采用立式管式炉试验系统研究城市污水污泥与麦秆混烧过程中碱金属钾的转化特性,利用电感耦合等离子体发射光谱仪(ICP-OES)、X射线衍射仪(XRD)以及扫描电子显微镜(SEM)等检测手段,分析麦秆和城市污水污泥不同温度混烧灰的成分、晶相结构以及微观形貌.研究结果表明,700℃和800℃时,麦秆底灰中钾主要以KCl和K2SO4形态存在,900℃时则以K2SO4形态存在;温度对城市污水污泥底灰以及混烧底灰中钾的赋存形态影响很小,城市污水污泥底灰中钾主要以KAlSi3O8形式存在,城市污水污泥与麦秆混烧底灰中钾除了以KAlSi2O6、KAlSi3O8形式存在外,还存在高熔点的碱金属磷酸盐化合物Ca9MgK(PO4)7.
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