Flue Gas Purification System Design And Numerical Simulation

In recent years, the air quality is declining with frequent phenomena of fog and haze.People's awareness of environmental protection continue to strengthen. Much attention has been paid to atmospheric pollution.The standard of atmospheric pollution is becoming more and more strict.The industrial flue gas emissions is the main source of pollution. Therefore,how to improve and enhance the existing pollution control technologies is imminent.Based on the domestic and foreign experts and scholars' research on the wet, semi dry desulfurization technology, bag type dust removal technology, SNCR and SCR denitration technology, a process system design scheme is put forward for the purification of SO2,NOx and dust in the flue gas.The scheme is composed of two modules.They are respectively the module of “the spray drying method + bag-filtering dust precipitator+wet scrubbing "which can be able to achieve desulfurization and dust removal and the module of “SNCR and SCR joint denitration method” which can achieve the function of denitration.The two sub-moudles are respectively made up by two or three kinds of technologies.The application of practical engineering solutions can be split selected as required.The mathematical model of the two modules process system is set up.Using the Visual Basic programming design software for programming mathematical model, a design software for desulfurization and dust removal and denitration can be written.When initial parameters change during the operation of the software,the variation between the design parameters can provide reference for determining the optimum technological process.Based on the simplified analysis of desulfurization process of desulfurization tower, the process model of the single tower system was established by using the chemical process simulation software Plus Aspen. Analysis of each node of the material flow and group, and operating parameters on the desulfurization process, the smoke gas, flue gas at the inlet SO2 concentration, calcium sulfur ratio, liquid gas ratio of sensitivity analysis, to study the influence on the desulfurization efficiency and to the system design and operation optimization for reference.