摘要
某2×1000 MW燃煤机组锅炉因局部喷氨过量和冬季空预器冷端综合温度低,导致空预器堵塞严重,空预器一次风差压、二次风差压、烟气差压增大,影响锅炉安全、稳定、经济运行。为缓解空预器堵塞现象,提出了在线升温精准处理策略,根据硫酸氢氨物理特性,计划对空预器冷端进行升温,使硫酸氢氨气化挥发,再通过空预器吹灰带走,以降低空预器阻力,使机组运行状况得到改善。工业实证数据表明,该技术精准处理策略可使空预器差压值降低22%~34%,换热效率提升17.5%,烟气侧压损恢复至设计阈值的±5%范围内,显著优化了机组运行经济性与设备可靠性。
Due to localized excessive ammonia injection and low comprehensive temperature at the cold end of the air preheater during winter,a 2×1000 MW coal-fired boiler unit experienced severe blockage of the air preheater.This resulted in increased differential pressures across the primary air,secondary air,and flue gas of the air preheater,adversely affecting the safety,stability,and economic operation of the boiler.To alleviate the blockage of the air preheater,this paper proposes an online heating precise treatment strategy.Based on the physical characteristics of ammonium bisulfate,the plan involves heating the cold end of the air preheater to vaporize and volatilize the ammonium bisulfate,which is then carried away by the soot blowing of the air preheater,thereby reducing the resistance of the air preheater and improving the operational condition of the unit.Industrial empirical data indicate that this precise treatment strategy can reduce the air preheater differential pressure by 22%~34%,enhance the heat exchange efficiency by 17.5%,and restore the flue gas side pressure loss to within±5%of the design threshold.This significantly optimizes the operational economy and equipment reliability of the unit.
作者
王国丞
WANG Guocheng(Sichuan Tianming Power Generation Co.,Ltd.,Mianyang 621000,China)
出处
《电工技术》
2025年第S1期25-27,共3页
Electric Engineering
关键词
燃煤机组
空预器堵塞
在线精准处理
硫酸氢铵
coal-fired units
air preheater blockage
online precise treatment
ammonium bisulfate
