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Preparation method of denitration and demercuration integrated catalyst powder

A catalyst and mercury removal technology, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve problems such as cracking and uneven dispersion of active substances, and achieve simple operation process, stable product quality, and environmental impact. small effect

Inactive Publication Date: 2017-02-15
HUANENG POWER INT INC +2
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Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of integrated denitrification and demercury catalyst powder, which can solve the problem of uneven dispersion of active substances in the carrier in the existing process, and can effectively avoid denitrification and demercury catalysts during production. Cracking problems caused by excessive shrinkage during the process

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] The specific implementation steps of a preparation method of a denitrification and demercury integrated catalyst powder are as follows:

[0029] 1) The TiO obtained in the process of preparing titanium dioxide by sulfuric acid 2 ·H 2 O (hydrated titanium dioxide, also known as metatitanic acid) filter cake and water are mixed and beaten in a stirring tank to make TiO 2 ·H 2 Titanium solution of O;

[0030]2) Add NH to the mixing tank 3 ·H 2 O, the pH of the slurry, NH 3 ·H 2 O and TiO 2 ·H 2 SO entrained in O filter cake 4 2- Ion reaction formation (NH 4 ) 2 SO 4 , so that the slurry has a certain viscosity; then add a suspending agent to the slurry to enhance the dispersion and stability of the slurry; add a certain amount of nano-CeO to the titanium solution 2 powder;

[0031] 3) Start the stirrer positioned at the to...

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Abstract

The invention discloses a preparation method of a denitration and demercuration integrated catalyst powder. The method includes: beating hydrated titanium dioxide and nano cerium oxide evenly in a stirring tank for slurrying, adding ammonia water and a suspending agent to adjust the slurry viscosity, then conducting horizontal mixing of an agitator and vertical circulation of a circulation pump to realize multi-dimensional mixing of hydrated titanium dioxide and nano cerium oxide so as to obtain a stable and uniform titanium cerium suspension solution, and then carrying out pressure filtration and calcinations to obtain titanium cerium powder. The method can realize uniform mixing of CeO2 in the carrier TiO2, and the vanadium tungsten titanium cerium denitration and demercuration integrated catalyst prepared from the titanium cerium powder has greatly improved yield and catalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of environmental protection of coal-fired boilers, and in particular relates to a method for preparing a denitrification and demercuration integrated catalyst powder. Background technique [0002] Mercury is a volatile global pollutant, which can diffuse globally through the atmosphere and water, spread through the food chain and accumulate in higher organisms. Mercury poisoning is persistent because mercury and its compounds cannot be broken down through metabolism. Coal combustion is considered to be one of the main sources of anthropogenic mercury emissions, and China is the world's largest coal consumer, and it is estimated that China contributes 25% to 40% of global mercury emissions each year. The air pollutant emission standard for coal-fired power plants (GB13223-2011), which is being implemented in my country, limits the mercury emissions of coal-fired power plants to 0.03mg / m 3 and below. With i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01D53/86B01D53/56B01D53/64
CPCB01D53/8631B01D53/8665B01D2255/2065B01D2255/20707B01J21/06
Inventor 吴国勋张强罗奖合李建玺王凯尹琢然郭利静
Owner HUANENG POWER INT INC
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