Preparation method of rare-earth-based composite multi-component denitrification and dioxin removal catalyst

A dioxin removal, multi-component technology, applied in separation methods, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as high cost, harmful by-products, and complex mercury removal technology and processes

Active Publication Date: 2014-12-24
山东信义汽车配件制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] But for flue gas mercury removal, gaseous elemental Hg 0 The removal of mercury pollution in flue gas is always a difficult point
[0013] Existing mercury removal technologies such as activated carbon adsorption, chemical precipitation and many other technologies can achieve the purpose of mercury removal, but the mercury removal technology is relatively complicated, the cost is relatively high, and even other harmful by-products will be produced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] A preparation method of a rare earth-based composite multi-component denitrification and dedioxin catalyst, using titanium dioxide (titanium dioxide) and silicon powder as carriers, and using ammonium metatungstate, ammonium metavanadate, cerium nitrate and lanthanum nitrate as active groups It is made by kneading, kneading, molding, drying and roasting accompanied by auxiliary materials; wherein the auxiliary materials include monoethanolamine, citric acid, ammonia water, lactic acid, stearic acid, glass fiber, polymer fiber RP-CHOP , hydroxypropyl methylcellulose, polyethylene oxide and water.

[0078] Specific programs include:

[0079] (1) Preparation of active components: Add 40 liters of water into the active dissolving tank, add 10 kg of monoethanolamine into the dissolving tank, and when the temperature reaches 85°C, add 10 kg of ammonium metavanadate and 35 kg of tungsten Add ammonium acid into the dissolution tank and stir evenly until all of them are dissolv...

Embodiment 2

[0095](1) Preparation of active components: Add 60 liters of water into the dissolving tank, add 15 kg of monoethanolamine into the dissolving tank, and when the temperature reaches 95°C, add 115 kg of ammonium metavanadate and 45 kg of metatungstic acid Add ammonium into the dissolving tank, and stir evenly for 50 minutes until all of them are dissolved to obtain active solutions of ammonium metavanadate and ammonium metatungstate;

[0096] Add another 50 liters of water to the dissolving tank, then add 25 kg of citric acid into the dissolving tank and stir for 6 minutes, then add 12 kg of cerium nitrate into the dissolving tank and wait until completely dissolved, then add 12 kg of lanthanum nitrate to dissolve In the tank, after being completely dissolved, cerium nitrate and lanthanum nitrate active solutions are obtained;

[0097] (2) Preparation of carrier impregnation solution: Add 450 liters of water into the impregnation tank, then add the prepared active solution...

Embodiment 3

[0114] A preparation method of a rare earth-based composite multi-component denitrification and dedioxin catalyst, using titanium dioxide (titanium dioxide) and silicon powder as carriers, applying advanced preparation technology, and mixing ammonium metatungstate, ammonium metavanadate, cerium nitrate and nitric acid As the active component, lanthanum is configured into a solution according to a certain ratio, and the active material is loaded onto the titanium dioxide carrier by impregnation method, and then auxiliary materials such as lubricant, binder, plasticizer, and molding agent are added, and the whole is extruded. Utilize the synergistic coupling effect between rare earth elements and active substances, optimize the material structure, improve the adsorption balance relationship of catalytic materials to different gases, and realize simultaneous denitration and dedioxin removal. Auxiliary materials include: monoethanolamine, citric acid, ammonia water, lactic acid, st...

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PUM

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Abstract

The invention discloses a preparation method of a rare-earth-based composite multi-component denitrification and dioxin removal catalyst. According to the preparation method, titanium dioxide (titanium white) and silicon powder as carriers and ammonium metatungstate, ammonium metavanadate, cerous nitrate and lanthanum nitrate as active components, the steps of mixing, kneading, molding, drying and roasting are carried out in the presence of auxiliary materials to prepare the catalyst, wherein the auxiliary materials include monoethanolamine, citric acid, ammonium hydroxide, lactic acid, stearic acid, glass fibers, macromolecular polymer fibers RP-CHOP, hydroxypropyl methyl cellulose, polyoxyethylene and water. The prepared catalyst can simultaneously decompose nitric oxides and dioxin and can improve the mercury removal efficiency of the existing smoke control device. The prepared catalyst is not only applicable to new power plants, but also suitable for the modification of a wet-method desulphurization device of an old power plant, 80 to 95 percent of HgO generated in a coal burning power plant can be oxidized to Hg<2+> by utilizing the prepared catalyst, and a majority of particle-state Hg<2+> can be removed by utilizing a dust removal device.

Description

technical field [0001] The invention relates to a honeycomb ceramic catalyst in the technical field of environmental protection, in particular to a preparation method of a rare earth-based composite multi-component denitrification and dedioxin catalyst, and the product prepared by the method is especially suitable for thermal power plants and glass factories , chemical plants and other fields of smoke and dust purification. Background technique [0002] Nitrogen oxides and mercury are one of the main components that cause air pollution and heavy metal pollution. It is not only harmful to the human body, but also pollutes the environment. [0003] According to the requirements of "Nitrogen Oxide Emission Standards for Thermal Power Plants" (Second Discussion Draft), SCR denitrification catalyst must be installed to meet the emission requirements of 100mg / Nm3 for new units or old units in key areas, and 200mg / Nm3 for non-key areas emission requirements. At present, the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01D53/86B01D53/56B01D53/70B01D53/64
Inventor 延晓峰杜德亮王庆庆
Owner 山东信义汽车配件制造有限公司
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