摘要
针对大型机组汽动给水泵在低负荷下,仅靠改变主汽轮机抽汽点来满足小汽轮机进汽参数的方法经济性不够好,提出了在原汽动系统中加装压力匹配器,并利用主机高压抽汽引射低级抽汽的改造方案。以某300 MW机组为例,分析其不同方案下各引射系数及相关理论,通过改造前后的能耗比较,加装压力匹配器可节能10%~15%,为工程应用提供理论依据。
Aiming at the problem of steam feed water system of large units under low load,the economy is not a good enough method for the extraction of main steam turbine changing the point to meet inlet steam parameters of small steam turbine. A modification scheme is proposed which uses pressure adapter in the original steam system and uses high-section extraction drive low-section extraction in main steam turbine.Taking a 300 MW unit as an example,injection coefficients and related theories are analyzed in different cases. By comparing the difference in energy consumption before and after system retrofiting,adding pressure adapter can save energy 10%-15% which provides the necessary theoretical basis for the project application.
作者
仲昭勇
王丽萍
于湛铭
ZHONG Zhaoyong;WANG Liping;YU Zhanming(College of Energy and Power Engineering,Northeast Electric Power University,Jilin,Jilin 132012,China;Huadian Electric Power Research Institute Co.,Ltd.,Shenyang,Liaoning 110180,China;Electric Power Research Institute of State Grid Liaoning Electric Power Co.,Ltd.,Shenyang,Liaoning 110006,China)
出处
《东北电力技术》
2018年第8期11-14,19,共5页
Northeast Electric Power Technology
关键词
汽动给水
小汽轮机
抽汽
压力匹配器
引射系数
能耗分析
steam feed water
small steam turbine
steam extraction
pressure adapter
injection coefficients
energy consumption analysis
