Preparation method of flue gas denitration agent

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....

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