US 11,795,843 B2
Gas turbine plant
Atsushi Tsutsumi, Yokohama (JP); Tetsuya Tanaka, Yokohama (JP); Naoyuki Nagafuchi, Yokohama (JP); and Takashi Kamijo, Yokohama (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP); and MITSUBSHI HEAVY INDUSTRIES ENGINEERING, LTD., Kanagawa (JP)
Appl. No. 17/628,414
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP); and Mitsubishi Heavy Industries Engineering, Ltd., Kanagawa (JP)
PCT Filed Jul. 22, 2020, PCT No. PCT/JP2020/028515
§ 371(c)(1), (2) Date Jan. 19, 2022,
PCT Pub. No. WO2021/015260, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 2019-136180 (JP), filed on Jul. 24, 2019.
Prior Publication US 2022/0228515 A1, Jul. 21, 2022
Int. Cl. F01K 23/10 (2006.01); B01D 53/62 (2006.01); F02C 3/34 (2006.01)
CPC F01K 23/103 (2013.01) [B01D 53/62 (2013.01); F02C 3/34 (2013.01); B01D 2252/204 (2013.01); B01D 2257/504 (2013.01); B01D 2258/0283 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A gas turbine plant comprising:
a gas turbine that is configured to be driven by means of combustion gas generated due to combustion of fuel;
an exhaust line that is configured to guide exhaust gas discharged from the gas turbine to the outside;
an exhaust heat recovery boiler that is provided in the exhaust line, is configured to generate steam due to heat of the exhaust gas discharged from the gas turbine, and guide the exhaust gas which has passed through an inside of the exhaust heat recovery boiler to the exhaust line;
a carbon dioxide recovery device that is provided on a downstream side of the exhaust heat recovery boiler in the exhaust line and is configured to recover carbon dioxide contained in the exhaust gas flowing in the exhaust line;
a heat exchanger that is provided between the exhaust heat recovery boiler and the carbon dioxide recovery device in the exhaust line and is configured to cool the exhaust gas to a temperature set in advance;
a circulation line that branches from a position between the carbon dioxide recovery device and the heat exchanger in the exhaust line and is connected to an inlet of the gas turbine;
an outlet temperature measurement part that is configured to measure an exit temperature of the heat exchanger;
a supplementary combustion burner that is configured to heat the exhaust gas flowing into the exhaust heat recovery boiler; and
a control device that is configured to change an output of the supplementary combustion burner on the basis of the exit temperature,
wherein the carbon dioxide recovery device has an absorption tower which is configured to absorb carbon dioxide contained in the exhaust gas by causing the exhaust gas at the temperature set in advance and an absorption liquid to come into contact with each other, and
wherein the heat exchanger is formed of a material having a higher corrosion resistance than a material forming the exhaust heat recovery boiler.