Research On System Optimization Of The Flue Gas In Waste Incineration Power Plant

With the deepening of reform and opening up and speeding up the process ofurbanization, increasing pollution garbage in the way the current waste disposal, wasteincineration volume reduction due to the large, high energy efficiency, and graduallybecome the mainstream treatment of urban waste. However, waste incineration willproduce secondary pollutants, especially waste incineration flue gas impact on theenvironment more and more attention, so waste incineration flue gas treatment is thekey to healthy development.Since waste incineration flue gas containing including dioxins, SO2, HCl, HF andother acidic gases, causing a serious impact on the environment and humans, the worldis currently in strictly controlled flue gas emission targets, but also the development of avariety of flue gas treatment new technologies, including the use of existing technologyportfolio. This paper analyzes the current mainstream of waste incineration flue gastreatment processes in order to achieve the EU2000emissions standards, combinedwith flue gas treatment process of waste incineration plants already in operation, mademore feasible, taking into account the cost of investment and operating costs offlue gas treatment new technology to meet the requirements mentioned standard smoke.In this paper, Changzhou municipal solid waste characteristics, combined withEverbright Changzhou flue gas treatment system, through the existing flue gas emissiontargets with the EU2000emissions standards were compared and found transformationmainly nitrogen oxides and acid gas emissions control; while the current mainstreamtechnology for flue gas treatment is "semi-dry+activated carbon injection+baghouse",on this basis, the increase SNCR denitrification deacidification process and dry process,you can reach the EU2000standard.For transformation of Changzhou mentioned standard flue gas treatment process,using the SNCR denitrification process, analyzes the difference between reducingammonia and urea, ammonia as nitrogen and reducing the final selection; engineeredand optimization of operating parameters, the analysis of the factors affecting theefficiency of nitrogen, select denitration temperature range at900-950℃, reductantinjection point selection in the vicinity of the first flue fold flame angle, injectorsarranged in three layers, a total of nine holes each furnace; NH3/NO molar ratio of1.0to2.0in the general control, to meet the requirements of the European standard2000is less than200NOX.Deacidification process adds dry deacidification process, forming a"semi-dry+dry" the combined process, analyzes the factors that influence theefficiency of removal of acid, calcium acid molar ratio absorber exit gas temperature,lime plasma concentration, atomizer speed were optimized to achieve the requirementsof the EU2000standard acid gas emissions.