热力发电Issue(5)：16-20,5.DOI:10.3969/j.issn.1002-3364.2014.05.016
新型干法水泥窑纯低温双压余热发电系统热力参数优化
Thermal parameter optimization for dual pressure waste heat recovery generation system of a new dry process cement kiln
摘要
Abstract
A numerical model that is fit for the dual pressure waste heat recovery generation sys-tem of a new dry process cement kiln was established to make full use of the waste heat of flue gas discharged from the kiln head and preheater.Taking a 5 000 t/d cement production process as the example,the coupling relationship between and among such parameters as exhaust tempera-ture of the boiler with air quenching cooler (AQC boiler)and that with suspension preheater (SP boiler),steam temperature from the high and low pressure section and dryness of the turbine ex-haust were analyzed in detail,and their effects on thermal performance of the whole system were also investigated.Moreover,by optimization on maj or thermal parameters of this waste heat gen-eration system,the steam parameters corresponding to the unit maximum output power were ob-tained.The results show that,the flow rate of steam from high pressure section of the AQC boiler and that from the SP boiler increases with a decrease in exhaust temperature,while that of the steam from low pressure section of the AQC boiler shows an opposite change.As the evaporating pressure reduces,the output power increases first and then drops,its maximum value appears within the range with the high pressure evaporating pressure of 0.9 MPa to 1.1 MPa and the low pressure evaporating pressure of 0.18 MPa to 0.20 MPa.关键词
水泥窑/余热发电/双压系统/最大发电功率/蒸汽参数Key words
cement kiln/waste heat power generation/dual pressure system/maximum generation power/steam parameter分类
能源科技引用本文复制引用
张凯,侯昊,黄高泉,张晓玲..新型干法水泥窑纯低温双压余热发电系统热力参数优化[J].热力发电,2014,(5):16-20,5.基金项目
国家科技支撑计划项目(2011BAA05B03) （2011BAA05B03）
