US 11,913,360 B2
Method for operating a power plant in order to generate electrical energy by combustion of a carbonaceous combustible, and corresponding system for operating a power plant
Peter Moser, Cologne (DE); Georg Wiechers, Hilden (DE); Sandra Schmidt, Wuppertal (DE); and Knut Stahl, Hamm (DE)
Assigned to RWE Power Aktiengesellschaft, Essen (DE)
Appl. No. 17/278,776
Filed by RWE POWER AKTIENGESELLSCHAFT, Essen (DE)
PCT Filed Jun. 18, 2019, PCT No. PCT/EP2019/066097
§ 371(c)(1), (2) Date Mar. 23, 2021,
PCT Pub. No. WO2020/064156, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 10 2018 123 417.1 (DE), filed on Sep. 24, 2018.
Prior Publication US 2021/0363899 A1, Nov. 25, 2021
Int. Cl. F01K 23/10 (2006.01); F01K 13/00 (2006.01); F01K 25/10 (2006.01)
CPC F01K 23/10 (2013.01) [F01K 13/006 (2013.01); F01K 25/103 (2013.01); F05D 2220/76 (2013.01); F05D 2260/61 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for operating a power plant for generating electrical energy for delivery to at least one consumer by combustion of a carbonaceous combustible, carbon dioxide being separated from the flue gas of the power plant, the separated carbon dioxide being converted at least in part into a fuel, the method comprising:
combusting the fuel at least temporarily in at least one heat engine so as to form a waste gas having a thermal energy, wherein the heat engine comprises a diesel engine and/or an Otto engine;
generating electrical energy by the at least one heat engine and delivering the electrical energy to the at least one consumer, wherein at least some of the thermal energy of the waste gas formed by the at least one heat engine is used in at least one of the following processes:
a) heating a combustion air of the power plant;
b) heating a process medium of the power plant;
c) drying of the carbonaceous combustible used in the power plant; and
d) separating carbon dioxide from the flue gas of the power plant;
and
mixing the waste gas of the heat engine with the flue gas of the power plant after the at least some of the thermal energy of the waste gas is used in at least one of processes a) through d) above;
wherein carbon dioxide is separated from the mixture of the waste gas and the flue gas and converted at least in part into the fuel.