Filter felt for dedusting and purification of flue gas and preparation method

A filter felt and flue gas technology, which is applied in the field of flue gas purification, can solve the problems of high hazard, ineffective catalyst catalytic reduction, and inability to realize the integration of dust removal and denitrification, etc., and achieve the effect of prolonging the working life and good effect

Inactive Publication Date: 2018-08-21
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that most of the reducing agents used in the purification of nitrogen oxides in the prior art study their catalytic performance, while ignoring the fine dust. In practice, the fine dust itself is not only a pollutant formed by smog, but also carries a large amount of Nitrogen oxides, and the combination is tight, and the catalytic reduction effect of the catalyst is not obvious. Once this kind of fine dust enters the atmosphere, it is more harmful than pure nitrogen oxides and dust. The existing technology cannot realize the integration of dust removal and denitrification And other issues

Method used

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  • Filter felt for dedusting and purification of flue gas and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] a. Mix carbon nanotubes with ammonium metavanadate, titanium dioxide, and oxalic acid solution, and heat to prepare a catalytically active solution;

[0033] b. Immerse the silica airgel felt in the catalytically active solution of step a, take it out after 25 minutes and pre-burn it to obtain a pre-fired felt;

[0034] c. Mix and grind hydrotalcite, silicon dioxide, aluminum oxide, indium oxide, zeolite, natural clay and water, and add binder and foaming agent to make slurry;

[0035] d. Coating the slurry in step c on the surface of the calcined felt in step b, and further calcining to prepare a filter felt for flue gas dust removal and purification.

[0036] In the step b, the average thickness of the silica airgel felt is 2mm; in the step c, the adhesive is an epoxy resin adhesive; in the step c, the foaming agent is potassium bicarbonate;

[0037] In step a, the heating temperature is 45°C, and the holding time is 15 minutes; in step b, the pre-calcination tempera...

Embodiment 2

[0040] a. Mix carbon nanotubes with ammonium metavanadate, titanium dioxide, and oxalic acid solution, and heat to prepare a catalytically active solution;

[0041] b. Immerse the silica airgel felt in the catalytically active solution of step a, take it out after 20 minutes and pre-burn it to obtain a pre-fired felt;

[0042]c. Mix and grind hydrotalcite, silicon dioxide, aluminum oxide, indium oxide, zeolite, natural clay and water, and add binder and foaming agent to make slurry;

[0043] d. Coating the slurry in step c on the surface of the calcined felt in step b, and further calcining to prepare a filter felt for flue gas dust removal and purification.

[0044] In step b, the average thickness of the silica airgel felt is 3 mm; in step c, the adhesive is a phenolic resin adhesive; in step c, the foaming agent is sodium bicarbonate;

[0045] In step a, the heating temperature is 50°C, and the holding time is 10 minutes; in step b, the pre-calcination temperature is 300°C...

Embodiment 3

[0048] a. Mix carbon nanotubes with ammonium metavanadate, titanium dioxide, and oxalic acid solution, and heat to prepare a catalytically active solution;

[0049] b. Immerse the silica airgel felt in the catalytically active solution of step a, take it out after 30 minutes and pre-burn it to obtain a pre-fired felt;

[0050] c. Mix and grind hydrotalcite, silicon dioxide, aluminum oxide, indium oxide, zeolite, natural clay and water, and add binder and foaming agent to make slurry;

[0051] d. Coating the slurry in step c on the surface of the calcined felt in step b, and further calcining to prepare a filter felt for flue gas dust removal and purification.

[0052] In the step b, the average thickness of the silica airgel felt is 2mm; in the step c, the adhesive is an epoxy resin adhesive; in the step c, the foaming agent is calcium bicarbonate;

[0053] In step a, the heating temperature is 40°C, and the holding time is 20min; in step b, the pre-calcination temperature is...

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Abstract

The invention discloses filter felt for dedusting and purification of flue gas and a preparation method. The filter felt is prepared through following steps: a, carbon nano tubes are mixed with ammonium metavanadate, titanium dioxide and an oxalic acid liquid, a mixture is heated, and a catalytic active liquid is prepared; b, silica aerogel felt is subjected to mixed pre-sintering with the catalytic active liquid, and pre-sintered felt is prepared; c, hydrotalcite, silica, alumina, indium oxide, zeolite, natural clay, an adhesive, a foaming agent and water are mixed, and slurry is prepared; d,the surface of the pre-sintered felt is coated with the slurry, and after calcination, the filter felt for dedusting and purification of the flue gas is obtained. The method has the beneficial effects as follows: the surface of the pre-sintered felt is coated with the slurry for fired ceramization, a microporous ceramic membrane is prepared after ceramization under the action of the foaming agent, tiny dust in the flue gas can be effectively filtered, so that the filtered flue gas is not disturbed by the tiny dust, reduction and purification efficiency of nitrogen oxides is high, effect is good, integrated efficient operation of dedusting and denitration can be realized effectively, and service life of a catalyst is prolonged.

Description

technical field [0001] The invention relates to the field of flue gas purification, in particular to the preparation of a filter felt, in particular to a filter felt for dust removal and purification of flue gas and a preparation method thereof. Background technique [0002] At present, the formation of smog is closely related to flue gas pollution from coal-fired power stations, coal-fired industrial boilers, and coal-fired furnaces. Therefore, the pollution control of coal-burning flue gas is an important way to control atmospheric environmental pollution. The pollution of nitrogen oxides produced by it is the main cause of acid rain and smog, and is also an important factor that endangers the environment and human health. Purification of nitrogen oxides in air is imminent. [0003] At present, a large number of technologies have been applied to the pollution control of nitrogen oxides, which are mainly divided into two categories: control inside the furnace (combustion c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20B01D46/00B01D53/86B01D53/56
CPCB01D39/20B01D46/0001B01D46/0027B01D53/8625
Inventor 陈庆曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD
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