摘要
传统的热电联产抽汽供热方式供热能力低、电量损失大、机组综合能耗高、(火用)效率低。采用湿冷机组低位能分级加热供暖技术对350 MW超临界供热机组进行节能改造。运行结果表明:在相同的主蒸汽量条件下,改造后供热能力增加35%、发电功率增加8%以上;在年供暖量增加188.65万GJ的同时,供热期发电量增加83.9 GW·h,供热期效益年增长约9 341.6万元。改造后社会节煤12.69万t,CO2减排33万t。
The extraction of steam for heat supply in traditional combined heat and power generation plant is found with several issues such as low heating capacity, large power loss, high comprehensive energy consumption and low exergy efficiency. In this paper, the low-grade energy heating technology on the basis of heat classifications for wet cooling units is utilized in the energy saving retrofit project of a 350 MW supercritical cogeneration unit. The operation results indicate that after the retrofit, the heating capacity and the power generation output of the unit increased by 35% and over 8% respectively under the same main steam mass flow. In addition, as the annual heating capacity is expanded by 1.886 5 million GJ, the power generation output has increased by83.9 million kW·h with year-over-year revenue growth about 93.416 million RMB during the heat supply period. That means after the completion of the retrofit project 126.9 thousand tons of coal equivalent have been saved for the social society and the CO2 emission has been reduced by 330 thousand tons.
作者
周国强
孙显明
ZHOU Guoqiang;SUN Xianming(GD Power Dalian Development Area Co-generation Power Plant,China Energy Corporation,Dalian 116600,China)
出处
《中国电力》
CSCD
北大核心
2019年第11期134-137,184,共5页
Electric Power
关键词
超临界机组
低位能供暖技术
供热
节能潜力
supercritical generation unit
low-grade energy heating technology
heating
energy saving potential
