A kind of flue gas sncr denitrification agent and preparation method thereof

A denitration agent and flue gas technology, applied in the field of flue gas SNCR denitrification agent and its preparation, can solve the problems of unstable temperature range of high temperature flue gas, increase of pollutants, poor effect of denitrification agent, etc., and achieve corrosion resistance of reaction equipment Small size, reduced reaction temperature, and good application prospects

Active Publication Date: 2022-07-12
南通润启环保服务有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the temperature range of high-temperature flue gas is unstable, and the reaction temperature of the denitrification agent is relatively narrow. Therefore, when the temperature is lower or higher than the corresponding reaction temperature range, the effect of the denitrification agent is not good, either resulting in poor reduction effect, or directly Excessive oxidation of the denitrification agent increases the generation of pollutants
[0004] In the prior art, the effective reaction temperature range is extended by adding synergists or other auxiliary agents, but these synergists and auxiliary agents will more or less produce some non-removable or difficult-to-emission pollutants after the reaction. These products will eventually be attached to the reactor or directly discharged with the tail gas, and are likely to generate other hazardous wastes, which will reduce the service life of the equipment and increase maintenance costs, which is not conducive to environmental protection

Method used

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  • A kind of flue gas sncr denitrification agent and preparation method thereof
  • A kind of flue gas sncr denitrification agent and preparation method thereof
  • A kind of flue gas sncr denitrification agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of denitrification agent:

[0025] Weigh 1 part of nano-titanium powder with particle size of 10-100nm, 100 parts of activated carbon and 8000 parts of urea, place the nano-titanium powder in an airtight container, fill the airtight container with hydrogen, and let stand for 10 minutes to obtain a hydrogenated storage tank. hydrogen metal;

[0026] The hydrogen storage metal and activated carbon powder after hydrogenation are mixed and stirred in a mixer, the stirring speed is 50r / min, and the first mixture is obtained by stirring for 5 minutes, and then the first mixture and urea are put into the mixer for mixing and stirring, and the stirring speed is 100r / min, stirring for 10min to obtain flue gas SNCR denitration agent.

Embodiment 2

[0028] Preparation of denitrification agent:

[0029] Weigh 20 parts of nano-magnesium powder with a particle size of 10-100nm, 500 parts of activated carbon and 9,500 parts of ammonium carbonate, place the nano-magnesium powder in an airtight container, fill the airtight container with hydrogen, and let stand for 30min to obtain a hydrogenated hydrogen storage metal;

[0030] The hydrogen storage metal and activated carbon powder after hydrogenation are mixed and stirred in a mixer, and the stirring speed is 100 r / min, and the first mixture is obtained by stirring for 10 minutes, and then the first mixture and ammonium carbonate are put into the mixer for mixing and stirring, and the stirring speed is 200r / min, stirring for 20min to obtain flue gas SNCR denitration agent.

Embodiment 3

[0032] Preparation of denitrification agent:

[0033] Weigh 10 parts of nano-zirconium powder with a particle size of 10-100nm, 200 parts of activated carbon, 4,500 parts of urea and 4,500 parts of ammonium bicarbonate, place the nano-zirconium powder in an airtight container, fill the airtight container with hydrogen, and keep the airtight container. The internal pressure was 100 atm, and it was allowed to stand for 10 minutes to obtain the hydrogen storage metal after hydrogenation;

[0034] The hydrogen storage metal after hydrogenation and the activated carbon powder are mixed and stirred in a mixer, the stirring speed is 80r / min, and the first mixture is obtained by stirring for 80min, and then the first mixture, urea and ammonium bicarbonate are put into the mixer for mixing and stirring, The stirring speed was 150 r / min, and the stirring was carried out for 15 min to obtain the flue gas SNCR denitration agent.

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Abstract

The present invention provides a flue gas SNCR denitrification agent and a preparation method thereof, which, calculated in parts by mass, include 80-95 parts of a reducing agent, 1-5 parts of activated carbon and 0.01-0.2 parts of a hydrogen storage metal, and the hydrogen storage metal is Pre-hydrogenation treatment, the preparation method includes: mixing hydrogen storage metal with activated carbon and then mixing with reducing agent, thereby obtaining flue gas SNCR denitration agent. The flue gas SNCR denitrification agent of the invention has a wider effective reaction temperature range, and at the same time produces less solid particles after the reaction, has stronger reducing ability to nitrogen oxides, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to the technical field of waste gas treatment, and in particular to a flue gas SNCR denitration agent and a preparation method thereof. Background technique [0002] In the existing industrial production, the emission of high-temperature flue gas is basically accompanied by the emission of various nitrogen oxides. Nitrogen oxides are harmful to the human body and cause acid rain. In order to alleviate the pressure on the environment, the state's emission requirements for nitrogen oxides More and more strict, the current control methods for nitrogen oxides mainly include two, one is selective catalytic conversion (SCR), the other is selective non-catalytic reduction (SNCR), the reaction conditions of the former are compared Mild, the nitrogen oxides in the flue gas are reacted with the reducing agent under the catalytic action of the catalyst to produce harmless nitr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/56B01D53/81
CPCB01D53/565B01D53/81B01D2251/206Y02E60/32
Inventor 王路路吴阳杨邱雪峰周长宏王臣汤凯邹友国
Owner 南通润启环保服务有限公司
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