JPS601767Y2 - liquid separator - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a liquid separation device that bundles a large number of hollow fiber membranes formed using fibers, supplies a stock solution into the hollow fiber membranes, and extracts permeated water.

The liquid separation device is small and water-permeable, in which a large number of hollow fiber membranes are bundled and housed in a case, pressure raw water is supplied to the hollow fiber membranes, and permeated water that has passed through the hollow fiber membranes is taken out from the outlet of the case. Because of its excellent performance and high reliability of treated water quality, it is used in a wide range of applications, including for obtaining ultrapure water for hospitals, ultrapure water for electronic materials, and in hemodialysis equipment.

In the above-mentioned liquid separation device, if the hollow fiber membrane has bends or bends, this part creates flow path resistance for the fluid, creating a fluid trap part in the middle of the flow path, which adversely affects the amount of permeated water and prevents the fluid from flowing. Once trapped, the SS1 particles are temporarily trapped and flow out over time.

In addition, bacteria propagate from the trap portion, causing the problem that live bacteria can also be seen leaking out.

In addition, although both ends of the hollow fiber membrane group are sealed at the ends of the case, they are completely free from the case, so the flow of permeated water flowing out from the outlet of the case causes the hollow fiber membranes to The free portion of the fiber membrane group is constantly pulled toward the outlet, and as a result, the hollow fiber membrane comes into contact with the permeated water outlet portion of the case, causing damage.

Damage to the hollow fiber membranes will cause the raw solution to flow directly to the permeate outlet, reducing the quality of the treated water, so damage must be reliably prevented from occurring.

Furthermore, if the hollow fiber membrane deforms and closes the permeated water outlet, this will create flow path resistance and cause the above-mentioned problems.

Conventional liquid separation devices include those that have an annular rib on the inner periphery of the case that receives the hollow fiber membranes, and those that have a group of hollow fiber membranes bent into an arch shape inside the case and fixed at both ends to the case. Proposed.

However, in the former separation device, the hollow fiber membrane is bent by the ribs, creating a trap in the flow path, and in the latter separation device, the flow path resistance is large and the process cannot be processed in the same way. This causes a decline in water quality.

Furthermore, in both separation devices, the permeated water outlet of the case is provided in the freely moving part of the hollow fiber membrane group, so the flow of outflowing permeated water may cause the hollow fiber membrane to come into contact with the outlet or close the outlet. Therefore, it can be said that it has the same problems as mentioned above.

This idea was made in order to solve the above-mentioned problems, and a fixing part between the hollow fiber membranes is provided inside the end seal part of the hollow fiber membrane group, and a fixing part is provided at a position facing this fixing part. It is an object of the present invention to provide a fluid treatment device which has a permeated water outlet in a case, has no flow path resistance in a hollow fiber membrane, and has high treatment performance.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in the figure, the processing device consists of a cylindrical case 1, two groups of linear hollow fiber membranes in which several hundred fibers are bundled and inserted into the case 1, and headers 3, 3 attached to both ends of the case 1. has been done.

The hollow fiber membrane 2 is made of cellulose acetate, polyamide,
It is made of a non-cellulose polymeric material such as polysulfone, polyimide, polyolefin, polyethersulfone, etc., and is cut to the same length as case 1.

At both ends of the case 1, the space between the end of the case 1 and the inserted two groups of hollow fiber membranes is sealed with a sealing part 4 of an appropriate length from the end of the case 1 inward. is fixed to the case.

The seal portion 4 is formed by, for example, injecting an epoxy adhesive, and when the adhesive is injected to form the seal portion 4, the adhesive is spread inside the seal portion 4 of the two groups of hollow fiber membranes by capillary action. Penetrates into the sealing part 4 of the hollow fiber membrane 2 group.
A fixing portion 5 for adhesively fixing the thread membranes to each other is formed on the twisted side.

Therefore, both ends of the hollow fiber membrane group 2 are fixed in the case 1 by the seal parts 4, and the space with the case 1 is completely sealed. 5, they are mutually fixed and deformation of the hollow fiber membrane due to the flow of permeated water is prevented.

A permeated water outlet 6 is provided at the end of the case 1 at a position corresponding to the outer periphery of the fixing part 5.

Since the outlet 6 is located outside the fixing part 5, the flow of permeated water toward the outlet 6 does not cause the hollow fiber membrane 2 to come into contact with or close the outlet 6.

The liquid separation device of this invention has the above configuration,
To assemble, two groups of several hundred hollow fiber membranes are fixed with a polyethylene net and inserted into a cleaned case 1.

The ends of the 2 groups of hollow fiber membranes are made to protrude from both ends of the case 1 by about 3 or Ign, and the ends of the hollow fiber membranes 2 are plugged by means such as crimping.

Next, one end of the case 1 is set in a mold, and an epoxy adhesive is injected into the mold.

When the above-mentioned epoxy adhesive is injected into the mold, the adhesive infiltrates the space between the case 1 and the two groups of hollow fiber membranes.

A seal portion 4 is formed in the space between the case 1 and the hollow fiber membrane group 2 by injecting the adhesive.

For example, the permeated water outlet 6 in the case 1 is provided at a position approximately 25 cm from the end of the case, and the seal portion 4
The amount of adhesive to be injected is determined so that the adhesive does not cover the outlet 6.

When a predetermined amount of adhesive is injected into the mold, the adhesive that has entered between the case 1 and the two groups of hollow fiber membranes moves further inward than the sealing part 4 due to the capillary phenomenon that occurs at the contact area between the hollow fiber membranes 2. The fixing portion 5 that penetrates the hollow fiber membranes 2 and connects the hollow fiber membranes 2 to each other is formed in a portion inside the seal portion 4.

When the adhesive hardens, the case 1 is removed from the mold and the ends of the two groups of hollow fiber membranes are cut so as to be evenly aligned with the ends of the case 1 while heating the adhesive portion.

At the other end of the case 1, the steps from setting in the mold to cutting the ends of the two groups of hollow fiber membranes are performed in the same manner as described above.

After this, the header 3 is adhesively fixed to both ends of the case 1 to complete the assembly.The header 3 has a shape that allows the flow path of the header 3 to flow uniformly and not create flow path resistance to the fluid, as shown in the figure. It is processed into.

In the separator assembled in this way, both ends of the two groups of hollow fiber membranes are fixed to the ends of the case 1 with the seal parts 4, and the permeable wood outlet 6 of the case 1 is located in the two groups of hollow fiber membranes. Since the fixed part 5 is formed in the part, even if the fluid permeation treatment is performed, the part of the hollow fiber membrane 2 facing the permeation wood outlet 6 will not move toward the outlet or deform. There is no trap portion or flow path resistance in the hollow fiber membrane 2.

As described above, according to this invention, a fixing part between the hollow fiber membranes is formed inside the end seal part of the hollow fiber membrane group inserted into the case, and the case has a permeable ice trap at a position facing this fixing part. Since the outlet is provided, the movement of the hollow fiber membrane with respect to the permeable wood outlet part is completely blocked by the fixing part, and the hollow fiber membrane may come into contact with the permeable wood outlet part and cause damage, or the hollow fiber membrane may not move towards the permeable wood outlet part. There is no sealing, and therefore no traps or flow path resistance occur in the flow path of the hollow fiber membrane, which greatly improves permeation treatment capacity, prevents bacterial growth within the module, and prevents electronic This has the effect of increasing the electrical resistance of ultrapure water for industrial use.

In addition to the epoxy adhesive, any adhesive that cures at room temperature can be used as the adhesive used in this invention.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a liquid separation device according to this invention, and FIG. 2 is a partially cutaway side view of the same. 1... Case, 2... Hollow fiber membrane, 3.
...Header 4...Seal part, 6...
... Permeated ice outlet.

Claims (1)

[Scope of utility model registration request] A large number of hollow fiber membranes are bundled and inserted into the case, and the ends of the hollow fiber membrane group and the end of the case are sealed with adhesive, and the seal is placed inside the sealed portion of the hollow fiber membrane group. A liquid separation device characterized in that a fixing part is formed by bonding only the hollow fiber membranes to each other using an adhesive, and a case is provided with a permeable wood outlet at a position facing the fixing part.