基于向心涡轮机发电的工业供热蒸汽能量梯级利用系统性能分析  

Performance analysis of cascade utilization system for industrial heating steamenergy based on centripetal turbine power generation

作　　者：张波 李峰 余志文[2] 顾煜炯[2] 石磊 赵文博[4] ZHANG Bo;LI Feng;YU Zhiwen;GU Yujiong;SHI Lei;ZHAO Wenbo(Huadian Zhangqiu Power Generation Co.,Ltd.,Jinan 250216,China;School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;Shijiazhuang Liangcun Thermal Power Co.,Ltd.,Shijiazhuang 052160,China;National Thermal Power Engineering&Technology Research Center,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华电章丘发电有限公司,山东济南250216 [2]华北电力大学能源动力与机械工程学院,北京102206 [3]石家庄良村热电有限公司,河北石家庄052160 [4]华北电力大学国家火力发电工程技术研究中心,北京102206

出　　处：《热力发电》2023年第8期87-95,共9页Thermal Power Generation

基　　金：中国华电集团科技项目(CHDK21-02-163)。

摘　　要：针对纯凝机组工业供热改造普遍存在供热供需参数不匹配的现象,考虑工业供热高温高压工况下的适用性,提出采用向心涡轮机膨胀做功的方式对抽汽进行供需参数匹配,实现抽汽能量梯级利用。以某国产330 MW热电联产机组工业供热改造为例,构建了热力系统模型,对比传统直接减温减压和采用向心涡轮机发电2种供热参数匹配方案的系统性能,评估系统不同供热流量和变工况下各性能指标的变化规律。计算结果表明,与减温减压方式相比,相同供热参数下向心机涡轮供热参数匹配方案的综合效益显著,额定工况下主机发电煤耗率可降低0.89g/(kW·h),抽汽㶲效率可达97.66%,直接经济效益相对提升1.04%,碳交易成本相对减少0.34%,且系统各方面相对性能优势随系统供热流量的增加而扩大。There is a common mismatch between heating supply and demand parameters for industrial heating retrofits of pure condensing thermal power units,and the benefits of thermal power plants can be improved by adopting a reasonable matching scheme of supply and demand parameter.Aiming at the phenomenon of energy mismatch caused by the excessively high extraction parameters of the unit in the industrial heating scene,considering that it is suitable for high-parameter industrial heating,this paper proposes a scheme of using the centripetal turbines for cascade utilization of extraction steam.Taking the industrial heating transformation of a domestic 330MW cogeneration unit as an example,the thermal system model was constructed to comprehensively evaluate the performance indicators changes of the system from three aspects:thermal performance,exergy environment and economic performance.We also comprehensively compared the effect of upgrading the direct heat reduction and pressure reduction method to the radial turbine power generation steam energy cascade utilization scheme.The calculation results show that under the same heating parameters,compared with the traditional method of temperature reduction and pressure reduction,the comprehensive benefits of the industrial heating steam energy cascade utilization scheme based on centripetal turbine power generation is significant.The standard power generation coal consumption rate can be reduced by 0.89g/kW·h under rated conditions.The specific performance is that under rated conditions,the standard coal consumption rate for power generation can be reduced by 0.89g/kW·h,and the extraction exergy efficiency can reach 97.66%,and the direct economic benefit is relatively increased by 1.04%,and the carbon transaction cost Relative reduction of 0.34%.In addition,the relative advantages of all aspects performance of the system will expand with the increase of the amount of steam extracted by the system for industrial heating.

关 键 词：工业供热 向心涡轮机 热能梯级利用 系统综合评估 

分 类 号：TM621[电气工程—电力系统及自动化]