JPH0159002B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a molded material with increased overarea and dramatically improved overcapacity. (Prior Art) Conventional molding materials include a simple cylinder made of a mixture of pulp wood, wood flour, cotton linter fibers, or a mixture of diatomaceous earth powder, or a cylinder with vertical grooves on the outer periphery. There are those with shallowly attached disks, or those with stacked disks. Furthermore, as disclosed in Japanese Patent Application Laid-Open No. 136612/1983, there is a structure made by compression molding cellulose or synthetic fibers. (Problems to be Solved by the Invention) Such conventional molded materials have a small overarea and do not contain gaseous bodies that entrain moisture or oil, or those that contain water mixed in oil or oil mixed in water. There is a problem in that when the material is overflowing, the material becomes so-called clogged and it becomes impossible to overflow. (Means for Solving the Problems) The present invention was made to solve the above-mentioned problems of conventional molded materials, increase the overarea, and dramatically improve the overcapacity. The upper and lower corners of the circumference of an open, liquid-permeable disc-shaped molded body were cut diagonally, and multiple balls-shaped molded bodies were stacked up, with a large number of holes punched in the center to serve as a support. This invention relates to a molded material characterized by being constructed by inserting a strong cylinder. Next, a method for producing a molded material according to the present invention will be explained.
First, 0.1 to 3 mm granules of diatomaceous earth or perlite, or single or mixtures of cellulose fibers or wood flour, etc., are placed in a mold by heating or adding a binder to form a disk shape with a hole in the center. Alternatively, it is formed into the shape of an abacus to create a liquid-permeable molded body.
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 bead-shaped molded product. however,
The abacus bead shape refers to a bead 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.
In general, if the thickness of the molded object is large, the angle will be large;
If it is thin, shape it to a small angle. In the present invention, as shown in FIG. 1, the angle α (same as the angle of the longitudinal section) at both ends of each molded body is in the range of 10 to 90 degrees. A plurality of pieces of this molded body 1, usually 3 to 10 pieces,
Using a cylinder 2 having the same diameter as the center hole of the molded body 1 as a support, the molded body 1 is stacked as shown in FIG. This support cylinder 2 serves as an outlet for the liquid or ventilation after the impurities in the raw liquid or gas have passed through the surface or inside of the molded body, so it is provided with holes such as punch holes. It must have a multi-hole tube structure and at the same time be strong enough to withstand excessive pressure. Further, as shown in FIG. 1, a stack of molded bodies 1 is called a molded material, and this molded material is mainly used as a variable exchange type so-called cartridge filter. Therefore, the support cylinder 2 is made strong enough to withstand tightening during transportation and replacement. A single molded body of molded material, whether it is too thin or thick, approaches the surface area of a conventional cylinder, so when the maximum thickness of the molded body is T and the diameter is D, it is usually D/T.
= range of 3 to 10 is suitable. Further, when the diameter of the center hole is d, a range of D/d=3 to 10 is appropriate.
If d is too small compared to D, the strength etc. will be unreasonable,
If it is too large, the incision 3 shown in FIG. 1 cannot be made large, and the surface area cannot be increased. Further, the vertical grooves 4 in Fig. 2 are for further increasing the surface area, and there are usually 3 or more, preferably 3 to 20, on the outer periphery of the molded body, with a length l ₂ of 1/5 to 1/2 of the radius, The maximum width l ₃ is 0.5 to 10 of the circumference
It is more effective to provide wedge-shaped or rectangular longitudinal grooves 4 in the range of 50%. (Examples) Next, the present invention will be further explained by examples. Example 1 1 part by weight of cotton fibers and 1 part by weight of pulp fibers were added to water to which a small amount of polyester resin was added as a binder, and the mixture was thoroughly stirred and dispersed. This suspension was put into a mold, compressed and dehydrated under a load of 20 kg, and
A disk molded body with a thickness of 130 mm and a center hole diameter of 25 mm was prepared and dried. The upper and lower corners of the circumference of this molded body are ground with a grinder to a width l ₁ = 3 cm as shown in Figure 1, and then the maximum width l ₃ is 7 mm and the length is 7 mm as shown in the wedge-shaped vertical groove 4 in Figure 2. A size of _20mm was formed using a grinder. This molded body was punched with 130 holes with a diameter of 4 mm.
25mm x length 100mm x thickness 0.5mm stainless steel cylinder 2
The molded material A of the present invention was made by stacking 5 sheets. Next, 1 part by weight of cotton fiber, 1 part by weight of pulp fiber and
Molded filter medium B of the present invention was prepared in the same manner as molded filter medium A using 1 part by weight of a 0.1 to 3 mm granulated and fired diatomaceous earth product. On the other hand, a conventional molded filter material was made by stacking five of the dried disc molded bodies made in the same manner as in the case of molded filter material A, and was installed in the edible oil filter 5 shown in FIG. The comparatively dirty oil after frying was filtered, and a comparison test was conducted between molded filter media A and B and a conventional molded filter media. 18 of the used oil is put into the oil tank 9 from the oil supply port 6 through the 20-mesh wire mesh 7 and the 50-mesh wire mesh 8, and is passed through the molded filter medium 11 in the suction filter 5 by the pump 10, and then circulated. After running for 10 minutes, the circulating oil was sampled from the oil tank 9 and a comparative test of clarity was conducted.
The pressure and overspeed after 10 minutes were also measured. The results are shown in Table 1.

[Table] (Note) Clarity is the light transmittance measured by a spectrophotometer at a wavelength of 680 nm. Together,
Measurement of the translucency of sampled oil. Example 2 Using the same filtration machine as in Example 1, the same molded filter media A and B as in Example 1 and the conventional molded filter media were installed, using waste oil after being used for frying food at a school lunch center.
A continuous filtration test was conducted. As a result, when the molded filter medium A of the present invention was installed, 3.5 Kl could be filtered for 5 hours, and when the molded filter medium B was installed, the filter could be filtered for 9 hours and 6.0 Kl.
Kl could be filtered, but when a conventional molded filter medium was installed, only 1.8 Kl could be filtered for 3 hours. The end point of the overpass was when the overspeed became 1/min or less. Example 1 shows that according to the molding material of the present invention, the pressure is lower than that of the conventional molding material, the overspeed is large,
It showed that the clarity was also good, which means that the crystallization ability was improved by several steps. Further, Example 2 demonstrated that the present invention dramatically improved the overcapacity and was superior to the conventional one. (Effects of the Invention) The molding material of the present invention is applicable only to liquid molding in the embodiments, but it can also be applied to gas molding. Molded materials are characterized by being able to extend their lifespan by removing impurities not only from the surface but also from the inside. However, if the surface is clogged with impurities, the rate-limiting effect will occur even if the inside is not clogged. As a result, the pressure loss rapidly increases (in the case of pressurized overflow, the pressure increases), and overflow becomes impossible. According to the molded material of the present invention, since the surface area is exceptionally larger than that of the conventional molded material, the overlife is almost twice as long.
At the same time, the rate of surface clogging due to impurities is lower than in conventional systems, so overspeed increases even at the same pressure. In other words, it is possible to satisfy both the extension of overlife and the increase of overspeed, and the purpose can be achieved in less time if the same overage machine is used. Furthermore, due to the extended life, the number of replacements of the molded material can be reduced. Application of the molding material of the present invention to a perforation machine brings about effects such as a reduction in labor, a reduction in power cost, and a reduction in equipment and tool costs. These results are more remarkable for the molded filter medium B of Example 2. The reason for this is that in the case of only fibers, the pores in the filter medium are relatively large, but when granulated products with various particle sizes are added, the pores themselves become wider in size and can accommodate suspended substances of various particle sizes. This is because internal filtration becomes possible.

[Brief explanation of drawings]

FIG. 1 is a side view of a molded material according to an example of the present invention, FIG. 2 is a top view of the molded material shown in FIG. 1, and FIG. 3 is a side view of a cooking oil filter. 1... Molded body, 2... Support cylinder (porous tube),
3... Cut, 4... Vertical groove, 5... Edible oil filter, 6... Oil supply port, 7... 20 mesh wire mesh, 8
...50 mesh wire mesh, 9...oil tank, 10...
Pump, 11...molding material.

Claims (1)

[Scope of Claims] 1. A liquid-permeable disc-shaped molded body with a hole in the center is formed into a shape in which the top and bottom corners of the circumference are cut obliquely, and three or more holes are formed on the outer periphery of the molded body, at 1/1/2 of the radius. 5 to 1/2 length,
A strong material with wedge-shaped or rectangular vertical grooves with a maximum width in the range of 0.5 to 10% of the circumference, stacked in multiple abacus-shaped molded bodies, and with many holes drilled in the center as a support. When a cylinder is inserted and the maximum thickness of one molded body is T and the diameter is D,
D/T is in the range of 3 to 10, and when the center hole diameter is d, D/d is in the range of 3 to 10, and the angle α at both left and right ends of the longitudinal section is 10 to 90°. Molded filter media. 2. In the shaped filter medium according to claim 1, the material of the shaped body consists of 0.1 to 3 mm granular diatomaceous earth or perlite, and cellulose fiber or wood flour, or a mixture of the above. A molded filter medium featuring: