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《Electric Power》 2007-01
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Bed temperature control of 300 MW CFB boiler

WU Yu-ping,ZHOU Si-lin(Sichuan Baima CFB Demonstration Power Plant Co.,Ltd.,Neijiang 641005,China)  
Automatic control of the bed temperature is key to the stable and economic operation of large CFB boilers.The first 300 MW CFB boiler in Sichuan Baima Demonstration Power Plant introduced from ALSTOM,France,adopts the cone valve of external bed for bed temperature control.During the trial running of unit,based on the conditions on site,the measuring point arrangement for bed temperature was optimized,including changing the locations of middle and lower measuring points,modifying the unreasonable limited logic of PI controller,adjusting the parameters of PI controller,prolonging the oscillating period of cone valve.The application shows that the fluctuation range of bed temperature can be controlled within 50 ℃ in the light of automatic control for bed temperature,providing a good foundation for the putting into operation of CCS.
【CateGory Index】: TK32
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