电站锅炉系统性能仿真模型的建立

1引言根据热力学第二定律，燃料中的化学拥将近一半损失在锅炉的燃烧与传热过程中。因此，优化锅炉性能对降低整个火电机组的煤耗率具有明显效果。完整的锅炉系统由磨煤机、送风机、一次风机、弓讯机、炉膛、汽包、过热器、再热器、省煤器、空气预热器等单元组成，这些单元之间的联结错综复杂。本文建立了锅炉系统中通用单元的性能模型，并在此基础上，对锅炉系统的结构特点进行了分析，利用过程系统工程中的序贯模块法建立了整个锅炉系统的性能模型。对单元的划分、回路的切断及断裂流股的收敛与迭代策略提出了自己的观点。最后根据生产厂…

A PERFORMANCE SIMULATION MODEL OF POWER PLANT BOILER SYSTEM

A static simulation model of power plant boiler system performance is built up byusing the methods of process system engineering. The primary research is proceeded in thesubsystem models, the decomposition method of subsystems and the cutting and convergencestrategy of recycle loops. The corresponding software for simulating the performance of boilersystem is developed. Taking the 670T/h boiler set maed in China in the 100% load pointand the 70% load point are calculated by using our model,the results sre checked with thedata provided by producer. It is further proven that the performance simulation modelhasmore accuracy in application and can meet the reqirements of the unit performance analysisand the prediction of operation behavior.