Working principle of condensing steam turbine
It is mainly composed of a steam turbine body, a condensate pump, a condenser and a circulating water pump. It means that steam enters the condenser after being worked in the steam turbine and is cooled by the gas into water, and then sent back to the boiler through the condensate pump. Among them, the condenser plays a vital role. Its main purpose is to improve the thermal efficiency of the steam turbine. This is a process of re-cooling into water by steam, and its volume is greatly reduced, leaving the remaining space. It becomes a vacuum and increases the ideal enthalpy of steam.
The function of the aspirator is to establish the necessary vacuum for the steam turbine and the condenser before the turbine is started. In the operation of the condensing steam turbine, the air and other non-condensable gases are continuously extracted from the condensing equipment in time to ensure condensation. The heat exchange efficiency of the steam heat exchange tube maintains the vacuum. The performance of the vacuum pumping equipment directly determines the exhaust steam pressure of the condensing steam turbine, which affects the size of the unit's enthalpy and the amount of steam consumption. Different vacuuming methods will affect the equipment investment cost of the steam turbine unit. The operation mode is simple and the complexity of the system, so the vacuuming equipment is very important for the condensing steam turbine.