Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Hideaki Shimada

Takayuki Nagashima

Norihide Egami

Keiichi Nakamura

Masao Itoh

Yuichi Morisawa

Hiroki Kasuya

Tomomi Okuyama

Ryu Hirayama

Kojiro Tada

A combined cycle power generation facility of an embodiment includes a first heat recovery steam generator including a high-pressure steam generation part using an exhaust gas of a gas turbine and a reheat part; a high-pressure turbine to which steam is introduced from the high-pressure steam generation part; a combustor which combusts hydrogen and oxygen; a reheat steam pipe connecting the high-pressure turbine and the combustor with the reheat part interposed therebetween; an oxygen-hydrogen combustion turbine to which steam is introduced from the combustor; a second heat recovery steam generator including a steam generation part using an exhaust gas of the oxygen-hydrogen combustion turbine; a low-pressure turbine to which steam is introduced from the steam generation part; and a condenser which steam is introduced from the low-pressure turbine.

Combined cycle power generation facility

According to the embodiment of the present invention, there are provided a first stage auxiliary burner configured to heat up the exhaust gas in the upstream side of the superheater, a second stage auxiliary burner configured to heat up the exhaust gas in the upstream side of the evaporator, a fuel supply system configured to distribute fuel so as to be supplied to the first stage auxiliary burner and the second stage auxiliary burner. Distribution of fuel charged to each of the first stage auxiliary burner and the second stage auxiliary burner is controlled in accordance with a predetermined distribution ratio of each charging quantity to whole charging quantity in all the range thereof.

Heat recovery steam generator and power plant

An auxiliary burner configured to heat exhaust gas on an upstream side of any one of heat exchangers, and a fuel supply system configured to supply fuel to the auxiliary burner. To avoid damage of a heat-transfer pipe by exhaust gas of high temperature, a reference value on which the restriction on the charging quantity to be supplied to the auxiliary burner is based is set, and the charging quantity of fuel to the auxiliary burner is restricted so as not to exceed a limit defined by the reference value.

A heat recovery steam generator has a plurality of heat exchangers, including superheaters, an evaporatorand an economizer, disposed in a ductalong the flow direction of an exhaust gasfrom a gas turbine, and generates steam by utilizing the exhaust gasfrom the gas turbine. The heat recovery steam generator includes: auxiliary combustors, each disposed upstream of one of the heat exchangers, for heating the exhaust gas by means of burners; and an air supply device for supplying air to the burners of the auxiliary combustorfrom the outside of the duct.

An exhaust heat recovery boiler in which an exhaust gas discharged from a gas turbine into a boiler duct to recover a heat of the exhaust gas and ammonia is injected to and mixed with the exhaust gas to reduce nitrogen oxide contained in the exhaust gas, the exhaust heat recovery boiler comprising: a boiler duct of a horizontal installation type having an inner hollow portion along which an exhaust gas flows from an upstream side to a downstream side; a superheater; an evaporator; a denitration reactor; and an economizer, which are disposed inside the boiler duct in this order from the upstream side to the downstream side of the exhaust gas flow therein. A drum is disposed outside the boiler duct and connected to the evaporator and a downcomer pipe extending from the drum into the boiler duct. An ammonia injection unit is disposed inside the boiler duct for injecting ammonia, and the ammonia injection unit is disposed upstream side of the evaporator closely to the downcomer pipe unit on either one of upstream side and downstream side of the downcomer pipe unit.

Growing community of inventors

Yokohama, Japan

Hideaki Shimada