污泥掺烧过程中Cl/S/P交互作用对重金属迁移转化和脱除影响的机理研究

项目名称： 污泥掺烧过程中Cl/S/P交互作用对重金属迁移转化和脱除影响的机理研究

项目编号： No.51308132

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 建筑科学

项目作者： 刘敬勇

作者单位： 广东工业大学

项目金额： 25万元

中文摘要： 污泥掺烧中重金属的排放会对环境造成严重危害，而Cl/S/P是诱发重金属迁移转化的关键因子。本小组前期研究表明焚烧中Cl/S可改变重金属的迁移途径，而P在污泥中普遍存在。在Cl/S/P交互作用的掺烧体系中，重金属与Cl/S/P必然发生竞争化学反应，而此反应对重金属迁移转化及脱除影响的机理尚不清楚。本课题拟采用实验模拟及热力学理论计算相互验证方法，通过管式炉模拟污泥焚烧及重金属脱除过程，利用BCR法及FAAS、XRD等手段获得重金属分布及形态变化规律，并跟踪其中间产物及相变过程，定量描述重金属在交互条件下的蒸发、均相/非均相反应；采用热力学平衡模型跟踪重金属化学反应路径，解析重金属与Cl/S/P及Ca/Si/Al氧化物之间的交互作用规律，根据重金属类别、分布、形态、迁移特性、毒性等，阐明Cl/S/P交互作用对重金属迁移转化和脱除的影响，为进一步控制污泥焚烧或掺烧过程中重金属的排放提供科学依据。

中文关键词： 焚烧掺烧；重金属；Cl-S-P交互作用；迁移转化；污染控制

英文摘要： The emissions of heavy metals will cause serious harm to the environment during the sludge co-incineration process and the typical composition of chlorine, sulfur and phosphorus are the key factors induced the migration and transformation of heavy metals.. The previous study showed that the chlorine or phosphorus can promote or inhibit the volatilization of heavy metals during the sludge incineration process and which can change the heavy metals reaction and transformational process. However, under the interaction of chlorine, sulfur and phosphorus, the competition chemical reaction will occur between the heavy metals and chlorine, sulfur and phosphorus or with the interaction of heavy metals, chlorine, sulfur and phosphorus. But the effects of the competitive reaction on the transportation of heavy metals and their simultaneous removal process mechanism are unclear. The simulation incineration experiments and thermodynamic theory mutual authentication are concerned to study the migration and transformation behavior and removal control of heavy metals induced by the interaction of chlorine, sulfur and phosphorus during the sludge incineration. The sludge incineration and adsorption removal process were simulated with the tube furnace. The heavy metal distributions and their fractions were investigated with the s

英文关键词： sludge co-incineration；heavy metal；interaction of chlorine;sulfur and phosphorus；migration and transformation；pollution control