US 12,031,468 B2
System and method for treating gas turbine exhaust gas
Glen L. Bostick, Columbia, IL (US); Shaun P. Hennessey, St. Charles, MO (US); Nathan Ross, Ballwin, MO (US); and Piero Scapini, Milan (IT)
Assigned to Nooter/Eriksen, Inc., Fenton, MO (US)
Filed by Nooter/Eriksen, Inc., Fenton, MO (US)
Filed on Jun. 5, 2023, as Appl. No. 18/205,959.
Application 18/205,959 is a continuation in part of application No. 17/487,887, filed on Sep. 28, 2021, granted, now 11,668,219.
Claims priority of provisional application 63/084,290, filed on Sep. 28, 2020.
Prior Publication US 2023/0332526 A1, Oct. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F01N 3/20 (2006.01); F01N 3/02 (2006.01); F01N 3/023 (2006.01); F01N 3/04 (2006.01); F01N 3/28 (2006.01); F01N 5/02 (2006.01); F28D 21/00 (2006.01); F28F 9/26 (2006.01)
CPC F01N 3/2006 (2013.01) [F01N 3/0205 (2013.01); F01N 3/02 (2013.01); F01N 3/0234 (2013.01); F01N 3/04 (2013.01); F01N 3/2889 (2013.01); F01N 5/02 (2013.01); F01N 2240/02 (2013.01); F01N 2240/10 (2013.01); F01N 2260/02 (2013.01); F01N 2260/024 (2013.01); F28D 21/0001 (2013.01); F28D 21/0003 (2013.01); F28F 9/26 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A system for treating gas turbine exhaust gas comprising:
a first heat exchanger, the first heat exchanger is adapted and configured to receive exhaust gas and cool the exhaust gas as the exhaust gas passes through the first heat exchanger;
a catalytic converter, the catalytic converter is adapted and configured to receive exhaust gas from the first heat exchanger, the catalytic converter is adapted and configured to reduce certain gas emissions from the exhaust gas received from the first heat exchanger as the exhaust gas from the first heat exchanger passes through the catalytic converter;
a second heat exchanger, the second heat exchanger is adapted and configured to receive exhaust gas from which certain emissions have been reduced from the catalytic converter, the second heat exchanger is adapted and configured to cool the exhaust gas received from the catalytic converter as the exhaust gas passes through the second heat exchanger;
a cooling loop, the cooling loop is adapted and configured to receive a flow of working fluid from the first heat exchanger and direct the flow of working fluid from the first heat exchanger to the second heat exchanger, and the cooling loop is adapted and configured to receive a flow of working fluid from the second heat exchanger and direct the flow of working fluid from the second heat exchanger to the first heat exchanger;
a district heating system, the district heating system is connected in the cooling loop and in fluid communication with the flow of working fluid directed through the cooling loop;
an exhaust gas discharge structure;
the first heat exchanger is at least partially within the exhaust gas discharge structure, and the catalytic converter and the second heat exchanger are inside the exhaust gas discharge structure; and
the district heating system is outside the exhaust gas discharge structure.
 
23. A method for treating gas turbine exhaust gas flowing through an exhaust gas discharge structure comprising:
directing a flow of exhaust gas from a gas turbine through a first heat exchanger located at least partially within the exhaust gas discharge structure and transferring heat from the flow of exhaust gas directed through the first heat exchanger to working fluid passing through the first heat exchanger;
directing the flow of exhaust gas from the first heat exchanger through a catalytic converter located within the exhaust gas discharge structure and reducing certain gas emissions from the flow of exhaust gas directed through the catalytic converter;
directing the flow of exhaust gas with certain gas emissions reduced from the catalytic converter through a second heat exchanger located within the exhaust gas discharge structure and transferring heat from the flow of exhaust gas directed through the second heat exchanger to working fluid passing through the second heat exchanger;
connecting the first heat exchanger and the second heat exchanger in a cooling loop with a district heating system, the district heating system being located outside of the exhaust gas discharge structure; and
cycling the working fluid in the cooling loop from the first heat exchanger, through the district heating system, through the second heat exchanger and to the first heat exchanger.