Patent ID: 8881761
Filing Date: 2014-11-11
Classification: F16K,F22B,Y10T

Abstract:
1. A steam supply system wherein: a steam supply passage incorporates a pressure reducing valve and the passage further incorporates a steam ejector downstream of the pressure reducing valve; a gas-liquid separator fluidly coupled with and physically connected to the pressure reducing valve; a suction portion of the steam ejector is connected to a re-evaporation tank for re-evaporating steam condensate via a suction passage; passage steam of the pressure reducing valve is used as a driving steam for the steam ejector; re-evaporated steam within the re-evaporation tank is suctioned by the steam ejector to be mixed with the passage steam: the suction passage incorporates a check valve for preventing reverse flow of steam to the re-evaporation tank; the valve opening ratio of the pressure reducing valve is adjusted in accordance with the temperature or pressure of steam on the downstream side of the steam ejector; the check valve has an inherent flow characteristics that an increase ratio of a flow rate associated with increase of its valve opening ratio is equivalent between a small opening ratio range with small valve opening ratios and a large opening ratio range with large valve opening ratios or an inherent flow characteristics that the increase ratio is smaller in the small opening ratio range than in the large opening ratio range; and the check valve further includes an urging means for providing an urging force for urging a valve body to a valve closing side.