US 9,810,094 B2
Steam turbine forced air cooling system, equipment, and steam turbine equipped with it
Genki Kashima, Yokohama (JP); Toyohiko Masuda, Yokohama (JP); Tetsuya Hinuma, Yokohama (JP); Isao Sagawa, Yokohama (JP); Yoshitaka Narimatsu, Yokohama (JP); Hotaka Kobayashi, Yokohama (JP); Goingwon Lee, Yokohama (JP); and Kenji Sasaki, Yokohama (JP)
Assigned to Mitsubishi Hitachi Power Systems, Ltd., Yokohama (JP)
Filed by Mitsubishi Hitachi Power Systems, Ltd., Yokohama, Kanagawa (JP)
Filed on Nov. 5, 2014, as Appl. No. 14/533,537.
Claims priority of application No. 2013-230192 (JP), filed on Nov. 6, 2013.
Prior Publication US 2015/0125260 A1, May 7, 2015
Int. Cl. F01D 25/12 (2006.01); F01K 5/02 (2006.01); F01D 21/00 (2006.01); F01D 25/24 (2006.01); F02C 7/12 (2006.01)
CPC F01D 25/12 (2013.01) [F01D 21/00 (2013.01); F01D 25/24 (2013.01); F01K 5/02 (2013.01); F02C 7/12 (2013.01); F05D 2220/31 (2013.01); F05D 2260/232 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A steam turbine forced air cooling system for forcibly cooling a steam turbine after shutdown of the steam turbine, comprising:
a first branch pipe branched off from a pipe on a steam inlet side configured to supply steam to the steam turbine;
a non-steam-driven ejector disposed on the branch pipe; and
a stop valve disposed in the branch pipe at a position closer to the pipe on the steam inlet side than to the non-steam-driven ejector, wherein
the non-steam-driven ejector is installed separately from an existing vacuum pump or a steam-driven ejector,
the existing vacuum pump or the steam-driven ejector is configured to produce a vacuum in a condenser,
the first branch pipe does not connect the existing vacuum pump or the steam-driven ejector, and
the non-steam-driven ejector releases an exhaust air to an atmosphere through the first branch pipe without passing through the existing vacuum pump or the steam-driven ejector.