Steam Turbine Main Steam Bypass Valve Automatic Preheating Device for Thermal Power Plant

摘要

The present invention aims to contribute to the operation of economical power plants by facilitating operation by adding a thermostat to control the amount of preheated steam and preventing steam consumption (waste) other than the required amount.;The temperature of the main body of the main steam bypass pressure reducing valve 1 is detected from the temperature detector 4 connected to the downstream end of the main steam bypass bypass valve 5 to be transmitted to the automatic thermostat 5 In the automatic thermostat 5, the preheat steam valve 2 is closed when the temperature is high and the preheated steam valve 2 is opened when the temperature is low when the temperature is compared with the set temperature upper limit value and the lower limit value. And the steam preheating steam is always supplied to the downstream of the bypass pressure reducing and temperature control valve (1) for the steam power plant.