煤炭中重金属富集运移转化机理研究

项目名称： 煤炭中重金属富集运移转化机理研究

项目编号： No.51274262

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 李东伟

作者单位： 重庆大学

项目金额： 61万元

中文摘要： 保障环境安全，防治重金属污染是社会关注的热点话题。燃煤重金属污染物是典型的环境毒性物质，具有不可降解性、污染持续时间长等特性。我国的主要能源为煤炭，随着国民经济的发展，对煤炭的需求增大，燃煤过程中重金属污染物大量进入环境，出现了区域性重金属污染中毒的现象。本项目以煤炭中的重金属污染物为研究对象，对煤炭中的重金属污染物的富集形态、燃煤过程中重金属运移转化规律进行基础科学研究。具体内容包括：设计适用于煤燃烧重金属污染物监测的燃烧试验装置；测定不同煤层原煤中重金属赋存形态；研究燃煤过程中不同形态重金属元素析出特性；研究燃煤过程中不同形态重金属元素的运移规律及其及其影响因素；改进和完善燃煤重金属元素的化学热力学模型；通过实验室试验，建立燃煤过程中重金属污染物的释放的数学模型。本项目旨在揭示燃煤过程中重金属元素的富集、运移和转化规律，为有效控制燃煤重金属污染和研制新型燃煤污染物。

中文关键词： 煤燃烧；重金属；迁移转化；释放模型；调制碳酸钙

英文摘要： The environmental safety and heavy metal pollutant prevention are one of the hot topics in our society. Heavy metal pollutant is the typical environmental toxicity material with non-degradability and long time of duration. Along with the development of the national economy, the demand of the coal has increased, a large amount of heavy metal pollutant has entered into the environment, the heavy metal pollutant toxic phenomenon appeared. In this project, the heavy metal pollutant during the combustion process is chosen as the research object and the heavy metal pollutant enrichment, migration and transformation rule would be studied in the basic scientific research. The content is shown as follows. The test unit is designed for the heavy metal pollutant monitoring; The occurrence form of the heavy metal in the different coal seam would be measured; The heavy metal element volatilization character would be studied and the related mathematical model should be established during the process in the coal combustion. the heavy metal pollutant enrichment, migration and transformation rule and its influencing factors would be studied. The chemical thermodynamic model of the heavy metal pollutant would be improved. Through the bench-scale experiment, the mathematical model that reveal the release of the heavy metal polluta

英文关键词： Coal combustion；Heavy metals；Migration and transformation；Release model；Modified CaCO3