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Ceramic filter

A ceramic filter and filter membrane technology, which is applied in the direction of filtration separation, dispersed particle filtration, chemical instruments and methods, etc., can solve problems such as filter membrane cracks

Active Publication Date: 2006-04-26
NGK INSULATORS LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, according to the ceramic filter described in JP-A-2000-342920, defects such as cracks may sometimes occur on the filter membrane formed at the corners of the inner wall surface of the compartment, and it is desired to develop such a membrane that the generation of defects is suppressed, Manufacturing of ceramic filters with improved productivity

Method used

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Embodiment 1

[0047] As the aggregate, use screened alumina with a particle diameter of 30-100 μm, add feldspar with a particle diameter of 0.5-5 μm as a sintering aid, water as a dispersion medium, and methyl cellulose as an organic binder. The kneaded clay was extruded to obtain a honeycomb-shaped molded body having a plurality of main channels. After the molded body is dried, it is cut into a predetermined length perpendicular to the direction of the flow path, and is sintered to obtain 61 columns with an inner diameter of 180mm, a flow path with an inner diameter of 2.5mm, and a length of 1000mm. One row has a maximum of 53 main flow rows. , The whole main channel is about 2200 honeycomb-shaped porous bodies. In addition, the porosity of the porous body measured by the JIS dipping method was 40%, and the average pore diameter of the porous body measured by the mercury porosimetry was 20 μm.

[0048] Next, six rows of enlarged slit-shaped auxiliary flow paths were formed in the center o...

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Abstract

The invention relates to a ceramic filter used for filtering liquid, gas and other fluids. The ceramic filter of the present invention is a ceramic filter (1) composed of a porous body (2) and a filter membrane (5). The cross-sectional shape is arranged in a row in a predetermined pattern, and the cross-sectional shape of the specific partition (18) perpendicular to the direction of the fluid to be purified or the flow path of the purified fluid is surrounded by a shape formed by two parallel straight lines separated by a predetermined interval. The shape of the first specific main flow path (3a) perpendicular to the flow path direction of the purified fluid or purified fluid is a heptagonal or polygonal shape configured in a predetermined state, and θ1, θ2, θ3, θ4 In the range of 110° to 160°, A and B satisfy the relationship of 0.3B≤A≤0.7B, no defects such as cracks occur on the filter membrane, and the output rate is improved.

Description

technical field [0001] The present invention relates to a ceramic filter used for filtering fluids such as liquids and gases, and more specifically, to a ceramic filter which does not produce defects such as cracks on the filter membrane and improves the output rate. Background technique [0002] Compared with polymer membranes, ceramic filters have excellent physical strength and durability, high reliability, and excellent corrosion resistance. In addition, since the pore size that determines the filtration capacity can be precisely controlled, it is used as a filter for solid-liquid separation. Filters etc. are useful. [0003] Ceramic filters use ceramic porous bodies processed into various shapes such as flat plates and tubes as filter materials for filtration, but the filtration area per unit area is large and the filtration capacity is high. figure 2 A plurality of channels (compartments) 23 for raw liquid (fluid to be purified) are formed on a porous body 22 composed...

Claims

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Application Information

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IPC IPC(8): B01D39/20B01D46/00
Inventor 山田知广
Owner NGK INSULATORS LTD
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