采用两级节流控制超临界锅炉水冷壁热偏差  

CONTROLLING OF WATER WALL THERMAL DEVIATION OF SUPERCRITICAL PRESSURE BOILER BY USE OF TWO- STEP THROTTLE SCHEME

作　　者：陈听宽[1,2] 徐进良[1,2] 吴履琛[1,2] 刘宝森[1,2] 王晓为[1,2] 陈春达 

机构地区：[1]西安交通大学 [2]哈尔滨锅炉厂

出　　处：《西安交通大学学报》1995年第11期19-25,共7页Journal of Xi'an Jiaotong University

摘　　要：依据作者提出的超临界垂直管圈一次上升水冷壁的水动力计算模型及墙间热负荷分布，进行了不同节流方式下的水动力计算；探讨了不同节流方式对水动力特性的影响，提出了节流方式的优化方案；给出了两级节流方式下水动力计算的主要结果，同时还给出了考虑吸热量增加１０％及横向吸热曲线偏斜的恶劣工况下的计算结果，表明以５７％负荷率为选择节流圈的基准负荷率，采用两级节流方式能保证水冷壁的安全工作。Based on the program for prediction of the hydrodynamic characteristics of supercriticalboiler with primary riser vertical tube coils and the heat flux distributions predictions of thehydrodynamic characteristics for different throttle schemes were conducted , the influence ofdifferent throttle scheme on the hydrodynamic characteristics was investigated , therefore , anoptimum throttle scheme was presented. The main prediction results were given for two-stepthrottle scheme, at the same time, the prediction results as the heat absorption is assumed toincrease by l0 percentage and as the heat absorption curve with width dimension is assumedto deviate were also given, The conclusion is that the water wall safety can be ensured with57%MCR being the standard design load for two-step throttle scheme.

关 键 词：超临界锅炉 热偏差 水冷壁 节流 

分 类 号：TK229.2[动力工程及工程热物理—动力机械及工程]