“煤等含碳固体原料大规模高效清洁气化的基础研究”年度报告

The Fundamental Research of Large-scale,High-efficiency and Clean Gasification of Coal and Other Carbonaceous Solid Material

煤炭是我国的基础能源和战略原料。该研究紧密围绕气化技术向大型化、多原料适应性、近零排放等目标推进过程中出现的一些亟待解决的关键科学问题,开展基础研究。该研究的实施将推进具有自主知识产权的煤气化技术向大规模、高效、清洁化跨越,支撑煤基大宗化学品和液体燃料合成、IGCC发电、制氢、燃料电池、直接还原炼铁及多联产系统等过程工业的发展,保障国家能源安全,是国民经济和社会可持续发展的客观要求,非常必要,十分紧迫。拟解决的关键科学问题是:煤等多种含碳固体原料高温高压气化反应动力学、共气化过程的相互作用机理及微量有害元素的迁移转化规律;高温、高压下湍流多相混合与非均相反应过程耦合机理、过程强化及火焰结构特征;高温、还原性气氛下熔渣形成机理、流变特性及传热机理;多种原料高浓度浆体制备及超浓相气力输送特性与规律。预期目标是:完善大规模高效清洁煤气化过程的理论体系。在适应灵活原料气化、煤等含碳固体原料CO2超浓相输送、低阶煤改性制高浓度水煤浆、多种原料共气化机理、微量有害元素迁移转化机理、气化炉内多相混合与热质传递、高温高压下熔渣流动与传热、气化系统集成优化等方面取得理论突破,支撑关键技术的发展,推动气化技术的跨越。

Coal is the basic energy resource and strategic raw material in china. The project focuses on the fundamental study of some key scientific issues, which are needed to be resolved urgently during the developing process of gasificaton technology to large-scale, multi-adaptive materials, near-zero emissions etc. The project will promote gasification technology with self-owned intellectual property rights to be large-scale, highly efficient and clean, and support industry development such as synthesis of coal-based chemicals and liquid fuels, IGCC power generations, industrial hydrogen manufacturing, fuel cells, direct reduction iron-making and polygeneration systems, and ensure national energy security. The project is the objective requirements of the national economic and social sustainable development, and is very necessary and pressing. Key scientific problems of this program： The gasification kinetics of coal and other carbonaceous solids at high pressure and high temperature,the interaction mechanism of co-gasification,and the migration and conversion laws of harmful trace elements;The coupling mechanism, process intensification and flame structure characteristics of multiphase turbulence mixing and non-homogeneous reactions at high pressure and high temperature; The formation mechanism, rheological properties and heat transfer mechanism of slag at high temperature and reducing atmosphere; The preparation of high concentration slurry with a wide range of raw materials,and the pneumatic conveying characteristics and laws of super dense phase. Anticipated targets of this program： Improve theoretical system of the large-scale, high efficiency efficient and clean coal gasification process. Promote the theories of flexible raw materials gasification, the super-high dense phase conveying of coal and other carbonaceous solids via CO2, the preparation of high concentrated slurry through low rank coal modification , the co-gasification mechanism of multiple materials, the migration and transformation laws of hazardous elements, the multi-phase mixing and heat and mass transfer insider the gasifier, the slag flow and heat transfer at high temperature and high pressure, the integration and optimization of gasification system and other aspects. Use these theories to support the development of key technology and drive the gasification technology to transcend.