电炉烟气余热利用蓄热方案探讨  

Discussion on Heat Storage Scheme for Flue Gas Waste Heat Utilization in Electric Furnace

作　　者：吴娅 王方明 王毅 WU Ya;WANG Fangming;WANG Yi(CISDI Thermal and Environment Engineering Technology Co.Ltd,Chongqing 401147,China)

机构地区：[1]重庆赛迪热工环保工程技术有限公司,重庆401147

出　　处：《冶金动力》2024年第6期93-97,共5页Metallurgical Power

摘　　要：短流程电炉冶炼生产为间断性生产,电炉烟气余热利用能效一直较低,传统回收方式为余热锅炉回收,蓄热器作为缓存装置,产生中低温饱和蒸汽供发电机组发电。近期,有相关学者提出了烟气熔盐储能的概念,即利用熔盐回收电炉烟气余热,熔盐储能系统替代蒸汽蓄热器作为间歇生产缓存单元,以提高蒸汽品质、增加发电量。为分析对比两种方案的技术经济性,以四川某钢铁厂75 t/h电炉为例,比较蒸汽蓄热器储能和熔盐储能的技术经济性。通过分析得出,采用蒸汽蓄热器作为缓存的储能方式技术性和经济性更优。The short-flow electric furnace smelting production belongs to intermittent production,the energy efficiency of electric furnace flue gas waste heat utilization has been low.The traditional recovery method adopts waste heat boiler with the heat accumulator as a cache device,generating low and medium temperature saturated steam for the generating unit to produce electricity.Recently,some scholars have proposed the concept of flue gas molten salt energy storage,which uses molten salt to recover flue gas waste heat from elec⁃tric furnaces and molten salt energy storage system to replace the steam accumulator as an intermittent production caching unit,so as to improve the quality of the steam and increase the power generation.In order to analyze and compare the technical and economic perfor⁃mance of the two solutions,the technical and economic performance of steam heat accumula⁃tor energy storage and molten salt energy storage is compared with the example of a 75 t/h electric furnace in a steel plant in Sichuan.Through the analysis,it is concluded that the use of steam accumulator as a cache of energy storage method is technically and economi⁃cally superior.

关 键 词：电炉 发电 熔盐 蓄热 

分 类 号：TK02[动力工程及工程热物理]