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A combined flat honeycomb ceramic membrane and its preparation method

A honeycomb ceramic and combined technology, which is applied in the field of membrane separation, can solve the problems of increased difficulty in the preparation of ceramic membrane separation layers, insufficient overall strength of ceramic membranes, and increased cost of ceramic membranes, so as to reduce membrane pollution, facilitate replacement, and reduce fractures. effect of possibility

Active Publication Date: 2019-06-04
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) The overall strength of the ceramic membrane is not enough
Although the bending strength of the membrane material does not change, the ceramic membrane can withstand less pressure due to the smaller thickness of the support and is easy to break
[0005] (3) The membrane area per unit volume is small
[0006] (4) The difficulty of preparing the ceramic membrane separation layer increases
For this reason, plasma spraying has also been researched and developed to prepare separation membranes, but the cost of ceramic membranes has been significantly increased; while compressed air is used as the air source to prepare membranes by spraying. Under the blowing of compressed air, the membranes are easy to dry out quickly to crack

Method used

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  • A combined flat honeycomb ceramic membrane and its preparation method
  • A combined flat honeycomb ceramic membrane and its preparation method
  • A combined flat honeycomb ceramic membrane and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] figure 1 and figure 2 Shown is an embodiment of a combined flat honeycomb ceramic membrane of the present invention, which is composed of flat honeycomb ceramic membrane units. Such as figure 1As shown, the flat-shaped honeycomb ceramic membrane unit is in the shape of a narrow plate with a width W of 7-15 cm and a length of 1-1.2 m, and the edge shapes on both sides are center-rotationally symmetrical. The cross-sectional shape of the edge of the side is one of straight lines, arcs, curves, folded lines or a combination thereof.

[0038] The flat-shaped honeycomb ceramic membrane unit is composed of a support body 1 and separation membrane layers located on the upper and lower surfaces of the support body. Such as figure 1 As shown, the support body 1 has single or double rows of permeate channels 2 in the middle, and the width of a single permeate channel 2 is 3 mm and the height is 1 mm. For the flat-shaped honeycomb ceramic membrane unit with a single row of p...

Embodiment 2

[0042] In this embodiment, a method for preparing a combined flat honeycomb ceramic membrane is composed of the flat honeycomb ceramic membrane units of Embodiment 1, wherein the preparation of the flat honeycomb ceramic membrane unit is as follows:

[0043] (1) Extrusion molding method to prepare the support body of flat honeycomb ceramic membrane unit

[0044] After mixing 50kg of alumina powder (average particle size of 40μm), 4kg of starch, and 2.5kg of hydroxypropyl methylcellulose in a mixer, add 2kg of glycerin, 0.5kg of polyvinyl alcohol, and 9kg of water in a kneader. Knead into mud in medium, after stale for 1 week, extrude into shape through horizontal extruder, then dry in constant temperature and humidity drying box (temperature is 80°C, humidity is 90%) for 24h, and calcined at 1650°C for 4h to get the average The support body of the flat-shaped honeycomb ceramic membrane unit with a pore size of 4.2 μm and center-rotational symmetry at both ends;

[0045] (2) I...

Embodiment 3

[0049] The preparation method of a combined flat-plate honeycomb ceramic membrane in this embodiment is different from Example 1 in that the preparation of the flat-shaped honeycomb ceramic membrane unit is as follows:

[0050] (1) Extrusion molding method to prepare the support body of flat honeycomb ceramic membrane unit

[0051] After mixing 50kg of alumina powder (average particle size of 10μm), 4kg of starch, and 3.0kg of hydroxypropyl methylcellulose in a mixer, add 2kg of glycerin, 0.75kg of polyvinyl alcohol, and 9kg of water in a kneader. Knead into mud in medium, after stale for 2 weeks, extrude into shape by horizontal extruder, then dry in constant temperature and humidity drying box (temperature is 80°C, humidity is 90%) for 24h, and calcined at 1550°C for 4h to get the average The support body of the flat-shaped honeycomb ceramic membrane unit with a pore size of 1.2 μm and center-rotational symmetry at both ends;

[0052] (2) Inkjet printing method to prepare t...

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Abstract

The invention discloses a combined plate honeycomb ceramic membrane which consists of plate-shaped honeycomb ceramic membrane units in a combined manner, wherein the honeycomb ceramic membrane units take the shape of a narrow plate; edges on two sides of the honeycomb ceramic membrane units are shaped in a central rotational symmetric manner; the honeycomb ceramic membrane units are spliced together through the sides in a width direction. In addition, the invention further discloses a preparation method of the combined plate honeycomb ceramic membrane. As plate-shaped honeycomb ceramic membrane plates are taken as units, the honeycomb ceramic membrane of a large size and different shape and structure can be prepared in the combined manner, and the combined plate honeycomb ceramic membrane is flexible to combine and convenient to replace. With respect to a preparation process, only the plate-shaped honeycomb ceramic membrane units need to be prepared, so that the molding difficulty and the possibility of support defects can be greatly reduced, and in addition, continuous extrusion can be achieved, the efficiency is high, and the possibility that the plate honeycomb ceramic membrane is deformed in the later drying and calcining process can be reduced.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a flat honeycomb ceramic membrane and a preparation method thereof. Background technique [0002] Membrane separation technology has been known internationally as one of the most promising high-tech applications in the 21st century. Ceramic membrane is a new generation of membrane separation technology, based on Al 2 o 3 , ZrO 2 、TiO 2 , SiO 2 , SiC and other raw materials are made by a series of special processes and have a porous structure. Ceramic membranes are classified into tubular, multi-channel, and flat plates according to their shapes. Different from the traditional tubular and multi-channel ceramic membranes, the flat ceramic membrane adopts external pressure filtration, the outer surface of the ceramic membrane is the separation layer, and the membrane pores are the permeate channels. Due to the eggshell effect, with this structure, for ultra-thin f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/08B01D71/02B01D67/00
CPCB01D63/081B01D67/0039B01D71/02
Inventor 常启兵王霞汪永清杨柯杨玉龙张小珍周健儿
Owner JINGDEZHEN CERAMIC UNIV
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