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Inactivated vanadium-titanium-based honeycomb-like denitration catalyst combined denitration-demercuration modifying regeneration liquid and preparation method thereof

A denitration catalyst and a vanadium-titanium-based technology are applied in the field of deactivated vanadium-titanium-based honeycomb-shaped denitration catalyst combined with denitration and mercury modified regeneration solution and its preparation field to achieve the effect of good zero-valent mercury oxidation ability

Inactive Publication Date: 2015-08-05
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no patent has been found so far in the regeneration process of the deactivated denitrification catalyst, so that the catalyst can restore the denitrification activity and at the same time enable the catalyst to have the ability to remove mercury

Method used

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  • Inactivated vanadium-titanium-based honeycomb-like denitration catalyst combined denitration-demercuration modifying regeneration liquid and preparation method thereof
  • Inactivated vanadium-titanium-based honeycomb-like denitration catalyst combined denitration-demercuration modifying regeneration liquid and preparation method thereof
  • Inactivated vanadium-titanium-based honeycomb-like denitration catalyst combined denitration-demercuration modifying regeneration liquid and preparation method thereof

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Effect test

Embodiment 1

[0030] In this embodiment, a deactivated vanadium-titanium-based honeycomb denitrification catalyst combined with denitrification and demercuration modified regeneration solution is composed of 25wt% active recovery solution, 25wt% mercury removal modification solution and the balance of deionized water. Wherein the activity recovery solution is composed of 0.2wt% ammonium metavanadate, 1wt% ammonium metatungstate, 1.2wt% oxalic acid and the rest deionized water. The mercury removal modification solution is composed of 4wt% cerium nitrate, 0.5wt% copper chloride and the rest deionized water.

[0031] The preparation process of the deactivated vanadium-titanium-based honeycomb denitration catalyst combined with denitration and demercuration modified regeneration solution is as follows:

[0032] 1. Preparation of active recovery solution: weigh 0.2wt% ammonium metavanadate, 1wt% ammonium metatungstate, and 1.2wt% oxalic acid in proportion, dissolve them in the remaining deionize...

Embodiment 2

[0048] In this embodiment, a deactivated vanadium-titanium-based honeycomb denitrification catalyst combined with denitrification and demercuration modified regeneration solution is composed of 35wt% active recovery solution, 25wt% mercury removal modification solution and the rest of deionized water. Wherein the activity recovery solution is composed of 0.2wt% ammonium metavanadate, 1wt% ammonium metatungstate, 1.2wt% oxalic acid and the rest deionized water. The mercury removal modification solution is composed of 4wt% cerium nitrate, 0.5wt% copper chloride and the rest deionized water.

[0049] The preparation process of the deactivated vanadium-titanium-based honeycomb denitration catalyst combined with denitration and demercuration modified regeneration solution is as follows:

[0050] 1. Preparation of active recovery solution: weigh 0.2wt% ammonium metavanadate, 1wt% ammonium metatungstate, and 1.2wt% oxalic acid in proportion, dissolve them in the remaining deionized w...

Embodiment 3

[0058] In this embodiment, a deactivated vanadium-titanium-based honeycomb denitrification catalyst combined with denitrification and demercuration modified regeneration solution is composed of 40wt% active recovery solution, 40wt% mercury removal modification solution and the balance of deionized water. The activity recovery solution is composed of 0.25wt% ammonium metavanadate, 1.25wt% ammonium metatungstate, 1.2wt% oxalic acid and the rest deionized water. The mercury removal modification liquid is composed of 5wt% cerium nitrate, 1.25wt% copper chloride and the rest deionized water.

[0059] The preparation process of the deactivated vanadium-titanium-based honeycomb denitration catalyst combined with denitration and demercuration modified regeneration solution is as follows:

[0060] 1. Preparation of active recovery solution: weigh 0.25wt% ammonium metavanadate, 1.25wt% ammonium metatungstate, and 1.2wt% oxalic acid in proportion, dissolve them in the remaining amount of...

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Abstract

The invention discloses an inactivated vanadium-titanium-based honeycomb-like denitration catalyst combined denitration-demercuration modifying regeneration liquid and a preparation method thereof. The modifying regeneration liquid is composed of an activity recovery liquid, a demercuration modifying liquid and deionized water. The activity recovery liquid is composed of ammonium metavanadate, ammonium metatungstate, oxalic acid and deionized water, and the demercuration modifying liquid is composed of cerium nitrate, copper chloride and deionized water. The activity recovery liquid is uniformly mixed with demercuration modifying liquid according to proportion to obtain the combined denitration-demercuration modifying regeneration liquid. The modifying regeneration liquid, when being used for regenerating an inactivated vanadium-titanium honeycomb-like denitration catalyst, can recover the denitration activity and meanwhile achieve the capability of combined oxidization demercuration. The catalyst is higher than 90% in denitration efficiency and higher than 85% in demercuration efficiency at 350 DEG C. The modifying regeneration liquid will not increase cost due to demercuration after flue gas denitration, is economical and environment-friendly and is suitable for industrial popularization.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a deactivated vanadium-titanium-based honeycomb denitration catalyst combined with denitrification and demercuration modified regeneration solution and a preparation method thereof. Background technique [0002] my country's energy consumption is dominated by coal, and electricity production mainly comes from the direct combustion of coal in thermal power plants. Pollutants emitted by thermal power plants include respirable solid particles, carbon dioxide, sulfur dioxide, and nitrogen oxides (NO x )Wait. Nitrogen oxides, as one of the main air pollutants, have attracted widespread attention because they can cause acid rain, light pollution, global warming, and reduce the ozone layer. With the development of the economy, the demand for environmental protection is increasing day by day. my country has continuously strengthened the emission concentration limi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/92B01D53/96B01D53/56B01D53/64B01D53/86
Inventor 闫巍王磊周扬郜时旺许世森冯向程
Owner HUANENG CLEAN ENERGY RES INST