杂质对废塑料裂解产物及污染物排放的影响  

Influence of Impurities on Waste Plastics Pyrolysis: Products and Emissions

作　　者：赵磊[1,2] 王中慧[1] 陈德珍[1] 马晓波[1] 栾健[3] 

机构地区：[1]同济大学热能与环境工程研究所,上海200092 [2]南洋理工大学废弃物资源化中心,新加坡639798 [3]中国船舶重工集团第七一一研究所,上海201108

出　　处：《环境科学》2012年第1期329-336,共8页Environmental Science

基　　金：“十一五”国家科技支撑计划项目(2008BAC46B06)

摘　　要：从垃圾中分选出的废塑料混有大量杂质,杂质对现有废塑料裂解工艺有直接的影响.针对这一问题,对混有厨余、纸、织物和渣土等杂质的废塑料裂解产物和污染物排放进行了研究.同时检测和分析了厨余、纸、织物和沙土等常见杂质所含N、Cl、S元素向裂解油、裂解气中的迁移规律.研究表明,厨余的混入将对裂解油的产物产生严重不利影响,如热值降低至27 MJ/kg,油品的含水率高达25%以及多环芳烃含量大大提高,因而应在分选过程中除去.厨余、织物和纸张等杂质的混入导致裂解气体中污染物浓度的显著上升.渣土的混入对气体产物有有利影响,对油品无明显不利影响.The study is aimed to evaluate the impact of impurities like food waste, paper, textile and especially soil on the pyrolysis of waste plastics. For this purpose, emissions, gas and liquid products from pyrolysis of waste plastics and impurities were studied, as well as the transfer of element N, Cl, S from the substrates to the pyrolysis products. It was found that the presence of food waste would reduce the heat value of pyrolysis oil to 27 MJ/kg and increase the moisture in the liquid products, therefore the food residue should be removed from waste plastics; and the soil, enhance the waste plastics’ pyrolysis by improving the quality of gas and oil products. The presence of food residue, textile and paper leaded to higher gas emissions.

关 键 词：废塑料 裂解 产物 厨余 渣土 排放 

分 类 号：X705[环境科学与工程—环境工程]