JPS6351905A - Ceramic filter - Google Patents

Abstract

PURPOSE:To minimize the section area of raw liquid flow channel in a main body, speed up flow velocity of raw liquid, prolong the contact time of filtering face of the main body with the raw liquid and enhance filtering efficiency, by providing a fluid control component in the inside of the main body of a tubular ceramic filter. CONSTITUTION:A rod-shaped fluid control component 12 constituted with syn thetic resin or the like is provided inside a tubular ceramic filter main body 11 constituted with high purity alumina and the like. By this arrangement, the section area of a flow channel inside the main body 11 is narrowed to speed up flow velocity of raw liquid and provide a more filtering volume com pared with a case where a flow control component is not provided. Accordingly, filtering efficiency can be enhanced without enlarging the pump volume.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to improvements in ceramic filters.

[Conventional technology]

FIG. 3 shows a schematic configuration of a conventional filtration device using a ceramic filter. In FIG. 3, a stock solution container 1 stores a stock solution to be filtered. Furthermore, a tubular ceramic filter 3 is provided inside the filter container 2, through which the stock solution passes to perform cross-flow filtration.

The stock solution container 1 and the filter container 2 are connected by a stock solution circulation pipe 5 with a pump 4 interposed therebetween.

[Problem that the invention seeks to solve]

In order to increase the filtration efficiency with the above-mentioned filtration device, it is possible to increase the wave velocity of the stock solution.

However, when trying to increase the flow rate of the stock solution in a filtration device using the conventional ceramic filter 3, it is necessary to use a pump 4 with a large capacity, which poses a problem of increasing equipment costs.

The present invention was made to solve the above problems, and an object of the present invention is to provide a ceramic filter that can obtain high filtration efficiency without significantly increasing equipment costs.

[Means for solving problems]

The ceramic filter of the present invention is characterized in that a fluid control body is housed inside a tubular ceramic filter body.

In the present invention, the fluid control body can be, for example, one having a rod-like shape or one forming a spiral flow path. Further, the material of the fluid control body may be synthetic resin, ceramics, metal, rubber, etc., but it is desirable that the material does not react with the fluid, absorb the fluid, or adhere to components in the fluid.

[Effect]

According to such a ceramic filter, it is possible to reduce the cross-sectional area of the undiluted solution flow path inside the ceramic filter body to increase the flow rate of the undiluted solution, and to increase the contact time between the filtration surface of the ceramic filter body and the undiluted solution. Therefore, filtration efficiency can be increased without taking measures such as using a pump with a large capacity.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a rod-shaped fluid control body 12 made of synthetic resin and having a diameter of 13 mm is housed inside a tubular ceramic filter body 11 having an outer diameter of 19 mm and an inner diameter of 15 mm. As the ceramic filter main body 11,
The material described in Japanese Patent No. 9-48646 was used. This ceramic filter body 11 is made of high-purity alumina and has an asymmetric multilayer structure in which the pore diameter gradually increases from the filtration surface side. In this example, a filter having a pore diameter of 0.2 μm on the filtration surface side was used.

In this ceramic filter (Example 1), the cross-sectional area of the flow path is narrowed to about 1/4, so the flow rate of the stock solution is increased about 4 times.

In addition, in FIG. 2, inside a tubular ceramic filter body 21 (same as the one shown in FIG. 1) with an outer diameter of 19 mm and an inner diameter of 15 mm, there is a rod-shaped fluid control body 22 made of synthetic resin and with a diameter of 13 mm. A fluid control plate 23 made of synthetic resin is spirally attached to the periphery of the ceramic filter body 21 so as not to contact the filtration surface of the ceramic filter body 21, thereby forming a spiral flow path.

In this ceramic filter (Example 2), the cross-sectional area of the flow path is narrowed, and the undiluted solution passes through the spiral flow path, so the flow rate of the undiluted solution becomes even faster, and the filtration surface of the ceramic filter body 21 Contact time with stock solution increases.

Actually, a filtration device using a conventional tubular ceramic filter (corresponding to the ceramic filter body of Example 1.2) shown in FIG. A filtration device using each of the ceramic filters of Examples 1 and 2 was produced, and tap water was filtered. In addition, a pump with a capacity of 150 liters/win was used in all cases. Further, the circulation flow rate was 1.4 m/sec. The results are shown in FIG.

As is clear from FIG. 4, when the ceramic filter incorporating the fluid control body of Example 1.2 is used, the amount of filtration is greater than when the conventional tubular ceramic filter is used. Therefore, if the ceramic filter of the present invention is used, the capacity of the pump can be increased without increasing the capacity.
Filtration efficiency can be improved.

Note that the fluid control body that can form a spiral flow path is not limited to the one shown in FIG. 2, but may have any shape, and various modifications can be considered. The control rod may be eliminated and only a fluid control plate arranged in a spiral manner may be used, or the fluid control plate may be brought into contact with the filter body.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide a ceramic filter that provides high filtration efficiency without significantly increasing equipment costs.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a ceramic filter according to Example 1 of the present invention, Fig. 2 is a cross-sectional view of a ceramic filter according to Example 2 of the present invention, and Fig. 3 is a configuration diagram of a filtration device using a conventional ceramic filter. , FIG. 4 is a diagram showing the timeliness of filtration of tap water by a filter device using Example 1.2 of the present invention and a conventional ceramic filter. 11.21...Ceramic filter body, 12.22
...Rod-shaped fluid control body, 23...Fluid control plate. Applicant's representative Patent attorney Takehiko Suzue 1 Figure 1 Figure 2 Figure 3

Claims (3)

[Claims] (1) A ceramic filter characterized by having a fluid control body installed inside a tubular ceramic filter body. (2) The ceramic filter according to claim 1, wherein the fluid control body has a rod-like shape. (3) The ceramic filter according to claim 1, wherein the fluid control body forms a spiral flow path.