JPS61107911A - Molded filter member - Google Patents

Abstract

PURPOSE:To increase filtering area and enhance filtering capacity by piling up plural moldings shaped abacus-counter and inserting a high-strength cylinder having many holes into the piled moldings to form a filter member. CONSTITUTION:First, diatomaceous or pearlite powder is filled into a mold by means such as heating or binder addition, so that the former is made into a disc shape or an abacus-counter shape with a hole in the center. Thus a molding having high liquid permeability is formed. In case of a disc-shape molding, both upper and lower angles of the surrounding of a disc are scraped off to obtain an abacus-counter shaped molding 1. A plural number of these moldings, normally 3-10 pieces, are piled up with a cylinder 2 having the same diameter as the center hole of the molding 1 as a support. A molded filter member consisting of poled moldings 1 can have a long life by straining impurities not only on the surface but also inside. In addition, the member allows an accelerated filtration speed even under the same pressure because of low surfacial clogging ratio by impurities.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a molded P material which has an increased overarea and a dramatically improved p over capacity.

(Prior art) Conventional molded p-materials include a simple cylindrical material made of a mixture of valve wood, wood flour, cotton linter fibers, or a mixture of diatomaceous earth, or a material with vertical grooves on the outer periphery of the cylinder. There are those that are attached shallowly or those that have stacked disks.

(Problems to be Solved by the Invention) Such conventional molded p-materials are: - have a small overarea, are gaseous bodies that entrain moisture or oil, are water mixed in oil, or are oil mixed in water; P when filtering things etc.
There was a problem in that the material could become clogged, making it impossible to pass through.

(Means for Solving the Problems) The present invention was made to solve the above-mentioned problems of conventional molded door materials, - to increase the excess area, and - to dramatically improve the excess capacity. A liquid-permeable disc-shaped molded body with holes cut in the upper and lower corners of the circumference is cut diagonally, and multiple molded bodies are stacked together to form a disc-like shape, with a large number of holes in the center as a support. This invention relates to a molded p-material characterized in that it is constructed by inserting a strong cylinder with an open space.

Next, a method for manufacturing the molded p-material of the present invention will be explained.

First, powder of Nainu earth or pearlite or o, i
- A granular product, or a single item or a mixture of cellulose fibers or wood flour, etc., is placed in a mold and formed into a disk shape or abacus shape with a hole in the center by heating, adding a binder, etc. Then, a liquid-permeable molded body is made. In the case of a disc-shaped molded product, the upper and lower corners of the periphery of the disc are cut off to obtain a disc-shaped molded product. However, the abacus-like shape refers to a abacus-like shape or a shape similar to this, and does not need to be a completely similar shape, for example, the left and right ends of the longitudinal section do not need to be sharp. Generally, if the thickness of the molded object is thick, one thick angle,
If it is thin, shape it to a small angle.

In the present invention, as shown in FIG. 1, it is preferable that the angle α (same as the angle of the longitudinal section) of both ends of each molded body is in the range of 10 to 90. A plurality of molded bodies 1, usually 8
~10 pieces are stacked as shown in FIG. 1 using a cylinder 2 having the same diameter as the center hole of the molded body 1 as a support. This support cylinder 2 serves as an outlet for liquid or ventilation after impurities in the raw solution or gas before passing through the surface or inside of the molded body, so it is designed like a punch hole. It must have a perforated tube structure with many holes, and at the same time, it must have the strength to withstand the pressure during filtration. Also, as shown in Fig. 1, a stack of molded bodies 1 is called a molded p-material, and this molded p-material can be used as a so-called cartridge filter.
Mainly used as a variable exchange type. Therefore, the support cylinder 2 is made strong enough to withstand tightening during transportation and replacement.

One molded body of molded P material, whether it is too thin or too thick, approaches the surface area of a conventional cylinder, so the maximum thickness of the molded body is T,
When the diameter is D, a normality of -3 to 10 is suitable. Also, when the diameter of the center hole is d, D/d −s ~ 10
A range of is appropriate.

If d is too small compared to D, the strength etc. will be unreasonable, and if it is too large, it will not be possible to make a large cut 8 shown in FIG. 1, and the surface area will not be large. Further, the vertical grooves 4 in Fig. 2 are provided to further increase the surface area, and there are usually 8 or more, preferably 8 to 20, on the outer periphery of the molded body, and the maximum I
It is more effective to provide a wedge-shaped or rectangular vertical groove 4 with IIIt in the range of 0.5 to 10% of the circumference. However, if molding is difficult, it may be omitted.

(Example) Next, the present invention will be further explained by examples.

Example 1 Cotton ti, 1 part by weight of IfM, and 1 part by weight of pulp fiber were added to water to which a small amount of polyester resin was added as a binder, and the mixture was thoroughly stirred to disperse. Put this suspension into a mold 2
Compressed and dehydrated with a load of 019, 2° thick, diameter IJI
A disk molded body with a center hole diameter of 25 m was prepared and dried. The upper and lower angles of the circumference of this molded body are as shown in 1st Fm! Shape it with a grinder to a width of □-8cIII, then use a trout to make the maximum width like the wedge-shaped vertical groove 4 in Figure 2! ,
1 seagull, long! , was cut into the size of 20 parrots using a grinder. This molded body was made with 180 punch holes of 4 diameters, 25 mm in diameter x 100 mm in length x 0.5 mm in thickness.
A molded door material of the present invention was made by inserting the stainless steel cylinder 2 of fil and stacking 5 sheets.

On the other hand, a conventional molded P material B was made by stacking six sheets of the dried disc molded bodies produced in the same manner, and it was installed in the edible oil filtering machine 5 shown in FIG. After the relatively dirty oil was removed, a comparative test was conducted on the molded P material B.

Molded P material 11 in the oil lifting machine 6 after use in 187
After the oil was circulated for 10 minutes with a σ1 vortex, the circulating oil was sampled from the oil tank 9 and a comparative test of clarity was conducted. In addition, the pressure and Pa rate over 10 minutes were measured. The results are shown in Table 1.

Note) Clarity is the light transmittance at a wavelength of 6801 m using a spectrophotometer.
The light transmittance of the sampled oil was measured using a spectrophotometer set to 100% light transmittance.

Example 2 The same molded p-materials A and B as in Example 1 were produced using the same passing machine as in Example 1, using waste oil after being used for frying food at a school lunch center.
was installed, and a continuous-over test was conducted.

As a result, when the molded filter material A of the present invention was attached, it was possible to filter 5 klips for 6 hours, but when the conventional molded P material B was attached, it was not possible to filter 1, 8 klips for 8 hours. . The end point of filtration was defined as the time when the filtration rate became 1'/min or less.

Example 1 shows that according to the molded p material of the present invention, the conventional molded p material
It was shown that the pressure was lower, the overspeed was larger, and the clarity was better than that of the wood, indicating that the passing ability was several steps higher. Further, Example 2 demonstrated that the present invention improved the filtration ability by nearly twice as much, and was superior to the conventional method.

(Effects of the Invention) The molded p material of the present invention is used only for liquid filtration in the examples.
Naturally, it can also be applied to gas transients. Molded p-materials are characterized by being able to prolong their life by removing impurities not only on the surface but also inside. However, if the surface is clogged with impurities, the rate-limiting effect will be reached even if the inside is not clogged. As a result, the pressure loss increases rapidly (in the case of a pressurized type, the pressure rises), making filtration impossible. According to the molded spruce material of the present invention, the surface area is significantly larger than that of conventional materials, so the transient life is almost twice as long.

At the same time, the rate of surface clogging due to impurities is lower than that of conventional products, so the transient speed is faster even at the same pressure. In other words, it is possible to satisfy both the requirements of - extending the overlife and - increasing the overspeed, and with the same one-time machine, the purpose can be achieved with one less time. Furthermore, due to the extension of the temporary life, the number of replacements of the molded P material can be reduced. Application of the present invention to a molding material temporary machine brings about effects such as a reduction in labor, a reduction in power cost, and a reduction in equipment and tool costs.

[Brief explanation of drawings]

FIG. 1 is a side view of a molded p-material according to an example of the present invention, FIG. 2 is a top view of the molded p-material of FIG. 1, and FIG. 3 is a side view of an edible oil filter. 1... Molded body 2... Cylinder for support (porous tube) 3... Cut 4... Vertical groove 5...
Edible oil passer 6...Oil supply lower 20 mesh wire mesh 8...5o mesh wire mesh 9...Oil tank
10... Pump 11... Molding material Fig. 1 Fig. 2

Claims (1)

[Scope of Claims] 1. A liquid-permeable disc-shaped molded product with a hole in the center cut diagonally at the upper and lower corners of the circumference, and a plurality of abacus bead-shaped molded products stacked together. A molded filter medium comprising a strong cylinder with a large number of holes inserted in the center as a support. 2. In the shaped filter medium according to claim 1, 1
When the maximum thickness of a sheet of molded body is T and the diameter is D, D/T
It ranges from -3 to 10, and when the center hole diameter is d, D
/d-3 to 10 and further has an angle α of 10 to 90 degrees at both left and right ends of the longitudinal section. a. In the molded filter medium according to claim 1 or 2, there are three or more pieces on the outer periphery of the molded body, and 1/6 to 1/6 of the radius.
A shaped filter medium having wedge-shaped or rectangular vertical grooves having a maximum width of 0.5 to 10% of the circumference in a length of 2. In the molded filter medium according to claim 1, 2, or 3, the material of the molded body is diatomaceous earth or perlite powder, granules of 0.1 to 3 mm, cellulose fiber, or wood. Shaped filter media consisting of powder or of a mixture of the above.