减温水取水位置对机组热经济性的影响  

Influence of Desuperheating Water Intake Location on the Unit Thermal Economy

作　　者：刘丽君 廖高良 王新军[3] LIU Li-jun;LIAO Gao-liang;WANG Xin-jun(Shanxi Zhongsheng Environmental Technology Development Co.,Ltd,Xi'an,Shanxi, China,Post Code :710043;Hunan University,Changsha,Hunan,China,Post Code :410082;Xi'an Jiaotong University,Xi'an,Shanxi,China,Post Code:710049)

机构地区：[1]中圣环境科技发展有限公司,陕西西安710043 [2]湖南大学机械与运载工程学院,湖南长沙410082 [3]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《热能动力工程》2019年第2期9-13,共5页Journal of Engineering for Thermal Energy and Power

基　　金：中央高校基本科研业务费资助项目(531107051214)~~

摘　　要：喷水减温作为电厂调节蒸汽温度的重要方式,其取水位置对机组热经济性的影响较大。基于"定流量法"变工况分析某200 MW机组过热器减温水、再热器减温水及其不同取水位置对机组热经济性的影响。结果表明:随着负荷的降低,过热器和再热器减温水对机组热经济性的影响均逐渐减小;相比于过热器减温水,再热器减温水对机组热经济性的影响更大;再热器减温水取水位置对机组热经济性的影响由低到高的顺序依次为高压加热器出口、给水泵出口和给水泵中间抽头。Desuperheating spray is an powerful tool for power plant to adjust the steam temperature,and its water intake locations play greatly effects on the thermal economy. This paper presents the influence of water intake locations for superheater and reheater desuperheating water on the thermal economy in a 200 MW unit under variable operating condition based on "constant flow method". The results show that with the decrease of the load,the influence of both superheater and reheater desuperheating water on the unit thermal economy diminishes gradually. Compared to the superheater desuperheating water,the reheater desuperheating water plays greater impact on the unit thermal economy. The effect of the water intake locations for reheater desuperheating water increases gradually in following order: the outlet of high-pressure heater,the outlet of feed pump and then the inter-stage extraction of feed pump.

关 键 词：过热器减温水 再热器减温水 定流量法 热经济性 变工况 

分 类 号：TM621[电气工程—电力系统及自动化]