700℃超超临界循环流化床锅炉方案设计研究

Plan Design and Research of 700 ℃ Ultra-supercritical Circulating Fluidized Bed Boiler

在总结国内330 MW和600 MW循环流化床(circulating fluidized bed boiler,CFB)锅炉开发研制及工程经验基础上,进行了蒸汽温度为700℃的350 MW超超临界CFB锅炉方案设计,并对工质流程及关键部件结构进行分析计算和设计研究。具有先进蒸汽参数的350 MW超超临界CFB锅炉采用H型整体布置,4个蒸汽包覆式旋风分离器布置在炉膛两侧,配有相应的紧凑型气动均流换热床。锅炉水冷壁为低质量流速垂直管圈结构。双回路给煤系统可保证均匀可靠地向炉内送入燃料。

Based on research and manufacture and engineering application experience of 330 MW and 600 MW circulating fluidized bed （CFB） boiler, the plan design of 350MW Ultra-supercritical CFB boiler with 700 ℃ steam parameters was performed, the water-steam process and key components of advanced Ultra-supercritical （AUSC） 350MW CFB boiler were also analytical calculated and designed. The AUSC 350MW CFB boiler adopted H-shaped configuration with four steam-coated cyclones placed on both sides of the furnace. The cyclone is connected to a compact pneumatic uniform-flow heat exchangers through a stand pipe. The membrane water walls of the boiler are vertical tube panels with low-mass flow rate, and two loops feeding coal system can assure the fuel be supply into furnace reliably and uniformly.