RESEARCH ON THE HYDRAULIC CHARACTERISTICS OF A 600MW SUPERCRITICAL PRESSURE CFB BOILER
Water wall design is a key technology of supercritical pressure CFB boiler. On account of the low heat flux and its homogeneous distribution in furnace, internally ribbed tubes with low mass flux and smooth tubes with moderate mass flux can be applied in the water wall of supercritical CFB boilers. An experimental research on the flow and heat transfer characteristics of internally ribbed tubes and smooth tubes with different inner diameters was conducted in the range of sub-critical and supercritical pressure. The departure from nucleate boiling (DNB) and dry-out boundary and the empirical correlations of heat transfer are obtained from the experiments. The mathematical model for predicting the circuit mass flux and grid pressure of a flow network system is based on the mass and momentum conservation equations and an iterative method is used to solve the nonlinear equations. Harbin Boiler Works has developed a 600MW supercritical CFB boiler with external heat exchangers and 6 separators. The mass flux and metal temperature distribution of water wall in the CFB boiler are calculated and the results show that the water wall can operate safely at BMCR and 75％BMCR load.
supercritical pressure CFB boiler hydraulic characteristics mass fluz distribution metal temperature
D.Yang J.Pan Q.C.Bi Y.J.Zhang X.G.Jiang L.Yu
State Key Laboratory of Multiphase Flow in Power Engineering, Xi an Jiaotong University,Xi an ,710 Harbin Boiler Co.Ltd., Harbin, 150046, China
国际会议
第20届国际流化床燃烧会议(20th International Conference on Fluidized Bed Combustion)
西安
英文
180-185
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）