摘要
作为高耗能工艺,水泥炉窑能耗占建材产业总能耗的50%以上,提高其节能水平至关重要.基于一套运行产量为4000t/d的水泥生产线,通过理论方法,分析了热风再循环技术方案效果,得到了不同工况下,环境温度、烟气-水换热器进气温度、新风量分配对节煤率和需要引入新风量的影响.结果表明:节煤率随环境温度的升高而升高,而烟气-水换热器进气温度和进入锅炉中新风比例的升高均有利于降低总新风量和提高节煤率.当锅炉参数保持不变,换热器进气温度为200℃,环境温度为30℃时,节煤率可达0.86%,对应新风量为2.97×10^4 Nm^3/h.
As a high energy consuming process,the energy consumption of cement kiln consumes more than 50%of the total energy consumption of building materials industry.Therefore,it is of great importance to save energy in the cement kiln system.Based on a cement production line with a production of 4000 t/d,the effect of a hot air recirculation technology was analyzed theoretically.The impact of parameters,such as ambient temperature,inlet temperature of heat exchanger and fresh air distribution,on fresh air needed and coal saving ratio was analyzed under different working conditions.The results show that the coal saving ratio increases with increasing the ambient temperature.It is helpful for decreasing the total fresh air flow rate and increasing the coal saving ratio to increase the fresh air flow rate in boiler and the inlet temperature of the heat exchanger.When the operating parameters of the boiler keep constant and the inlet temperature of the heat exchanger is 200℃,the coal saving ratio reaches up to 0.86%with the ambient temperature of 30℃.The corresponding fresh air flow rate is 2.97×10^4 Nm^3/h.
作者
李冰
潘利生
魏小林
史维秀
李锐
LI Bing;PAN Li-sheng;WEI Xiao-lin;SHI Wei-xiu;LI Rui(School of Environment and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;State Key Laboratory of High-temperature Gas Dynamics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第10期3344-3348,3354,共6页
Bulletin of the Chinese Ceramic Society
基金
国家重点研发计划(2016YFB0601504)
关键词
水泥炉窑余热利用
热风再循环
节煤率
waste heat utilization of cement kiln
hot air recirculation
coal saving ratio
