【摘要】 在污泥中添加醋酸钙或碳酸钙后进行热解,探究不同钙盐对污泥中低温热解过程含氮物质转化的影响。对150～550℃热解后气、液、固三态产物分析,确定了污泥中主要含氮物质为蛋白质,受热分解为胺类、杂环氮和腈类,然后继续分解产生大量NH3和HCN。污泥中添加钙盐,将抑制蛋白质分解,并促进腈类物质在固体产物中的生成和残留,减少焦油中含氮物质的产生。醋酸钙通过产生丙酮捕捉NH3,能减少近50%的NH3释放,而碳酸钙无明显影响。更多还原

【Abstract】 The effect of different calcium salts on nitrogen transformation were investigated under low temperature pyrolysis,by adding calcium acetate or calcium carbonate in sewage sludge.The gas,tar and char collected from pyrolysis at 150～550℃ were analyzed.It is determined that the main nitrogen compounds in sludge was protein,and it would transformed into amine,heterocyclic nitrogen and nitriles, then continue to decomposed to produce a large amount of NH3 and HCN.Calcium salt added in sludge would inhibit protein decomposition and promote nitrile species formation and residue in solid products.Thus reduce nitrogen compounds content in tar.Calcium acetate can generate acetone to seize NH3 and reduce s～50%NH3 release,while calcium carbonate has no obvious effect.更多还原