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Filter element for filtering high-temperature dust and purifying gas as well as preparation method and application thereof

A technology for dust filtration and gas purification, which is applied in chemical instruments and methods, separation methods, and dispersed particle filtration, etc. It can solve problems such as poor thermal shock resistance, difficult sealing and packaging of ceramic membrane tubes, and fractures, so as to reduce the degree of poisoning , Overcoming the difficulty of assembly and simplifying the process flow

Active Publication Date: 2011-04-13
苏州海普过滤分离科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ceramic membrane tubes have many insurmountable defects
For example, the thermal shock resistance is poor, and it is easy to break during use
In addition, the hermetic packaging of ceramic membrane tubes is more difficult
Therefore, ceramic membrane tubes cannot meet the needs of future technological development, and new high-temperature dust removal and gas purification technologies must be developed.

Method used

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  • Filter element for filtering high-temperature dust and purifying gas as well as preparation method and application thereof
  • Filter element for filtering high-temperature dust and purifying gas as well as preparation method and application thereof
  • Filter element for filtering high-temperature dust and purifying gas as well as preparation method and application thereof

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preparation example Construction

[0034] A method for preparing the above-mentioned filter element for high-temperature dust filtration and gas purification, comprising the following steps:

[0035] (1) Production of the support body 1: select the material used to make the support body 1, weigh the required support body raw material and its additives; when the selected support body raw material is a metal powder sintered material, adopt cold isostatic pressing -The support body 1 is formed by vacuum sintering, wherein the high-temperature sintering is carried out in a vacuum sintering furnace, the sintering temperature is 850-1450°C, and the sintering holding time is 1-5 hours; when the selected support body 1 is made of metal fiber sintered felt , the support body 1 is formed by a dry non-woven felting method, wherein the high-temperature sintering is carried out in a vacuum sintering furnace, the sintering temperature is 950-1350° C., and the holding time is 1-5 hours;

[0036] (2) The making of filter membr...

Embodiment 1

[0043] In this embodiment, the support body 1 is a 316L stainless steel powder sintered filter element with a diameter of 50 mm, a length of 300 mm, a wall thickness of 3 mm, and a filtration precision of 25 μm. The support body 1 is prepared by cold isostatic pressing method-high temperature vacuum sintering, wherein the pressure of cold isostatic pressing is 150Mpa, the sintering temperature is 1230°C, and the holding time is 2 hours; then, the method of vacuum spraying is used on the support The surface of the body is sprayed with a layer of filter membrane 2 with a thickness of 0.3 mm and a filtration accuracy of 8 μm; the dried workpiece is vacuum sintered at a temperature of 1100 ° C for 1.5 hours; Internally loaded denitration catalyst (V 2 o 5 -WO 3 / TiO 2 )3. The filter elements thus prepared can be further processed into components of tubular filter elements, and then assembled into filter containers, which can be used for filtering high-temperature dust and puri...

Embodiment 2

[0045] In this embodiment, the support body 1 is a Fe with a diameter of 80 mm, a length of 500 mm, a wall thickness of 3 mm, and a filtration accuracy of 30 μm. 3 Al powder sintered filter element. Support body 1 is prepared by cold isostatic pressing method-high temperature vacuum sintering, wherein the pressure of cold isostatic pressing is 200Mpa, the sintering temperature is 1250°C, and the holding time is 2 hours; The surface of the body 1 is sprayed with a layer of filter membrane 2 with a thickness of 0.3 mm and a filtration accuracy of 10 μm; the dried workpiece is vacuum sintered at a temperature of 1180 ° C for 1.5 hours; The denitration catalyst loaded in the pores (V 2 o 5 -WO 3 / TiO 2 )3. The filter elements thus prepared can be further processed into components of tubular filter elements, and then assembled into filter containers, which can be used for filtering high-temperature dust and purifying gases in thermal power generation, waste incineration, iron ...

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Abstract

The invention provides a filter element for filtering high-temperature dust and purifying gas as well as a preparation method and application thereof, wherein the filter element comprises a support body and a filtering membrane which covers the surface of the support body; a denitrification catalyst is loaded in a pore space of the support body; and the filter element can be prepared by preparingthe support body first, preparing the filtering membrane on the support body by adopting a spraying method and finally loading the denitrification catalyst in the pore space of the support body by using an impregnating method. The filter element is combined into a filter element assembly and then arranged in a filter container which can be used for filtering the high-temperature dust and purifying the gas in the fields of thermal power, refuse incineration, ferrous metallurgy or petroleum chemical industry. The filter element overcomes the defects that the ceramic filtering membranes have lowbreak strength, poor heat shock resistance and higher assembly difficulty and more difficult high-temperature sealing connection of a membrane pipe and can remarkably improve the filter efficiency and the filter precision and prolong the service life.

Description

technical field [0001] The invention relates to a filtration technology for high-temperature dust filtration and gas purification, in particular to a filter element for high-temperature dust filtration and gas purification, its preparation method and application. Background technique [0002] At present, flue gas dedusting and gas purification technologies have been widely used in many industrial production and environmental protection fields. For example, thermal power plants, municipal waste incineration, petroleum and petrochemical and iron and steel metallurgy industries will adopt various dust removal and purification technologies. However, the temperature of these industrial flue gases is generally very high, even as high as 1000°C or more. The usual technical solution is to cool the high-temperature flue gas so that the temperature of the flue gas drops below 250°C, or continue cooling to below 150°C, and then carry out medium-temperature or low-temperature bag dust ...

Claims

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Application Information

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IPC IPC(8): B01D46/00B01D53/06B01D53/90B01D53/56
Inventor 徐小平
Owner 苏州海普过滤分离科技有限公司
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