锅炉引风机选型改造的可靠性分析  

Reliability analysis and countermeasures on type selection of boiler induced draft fans

作　　者：王贺岑[1] 白红涛[2] 许明峰[1] 任利明[1] 

机构地区：[1]河南电力试验研究院,河南郑州450052 [2]平顶山姚孟发电有限责任公司,河南平顶山467031

出　　处：《中国电力》2010年第1期51-55,共5页Electric Power

摘　　要：针对电厂除尘、脱硫系统改造后,锅炉引风机出现的失速问题,通过现场试验测试锅炉引风机的运行特性参数,并结合引风机的理论性能曲线分析,发现引风机实际运行的工作点接近其理论失速线,工作中出现失速问题;在引风机系统入口端加装KSE(风机性能稳定器)装置,改变其理论失速线的位置,使引风机的实际工作点远离其理论失速线,避免引风机出现失速现象。对锅炉引风机出现的失速问题进行分析探讨,提出引风机改造选型中应注意引风机失速裕度的选取问题,可为今后电厂进行类似方面的改造提供借鉴。For the retrofit of precipitation and flue gas desulfurization （ FGD ） system, stalling issue of the boiler axial-flow induced draft fan （IDF） was analyzed. By testing the running characteristic parameter of IDF at the scene, and combining with its characteristic curve , it was discovered that the actual working point of IDF nears its theory stall line, and stalling issue would appear during running. In order to make the actual working point of IDF keeping away from its theory stall line and avoid the stalling issue of IDF, KSE （the steady implement of function ） equipment was installed at the entrance of the IDF to changing the position of IDF theory stall line. The stalling issue of IDF was analyzed and probed, and the problem that the stall margin selection should be considered carefully in IDF retrofit and type selection was presented, which gives some useful suggestion for the similar retrofit in power plant.

关 键 词：电厂锅炉 引风机 失速裕度 分析 对策 

分 类 号：TK223.26[动力工程及工程热物理—动力机械及工程]