供热式汽轮机工况图的系统及参数修正方法  

Correction Method about the Working Condition Graph of the Heating Steam Turbine System and Parameter

作　　者：李勇[1] 吕泰萍 王占洲[1] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012

出　　处：《汽轮机技术》2015年第6期401-404,共4页Turbine Technology

基　　金：吉林省科技发展计划重点项目(20110409)

摘　　要：现有的供热式汽轮机工况图,主要是在额定的主蒸汽参数、再热蒸汽参数、排汽参数及抽汽压力下得到的,并且认为回热系统的状态正常。而汽轮机实际运行中,这些参数并不总是保持其额定值不变,同时回热系统状态也不可避免地要偏离设计值,且还存在着过热器和再热器的喷水减温。此时,为了得到电功率与主蒸汽流量及抽汽量之间的关系,就不能直接查取汽轮机的工况图,而必须对其进行修正。给出了在汽轮机回热系统状态及主蒸汽参数、再热蒸汽温度、汽轮机排汽压力以及抽汽压力偏离设计值时的一种修正方法,并以某C330/262-16.7/0.49/538/538型汽轮机为例进行了修正计算。所提出的修正方法对于在实际运行中依据主蒸汽流量和抽汽流量预测汽轮机电功率,具有一定的指导意义。Working condition of the heating steam turbine figure in existence, is mainly obtained in the rated parameters of main steam and reheat steam parameters, the exhaust steam parameters and the extraction steam pressure, and thinking of the regenerative system state is normal. While in the actual operation of the steam turbine, these parameters are not always keep their rating unchanged, regenerative system status also inevitably deviate from the design values, and there is alSO the reduction temperature of superheater and reheater. At this moment, In order to get the relationship among the electrical power and the main steam flow and the amount of extraction,we can＇ t pick up the operation condition of the steam turbine diagram directly, and must correct it. This paper give a modified method about the regenerative system states, main steam turbine parameters, regenerative system parameters, the reheat steam temperature, steam turbine exhaust steam pressure and extraction steam presstire deviating from the value of the design, and process the correct calculation with a certain C330/262 -16.7/0.49/538/538 type steam turbine as an example. The proposed correction method also has a certain guiding significance of predicting steam turbine electric power according to the main steam flow and extraction steam flow in the actual operation.

关 键 词：供热式汽轮机 工况图 修正方法 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]