Huadian Technology ›› 2017, Vol. 39 ›› Issue (3): 39-41.

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Linear optimal transformation of internal leakage treatment and regulation for reheater  attempering water control valves of 1000MW unit

  

  1. Huadian Laizhou Power Generation Company Limited, Laizhou 261441, China
  • Published:2017-03-25

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Abstract:

Based on the problem of a power plant’s No.1 and No.2 boiler reheater attemperating water control valve leakage at zero opening, this paper introduced the improvement plant that changed the control valve core to triple seal structure, change the throttle sleeve to triple stage control structure, and change the valve control cure to equal percentage characteristic. After this improvement, the leakage at zero opening was eliminated. Valve flow control linearity is fine. This could be referred by similar control valve improvement project.

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