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《Power Engineering》 1999-01
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Discussion on the Practical Technology for Reheat Steam Temperature Adjustment in Domestic Utility Boilers

Li Dao lin(Shanghai,Shanghai Power Equipment Research Institute).  
Abstract In our country all utility units with the capacity larger than 125MW are equipped with reheat boilers exclusively.The important means for enhancing their operation economy are solving the problem of reheat steam temperature adjustment (RSTA) and control.In this paper the development of reheat steam temperature adjusting devices used in domestic utility boilers is recalled firstly,then the linkage of steam temperature and the exhausting condition of steam turbine as well as the influence on pendant tube safety during adjustment are discussed.The situation,which showing quite higher emergency water spray in reheat system in many large utility boilers is unacceptable,should be corrected effectively.The test on a 300MW controlled circulation boiler for RSTA by titable burners is more detailed mentioned,meanwhile the phenomena called“temperature abnormal variation”and it's reason are analyzed basically.Some requirements on automatic control circuit configuration for RSTA are also reviewed.
【CateGory Index】: TM621.2
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