汽轮机回热抽汽量与主蒸汽流量关系分析  

Relationship between main steam flow and regenerative extraction steam flow in steam turbines

作　　者：李勇[1] 王帅[1] 曹丽华[1] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《热力发电》2014年第8期47-51,59,共6页Thermal Power Generation

基　　金：吉林省科技发展计划资助项目(20110409);吉林省教育厅"十二五"科学技术研究项目(吉教科合字【2012】第93号)

摘　　要：以某300MW和660MW机组为例,对不同工况下机组回热抽汽量与主蒸汽流量之间的关系进行了计算与分析,得出了偏离额定工况幅度对回热抽汽份额的影响。结果表明,当机组偏离额定工况时,其H7回热抽汽份额均与其额定工况的回热抽汽份额误差较大;而对于其他加热器,只有在不同的允许误差条件下,才可以认为各段回热抽汽量与主蒸汽流量成正比;偏离额定工况的幅度越大,导致回热抽汽份额的相对误差也越大。Taking a 300 MW unit and a 660 MW unit as the examples,the relationship between main steam flow and regenerative extraction steam flow under different conditions was analyzed.Moreover,the influence of deviation range from rated condition on regenerative extraction steam share was obtained.The results show that,when the unit runs under non-rated condition,the relative error between the H7 regenerative extraction steam share and that under rated condition is great;while for other heaters,the regenerative extraction steam flow in each section is considered be proportional to the main steam flow,only under different allowable error conditions;the larger the range deviated from the rated condition,the greater the relative error will be.

关 键 词：300MW机组 660MW机组 汽轮机 回热抽汽量 主蒸汽流量 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]