JPS61259705A - Liquid separation apparatus - Google Patents

Abstract

PURPOSE:To obtain a liquid separation apparatus excellent in heat resistance and chemical resistance generating no liquid stagnation and capable of reducing the flow amount of a raw liquid, by laminating a filter unit wherein two filter bodies each comprising a ceramics porous body are inserted in a support frame so as to form a space therebetween. CONSTITUTION:A filter unit 5 is formed by inserting filter bodies 1, 2 each comprising a ceramics porous body obtained by sintering a fine particles comprising alumina in a flat plate shape in a support frame 4 in such a state that spacers 3 comprising rubber are placed between said filter bodies 1, 2 and a large number of the filter units 5 are laminated between a fixed side end plate 6 and a movable side end plate 8 and integrated under pressure. The raw liquid from a raw liquid supply pipe 19 is flowed in the spaces 9 between the filter bodies 1, 2 or the spaces outside the filter bodies 1, 2 to be filtered by the filter bodies 1, 2 and only the transmitted liquid is taken out from the spaces in the opposite side through communication ports 18. The remainder of the raw liquid is flowed out to the raw liquid outflow ports 16 of a support frame 5 through communication parts 17 to be supplied to the other filter unit 5 separated by an intermediate plate 20.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is applied to a liquid separation device that performs ultrafiltration or precision filtration of various liquids through a semi-permeable ceramic filter.

(Prior art) ``For ultrafiltration or precision filtration of liquids in the fields of food, medicine, chemistry, etc., membrane modules such as polymer membranes, porous metal tubes, and tubular tubes such as ceramic tubes have traditionally been used in the fields of food, medicine, chemistry, etc. A liquid separation device using a module as a filter is used. However, for example,
Conventional liquid separation devices using polymer membranes, such as those shown in Japanese Patent Publication No. 53-35552, have poor heat resistance, chemical resistance, acid resistance, and alkali resistance due to the characteristics of polymers, and the polymer membrane It has the disadvantage that it is easily damaged by being attacked by microorganisms or scraped by particles in the liquid, and it may not be able to be used in fields such as food and medicine that require steam sterilization at 120 to 130°C. In addition, among those using tubular modules, in the external pressure type that supplies the stock solution from the outside as shown in Japanese Patent Publication No. 58-30305, the liquid does not flow uniformly, so the effective filtration area decreases during use and microorganisms On the other hand, the internal pressure type, which supplies the stock solution from the inside, has the disadvantage that it may cause contamination, and on the other hand, the internal pressure type that supplies the stock solution from the inside requires a large flow rate of stock solution to maintain membrane performance, resulting in high power costs. The drawback is that the effective filtration area cannot be increased.

(Problems to be solved by the invention) The present invention solves these conventional problems by improving heat resistance,
It was completed with the aim of creating a liquid separation device that has excellent chemical resistance, does not cause the proliferation of microorganisms due to liquid stagnation, does not reduce the effective filtration area, can reduce the flow rate of raw liquid, and has low power costs.

(Means for Solving the Problems) The present invention provides two filter bodies made of porous ceramic bodies with a space between them for supplying a stock solution or discharging a permeate, and a communication hole with the space. The present invention is characterized in that a filtration unit is formed by being fitted into a support frame provided with a communication hole with the outside of the filtration body, and a large number of these filtration units are laminated and integrated.

(Example) Next, the present invention will be explained in detail with reference to illustrated examples.
In the first embodiment shown in FIGS. 1 and 2, +1)
, (2) is a flat plate made of porous ceramic material.
Two filter bodies, (3) is a spacer placed between the filter bodies (1) and +21, and (4) is a filter between these two pieces:
It is a support frame for fitting the bodies (1), (2) and the spacer (3) inside, and as shown in the figure, the filter bodies (1), (2) are fitted inside the support frame (4). A large number of filtration units (5) are stacked and pressurized between the end plate (6) on the fixed side and the end plate (8) on the movable side which is pressurized by the tightening cylinder (7). has been done. Filter body (11
is alumina or zirconia fine particles with a thickness of 0.5~
It is sintered into a flat plate with a diameter of 5 mm and an average pore diameter of 10 Å to 2 μm. Spacer (3) is made of natural rubber.
It is made of a sealing material such as rubber such as butyl rubber or urethane rubber, or synthetic resin such as Teflon, polyethylene, or polypropylene, or a material in which both sides of metal are coated with a sealing material. This is to form a space (9) for discharging the permeate between the filter bodies (2). It is preferable to form ribs (10) in any direction on the spacer (3), and when the ribs (10) are formed in the horizontal direction as shown in the figure, a large number of holes (11) for permeate outflow are formed. shall be kept. The support frame (4) is also made of a material with the same sealing properties as the spacer (3), and is provided on one side of the recess (12) that accommodates the two filter bodies (1), (2) and the spacer (3). It is provided with a spacer portion (14) with ribs (13). Further, the support frame (4) is provided with a stock solution supply hole (15) penetrating in the thickness direction at its lower part, and a stock solution outflow hole (16) at its upper part. ) is connected to the outside of one filter body (11) through a communication hole (17) that opens to the other filter body (11). 1 interval ゝ:l, g l'x'-sa(
3) A communication hole communicating with the space (9) formed by
) 1 (18), and the permeate is taken out from the space (9) to the outside through the communication hole (18).

Like this, 9 support frames ('1 filter body 3''1, 3') and 0 pa.
When a large number of filtration units (5) are stacked together, the filtration unit (5) with one person fitted with the
) form a flow path that communicates with each other. Note that (19) is the stock solution supply hole (15).
Stock solution supply for supplying the stock solution to be filtered into '
hmm.

The tube (20) is a stock solution outflow hole (16) that is inserted appropriately between 1 when multiple filtration units (5) are stacked.
) and chisel Intermediate plate with one continuous through hole, (2f)
, (22) is a filtration unit that is provided with only one filtration body that is placed outside the normal filtration unit (5) and forms a space (23) for supplying the stock solution or discharging the permeate.

Figures 3 and 4 show a second embodiment of the present invention □
The filter bodies (1) and (2) have ribbed recesses (24) and (25) on their inner surfaces, and a space (9) is formed by these recesses (24) and (25). Please note that the spacer (3) is replaced by a thin packing (3a).
) is used, but there is almost no difference from the first embodiment.

5 and 6 show a third embodiment of the present invention, in which the space (9) between the filter bodies (1) and (2) is
It is the same as the second embodiment in that it is formed by the recesses (24) and (25) on the inner surface of 1) and (2), but the difference is that this space (9) is used as the stock solution supply chamber. It is something to do. For this reason, the stock solution supply hole (15) and stock solution outflow hole (16) of the support frame (4) can communicate with this space (9) via the communication hole (17a) in the center of the support frame (4). The communication hole (18a) with the outside of the filter body +11 is connected to the spacer part (14) of the support frame (4).
It is designed to allow the permeate to drain away.

7 and 8 show a fourth embodiment of the present invention, in which a spacer (14) is provided in the center of the support frame (4), and outer recesses (24) and (25) are provided. A filter body [
1) and (2) are fitted from both sides of the support frame (4) to form a filtration unit (5). Therefore, the filter body fil
, (2) is formed by this spacer (14), and similarly to the first embodiment, this space (9) is used as a permeate discharge chamber. Further, the recesses (24) and (25) of the filter bodies (1) and (2) will be used as stock solution supply chambers.

In each of the above embodiments, the spacer and packing are used as the filter body (1).
, (2) are provided separately, but these are the filter body (1),
It may be glued to the surface of (2) or integrally formed with lining or coating. In addition to using, for example, a central layer made of a sintered body of ceramic fine particles with an average pore diameter of 0.2 to 20 μm and a thickness of 1 to 5 mm, and a
A multilayer ceramic porous body having a surface layer made of a sintered body of ceramic fine particles having a thickness of 1 μm to 1 μm may be used.

(Function) With this configuration, 1 to 10 kg of the stock solution to be filtered is supplied from the stock solution supply pipe (19) of one end plate (8).
If the undiluted solution is supplied at a pressure of about /-, the undiluted solution passes through the undiluted solution supply hole (15) and communication holes (17), (17a) of the support frame (4) of each filtration unit (5) in which a large number of stacked units are stacked, and then passes through the support frame. It flows into the space (9) between the filter bodies il+ and (2) fitted inside the filter bodies (4) or into the space outside the filter bodies (1) and (2), and flows into the ceramic filter bodies (1) and (2). 2), and only the passing liquid is taken out from the space on the opposite side to the outside through the communicating holes (18) and (18a).

In addition, the remainder of the stock solution flows out to the stock solution outflow hole (16) of the support frame (4) via the communication holes (17) and (17a), and flows out to the stock solution outflow hole (16) of the support frame (4).
The filter body of the present invention, which is supplied to another filtration unit (5) separated by 120 Since steam sterilization at ~130°C can be performed, it can also be used in the food industry and pharmaceutical industry. Furthermore, a ceramic filter body (No. 11 has the advantages of excellent chemical resistance to organic solvents, acid and alkali resistance, and microbial resistance, and can easily recover from clogging by cleaning and can exhibit stable function for a long period of time. In addition, in the present invention, the stock solution is supplied to the entire surface of the filter body through the stock solution supply space formed on one side of the filter body and filtered, and the permeate is formed on the opposite side surface. Since the permeate flows into the permeate discharge space, it does not cause uneven flow unlike external pressure type/tubular modules, and a wide effective filtration area can always be maintained.Therefore, there is no stagnation of the liquid, and the concentration of the raw liquid relative to the permeate flow rate does not occur. Since the flow rate can be reduced, the power cost is significantly lower than that of an internal pressure type tubular module.However, since the ceramic filter body is a fired product, there will inevitably be some errors in wall thickness. There is a risk of cracking due to uneven pressure when a large number of filters are stacked and tightly tightened with the tightening cylinder (7), but in the present invention, the filter is fitted inside the support frame (4), so the filtration is easy. There is no risk of the body cracking due to uneven pressure, and the holes such as the stock solution supply hole (15) and stock solution outflow hole (16) in the filter body do not require machining, so it has the advantage of reducing manufacturing costs. It is something.

(Effects of the Invention) As is clear from the above description, the present invention has excellent heat resistance, chemical resistance, acid resistance, alkali resistance, etc. compared to those using polymer membrane modules, and also has an external pressure type tubular shape. Compared to those using modules, there is no reduction in the effective filtration area and no growth of microorganisms due to liquid stagnation, and the ratio of the flow rate used for filtration to the flow rate of the raw solution is lower than that using internal pressure type tubular modules. Since this is high, the flow rate of the stock solution can be reduced and the power cost can be reduced. Furthermore, the present invention has the advantage that the filter body is easy to manufacture and the structure is simple, since it is only necessary to stack a large number of filtration units.

Therefore, the present invention eliminates the problems of conventional liquid separators and greatly contributes to the development of industry.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the first embodiment of the present invention, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a sectional view showing the second embodiment of the invention, and Fig. 4 is an exploded perspective view thereof. The perspective view of FIG. 5 is the third embodiment of the present invention.
FIG. 6 is an exploded perspective view of the embodiment, FIG.
The figure 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) varnish spacer, (4):
Support frame, (5): Filtration unit, (9): Space, (14
): Spacer part, (17), (17a), (18)
, (18a): communication hole, (24), (25): recess.

Claims (1)

[Claims] 1. Two filter bodies (1
), (2) to form a space (9) between them for supplying the stock solution or discharging the permeated liquid, and connecting the space (9) with the communication hole (17).
a), (18) and the communication hole (1) with the outside of the filter body (2)
7) and (18a) to form a filtration unit (5).
5) A liquid separation device characterized by laminating and integrating many of the above. 2. The liquid separation device according to claim 1, wherein the filter bodies (1) and (2) are sintered bodies of fine particles of alumina or zirconia. 3. The liquid separation device according to claim 1 or 2, 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. 4. The support frame (4) is equipped with a spacer part (14) on one side, and the space (9) between the filter bodies (1) and (2) is
4. A liquid separation device according to claim 1, wherein said spacer is formed by a spacer (3). 5. The space (9) between the filter bodies (1) and (2) is the filter body (1).
), recesses (24), (25) formed on the side surfaces of (2)
A liquid separation device according to claim 1, 2, or 3, which is formed by.