Preparation method of flue gas denitration agent

A technology for denitrification and flue gas, which is applied in the field of preparation of flue gas denitration agents, can solve problems such as low denitration efficiency, and achieve the effects of improving denitration efficiency, increasing specific surface area, and improving activity

Inactive Publication Date: 2018-12-07
刘凡领
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for preparing a flue gas denitrification agent in view of the low denitrification efficiency of the currently commonly used flue gas denitrification agents

Method used

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Effect test

preparation example Construction

[0030] A preparation method of a flue gas denitrification agent, comprising the steps of:

[0031] (1) Take limestone in a pulverizer, crush it through an 80-mesh sieve, take the sieved particles according to the mass ratio of 3:0.2~0.5:12~20, add adjuvants and water to the container and mix, and stir at 350~500r / min for 20~35min Finally, move it into -4℃ refrigerator for 20~24 hours to get the refrigerated material, take the refrigerated material and add ball milling medium 2~4 times the mass of the refrigerated material to mix, move to the ball mill tank, add zirconia ball mill according to the ratio of ball to material 20~30:1 Beads are ball milled at 350~500r / min for 20~35min to obtain the ball mill. Take the ball mill and add solvent A which is 3~5 times the mass of the ball mill. Refrigerate at -4°C for 8~12h, then transfer to -60~-80°C vacuum dryer for 20~24h to freeze and dry in vacuum to obtain pretreated stones for later use;

[0032] (2) According to parts by weigh...

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Abstract

The invention discloses a preparation method of a flue gas denitration agent and belongs to the technical field of flue gas treatment. According to the preparation method, limestone powder is used asa raw material, and the limestone and an auxiliary agent are subjected to operations of refrigeration, ball milling, microwave treatment, freezing and drying and the like, and diffusion of nitrogen oxide to a reaction interface in a denitration process can be effectively improved, so that the denitration efficiency is improved. According to the preparation method, steel dreg is activated by adopting ball milling treatment, the size of steel dreg grains are reduced, and physicochemical properties of a crystal structure and a surface are changed, so that the specific surface area of the steel dreg is enlarged, inner energy and surface energy are increased and crystal lattices can be reduced; crystal lattice dislocation and defects are generated, and an amorphous-state structure which is soluble in water is formed on the surface of the steel dreg; the size of the crystal lattices is reduced and the contact area with the water is enlarged, and the activity can be improved; active substances which can participate in hydration in a system can be sufficiently exposed, so that the activity of the steel dreg is improved; and a concentration and fermentation material component is used to improve the denitration effect very well. By adopting the preparation method, the problem that the denitration efficiency of a current common flue gas denitration agent is low is solved.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to a preparation method of a flue gas denitration agent. Background technique [0002] Flue gas denitrification is the process of removing nitrogen oxides from combustion flue gas. The principle of flue gas denitrification is mainly to oxidize NO into NO with 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. Due to the NO in the flue gas emitted from the combustion system x , more than 90% is NO, and NO is insoluble in water, so the NO x The wet treatment cannot use 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 Applications(China)
IPC IPC(8): B01D53/56B01D53/86B01D53/58B01D53/54B01D53/50B01D53/62B01D53/84
CPCB01D53/56B01D53/84B01D53/86B01D53/8609B01D53/8621B01D53/8628B01D53/8634B01D53/8637B01D53/864B01D53/8643B01D53/88B01D2251/404B01D2251/602B01D2258/0283Y02A50/20
Inventor 刘凡领陈建春付平
Owner 刘凡领
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