CN-122014411-A - Gas turbine adds compound circulation power generation system of mixed ammonia of steam

CN122014411ACN 122014411 ACN122014411 ACN 122014411ACN-122014411-A

Abstract

The invention provides a gas turbine and water vapor mixed ammonia composite cycle power generation system, which integrates a liquid ammonia storage tank, a booster pump, a liquid ammonia gasifier, an ammonia cracker, a sea water desalination device, a booster pump, a water evaporator, a water vapor superheater, an expander and a gas turbine into an integrated cycle, wherein liquid ammonia is discharged from the liquid ammonia storage tank and the pump unit and sequentially passes through the liquid ammonia gasifier unit and the ammonia cracker unit to be converted into mixed gas of ammonia, hydrogen and nitrogen, the mixed gas of ammonia, hydrogen and nitrogen is mixed with superheated steam, and then enters a combustion chamber of the gas turbine to be mixed with air for combustion after being expanded and acted by an expander power generation unit.

Inventors

YING YULONG
ZHANG HUA
TENG FEI

Assignees

上海乃若诗动力技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260402

Claims (3)

1. A gas turbine and water vapor mixed ammonia composite cycle power generation system is characterized in that a liquid ammonia storage tank, a booster pump, a liquid ammonia gasifier, an ammonia cracker, a sea water desalination device, a booster pump, a water evaporator, a water vapor superheater, an expander and a gas turbine are integrated into an integrated cycle, and the system comprises a liquid ammonia storage tank, a pump unit, a liquid ammonia gasifier unit, an ammonia cracker unit, a sea water desalination device, a pump unit, a water evaporator unit, a water vapor superheater unit, an expander power generation unit and a gas turbine power generation unit; The turbine exhaust gas of the gas turbine is split into two streams of flue gas, one stream of flue gas passes through the ammonia cracker unit, the other stream of flue gas passes through the steam superheater unit, and then the two streams of flue gas are mixed and then sequentially pass through the liquid ammonia gasifier unit and the water evaporator unit for heat exchange and cooling, and then enter an exhaust system; Liquid ammonia is discharged from the liquid ammonia storage tank and the pump unit and then sequentially passes through the liquid ammonia gasifier unit and the ammonia cracker unit to be converted into mixed gas of ammonia, hydrogen and nitrogen; the water is converted into superheated steam after passing through a water evaporator unit and a steam superheater unit after passing through a sea water desalting device and a pump unit; the mixed gas of ammonia, hydrogen and nitrogen is mixed with superheated steam, and then enters a combustion chamber of a gas turbine for mixed combustion with air after being expanded and acted by a power generation unit of an expander; Air enters a gas turbine compressor for compression after passing through an air inlet filtering system, then enters a gas turbine combustion chamber for mixed combustion with mixed gas of ammonia, hydrogen, nitrogen and steam, and then enters a gas turbine for turbine expansion work; The power generated by the whole system is the sum of the power of the two parts of the expander power generation unit and the gas turbine power generation unit.
2. The gas turbine and water vapor mixed ammonia composite cycle power generation system of claim 1, wherein the waste heat of the turbine exhaust gas of the gas turbine is mainly used for thermal cracking and fuel sensible heat absorption capacity of an ammonia cracker unit, gasification latent heat and fuel sensible heat absorption capacity of a liquid ammonia gasifier unit, and water vaporization latent heat and overheat heat absorption capacity of a water evaporator unit and a water vapor superheater unit, and the waste heat left after the turbine exhaust gas of the gas turbine can be continuously used for heat exchange of a heat exchanger and then enter an exhaust system for exhaust gas, and can also directly enter the exhaust system for exhaust gas.
3. The gas turbine and water vapor mixed ammonia combined cycle power generation system of claim 1, wherein the turbine expansion work is used for compression work consumption of a gas turbine compressor, and the rest is used for power generation and work production of a generator.

Description

Gas turbine adds compound circulation power generation system of mixed ammonia of steam Technical Field The invention relates to the technical field of energy and power engineering, in particular to a gas turbine and water vapor mixed ammonia compound cycle power generation system. Background As a basis for high-efficiency energy conversion and clean utilization infrastructure, gas turbines play a vital role in the modern power generation field. It has become a key device for supporting the flexible peak shaving and low-carbon transformation of a novel power system. The gas turbine is a heat engine using continuous flowing gas as working medium, and the chemical energy of fuel is converted into mechanical work through the circulation process of compressed air of a compressor, mixed fuel of a combustion chamber and air combustion and expansion work of a gas turbine. The engine has the core advantages of ① power density and light weight ‌, volume of the engine is only 1/3-1/5 of that of a diesel internal combustion engine under the same power, weight is obviously reduced, the engine is particularly suitable for space-limited ship design, maneuverability and load capacity of the ship are improved, ② is quick in response and flexibility ‌, low-temperature starting performance is excellent, full-load state can be achieved within 1-2 minutes, cold standby is short to full-load switching time, the engine is suitable for emergency peak shaving or high-dynamic scenes, ③ is environment-friendly and low in emission ‌, gas or liquid fuel is adopted, combustion is sufficient and ash-free, tail gas can be purified, the engine meets increasingly strict ship emission standards, ④ is compact in structure and is automatic ‌, a transmission mechanism is simplified, remote control is convenient to monitor and realize full automation, cabin working environment is obviously improved, intelligent technical integration such as digital twin is supported, ⑤ is low in vibration and low in noise ‌, stable in work, low-frequency components of noise is particularly suitable for ships sensitive to acoustic performance, and is friendly to ship biology. Although the advantages are outstanding, the conventional marine gas turbine has the following challenges that ① fuel economy is insufficient ‌, efficiency is obviously reduced especially in low-load operation, operation cost is increased, high-quality low-viscosity fuel is required to be used, ② torque and driving limit ‌ is high in working speed but small in output torque, a propeller is not suitable to be directly driven, system complexity is increased due to reduction of speed through a gear box, and ③ electrification degree is low. Disclosure of Invention In order to overcome the limitation of insufficient fuel economy and low electrification degree of the current marine gas turbine, the invention provides a gas turbine and water vapor mixed ammonia composite cycle power generation system, which is characterized in that the technology of ammonia cracking hydrogen production, the technology of an expander, the technology of sea water desalination, the technology of water evaporation and overheating and the gas turbine cycle are integrated, so that high-efficiency zero-carbon power generation is realized. In order to achieve the above purpose, the present invention is realized by the following technical scheme: A gas turbine and water vapor mixed ammonia composite cycle power generation system integrates a liquid ammonia storage tank, a booster pump, a liquid ammonia gasifier, an ammonia cracker, a sea water desalination device, a booster pump, a water evaporator, a water vapor superheater, an expander and a gas turbine into an integrated cycle, the system comprises a liquid ammonia storage tank and pump unit, a liquid ammonia gasifier unit, an ammonia cracker unit, a sea water desalination device and pump unit, a water evaporator unit, a water vapor superheater unit, an expander power generation unit and a gas turbine power generation unit; The turbine exhaust gas of the gas turbine is split into two streams of flue gas, one stream of flue gas passes through the ammonia cracker unit, the other stream of flue gas passes through the steam superheater unit, and then the two streams of flue gas are mixed and then sequentially pass through the liquid ammonia gasifier unit and the water evaporator unit for heat exchange and cooling, and then enter an exhaust system; Liquid ammonia is discharged from the liquid ammonia storage tank and the pump unit and then sequentially passes through the liquid ammonia gasifier unit and the ammonia cracker unit to be converted into mixed gas of ammonia, hydrogen and nitrogen; the water is converted into superheated steam after passing through a water evaporator unit and a steam superheater unit after passing through a sea water desalting device and a pump unit; the mixed gas of ammonia, hydrogen and nitrogen is mixed with superheated steam, and then enters a