Back to results
US 6,588,197 B2Granted
Steam control apparatus for turbine
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsTomoka Tanaka, Shouichi Nagata, Kazuya Higashi, Koji Hiramoto
Life of this patent
Estimating the term…
Abstract
The temperature and flow rate of steam introduced to a gas turbine and a combustor is controlled properly through mixing intermediate-pressure steam and high-pressure steam. Thus, two different requirements, i.e., adjustment of steam temperature and securing of a sufficient steam flow rate, can be satisfied simultaneously. As a result, it becomes possible to simultaneously achieve control of the clearance of the blade ring of the gas turbine by means of steam and cooling of the combustor by means of steam.
Claims6
A steam control apparatus for a turbine, comprising:
- a waste heat recovery boiler including a high-pressure unit for generating high-pressure steam by use of exhaust gas of the gas turbine, and a low-pressure unit for generating low-pressure steam by use of exhaust gas of the gas turbine;
- a steam turbine operated by means of steam generated by the waste heat recovery boiler;
- a low-pressure-side steam introduction passage for introducing low-pressure steam from the low-pressure unit of the waste heat recovery boiler to the steam turbine;
- a high-pressure-side steam introduction passage for introducing high-pressure steam from the high-pressure unit of the waste heat recovery boiler to the steam turbine;
- a steam passage branching off the low-pressure-side steam introduction passage and serving as a bypass for introducing low-pressure steam from the low-pressure unit to a blade ring of the gas turbine and a high-temperature component;
- a high-pressure steam passage branching off the high-pressure-side steam introduction passage and merging into the steam passage on the upstream side of the blade ring of the gas turbine and the high-temperature component;
- and
- a flow-rate adjustment-control unit for adjusting the flow rate of steam flowing through the steam passage and the flow rate of steam flowing through the high-pressure steam passage to thereby adjust the flow rate and temperature of steam flowing through the blade ring of the gas turbine and the high-temperature component.
5 more elements
Dependencies are inferred from the claim text.