US 12,330,979 B2
Method for operating a fired furnace and arrangement comprising such a furnace
Martin Adendorff, Munich (DE); Marco Golbach, Munich (DE); Michael Seys, Munich (DE); Benjamin Hentschel, Munich (DE); and Maximilian Jarosch, Zorneding (DE)
Assigned to Linde GmbH, Pullach (DE)
Appl. No. 17/597,613
Filed by LINDE GMBH, Pullach (DE)
PCT Filed Jul. 8, 2020, PCT No. PCT/EP2020/025322
§ 371(c)(1), (2) Date Jan. 13, 2022,
PCT Pub. No. WO2021/008729, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 19020436 (EP), filed on Jul. 18, 2019.
Prior Publication US 2022/0348489 A1, Nov. 3, 2022
Int. Cl. F27D 17/10 (2025.01); C03B 5/237 (2006.01); C25B 1/042 (2021.01); F27D 17/13 (2025.01)
CPC C03B 5/237 (2013.01) [C25B 1/042 (2021.01); F27D 17/10 (2025.01); F27D 17/13 (2025.01)] 18 Claims
OG exemplary drawing
 
1. A method for operating a fired furnace, comprising:
heating a fired furnace using a fuel gas stream and forming a combustion product stream,
forming a steam stream using heat from at least a part of the combustion product stream,
subjecting at least a part of the steam stream to a high temperature electrolysis to form a hydrogen-containing substance stream and an oxygen-containing substance stream, and
using at least a part of the hydrogen-containing substance stream as the fuel gas stream,
wherein formation of the steam stream comprises a plurality of heat exchange steps to which the combustion product stream or a part thereof is subjected, wherein water used to form the steam stream and/or steam used to form the steam stream is heated in the heat exchange steps, and
wherein the plurality of heat exchange steps comprises a first heat exchange step in which
(a) the combustion product stream or a portion thereof is cooled from a temperature level of 1400 to 1600° C. to a temperature level of 900 to 1100° C., and in which saturated steam used to form the steam stream is superheated from a temperature level of 100 to 120° C. to a temperature level of 700 to 900° C., or
(b) the combustion product stream or a portion thereof is cooled from a temperature level of 1400 to 1600° C. to a temperature level of 600 to 700° C., and in which water used to form the steam stream is evaporated to form saturated steam.