External support disc type ceramic membrane and preparation method thereof
A technology of external support and ceramic membrane, which is applied in the field of membrane separation, can solve the problems of short permeation distance and unfavorable performance of high permeation flux characteristics of dish-type ceramic membrane, so as to reduce permeation resistance, reduce membrane fouling, improve yield and The effect of generating efficiency
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Embodiment 1
[0035] The preparation method of a kind of outer support dish type ceramic membrane of this embodiment, its steps are as follows:
[0036] (1) Preparation of materials, using spinning method to prepare disc monomer 1
[0037] (1-1) Mix 50kg of alumina powder (average particle size 40μm) with 4kg of starch and 2.5kg of hydroxypropyl methylcellulose in a mixer to form a uniform mixed powder, and then put the mixed powder into the kneader In the mud machine, add 12kg water, 2kg glycerin, 0.5kg polyvinyl alcohol, knead into mud, and after 0.5 weeks of staleness, plastic mud will be formed;
[0038] (1-2) Add the above-mentioned plastic clay into a gypsum mold, spin it with a spinning machine, dry it at room temperature for 1 to 2 hours until it can be demoulded, take it out, and cut it when it is dry to a certain extent and has operable strength and so on; and then treated at a temperature of 60-90°C until completely dry to obtain the disc monomer 1;
[0039] The diameter of dis...
Embodiment 2
[0046] The preparation method of a kind of outer support dish type ceramic membrane of this embodiment, its steps are as follows:
[0047] (1) Prepare materials, adopt dry pressing method to prepare disc monomer
[0048] (1-1) Add 50kg of alumina powder (average particle size 20μm) and 2.5kg of starch, 1.5kg of hydroxypropyl methylcellulose, and 15kg of water into a ball mill and mix them into a uniform mixed slurry, which is spray-dried to form Powder with a water content of 3% and moderate fluidity;
[0049] (1-2) Using layer-by-layer distributing, the above-mentioned powder is spread into a stainless steel mold, and a 200-ton hydraulic tablet press is used for dry pressing to obtain a disc monomer 1 (the structure and size are the same as in Example 1. );
[0050] (2) Preparation of disc ceramic membrane support body
[0051] The above-mentioned two disk monomers are connected with the inner surfaces (the outer edges of the annular groove 4 are in contact with each other...
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Abstract
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