通过工程的经济性分析、工艺过程的能流分析以及工程的环境影响分析,综合分析了流化床、炉排炉、气化熔融和等离子体气化等不同城市生活垃圾焚烧技术。结果表明:(1)在零补贴的情况下,流化床焚烧技术的工程效益最佳,但从项目投产年算起,其投资回收期也需9年;炉排炉、气化熔融与等离子体气化焚烧技术要达到流化床焚烧技术零补贴情况下的经济效益,分别需补贴约70、140、500元/t。(2)各城市生活垃圾焚烧技术下区域的水体富营养化和全球变暖影响最显著,而人体毒性影响最小。气化熔融焚烧技术和等离子体气化焚烧技术的环境影响比其他两种焚烧技术小一个数量级。(3)考虑污染物排放的环境效益,在现行中国排放标准下。流化床、炉排炉与气化熔融焚烧技术的工程效益都将得到较大提升。随着排放标准的更加严格,流化床焚烧技术的年收益率下降最显著;气化熔融焚烧技术的工程效益相较最优。
Considering different municipal solid waste (MSW) incineration technologies, economic, energy flow and environmental impact analysis for fluidized bed technology, grate furnace, gasification-melting technology and plasma gasification technology was carried out. The results showed that, in the absence of treatment subsidies, the project benefits of fluidized bed incineration technology was best ,but the payback period was also required to 9 years. To achieve the economic benefits of fluidized bed technology,the subsidies for grate furnace,gasification-melting technology and plasma gasification technology were 70,140,500 yuan/t, respectively. For each MSW incineration technology, the eutrophication and global warming impacts were most significantly,while the human toxic effect was relatively minimal, the environmental impact of gasification-melting technology and plasma gasification technology were far less than that of grate furnace and fluidized bed technology. If considering the pollutant emission reduction benefits, the benefits of fluidized bed incineration technology, grate furnace and gasification-melting technology project would be greatly improved in the current China emission standards, with the emission standards become stricter, the benefits of fluidized bed technology would decrease sharply,and the benefits of gasification and melting technology was best.