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Multifunctional catalyst for denitration, dust removal and dioxin removal as well as preparation method and application thereof

A technology for removing dioxins, denitration and dust removal, applied in chemical instruments and methods, chemical elements of heterogeneous catalysts, physical/chemical process catalysts, etc., can solve the problems of large equipment footprint, practicability and applicability of flue gas treatment Problems such as limiting and increasing the amount of catalyst wear

Inactive Publication Date: 2020-06-12
SHANDONG AIREP ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the denitrification, dust removal and dioxin removal processes of flue gas are separated, and independent special equipment is required for processing, and the equipment occupies a large area, which makes the practicability and applicability of flue gas treatment suffer. limit
At the same time, in the treatment process in the prior art, the denitrification device or the dioxin removal device is generally installed before the dust removal device, and the high dust flue gas will increase the wear of the catalyst, thereby reducing the service life of the catalyst

Method used

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  • Multifunctional catalyst for denitration, dust removal and dioxin removal as well as preparation method and application thereof
  • Multifunctional catalyst for denitration, dust removal and dioxin removal as well as preparation method and application thereof
  • Multifunctional catalyst for denitration, dust removal and dioxin removal as well as preparation method and application thereof

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preparation example Construction

[0039] The present invention also provides a preparation method of the multifunctional catalyst described in the above technical scheme, comprising the following steps (such as figure 1 shown):

[0040] will V 2 o 5 -MoO 3 -TiO 2 The catalyst, water, dispersant, binder, defoamer and tetrafluoroethylene solution are mixed to obtain a slurry containing the catalyst;

[0041] The slurry is coated on a filter cloth and calcined to obtain the multifunctional catalyst.

[0042] The present invention will V 2 o 5 -MoO 3 -TiO 2The catalyst, water, dispersant, binding agent, defoamer and tetrafluoroethylene solution are mixed to obtain a slurry containing the catalyst; in the present invention, the mixing is preferably carried out under stirring conditions; the stirring time is preferably It is 10-20 h, more preferably 12-18 h, and most preferably 14-16 h; the present invention does not have any special limitation on the stirring rate, and it can be carried out at a rate well ...

Embodiment 1

[0048] 100g V 2 o 5 -MoO 3 -TiO 2 Catalyst (V 2 o 5 、MoO 3 and TiO 2 The mass ratio is 4.5:6:89.5), 100g of water, 0.1g of polymaleic acid and 50g of silica sol were mixed for 12h under stirring conditions, and then 1g of polyether modified polysiloxane and 5g of tetrafluoroethylene solution were added, obtaining a slurry comprising the catalyst;

[0049] 9g of the slurry containing the catalyst is coated on a 20g filter cloth, dried at 80°C for 12h, and then calcined (200°C, 3h) to obtain 24.5g of the multifunctional catalyst, which is denoted as catalyst one (increase of filter cloth) The weight ratio is 22.5%).

Embodiment 2

[0051] 100g V 2 o 5 -MoO 3 -TiO 2 Catalyst (V 2 o 5 、MoO 3 and TiO 2 The mass ratio is 4.5:6:89.5), 150g water, 0.1g polymaleic acid and 50g silica sol were mixed under stirring conditions for 12h, then added 1g polyether modified polysiloxane and 5g tetrafluoroethylene solution, obtaining a slurry comprising the catalyst;

[0052] 6.4g of the slurry containing the catalyst is coated on a 20g filter cloth, dried at 80°C for 12h, and then calcined (200°C, 3h) to obtain 23.2g of the multifunctional catalyst, which is denoted as catalyst two (filter cloth Weight gain was 16%).

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Abstract

The invention relates to the technical field of catalysts, in particular to a multifunctional catalyst for denitration and dust removal of dioxin as well as a preparation method and application of themultifunctional catalyst. The multifunctional catalyst provided by the invention is prepared from the following raw materials: filter cloth and slurry containing the catalyst; the slurry is preparedfrom the following components in parts by weight: 100 parts of a V2O5-MoO3-TiO2 catalyst, 100 to 350 parts of water, 0.1 to 0.2 part of a dispersing agent, 50 to 80 parts of a binding agent, 0.1 to 1part of a defoaming agent and 1 to 3 parts of a tetrafluoroethylene solution, wherein the mass concentration of tetrafluoroethylene is 5%, and the mass ratio of the filter cloth to the slurry containing the catalyst is 20:(3-9). The multifunctional catalyst provided by the invention can integrate denitration, dust removal and dioxin removal, the denitration efficiency reaches 79% or above, the dust removal efficiency reaches 99% or above, and the highest dioxin removal rate can reach 99.5% or above.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a multifunctional catalyst for denitrification, dust removal and dioxin removal, as well as its preparation method and application. Background technique [0002] At present, the denitrification, dust removal and dioxin removal processes of flue gas are separated, and independent special equipment is required for processing, and the equipment occupies a large area, which makes the practicability and applicability of flue gas treatment suffer. limit. At the same time, in the treatment process in the prior art, the denitrification device or the dioxin removal device is generally installed before the dust removal device, and the high-dust flue gas will increase the wear amount of the catalyst, thereby reducing the service life of the catalyst. Therefore, how to obtain a multifunctional catalyst that integrates denitrification, dust removal and dioxin removal has become the focus o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01D53/86B01D53/56B01D53/44B01D46/02
CPCB01D46/02B01D53/8628B01D53/8687B01D2258/0283B01J23/002B01J23/28B01J2523/00B01J2523/41B01J2523/47B01J2523/55B01J2523/68
Inventor 荣卫龙郭勇任骞边波盛守祥巩晓
Owner SHANDONG AIREP ENVIRONMENTAL TECH CO LTD
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