摘要
某电厂循环流化床锅炉风帽采用中科院设计的内潜逆流柱形风帽,风帽采用耐热耐磨不锈钢精密浇注,风帽与连接管采用点焊方式固定。自投产以来,4台锅炉风帽均存在严重磨损及漏渣问题,虽然经过多次改造,漏渣情况得到一定程度缓解,但始终没有被彻底解决。为了解决上述问题,通过数值模拟与理论计算,优化了风帽结构及风帽布置方式。改造后,在锅炉一次风量160000~200000 Nm3/h,一次风温190℃的条件下,风帽阻力维持在3.5~5.5kPa,解决了流化不均、风帽磨损漏渣的问题,显著提高了锅炉运行的安全稳定性。
The hood of a circulating fl uidized bed boiler in a power plant adopts the internal submersible countercurrent cylindrical hood designed by the Chinese Academy of Sciences.The hood is precision casted with heat-resistant and wear-resistant stainless steel,and the hood and the connecting pipe are fi xed by spot welding.Since the start of production,the four boiler hoods have suffered serious wear and slag leakage.Although the slag leakage has been alleviated to a certain extent after many renovations,it has not been completely resolved.In order to solve the above problems,this paper optimizes the hood structure and hood layout through numerical simulation and theoretical calculation.After the transformation,under the condition of the primary air volume of the boiler 160000~200000Nm3/h and the primary air temperature of 190℃,the resistance of the hood is maintained at 3.5~5.5kPa,which solves the problems of uneven fluidization and wear and slag leakage of the hood,and significantly improves the boiler’s performance.Safe and stable operation performance.
出处
《电力系统装备》
2020年第19期78-79,共2页
Electric Power System Equipment
关键词
循环流化床锅炉
风帽
漏渣
磨损
circulating fl uidized bed boiler
hood
slag leakage
wear
