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1 前言 70年代以来,循环流化床技术在固体燃料清洁燃烧领域获得了广泛的应用。与常规煤粉炉相比,其优势在于燃料适应性广,环保效果好,燃烧效率高,以及负荷调节快等。杭州某热电厂采用的两台循环流化床锅炉,型号为NG-75/3.82-M2,额定蒸发量为75t/h,额定蒸汽压力为3.82MPa,额定蒸汽温度为450℃,锅筒工作压力为4.22MPa,给水温度为150℃。Ⅱ型布置,前部为流化床炉室,在中间大斜度的水平烟道中依次布置高温和低温过热器,
1 Introduction Since the 1970s, circulating fluidized bed technology has been widely used in the field of solid fuel clean combustion. Compared with the conventional pulverized coal furnace, its advantages are wide adaptability of fuel, good environmental protection, high combustion efficiency, and fast load regulation. Two circulating fluidized bed boilers used in a thermal power plant in Hangzhou are model NG-75 / 3.82-M2 with a rated evaporation of 75 t / h, a rated steam pressure of 3.82 MPa and a rated steam temperature of 450 ° C. The working pressure of the drum is 4.22MPa, water temperature is 150 ℃. Ⅱ-type layout, the front of the fluidized bed furnace room, in the middle of the level of high-level flue stack successively arranged high temperature and low temperature superheater,