Requirements for the quality of steam used for turbine steam seals
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Can saturated steam be used for the turbine steam seal?
Are you referring to the steam seal extraction pump? It’s not allowed
The steam used for the turbine seal must be superheated steam without any water content; the temperature of 1.0 MPa steam should be maintained between 220 and 320 degrees, with a typical value of around 250 degrees； If a turbine is equipped with a steam ejector, superheated steam must be used; saturated steam cannot be used ；
Ten years ago, I participated in the commissioning of a \"four-in-one\" nitric acid production unit; the steam used to drive the turbine, as well as the steam for the condenser extractors and steam seals, was saturated steam produced by the waste heat boilers themselves. (Before igniting the oxidation furnace, superheated steam supplied from outside the process area was used, but it was adjusted to saturated steam once it entered the process area through temperature and pressure reduction devices.) At that time, since I didn’t understand it, I researched a lot of information on turbines and found that saturated steam seems to be used only in \"four-in-one\" units; but at least it has been proven that it can be used in practice!
Are you referring to the steam seal extraction pump?
What was said on the 5th floor is right; doing as he said is the correct approach.
Thank you all for your advice! ! ! !
The steam seal can be operated with saturated steam; the pressure of the steam seal is controlled at around 0.1 MP. The condensate from its collector pipe is sent to the heat well. The steam extractor used for the steam seal does not require the steam to be superheated – a temperature of over 0.8 is sufficient, as long as it meets the requirements regarding vacuum level.