Evaluation Research On Multi-targets Optimization Operation In Municipal Solid Wastage Boiler

With the high-speed development of economy,the rapid improvement of civil life and the incessant speedup of city course, the total yield of municipal solid wastage(MSW) per year is rapidly increased. There are four main ways to dispose MSW, that is sanitary fill,MSW compost,MSW combustion and synthetically use, the disposal technology of municipal solid waste combustion has been applied in large or middle size city, because it has the unique advantage of reducing capacity,being harmless to healthy and utilizing resource.Because MSW has the characteristic of lower heat value,superior water,complicated component, lower combustion stability,lower operation economy in MSW boiler and superior letting concentration of contamination brought by MSW combustion had happened in the process of electricity generated by MSW combustion. To solve these problem commendably, combustion stability,operation economy and environment in MSW boiler in the process of MSW combustion need to be evaluated and diagnosed in good time, optimization-strategy will be instituted on the basic of evaluation results in order to guide MSW boiler to realize optimization operation. So, evaluation on multi-target optimization operation in MSW boiler provides important theory gist for optimization operation in MSW boiler. This work aims at MSW combustion mechanism,the mechanism of forming contamination and evaluation on multi-target optimization operation in MSW boiler according to theory analysis. The following investigations were made in this dissertation.The essential theory of MSW combustion technology were introduced in detail, the process of MSW combustion,the primary factor of affecting MSW combustion and the mechanism of forming contamination including HCl,NOx,SO2,dioxin from MSW combustion flue gas were analyzed.Took some MSW boiler for studying object, when the heat value of MSW changed, this MSW boiler was carried through heat transfer checking computation and heat efficiency computation in different gross of air by utilizing the method of checking thermal calculation, different gross of air which can affect the heat efficiency of MSW boiler were researched.According to a large amount of historical data in MSW boiler performing, assessing index which can reflect the stability of combustion,the economy and environment of performance in MSW boiler and integrated index were tried out, the stability of combustion,the economy and environment of performance in MSW boiler and integrated target were evaluated by utilizing the method of principal component analysis(PCA).Finally, the primary research works were summed up, the prospects and advice for the further studies on existing research works were put forward.