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Refractory ceramic filtering element for hot gas purification and method for preparing the same

A technology for high-temperature ceramics and filter elements, which is applied in the field of high-temperature ceramic filter elements for hot gas purification, can solve the problems of unsuitable products for industrialization promotion and application, high manufacturing cost, poor thermal stability, etc. Good thermal stability

Inactive Publication Date: 2005-01-26
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented type of filtering material used with heated gases can be made stronger by adding certain substances that are resistant against chemicals or other harmful materials found therein during combustion processes such as sulfur dioxide (SO2) emissions from power plants burning fossil fuels containing sulfides like thiols). It also provides better protection at higher temperatures than traditional filters due to its unique structure. Additionally it offers excellent durability over time without losing effectiveness because it does this through multiple layers of protective coatings on top.

Problems solved by technology

This patented describes various methods for producing filters with improved heat resistant, strong support structures, durability against extreme temperatures, and reduced environmental impacts compared to current designs. These improvements include increasing the number of layers of ceramics fibers applied during production processes, reducing costs associated with depositing these layers onto the surfaces of pores made from refractory oxide particles like aluminum nitride (AlN) powder, improving thermal insulation without losing effectiveness upon exposures towards certain gases. Additionally, there exist different types of cerarnite composites containing specific components mixed together within each component group.

Method used

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  • Refractory ceramic filtering element for hot gas purification and method for preparing the same
  • Refractory ceramic filtering element for hot gas purification and method for preparing the same
  • Refractory ceramic filtering element for hot gas purification and method for preparing the same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The composition of the raw materials used in the test is shown in Table 1.

[0033] Table 1. Raw material chemical weight percentage composition list used in the test

[0034]

[0035] The high-temperature ceramic filter element for hot gas purification according to the present invention is tubular, and the weight proportion percentage of the ceramic support body is composed of: 73% of commercially synthesized cordierite aggregate with a particle diameter of 200-400um, 23% of high-temperature ceramic binder and granular 4% charcoal pore-enhancing agent with a diameter of 100-200 μm; the weight percentage of the high-temperature ceramic binder is composed of: refractory clay 30%, potassium feldspar 25%, β-spodumene 35%, talc 10%, fineness Control over 200 mesh sieve.

[0036] The weight ingredients of the ceramic fiber composite membrane are composed of 50% of zirconium-containing aluminum silicate fibers, 20% of cordierite aggregates with a particle size of 80-120um...

Embodiment 2

[0042] In the high-temperature ceramic filter element for hot gas purification according to the present invention, the weight percentage of the ingredients of the ceramic support body is composed of:

[0043] 75% cordierite aggregate with a particle size of 300-500μm, 18% high-temperature binder, and 7% pore-enhancing agent;

[0044] Wherein, the composition weight percent of the high-temperature binder is as follows: 30% of refractory clay, 35% of potassium feldspar, 30% of β-spodumene, and 5% of talc.

[0045] The proportioning weight percentage of ceramic fiber composite membrane is composed of:

[0046] 50% zirconium-containing aluminum silicate fiber with a fiber diameter of 6 μm, 25% binder, and 25% cordierite refractory aggregate with a particle size of 80-100 μm;

[0047] Wherein, the composition weight percent of the binder is as follows: 55% of refractory clay, 25% of potassium feldspar, and 20% of talc.

[0048] Preparation:

[0049] Mix and dry the ceramic sup...

Embodiment 3

[0053] In the high-temperature ceramic filter element for hot gas purification according to the present invention, the weight percentage of the ingredients of the ceramic support body is composed of:

[0054] 80% cordierite aggregate with a particle size of 100-600μm, 18% high-temperature binder, and 2% pore-enhancing agent;

[0055] Wherein, the composition weight percent of the high-temperature binder is as follows: 25% of refractory clay, 35% of potassium feldspar, 32% of β-spodumene, and 8% of talc.

[0056] The proportioning weight percentage of ceramic fiber composite membrane is composed of:

[0057] 50% alumina fiber with a fiber diameter of 7 μm, 26% binder, and 24% cordierite refractory aggregate with a particle size of 50-100 μm;

[0058] Wherein, the composition weight percent of the binder is as follows: 60% of refractory clay, 23% of potassium feldspar, and 17% of talc.

[0059] Preparation:

[0060] The ingredients of the ceramic support are mixed and dried, ...

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Abstract

The invention is a high temperature ceramic filter element for hot gas purification, which is made up of ceramic supporter and outer ceramic fiber compound film, ceramic supporter and the ceramic fiber compound film are made up of cordierite, high temperature binder, aperture adding agent and ceramic fiber, binder, fire resisting material, it uses mechanical vibration heat pouring craft, the ceramic supporter can be fabricated through high temperature process, then the forming pulp is produced, the ceramic supporter is immersed in the pulp, and forms a ceramic filter compound layer out of the surface of the supporter, and the product can be acquired. The product has a high mechanical density, excellent heat stability, small product volume.

Description

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Claims

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Application Information

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Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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