JPS60114312A - Filter apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] FIELD OF THE INVENTION The present invention relates to a filtration device.

Technical background Through a filter medium, a pressure difference is maintained on both sides, and by passing the suspension of solids and liquid to be filtered through said filter medium, the filtrate is It passes, but
Filtration methods are known in which the solids are discharged from the filtration device and collected together with the unfiltered liquid.

Such filtration methods are used to separate liquid from suspension, or vice versa, to concentrate solid-liquid suspensions. The solid particles herein may be of any size, and may be so small that they cannot be observed with the naked eye.

That is, the terms "solid" or "solid particles" as used herein refer to any substance, regardless of its size, that can be separated from a liquid.

For example, the filtration method is used to collect filtrate containing antibiotics, enzymes, etc., or to concentrate cell suspensions, or to wash and resuspend cells.

An example of such a filtration method is a cross-flow filtration method, also called a tangential flow filtration method.

Cross flow filtration devices are well known in that the filter media is a porous cylinder with an annular cross section. The solid-liquid suspension is
The interior of a cylindrical filter medium is injected from one end, the filtrate is collected from the outer surface of the filter medium, and the concentrated suspension is discharged from the other end of the filter medium. In a modification of this, the suspension can flow over the outer surface of the filter medium from one end to the other, and the filtrate can be collected from the inside of the filter medium. In either case, a pressure difference is maintained across the filter medium between its two sides to aid the filtration action, and the conditions under which the suspension flows are such that the solid particles are on the surface of the filter medium. It is configured to limit fouling and build-up.

Although the filtration device described above performs an effective filtration action, it has the disadvantage that it is difficult to disassemble the filter medium when removing it for cleaning or replacement.

This becomes even more difficult in the case of a multi-neck cross-flow filtration device that has two end plates and a plurality of elongated cylindrical filter media installed between the two end plates.

In the case of a filtration device having a multi-mouth cylindrical structure as described above, it is difficult to remove even a single cylindrical filter medium. This is because this requires the removal of at least one of the end plates and possibly one or more of the other filter media. Furthermore, in the case of such a long cylindrical filter device, the holes provided in each end plate are
Accurate mutual adjustment is necessary. Otherwise, each filter medium will be placed in the wrong position.

OBJECTS OF THE INVENTION It is an object of the invention to provide a filtration device in which the above-mentioned disadvantages are eliminated or alleviated.

Contents of the Invention According to the present invention, there is provided a housing formed by combining a removable lid member, and a filter medium that can be removed when the lid member is removed, and a filter mounted in the housing can be removed. a device for removably fixing the filter medium at a predetermined position within the housing; and a first liquid reservoir provided near one end of the filter medium for discharging liquid from the housing. a discharge port, which is inserted into the housing and extends from the end of the filter medium to a position near an end of the external force, and the end thereof is arranged so that the first liquid a liquid intake pipe disposed on the same side as the discharge port; and a first liquid intake pipe disposed on the opposite side of the filter medium from the first liquid discharge port for discharging liquid from the housing. It is an object of the present invention to provide a filtration device having two liquid discharge ports.

In the case of the filtration device according to the present invention, it is easy to remove the lid member, access the filter medium, and remove the filter medium from the housing. A plurality of filter media may be arranged and fixed in place within a single common housing, and any of the filter media may be accessible when the lid member is removed.

Preferably, the filter medium has a cylindrical shape, and the liquid inlet and the first liquid outlet communicate with the interior of the filter medium. The seal may be removed by any suitable means.
Of course.

Advantageously, said housing comprises a manifold in which a filter medium is installed and a first liquid outlet is formed, and said liquid intake tube is attached via said manifold.

A device for fixing the filter medium is connected to the manifold 5, and the liquid intake pipe passes through the first liquid outlet and reaches the inside of the filter medium, and the liquid intake pipe and the first liquid discharge port are connected to the manifold. It is particularly advantageous if the outlet and the filter medium are coaxial.

When using the filtration device according to the present invention, the central axis of the filter medium is
Preferably, it is oriented vertically or approximately vertically.

However, it is also possible to face in other directions.

The figure shows a cross-flow filtration device consisting of a housing with an annular wall (1), a cover (2) and a manifold (3).

The annular wall (1) and the cover (2) form, as a whole, an independent and removable lid member as main components and can be secured by suitable means, such as for example by fasteners (not shown). , can be removably fastened to the manifold (3). In this case, the wall (1) is connected to the manifold (3) to prevent liquid from leaking during filtration.
A device is provided to ensure a secure seal against.

Alternatively, the wall (1) and the manifold (3) may be formed integrally, and the cover (2) may be attached to and removed from the wall (1) by appropriate means as a removable lid member. can be fastened and sealed. It is also possible for the removable lid to form part of the housing. In said housing there is provided a material suitable for filtering suspensions, such as a thick-walled porous plastic tube made of stainless steel, phosphor bronze, or polypropylene, or a tube made of sintered material. A manufactured, cylindrical filter medium (4) is arranged. A recess (3a) serving as a first liquid discharge port is provided in the center of the manifold (3), and the liquid is discharged from the recess (3a) through a pipe (5).

As can be seen from the figure, the filter medium (4) is attached via a gasket (6) provided at the upper peripheral edge of the recess (3a). The liquid intake pipe (7) passes through the recess (3a) and extends coaxially with the recess (3a), and constitutes a part of the manifold (3). Liquid intake tube (
7) extends to a position immediately in front of the upper end of the filter medium (4) and is coaxial with the filter medium (4).

A plate (8) is attached to the upper end of the filter medium (4) as a sealing upper lid member via a gasket (9). Furthermore, the plate (8) is located directly above the liquid intake pipe (7), as shown in the figure, and is fastened to said intake pipe by bolts (9a).

As shown in the figure, upper filtrate outlet Ql) and/or
A lower filtrate outlet 00 is provided in the housing (2).

When using this device, the liquid to be filtered must be in the liquid intake tube (
7) is injected at high velocity into the upper part of the filter medium (4), forming an annular shape between the liquid intake tube (7) and the filter medium (4), as shown by the arrow (8) in the figure. Flows along the space.

Although not shown, the filter medium (4) is
(which can be any method commonly used in cross-flow filtration methods), so that part of the liquid passes through the filter medium (4) and becomes the filtrate. . (Arrow (B) in the figure) While flowing down the annular space between the intake pipe (7) and the filter medium (4), the liquid is concentrated to a high density into a solid state and divided into four parts (3a). It flows in and is discharged via the outlet (5).

As can be seen from the figure, the liquid moves inside the filter medium (4) downward in the figure to the recess (3a) (filter medium (4)
) with the same inner diameter as ), then set the direction to 9.
It turns 0° and is discharged through the discharge port (5).

By providing the recess (3a) having the same radius as the filter medium (4), it is ensured that the effect of inhibiting the liquid from flowing out to the outside of the filter medium (4) is reduced.

The filtrate is collected by the outlet α0) or α1), but when the upper outlet 01) is used, the housing (2) is always filled with the filtrate, which prevents the filter medium (4) from drying out. In that sense, it is advantageous.

Depending on the desired product, either the filtrate or the concentrated batter liquid exiting the outlet (5) is collected. In the case of collecting concentrated liquid, it is of course possible to recirculate the concentrated liquid using the device to obtain a further concentrated liquid.

The device according to the invention as shown in the figure can be used to collect liquids containing, for example, solid particles, precipitates or crystals in a leaching process, inert particles, catalyst particles in a reaction process or cells of plants, animals or microorganisms. Can be used for filtration. Said device can be used, for example, inside a particular device (eg, a chemical reactor) to remove a liquid part and obtain a solid phase. In this case, a suspension containing a solid phase (e.g. catalyst) is flowed from a particular device and passed through said filtration device, the filtrate is collected and the concentrated solid phase is recycled back to the device. Ru. Alternatively, the filtration device according to the invention can be used to collect filtrate containing antibiotics, enzymes, etc., as conventionally utilized.

The filtration device according to the invention has a number of advantages.

In particular, the filter medium (4) can be easily accessed and replaced simply by removing the lid member of the housing (2). Furthermore, since both ends of the filter medium (4) are not fixed in the filter device, steam sterilization can be performed. In the case of a filtration device in which the filter medium is fixedly attached to a fixed plate at both ends, damage may occur due to expansion during heating, but in the case of the filtration device according to the present invention, Such damage can only occur. The above two features are significant advantages compared to prior art cross-flow filtration devices.

It will be readily appreciated that various modifications can be made to the filter device shown in the figures. For example, filter media (4
) can be installed in the recess of the manifold (3) with a necessary seal, and an O-ring can be provided around the outer periphery of the lower part of the seal. Alternatively, a thread may be formed at one end of the filter medium (4), and a thread groove may be formed on the inner wall surface of a portion of the recess in the hold (3) so as to be threaded therewith. .

The manifold (3) can be of different shapes and the filter media (4) can be attached to it in different ways. It may be preferred for the manifold (3) to form the uppermost end of said housing.

In this case, the manifold is provided with the first discharge port, and the liquid intake port is installed by extending downward through the inside of the filter medium which is also installed in the manifold. It will be.

In a filtration device having the above-described structure, a plurality of filter media (4) can be installed in a single housing. In this case, each filter medium (4) is provided with a liquid intake pipe (7) and a first outlet (3), each separately and correspondingly cooperating with each other.
a) is provided. A common header tube is provided for supplying liquid to each liquid intake tube (7) via a communicating tube in the manifold.

Similarly, a common header tube is provided to accommodate the highly concentrated suspension discharged from the interior of each filter medium and passes through each filter medium (4) into the housing. A common outlet is provided for receiving the incoming filtrate.

If you still need to replace any filter media,
It is clear that the desired filter media can be replaced without other filter media being obstructed.

In all embodiments of the invention, the inflow rate of the suspension is
Sufficient speed and the conditions under which the suspension flows inside the filter medium are preferred so that solids are inhibited from adhering and accumulating on the inner surface of the filter medium. Such a solid is
Accumulation on the inner surface of the filter media has been shown to reduce filtration efficiency.

Therefore, in order to maintain the filtration efficiency at a constant and acceptable level, it is necessary that the filtration device be backflowed from time to time. Since this technique is well known in the relevant technical field, further explanation will be omitted.

[Brief explanation of drawings]

The accompanying drawings are cross-sectional views of embodiments of filtration devices according to the invention. (1) Annular wall (2) Cover (3) Manifold (3a) Recess, first liquid outlet (
4) Filter material (5) Pipe (6) Gasket (7) Liquid intake pipe (8) Plate (9) Gasket (9a) Bolt θ0) Lower filtrate outlet 01) Upper filtrate outlet F' in the drawing: "lt (No change in content) Procedural amendment form) % expression % 1. Indication of the case Patent Application No. 215140 of 1982 2. Name of the invention Filtering device 3. Person making the amendment Relationship with the case Patent applicant name Title Tomnick Hunter Filters Limited 1, Agent 5, Date of amendment order September 5, 1980 (3) Engraving of the specification (no change in content) (4) Engraving of drawings (no change in content)

Claims (8)

[Claims] (1) a housing formed by combining a removable lid member; a filter medium that can be installed in or removed from the housing when the lid member is removed; a device for removably fixing the filter medium at a predetermined position within the housing; a first liquid outlet provided near one end of the filter medium for discharging liquid from the housing; is inserted into the filter medium and extends from the end of the filter medium to a position near the other end thereof, and the end thereof is disposed on the same side of the filter medium as the first liquid outlet. a liquid intake tube located on the opposite side of the filter medium from the first liquid outlet for discharging liquid from the housing; and a second liquid outlet for discharging liquid from the housing. A filtration device featuring: (2) The filtration device according to claim O), wherein the filter medium is cylindrical. (3) Claim (1) characterized in that the first liquid outlet and the liquid intake pipe communicate with the inside of the filter medium.
The filtration device according to item or item (2). (4) The housing is provided with a manifold in which a filter medium is installed and a first liquid outlet is formed, and the liquid intake pipe is not attached through the manifold. The filtration device according to any one of ranges (1) to (3). (5) The filtration device according to claim (4), wherein the device for fixing the filter medium is connected to the manifold. (6) The device for fixing the filter medium is connected to the liquid intake tube at an end remote from the manifold of the liquid intake tube. Filtration device. (7) Claim No. 5, characterized in that it includes a device for sealing between the filter medium and the manifold.
) or (6). (8) The liquid intake pipe passes through the first liquid outlet and reaches the inside of the filter medium, and the liquid intake pipe, the first liquid outlet, and the filter medium are coaxial. A filtration device according to claim (4).