摘要
通过对某电厂300 MW循环流化床锅炉进行冷态动力场试验后发现,左右两侧人孔门附近流化效果极差,一次风量达到280 m^3/h左右时,两侧位置才能达到临界流化状态,与设计值偏差较大,严重影响一次风入口布置在左右两侧的锅炉安全运行。通过调节不同位置风帽的小孔个数,调节压力分布,借助流化均匀性试验界定高压区及低压区,确定改造范围。通过理论分析,在不改动一次风入口前提下,通过技术手段增加风室中部风帽阻力,逐步实现风室两侧与中部风压均匀分布,解决了风室两侧死床、结焦等问题,提高了锅炉效率。
Through the cold dynamic field test on a 300-MW circulating fluidized bed boiler （CFBB）, it is discovered that the fluidization around the left and the right manhole doors is extremely poor. When the primary air volume reaches as much as about 280 m3/h, the both sides might reach the critical fluidization state, which is very different fi＇om the designed values and affects the safe operation of the boilers with this kind of primary air inlets. Based on the adjustment on the hood holes and the pressure distribution and by virtue of the fluidization uniformity test to determine the high and the low pressure areas, the modification area is fixed. With the help of the theoretical analysis, the resistances of the hoods in the middle of the air chamber are increased by technical means without any changes in the primary air inlets. Therefore, the even air distribution is gradually realized on both sides and in the middle of the air chamber, thus solving the problems such as inadequate fluidization and coking at both sides of the air chamber and improving the boiler efficiency.
出处
《中国电力》
CSCD
北大核心
2016年第5期97-101,共5页
Electric Power
关键词
循环流化床锅炉
风室
流场
风压
CFBB
air inlet chamber
flow field
air pressure
