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

A technology of denitration agent and flue gas, which is applied in the field of flue gas denitrification agent, can solve the problems of high preparation cost of denitrification agent and unstable denitrification performance, achieve good economic benefits, enhance product market competitiveness, and improve denitrification efficiency

Active Publication Date: 2021-01-15
MCC BAOSTEEL TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a flue gas denitrification agent and its preparation method and use, which are used to solve the problems of high preparation cost and unstable denitrification performance in the prior art.

Method used

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

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Effect test

Embodiment 1

[0037] The formula of flue gas denitrification agent in the present embodiment is as follows by weight percentage:

[0038] Steel slag fine powder 15.0%

[0039] Alkali-activated activated carbon 85.0%

[0040] Steel slag micropowder adopts converter hot slag, its particle size is 5.48μm~104.30μm, and its chemical composition and mass percentage are SiO 2 11.06%, Fe 2 o 3 24.40%, Al 2 o 3 2.30%, CaO 46.78%, MgO 5.75%, P 2 o 5 0.91%, MnO 2.19%, SO 3 0.23% and other 6.38%.

[0041] First, the activated carbon is mixed with 60w% sodium hydroxide solution, so that the activated carbon is completely immersed in the sodium hydroxide solution; the above mixture is placed in a vacuum oven with a vacuum degree of -0.06MPa and a temperature of 60°C for 30 minutes to obtain activated carbon. Adsorb alkaline solution. Secondly, put the activated carbon-adsorbed alkali solution into a microwave oven for heating, wherein the microwave power is 400W, and the activation time is...

Embodiment 2

[0044] In this embodiment, the flue gas denitration agent is formulated as follows according to the weight percentage of raw material components:

[0045] Steel slag powder 30.0%

[0046] Alkali-activated activated carbon 70.0%

[0047] The steel slag micropowder adopts casting slag, its particle size is 5.04μm~105.30μm, and its chemical composition and mass percentage are SiO 2 14.75%, Fe 2 o 3 12.92%, Al 2 o 3 10.97%, CaO 46.93%, MgO 3.06%, P 2 o 5 0.50%, MnO1.67%, SO 3 1.26% and other 7.94%.

[0048] First, the activated carbon is mixed with 70w% sodium hydroxide solution, so that the activated carbon is completely immersed in the sodium hydroxide solution; the above mixture is placed in a vacuum drying oven with a vacuum degree of -0.09MPa and a temperature of 90°C for 60min to obtain activated carbon adsorption. alkaline solution. Secondly, put the activated carbon-adsorbed alkali solution into a microwave oven for heating, wherein the microwave power is 800...

Embodiment 3

[0052] The raw material components and weight percentage formula of the flue gas denitrification agent in the present embodiment are as follows:

[0053] Steel slag powder 20.0%

[0054] Alkali-activated activated carbon 80.0%

[0055] Steel slag powder adopts converter drum slag, its particle size is 2.68μm~92.14μm, and its chemical composition and mass percentage are SiO 2 12.31%, Fe 2 o 3 25.08%, Al 2 o 3 1.56%, CaO 47.00%, MgO 5.61%, P 2 o 5 0.99%, MnO1.80%, SO 3 0.13% and other 5.52%.

[0056] First, activated carbon is mixed with 80w% sodium hydroxide solution, so that the activated carbon is completely immersed in the sodium hydroxide solution; the above mixture is placed in a vacuum oven with a vacuum degree of -0.07MPa and a temperature of 80°C for 40 minutes to obtain activated carbon. Adsorb alkaline solution. Secondly, put the activated carbon-adsorbed alkali solution into a microwave oven for heating, wherein the microwave power is 700W, and the acti...

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Abstract

The invention provides a flue gas denitration agent. Based on the total weight of raw material components of the flue gas denitration agent, the flue gas denitration agent comprises the following rawmaterial components in percentage by mass: 15-30% of steel slag micro powder and 70-85% of alkali-excited activated carbon, wherein the alkali-excited activated carbon is prepared by soaking activatedcarbon in an alkali solution, then carrying out microwave treatment, carrying out washing with an acid solution, carrying out washing with water to neutral, and carrying out drying. According to theinvention, metal oxide in the steel slag micro powder is used as a catalyst, and C and CO in the activated carbon are used as reducing agents, so that the denitration efficiency is obviously improved,the denitration efficiency is further improved by a weak alkali environment, the cost is reduced, and the novel flue gas denitration agent is developed.

Description

technical field [0001] The invention relates to a flue gas denitrification agent, in particular to a flue gas denitrification agent modified by steel slag micropowder. Background technique [0002] Flue gas denitrification is the process of removing nitrogen oxides from combustion flue gas. The principle of flue gas denitrification is to oxidize NO to NO with an oxidant 2 , the generated NO 2 Then absorb it with water or alkaline solution to achieve denitrification. Mainly include: acid absorption method, selective catalytic reduction method, non-selective catalytic reduction method, adsorption method, plasma activation method, etc. Since more than 90% of the NOx in the flue gas discharged from the combustion system is NO, and NO is difficult to dissolve in water, so the wet treatment of NOx cannot use a simple washing method. HNO 3 The liquid needs to be concentrated, and O 3 High voltage production is required, and the initial investment and operating costs are high....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/56
CPCB01D53/8625B01D2258/0283
Inventor 陈伟张亮海吴守仓刘旭
Owner MCC BAOSTEEL TECH SERVICE