火化机污染物排放特点及减排技术探讨

Discussion on emission characteristics and reduction technology of pollutants from cremators

为了进一步降低火化炉尾气污染物排放浓度,分析了火化机污染物排放特点,通过试验研究了火化时长对污染物排放浓度的影响。结果表明:火化炉燃烧过程的影响因素较多,参数波动大且炉内燃烧稳定性差,由此导致尾气排放污染物浓度波动较大;对于常规的净化工艺,通过延长焚烧时间和优化炉膛燃烧条件,粉尘、SO_(2)、HCl、Hg、黑度、二噁英可以达到《火葬场大气污染物排放标准》(GB 13801—2015)要求;当火化时长达到45 min以上,尾气污染物排放得到较好控制,SO_(2)、NO_(X)、CO含量可分别降至8、140、71 mg/m^(3)。

In order to further reduce the pollutant concentration of exhaust gas from cremators,the emission characteristics of pollutants were analyzed,and the effect of cremation duration on the concentrations of pollutants was studied through experiments.The results show that the combustion process in the cremator was affected by many factors.The parameters fluctuate greatly and the combustion stability is poor.Thus the pollutant concentration of exhaust gas fluctuates greatly.For the conventional purification process,the concentrations of dust,SO_(2),HCl,Hg,blackness and dioxin can meet the requirements of the emission standard of air pollutants for crematory(GB 13801—2015)by extending the incineration time and optimizing combustion conditions of the cremator.When the cremation duration was more than 45 min,the pollutant concentration of exhaust gas are well controlled,and the concentrations of SO_(2),NO_(X)and CO are reduced to 8,140,and 71 mg/m^(3).