Life Cycle Assessment Of The High Parameter Rubbish Incineration Power System

Municipal solid wastes have been an indispensable restrict point in the urbandevelopment, how to dispose solid waste with economy and environmental protectionhas become research hotspot in many scholars and environmentalist. Life cycleassessment as an environmental management tool can be applied to the evaluation ofmunicipal solid wastes.According to the characteristics of Changzhou municipal solid wastes, this papercompared high parameter rubbish incineration power system and middle parameterrubbish incineration power system and sanitary landfill. First the different grounds ofincineration boiler and waste heat boiler and boiler anticorrosion technology of highparameter rubbish incineration power system and middle parameter rubbish incinerationpower system were compared. Secondly the life cycle model of high parameter rubbishincineration power system and middle parameter rubbish incineration power system andsanitary landfill were constructed. Finally the environmental impact potential of globalwarming and acidification and eutrophication and photochemical ozone creationpotentials and ecological toxicity of three garbage disposal scheme were analyzed. Themain contents and results are followed:(1) Through compared the incineration boiler and waste heat boiler of highparameter rubbish incineration power system and middle parameter rubbish incinerationpower system that the heating reducing ratio of high parameter rubbish incineration isless than the heating reducing ratio of middle parameter rubbish incineration and pipematerial and pipe wall thickness of two kinds of parameter are difference. The heatabsorption accounted of water wall radiation in heated surface of high parameterincreased21.9%and the heat absorption accounted of economizer decreased17.3%compared middle parameter. The tube bundle of flow path and evaporator pathincreased20mm and the transversal pitch of superheater path of high parameterincreased35mm compared middle parameter.(2) The landfill leachate deposing of high parameter rubbish incineration powersystem was incinerated through back to furnace when life cycle model was constructed,but back to furnace can influerce generated energy. Through calculation, the generated energy of burning1t solid wastes in high parameter and middle parameter were304.83kwh and278.82kwh.(3) The environmental impact potential of global warming and acidification andeutrophication and photochemical ozone creation potentials and ecological toxicity ofthree garbage disposal scheme and different stages of high parameter were calculatedthrough characterized and standardized and weighted processing. By comparison, theenvironmental impact potential of global warming and photochemical ozone creationpotentials with sanitary landfill were more than other two kinds scheme and theenvironmental impact potential of acidification and eutrophication and ecologicaltoxicity with middle parameter were more than other two kinds scheme. The burning isthe main stage that Harm to the environment in the high parameter rubbish incinerationpower system.(4) Using “SNCR+semi-dry+dry+activated carbon adsorption+cloth bag dusting”flue gas purification system and landfill leachate back to furnace can reduceenvironmental impact potential of acidification and eutrophication compared withmiddle parameter. High parameter rubbish incineration power system has lowenvironmental load compared with middle parameter rubbish incineration power systemand sanitary landfill for Changzhou.