The Life Cycle Assessment Of Waste Incineration Power Generation

As the development of the urban economic and population, the amount of MSW is also increasing. Our country usually adopt the landfill, composting and incineration to deal with the MSW, in order to reduce the environmental impact of MSW. As the development of the incineration technology, incineration has been more and more used to deal with the MSW. Until 2014, we had built a total of 140 waste incineration power plants, and more than 400 waste incineration power plants had being built. Until 2010, the quantity of MSW in our country had been reach 180 million tons per day, and the quantity of MSW which is been burned reach the ten percent of the total. Incineration has the characteristics of reduction, harmless and recycling, so it is very important in todays' waste disposal.In this paper, we use the fuzzy comprehensive evaluation method to the life cycle assessment. We evaluated the common two garbage treatment technology. The results shows that by the increases of the economy right factors' weight, incineration gains more and more points: Landfill is better than incineration only when the economic factors weights less than 65 percent. When considering the technical and social factors, incineration is always better than the landfill. Incineration is more in line with China's national conditions.In this paper, we use the life cycle assessment to analyze the heavy metals in waste incineration power plants' production phase. And then we get the environmental impact potential data of the heavy metals in the incineration power plants' life cycle?m3S /?p?a??: Hg 8.314×10-7;Cd 6.943×10-6;Pb 3.511×10-6;Cu 3.317×10-6;Zn 3.190×10-5;Cr 1.780×10-6;Ni 8.560×10-6. It is good for waste incineration power plants' technological improvement in future.In this paper, we use the life cycle assessment and then get the data of the exergy and CO₂ emissions data in the incineration power plant's life cycle. The calculation results shows that: from the operation phase, full life cycle energy Input-output ratio of waste, the denitration process and the desulfurizing process is 2.214MWh/t, 228.549MWh/a and 43.257MWh/a. The CO₂ emissions of the translation process, the incineration process, the denitration process and the desulfurizing process is: 4771.44t/a, 155232.1t/a, 16517.71t/a, and 1734.655t/a...