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Flue gas dust removal and denitration integrated catalytic ceramic filter

A ceramic filter and flue gas technology, which is applied in the direction of physical/chemical process catalyst, gas treatment, dispersed particle filtration, etc., can solve the problems that are difficult to call perfect, highly toxic and poisonous vanadium-based materials, and achieve convenient use and expand work Temperature, effects of preventing clogging and abrasion

Active Publication Date: 2017-10-13
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, the technology is still difficult to call perfect, because the vanadium-based material is highly toxic, and its toxic shortcomings still need to be overcome

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Synchronous vacuum impregnation method is used to prepare a catalytic ceramic filter integrating flue gas dust removal and denitrification

[0040] 1) Under rapid stirring, dissolve tetrabutyl titanate in ethanol, then add hydrolysis inhibitor acetic acid to obtain liquid A, the volume ratio of tetrabutyl titanate:ethanol:acetic acid is 2:7:1;

[0041] 2) Under rapid stirring, dissolve copper nitrate, iron nitrate, cerium nitrate and manganese nitrate in ethanol to obtain liquid B, the mass ratio of copper nitrate: iron nitrate: cerium nitrate: manganese nitrate: ethanol is 1:2:2 :1:15;

[0042] 3) Pour liquid B into liquid A to obtain liquid C, stir quickly, the mass ratio of tetrabutyl titanate: copper nitrate: iron nitrate: cerium nitrate: manganese nitrate is 2:1:2:2:1;

[0043] 4) Submerge the tubular porous cordierite ceramics into liquid C, place in a vacuum impregnation device, the vacuum degree is 450Pa, the immersion time is 2h, the number of immer...

Embodiment 2

[0046] Example 2: Synchronous vacuum impregnation method is used to prepare a catalytic ceramic filter integrating flue gas dust removal and denitrification

[0047] 1) Under rapid stirring, dissolve tetrabutyl titanate in ethanol, then add hydrolysis inhibitor acetic acid to obtain liquid A, the volume ratio of tetrabutyl titanate:ethanol:acetic acid is 2:7:1;

[0048] 2) Under rapid stirring, dissolve copper nitrate, iron nitrate, cerium nitrate and manganese nitrate in ethanol to obtain liquid B, the mass ratio of copper nitrate: iron nitrate: cerium nitrate: manganese nitrate: ethanol is 1:2:2 :1:15;

[0049] 3) Pour liquid B into liquid A to obtain liquid C, stir quickly, the mass ratio of tetrabutyl titanate: copper nitrate: iron nitrate: cerium nitrate: manganese nitrate is 2:1:2:2:1;

[0050] 4) Immerse the tubular porous mullite ceramics into liquid C, place it in a vacuum impregnation device, the vacuum degree is 750Pa, the immersion time is 2h, and the number of im...

Embodiment 3

[0053] Example 3: Synchronous vacuum impregnation method is used to prepare a catalytic ceramic filter integrating flue gas dust removal and denitrification

[0054] 1) Under rapid stirring, dissolve tetrabutyl titanate in ethanol, then add hydrolysis inhibitor acetic acid to obtain liquid A, the volume ratio of tetrabutyl titanate:ethanol:acetic acid is 2:7:1;

[0055] 2) Under rapid stirring, dissolve copper nitrate, iron nitrate, cerium nitrate and manganese nitrate in ethanol to obtain liquid B, the mass ratio of copper nitrate: iron nitrate: cerium nitrate: manganese nitrate: ethanol is 1:2:2 :1:15;

[0056] 3) Pour liquid B into liquid A to obtain liquid C, stir quickly, the mass ratio of tetrabutyl titanate: copper nitrate: iron nitrate: cerium nitrate: manganese nitrate is 2:1:2:2:1;

[0057] 4) Immerse the tubular porous silicon carbide ceramics into liquid C, place it in a vacuum impregnation device, the vacuum degree is 1000Pa, the immersion time is 2h, and the num...

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Abstract

The invention discloses a flue gas dust removal and denitration integrated catalytic ceramic filter which takes porous ceramics coated and adhered or wound with ceramic fiber composite membranes as carriers; iron, copper, cerium, manganese and titanium oxides or composite oxides are loaded in pores of the porous ceramics as denitration active components; a preparation method of the flue gas dust removal and denitration integrated catalytic ceramic filter can be realized by adopting a synchronous vacuum impregnation method, a step-by-step vacuum impregnation method, a co-precipitation method, a sol-gel method and other methods. The filter disclosed by the invention can remove dust and nitrogen oxides in high-temperature flue gas at the same time, is hypotoxic or non-toxic and wide in applicable temperature range and prevents the dust in the flue gas from blocking and abrading the active components. The best denitration efficiency can be achieved at different temperatures within the temperature range of 150-400 DEG C, so that the working temperature of denitration is greatly expanded. The flue gas dust removal and denitration integrated catalytic ceramic filter disclosed by the invention can be used for controlling the discharge of the dust and the nitrogen oxides in the processes of thermal power, steel, glass, ceramics, cement, nonferrous metals, petrochemical, chemical, waste incineration and the like.

Description

technical field [0001] The invention relates to a flue gas dust removal and denitrification integrated catalytic ceramic filter capable of simultaneously removing dust and nitrogen oxides in flue gas and a preparation method thereof. Background technique [0002] In recent years, large-scale smog has continued to occur in most parts of my country, causing serious harm to human health and becoming a social focus, hot spot, and major livelihood issue. The main reason for the formation of smog is the high concentration of PM2.5 in the air, and sulfur dioxide, nitrogen oxides, smoke dust, etc. are the main pollutants that form PM2.5 in the air. Therefore, it is very important to accelerate the development of denitrification and dust removal technologies in industries such as thermal power, steel, glass, ceramics, cement, nonferrous metals, petrochemicals, chemicals, and waste incineration. [0003] At present, selective catalytic reduction technology (SCR) has become a research...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/56B01D46/54B01J23/889
CPCB01D46/543B01D53/8628B01D2255/2065B01D2255/20707B01D2255/2073B01D2255/20738B01D2255/20761B01D2258/0283B01J23/8892
Inventor 马朝霞裘吕超杨杭生王响薛友祥赵世凯
Owner ZHEJIANG UNIV
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