干法水泥线余热闪蒸发电系统热工参数计算分析.pdfVIP

干法水泥线余热闪蒸发电系统热工参数计算分析 1 董陈，周屈兰，赵钦新，徐通模，惠世恩 (西安交通大学能源与动力工程学院，陕西，710049) 摘要：针对某5000t/d 干法水泥生产线纯低温余热利用设计了纯低温余热复合闪蒸发电系统，对系统特性 关键参数的计算公式进行了理论求解，并且对影响系统发电功率的窑尾余热锅炉高压蒸汽温度、高压蒸汽 压力、窑尾余热锅炉给水温度、系统给水温度和低压蒸汽压力这个五个参数设置了计算工况进行计算分析， 计算得到了系统发电功率与各个参数的特性曲线，结果表明：随着窑尾余热锅炉高压蒸汽温度、高压蒸汽 压力、窑尾余热锅炉给水温度和系统给水温度这四个因素取值的增加，系统发电功率是增加的；随着低压 蒸汽压力的增加，系统发电功率是降低的。在进行水泥窑余热发电系统参数选取时，应对系统发电功率和 经济性进行综合考虑选取适合的参数。 关键词：动力机械工程；余热发电系统；计算分析；热工参数；闪蒸 中图分类号：TK11+5 文献标识码：A Calculation and analysis on thermal parameters of dry cement waste heat power generation system with flash evaporation Dong Chen, Zhou Qu-lan, Zhao Qin-xin, Xu Tong-mo, Hui Shi-en (Xi’an Jiaotong University, School of Energy and Power Engineering, Xi’an, 710049, China) Abstract: A pure cryogenic residual heat power generation system with flash evaporation is designed for new cement dry kiln of 5000t/d. The formulas to calculate some key parameters of the system are deduced. The influences of system parameters to generation power are studied. The relationship between system parameters and generation power of system is also obtained. The results show that with the increase of main steam temperature and pressure, feed water temperature of suspension pre-heater heat recovery steam generator, and feed water temperature of the system, the generation power of system rises. And with the decrease of flash evaporation steam pressure, the generation power of system reduces. On choosing system parameters, the generation power and economy of the system should be considered together in order to gain the best economic benefit. Key Words: Power and mechanical engineering, Residual heat generating system, Calculation and analysis, Thermal parameters, Flash evaporation 1基金项目：国家863计划项目大型干法水泥线纯低温余热发电双压技术(2007AA05Z251)；十一五国家科 技支撑计划项目(2006B