Recuperative heat exchanger system

Patent metadata

Field	Value
Publication number	US-11719141-B2
Application number	US-202117321247-A
Country	US
Kind code	B2
Filing date	May 14, 2021
Priority date	Jun 29, 2020
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

A system may include a turbine and a recuperative heat exchanger system. The recuperative heat exchanger system is configured to receive exhaust gases from the turbine. The recuperative heat exchanger system may include a precool section to cool the exhaust gases, a major heating section to receive the cooled the exhaust gases, and a minor heating section to receive the cooled the exhaust gases.

First claim

What is claimed:

1. A recuperative heat exchanger system, comprising:
a precool section within a first rigid framework, wherein the precool section comprises one or more heat exchangers configured to receive and cool an exhaust gas;
a minor section within a third rigid framework, wherein the minor section comprises a first minor heat exchanger and a second minor heat exchanger;
a first major section within a second rigid framework, wherein the first major section comprises a first major heat exchanger, a second major heat exchanger, and a third major heat exchanger;
a manifold configured to split the cooled exhaust gas from the precool section between a minor stream and a major stream, wherein the minor stream is provided to the minor section and the major stream is provided to the first major section; and
one or more valves configured to balance the split of the cooled exhaust gas to the first major section and the minor section,
wherein the minor section heat exchangers are configured to exchange heat between the minor stream and an oxidant stream,
wherein the major section heat exchangers are configured to exchange heat between the major stream and a recycled CO2 stream, and
wherein the oxidant stream is provided to the precool section after the minor section.

2. The recuperative heat exchanger system of claim 1 , wherein the manifold is positioned in a space between the first rigid framework and the second rigid framework and the third rigid framework.

3. The recuperative heat exchanger system of claim 1 , further comprising a second major section within a fourth rigid framework, wherein the second major section comprises a fourth major heat exchanger, a fifth major heat exchanger, and a sixth major heat exchange.

4. The recuperative heat exchanger system of claim 3 , further comprising a heat recovery section connected to the first major section and the second major section.

5. The recuperative heat exchanger system of claim 3 , wherein each of the first rigid framework, the second rigid framework, the third rigid framework, and the fourth rigid framework are formed by a plurality of vertically oriented structural members and a plurality of horizontally oriented structural members interconnected together.

6. The recuperative heat exchanger of claim 1 , wherein the one or more precoolers are each shell and tube heat exchangers.

7. The recuperative heat exchanger system of claim 1 , further comprising a first recycled CO2 manifold configured to receive the recycled CO2 as it enters the recuperative heat exchanger system.

8. The recuperative heat exchanger system of claim 7 , further comprising a second recycled CO2 manifold configured to receive the recycled CO2 before it exits the recuperative heat exchanger system.

9. The recuperative heat exchanger system of claim 6 , wherein the one or more shell and tube heat exchangers comprise oxidant inlets on a tube-side and configured to receive the oxidant stream from the minor section.

10. A method of using a recuperative heat exchanger system according to claim 1 , the method comprising:
cooling the exhaust gas with the precool section;
splitting the cooled exhaust gas between a minor stream and a major stream;
flowing the minor stream through the heat exchangers of the minor section;
flowing the major stream through the heat exchangers of the major section;
flowing the oxidant stream through the heat exchangers of the minor section, thereby exchanging heat between the minor stream and the oxidant stream;
flowing the recycled CO2 stream through the heat exchangers of the major section, thereby exchanging heat between the recycled CO2 stream and the major stream; and
flowing the oxidant stream from the minor section to the precool section.

11. The method of claim 10 , further comprising operating the first minor heat exchanger at a higher temperature than the second minor heat exchanger.

12. The method of claim 10 , further comprising operating the first major heat exchanger of the first major section at a higher temperature than the second major heat exchanger of the first major section, and operating the second major heat exchanger of the first major section at a higher temperature than third major heat exchanger of the first major section.

13. The method of claim 10 , further comprising operating a first major heat exchanger of a second major section at a higher temperature than a second major heat exchanger of the second major section, and operating the second major heat exchanger of the second major section at a higher temperature than a third major heat exchanger of the second major section.

14. The method of claim 10 , further comprising distributing the recycled CO2 to the first major section via a first recycled CO2 manifold.

15. The method of claim 14 , further comprising heating the recycled CO2 with the first major section and exiting the heated recycled CO2 with a second recycled CO2 manifold.

16. The method of claim 10 , further comprising providing the oxidant to the precool section via an oxidant manifold.

17. The method of claim 10 , further comprising providing heat to the first major section and the second major section via a heat recovery section.

Assignees

• Lummus Technology Inc

Inventors

• Jibb Richard John
• Guymon David
• Herbanek Ron
• Brignone Vincenzo Marco
• Groppi Roberto

Classifications

• F01N3/0205 Primary

  using heat exchangers · CPC title

• F01N5/02

  the devices using heat · CPC title

• F28D1/0408

  Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids (F28F9/0234 takes precedence) · CPC title

• F28D21/001

  for thermal power plants or industrial processes · CPC title

• F24F2221/54

  Heating and cooling, simultaneously or alternatively · CPC title