Ammonia-fueled combustion systems and gas turbine equipment

Abstract

When ammonia is used as fuel for a gas turbine, the emission of ammonia to the outside is suppressed. [Solution] A gas turbine facility includes a gas turbine, an ammonia supplying device that supplies ammonia to a combustor of the gas turbine, a flow path forming frame that forms an exhaust gas flow path through which exhaust gas from the gas turbine flows, a sprinkling device having a sprinkler that can sprinkle water into the exhaust gas flow path, and a sprinkling controller that controls the operation of the sprinkling device. The sprinkling controller commands the sprinkling device to start sprinkling water on condition that an ammonia supply start command or an ammonia supply stop command to the combustor is received from the ammonia supplying device.

Description

[Technical field]

[0001] The present disclosure relates to an ammonia-fueled Combustion Systems and Gas Turbine Equipment Regarding. [Background technology]

[0002] A gas turbine includes a compressor that compresses air, a combustor that burns fuel in the air compressed by the compressor to generate combustion gas, and a turbine that is driven by the combustion gas. The following Patent Document 1 discloses a gas turbine facility that uses ammonia as fuel to be supplied to the combustor. When ammonia is used as fuel for the gas turbine, when the ammonia is burned, part of the nitrogen that forms the ammonia becomes NOx. For this reason, this gas turbine facility is provided with a denitrification device in the flow path through which exhaust gas from the gas turbine flows. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-178840 A [Patent Document 2] JP 2015-4284 A [Patent Document 3] JP 2018-162752 A [Patent Document 4] JP 2004-36983 A Summary of the Invention [Problem to be solved by the invention]

[0004] When ammonia is used as fuel for a gas turbine, it is desirable to suppress not only NOx but also the ammonia itself from being discharged unburned to the outside.

[0005] In view of the above, an object of the present disclosure is to provide a technique capable of suppressing the emission of ammonia to the outside when ammonia is used as fuel for a gas turbine. [Means for solving the problem]

[0006] To achieve the above objectives First The gas turbine facility according to an embodiment includes: a gas turbine having a combustor; The combustor is characterized in that it is provided with an ammonia emission suppression means for suppressing the ammonia supplied to the combustor before combustion begins in the combustor or after an accidental fire from being discharged to the outside, and the ammonia emission suppression means includes a water sprinkler.

[0007] A combustion system as a second aspect for achieving the above-mentioned object includes an internal combustion engine that combusts fuel, an ammonia supplying device that supplies ammonia to the internal combustion engine as fuel, and an ammonia emission suppression means that suppresses ammonia from being discharged to the outside, and the ammonia emission suppression means includes a water sprinkler device.

[0008] In addition, the combustion system as a second aspect of the present invention has a tank in which the sprinkler device can recover and store ammonia absorbed into water by sprinkling, as ammonia water, and is provided with a denitration device that is arranged upstream of the ammonia emission suppression means in the flow direction of the exhaust gas and removes nitrogen oxides from the exhaust gas, and an ammonia water supply line that can supply the ammonia water stored in the tank to the denitration device. The denitration device uses the ammonia water supplied from the tank and, through the action of a catalyst, breaks down NOx contained in the exhaust gas into nitrogen and water vapor.

[0009] Further, in the combustion system according to the second aspect, The ammonia supply device has an ammonia line for supplying ammonia as fuel, and one end of a purge gas line for supplying a purge gas from a purge gas supply source is connected to the ammonia line, and the sprinkler device sprinkles water on the purged ammonia to recover it as ammonia water.

[0010] A combustion system according to a third aspect for achieving the above object includes a combustion device that burns fuel, an ammonia supply device that supplies ammonia as fuel to the combustion device, a heat exchanger that heats water with heat generated by the combustion of the fuel and changes its state to water vapor, and an ammonia emission suppression device that suppresses ammonia from being discharged to the outside, the ammonia emission suppression device including a water sprinkler device. .

[0011] Moreover, the combustion system according to the third aspect includes a denitration device that is disposed upstream of the ammonia emission suppression means in the exhaust gas flow direction and that removes nitrogen oxides from the exhaust gas. Effect of the Invention

[0012] The present disclosure each In an aspect, Gas turbine equipment and other combustion systems As fuel for Ammonia When used, it is possible to suppress the emission of ammonia to the outside. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a system diagram of a gas turbine facility in a first embodiment according to the present disclosure. [Diagram 2] 5 is a flowchart showing the operation of a control device in a process of starting the supply of ammonia in an embodiment according to the present disclosure. [Diagram 3] 5 is a flowchart showing the operation of a control device in a process of stopping the supply of ammonia in an embodiment according to the present disclosure. [Figure 4] FIG. 4 is a system diagram of a gas turbine facility in a second embodiment according to the present disclosure. [Diagram 5]FIG. 11 is a cross-sectional view of a chimney in a second embodiment according to the present disclosure. [Figure 6] FIG. 11 is a system diagram of a gas turbine facility in a third embodiment according to the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, various embodiments and various modified examples of a gas turbine facility according to the present disclosure will be described with reference to the drawings.

[0015] "First embodiment" Hereinafter, a first embodiment of a gas turbine facility according to the present disclosure will be described with reference to FIGS. 1 to 3. FIG.

[0016] As shown in FIG. 1, the gas turbine facility of this embodiment includes a gas turbine 10, an ammonia supplying device 20 that supplies ammonia as fuel to the gas turbine 10, a heat recovery boiler 30 that generates steam by utilizing the heat of exhaust gas exhausted from the gas turbine 10, a steam turbine 41 that is driven by steam from the heat recovery boiler 30, a condenser 43 that converts the steam from the steam turbine 41 back into water, a pump 45 that sends water in the condenser 43 to the heat recovery boiler 30, a chimney 33 that exhausts exhaust gas from the heat recovery boiler 30 to the outside, a denitrification device 50 that decomposes NOx contained in the exhaust gas from the gas turbine 10, a sprinkler device 60 that sprinkles water in the heat recovery boiler 30, a mist eliminator 70, a water recovery line 71, an ammonia water supplying device 74, and a control device 90.

[0017] The gas turbine 10 includes a compressor 14 that compresses air A, a combustor 15 that burns fuel in the air compressed by the compressor 14 to generate combustion gas, and a turbine 16 that is driven by the high-temperature, high-pressure combustion gas.

[0018] The compressor 14 has a compressor rotor 14r that rotates about a rotor axis Ar and a compressor casing 14c that covers the compressor rotor 14r. The turbine 16 has a turbine rotor 16r that rotates about a rotor axis Ar by combustion gas from a combustor 15 and a turbine casing 16c that covers the turbine rotor 16r. The turbine rotor 16r and the compressor rotor 14r are connected to each other so as to be rotatable about the same rotor axis Ar to form a gas turbine rotor 11. For example, a rotor of a generator G is connected to the gas turbine rotor 11. Although the gas turbine 10 is a single-shaft gas turbine having one gas turbine rotor, the gas turbine may be a two-shaft gas turbine or a three-shaft gas turbine.

[0019] The gas turbine 10 further includes an intermediate casing 12. The intermediate casing 12 is disposed between the compressor casing 14c and the turbine casing 16c in the direction in which the rotor axis Ar extends, and connects the compressor casing 14c and the turbine casing 16c. Compressed air discharged from the compressor 14 flows into the intermediate casing 12. The combustor 15 is fixed to the intermediate casing 12. The combustor 15 includes a combustion liner (or a transition piece) 15c, a fuel nozzle 15n that injects fuel into the combustion liner 15c, and an ignition plug 15i that ignites the fuel injected into the combustion liner 15c.

[0020] The ammonia supply device 20 includes an ammonia tank 21 , an ammonia line 22 , an ammonia pump 23 , a vaporizer 24 , a fuel control valve 25 , a purge gas line 26 , and a purge gas control valve 27 .

[0021] The ammonia tank 21 stores liquid ammonia. One end of the ammonia line 22 is connected to the ammonia tank 21, and the other end of the ammonia line 22 is connected to the fuel nozzle 15n of the combustor 15. The ammonia pump 23 is provided in the ammonia line 22. The ammonia pump 23 pressurizes the ammonia in the ammonia tank 21 and sends the ammonia to the combustor 15. The vaporizer 24 is provided in the ammonia line 22 at a position closer to the combustor 15 than the ammonia pump 23. The vaporizer 24 is a heat exchanger that exchanges heat between a heating medium and liquid ammonia to heat and vaporize the liquid ammonia. The ammonia supply device may include a sprayer that sprays liquid ammonia into a space and converts the liquid ammonia into mist ammonia, instead of the vaporizer 24. The fuel control valve 25 is provided in the ammonia line 22 at a position closer to the combustor 15 than the vaporizer 24. The fuel regulating valve 25 regulates the flow rate of ammonia as fuel supplied to the combustor 15. One end of a purge gas line 26 is connected to a position in the ammonia line 22 closer to the combustor 15 than the fuel regulating valve 25. A purge gas supply source (not shown) is connected to the other end of the purge gas line 26. The purge gas regulating valve 27 is provided in the purge gas line 26. The purge gas regulating valve 27 regulates the flow rate of purge gas sent from the purge gas supply source to the ammonia line 22. The purge gas is, for example, nitrogen gas.

[0022] The heat recovery steam generator 30 exchanges heat between the exhaust gas discharged from the gas turbine 10 and water, heating the water to generate steam. The heat recovery steam generator 30 has a duct 31 connected to the gas turbine 10, and a heat transfer tube 32 disposed in the duct 31. The duct 31 forms a duct gas flow path 36 through which the exhaust gas from the gas turbine 10 flows. Liquid or gaseous water flows in the heat transfer tube 32. Note that a heat medium other than water may flow in the heat transfer tube 32.

[0023] One end of the heat transfer tubes 32 in the heat recovery steam generator 30 and a steam inlet of a steam turbine 41 are connected by a main steam line 42. Steam from the heat transfer tubes 32 is sent to the steam turbine 41 via this main steam line 42. A rotor of a generator, for example, is connected to the rotor of the steam turbine 41. Steam exhausted from the steam turbine 41 is returned to water by a condenser 43. The other end of the heat transfer tubes 32 in the heat recovery steam generator 30 and the condenser 43 are connected by a water feed line 44. A pump 45 that sends water in the condenser 43 to the heat recovery steam generator 30 is provided in this water feed line 44.

[0024] The chimney 33 is connected to the duct 31 of the heat recovery steam generator 30. The chimney 33 is formed with a chimney gas passage 37 that exhausts the exhaust gas from the duct 31 to the outside. This chimney gas passage 37 extends in the vertical direction. In this embodiment, an exhaust gas passage 35 through which exhaust gas from the gas turbine 10 flows has a duct gas passage 36 and a chimney gas passage 37. Therefore, in this embodiment, a passage forming frame 34 that forms the exhaust gas passage 35 has the duct 31 and the chimney 33 of the heat recovery steam generator 30.

[0025] The denitration device 50 includes a catalyst layer 51 disposed in the duct 31 of the heat recovery boiler 30, an ammonia sprayer 52 that sprays ammonia water upstream of the catalyst layer 51 in the gas flow direction, an ammonia water supply line 53 that supplies ammonia water to the ammonia sprayer 52, and an ammonia water control valve 54. The ammonia water control valve 54 adjusts the flow rate of ammonia water flowing through the ammonia water supply line 53. The denitration device 50 uses the ammonia water to decompose NOx contained in the exhaust gas from the gas turbine 10 into nitrogen and water vapor through the action of the catalyst.

[0026] The sprinkler 60 includes a sprinkler 61 capable of sprinkling water into the duct gas flow passage 36, a water tank 62 capable of storing water to be sprinkled by the sprinkler 61, and a water supply device 66 capable of supplying the water in the water tank 62 to the sprinkler 61. The sprinkler 61 is disposed in the duct 31 downstream of the denitrification device 50 and the heat transfer tube 32 in the gas flow direction. In the duct 31, a mist eliminator 70 capable of capturing mist in the duct gas flow passage 36 is disposed downstream of the sprinkler 61 in the gas flow direction. The mist eliminator 70 is, for example, composed of a net or a pad formed of a plurality of fibers. The water supply device 66 includes a water line 67 connecting the water tank 62 and the sprinkler 61, a water supply pump 68 provided in the water line 67, and a water control valve 69 provided in the water line 67 on the sprinkler 61 side of the water supply pump 68.

[0027] One end of the water recovery line 71 is connected to a position in the duct 31 downstream of the mist eliminator 70 in the gas flow direction, or to a region in which the mist eliminator 70 is disposed in the gas flow direction. The other end of the water recovery line 71 is connected to the water tank 62. That is, the water recovery line 71 is a line that returns water sprayed from the sprinkler 61 into the duct 31 to the water tank 62. The water tank 62 is provided with a make-up water line 63 that can supply water into the water tank 62. The water tank 62 is further provided with an ammonia concentration meter 64 that can detect the ammonia concentration in the water tank 62.

[0028] The ammonia water supply device 74 has an ammonia water sub-line 75, an ammonia water sub-control valve 76, and the above-mentioned water supply pump 68. The ammonia water sub-line 75 connects a position in the water line 67 in the sprinkler 60 that is closer to the sprinkler 61 than the water supply pump 68 and closer to the water tank 62 than the water control valve 69, to a position in the ammonia water supply line 53 that is closer to the ammonia sprinkler 52 than the ammonia water control valve 54. The ammonia water sub-control valve 76 is provided in this ammonia water sub-line 75. The water supply pump 68 is one of the components of this ammonia water supply device 74 and is also one of the components of the sprinkler 60.

[0029] The control device 90 has a gas turbine controller 91 and a sprinkling controller 92. The gas turbine controller 91 controls the operation of the fuel control valve 25 and the purge gas control valve 27 in response to various instruments provided in the gas turbine 10 and external instructions. The sprinkling controller 92 controls the operation of the sprinkling device 60. Specifically, the sprinkling controller 92 controls the operation of the water supply pump 68 and the water control valve 69. Both the gas turbine controller 91 and the sprinkling controller 92 have a CPU (Central Processing Unit) that executes various calculations, and a memory that is a work area for this CPU. The gas turbine controller 91 and the sprinkling controller 92 may be configured with a mutually shared CPU and a mutually shared memory.

[0030] Next, the operation of the gas turbine facility described above will be described.

[0031] When starting the gas turbine 10, the start-up motor is driven to rotate the gas turbine rotor 11. The start-up motor may be separately connected to the gas turbine rotor 11, or a generator connected to the gas turbine rotor 11 may serve as the start-up motor. When starting the gas turbine 10, a diesel engine may be started to rotate the gas turbine rotor 11, or a steam turbine may be used to rotate the gas turbine rotor 11.

[0032] The rotation speed of the gas turbine rotor 11 gradually increases as the start-up motor is driven. During this process, ammonia is supplied as fuel to the combustor 15. Here, the operation of the control device 90 during the process of starting the supply of ammonia to the combustor 15 will be described with reference to the flowchart shown in FIG.

[0033] During the start-up process of the gas turbine 10, the gas turbine controller 91 judges whether or not the supply start condition of ammonia as fuel is satisfied (S10: supply start condition judgment step). When the rotation speed of the gas turbine rotor 11 reaches a predetermined rotation speed by driving the start-up motor, the gas turbine controller 91 judges that the supply start condition of ammonia as fuel is satisfied, and instructs the fuel control valve 25 and the sprinkler controller 92 to start the supply of ammonia (S11: supply start instruction step). Specifically, the gas turbine controller 91 instructs the fuel control valve 25 to open. Upon receiving this instruction, the fuel control valve 25 opens. As a result, the supply of ammonia to the combustor 15 is started. Specifically, the portion of the ammonia line 22 closer to the combustor 15 than the fuel control valve 25 and the inside of the fuel nozzle 15n of the combustor 15 are filled with ammonia, and ammonia starts to be injected into the combustion liner 15c of the combustor 15.

[0034] When a predetermined time (e.g., several minutes) has elapsed since the supply of ammonia to the combustor 15 was started, the gas turbine controller 91 causes the spark plug 15i to ignite the ammonia in the combustion liner 15c (S12: ignition command step). As a result, the combustion of the ammonia in the combustion liner 15c is started.

[0035] As described above, the gas turbine controller 91 instructs not only the fuel regulating valve 25 but also the sprinkling controller 92 to start supplying ammonia. When the sprinkling controller 92 receives this instruction (S15: step of receiving an instruction to start supplying), it instructs the sprinkling device 60 to start sprinkling (S17: step of instructing to start sprinkling). Specifically, the sprinkling controller 92 instructs the water supply pump 68 of the sprinkling device 60 to drive it, and instructs the water regulating valve 69 to open. As a result, water in the water tank 62 starts to be supplied to the sprinkler 61 arranged in the duct 31 of the heat recovery boiler 30 via the water line 67, and sprinkling of water starts in the duct gas passage 36 (S16: sprinkling step).

[0036] The sprinkling controller 92 judges whether a predetermined time (for example, several minutes) has elapsed since receiving the instruction to start the ammonia supply (S18: step of judging whether the sprinkling stop condition is satisfied). The end of the predetermined time is later than the time when the ignition of the ammonia is completed. In other words, the end of the predetermined time is later than the time when it is assumed that the unburned ammonia will no longer be exhausted from the gas turbine 10. When the sprinkling controller 92 judges that the predetermined time has elapsed since receiving the instruction to start the ammonia supply, the sprinkling controller 92 instructs the sprinkling device 60 to stop sprinkling (S19: step of instructing to stop sprinkling). Specifically, the sprinkling controller 92 instructs the water supply pump 68 of the sprinkling device 60 to stop driving, and instructs the water control valve 69 to close. As a result, the sprinkling of water from the sprinkler 61 into the duct gas passage 36 is stopped, and the sprinkling step (S16) is completed.

[0037] During the period from when the fuel regulating valve 25 opens until the ammonia in the combustion tube 15c is ignited, the ammonia flowing out from the fuel regulating valve 25 is exhausted from the gas turbine 10 without being burned. This ammonia flows in the duct gas passage 36 in the duct 31 of the exhaust heat recovery boiler 30. In this embodiment, the gas turbine controller 91 instructs the fuel regulating valve 25 to start the supply of ammonia (S11) and starts water sprinkling (S16). Therefore, during the process of starting the supply of ammonia to the combustor 15, the ammonia exhausted from the gas turbine 10 is absorbed in the water droplets from the water sprinkler 61. The water droplets that have absorbed the ammonia are collected in the mist eliminator 70, and then accumulate in the lower part of the duct 31, and return to the water tank 62 via the water recovery line 71. That is, the liquid containing the water sprinkled in the duct gas passage 36, which is a part of the exhaust gas passage 35, is led to the outside of the duct 31, which is a part of the passage forming frame 34. The water recovery process for guiding water to the outside of the flow passage forming frame 34 is carried out in parallel with the water spray process.

[0038] Once the ammonia is ignited in the combustion tubular 15c, the ammonia supplied to the combustor 15 continues to burn in the combustion tubular 15c unless it misfires. Therefore, once the ammonia is ignited in the combustion tubular 15c, the ammonia is not exhausted from the gas turbine 10 unless it misfires. Therefore, in this embodiment, after a predetermined time has elapsed since the instruction to start the supply of ammonia was received and the ignition of the ammonia is completed, the sprinkler 61 stops sprinkling water into the duct gas passage 36.

[0039] As described above, when the ammonia is ignited in the combustion tube 15c, the combustion of the ammonia is started. The combustion gas generated by this combustion is sent to the turbine 16 and rotates the turbine rotor. The combustion gas that rotates the turbine rotor is exhausted from the gas turbine 10 as exhaust gas and flows through the duct 31 of the heat recovery boiler 30. When the ammonia is burned, the exhaust gas contains NOx. Therefore, in this embodiment, after the combustion of the ammonia is started, the supply of ammonia water from the ammonia water supply source to the denitration device 50 via the ammonia water supply line 53 is started, and the NOx contained in the exhaust gas is decomposed into nitrogen and water vapor.

[0040] When the water sprinkling step (S16) is repeatedly performed and the water that has absorbed ammonia returns to the water tank 62 each time, the ammonia concentration in the water in the water tank 62 gradually increases. The ammonia concentration in the water tank 62 is detected by the ammonia concentration meter 64. When the ammonia concentration detected by the ammonia concentration meter 64 is equal to or higher than a predetermined concentration and under conditions that require denitration by the denitration device 50, the ammonia water sub-control valve 76 opens and the water that has absorbed ammonia in the water tank 62 is supplied to the denitration device 50 via the ammonia water sub-line 75. The denitration device 50 uses this ammonia water to decompose NOx contained in the exhaust gas into nitrogen and water vapor. Therefore, in this embodiment, the amount of ammonia water used from the ammonia water supply source for denitration can be reduced.

[0041] Next, the operation of the control device 90 in the process of stopping the supply of ammonia to the combustor 15 will be described with reference to the flowchart shown in FIG.

[0042] While ammonia is being supplied to the combustor 15, the gas turbine controller 91 determines whether or not a condition for stopping the supply of ammonia as fuel is satisfied (S20: step of determining whether or not a condition for stopping the supply is satisfied).

[0043] Here, the case where the condition for stopping the supply of ammonia is satisfied is as follows: a. When a normal shutdown of the gas turbine 10 is received from outside b. When it becomes necessary to perform an emergency shutdown of the gas turbine 10 due to some trouble, either due to an external command or due to signals from various sensors installed in the gas turbine 10. It is. Specific examples of situations in which the gas turbine 10 needs to be shut down in an emergency include a case in which ammonia misfires in the combustion tube 15c, and a case in which an emergency shutdown of the generator connected to the gas turbine 10 and the external power system is received from outside.

[0044] When the gas turbine controller 91 determines that the ammonia supply stop condition is satisfied, it instructs the fuel control valve 25 and the water spray controller 92 to stop the supply of ammonia (S21: supply stop instruction process). Specifically, the gas turbine controller 91 instructs the fuel control valve 25 to close. Upon receiving this instruction, the fuel control valve 25 is closed. As a result, the supply of ammonia to the combustor 15 is stopped. Furthermore, the gas turbine controller 91 instructs the purge gas control valve 27 to open (S22: purge start instruction process). Upon receiving this instruction, the purge gas control valve 27 is opened. As a result, a purge gas such as nitrogen is sent from the purge gas supply source to the ammonia line 22. The purge gas pushes ammonia in the portion of the ammonia line 22 that is closer to the combustor 15 than the fuel control valve 25 and in the fuel nozzle 15n of the combustor 15 into the combustion liner 15c.

[0045] When a predetermined time (e.g., several minutes) has elapsed since the supply of ammonia to the combustor 15 was stopped, the gas turbine controller 91 instructs the purge gas control valve 27 to close (S23: purge end instruction step). The end of this predetermined time is the time when the supply of ammonia to the combustor 15 is stopped, the rotation speed of the gas turbine rotor 11 gradually decreases, and the spatial velocity of the gas in the turbine casing becomes equal to or lower than a predetermined speed. In other words, the end of this predetermined time is a time later than the time when it is assumed that unburned ammonia is not substantially exhausted from the gas turbine 10. Upon receiving this instruction, the purge gas control valve 27 closes, and the purge gas is no longer sent from the purge gas supply source to the ammonia line 22.

[0046] As described above, the gas turbine controller 91 instructs not only the fuel regulating valve 25 but also the sprinkling controller 92 to stop the supply of ammonia. When the sprinkling controller 92 receives this instruction (S25: step of receiving an instruction to stop supply), it instructs the sprinkling device 60 to start sprinkling (S27: step of instructing to start sprinkling). Specifically, the sprinkling controller 92 instructs the water supply pump 68 of the sprinkling device 60 to drive it, and instructs the water regulating valve 69 to open. As a result, water in the water tank 62 starts to be supplied to the sprinkler 61 arranged in the duct 31 of the exhaust heat recovery boiler 30 via the water line 67, and sprinkling of water starts in the duct gas passage 36 (S26: sprinkling step).

[0047] The sprinkling controller 92 judges whether a predetermined time (e.g., several minutes) has elapsed since receiving the instruction to start the ammonia supply (S28: step of judging whether the sprinkling stop condition is satisfied). The end of this predetermined time is later than the time when the purge gas control valve 27 is closed. When the sprinkling controller 92 judges that the predetermined time has elapsed since receiving the instruction to stop the ammonia supply, it instructs the sprinkling device 60 to stop sprinkling (S29: step of instructing to stop sprinkling). Specifically, the sprinkling controller 92 instructs the water supply pump 68 of the sprinkling device 60 to stop driving, and instructs the water control valve 69 to close. As a result, the sprinkling of water from the sprinkler 61 into the duct gas passage 36 is stopped, and the sprinkling step (S26) is completed.

[0048] As described above, after the fuel control valve 25 is closed, the ammonia in the portion of the ammonia line 22 closer to the combustor 15 than the fuel control valve 25 and in the fuel nozzle 15n of the combustor 15 is pushed into the combustion tube 15c by the purge gas. This ammonia is exhausted from the gas turbine 10 without being burned. This ammonia flows in the duct gas flow path 36 in the duct 31 of the exhaust heat recovery boiler 30. In this embodiment, as described above, the gas turbine controller 91 instructs the fuel control valve 25 to stop the supply of ammonia (S21) and starts sprinkling water (S26). Therefore, during the process of stopping the supply of ammonia to the combustor 15, the ammonia exhausted from the gas turbine 10 is absorbed into the water droplets from the sprinkler 61. The water droplets that have absorbed the ammonia are collected in the mist eliminator 70, and then collected in the lower part of the duct 31, and are returned to the water tank 62 via the water recovery line 71.

[0049] As described above, the point in time when the purge gas control valve 27 is closed is the point in time when almost no gas has been exhausted from the turbine casing. Therefore, in this embodiment, after a predetermined time has elapsed since the instruction to stop the ammonia supply was received and the purge control valve is closed, the sprinkler 61 stops sprinkling water into the duct gas passage 36.

[0050] As described above, in the process of starting the supply of ammonia to the combustor 15 and in the process of stopping the supply of ammonia to the combustor 15, unburned ammonia is exhausted from the gas turbine 10. In this embodiment, when unburned ammonia is exhausted from the gas turbine 10 in these processes, water is sprayed into the duct gas flow passage 36 by the sprinkler device 60, and the ammonia is absorbed in the water. Therefore, in this embodiment, it is possible to suppress the emission of ammonia to the outside.

[0051] Second Embodiment Hereinafter, a second embodiment of the gas turbine facility according to the present disclosure will be described with reference to FIGS.

[0052] As shown in Fig. 4, the gas turbine facility of this embodiment includes a gas turbine 10, an ammonia supplying device 20, a heat recovery steam generator 30, a steam turbine 41, a condenser 43, a pump 45, a chimney 33, a denitrification device 50, a sprinkling device 60a, a water recovery line 71a, an ammonia water supplying device 74, and a control device 90, similar to the gas turbine facility of the first embodiment. However, the sprinkling device 60a of this embodiment is different from the sprinkling device 60 of the first embodiment. In this respect, the water recovery line 71a of this embodiment is also different from the water recovery line 71 of the first embodiment. In addition, the gas turbine facility of this embodiment does not include the mist eliminator 70 in the gas turbine facility of the first embodiment.

[0053] The sprinkler 60a of this embodiment has a sprinkler 61a, a water tank 62, and a water supply device 66, similar to the sprinkler 60 of the first embodiment. However, the sprinkler 61a of this embodiment is different in arrangement and configuration from the sprinkler 61 of the first embodiment. The sprinkler 61a of this embodiment is arranged not in the duct 31 of the heat recovery boiler 30 but in the chimney 33, in other words, in the chimney gas flow path 37. As shown in FIG. 5, this sprinkler 61a has an annular ring header 61h along the inner peripheral surface of the chimney 33 and a plurality of nozzles 61n provided on the inner peripheral side of this ring header 61h. The ring header 61h is connected to a water line 67 extending from a water tank 62 (see FIG. 4). The plurality of nozzles 61n are provided so that the water supplied to the ring header 61h can be sprinkled toward the inner peripheral side of the annular ring header 61h in a direction having a horizontal component.

[0054] 4, one end of the water recovery line 71a is connected to a position lower than the position where the sprinkler 61a is disposed in the chimney 33. The other end of the water recovery line 71a is connected to the water tank 62, similar to the other end of the water recovery line 71 in the first embodiment.

[0055] The control device 90 of this embodiment has a configuration similar to that of the control device 90 of the first embodiment, and includes a gas turbine controller 91 and a sprinkling controller 92. Moreover, the control device 90 of this embodiment operates similarly to the control device 90 of the first embodiment. Therefore, in the process of starting the supply of ammonia to the combustor 15, the gas turbine controller 91 and the sprinkling controller 92 operate as shown in the flowchart of Fig. 2. Moreover, in the process of stopping the supply of ammonia to the combustor 15, the gas turbine controller 91 and the sprinkling controller 92 operate as shown in the flowchart of Fig. 3.

[0056] In this embodiment, similarly to the first embodiment, when unburned ammonia is exhausted from the gas turbine 10 during the process of starting the supply of ammonia to the combustor 15 and during the process of stopping the supply of ammonia to the combustor 15, water is sprayed into the stack gas passage 37 by the water sprinkler 60a to absorb the ammonia. Therefore, in this embodiment, it is possible to suppress the exhaust of ammonia to the outside.

[0057] In this embodiment, the particle size of the water droplets sprayed from the sprinkler 61a is set to have a settling velocity equal to or greater than the ascending velocity of the exhaust gas flowing through the chimney 33 so that the water droplets sprayed from the sprinkler 61a are not discharged outside the chimney 33. Therefore, in this embodiment, the water droplets do not substantially flow downstream (upper side) in the gas flow direction from the sprinkler 61a, and there is no need to place the mist eliminator 70 downstream in the gas flow direction from the sprinkler 61a as in the first embodiment. Therefore, in this embodiment, the pressure loss in the exhaust gas flow path 35 can be suppressed more than in the first embodiment. However, since it is necessary to make the particle size of the water droplets in this embodiment larger than that of the first embodiment, the ammonia absorption efficiency is lower than that of the first embodiment.

[0058] That is, the present embodiment has an advantage of being able to suppress pressure loss in the exhaust gas flow path 35 more than the first embodiment, but has a disadvantage of having a lower ammonia absorption efficiency than the first embodiment. In other words, the first embodiment has an advantage of having a higher ammonia absorption efficiency than the present embodiment, but has a disadvantage of having a higher pressure loss in the exhaust gas flow path 35 than the present embodiment. For this reason, it is preferable to decide which of the sprinkler 61 of the first embodiment and the sprinkler 61a of the present embodiment to adopt by comparing the advantages and disadvantages of both.

[0059] This embodiment is an example in which a sprinkler 61a is provided inside the chimney 33, and a mist eliminator is not provided downstream (above) of the sprinkler 61a. However, the sprinkler 61a may be provided inside the chimney 33, and a mist eliminator may be provided downstream (above) of the sprinkler 61a.

[0060] "Third embodiment" Hereinafter, a third embodiment of a gas turbine facility according to the present disclosure will be described with reference to FIG.

[0061] As shown in Fig. 6, the gas turbine equipment of this embodiment includes a gas turbine 10, an ammonia supplying device 20, a heat recovery steam generator 30, a steam turbine 41, a condenser 43, a pump 45, a chimney 33, a denitrification device 50, a sprinkler device 60, a water recovery line 71, and a control device 90, similar to the gas turbine equipment of the first embodiment. However, the gas turbine equipment of this embodiment does not include the ammonia water supplying device 74 in the gas turbine equipment of the first embodiment. The gas turbine equipment of this embodiment includes a treated water supplying device 77 instead of the ammonia water supplying device 74. Furthermore, the gas turbine equipment of this embodiment includes an acid supplying device 80.

[0062] The acid supply device 80 includes an acid tank 81 capable of storing an aqueous solution of an acid that generates a salt by reacting with ammonia, an acid line 82 connecting the acid tank 81 and the water tank 62, and an acid supply pump 83 and an acid control valve 84 provided in the acid line 82. Examples of the aqueous solution of an acid that generates a salt by reacting with ammonia include an aqueous hydrochloric acid solution and an aqueous sulfuric acid solution. The salt generated by the reaction of ammonia with an aqueous hydrochloric acid solution is ammonium chloride, and the salt generated by the reaction of ammonia with an aqueous sulfuric acid solution is ammonium sulfate. The water tank 62 is also connected to a water recovery line 71 and a make-up water line 63, as in the first embodiment. The water tank 62 is provided with a salt amount detector 65 capable of detecting the amount of salt in the water tank 62, instead of the ammonia concentration meter 64 in the first embodiment. The salt amount detector 65 may be, for example, a detector that detects the concentration of salt in the water tank 62, or may be a detector that indirectly detects the amount of salt in the water tank 62 by detecting the pH of the water in the water tank 62.

[0063] The treated water supply device 77 can guide the water in the water tank 62 to the wastewater treatment device 89. This treated water supply device 77 has a treated water line 78, a treated water adjustment valve 79, and the water supply pump 68 of the sprinkler device 60. The treated water line 78 connects the wastewater treatment device 89 to a position in the water line 67 of the sprinkler device 60 that is closer to the sprinkler 61 than the water supply pump 68 and closer to the water tank 62 than the water adjustment valve 69. The treated water adjustment valve 79 is provided in this treated water line 78. The water supply pump 68 is one of the components of this treated water supply device 77 and is also one of the components of the sprinkler device 60.

[0064] The control device 90 of this embodiment has a configuration similar to that of the control device 90 of the first embodiment, and includes a gas turbine controller 91 and a sprinkling controller 92. Moreover, the control device 90 of this embodiment operates similarly to the control device 90 of the first embodiment. Therefore, in the process of starting the supply of ammonia to the combustor 15, the gas turbine controller 91 and the sprinkling controller 92 operate as shown in the flowchart of Fig. 2. Moreover, in the process of stopping the supply of ammonia to the combustor 15, the gas turbine controller 91 and the sprinkling controller 92 operate as shown in the flowchart of Fig. 3.

[0065] In this embodiment, acid is added to the water supplied to the sprinkler 61. Thus, the water sprinkled from the sprinkler 61 becomes weakly acidic. Therefore, in this embodiment, the absorption efficiency of ammonia in the exhaust gas flow path 35 can be increased. The water that absorbs ammonia contains salt generated by the reaction between ammonia and acid. The water containing ammonia and salt accumulates in the lower part of the duct 31 and returns to the water tank 62 via the water recovery line 71. The salt amount detector 65 detects the amount of salt in the water in the water tank 62. When the amount of salt detected by the salt amount detector 65 exceeds a predetermined value, the water supply pump 68 is driven, the treated water control valve 79 is opened, and the salt-containing water is sent to the wastewater treatment device 89 via the treated water line 78. Thereafter, water is replenished from the make-up water line 63 into the water tank 62, and an acid aqueous solution is supplied from the acid supply device 80 into the water tank 62.

[0066] Although this embodiment is a modification of the first embodiment, the second embodiment may also be modified like this embodiment. That is, the second embodiment may also include a treated water supplying device 77 instead of the ammonia water supplying device 74 in the gas turbine facility of the second embodiment, and may further include an acid supplying device 80.

[0067] "Additional Notes" The gas turbine facility in the above embodiment can be understood, for example, as follows.

[0068] (1) A gas turbine facility according to a first aspect, The system includes a gas turbine 10 having a combustor 15, an ammonia supplying device 20 supplying ammonia to the combustor 15, a flow path forming frame 34 forming an exhaust gas flow path 35 through which exhaust gas from the gas turbine 10 flows, sprinkler devices 60, 60a arranged in the exhaust gas flow path 35 and having sprinklers 61, 61a capable of sprinkling water into the exhaust gas flow path 35, and a sprinkler controller 92 controlling the operation of the sprinkler devices 60, 60a. The sprinkler controller 92 instructs the sprinkler devices 60, 60a to start sprinkling water on condition that an instruction to start supplying ammonia to the combustor 15 from the ammonia supplying device 20 or an instruction to stop supplying ammonia is received.

[0069] The ammonia supplying device 20 generally has an ammonia line 22 through which ammonia flows as fuel, and a fuel control valve 25 provided in the ammonia line 22. In the process of starting the supply of ammonia from the ammonia supplying device 20 to the combustor 15, the portion of the ammonia line 22 closer to the combustor 15 than the fuel control valve 25 and the inside of the fuel nozzle 15n of the combustor 15 are filled with ammonia, and the ammonia starts to be injected into the combustion tube 15c of the combustor 15. After that, the ammonia in the combustion tube 15c is ignited. The ammonia that flows out from the fuel control valve 25 during the period from when the fuel control valve 25 receives an instruction to start supplying ammonia and opens the fuel control valve 25 until when the ammonia in the combustion tube 15c is ignited is exhausted from the gas turbine 10 without being burned. This ammonia flows in the exhaust gas flow path 35. Furthermore, in the process of stopping the supply of ammonia to the combustor 15, the fuel control valve 25 receives an instruction to stop the supply of ammonia, and after this fuel control valve 25 closes, the ammonia in the portion of the ammonia line 22 on the combustor 15 side from the fuel control valve 25 and in the fuel nozzle 15n of the combustor 15 flows out into the combustion liner 15c. This ammonia is also exhausted from the gas turbine 10 without being combusted.

[0070] When the sprinkler controller 92 of this embodiment receives an instruction to start or stop the supply of ammonia, it instructs the sprinkler devices 60, 60a to start sprinkling water. As a result, the sprinklers 61, 61a start sprinkling water into the exhaust gas flow path 35, and the ammonia flowing in the exhaust gas flow path 35 is absorbed by this water.

[0071] Therefore, in this embodiment, it is possible to suppress the discharge of ammonia to the outside during the process of starting the supply of ammonia from the ammonia supply device 20 to the combustor 15 or during the process of stopping the supply of ammonia.

[0072] (2) A gas turbine facility according to a second aspect of the present invention comprises: In the gas turbine facility according to the first aspect, the sprinkler controller 92 instructs the sprinkler devices 60, 60a to stop sprinkling water after a predetermined time has elapsed since the ammonia supply start instruction or the ammonia supply stop instruction was received. The end point of the predetermined time is a point after the point at which unburned ammonia is expected to cease to be exhausted from the gas turbine 10.

[0073] In this embodiment, water is sprinkled into the exhaust gas flow passage 35 by the sprinklers 60, 60a from the time when unburned ammonia starts to be exhausted from the gas turbine 10 until the time when it is assumed that unburned ammonia will no longer be exhausted from the gas turbine 10, and the ammonia in the exhaust gas flow passage 35 is absorbed by this water. Then, after the time when it is assumed that unburned ammonia will no longer be exhausted from the gas turbine 10, the sprinklers 60, 60a stop sprinkling water into the exhaust gas flow passage 35. Thus, in this embodiment, the driving time of the sprinklers 60, 60a can be limited, and the driving power of the sprinklers 60, 60a and the consumption of water to be sprinkled can be reduced.

[0074] (3) A gas turbine facility according to a third aspect, The gas turbine facility in the first or second aspect further includes a water recovery line that guides liquid containing water sprayed into the exhaust gas flow passage to the outside of the flow passage forming frame.

[0075] The water that is sprayed from the sprinklers 61, 61a into the exhaust gas flow passage 35 and has absorbed ammonia accumulates in the exhaust gas flow passage 35. In this embodiment, this water is guided to the outside of the flow passage forming frame 34 by the water recovery lines 71, 71a.

[0076] (4) A gas turbine facility according to a fourth aspect includes: The gas turbine facility in the third aspect further includes a mist eliminator 70 capable of collecting mist. The flow passage forming frame 34 has a duct 31 connected to the gas turbine 10. The duct 31 is formed with a duct gas flow passage 36 forming at least a part of the exhaust gas flow passage 35. The sprinkler 61 is disposed in the duct gas flow passage 36 and configured to be able to sprinkle water toward the downstream side of the flow of the exhaust gas in the duct gas flow passage 36. The mist eliminator 70 is disposed in the duct gas flow passage 36 and downstream of the sprinkler 61. The water recovery line 71 is connected in the duct 31 to a position downstream of the mist eliminator 70 in the flow direction of the exhaust gas, or to a region where the mist eliminator 70 is disposed in the flow direction of the exhaust gas.

[0077] In this embodiment, the ammonia flowing in the duct gas flow passage 36 is absorbed by water droplets sprayed from a water sprinkler 61 arranged in the duct gas flow passage 36. The water droplets that have absorbed the ammonia and flowed downstream in the duct gas flow passage 36 are collected by the mist eliminator 70. The water droplets collected in the mist eliminator 70 accumulate in the duct 31. The water that has accumulated in the duct 31 is led to the outside of the duct 31 by a water recovery line 71.

[0078] (5) A gas turbine facility according to a fifth aspect includes: In the gas turbine facility of the third aspect, the flow passage forming frame 34 has a duct 31 connected to the gas turbine 10 and a chimney 33 connected to the duct 31. The chimney 33 has a chimney gas flow passage 37 that forms at least a part of the exhaust gas flow passage 35 and extends in a vertical direction. The sprinkler 61a is disposed in the chimney gas flow passage 37 and is configured to be able to sprinkle water in a direction having a horizontal component. The water recovery line 71a is connected to a position in the chimney 33 that is lower than the position where the sprinkler 61a is disposed.

[0079] In this embodiment, the ammonia flowing in the stack gas passage 37 is absorbed by water droplets sprayed from the water sprinklers 61, 61a arranged in the stack gas passage 37. The water droplets that have absorbed the ammonia accumulate in the stack 33. This water is guided to the outside of the stack 33 by the water recovery line 71a.

[0080] (6) A gas turbine facility according to a sixth aspect, In the gas turbine facility according to any one of the third to fifth aspects, the sprinkler system 60, 60a includes a water tank 62 capable of storing water to be sprinkled in the exhaust gas flow path 35, and a water supply device 66 capable of supplying the water in the water tank 62 to the sprinklers 61, 61a. The sprinkler controller 92 controls the water supply device 66.

[0081] (7) A gas turbine facility according to a seventh aspect, The gas turbine facility in the sixth aspect further includes a denitration device 50 that is disposed in the exhaust gas flow passage 35 upstream of the sprinklers 61, 61a in the flow direction of the exhaust gas and that removes nitrogen oxides from the exhaust gas, and an ammonia water supply device 74 that can supply water in the water tank 62 to the denitration device 50. The water recovery lines 71, 71a are connected to the water tank 62. The water tank 62 is provided with an ammonia concentration meter 64 that can detect the ammonia concentration in the water tank 62. The ammonia water supply device 74 supplies the water in the water tank 62 to the denitration device 50 when the ammonia concentration detected by the ammonia concentration meter 64 becomes equal to or higher than a predetermined concentration.

[0082] When water is repeatedly sprayed into the exhaust gas flow path 35 and the water absorbing the ammonia returns to the water tank 62 each time, the ammonia concentration in the water in the water tank 62 gradually increases. The ammonia concentration in the water tank 62 is detected by the ammonia concentration meter 64. When the ammonia concentration detected by the ammonia concentration meter 64 is equal to or higher than a predetermined concentration and the denitration process of the denitration device 50 is required, the water in the water tank 62 containing ammonia is supplied to the denitration device 50 by the ammonia water supply device 74. The denitration device 50 uses the ammonia water to decompose NOx contained in the exhaust gas into nitrogen and water vapor. Therefore, in this embodiment, the amount of ammonia water used for the denitration process from the ammonia water supply source can be reduced.

[0083] (8) A gas turbine facility according to an eighth aspect includes: The gas turbine facility in the sixth aspect further includes an acid supplying device 80 capable of supplying an acid that reacts with the ammonia to produce a salt into the water tank 62, and a treated water supplying device 77 capable of directing the water in the water tank 62 to a wastewater treatment device 89. The water recovery lines 71, 71a are connected to the water tank 62. The water tank 62 is provided with a salt amount detector 65 capable of detecting the amount of salt in the water tank 62. The treated water supplying device 77 directs the water in the water tank 62 to the wastewater treatment device 89 when the amount of salt detected by the salt amount detector 65 becomes equal to or greater than a predetermined amount.

[0084] When the acid from the acid supply device 80 is supplied to the water supplied to the sprinklers 61, 61a, the water sprinkled from the sprinklers 61, 61a becomes weakly acidic. Therefore, in this embodiment, the absorption efficiency of ammonia in the exhaust gas flow path 35 can be increased. The water that has absorbed ammonia contains salt generated by the reaction between the ammonia and the acid. The water containing the ammonia and salt returns to the water tank 62 via the water recovery lines 71, 71a. The salt amount detector 65 detects the amount of salt in the water in the water tank 62. When the amount of salt detected by the salt amount detector 65 reaches or exceeds a predetermined value, the salt-containing water is sent to the wastewater treatment device 89 by the treated water supply device 77.

[0085] The method for suppressing ammonia emission from a gas turbine facility in each of the above embodiments can be understood, for example, as follows. (9) The method for suppressing ammonia emissions from a gas turbine facility according to a ninth aspect is applied to the following gas turbine facility. The gas turbine facility includes a gas turbine 10 having a combustor 15, an ammonia supplying device 20 that supplies ammonia to the combustor 15, and a flow passage forming frame 34 that forms an exhaust gas flow passage 35 through which exhaust gas from the gas turbine 10 flows. In the ammonia emission suppression method according to this embodiment, a water sprinkling step S16 is executed to sprinkle water into the exhaust gas flow path 35. In the water sprinkling step S16, sprinkling of water into the exhaust gas flow path 35 is started on the condition that an instruction to start supplying ammonia or an instruction to stop supplying ammonia to the combustor 15 is received from the ammonia supply device 20.

[0086] In this embodiment, similarly to the gas turbine equipment in the first embodiment, when an instruction to start the supply of ammonia or an instruction to stop the supply of ammonia are received, water spraying is started in the exhaust gas passage 35. The ammonia flowing in the exhaust gas passage 35 is absorbed in this water. Therefore, similarly to the gas turbine equipment in the first embodiment, in this embodiment, it is possible to suppress the emission of ammonia to the outside during the process of starting the supply of ammonia from the ammonia supply device 20 to the combustor 15 or during the process of stopping the supply of ammonia.

[0087] (10) A method for suppressing ammonia emissions from a gas turbine facility according to a tenth aspect, In the method for suppressing ammonia emission from a gas turbine facility according to the ninth aspect, in the water sprinkling step S16, after a predetermined time has elapsed since the instruction to start supplying ammonia or the instruction to stop supplying ammonia was received, the water sprinkling into the exhaust gas flow path 35 is stopped. The end point of the predetermined time is a point after the point at which it is assumed that unburned ammonia will no longer be exhausted from the gas turbine 10.

[0088] In this embodiment, similarly to the gas turbine facility in the second embodiment, the execution time of the water sprinkling process S16 can be limited, and the consumption of the power required to execute the water sprinkling process S16 and the amount of water to be sprinkled can be reduced. [Explanation of symbols]

[0089] 10: Gas turbine 11: Gas turbine rotor 12: Intermediate casing 14: Compressor 14r: Compressor rotor 14c: Compressor casing 15: Combustor 15c: Combustion tube (or transition tube) 15n: Fuel nozzle 15i: Spark plug 16: Turbine 16r: Turbine rotor 16c: Turbine casing 20: Ammonia supply device 21: Ammonia tank 22: Ammonia line 23: Ammonia pump 24: Carburetor 25: Fuel control valve 26: Purge gas line 27: Purge gas control valve 30: Waste heat recovery boiler 31: Duct 32: Heat transfer tube 33: Chimney 34: Flow path forming frame 35: Exhaust gas flow path 36: Duct gas flow path 37: Chimney gas flow path 41: Steam turbine 42: Main steam line 43: Condenser 44: Water supply line 45: Pump 50: Denitration equipment 51: Catalyst layer 52: Ammonia dispenser 53: Ammonia water supply line 54: Ammonia water control valve 60, 60a: Water sprinkler 61, 61a: Water sprinkler 61h: Ring header 61n: Nozzle 62: Water tank 63: Make-up water line 64: Ammonia concentration meter 65: Salt detector 66:Water supply device 67: Water line 68: Water supply pump 69: Water control valve 70: Mist Eliminator 71, 71a: Water recovery line 74: Ammonia water supply device 75: Ammonia water subline 76: Ammonia water sub-control valve 77: Treated water supply equipment 78: Treated water line 79: Treated water control valve 80: Acid supply device 81: Acid tank 82: Acid Line 83: Acid supply pump 84: Acid control valve 89: Wastewater treatment equipment 90: Control device 91: Gas turbine controller 92: Watering controller

Claims

1. An internal combustion engine that burns fuel; an ammonia supply device that supplies ammonia as fuel to the internal combustion engine; an ammonia emission suppression means for suppressing the emission of ammonia to the outside; Equipped with The ammonia emission suppression means includes a sprinkler device. A combustion system comprising:

2. The ammonia discharge suppression means causes the ammonia to be absorbed into water by sprinkling water onto the gas containing ammonia using the sprinkler device.

2. The combustion system of claim 1.

3. The sprinkler device has a sprinkler that is disposed in an exhaust gas flow path through which exhaust gas from the internal combustion engine flows and can sprinkle water into the exhaust gas flow path.

2. The combustion system of claim 1.

4. The sprinkling device has a tank that can collect and store ammonia absorbed by water through sprinkling as ammonia water. A combustion system according to any one of claims 1 to 3.

5. The sprinkler device sprinkles water or ammonia water in the tank, recovers the ammonia water that has absorbed ammonia through the sprinkling, and stores the ammonia water in the tank.

5. The combustion system of claim 4.

6. a denitration device that is disposed upstream of the ammonia emission suppression means in a flow direction of the exhaust gas and removes nitrogen oxides from the exhaust gas; The combustion system according to any one of claims 1 to 5, comprising:

7. a denitration device that is disposed upstream of the ammonia emission suppression means in a flow direction of the exhaust gas and removes nitrogen oxides from the exhaust gas; an ammonia water supply line capable of supplying the ammonia water stored in the tank to the denitrification device; 6. The combustion system according to claim 4 or 5, comprising:

8. a denitration device that is disposed upstream of the ammonia emission suppression means in a flow direction of the exhaust gas and removes nitrogen oxides from the exhaust gas; an ammonia water supplying device capable of supplying the ammonia water stored in the tank to the denitrification device; Equipped with The sprinkler device sprinkles water or the ammonia water in the tank onto the exhaust gas, the ammonia water supplying device supplies the ammonia water in the tank to the denitration device when the ammonia concentration of the ammonia water stored in the tank becomes equal to or higher than a predetermined concentration.

6. A combustion system according to claim 4 or 5.

9. The denitrification device uses the ammonia water supplied from the tank to decompose NOx contained in the exhaust gas into nitrogen and water vapor through the action of a catalyst.

9. A combustion system according to claim 7 or 8.

10. The ammonia supply device has an ammonia line for supplying ammonia as a fuel, one end of a purge gas line for supplying a purge gas from a purge gas supply source is connected to the ammonia line; The combustion system according to any one of claims 1 to 9, characterized in that the sprinkler device sprinkles water on the purged ammonia and recovers it as ammonia water.

11. A combustion device that burns fuel; an ammonia supply device that supplies ammonia as fuel to the combustion device; A heat exchange means for heating water with heat generated by the combustion of fuel to change the state of the water to steam; an ammonia emission suppression means for suppressing the emission of ammonia to the outside; Equipped with The ammonia emission suppression means includes a sprinkler device. A combustion system comprising:

12. The ammonia discharge suppression means causes the ammonia to be absorbed into water by sprinkling water onto the gas containing ammonia using the sprinkler device. The combustion system of claim 11 .

13. The sprinkler device has a sprinkler that is arranged in an exhaust gas flow path through which exhaust gas from the combustion device flows and can sprinkle water into the exhaust gas flow path. The combustion system of claim 11 .

14. The sprinkling device has a tank that can collect and store ammonia absorbed by water through sprinkling as ammonia water. Combustion system according to any one of claims 11 to 13.

15. The sprinkler device sprinkles water or ammonia water in the tank, recovers the ammonia water that has absorbed ammonia through the sprinkling, and stores the ammonia water in the tank.

15. The combustion system of claim 14.

16. a denitration device that is disposed upstream of the ammonia emission suppression means in a flow direction of the exhaust gas and removes nitrogen oxides from the exhaust gas; A combustion system according to any one of claims 11 to 15, comprising:

17. a denitration device that is disposed upstream of the ammonia emission suppression means in a flow direction of the exhaust gas and removes nitrogen oxides from the exhaust gas; an ammonia water supply line capable of supplying the ammonia water stored in the tank to the denitrification device; 16. A combustion system according to claim 14 or 15, comprising:

18. a denitration device that is disposed upstream of the ammonia emission suppression means in a flow direction of the exhaust gas and removes nitrogen oxides from the exhaust gas; an ammonia water supplying device capable of supplying the ammonia water stored in the tank to the denitrification device; Equipped with The sprinkler device sprinkles water or the ammonia water in the tank onto the exhaust gas, the ammonia water supplying device supplies the ammonia water in the tank to the denitration device when the ammonia concentration of the ammonia water stored in the tank becomes equal to or higher than a predetermined concentration.

16. A combustion system according to claim 14 or 15.

19. The denitrification device uses the ammonia water supplied from the tank to decompose NOx contained in the exhaust gas into nitrogen and water vapor through the action of a catalyst.

19. A combustion system according to claim 17 or 18.

20. 1. A gas turbine facility comprising: a gas turbine having a combustor; and an ammonia emission suppression means for suppressing ammonia supplied to the combustor before combustion begins in the combustor or after a misfire, from being discharged to the outside, wherein the ammonia emission suppression means includes a water sprinkler.

21. 1. A gas turbine facility comprising: a gas turbine having a combustor; and an ammonia emission suppression means for recovering ammonia flowing in an exhaust gas flow passage before combustion in the combustor begins or after a misfire, wherein the ammonia emission suppression means includes a water sprinkler.

22. The sprinkler device has a sprinkler disposed in the exhaust gas flow path and capable of sprinkling water into the exhaust gas flow path.

22. Gas turbine installation according to claim 21.

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