分解炉混煤燃烧最佳底锥入口直径的模拟研究  

Simulation Study on the Optimum Bottom Cone Inlet Diameter of Coal Blends Combustion in the Precalciner

作　　者：徐顺生[1,2] 武浩[1] 刘飞虹[1] 杨易霖[1] 时章明[2] 欧文剑[1] 肖逸奇 

机构地区：[1]湘潭大学机械工程学院,湘潭411105 [2]中南大学能源科学与工程学院,长沙410083

出　　处：《硅酸盐通报》2016年第8期2383-2388,共6页Bulletin of the Chinese Ceramic Society

基　　金：国自科重大项目(51590891);湖南省科技计划项目(2011SK3211);郴州市重大科技计划项目(CZ2013163)

摘　　要：针对某水泥厂5500 t/d三喷腾型分解炉,采用数值模拟方法,对温度场、速度场、组分浓度场进行仿真研究,得到了底锥入口直径变化时炉内混煤燃烧规律和碳酸盐分解规律,确定了仿真条件下最佳入口直径,并通过现场测试验证了仿真计算模型的可靠性。通过仿真研究结果综合评价,确定计算条件下最佳入口直径为2.0 m,此时,炉内流场合理,高温区范围最大,且其温度值能满足生料分解要求,煤粉燃尽率为91.87%,生料分解率为94.42%。Using numerical simulation method carried out the temperature field, velocity field and component concentration field on a cement plant of 5500 t/d triple-spouting precalciner, it shows that coal blends combustion and the decomposition of carbonate in the precalciner and the optimal inlet diameter are obtained as the change of bottom cone inlet diameter. And the reliability of the simulation model is verified by the field test. Based on the simulation results, the optimal inlet diameter is 2 m under the condition of calculation. At this point, the flow field inside the furnace is reasonable and high temperature region is maximum. The temperature can satisfy the requirements of decomposition of raw materials, the coal combustion rate was 91.87%, the rate of decomposition of raw material was 94. 42%.

关 键 词：分解炉 混煤 燃烧 数值模拟 耦合 

分 类 号：TQ170[化学工程—硅酸盐工业]