Ceramic membrane for treating dusty, poisonous and high-temperature gases and preparation method thereof

A high-temperature gas and ceramic membrane technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve problems such as secondary pollution, catalytic function attenuation, waste of sensible heat, etc., and achieve high permeability and high filtration accuracy Effect

A high-temperature gas and ceramic membrane technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve problems such as secondary pollution, catalytic function attenuation, waste of sensible heat, etc., and achieve high permeability and high filtration accuracy Effect

CN103495346AActive Publication Date: 2014-01-08SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of ceramic membrane support:

[0035] Ingredients: Mix 95 parts of 300-mesh shaped silicon carbide aggregate, 5 parts of high-temperature binder, 8 parts of charcoal with a particle size of 10mm, 6 parts of phenolic vinyl ester resin T-158#, and 0.07 parts of graphite in parts by mass. , wherein: the high-temperature binder is composed of the following raw materials in mass percentages: Suzhou soil 95% and calcite 5%.

[0036] After the raw materials are mixed evenly, they are uniformly mixed in a mixer for isostatic pressing molding at a pressure of 60 MPa; the molded support is demoulded and then heat-treated at a temperature of 1200°C for 3 hours; the ceramic membrane is obtained support body.

[0037] (2) Catalyst compounding:

[0038] Catalyst nanopowder (0.5±0.3 μm) was coated into the pores of the ceramic membrane support obtained in step (1) by dipping-sedimentation for 12 hours, with a loading capacity of 32%, wherein: the catalyst was an SCR ...

Embodiment 2

[0044] (1) Preparation of ceramic membrane support:

[0045] Ingredients: 90 parts of 200-mesh shaped silicon carbide aggregate, 10 parts of high-temperature binder, 6 parts of charcoal with a particle size of 20mm, 7 parts of phenolic vinyl ester resin T-158#, and 0.05 parts of graphite are mixed evenly in parts by mass , wherein: the high-temperature binder is composed of the following raw materials in mass percentage: Datong soil 92% and calcite 8%.

[0046] After the raw materials are mixed evenly, they are uniformly mixed in a mixer for isostatic pressing at a pressure of 80 MPa; after demoulding the formed support, heat treatment is carried out at a temperature of 1000°C and a heat treatment time of 4 hours; the ceramic membrane is obtained support body.

[0047] (2) Catalyst compounding:

[0048] Catalyst nanopowder (3±1 μm) is vacuum filtered and coated into the pores of the ceramic membrane support prepared in step (1), with a loading capacity of 35%, wherein: the c...

Embodiment 3

[0054] (1) Preparation of ceramic membrane support:

[0055] Ingredients: 70 parts of shaped corundum aggregate of 400 mesh, 30 parts of high-temperature binder, 2 parts of walnut powder with a particle size of 15mm, 1 part of phenolic vinyl ester resin T-158#, and 1 part of graphite are mixed evenly by mass , wherein: the high-temperature binder is composed of the following raw materials in mass percentage: bentonite 94% and potassium feldspar 6%.

[0056]After the raw materials are mixed evenly, they are uniformly mixed in a mixer for isostatic pressing molding at a pressure of 150 MPa; after the molded support is demoulded, heat treatment is carried out at a temperature of 1300°C and a heat treatment time of 2 hours; a ceramic membrane is obtained support body.

[0057] (2) Catalyst compounding:

[0058] Catalyst nanopowder (1.0±0.3 μm) was coated into the pores of the ceramic membrane support obtained in step (1) by immersion-sedimentation for 11 hours, with a loading ca...

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Abstract

The invention belongs to the field of inorganic nonmetal materials and particularly relates to a ceramic membrane for treating dusty, poisonous and high-temperature gases and a preparation method thereof. 90-99% by mass of ceramic membrane supporting body and 1-10% by mass of catalyst are prepared into a complex, and then, a ceramic membrane coating is spray coated on the outer surface of the complex to prepare the ceramic membrane. The catalyst is an SCR (Silicon Controlled Rectifier) denitration catalyst, and the ceramic membrane supporting body is prepared from aggregate, a high temperature binder, a pore forming agent, a forming assistant and a release agent. The preparation method is as follows: firstly, preparing the ceramic membrane supporting body, and then, compounding the catalyst in the pore of the supporting body, spray coating a layer of ceramic membrane coating material on the outer surface of the supporting body, and carrying out heat treatment to prepare a ceramic membrane material. The prepared ceramic membrane material has the advantages of high filtering precision, high permeability and erosion resistance and has dust removal and catalysis functions, thereby integrating denitration with dust removal and changing the traditional mode of gradual operation of independent operation units.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and in particular relates to a ceramic membrane for treating dust-containing toxic high-temperature gas and a preparation method thereof. Background technique [0002] Traditional dust removal technologies mainly include cyclone dust removal, bag dust removal, electrostatic dust removal, etc. These technologies have made great contributions to the control of dust emissions, but for the purification of high-temperature hot gases, traditional dust removal technologies are difficult to achieve, such as cyclone dust removal. The problem of poor separation accuracy; the pressure loss of electrostatic dust removal technology is small, but the equipment is huge, the investment is high, the dust removal efficiency is low, and it is selective to dust. Although the bag filter has high particle removal efficiency, it has poor temperature resistance (maximum service temperature 280°C) and easy...

Claims

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Application Information

Patent Timeline
08 Jan 2014
Publication
CN103495346A
IPC
B01D71/02; B01D67/00; B01D53/22
Inventors
张晓丽; 赵世凯