Preparation method of hollow flat plate structure type ceramic filter membrane element

A technology for filtering ceramics and membrane elements, which is applied in the field of preparation of hollow plate filter ceramic membrane elements to achieve uniform pore size distribution, good chemical stability, and narrow pore size distribution

Active Publication Date: 2014-03-12
雅安沃克林环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In these patent documents, alumina powder or clay is directly used as raw material in the preparation process of the flat ceramic membrane support body, and the sintering temperature is 1300-1550°C. The sintering temperature is relatively high; in addition, the flat ceramic filter membrane layer described in the patent literature is prepared by ceramic slurry spraying, sol impregnation, pulling and other methods, so that the obtained filter resistance is large, the processing flux is small, and the pore size and distribution are difficult to control, which makes it difficult for flat inorganic ceramic membrane materials to be widely used in the fields of separation, filtration and purification.

Method used

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  • Preparation method of hollow flat plate structure type ceramic filter membrane element
  • Preparation method of hollow flat plate structure type ceramic filter membrane element
  • Preparation method of hollow flat plate structure type ceramic filter membrane element

Examples

Experimental program
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Effect test

Embodiment 1

[0053] (1) Preparation of ceramic membrane support body:

[0054] Calcined aluminum hydroxide (3 μm) 72wt%, starch (0.5 μm) 8wt%, gum arabic 3wt%, polyacrylamide (molecular weight 12 million) 3wt%, polyethylene glycol (molecular weight 400) 3wt% in proportion, 11wt% of water, mixed evenly, poured into a mud refining machine for mud refining, and then put it into an airtight container to stale for 20 hours. The molding process of the ceramic membrane support adopts extrusion molding, the extrusion temperature is 10°C, and the extrusion pressure is 6MPa. After molding, the green body is dried in an oven at 50°C for 4 hours, and then further dried by microwave, and the drying time is 180s. The dried green body is sintered at 1200° C. and kept warm for 2 hours to obtain a hollow flat plate filter ceramic membrane support body.

[0055] (2) Preparation of ceramic membrane:

[0056] The average particle size (D 50 ) 1μm and 0.2μm alumina powders were baked in an oven at 120°C for...

example 1

[0058] The scanning electron micrographs of the ceramic membrane element support body, cross-section and filter membrane surface made in example 1 are shown in image 3 , 4 , 5.

Embodiment 2

[0060] (1) Preparation of ceramic membrane support body:

[0061] Calcined aluminum hydroxide (3 μm) 74wt%, starch (0.5 μm) 6wt%, gum arabic 3wt%, polyacrylamide (molecular weight 12 million) 3wt%, polyethylene glycol (molecular weight 400) 3wt% in proportion, Water and 11wt% raw materials are mixed evenly, poured into a mud refining machine for mud refining, and then put into an airtight container to stale for 20 hours. The molding process of the ceramic membrane support adopts extrusion molding, the extrusion temperature is 20°C, and the extrusion pressure is 8MPa. After molding, the green body is placed in an oven at 50°C to dry for 6 hours, and then further dried by microwaves, and the drying time is 120s. The dried green body is sintered at 1250° C. and held for 3 hours to obtain a hollow flat plate filter ceramic membrane support body.

[0062] (2) Preparation of ceramic membrane:

[0063] The average particle size (D 50 ) 1 μm and 0.2 μm zirconia powders were baked i...

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Abstract

The invention provides a preparation method of a hollow flat plate structure type ceramic filter membrane element. The method comprises the following steps: (1) preparing a hollow structure type ceramic membrane supporting body by using an extrusion molding method, namely sintering aluminum hydroxide obtained by calcination at 600 DEG C as a main raw material to prepare the ceramic membrane supporting body; (2) preparing the ceramic filter membrane by using a plasma spray method. When the ceramic membrane supporting body is prepared, the selected and used raw material is calcined aluminum hydroxide, so that the sintering temperature of the ceramic membrane supporting body can be greatly reduced, and the sufficient strength of the supporting body can be guaranteed; when the ceramic filter membrane layer is prepared, the thickness of the filter membrane can be excellently controlled by using the plasma spray process, and the filter resistance is reduced; the membrane layer has the uniform pore size distribution and the high separation accuracy; the membrane layer is closely combined with the supporting body. The ceramic filter membrane is prepared by using plasma spraying without sintering, so that the process is simple, the production cost of the ceramic filter membrane can be effectively reduced, the production efficiency is improved, and the process can be widely applied to the fields of sewage treatment and filtration, solid-liquid chemical separation, and the like.

Description

technical field [0001] The invention relates to a method for preparing a ceramic membrane element for filtering with a hollow flat plate structure, belonging to the fields of sewage treatment filtration and solid-liquid chemical separation. The present invention also relates to the filter ceramic membrane element obtained by the above method. Background technique [0002] In sewage treatment and solid-liquid chemical membrane separation devices, the separation membrane element plays a major role, which is the core of membrane separation technology. Porous inorganic ceramic membrane elements have some advantages that polymer organic separation membranes cannot match, such as high temperature resistance; good chemical stability, acid and alkali resistance and biological corrosion; high mechanical strength, pressure resistance and wear resistance; narrow pore size distribution and high separation accuracy ; It can be cleaned and regenerated repeatedly, and has a long service ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/10B01D69/06B01D69/08B01D67/00
Inventor 郭庆郭凯
Owner 雅安沃克林环保科技有限公司
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