废聚苯乙烯塑料共焦化过程的生命周期评价

随着我国废塑料资源化利用技术的不断发展,其资源化过程中的环境问题也日益显现。以生命周期评价为研究方法,对废聚苯乙烯共焦化过程的环境影响进行评价。研究结果表明:废聚苯乙烯共焦化过程对酸化、烟尘和粉尘、全球变暖3类环境问题的影响较大,分别占了总影响的34.0%、27.5%和23.3%。从共焦化过程的3个阶段来看,入炉炼焦阶段的环境影响最大,其次是混合颗粒制备阶段和PS颗粒制备阶段,对炼焦阶段环境污染的控制是废塑料共焦化技术发展的关键。

LIFE CYCLE ASSESSMENT ON CO-COKING WITH WASTE POLYSTYRENE PLASTIC

With the development of technologies for utilizing waste plastic,its environmental problems become more serious than ever.With the method of life cycle assessment,this article is aimed to evaluate the environmental loads generated from the co-coking process with waste polystyrene.Results show that the most severe environmental loads are acidification,global warming and dust,which account respectively for 34.0%,27.5% and 23.3% of the total environmental load.In the three stages of co-coking process,the coking stage has the largest percent of environmental load,then the mix stage and the fragmentation stage.For a better environmental performance of this process,it is crucial to reduce the environmental load of the coking stage.