Research Of Flue Gas Treatment For Magnesia Calcined Oil Kiln

Magnesium mineral resource in China is very rich. Its reserves, production and export volume of magnesia refractories rank first in the world. Magnesia is an excellent raw material for manufacturing refractory.But a large number of pollutant gas is often generated in magnesia production process.This caused great harm for the environment and people’s lives. Therefore, with the magnesite calcining kiln increasing, pollution is more and more serious.So treating the flue gas that produced in the process of the burning of magnesium is a very important research topic.Magnesia calcined oil kiln calcining process is used to calcine magnesia.The fuel is heavy oil and the temperature is as high as above1800℃, this led to the content of NOx in flue gas is very high.So this paper studied and analyzed how to carry out flue gas denitrificationThe research topics direction of this paper is mainly using Selective Catalytic Reduction (SCR) to treat NOx of the magnesia calcined oil kiln flue gas. The purpose of the study is designing and optimizing the structure of the SCR reactor to achieve good efficiency of denitrification.This paper is concering the formation mechanism and harm of NOx of magnesia calcined oil kiln flue gas.And describes the development of NOx removal technology at home and abroad. Through analysis and comparison we determine Selective Catalytic Reduction (SCR) to conduct flue gas denitrification. This paper also describes in detail the principle, process and equipment of the Selective Catalytic Reduction (SCR).Basis on the actual parameters of flue gas and the specific situation of magnesia calcined oil kiln, this paper designed SCR reactor structure and built a mathematical model for the SCR reactor, model mesh is plotted by Gambit.Fluent simulation software is used for the reactor flow field’s numerical simulation. Through the comparison of simulation process from different different structures, status of reactor such as velocity distribution and pressure distribution are intuitively known.It can optimize the structure of the SCR reactor and provide a scientific basis for the simulation of concentration field. Finally,Chemkin simulation software is used for the reactor concentration field’s numerical simulation. It can provide an important basis on a reasonable arrangement for the SCR catalyst reactor to achieve the good efficiency of denitrification. Through simulation results,the affect on SCR reactor flow or concentration.can be obtained by the whole laying of the catalyst layer,the guiding plate and rectifier.