CN1555903A - Ceramic filter tube membrane material and membrane covering technology - Google Patents
Ceramic filter tube membrane material and membrane covering technology Download PDFInfo
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- CN1555903A CN1555903A CNA2004100258166A CN200410025816A CN1555903A CN 1555903 A CN1555903 A CN 1555903A CN A2004100258166 A CNA2004100258166 A CN A2004100258166A CN 200410025816 A CN200410025816 A CN 200410025816A CN 1555903 A CN1555903 A CN 1555903A
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- ceramic filter
- filter tube
- pore
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- footpath
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- Compositions Of Oxide Ceramics (AREA)
Abstract
A process for coating film on the filtering ceramic pipe includes proportionally mixing mullite powder, ammonium polyacrylate, potato starch and ion exchange water to obtain slurry, coating, drying and calcining. Its advantages are not cracking, high gas permeability and mechanical strength, and good refractory nature. `
Description
Affiliated technical field the present invention relates to a kind of ceramic filter tube coating materials and coating technique.
Background technology is at the coal gasification power field, and ceramic filter tube is with its good hear resistance and chemical stability and enjoy favor, particularly wherein a kind of ceramic filter tube that is called as anisotropic membrane, and it has played great impetus to the development of screen pipe.In the practice, the pore footpath of generally wishing screen pipe is less than the particle of wanting to catch, because of the pressure loss and the pore size directly that filtering material produced is inversely proportional to, so the pore of screen pipe footpath is as diminishing, it is big that the pressure loss just becomes easily, in order to reduce the pressure loss, just need on screen pipe, to cover a skim, and the thickness of film is thin as far as possible, but fragile material is made as thin as a wafer film, industrial extremely difficult the realization can shrink when sintering still more, can produce be full of cracks.
Summary of the invention purpose of the present invention will provide a kind of ceramic filter tube coating materials and coating technique exactly, and it adopts the material after sintering shrinks to make coating materials, can not produce be full of cracks when reburning knot, and integrality is good, gas permeation rate height, good heat resistance, mechanical strength height.
For achieving the above object, the technical scheme that the present invention takes is: a kind of ceramic filter tube coating materials and coating technique is characterized in that: the weight ratio of its composition is: 10 parts in 200 purpose mullite powder; 0.05 part of dispersant; 2 parts of bonds; Its coating technique process is: the raw material that will prepare is according to the above ratio put into 100 parts ion exchange water, as slurry, and then distinguishes starching by the pore of the ceramic filter tube matrix footpath and the different situations of the ratio of waiting to do film pore footpath; When wait to do film pore footpath less than ceramic filter tube matrix pore footpath 1/3 the time, must get above-mentioned slurry, make than bigger granular in matrix pore footpath, carry out preroast then, ready-made granule powder is scattered in the water, it is covered on the ceramic filter tube matrix then, be dried sintering then, and then the slurry of coating thereon, carry out drying and sintering again and get final product; When wait to do film pore footpath more than or equal to ceramic filter tube matrix pore footpath 1/3 the time, directly starching is carried out drying and sintering again and is got final product.
The invention is characterized in that described dispersant is an ammonium polyacrylate;
Another feature of the present invention is that described bond is a mealy potato;
The present invention is owing to adopt technique scheme, and particularly it adopts the material behind the sintering to make film, so the feasible ceramic filter tube of making can not produce be full of cracks, integrality is good, the gas permeation rate height, and good heat resistance, the mechanical strength height, thermal stress resistance, and the industrialization cost is low;
Specific embodiment: embodiment 1, take by weighing 200 purpose mullite powder double centners by weight, 0.5 kilogram of ammonium polyacrylate, 20 kilograms of mealy potatos, the ion exchange water of above-mentioned three kinds of raw materials being put into 1000 kilograms stirs, the pore of the film that this moment is to be done directly is 10 microns, the pore of ceramic filter tube matrix is 32 microns directly, gets the above-mentioned slurry of part, makes the bigger granule powder in gas footpath of ceramic filter tube matrix, then the granule powder is carried out preroast, again ready-made granule powder is scattered in the water, this material is covered on the earthenware matrix, be dried sintering then, the slurry of coating thereon more afterwards, drying and sintering can form film then.
Embodiment 2: take by weighing 50 kilograms in 200 purpose mullite powder by weight, 0.25 kilogram of ammonium polyacrylate, 20 kilograms of mealy potatos, above-mentioned three kinds of raw materials are put into 500 kilograms ion exchange water, fully stir, wait that the pore of doing film directly is 15 microns this moment, the pore of ceramic filter tube matrix directly is 35 microns, get above-mentioned slurry, directly coat on the ceramic filter tube matrix, carry out drying then, sintering gets final product.
The present invention can be widely used in the coal gasification power field.
Claims (4)
1, a kind of ceramic filter tube coating materials is characterized in that: it is made of by weight following material: 10 parts in 200 purpose mullite powder, 0.05 part of dispersant, 2 parts of bonds;
2, a kind of ceramic filter tube coating materials coating technique, it is characterized in that, 10 parts in the 200 purpose mullite powder that prepare by weight, 0.05 part of dispersant, 2 parts of ion exchange waters of putting into 100 parts of bond, as slurry, and then distinguish starching by the pore of the ceramic filter tube matrix footpath and the situation of the ratio of waiting to do film pore footpath; When wait to do film pore footpath less than ceramic filter tube matrix pore footpath 1/3 the time, must get above-mentioned slurry, make earlier than bigger granular of matrix pore, carry out preroast then, ready-made granule powder is scattered in the water, then it is covered on the ceramic filter tube matrix of back, be dried sintering then, the slurry of coating thereon again carries out drying and sintering again and can form film; When wait to do film pore footpath more than or equal to ceramic filter tube matrix pore footpath 1/3 the time, directly starching is carried out drying and sintering again and is got final product.
3, a kind of ceramic filter tube coating materials as claimed in claim 1 or 2 and coating technique is characterized in that described dispersant is an ammonium polyacrylate.
4, a kind of ceramic filter tube coating materials as claimed in claim 1 or 2 and coating technique is characterized in that described bond is a mealy potato.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100258166A CN1555903A (en) | 2004-01-06 | 2004-01-06 | Ceramic filter tube membrane material and membrane covering technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100258166A CN1555903A (en) | 2004-01-06 | 2004-01-06 | Ceramic filter tube membrane material and membrane covering technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1555903A true CN1555903A (en) | 2004-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100258166A Pending CN1555903A (en) | 2004-01-06 | 2004-01-06 | Ceramic filter tube membrane material and membrane covering technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1555903A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714909B (en) * | 2005-05-11 | 2010-11-17 | 青海大学 | Method for preparing ceramic filter tube for purifying high temperature gas |
| CN108452686A (en) * | 2013-07-31 | 2018-08-28 | 曼·胡默尔有限公司 | Ceramic hollow tunica fibrosa with improved mechanical property |
-
2004
- 2004-01-06 CN CNA2004100258166A patent/CN1555903A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714909B (en) * | 2005-05-11 | 2010-11-17 | 青海大学 | Method for preparing ceramic filter tube for purifying high temperature gas |
| CN108452686A (en) * | 2013-07-31 | 2018-08-28 | 曼·胡默尔有限公司 | Ceramic hollow tunica fibrosa with improved mechanical property |
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