轻烧MgO气流床式煅烧炉燃烧室热工特性  

Thermal Characteristics of Combustion Chamber of Light-Fired MgO Entrained-Flow Calciner

作　　者：董禹杉 赵亮[1] 董辉[1] 王德喜[2] DONG Yushan;ZHAO Liang;DONG Hui;WANG Dexi(National Key Laboratory of Environmental Protection and Ecological Industry,Northeastern University,Shenyang 110819,China;School of Environmental and Chemical Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]东北大学国家环境保护生态工业重点实验室,辽宁沈阳110819 [2]沈阳工业大学环境与化学工程学院,辽宁沈阳110870

出　　处：《工业炉》2022年第3期1-6,共6页Industrial Furnace

基　　金：新一代轻烧氧化镁闪速旋流动态煅烧系统应用示范(2021JH1/10400030)。

摘　　要：以某年产5万t轻烧MgO气流床式煅烧炉的卧式燃烧室为研究对象,探究燃烧室结构参数和操作参数对燃烧室热工特性的影响。研究表明:影响燃烧室热工特性的主要因素是冷却风入口位置、燃烧室长度和烟气掺混比。其中,冷却风从根部同向进风的燃烧室出口温度满足年产5万t闪速炉的生产要求且NO_(x)排放量较低;在生产可调范围内,燃烧室长度或烟气掺混比的增加将使燃烧室出口烟气温度和NO_(x)排放量降低。在根部同相进风条件下,适宜的结构参数和操作参数为:燃烧室长度7 510 mm,烟气掺混比10%,此时,燃烧室容积热负荷为235.85 kW/m^(3)。Horizontal combustion chamber with an annual production capacity of 50 000 t light-fired MgO air-bed calciner was used as the research object to investigate the influence of structural parameters and operating parameters on the thermal characteristics of the combustion chamber.The study shows that the main factors affecting the thermal characteristics of the combustion chamber are the position of the cooling air inlet,the length of the combustion chamber and the mixing ratio of the flue gas.Among them,the exit temperature of the combustion chamber with cooling air entering from the root in the same direction can meet the production requirements of 50 000 t per year flash furnace and the NO_(x)emission is lower;in the production adjustable range,the increase of combustion chamber length or the mixing ratio of flue gas will reduce the exit flue gas temperature and NO_(x)emission of the combustion chamber.Under the condition of in-phase air inlet at the root,the appropriate structural and operational parameters are as follows:the length of combustion chamber is 7 510 mm,and the mixing ratio of flue gas is 10%.At this time,the volume heat load of the combustion chamber is 235.85 kW/m^(3).

关 键 词：轻烧MgO气流床式煅烧炉 燃烧室 热工特性 NO_(x)排放 数值模拟 

分 类 号：TF806.1[冶金工程—有色金属冶金]