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Inorganic film tube and making method thereof

An inorganic membrane and inorganic additive technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as unsatisfactory effect of dust removal and purification in environmental protection sewage treatment, difficult manufacturing technology, and difficulty in forming and processing. , to achieve the effect of rapid purification operation, smooth surface and good thermal stability

Active Publication Date: 2014-02-12
佛山市金刚材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, from a technical point of view, the existing inorganic membranes still have the following disadvantages: high production cost, difficult manufacturing technology; High-temperature flue gas treatment, dust removal and purification are not ideal.

Method used

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  • Inorganic film tube and making method thereof
  • Inorganic film tube and making method thereof
  • Inorganic film tube and making method thereof

Examples

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preparation example Construction

[0096] Correspondingly, as figure 1 As shown, the embodiment of the present invention provides a method for preparing an inorganic membrane tube, which includes the following steps in sequence:

[0097] S101, uniformly mixing and granulating main raw materials required for preparing inorganic membrane tubes to obtain granulated material, wherein the main raw materials required for preparing inorganic membrane tubes include silicon carbide.

[0098] It should be noted that the granulated material is a plastic material.

[0099] Wherein, the main raw material formula of the inorganic membrane tube in weight percentage is as follows:

[0100] Silicon carbide 45~90%;

[0101] Inorganic additives 0~85%;

[0102] Binder 0~6%;

[0103] Plasticizer 0~2%;

[0104] Porogen 0~7%;

[0105] Water 5~25%;

[0106] The inorganic additive is SiO 2 、Al 2 o 3 , one or a combination of kaolin;

[0107] The binder is one or a combination of carboxymethyl cellulose, polyvinyl alcohol, ...

Embodiment 1

[0137] Selected raw material formula: wt%

[0138] SiC 70;

[0139] SiO 2 10;

[0140] Al 2 o 3 10;

[0141]Kaolin 10 .

[0142] After mixing evenly, add 1-2wt% carboxymethyl cellulose, 1-2wt% modified starch, 0.5wt% glycerin, 1-5wt% sawdust, 20-25wt% water and stir evenly, and granulate into plastic material on the granulator , and then extruded on an extrusion molding machine into a 19-hole channel carrier tube blank with an outer diameter of Ф30mm and an inner diameter of Ф4mm. After drying, it is fired in a gas shuttle kiln at a firing temperature of 1350~1450°C The back carrier tube body is coated with 0.2μm Al 2 o 3 After the membrane is dried, the membrane is fired at a temperature of 1100-1300°C to obtain an inorganic membrane tube.

[0143] This product is suitable for sewage treatment and filtration in the field of environmental protection.

Embodiment 2

[0145] Selected raw material formula: wt%

[0146] SiC 80 ;

[0147] SiO 2 5;

[0148] Al 2 o 3 5;

[0149] Kaolin 10.

[0150] After mixing, add 1-2wt% carboxymethyl cellulose, 1-2wt% modified starch, 0.5wt% glycerin, 1-5wt% sawdust, 20-25wt% water and stir evenly, then granulate into plastic material on the granulator , and then extruded on an extrusion molding machine into a single-hole channel carrier tube body with an outer diameter of Ф40mm and an inner diameter of Ф30mm. After drying, it is fired in a gas shuttle kiln at a firing temperature of 1350~1450°C Afterwards, the carrier tube body is coated with a 1 μm SiC film, and the film is fired at a temperature of 1100-1300 ° C to obtain an inorganic film tube.

[0151] This product is suitable for the filtration and separation of high-temperature flue gas, the purification and purification of air in certain specific environments, etc.

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Abstract

The invention discloses an inorganic film tube. The inorganic film tube is made through the extrusion molding and high temperature sintering of silicon carbide as a primary raw material. The invention also discloses a making method of the inorganic film tube. The making method comprises the following steps: uniformly mixing and granulating primary raw materials for making the inorganic film tube to obtain granules; carrying out extrusion molding of the granules in an extruder to obtain a carrier tube blank; drying and sintering the carrier tube blank; coating the sintered carrier tube blank; and drying and sintering the coated carrier tube blank to obtain the inorganic film tube. The inorganic film tube has the advantages of low cost, high strength, scour resistance, erosion resistance, high water flux, strong infiltration capacity and long service life, and is especially suitable for the sewage treatment and high-temperature flue gas filtering separation of environmental protection fields.

Description

technical field [0001] The invention relates to the technical field of inorganic ceramic membranes, in particular to an inorganic membrane tube and a preparation method thereof. Background technique [0002] With the further development of membrane technology and its application, higher and higher requirements are put forward for membrane use conditions, some of which are obviously unsatisfactory for polymer membrane materials. Therefore, people pay more and more attention to the study of inorganic membranes. Inorganic membrane is a kind of solid membrane, which is a semipermeable membrane made of inorganic materials, such as metals, metal oxides, ceramics, porous glass, zeolites, and inorganic polymer materials. [0003] In recent years, the membrane filtration industry has developed rapidly. As a type of filtration and separation membrane, inorganic membranes have many characteristics such as high temperature resistance, acid and alkali resistance, corrosion resistance, oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/04
Inventor 张效玉周耀冯斌
Owner 佛山市金刚材料科技有限公司
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