600 MW纯凝改供热空冷机组余压余热联合利用改造分析  

Analysis on Retrofit for Combined Utilization of Residual Pressure and Waste Heat of a 600 MW Pure Condensing to Heating Air Cooling Unit

作　　者：刘秋升 袁珍亮 安江涛 周明君 李永良 李琼 Liu Qiusheng;Yuan Zhenliang;An Jiangtao;Zhou Mingjun;Li Yongliang;Li Qiong;无(Hebei Jiyan Energy Science and Techonlogy Research Institute Co.,Ltd.,Shijiazhuang 050000,China;Hebei Technology Innovation Center of Thermal Power Clean Efficient and Cogeneration,Shijiazhuang 050000,China;Hebei Jiantou Shahe Power Generation Co.,Ltd.,Xingtai 054100,Hebei Province,China)

机构地区：[1]河北冀研能源科学技术研究院有限公司,石家庄050000 [2]河北省火力发电清洁高效热电联产技术创新中心,石家庄050000 [3]河北建投沙河发电有限责任公司,河北邢台054100

出　　处：《发电设备》2022年第4期287-292,共6页Power Equipment

摘　　要：以某600 MW纯凝改供热空冷机组为例,提出采用低压汽轮机和蒸汽喷射器余压余热联合利用方案,并且对该机组进行节能分析。将供热期分为4个阶段,分析讨论不同供热阶段热耗率的变化,同时计算改变机组背压、热网循环水流量时蒸汽喷射器回收乏汽量和低压汽轮机发电功率的变化。计算结果表明:机组收益最优运行方式为30 kPa机组背压、最大热网循环水流量;在该运行方式下,回收乏汽量最大,低压汽轮机发电功率最高,节能收益最大。Taking a 600 MW air cooling unit from pure condensing to heating as the research object,the combined utilization of residual pressure and waste heat was proposed through using the steam ejector and the low-pressure steam turbine,and analyses were conducted on this unit for energy saving.The heating period was divided into four stages,and the change of the heat consumption rate in different heating stages was analyzed.The changes of the steam injector recovery exhaust steam quantity and the low-pressure turbine power were calculated under different back pressures of the unit and circulating water flows of the heating network.Calculation results show that,with the operation mode of the 30 kPa back pressure of the unit and the maximum circulating water flow of the heating network,the optimal benefit of the unit can be obtained with the largest amount of waste steam,the highest power of low-pressure steam turbine,and the largest benefit of energy saving.

关 键 词：空冷机组 余压 余热 蒸汽喷射器 节能降耗 

分 类 号：TM621.4[电气工程—电力系统及自动化]