A gas turbine ammonia fuel cracking supply system

Abstract

The application provides a gas turbine ammonia fuel cracking supply system, which comprises a liquid ammonia storage tank, a liquid ammonia supply pump, an air vaporizer, a heat exchanger, a first ammonia cracker, a compression expansion integrated machine and a gas turbine, etc. The liquid ammonia is supplied to the air vaporizer by the liquid ammonia supply pump; one end of the heat exchanger is communicated with the air vaporizer, and the other end is communicated with the first ammonia cracker; one end of the compression expansion integrated machine introduced by the system is communicated with the heat exchanger, and the other end is communicated with the gas turbine. The air vaporizer uses exhaust heat source to vaporize the liquid ammonia into ammonia gas. The ammonia gas discharged from the air vaporizer enters the heat exchanger, exchanges heat with cracked gas after cracking to increase the temperature, and is then introduced into the first ammonia cracker. The ammonia gas is decomposed into hydrogen and nitrogen mixed gas in the first ammonia cracker, the mixed gas can enter the heat exchanger, and after heat exchange and temperature reduction, the mixed gas enters the compression expansion integrated machine, and after pressure increasing and cooling treatment, is delivered to the gas turbine.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas turbines, in particular, to an ammonia gas turbine fuel supply system. BACKGROUND

[0002] In the ammonia-fueled gas turbine, ammonia is usually pre-cracked to generate a mixed gas of hydrogen, nitrogen and residual ammonia, which is then sent to the combustion chamber for combustion. At present, most technical solutions use a separate heat source to heat and crack ammonia, which not only increases the complexity of the system, but also leads to low energy utilization rate, failing to fully utilize the high temperature of the gas turbine exhaust. At the same time, the high-temperature and high-pressure gas generated after ammonia cracking poses a severe challenge to the fuel supply system, seriously affecting the efficiency of the system and the service life of the instruments.

[0003] The exhaust temperature of a heavy-duty gas turbine is as high as 500-600℃, which is a high-quality heat source. By selecting a suitable catalyst, ammonia can be almost completely cracked at the exhaust temperature of a constant-pressure gas turbine. Therefore, a heat exchanger can be used to fully utilize this part of heat to crack ammonia. However, the fuel supply pressure of a heavy-duty gas turbine is usually about 30 bar, so ammonia is cracked at constant pressure. However, the temperature of the cracked gas after ammonia cracking is relatively high, usually between 500-600℃, while the maximum temperature limit of the fuel of the gas turbine is about 200℃. If the cracked gas is directly supplied to the combustion chamber of the gas turbine for use, it may cause the combustion chamber to be backfired, and the existing fuel supply system cannot meet this requirement. If a method of directly cooling the cracked gas is used, it will also cause the overall efficiency of the gas turbine system to decrease.

[0004] In view of the above technical problems, the present application is proposed. SUMMARY

[0005] The main purpose of the present application is to provide a gas turbine ammonia fuel cracking supply system, which utilizes the high-temperature waste heat of the exhaust gas of the gas turbine to achieve efficient cracking of ammonia and improve the energy utilization efficiency.

[0006] In order to achieve the above purpose, the present application provides a gas turbine ammonia fuel cracking supply system, which cracks ammonia under constant pressure environment using the exhaust heat source of the gas turbine, and the system comprises:

[0007] The liquid ammonia storage tank stores liquid ammonia, the liquid ammonia is supplied to the air vaporizer by the liquid ammonia supply pump, and the air vaporizer vaporizes the liquid ammonia into ammonia gas using the exhaust heat source;

[0008] The heat exchanger, the first ammonia cracker, the heat exchanger is communicated with the air vaporizer at one end and communicated with the first ammonia cracker at the other end, the first ammonia cracker is arranged in the exhaust passage of the gas turbine, the heat exchanger receives the ammonia gas from the air vaporizer, and the ammonia gas after heat exchange is introduced into the first ammonia cracker, the ammonia gas is decomposed into hydrogen and nitrogen mixed gas in the first ammonia cracker, and the mixed gas enters the heat exchanger;

[0009] The compression and expansion integrated machine is communicated with the heat exchanger, and the compression and expansion integrated machine receives the mixed gas cooled by the heat exchanger to pressurize and cool the mixed gas.

[0010] The gas turbine is communicated with the compression and expansion integrated machine and receives the mixed gas processed by the compression and expansion integrated machine. The system introduces the compression and expansion integrated machine and the heat exchanger to effectively pressurize and cool the ammonia cracking gas, realizes the pressurization and cooling of the fuel gas with low energy consumption, meets the temperature and pressure conditions required by the fuel supply of the gas turbine, and improves the overall efficiency of the system.

[0011] The following is the further optimization of the application to the above scheme:

[0012] Further, the system further comprises a cooler, the cooler is communicated with the liquid ammonia supply pump, the liquid ammonia at the outlet of the liquid ammonia supply pump is divided into two paths, one path enters the air vaporizer to absorb heat from the ambient air to evaporate to form ammonia gas, and the other path enters the cooler as a coolant of the cooler. The cooler does not need to provide cooling water separately, can effectively preheat the original ammonia gas, and can improve the thermal efficiency of the system.

[0013] Further, the system further comprises a second ammonia cracker, the second ammonia cracker is communicated with the first ammonia cracker at one end and communicated with the heat exchanger at the other end; the mixed gas at the outlet of the first ammonia cracker is divided into two paths, one path enters the heat exchanger, and the other path enters the second ammonia cracker for further cracking and then enters the heat exchanger.

[0014] Further, the compression and expansion integrated machine comprises a primary compressor, a secondary compressor and an expander, the primary compressor receives the mixed gas from the heat exchanger, the mixed gas is pressurized by the primary compressor and then enters the cooler to be cooled, and then enters the secondary compressor to be pressurized and enters the cooler to be cooled again, and then enters the expander to be cooled further.

[0015] Further, the system further comprises a hydrogen separator, the mixed gas is divided into two paths at the outlet of the expander: one path enters the combustion chamber of the gas turbine through a fuel control valve; the other path passes through the hydrogen separator to separate hydrogen from the mixed gas.

[0016] Further, the system further comprises a supplementary combustion burner and a pressure reducing valve, the hydrogen separator is communicated with the supplementary combustion burner at one end and communicated with the pressure reducing valve at the other end.

[0017] Further, the hydrogen separator contains hydrogen molecular sieve, the hydrogen separated by the hydrogen molecular sieve enters the afterburning combustor; the gas not passing through the hydrogen molecular sieve is reduced in pressure by a pressure reducing valve and then flows into the ammonia gas path of the first ammonia cracker to perform a continuous cracking process.

[0018] Further, the system further comprises a variable frequency air blower in communication with the afterburning combustor to provide air for the afterburning combustor, and the air from the variable frequency air blower is mixed with the hydrogen separated in the hydrogen separator to burn, thereby generating high-temperature flue gas.

[0019] Further, the outlet of the afterburning combustor is connected to the second ammonia cracker to provide high temperature for the second ammonia cracker, and then the high-temperature flue gas is discharged from the second ammonia cracker and flows into the gas turbine exhaust passage before the first ammonia cracker.

[0020] Further, the system further comprises a chimney in communication with the first ammonia cracker to discharge the high-temperature flue gas.

[0021] Further, the system further comprises a blower in communication with the air vaporizer to send air into the air vaporizer.

[0022] The technical scheme of the present application at least has the following beneficial effects:

[0023] 1. The air vaporizer arranged in the system extracts heat from the atmospheric environment to vaporize liquid ammonia, thereby improving the system efficiency.

[0024] 2. The high-temperature waste heat of the gas turbine exhaust is utilized to realize efficient cracking of ammonia, thereby improving the energy utilization efficiency.

[0025] 3. The compression-expansion integrated machine is adopted to pressurize and cool the ammonia cracking gas to meet the temperature and pressure requirements of the gas turbine fuel supply. The fuel gas is pressurized and cooled at a low energy consumption, thereby further improving the overall efficiency of the system. The power required by the compressor is provided by the expander and the motor, and the output power of the motor is adjusted in real time according to the requirements, thereby simplifying the structure of the fuel supply system and making it easier to adjust and control.

[0026] 4. The afterburning combustor and the secondary cracker are additionally arranged to improve the cracking efficiency of ammonia and ensure efficient cracking of ammonia within the entire working condition range of the gas turbine.

[0027] 5. Part of the cracked gas is separated into high-purity hydrogen by the hydrogen separator, and the high-purity hydrogen enters the afterburning combustor to burn. The afterburning system uses pure hydrogen as fuel, and the concentration of NOx pollutant emission is low.

[0028] 6. The refrigerant required by the compression-expansion integrated machine is the original liquid ammonia, and a separate cooling water system is not required. Meanwhile, the original ammonia gas can be preheated, thereby improving the thermal efficiency of the system. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The illustrative embodiments of the application and their description are presented to explain the application and to provide a basis for a working of the same, but are not intended to limit the application to the scope of the embodiments specifically described herein. In the drawings:

[0030] Figure 1 A gas turbine ammonia fuel cracking supply system diagram is shown.

[0031] Wherein, the above drawings include the following reference signs:

[0032] 1, liquid ammonia storage tank; 2, liquid ammonia supply pump; 3, air vaporizer; 4, fan; 5, heat exchanger; 6, cooler;

[0033] 7, compression and expansion integrated machine; 71, variable frequency motor; 72, primary compressor; 73, secondary compressor; 74, expander;

[0034] 8, pressure reducing valve; 9, hydrogen separator; 10, hydrogen molecular sieve; 11, afterburning combustor; 12, variable frequency blower; 13, catalyst; 14, first ammonia cracker; 15, second ammonia cracker; 16, turbine; 17, combustion chamber; 18, compressor; 19, fuel control valve; 20, chimney. DETAILED DESCRIPTION

[0035] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] The present application will be further described in detail below in combination with specific embodiments, which cannot be understood as limiting the scope of the claimed application. The term "comprising" is used to indicate that the features exist, but does not exclude the presence or addition of one or more other features; the terms "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application; in addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In this description, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0038] Ammonia is a compound composed of hydrogen and nitrogen. As a highly efficient hydrogen carrier, it has the characteristic of being synthesized from renewable energy sources. In gas turbines that use ammonia as fuel, the exhaust gas from the gas turbine can be used as a heat source to crack the ammonia under atmospheric pressure.

[0039] This invention provides a gas turbine ammonia fuel cracking supply system, such as... Figure 1 As shown, the system uses the exhaust heat source of a gas turbine to crack ammonia under normal pressure. The system includes a liquid ammonia storage tank 1, a liquid ammonia supply pump 2, an air vaporizer 3, a heat exchanger 5, a first ammonia cracker 14, a compression-expansion unit 7, and a gas turbine. The liquid ammonia storage tank 1 stores liquid ammonia, which is supplied to the air vaporizer 3 via the liquid ammonia supply pump 2. One end of the heat exchanger 5 is connected to the air vaporizer 3, and the other end is connected to the first ammonia cracker 14, which is located in the exhaust passage of the gas turbine. The compression-expansion unit 7 introduced into the system is connected to the heat exchanger 5 at one end and to the gas turbine at the other end. The air vaporizer 3 uses the exhaust heat source to vaporize the liquid ammonia into ammonia gas. The ammonia gas discharged from the air vaporizer 3 enters the heat exchanger, where it exchanges heat with the cracked gas to increase its temperature, and then is introduced into the first ammonia cracker 14. Ammonia is decomposed into a mixture of hydrogen and nitrogen in the first ammonia cracker 14. The mixture then enters the heat exchanger 5, where it undergoes heat exchange and cooling before entering the integrated compressor-expander 7. In the integrated compressor-expander 7, the mixture is pressurized and cooled before being delivered to the gas turbine.

[0040] The system effectively pressurizes and cools ammonia cracking gas by introducing an integrated compressor-expander 7 and a heat exchanger 5. It achieves pressurization and cooling of fuel gas with low energy consumption, so as to meet the temperature and pressure conditions required for fuel supply to the gas turbine, thereby improving the overall efficiency of the system.

[0041] The compression-expansion integrated machine 7 can effectively increase the pressure of the fuel and preheat the vaporized ammonia in the process of reducing the temperature of the fuel, thereby significantly reducing the energy loss. The compression-expansion integrated machine 7 includes a first-stage compressor 72, a second-stage compressor 73, and an expander 74. The first-stage compressor 72 receives the mixed gas from the heat exchanger 5, the mixed gas is pressurized by the first-stage compressor 72, then enters the cooler 6 to be cooled, and then enters the second-stage compressor 73 to be pressurized, and then enters the cooler 6 to be cooled again, and then enters the expander 74 to be cooled further. In the compression-expansion integrated machine 7 and the cooler 6, the fuel is pressurized and cooled to meet the temperature and pressure requirements of the fuel supply of the combustion chamber 17 of the gas turbine. The compression-expansion integrated machine 7 integrates the multi-stage compressor, the expander 74, and the variable frequency motor 71, and the components are coaxially designed. The power required by the compressor is provided by the expander 74 and the motor, and the output power of the motor can be adjusted in real time according to the actual demand, thereby reducing the energy consumption of fuel pressurization and realizing efficient use of energy.

[0042] The refrigerant required by the compression-expansion integrated machine 7 is the original liquid ammonia, and a separate cooling water system is not required, and the original ammonia can be preheated, thereby improving the thermal efficiency of the system.

[0043] In the system, the air vaporizer 3 is provided, the liquid ammonia can be gasified directly by using the heat in the air, and the system efficiency is improved. The ammonia gas discharged from the air vaporizer 3 enters the heat exchanger 5 to exchange heat with the cracked gas to be heated, and then enters the first ammonia cracker 14 in the exhaust passage of the gas turbine. In the first ammonia cracker 14, the ammonia gas absorbs the waste heat of the exhaust gas of the gas turbine and is efficiently decomposed into hydrogen and nitrogen mixed gas under the action of the catalyst 13. After the ammonia gas is cracked into hydrogen and nitrogen mixed gas, the mixed gas is sent to the gas turbine, and the gas turbine includes a turbine 16, a compressor 18, and a combustion chamber 17. The mixed gas is combusted in the combustion chamber 17. The system extracts heat from the atmosphere, fully utilizes the waste heat of the exhaust gas of the gas turbine, improves the reaction activity of the fuel entering the combustion chamber 17, facilitates the combustion organization in the combustion chamber 17, and can realize a higher ammonia cracking rate and a higher system efficiency.

[0044] The air vaporizer 3 is provided with a forced air supply system, and the fan 4 is in communication with the air vaporizer 3 to send air into the air vaporizer 3, thereby strengthening heat exchange and controlling the evaporation amount of the liquid ammonia. The air is sent into the air vaporizer 3 by the fan 4, heated liquid ammonia is discharged into the atmosphere.

[0045] The system is also provided with a cooler 6. The cooler 6 is communicated with the liquid ammonia supply pump 2, and the liquid ammonia at the outlet of the liquid ammonia supply pump 2 is divided into two paths, one of which enters the air vaporizer 3 to absorb the heat in the ambient air to evaporate to form ammonia gas, and the other of which enters the cooler 6 to serve as the coolant of the cooler 6. The coolant liquid ammonia in the cooler 6 absorbs the heat generated by the two-time compression of the ammonia cracking gas in the cooler 6, is vaporized and heated, and then flows into the original ammonia gas path before the ammonia cracker. The cooler 6 does not need to be provided with cooling water separately, and can effectively preheat the original ammonia gas, so that the thermal efficiency of the system can be improved.

[0046] The cracking process of ammonia gas has strict requirements on temperature, pressure and reaction time, and in the starting and low load state of the gas turbine, the primary cracking mode is often difficult to ensure sufficient cracking of ammonia gas. The present application improves the cracking efficiency of ammonia gas by additionally providing the supplementary combustion burner 11 and the second ammonia cracker 15, so that efficient cracking of ammonia gas can be ensured in the entire working condition range of the gas turbine.

[0047] The second ammonia cracking gas 15 is communicated with the first ammonia cracker at one end and with the heat exchanger 5 at the other end. The mixed gas at the outlet of the first ammonia cracker is divided into two paths, one of which enters the heat exchanger 5, and the other of which enters the second ammonia cracking gas 15 for further cracking, and then enters the heat exchanger 5. The high-temperature ammonia cracking gas in the heat exchanger 5 exchanges heat with the normal-temperature ammonia gas, and then enters the compression-expansion integrated machine 7 and the cooler 6.

[0048] Preferably, the system further comprises a hydrogen separator 9. The hydrogen separator 9 is communicated with the supplementary combustion burner 11 at one end. At the outlet of the expansion machine 74, the mixed gas is divided into two paths: one of which enters the gas turbine through the fuel control valve 19, and the mixed gas enters the combustion chamber 17 to be combusted and heated, so as to provide power for the gas turbine; the other of which passes through the hydrogen separator 9 to separate hydrogen from the ammonia cracking gas. The hydrogen separator 9 contains a hydrogen molecular sieve 10, and hydrogen molecules can pass through the hydrogen molecular sieve, while the nitrogen and residual ammonia molecules in the ammonia cracking gas are too large to pass through the hydrogen molecular sieve 10. The hydrogen separated by the hydrogen molecular sieve enters the supplementary combustion burner 11, and the gas not passing through the hydrogen molecular sieve 10 is depressurized by the pressure reducing valve 8 and then flows into the ammonia gas path of the first ammonia cracker 14 to undergo a continuous cracking process.

[0049] The high-purity hydrogen separated by the hydrogen separator 9 enters the supplementary combustion burner 11 to be combusted. The supplementary combustion burner 11 uses pure hydrogen as fuel, and the concentration of NOx pollutants is low, so that the concentration of NOx emissions of the gas turbine will not increase.

[0050] The system utilizes the high-temperature waste heat of the gas turbine exhaust to achieve efficient ammonia cracking, thereby improving energy utilization efficiency, and the heat energy generated by the compression-expansion integrated machine 7 during operation can be used to preheat the original ammonia, thereby improving the thermal efficiency of the system. The power required by the compressor is provided by the expander 74 and the motor, and the output power of the motor is adjusted in real time according to the demand, which simplifies the structure of the fuel supply system and makes it easier to adjust and control.

[0051] The system also includes a pressure reducing valve 8, a variable frequency air blower 12, and a chimney 20. The pressure reducing valve 8 is in communication with the hydrogen separator 9. The variable frequency air blower 12 is in communication with the supplementary combustion burner 11 to provide air for the supplementary combustion burner 11. In the supplementary combustion burner 11, the air from the variable frequency air blower 12 and the hydrogen separated from the hydrogen separator 9 are mixed and burned to produce high-temperature flue gas. At the outlet of the supplementary combustion burner 11, the high-temperature flue gas enters the second ammonia cracker 15 to provide the required high-temperature environment and heat for ammonia cracking, and then is discharged from the second ammonia cracker 15 and flows into the gas turbine exhaust passage before the first ammonia cracker 14, and is discharged through the chimney 20 in communication with the first ammonia cracker 14.

[0052] The ammonia gas turbine fuel cracking supply system provided by the present application utilizes the heat in the atmospheric environment to vaporize liquid ammonia, utilizes the gas turbine exhaust as a heat source to crack ammonia under normal pressure, and uses the hydrogen generated by cracking to perform supplementary combustion to further promote the ammonia fuel cracking process. In order to cope with the low-pressure and high-temperature characteristics of ammonia cracking gas, the system uses the compression-expansion integrated machine 7 technology, which not only effectively pressurizes and cools the ammonia cracking gas to meet the temperature and pressure conditions required for gas turbine fuel supply, but also simplifies the structure of the fuel supply system, making it easier to adjust and control. In addition, the compression-expansion integrated machine 7 in the system realizes the pressurization and cooling of the fuel gas with low energy consumption, further improving the overall efficiency of the system. The heat energy generated by the compression-expansion integrated machine 7 during operation can be used to preheat the original ammonia, thereby improving the thermal efficiency of the system.

[0053] In summary, from the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0054] 1. The air vaporizer 3 provided in the system extracts heat from the atmospheric environment to vaporize liquid ammonia, improving the efficiency of the system.

[0055] 2. The high-temperature waste heat of the gas turbine exhaust is utilized to achieve efficient ammonia cracking, thereby improving energy utilization efficiency.

[0056] 3、The compressed expansion integrated machine 7 is used to pressurize and cool the ammonia cracking gas, so as to meet the temperature and pressure requirements of the fuel supply of the gas turbine. The fuel gas is pressurized and cooled with low energy consumption, and the overall efficiency of the system is further improved. The power required by the compressor is provided by the expander 74 and the motor, and the output power of the motor is adjusted in real time according to the requirements, which simplifies the structure of the fuel supply system and makes it easier to adjust and control.

[0057] 4、By additionally arranging the supplementary combustion combustor 11 and the secondary cracker, the ammonia cracking efficiency is improved, and the efficient cracking of ammonia gas in the entire working condition range of the gas turbine is ensured.

[0058] 5、Part of the cracked gas after cracking is separated into high-purity hydrogen by the hydrogen separator 9, and enters the supplementary combustion combustor 11 for combustion. The supplementary combustion system uses pure hydrogen as fuel, and the concentration of NOx pollutant emission is low.

[0059] 6、The refrigerant required by the compressed expansion integrated machine 7 is the original liquid ammonia, and a separate cooling water system is not needed, and the original ammonia gas can be preheated, so that the thermal efficiency of the system is improved.

[0060] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A gas turbine ammonia fuel cracking supply system, said system employing the exhaust heat source of said gas turbine to crack said ammonia in an ambient pressure environment, characterized by, The system comprises: a liquid ammonia storage tank (1), a liquid ammonia supply pump (2) and an air vaporizer (3), the liquid ammonia storage tank (1) stores liquid ammonia, the liquid ammonia is supplied to the air vaporizer (3) by the liquid ammonia supply pump (2), and the air vaporizer (3) vaporizes the liquid ammonia into ammonia gas by using ambient air; a heat exchanger (5) and a first ammonia cracker (14), one end of the heat exchanger (5) is communicated with the air vaporizer (3), the other end is communicated with the first ammonia cracker (14), the first ammonia cracker (14) is arranged in an exhaust passage of the gas turbine, the heat exchanger (5) receives the ammonia gas from the air vaporizer (3) and guides the ammonia gas after heat exchange into the first ammonia cracker (14), the ammonia gas is decomposed into hydrogen and nitrogen mixed gas in the first ammonia cracker (14), and the mixed gas enters the heat exchanger (5); a compression and expansion integrated machine (7) communicated with the heat exchanger (5), the compression and expansion integrated machine (7) receives the mixed gas cooled by the heat exchanger (5) to pressurize and cool the mixed gas; a gas turbine communicated with the compression and expansion integrated machine (7) and receiving the mixed gas processed by the compression and expansion integrated machine (7); the system further comprises a second ammonia cracker (15), one end of the second ammonia cracker (15) is communicated with the first ammonia cracker (14), and the other end is communicated with the heat exchanger (5); the mixed gas at the outlet of the first ammonia cracker (14) is divided into two paths, one path enters the heat exchanger (5), and the other path enters the second ammonia cracker (15) and is further cracked, and then enters the heat exchanger (5) again; the system further comprises a hydrogen separator (9) at the outlet of the compression and expansion integrated machine (7), the mixed gas is divided into two paths: one path enters the combustion chamber (17) of the gas turbine through a fuel control valve (19); the other path passes through the hydrogen separator (9) to separate hydrogen from the mixed gas; the system further comprises a supplementary combustion burner (11) and a pressure reducing valve (8), one end of the outlet of the hydrogen separator (9) is communicated with the supplementary combustion burner (11), and the other end is communicated with the pressure reducing valve (8), the pressure reducing valve (8) is connected to the first ammonia cracker (14), and the supplementary combustion burner (11) is connected to the second ammonia cracker (15).

2. The ammonia fuel cracking supply system according to claim 1, characterized by, the system further comprises a cooler (6) communicated with the liquid ammonia supply pump (2), the liquid ammonia at the outlet of the liquid ammonia supply pump (2) is divided into two paths, one path enters the air vaporizer (3) to evaporate to form ammonia gas by absorbing heat in ambient air, and the other path enters the cooler (6) as refrigerant of the cooler (6).

3. The ammonia fuel cracking supply system according to claim 2, characterized by, The compression-expansion integrated machine (7) comprises a first-stage compressor (72), a second-stage compressor (73) and an expander (74), the first-stage compressor (72) receives the mixed gas from the heat exchanger (5), the mixed gas is pressurized by the first-stage compressor (72) and then enters the cooler (6) to be cooled, and then enters the second-stage compressor (73) to be pressurized, and then enters the cooler (6) to be cooled, and then enters the expander (74) to be further cooled.

4. The ammonia fuel cracking supply system according to claim 3, characterized by, The hydrogen separator (9) contains a hydrogen molecular sieve (10), the hydrogen separated by the hydrogen molecular sieve (10) enters the afterburning combustor (11); the gas not passing through the hydrogen molecular sieve (10) is depressurized by the pressure reducing valve (8) and then flows into the ammonia gas path of the first ammonia cracker (14) to continue the cracking process.

5. The ammonia fuel cracking supply system according to claim 4, characterized by The system further comprises a variable frequency air blower (12) which communicates with the afterburning combustor (11) to provide air for the afterburning combustor (11), the air sent by the variable frequency air blower (12) is mixed with the hydrogen separated from the hydrogen separator (9) to produce high-temperature flue gas.

6. The ammonia fuel cracking supply system according to claim 5, characterized by The outlet of the afterburning combustor (11) is connected to the second ammonia cracker (15) to provide high temperature for the second ammonia cracker (15), and then the high-temperature flue gas is discharged from the second ammonia cracker (15) and flows into the gas turbine exhaust passage before the first ammonia cracker (14).

7. The ammonia fuel cracking supply system according to claim 6, characterized by The system further comprises a chimney (20) which communicates with the first ammonia cracker (14) to discharge the high-temperature flue gas.

8. The ammonia fuel cracking supply system according to claim 7, characterized by, The system further comprises a fan (4) which communicates with the air vaporizer (3) to send air into the air vaporizer (3).

Images