【摘要】 中国科学院力学研究所开发成功的燃气脉冲除灰技术,采用一种高能量、脉冲式、干法除灰的新思路,从根本上克服了蒸汽和压缩空气吹灰的弱点。通过对可燃气体非稳态燃烧机制的研究,分析管道结构对火焰速度和冲击波压力的影响。本技术在深圳妈湾发电总厂的运行结果表明,与蒸汽吹灰相比,可使锅炉排烟温度下降10～15℃,空气预热器烟气阻力下降700～800Pa,引风机电流平均降低20A,提高了机组运行热效率、安全性和运行稳定性。更多还原

【Abstract】 The combustion gas-pulse ash-cleaning technology developed by the Institute of Mechanics,Chinese Academy of Science,is a new type device for cleaning fouled heating surfaces in utility boilers,featuring high energy pulse and dry cleaning.It overcomes the fundamental weakness of the steam jet and compressed air ashcleaning.In the paper,the unsteady combustion mechanism of combustiblegasisdiscussed,anddependenceofimpactwaveoverpressureandflamespeedonconfigurationoftubeisanalyzed.TheoperationresultsofthetechnologyinShenzhenMawanGeneralPowerPlantindicatethat,comparedwithsteamjetashcleaning,itcanreduceboilerflue(exhaust)gastemperatureby10～15℃,cutdowngasflowresistanceby700～800Painairpreheater,andreducetheelectriccurrentofinduceddraftfanby20Aontheaverage.Theapplicationofthistechnologyinpowerplantstodatehasenhancedtheefficiency,safetyandstabilityofgeneratingsetsoperation,andproducedremarkablesocialandeconomicalbenefits.更多还原