水泥窑协同处置含油污泥污染物迁徙转化及矿物形成的全程靶向调控

As a hazardous waste, the harmless treatment and recycling of oily sludge is one of an urgent problem in the field of petroleum industries and environmental protection. At present, co-processing of oily sludge in cement kiln is one of the most promising and advanced safety technology. Moreover, the regulation of pollutant transformation and clinker mineral formation presents as key and difficulty of the high effective and clean energy conversion in cement kiln co-processing of oily sludge.. In this project, based on the assumption of quenching and tempering, process regulation, target induction and synergistic coupling, the quenching and tempering of oily sludge, synergistic coupling enhanced co-combustion of oil sludge and coal, the regulation of clinker mineral phase formation, and the non-toxic target induction and blocking mechanism of pollutants migration cement kiln co-processing of oily sludge are investigated, revealing the regulating mechanism of the synergistic coupling enhanced co-combustion process of oily sludge and coal in the precalciner, clarifying the formation mechanism of clinker mineral phase and solution of heavy metal in clinker mineral phase and understanding the non-toxic target induction and blocking mechanism of key pollutants such as VOCs, dioxins and heavy metals. The theoretical framework of target regulation on combustion, the clinker mineral formation and the pollutant transformation in cement kiln co-processing of oily sludge is constructed. Results will not only solve the key scientific problems involved in the oily sludge co-processing in cement kilns, supplying theoretical information for realizing harmless disposal and high effective utilization of oily sludge, but also provide a significant opportunity for the strategic transformation and upgrading of China's cement industry.

危险废物含油污泥的无害化处置是石油行业和环境保护亟待解决的核心问题。水泥窑协同处置含油污泥是最具前景且安全的先进终端技术，而污染物迁徙转化及矿物形成的全程调控方法是实现协同处置含油污泥高效清洁资源化利用的关键和难点。. 本项目拟基于高值调质、过程调控、靶向诱导和协同耦合的设想，开展含油污泥高值调质、耦合强化燃烧、熟料矿物相形成以及全程污染物迁徙转化的系统研究，揭示分解炉中含油污泥-煤粉耦合强化稳定燃烧的调控机制，明晰复杂组分交互作用下熟料矿物相形成机理及重金属高温氧化-矿物相固溶机制，掌握氮/硫、VOCs和二噁英等污染物迁徙转化与靶向调控方法，构建保障水泥窑安全运行、高熟料品质和近零排放的协同处置含油污泥基础理论体系。研究结果将不仅解决水泥窑协同处置含油污泥的关键科学问题，对于实现含油污泥无害化处置和高效资源化利用具有重要的理论价值，而且为我国水泥工业战略转型升级提供重大契机。

含油污泥是石油开采、运输、精炼、含油污水处理等过程中产生的固体废物，含油污泥中携带了多环芳烃、二噁英、重金属元素等多种剧毒污染物，水泥窑协同处置含油污泥是最具前景且安全的先进终端技术，而污染物迁徙转化及矿物形成的全程调控方法是实现协同处置含油污泥高效清洁资源化利用的关键和难点。.本项目基于高值调质、过程调控、靶向诱导和协同耦合的设想，开展含油污泥高值调质、协同强化燃烧、熟料矿物相形成以及全程污染物迁徙转化的系统研究，主要研究成果与创新之处如下：（1）厘清了并且掌握了含油污泥样品理化特性。（2）明确了含油污泥高值化调质与强化燃烧方法，综合评价了调质含油污泥的燃烧特性；（3）探明了调质含油污泥-煤粉混合燃烧特性及其协同促燃作用；（4）揭示了调质含油污泥、煤粉单独及混合燃烧过程中污染气体排放特性，探明了燃烧气氛与添加剂对污染气体排放的调控作用；（5）阐释了调质含油污泥-煤粉混合燃料掺烧对水泥熟料烧成的影响，明确了重金属在熟料中的固化规律。本项目研究成果将不仅解决水泥窑协同处置含油污泥的关键科学问题，对于实现含油污泥无害化处置和高效资源化利用具有重要的理论价值，而且为我国水泥工业战略转型升级提供重大契机。