摘要
将高温烟气滚筒干燥装置与机组锅炉系统耦合,建立了高温烟气干燥褐煤理论分析计算模型,提出了预干燥所需高温烟气流量与机组经济性评价方法。计算结果表明:采用烟气预干燥技术可将水分为38%的褐煤分别干燥到水分为27%,20%和14%,机组发电标准煤耗分别降低1.39,2.10,0.96g/(kW·h);烟气预干燥褐煤机组排烟温度每降低1℃,发电标准煤耗约减少1.3g/(kW·h);褐煤预干燥程度应结合锅炉排烟热损失与干燥机热损失综合考虑,以实现机组最佳经济性。
Through coupling the high flue gas rotary drier together with the boiler system,the theoretical analysis model of high flue gas pre-drying lignite was established.The method to calculate the high flue gas flow needed for pre-drying and evaluate the unit economy was proposed.The calculation results show that,the coal consumption rate can be reduced by 1.39,2.10 and 0.96g/（kW·h）,by using the flue gas pre-drying technology to lower the moisture of the lignite from 38%to 27%,20% and 14%,respectively.With a10 degree centigrade decrease in the exhaust gas temperature of the pre-drying lignite power plant,the coal consumption rate can be reduced by 1.3g/（kW·h）.In order to achieve the optimum economy,the heat loss due to exhaust gas and the dryer heat loss need to be considered together to determine the level of predrying lignite.
出处
《热力发电》
CAS
北大核心
2016年第6期5-10,共6页
Thermal Power Generation
基金
中国华能集团公司总部科技项目(HNKJ13-H02)
关键词
褐煤
烟气预干燥
发电标准煤耗
排烟温度
排烟热损失
发电效率
经济性
lignite
flue gas pre-drying
standard coal consumption rate
exhaust temperature
heat loss due to exhaust gas
generating efficiency
economy
