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Rare-earth-based composite multi-component denitration and dioxin-removing catalyst and preparation method thereof

A dedioxin, multi-component technology, applied in separation methods, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve pollution and other problems

Inactive Publication Date: 2015-08-19
SHANDONG AIREP ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to solve the problems existing in the prior art, to provide a rare earth-based composite multi-component catalyst for denitrification and dedioxin removal and its preparation method, which has simple process, safe operation and denitrification, dedioxin and denitrification. The preparation method of the rare earth-based composite multi-component denitrification and dedioxin catalyst with multiple functions of mercury can solve the problem of dioxin pollution, greatly improve the activity of the catalyst, and broaden the temperature range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] The preparation method of the rare earth-based composite multi-component denitrification and dioxin removal catalyst comprises the following steps:

[0086] (1) Preparation of active components:

[0087] Add 50 liters of water into the active dissolving tank; then add 13kg of monoethanolamine into the dissolving tank, when the temperature reaches 90°C, add 12kg of ammonium metavanadate and 40kg of ammonium metatungstate into the dissolving tank , stirred evenly for 40 minutes, until all dissolved to obtain ammonium metavanadate, ammonium metatungstate active solution;

[0088] Add 50 liters of water into the active dissolving tank, then add 20kg of citric acid into the dissolving tank, stir for 5 minutes, add 10kg of cerium nitrate into the dissolving tank, and then add 10kg of lanthanum nitrate into the dissolving tank In the dissolving tank, cerium nitrate and lanthanum nitrate active solution are obtained after being completely dissolved;

[0089] (2) Preparation o...

Embodiment 2

[0106] The preparation method of the rare earth-based composite multi-component denitrification and dioxin removal catalyst comprises the following steps:

[0107] (1) Preparation of active components:

[0108] Add 30 liters of water into the active dissolving tank; then 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 ammonium metatungstate into the dissolving tank , stirred evenly for 30 minutes, until all dissolved to obtain ammonium metavanadate, ammonium metatungstate active solution;

[0109] Add 40 liters of water into the active dissolving tank, then add 15kg of citric acid into the dissolving tank, stir for 4 minutes, add 8kg of cerium nitrate into the dissolving tank, and then add 8kg of lanthanum nitrate into the dissolving tank In the dissolving tank, cerium nitrate and lanthanum nitrate active solution are obtained after being completely dissolved;

[0110] (2) Preparat...

Embodiment 3

[0127] The preparation method of the rare earth-based composite multi-component denitrification and dioxin removal catalyst comprises the following steps:

[0128] (1) Preparation of active components:

[0129] Add 60 liters of water into the active dissolving tank; then add 15 kg of monoethanolamine into the dissolving tank, and when the temperature reaches 95°C, add 15 kg of ammonium metavanadate and 45 kg of ammonium metatungstate into the dissolving tank , stirred evenly for 50 minutes, until all dissolved to obtain ammonium metavanadate, ammonium metatungstate active solution;

[0130] Add 50 liters of water into the active dissolving tank, then add 25kg of citric acid into the dissolving tank, stir for 6 minutes, add 12kg of cerium nitrate into the dissolving tank and wait until completely dissolved, then add 12kg of lanthanum nitrate In the dissolving tank, cerium nitrate and lanthanum nitrate active solution are obtained after being completely dissolved;

[0131] (2)...

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Abstract

The invention relates to a rare-earth-based composite multi-component denitration and dioxin-removing catalyst and a preparation method thereof. The rare-earth-based composite multi-component denitration and dioxin-removing catalyst takes titanium dioxide and silicon powder as carriers, and takes tungsten compounds, vanadium compounds, cerium compounds and lanthanum compounds as active components; and under the accompanying of auxiliary materials, all the raw materials are mixed, granulated, kneaded, molded, dried and roasted to prepare the catalyst, wherein the auxiliary materials comprise monoethanolamine, ammonia water, lactic acid, stearic acid, glass fibers, citric acid, PP (Propene Polymer) fibers, cellulose ether, polyoxyethylene and water. The preparation method of the rare-earth-based composite multi-component denitration and dioxin-removing catalyst has a simple process and is safe to operate, and the catalyst has a plurality of functions of denitration, dioxin removal and mercury removal; by adopting a catalytic decomposition technology, the dioxin pollution problem is solved; compared with that of active carbon, the adsorption is relatively complete; and the activity of the catalyst is extremely improved and the temperature use range is expanded.

Description

technical field [0001] The invention relates to a catalyst, in particular to a rare earth-based composite multi-component catalyst for denitration and dedioxin removal and a preparation method thereof. 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 Draft for Solicitation of Comments), it is necessary to achieve 100mg / Nm for new units or old units in key areas 3 SCR denitrification catalyst must be installed in the discharge requirements, and non-key areas meet 200mg / Nm 3 emission requirements. At present, the most mature denitrification technology in the world is SCR denitrification technology. SCR denitrification technology refers to the use of ammonia gas as a reducing agent under the action o...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01D53/86B01D53/56B01D53/70
Inventor 荣卫龙巩晓任学美边波
Owner SHANDONG AIREP ENVIRONMENTAL TECH CO LTD
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