Gas turbine plant with ammonia decomposition system

Patent metadata

Field	Value
Publication number	US-12428990-B2
Application number	US-202418677579-A
Country	US
Kind code	B2
Filing date	May 29, 2024
Priority date	May 30, 2023
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

The present disclosure relates to a gas turbine plant which decomposes ammonia and supplies it as fuel to a combustor of the gas turbine. The purpose of the embodiment of the present disclosure is that the gas turbine plant supplies sufficient heat to the ammonia in order to thermally decompose the ammonia effectively, and separates the residual ammonia present in the decomposition gas and supplies it to a combustor of the gas turbine.

First claim

What is claimed is:

1. A gas turbine plant with an ammonia decomposition system, the gas turbine plant comprising:
a storage tank configured to store liquid ammonia;
a supply pump configured to supply the liquid ammonia of the storage tank;
a preheater configured to preheat the liquid ammonia supplied by the supply pump;
a vaporizer configured to vaporize the liquid ammonia preheated by the preheater;
a superheater configured to superheat gaseous ammonia vaporized by the vaporizer;
a decomposition reactor configured to thermally decompose the gaseous ammonia superheated by the superheater;
an ammonia absorption tower configured to separate residual ammonia from decomposition gas decomposed in the decomposition reactor and generate synthesis gas consisting of hydrogen and nitrogen; and
an ammonia regeneration tower configured to evaporate and regenerate ammonia from ammonia water produced by dissolving the residual ammonia in water in the ammonia absorption tower,
wherein the synthesis gas generated in the ammonia absorption tower is supplied to a first combustor of a gas turbine,
wherein water discharged from the ammonia regeneration tower is branched and a portion of the water is supplied to the ammonia absorption tower, and the other portion is supplied back to the ammonia regeneration tower through a reboiler, and
wherein the water passing through the reboiler directly or indirectly exchanges heat with the decomposition gas.

2. The gas turbine plant with an ammonia decomposition system of claim 1 , wherein the gaseous ammonia regenerated in the ammonia regeneration tower is mixed with the gaseous ammonia vaporized in the vaporizer and is supplied to the superheater.

3. The gas turbine plant with an ammonia decomposition system of claim 2 , wherein the gaseous ammonia regenerated in the ammonia regeneration tower is compressed by a gas compressor before being mixed with the gaseous ammonia vaporized in the vaporizer.

4. The gas turbine plant with an ammonia decomposition system of claim 1 , further comprising a heat transfer fluid circuit through which a heat transfer fluid flows,
wherein the heat transfer fluid circuit comprises a pump, a first heat exchanger that absorbs heat by exchanging heat with the decomposition gas, and the reboiler that supplies heat by exchanging heat with water.

5. A gas turbine plant with an ammonia decomposition system, the gas turbine plant comprising:
a storage tank configured to store liquid ammonia;
a supply pump configured to supply the liquid ammonia of the storage tank;
a preheater configured to preheat the liquid ammonia supplied by the supply pump;
a vaporizer configured to vaporize the liquid ammonia preheated by the preheater;
a superheater configured to superheat gaseous ammonia vaporized by the vaporizer;
a decomposition reactor configured to thermally decompose the gaseous ammonia superheated by the superheater;
an ammonia absorption tower configured to separate residual ammonia from decomposition gas decomposed in the decomposition reactor and generate synthesis gas consisting of hydrogen and nitrogen; and
an ammonia regeneration tower configured to evaporate and regenerate ammonia from ammonia water produced by dissolving the residual ammonia in water in the ammonia absorption tower,
wherein the synthesis gas generated in the ammonia absorption tower is supplied to a first combustor of a gas turbine,
further comprising a second combustor that generates combustion gas such that heat is supplied to the decomposition reactor,
wherein water discharged from the ammonia regeneration tower is branched and a portion of the water is supplied to the ammonia absorption tower, and the other portion is supplied back to the ammonia regeneration tower through a reboiler, and
wherein the water passing through the reboiler directly or indirectly exchanges heat with the combustion gas.

6. The gas turbine plant with an ammonia decomposition system of claim 5 , further comprising a heat transfer fluid circuit through which a heat transfer fluid flows,
wherein the heat transfer fluid circuit comprises a pump, a first heat exchanger that absorbs heat by exchanging heat with the combustion gas, and the reboiler that supplies heat by exchanging heat with water.

7. The gas turbine plant with an ammonia decomposition system of claim 4 ,
wherein exhaust gas discharged from the gas turbine is supplied to a heat recovery steam generator,
wherein steam generated by heat of the exhaust gas in the heat recovery steam generator is supplied to a steam turbine and drives the steam turbine, and then flows into a condenser, and water condensed in the condenser is supplied back to the heat recovery steam generator, and
wherein a portion of the water condensed in the condenser is supplied as the heat transfer fluid to the heat transfer fluid circuit.

8. The gas turbine plant with an ammonia decomposition system of claim 7 , wherein the heat transfer fluid circuit further comprises an internal heat exchanger in which the water discharged from the condenser and the water entering the condenser exchange heat.

9. The gas turbine plant with an ammonia decomposition system of claim 8 , wherein the water discharged from the condenser absorbs heat while passing through the internal heat exchanger, absorbs heat while passing through the first heat exchanger, and then supplies the heat while passing through the reboiler, supplies heat while passing through the internal heat exchanger, and then flows back into the condenser.

10. The gas turbine plant with an ammonia decomposition system of claim 6 ,
wherein exhaust gas discharged from the gas turbine is supplied to a heat recovery steam generator,
wherein steam generated by heat of the exhaust gas in the heat recovery steam generator is supplied to a steam turbine and drives the steam turbine, and then flows into a condenser, and water condensed in the condenser is supplied back to the heat recovery steam generator, and
wherein a portion of the water condensed in the condenser is supplied as the heat transfer fluid to the heat transfer fluid circuit.

11. The gas turbine plant with an ammonia decomposition system of claim 10 , wherein the heat transfer fluid circuit further comprises an internal heat exchanger in which the water discharged from the condenser and the water entering the condenser exchange heat.

12. The gas turbine plant with an ammonia decomposition system of claim 5 ,
wherein the combustion gas supplies heat while passing through the decomposition reactor and the superheater, and
wherein the water passing through the reboiler is supplied with heat directly or indirectly from the combustion gas that has passed through the decomposition reactor and the superheater.

13. The gas turbine plant with an ammonia decomposition system of claim 1 , wherein the gaseous ammonia regenerated in the ammonia regeneration tower exchanges heat with the liquid ammonia while passing through the preheater.

14. The gas turbine plant with an ammonia decomposition system of claim 13 , further comprising a separation tank that separates the liquid ammonia condensed as the gaseous ammonia regenerated in the ammonia regeneration tower passes through the preheater from uncondensed gaseous ammonia,
wherein the liquid ammonia separated in the separation tank is recovered back to the ammonia regeneration tower, and the separated gaseous ammonia is mixed with the gaseous ammonia vaporized by the vaporizer and is supplied to the superheater.

15. The gas turbine plant with an ammonia decomposition system of claim 1 ,
wherein water discharged

Assignees

• Doosan Enerbility Co Ltd

Inventors

• Bak Byoung Gu
• Kim Jin Il
• Kim Tae Woo
• Ha Hong Geun
• Bae Young Hoon
• Seon Chil Yeong
• Lee Ki Hyun
• Jeong Kwang Hun

Classifications

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title

• B01D53/1425

  Regeneration of liquid absorbents · CPC title

• B01D2257/406

  Ammonia · CPC title

• F05D2220/62

  with energy recovery turbines · CPC title

• B01D53/1418 Primary

  Recovery of products · CPC title