Steam cooled type combined cycle power generation plant and operation method thereof
First Claim
Patent Images
1. A method of operating a power generation plant, comprising:
- supplying steam to a steam turbine unit such that an exhaust steam is expelled from the steam turbine unit;
operating a stabilizing burner at an upstream position in a waste heat recovery boiler during at least one of a start-up period of operation of the power generation plant so as to create steam when an operation of the power generation plant is started and a speed-increasing period of operation of the power generation plant so as to created steam when a speed of the power generation plant is increased;
generating steam in the waste heat recovery boiler, said steam generation including using waste heat from a gas turbine having a high temperature portion with a cooling component; and
cooling the high temperature portion of the gas turbine by channeling at least one of a portion of the exhaust steam from the steam turbine unit and a portion of the steam generated in the waste heat boiler through the cooling component of the high temperature portion of the gas turbine.
2 Assignments
0 Petitions
Accused Products
Abstract
A combined cycle power generation plant comprises a waste heat recovery boiler (20) having a stabilizing burner (25) at an upstream position thereof The stabilizing burner is ignited during the time of start-up and speed increase of a gas turbine (11) so that steam generation at the waste heat recovery boiler is accelerated. The steam is used effectively for cooling the gas turbine, driving a steam turbine, and for gland steam. In addition, exhaust steam from the steam turbine is also used to cool the gas turbine. Consequently, the time for the plant to reach a full load can be shortened.
19 Citations
6 Claims
-
1. A method of operating a power generation plant, comprising:
-
supplying steam to a steam turbine unit such that an exhaust steam is expelled from the steam turbine unit;
operating a stabilizing burner at an upstream position in a waste heat recovery boiler during at least one of a start-up period of operation of the power generation plant so as to create steam when an operation of the power generation plant is started and a speed-increasing period of operation of the power generation plant so as to created steam when a speed of the power generation plant is increased;
generating steam in the waste heat recovery boiler, said steam generation including using waste heat from a gas turbine having a high temperature portion with a cooling component; and
cooling the high temperature portion of the gas turbine by channeling at least one of a portion of the exhaust steam from the steam turbine unit and a portion of the steam generated in the waste heat boiler through the cooling component of the high temperature portion of the gas turbine. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification