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1前言SHF20-2.5/400-W+炉渣型内循环流化床锅炉,带有过热器。过热器采用典型的双管圈水平悬吊式结构,分低温和高温两段,低温过热器管材为20#,高温过热器管材为15CrMoG,两级过热器中间采用面式减温器减温。该锅炉自2001年3月安装完毕,投入运行后实测过热蒸汽温度为395℃,压力≤2.5MPa。运行到2001年6月20日,低温段过热器爆管已达2次,基本上处于同一位置,如图1所示A、B处。第一次爆管发生在从左向右数第三排管子的A处,第二次是在从左向右第五排管子的B处。
1 Introduction SHF20-2.5 / 400-W + slag type internal circulating fluidized bed boiler with superheater. Superheater using a typical double-pipe horizontal suspension structure, the two sub-low temperature and high temperature, low temperature superheater pipe is 20 #, high temperature superheater pipe 15CrMoG, two surface superheater using surface desuperheater temperature. Since the boiler was installed in March 2001, the actual measured superheated steam temperature was 395 ℃ and the pressure ≤2.5MPa after it was put into operation. Run to June 20, 2001, low temperature superheater burst tube has reached 2 times, basically in the same position, as shown in Figure 1 A, B Department. The first burst occurred at the A line at the third row from left to right and the second at B at the fifth row from left to right.