转炉烟气余能回收利用技术发展现状与展望

转炉炼钢是钢铁生产的关键环节，其产生的烟气含有大量余热和化学余能，但也具有烟气产生不连续、含尘量高、易燃易爆的特性，如何高效清洁地回收和利用转炉烟气余能是钢铁行业的热点问题。对转炉烟气余能回收利用的现状进行了介绍，重点总结了转炉烟气余能回收和利用过程中存在的典型问题，对一些新式转炉烟气余能回收技术进行了介绍和评价，展望了未来转炉烟气余能回收利用技术的发展方向。目前广泛应用的氧气转炉煤气回收法(oxygen converter gas recovery, OG)、由Lurgi公司和Thyssen公司联合开发的LT法(Lurgi-Thyssen)等转炉烟气余能回收利用技术在防爆和除尘方面具有良好的效果，但也存在中低温烟气余热未回收、高温烟气余热利用■损失大、转炉煤气回收水平低、环境污染严重的问题，以转炉烟气热化学储能技术为代表的新式技术为以上问题的解决提供了新思路。结合旧技术的缺陷和新技术的研究进展得出，未来转炉烟气处理工艺提高节能减排水平的关键是实现中低温烟气余热深度回收、高参数蒸汽发电、烟气余能梯级回收利用、能源资源环境一体化。

The Development Status and Outlook of Converter Flue Gas Waste Energy Recycling Technology

Converter steelmaking is a key process of steel production and contains a large amount of waste heat and chemical residual energy, but it also has the characteristics of discontinuous flue gas generation, high dust content, and flammability and explosiveness. A pressing concern in the steel industry is how to effectively and cleanly recycle and utilize converter flue gas waste energy. The current situation of waste energy recovery and utilization of converter flue gas, common issues encountered during this process, new converter flue gas waste energy recovery technologies, their evaluation, and the direction of converter flue gas waste energy recovery and utilization technologies'' future development are all covered in this paper. At present, the widely used OG method, LT method, and other converter flue gas waste energy recovery and utilization technologies have good effects in explosion-proof and dust removal, but there are also problems of unrecovered waste heat of medium and low temperature flue gas, large loss of waste heat utilization of high temperature flue gas, low level of converter gas recovery, and serious environmental pollution. The new type of technology represented by converter flue gas thermochemical energy storage technology provides new ideas to solve the above problems. Combining the defects of the old technology and the research progress of the new technology, it is concluded that the key to improving the energy saving and emission reduction levels of the future converter flue gas treatment process is to realize the deep recovery of low and medium temperature flue gas waste heat, high parameter steam power generation, flue gas waste energy gradient recovery and utilization, and the integration of energy resources and the environment.