Start-up method of steam turbine plant and condenser employed fo

Details Start-up method of steam turbine plant and condenser employed fo Start-up method of steam turbine plant and condenser employed fo

1991-03-21

1992-03-17

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Process of power production or system operation

60692, F01K 1302

Patent

active

050957066

ABSTRACT:
A start-up method of a steam turbine plant including a condenser is disclosed. The condenser includes a tube bundle composed of a number of pipes for condensing an exhaust steam from a steam turbine and a hot well for receiving and storing a condensate therein. The interior of the condenser is airtightly divided into two spaces with a partition therebetween, one of them being an upper space containing the tube bundle and the other one being a lower space containing the hot well. A communication passageway(s) extends between the upper space and the lower space with an isolation valve in the form of a butterfly valve disposed on the communication passageway. At the shut-down of the steam turbine plant, the isolation valve is closed to isolate the upper space from the lower space while the lower space is maintained in vacuum. At the start-up of the steam turbine plant, the isolation valve is opened after the upper space is evacuated, and the upper space is then communicated with the lower space which is maintained still in vacuum.

REFERENCES:
patent: 4353213 (1982-10-01), Masuda et al.
patent: 4631925 (1986-12-01), Ohtake et al.

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