Gas turbine plant with ammonia decomposition system

Patent metadata

Field	Value
Publication number	US-12553387-B2
Application number	US-202418677659-A
Country	US
Kind code	B2
Filing date	May 29, 2024
Priority date	May 30, 2023
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

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 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 first superheater configured to superheat gaseous ammonia vaporized by the vaporizer; a decomposition reactor configured to thermally decompose the gaseous ammonia superheated by the first superheater; a separator configured to separate residual ammonia from the decomposition gas decomposed by the decomposition reactor; and a first combustor configured to generate combustion gas in such a way as to supply heat to the decomposition reactor, wherein synthesis gas consisting of hydrogen and nitrogen with the residual ammonia removed by the separator is supplied to a second combustor of a gas turbine, wherein exhaust gas discharged from the gas turbine is supplied to a heat recovery steam generator, wherein the first combustor is placed outside the heat recovery steam generator, and wherein the combustion gas supplies heat while passing directly through the decomposition reactor and the first superheater.

2 . The gas turbine plant with the ammonia decomposition system of claim 1 , wherein the residual ammonia separated by the separator is mixed with the gaseous ammonia vaporized by the vaporizer and is supplied to the first superheater.

3 . The gas turbine plant with the ammonia decomposition system of claim 1 , wherein a portion of the decomposition gas decomposed by the decomposition reactor, a portion of the synthesis gas from which residual ammonia has been removed in the separator, a portion of the liquid ammonia preheated in the preheater, or a portion of the gaseous ammonia superheated by the first superheater is supplied to the first combustor and combusted.

4 . The gas turbine plant with the ammonia decomposition system of claim 1 , wherein a portion of exhaust gas discharged from the gas turbine is supplied to the first combustor.

5 . The gas turbine plant with the ammonia decomposition system of claim 1 , wherein the decomposition gas is supplied to the separator after supplying heat through at least one of the preheater, the vaporizer, and the first superheater from the decomposition reactor.

6 . The gas turbine plant with the ammonia decomposition system of claim 1 , further comprising a second superheater that pre-superheats the gaseous ammonia before the gaseous ammonia vaporized in the vaporizer is supplied to the first superheater,
wherein the decomposition gas is supplied to the separator after supplying heat through the second superheater from the decomposition reactor.

7 . The gas turbine plant with the ammonia decomposition system of claim 1 , further comprising a gas compressor that compresses the decomposition gas or the synthesis gas.

8 . The gas turbine plant with the ammonia decomposition system of claim 1 ,
wherein the combustion gas that has passed through the decomposition reactor and the first superheater is supplied together with the exhaust gas to the heat recovery steam generator.

9 . The gas turbine plant with the ammonia decomposition system of claim 1 , wherein air supplied to a compressor of the gas turbine supplies heat while passing through the preheater before being supplied to the compressor.

10 . The gas turbine plant with the ammonia decomposition system of claim 1 , wherein a heat transfer fluid absorbs heat from air supplied to a compressor of the gas turbine and supplies the heat to the liquid ammonia in the preheater.

11 . The gas turbine plant with the ammonia decomposition system of claim 1 ,
wherein the exhaust gas discharged from the gas turbine or the combustion gas generated in the first combustor passes through a selective catalytic reduction device, and wherein at least one of a portion of the gaseous ammonia vaporized by the vaporizer and a portion of the gaseous ammonia superheated by the first superheater is supplied as a reducing agent to the selective catalytic reduction device.

12 . The gas turbine plant with the ammonia decomposition system of claim 10 ,
wherein the exhaust gas discharged from the gas turbine or the combustion gas generated in the first combustor passes through a selective catalytic reduction device, wherein the heat transfer fluid supplies heat to the ammonia which is supplied as a reducing agent from the storage tank to the selective catalytic reduction device, and wherein the gaseous ammonia vaporized by being supplied with heat by the heat transfer fluid is supplied together with a portion of the gaseous ammonia superheated by the first superheater to the selective catalytic reduction device.

13 . The gas turbine plant with the ammonia decomposition system of claim 1 ,
wherein the exhaust gas discharged from the gas turbine or the combustion gas generated in the first combustor passes through a selective catalytic reduction device, and wherein a portion of the exhaust gas or a portion of the combustion gas is branched before flowing into the selective catalytic reduction device, and supplies heat the ammonia supplied as a reducing agent to the selective catalytic reduction device.

14 . The gas turbine plant with the ammonia decomposition system of claim 1 , further comprising a fuel heater that heats the fuel supplied to the first combustor or the synthesis gas supplied to the second combustor,
and wherein the combustion gas or water or steam heated by heat of the exhaust gas in the heat recovery steam generator is supplied as a heat source to the fuel heater.

15 . The gas turbine plant with the ammonia decomposition system of claim 1 ,
and wherein steam generated by heat of the exhaust gas in the heat recovery steam generator is supplied to a steam turbine, drives the steam turbine, and then flows into a condenser, and water condensed in the condenser exchanges heat with the combustion gas, and then is supplied back to the heat recovery steam generator.

16 . The gas turbine plant with the ammonia decomposition system of claim 1 ,
and wherein water or steam heated by heat of the exhaust gas in the heat recovery steam generator supplies heat while passing through at least one of the preheater, the vaporizer, and the first superheater, and then returns back to the heat recovery steam generator.

17 . The gas turbine plant with the ammonia decomposition system of claim 1 , further comprising a second superheater that pre-superheats the gaseous ammonia before the gaseous ammonia vaporized in the vaporizer is supplied to the first superheater,
and wherein water or steam heated by heat of the exhaust gas in the heat recovery steam generator supplies heat while passing through the second superheater, and then returns back to the heat recovery steam generator.

18 . The gas turbine plant with the ammonia decomposition system of claim 1 ,
wherein natural gas is further supplied to the second combustor, wherein the gas turbine plant further comprises: a natural gas heater that heats the natural gas supplied to the second combustor; and a fuel heater that heats the synthesis gas supplied to the second combustor, and wherein a temperature of the synthesis gas heated in the fuel heater is lower than a temperature of the natural gas heated in the natural gas heater.

19 . A gas turbine pla

Assignees

• Doosan Enerbility Co Ltd

Inventors

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

Classifications

• F02C6/18

  using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants (using waste heat as source of energy for refrigeration plants F25B27/02; using the waste heat of a gasturbine for steam generation or in a steam cycle see F01K23/10) · CPC title

• F02G5/04

  in combination with other waste heat from combustion engines · CPC title

• F05D2260/20

  Heat transfer, e.g. cooling · CPC title

• F05D2210/12

  gaseous, i.e. compressible · CPC title

• C01B2203/0277

  containing a catalytic decomposition step · CPC title