JPH0429856Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a filtration device that performs precision filtration or ultrafiltration. Especially for drugs in the pharmaceutical industry, purified water,
The present invention relates to a membrane filtration device incorporating a hollow fiber membrane for precision filtration or ultrafiltration used to filter alcoholic beverages in the fermentation industry, ultrapure water used in the semiconductor manufacturing industry, cooling water in the nuclear industry, etc.

[Conventional technology]

Traditionally, pharmaceutical industry, fermentation industry, semiconductor manufacturing industry,
As a membrane filtration device used for precision filtration or ultrafiltration in the nuclear power industry, an external pressure total filtration type membrane filtration device is used.

For example, as shown in FIG. 3, a membrane filtration device of an external pressure total filtration type incorporating a hollow fiber membrane is constructed such that a stock solution supply port 5 is arranged on the peripheral wall surface of both ends of a large number of hollow fiber bundles 1 serving as filter media. A structure is known in which a cap 9 is bonded to a filter outer cylinder 6 with an adhesive, one end is open, the other end is sealed, and the cap 9 has a filtrate discharge port 8 at the opening.

Then, when starting to use the membrane filtration device, the air in the stock solution filling chamber 4 was vented from the air vent plug 10.

[The problem that the idea aims to solve]

However, conventionally, the air bleed plug 10 is attached to only one location, so for example, in the membrane filtration device shown in FIG. , the installation posture was limited. This required modification of the installed piping to match the membrane filtration device, which was a big problem in the pharmaceutical industry and semiconductor manufacturing industry, which are extremely sensitive to contamination.

The purpose of the present invention is to solve the conventional problems and provide a membrane filtration device that can be installed in any position.

[Means and actions to solve the problem]

The above-mentioned object of the present invention is to arrange a filtration membrane at a position forming a core along the central axis of a filter outer cylinder having a raw water inlet formed on the peripheral wall surface, and to dispose a filtration membrane at a position forming a core part, and to form an opening end between the filter outer cylinder and the filtration membrane. In an external pressure total filtration type membrane filtration device equipped with a cap having a permeated water outlet in a part thereof, an air bleed plug for removing air from a stock solution filling chamber between the filter outer cylinder and the filtration membrane is provided in the filter part. A filtration device, characterized in that the air bleed plugs are provided at both ends of the outer cylinder and are configured such that the positions of the air bleed plugs between the two end portions are in opposite directions on substantially the same longitudinal section of the filter outer cylinder. This is achieved by

Regarding the embodiment of the membrane filtration device of the present invention, the first
This will be explained using figures. However, the present invention is not limited only to the examples.

The membrane filtration device of the present invention has a structure in which a hollow fiber bundle 1 is bonded with an adhesive to a filter outer cylinder having a liquid solution supply port 5 on the peripheral wall, and a cap having a filtrate discharge port 8 is attached to the open end of the hollow fiber bundle 1. to do. More specifically, it has an open end 2 where the hollow fiber ends are open, a closed end 3 where the ends are sealed, and a stock solution filling chamber 4 surrounded by the hollow fiber bundle 1 and the filter outer cylinder 6. As an air bleed plug for extracting air from the stock solution filling chamber 4, an air bleed plug 11 is installed at an arbitrary location on the peripheral wall surface of the filter outer cylinder 6 close to the open end 2, and a closed end opposite to the open end is installed. Plug 11 on the peripheral wall surface of filter outer cylinder 6 adjacent to 3
An air bleed plug 12 is provided at a location opposite to the one shown in FIG. The present invention is not limited to a filter device having a tapered filter outer cylinder 6 like the filter device shown in FIG. 1, but is also effective in a conventional filter device having a parallel outer cylinder.

In this aspect, an air bleed plug for extracting air from the stock solution filling chamber 4 is attached to the open end 2.
When the hollow fiber bundle 1 of the filtration device is used in the upper and lower, right and left positions, it is possible to provide the hollow fiber bundle 1 in the opposite direction at any location of the filter outer cylinder 6 close to the opening end 2 and at the location opposite to the opening end 2. This is to make it easier to remove the air from the stock solution filling chamber 4, and to position one of the air bleed plugs at the top of the stock solution filling chamber 4. In other words, in the membrane filtration device of the present invention, the two air bleed plugs installed near the open end 2 and the closed end 3 are located on the peripheral wall surface of the filter outer cylinder 6, for example. They are located substantially on a plane (cross section) that vertically traverses the central axis of the outer cylinder 6, and are configured to face oppositely to each other.

In addition, when the filter outer cylinder 6 has a slope (taper) as in this embodiment, a holding protrusion 15 is formed on the filter outer cylinder 6 to prevent the clamp from slipping when it is attached. It is advantageous to keep it.
Note that the protrusion 15 may be an annular one extending around the entire circumference of the filter outer cylinder 6, or may be composed of a plurality of protrusions spaced apart at regular intervals, and is not particularly limited.

The hollow fiber membrane used in the present invention is composed of a microporous membrane and is capable of separating fine particles of 10 μm to 0.005 μm. The forming polymer material is not limited, and examples thereof include cellulose ester, polyamide, polyfluorocarbon, polysulfone, polypropylene, polyethersulfone, and the like.

When raw water is filtered using the membrane filtration device shown in FIG. Filtered through a microporous membrane. The filtrate passes through the hollow tube, collects at the open end 2, passes through the liquid collection chamber 7, and flows out of the filter from the filtrate outlet 8. When the filtration device is placed horizontally as shown in Fig. 1, the air accumulated in the stock solution filling chamber 4 at the beginning of filtration and during operation is discharged from the air release valve 11 located at the top of the stock solution filling chamber 4. This allows the membrane filtration device to fully utilize its filtration ability.

The air bleed plug of the present invention can ensure that either the air bleed plug 11 or 12 is located at the highest position of the stock solution filling chamber 4, no matter what position the membrane filtration device is installed in.

The case where the membrane filtration device of the present invention is installed in various postures will be explained using FIG. 2.

Figure 2a shows that when the filtrate discharge port 8 is placed at the top and the stock solution supply port 5 is placed at the side, the air in the stock solution filling chamber 4 can be released by using the air release plug 11 and opening the valve 13. I can do it. In this case, the valve 14 of the air bleed plug 12 is closed. At the end of filtration, the valve 14 of the air bleed plug 12 is opened and can be effectively used for draining liquid from the stock solution filling chamber 4.

Fig. 2b shows that when the filtrate discharge port 8 is placed at the bottom and the stock solution supply port 5 is placed at the side, the air in the stock solution filling chamber 4 can be released by using the air release plug 12 and opening the valve 14. I can do it. In this case, the valve 13 of the air bleed plug 11 is closed. At the end of filtration, the valve 13 of the air bleed plug 11 can be opened to effectively bleed liquid from the stock solution filling chamber 4.

Figure 2c shows that when the stock solution supply port 5 is placed at the top and the filtrate discharge port 8 is placed at the side, the air in the stock solution filling chamber 4 can be released by using the air release plug 11 and opening the valve 13. I can do it. In this case, the valve 14 of the air bleed plug 12 is closed. At the end of filtration, the valve 14 of the air bleed plug 12 is opened and can be effectively used for draining liquid from the stock solution filling chamber 4.

FIG. 2d shows that when the stock solution supply port 5 is located at the bottom and the filtrate discharge port 8 is located at the side, the air in the stock solution filling chamber 4 can be released by using the air release plug 12 and opening the valve 14. I can do it. In this case, the valve 13 of the air bleed plug 11 is closed. At the end of filtration, the valve 13 of the air bleed plug 11 can be opened to effectively bleed liquid from the stock solution filling chamber 4.

In the above embodiment, the air bleed plug is
Although these are provided in two locations, a configuration in which more locations may be provided may also be used.
Furthermore, it goes without saying that the present invention is not limited to filtration devices using hollow fiber membranes as filter media.

[Effect of idea]

With the membrane filtration device of the present invention, air can be sufficiently vented even in any mounting position of the membrane filtration device.
Furthermore, it has become possible to efficiently extract the stock solution from the stock solution filling chamber after the filtration operation is completed.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of an embodiment of the membrane filtration device of the present invention, Fig. 2 is an explanatory diagram of various installation situations of the membrane filtration device of the present invention, and Fig. 3 is a longitudinal cross-section of an example of a conventional filtration device. It is a front view. DESCRIPTION OF SYMBOLS 1... Hollow fiber bundle, 2... Open end, 3... Closed end, 4... Stock solution filling chamber, 5... Stock solution supply port, 6
... Filter outer cylinder, 7 ... Liquid collection chamber, 8 ... Filtrate outlet, 9 ... Cap, 10, 11, 12 ... Air bleed plug, 13, 14 ... Valve, 15 ...
protrusion.

Claims (1)

[Scope of utility model registration request] A filtration membrane is arranged at a position forming a core along the central axis of a filter outer cylinder with a raw water inlet formed on the peripheral wall surface,
In the external pressure total filtration type membrane filtration device equipped with a cap having a permeated water outlet at the open end of the filter outer cylinder and the filtration membrane, the air in the stock solution filling chamber between the filter outer cylinder and the filtration membrane Air bleed plugs for extracting air are provided at both ends of the filter outer cylinder, and the positions of the air bleed plugs between the two end portions are in opposite directions on substantially the same longitudinal section of the filter outer cylinder. A filtration device characterized by being configured as follows.