Species transformation method for steam turbine under high vacuum off the cylinder operation of the thermoelectric decoupling system

The present invention provides a species for steam turbine cylinder near vacuum degassing operation decoupling thermoelectric technology, and the present invention provides a system configuration and operating method of transformation, the system configuration includes a high pressure turbine, an intermediate pressure cylinder, low pressure cylinder, low pressure regulator valve cylinder contact , low-pressure cylinder inlet steam isolation valve, water ring vacuum pump, a low pressure desuperheating water cylinder valve, low-pressure cylinder in-cylinder spray desuperheater, and front vacuum valves and pipe means connecting said device. The present invention into the low-pressure cylinder by adding steam isolation valves, low pressure spray desuperheater Cylinder of transformation and transformation vacuum system, insufficient for heat problems at low loads during the heating solved, new technology thermoelectric decoupled . Heating can also be applied to low pressure cylinder unit engineered optical axis, and the non-heating period to avoid heating the cylinder of the unit to expose transducer shaft. While the application of this technology can achieve an increase in thermoelectric decoupled heat extraction capacity units, while taking into account the security, to achieve the transformation of thermoelectric decoupling small amount of steam turbines, better implementation.