JPS59160511A - Filter device - Google Patents

Abstract

PURPOSE:To prevent leakage of a liquid to be treated to a treated liquid side by providing a through-hole under the pressure lower than the pressure in a chamber for the liquid to be treated between the chamber for the liquid to be treated and the chamber for the treated liquid. CONSTITUTION:A leading out port 13 for a treated liquid is provided at the center of a cover body 12 to be mounted in the opening part of a housing 1, and an introducing port 12 for a liquid to be treated is provided around the port 13 in such a way that the opening ends thereof open respectively into the housing 1. A projecting part 9 of a filter member 3 is inserted into the port 13 and is sealed by two O-rings 15. A hole 14 communicating with the two O-rings is further punched in the body 2. Therefore, even if the O-rings are damaged, the liquid to be treated on the pressurizing side flows through the hole 14 open to the atm. punched in the body 2 to the outside of the system, by which the leakage of the liquid to be treated to the treated liquid side is prevented and the easy discovery of the damaged O-rings is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved filtration device that prevents the liquid to be processed from leaking to the processing liquid side.

Recently, with rapid progress in membrane separation technology, separation methods such as reverse osmosis, ultrafiltration, and precision filtration that utilize the selective permselectivity of membranes have been used in medical fields such as blood and ascites treatment, treatment of various industrial waste liquids, and seawater treatment. It is becoming widely used for desalination, etc. Devices using these separation membranes, for example, - using a φ filtration element whose open end is sealed, and - which has only an open end, filter the processing liquid using only the pressure difference between the inside and outside of the filtration element as a driving force. When concentrating, it is absolutely necessary to prevent the liquid to be processed from leaking into the liquid at the separation membrane or other parts such as seals. In particular, in a filtration device for the purpose of sterilization, if even one bacteria leaks into the processing liquid, it will quickly grow and become completely incapable of achieving the purpose of sterilization. Must be strictly avoided. As research into separation membranes progresses, the completeness of the sterilization of the membrane itself is being achieved, but the problem of leakage in devices incorporating membranes, especially at seals, still remains. Especially for in-line applications where the inlet of the liquid to be treated and the outlet of the filtrate are in a straight line 4) fr
The 8J filtration device has excellent features such as being easy to install, taking up little space, being easy to use, and being easy to put on and take off.As a so-called cartridge type filtration device, it is used in many fields such as water filtration. However, cartridge-type filtration devices usually have a structure in which a single sealing member separates the processing liquid chamber from the processing liquid chamber. Even if there is a leak on the liquid side, the leak cannot be detected from the outside, and furthermore, even if a bacterial test of the liquid to be treated reveals that the liquid to be treated is leaking to the liquid side, the cause may be the sealing member or the filtration. At present, it was not known whether the device was a device or not.

The present inventors have arrived at the present invention as a result of intensive studies to provide a filtration device that can reliably prevent the processing liquid from leaking into the liquid to be processed and can also detect defects in the sealing member. . That is, the present invention inserts a filtration member in which a cap body having a cylindrical protrusion is adhesively fixed to an opening at the other end of a filtration element whose mouth end is sealed in a housing having an opening at one end and a protrusion on the inside. The filtration member is supported by the inner protrusion, and a lid body is attached to one open end of the housing, in which a processing liquid, an outlet, and an inlet for a liquid to be treated are opened in the housing. A protrusion of the cap body is liquid-tightly inserted into one opening of the lid body so as to be sealed with at least two sealing members to form a processing liquid chamber and a to-be-processed liquid chamber within the housing, and This filtration device is characterized in that the lid is provided with a hole that penetrates between at least two seal members attached to the opening of the lid into which the cap protrusion is inserted.

A feature of the present invention is that both the inlet for the liquid to be treated and the outlet for the treated liquid are provided in the lid. Due to these features, it is easy to install the filtration device on the actual line, and when replacing the filtration element, the housing and filtration element are attached and removed in the same direction, so only a small amount of space is required when attaching and detaching. It has the excellent effect that the liquid side is less likely to be contaminated. In particular, if the inlet of the liquid to be treated and the outlet of the treated liquid are arranged in a straight line, the above characteristics can be further utilized. Another feature of the present invention is that at least two sealing members are attached to the opening of the lid into which the cap protrusion is inserted, and a hole is formed in the lid that passes between the sealing members. . Due to this feature, even if the sealing member of the liquid chamber to be processed is defective, the liquid to be processed can leak into the through hole S, thereby preventing the liquid to be processed from leaking into the processing liquid chamber. If the outflow of the liquid is detected, it can be determined that the liquid to be treated is leaking due to a seal failure. Furthermore, by making the pressure in the through hole lower than the pressure in the processing liquid chamber, or at least keeping it equal to the pressure in the processing liquid chamber, it is possible to fundamentally prevent the processing liquid from leaking into the processing liquid chamber through the through hole. It is.

Next, one embodiment of the filtration device of the present invention will be described with reference to the drawings.

The device of the present invention has two types: an external pressure type and an internal pressure type.

Figure 1 shows an external pressure filtration type filtration device, which consists of a cylindrical casing 1 with an open top, a filtration member 3 housed inside the casing 1, and a sieve body attached through the top opening. It is composed of a lid body 2.

A cylindrical casing 1 having an open end at the top is provided with a protrusion 4 that supports the upper part of the filter member, and is configured to allow liquid to pass through the protrusion. In FIG. 1, a large number of openings 5 through which the liquid to be treated passes are bored in the protruding part. A drain port 6 is provided at the lower end,
The drain port is closed with a stopper 7. The filtration member 6 has a cylindrical shape, which is sealed at one end and has a so-called free end, in which a large number of hollow fibers having openings are adhesively fixed, and a filtration element 8 has a so-called free end, and is adhesively fixed to the upper adhesive end of the filtration element. It is formed of a conical shaft body 11 having a protrusion 9. Further, two seal members, for example, an O-ring 15, are attached to the outside of the protrusion 9 of the cap body 11.

The hollow fiber is not particularly limited as long as it can be used as a permselective membrane for dialysis, precision filtration, ultrafiltration, reverse osmosis, or the like.

Regenerated cellulose, cellulose derivatives, polyvinyl alcohol, polyolefin, polyacrylonitrile,
Various polymers such as polymethyl methacrylate, polyamide, polyester, and polysulfone can be used, and each hollow fiber preferably has an outer diameter of 10 to 5000 μm and a membrane thickness of about 5 to 500 μm. These hollow fibers are assembled into a bundle of hundreds to tens of thousands of fibers.

One end of the bundled hollow fibers is fixed with an adhesive in an open state, and is used as an end portion for attachment to the casing. At the other end of the hollow fiber, only the opening of the hollow fiber is sealed, and the hollow fibers are not bonded to each other, forming a free end.

The free end can be formed by heat-sealing the end, by penetrating the adhesive into a hollow space using capillary action, or by vacuum suction, or by applying centrifugal force to the adhesive and another second liquid. Method for invading and assimilating hollow parts (Special Publication No. 18925, 1983)
In particular, the last method yields high-quality free-end hollow fiber bundles that can be used industrially.

A processing liquid outlet 13 is provided at the center of the lid 2 attached to the opening of the casing 1, and around the outlet 13, the open ends of the liquid to be processed inlets 12 are arranged so as to open into the casing. It is provided. The processing liquid outlet and the other end opening of the processing liquid inlet are opened on the same straight line with the flow paths changed by 90 degrees inside the lid, and the processing liquid outlet pipe (not shown) and the processing liquid inlet are respectively opened. Connected to a tube (not shown). In addition, the processing liquid outlet 1
The protrusion 9 of the filter member 6 is inserted into the filter member 6 and sealed with two O-rings 15. The lid 2 is also provided with a hole 14 that passes through between two O-rings that seal the lid and the protruding body inserted into the lid. Reference numeral 16 denotes a band coupling that connects the sieve body 1 and the lid body 2 through a packing 17 in a liquid-tight manner.

These gaskets 17' and O-rings 14 provide a liquid-tight structure between the liquid chamber 20, the liquid chamber 21 and the hollow fiber wall membrane. That is, the liquid to be treated enters the liquid to be treated chamber 20 on the outside of the filter member 3 through the inlet 12 provided in the lid body 2 from the liquid to be treated inlet pipe, and some of the components that permeate through the hollow fiber membrane. The liquid passes through the hollow fiber membrane, passes through a passage inside the hollow fiber, is collected in the processing liquid chamber 21, passes through the cap body 11, and is taken out from the processing liquid outlet pipe through the processing liquid outlet 13 of the lid body. On the other hand, the concentrated liquid of components that do not pass through the hollow fiber is stored in the housing 1.
is taken out from the outlet 6 at the bottom of the .

In the above filtration device, the part where the liquid to be treated leaks to the treated liquid side is from the gap between the opening 13 for leading out the treated liquid of the lid 2 and the protrusion 9 of the filter member 3 inserted into the opening. The gap is completely sealed with two O-rings. However, if the O-ring is damaged, the liquid to be treated on the pressurized side will flow out of the apparatus through the through hole 14 that is open to the atmosphere, which is made in the lid, so it is possible to prevent the liquid to be treated from leaking to the treated liquid side, and the O-ring damage can be easily detected. FIG. It is sealed with a gasket 61 attached to.

In addition to the above-mentioned method using a seal, sealing may be performed using both a seal and an O-ring.

In the case of the external pressure circulation system, the discharge port provided at the lower end of the housing can be used as the circulating fluid outlet from the filtration device. Furthermore, an internal pressure filtration type device has a structure in which the liquid to be treated is pressurized inside the hollow fiber, and the treated liquid that has passed through the membrane is taken out to the outside of the hollow fiber.

As described above, the filtration device of the present invention is designed to ensure that the liquid to be treated never leaks into the processing liquid side by providing a through hole with a lower pressure than the liquid chamber to be treated between the liquid chamber to be treated and the liquid chamber to be treated. It is a device that is especially useful as a filter for removing viruses and bacteria that require strict filtration accuracy.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the device of the present invention, and FIG. 2 is an enlarged sectional view of the sealing portion between the lid and the filter member. 1........ Housing 2........
・Lid body 3... Filtration member patent applicant RiRa Shi Co., Ltd. Agent Ken Honda, patent attorney Figure 1 Figure 2 Procedural amendment (voluntary) June 1, 1980 Wakasugi, Commissioner of the Japan Patent Office Kazuo-dono 1, Indication of the incident, Patent Application No. 58-55502, 2, Name of the invention, Filtration device, 1621-108, Sakuzu, Kurashiki-shi, Rira Co., Ltd. Representative, Cotton Manager Ueno et al. - 4, Agent, Sakazu, Kurashiki-shi Aoeyama 2045-1 Telephone Tokyo 03. (277) 3182 5. "Claims" column and "Detailed Description of the Invention" column 6 of the specification to be amended. Contents of the amendment 1. Attachment 2 to the claims column of the description. , in the Detailed Description of the Invention column (1) of the specification, page 6, line 17, ``-The mouth end is sealed and the hole is closed'' is corrected to ``One end is sealed or a loop is formed.'' (2) On page 6, line 5, ``sealed J'' is corrected to ``sealed or a loop is formed.'' (3) In the 4th line of page 7, after ``The other end of the thread forms one loop, or'' is inserted. A cap having a cylindrical protrusion Y at the other end of the cap having one end sealed or forming a loop in a housing 1 having an opening at one end and having a protruding portion 4 inside the claims. Insert the filtration member to which the body has been adhesively fixed, and support the filtration member with the inner protrusion, and attach the opening end of the casing to the opening end of the casing for the treatment liquid outlet and for the liquid to be treated inlet. The cap body is equipped with a lid body with an opening, and a protruding through hole 14 is bored in the cap body so that one opening of the lid body is sealed with at least two sealing members. Filtration device. Procedural amendment (voluntary) January 20, 1980 Kazuo Wakasugi, Commissioner of the Japan Patent Office 1, Indication of the case Patent Application No. 1983-33302 2, Title of the invention Filtering device 3, Person making the amendment Relationship with the case Patent application 1621 Sakazu, Kurashiki City (108) RiRa Co., Ltd. Representative Director Ueno et al. - 4, Agent 5, Subject of amendment 6, Contents of amendment (1) "Proliferation Planting" on page 2, line 13 of the specification ” should be corrected to “breeding.” (2) Page 2, line 14 of the specification, page 3, line 7, page 3, line 9, page 3, line 12, page 5, line 6, “Processing liquid” on page 5, line 8 is “processed liquid”
Correct. (Subspecification page 2, line 14, page 3, line 7, page 3, line 9', page 3, line 12, page 5, line 9)
Correct the "liquid to be processed" in line 1 to "processing liquid". (4) “Filtrate outlet” on page 2, line 19 of the specification is corrected to “processing liquid outlet.” (5) “Processed liquid passes” on page 5, line 20 of the specification.
is corrected to "the liquid to be treated passes through". (6) Delete "From the processing liquid outlet pipe" on page 8, line 15 of the specification. that's all

Claims (1)

[Claims] A filtration member, in which a cap body having a cylindrical protrusion is adhesively fixed, is inserted into the opening at the other end of a filtration element whose one end is sealed in a casing with an opening at one end and a protrusion on the inside. 1. At the same time, a lid body is attached to the open end of the housing in which a processing liquid outlet and a liquid inlet to be treated are opened in the housing, and one side of the lid body is attached to the opening end of the housing. A protrusion of the cap body is liquid-tightly inserted into the opening so as to be sealed with at least two sealing members to form a processing liquid chamber and a liquid chamber to be processed in the housing, and the protrusion of the cap body A filtration device characterized in that the lid is provided with a hole that penetrates between at least two sealing members attached to the opening of the lid into which the filtration device is inserted.