at the upper part as well, and these are communication holes (17) opening to the spacer part (14). Through one of the filter bodies (1). Further, the support frame (4) has a spacer between the filter bodies (1) and (2) on the lower surface of the central portion thereof.
A communication hole (18) communicating with the space (9) formed by (3) is provided, and the permeated liquid is taken out from the space (9) through the communication hole (18) to the outside. In this way, the filtration unit (5) in which the filter bodies (1), (2) and the packing (3) are fitted into the support frame (4) has a stock solution supply hole ( 15) and the undiluted solution outflow hole (16) form a flow path communicating with each other. Note that (19) is a stock solution supply pipe for supplying a stock solution to be filtered to the stock solution supply hole (15), and (20) is appropriately inserted in the middle when a plurality of filtration units (5) are stacked. Intermediate plates with through holes that communicate only with the stock solution outflow hole (16), (21) and (22) are normal filtration units
It is a filtration unit provided with only one filter body which is arranged outside (5) and forms a space (23) for supplying a stock solution or discharging a permeate.

FIGS. 3 and 4 show a second embodiment of the present invention, in which the filter bodies (1) and (2) are provided with ribbed concave portions (2
4) and (25), and these recesses (24) and (25) provide space.
There is almost no difference from the first embodiment except that (9) is formed and that the thin packing (3a) is used instead of the spacer (3).

FIGS. 5 and 6 show a third embodiment of the present invention, in which the space (9) between the filter bodies (1) and (2) is the inner surface of the filter bodies (1) and (2). It is the same as the second embodiment that it is formed by the recesses (24) and (25), but there is a difference in that this space (9) is used as a stock solution supply chamber. Therefore, the undiluted solution supply hole (15) and undiluted solution outflow hole (16) of the support frame (4) pass through this space (9) through the communication hole (17a) at the center of the support frame (4).
And a communication hole (18a) with the outside of the filter body (1) is formed in the spacer portion (14) of the support frame (4) so that the permeated liquid can be discharged. .

7 and 8 show a fourth embodiment of the present invention, in which a spacer (14) is provided at the center of the support frame (4),
The filter bodies (1) and (2) having the outer recesses (24) and (25) are supporting frames.
The filtration unit (5) is formed by being fitted from both sides of (4). Therefore, the space (9) between the filters (1) and (2) is formed by this spacer (14), and this space (9) is used as the permeate discharge chamber as in the first embodiment. . Further, the concave portions (24) and (25) of the filter bodies (1) and (2) will be used as the stock solution supply chamber.

In each of the above embodiments, the spacer or packing is a filter body (1),
Although provided separately from (2), these may be those adhered to the surfaces of the filter bodies (1) and (2), or those formed integrally by lining or coating. Good.
Furthermore, in addition to using a homogeneous ceramic porous body as the filter bodies (1) and (2), for example, a central layer composed of a sintered body of ceramic fine particles having an average pore diameter of 0.2 to 20 μm and a thickness of 1 to 5 mm, and an average of A multi-layered ceramic porous body having a surface layer made of a sintered body of ceramic fine particles having a pore size of 10Å to 2 µm and a thickness of 1 µm to 1 mm may be used.

(Operation) With such a structure, if the undiluted solution to be filtered is supplied from the undiluted solution supply pipe (19) of the one end plate (8) at a pressure of about 1 to 10 kg / cm ² , many undiluted solutions are obtained. The filter body (1) fitted into the inside of the support frame (4) through the undiluted solution supply holes (15) and the communication holes (17) and (17a) of the support frame (4) of each unit-stacked filtration unit (5) ), (2) between the space (9) or the space outside the filter body (1), (2), filtered by the ceramic filter body (1), (2) and only the permeate is It is taken out from the space on the opposite side through the communication holes (18) and (18a). The remaining undiluted solution passes through the communication holes (17) and (17a) to support frame.
It flows out to the undiluted solution outflow hole (16) of (4) and is supplied to another filtration unit (5) separated by the intermediate plate (20).
Since the filter body of the present invention is made of a ceramic porous body and has excellent heat resistance, it can be used in a high temperature reaction system.
Since it is possible to perform steam sterilization at 20 to 130 ° C., it can be used in the food industry and pharmaceutical factory. Furthermore, the ceramic filter body (1) has chemical resistance to organic solvents,
It has the advantage of being excellent in acid resistance, alkali resistance and microbial resistance, and can easily recover clogging by washing and exhibit a stable function for a long time. Further, in the present invention, the undiluted solution is supplied to the entire surface of the filter body through the undiluted solution supply space formed on one side of the filter body and is filtered, and the permeated solution is the permeated solution formed on the opposite side surface. Since it flows into the space for discharge, it does not cause uneven flow unlike the external pressure type tubular module, and it is possible to maintain a wide effective filtration area at all times. Therefore, there is no stagnation of liquid and the stock liquid flow rate relative to the permeation flow rate can be reduced. Therefore, the power cost is significantly lower than that of the internal pressure type tubular module. Since the ceramic filter is a fired product, some errors inevitably occur in the wall thickness.
Although there is a risk of cracking due to partial pressure when strongly tightened by (7), in the present invention, the filter body is a support frame (4).
Since the filter is fitted inside the filter, there is no possibility that the filter will be broken due to partial pressure, and the filter will have a stock solution supply hole (15) and a stock solution outlet hole.
Since it does not require drilling work such as (16), it also has an advantage that the manufacturing cost can be reduced.

(Effect of the invention) As is apparent from the above description, the present invention is superior in heat resistance, chemical resistance, acid resistance, alkali resistance, etc. as compared with the one using a polymer membrane module, and is an external pressure type tubular Compared to the one using a module, there is no reduction in effective filtration area and microbial growth due to stagnation of the liquid, and the ratio of the flow rate used for filtration to the stock solution flow rate compared to the one using an internal pressure type tubular module. Since it is high, the stock solution flow rate can be reduced and the power cost can be reduced. Furthermore, the present invention has an advantage that the filter body can be easily manufactured and that the structure is simple because it is sufficient to stack a large number of filter units. Therefore, the present invention is extremely large in that it contributes to the development of industry by eliminating the problems of the conventional liquid separation device.

[Brief description of drawings]

1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a sectional view showing a second embodiment of the present invention, and FIG. 4 is an exploded perspective view thereof. FIG. 5 shows the third of the present invention.
FIG. 6 is a cross-sectional view showing an embodiment of FIG.
FIG. 8 is a sectional view showing a fourth embodiment of the present invention, and FIG. 8 is an exploded perspective view thereof. (1), (2): Filter body, (3): Spacer, (4): Support frame,
(5): Filtration unit, (9): Space, (14): Spacer, (1
7), (17a), (18), (18a): communication holes, (24), (25): recesses.

Front page continuation (72) Inventor Hiroyuki Horikita 2-15 Takeda-cho, Mizuho-ku, Nagoya, Aichi (56) References JP-A-53-103983 (JP, A) JP-A-58-30306 (JP, A) ) JP 61-254206 (JP, A) JP 61-259706 (JP, A) JP 59-190303 (JP, U) JP 52-144243 (JP, U) JP

Claims (5)

[Claims] 1. A space (9) for forming an undiluted solution supply or a permeated solution discharge between two two filter bodies (1) and (2) made of a ceramic porous body. Communication hole with (17a), (1
8) and a communication hole (17) with the outside of the filter body (2), fitted into the inside of a support frame (4) provided with (18a) to form a filter unit (5), and this filter unit (5) A liquid separation device, characterized in that a large number of the above are integrally laminated. 2. The liquid separating apparatus according to claim 1, wherein the filter bodies (1) and (2) are sintered bodies of fine particles of alumina or zirconia. 3. The liquid according to claim 1, wherein the filter bodies (1) and (2) have a thickness of 0.5 to 5 mm and an average pore diameter of 10 Å to 2 μm. Separation device. 4. The support frame (4) is provided with a spacer portion (14) on one side thereof, and the space (9) between the filter bodies (1) and (2) is formed by the spacer (3). The liquid separating apparatus according to claim 1, 2 or 3, which is a thing. 5. The space (9) between the filter bodies (1) and (2) is a filter body (1),
The liquid separating apparatus according to claim 1, 2 or 3, which is formed by the recesses (24) and (25) formed on the side surface of (2).