JP7060996B2 - Combustion equipment, gas turbines and power generation equipment - Google Patents

Description

The present invention relates to a combustion device, a gas turbine and a power generation device.

The following Patent Document 1 describes a combustor, an ammonia vaporizer that generates gaseous ammonia that vaporizes liquid ammonia and supplies it as fuel to the combustor, an ammonia supply device that supplies liquid ammonia to the ammonia vaporizer, and a combustor. A combustion device, a gas turbine, and a power generation device including an exhaust system for exhausting combustion exhaust gas to the outside are disclosed.

JP-A-2015-190466

By the way, in the above-mentioned conventional technique, gaseous ammonia may remain in the pipe (fuel gas pipe) between the ammonia vaporizer and the combustor. For example, when the equipment is started up, a leak check is performed on the fuel gas pipe using gaseous ammonia, and the gaseous ammonia used for this leak check is taken out from the fuel gas pipe via the degassing pipe and treated as industrial waste. .. That is, since a part of the fuel is discarded in the prior art, there is a problem that the fuel utilization rate is reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the utilization rate of ammonia as a fuel as compared with the conventional invention.

In order to achieve the above object, in the present invention, as a first solution relating to a combustion device, a combustor, an ammonia supply unit that supplies gaseous ammonia as a fuel to the combustor, and a combustion gas of the combustor are provided. The ammonia supply unit includes an exhaust unit for exhausting, a gas recovery unit for recovering the gaseous ammonia discharged to the outside of the system, and a recovery gas supply unit for supplying the ammonia of the gas recovery unit to the combustor. , Is adopted.

In the present invention, as a second solution relating to the combustion device, in the first solution, the exhaust unit includes a denitration device for denitrifying the combustion gas, and the ammonia is supplied to the denitration device. The means of further providing the recovered gas supply unit of No. 2 is adopted.

In the present invention, as a third solution relating to the combustion device, in the first solution, the exhaust unit is provided with a denitration device for denitrifying the combustion gas, and the recovered gas supply unit is replaced with the exhaust unit. A means of providing a second recovered gas supply unit for supplying ammonia to the denitration device is adopted.

In the present invention, as a fourth solution according to the combustion apparatus, in any one of the first to third solutions, the gas recovery unit recovers the gaseous ammonia to generate ammonia water, and the recovery is performed. The gas supply unit and / and the second recovered gas supply unit employ a means of supplying the ammonia water as the ammonia to the combustor and / and the denitration device.

In the present invention, as a fifth solution according to the combustion apparatus, in the fourth solution, the gas recovery unit takes in a part of the gaseous ammonia from the ammonia supply unit to obtain a predetermined concentration of ammonia water. Is adopted.

In the present invention, as a sixth solution relating to the combustion apparatus, in the fifth solution, the gas recovery unit recovers the gaseous ammonia to generate ammonia water, and receives from the recovery tank. A means of providing a adjusting tank for adjusting the ammonia water to a predetermined concentration by adding the gaseous ammonia to the ammonia water is adopted.

In the present invention, as a seventh solution relating to the combustion device, in the second or third solution, a third recovery method in which a part of the gaseous ammonia remaining in the ammonia supply unit is supplied to the denitration device. Adopt a means of further providing a gas supply unit.

In the present invention, as an eighth solution relating to a combustion device, in any one of the first to seventh solutions, a vaporizer that vaporizes liquid ammonia to generate the gaseous ammonia and the ammonia supply unit are used. A means is adopted in which a fourth recovered gas supply unit for supplying a part of the residual gaseous ammonia to the vaporizer is further provided.

Further, in the present invention, as a solution means for the gas turbine, a means for providing a combustion device according to any one of the first to eighth solutions is adopted.

Further, in the present invention, as a solution means for the power generation device, a means for using a gas turbine according to the above solution as a power source is adopted.

According to the present invention, it is possible to improve the utilization rate of ammonia as a fuel as compared with the conventional case.

It is a system block diagram which shows the structure of the combustion apparatus, the gas turbine and the power generation apparatus which concerns on one Embodiment of this invention. It is a system block diagram which shows the structure of the combustion apparatus, the gas turbine and the power generation apparatus which concerns on 1st modification of 1 Embodiment of this invention. It is a system block diagram which shows the structure of the combustion apparatus, the gas turbine and the power generation apparatus which concerns on the 2nd modification of one Embodiment of this invention. It is a system block diagram which shows the structure of the combustion apparatus, the gas turbine and the power generation apparatus which concerns on the 3rd modification of one Embodiment of this invention. It is a system block diagram which shows the structure of the combustion apparatus, the gas turbine and the power generation apparatus which concerns on 4th modification of 1 Embodiment of this invention. It is a system block diagram which shows the structure of the combustion apparatus, the gas turbine and the power generation apparatus which concerns on 5th modification of one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the power generation device P according to the present embodiment includes a gas turbine 1 and a generator 2, and generates electricity by driving the generator 2 with the gas turbine 1 as a power source.

The gas turbine 1 includes a compressor 3, a turbine 4, and a combustion device 5, and is a prime mover for rotationally driving the generator 2. The generator 2 is rotated by the power of the gas turbine 1 to generate predetermined AC power (for example, three-phase AC power) and output it to the outside. The combustion device 5 includes a combustor 6, an ammonia supply unit 7, a city gas supply unit 8, and an exhaust unit 9. The system defined in the present invention includes a tank 7a, a combustor 6, and an ammonia supply pipe 7b (including a vaporizer 7c, the first on-off valve 7d, a second on-off valve 7e, and a first control valve 7f). Is assumed.

The compressor 3 is, for example, an axial compressor, and compresses air (normal pressure) supplied from an intake system (not shown) and supplies it to the combustor 6. As shown in the figure, the turbine 4 is an axial flow turbine axially coupled to the compressor 3 and the generator 2, and generates rotational power based on the combustion gas supplied from the combustor 6 to generate the compressor 3 and the generator 2. It is driven to rotate. The turbine 4 supplies the combustion gas after power recovery to the exhaust unit 9.

The combustion device 5 is a device that generates combustion gas by burning (co-firing) gaseous ammonia and city gas as fuel in the combustor 6. The combustor 6 is composed of a combustion chamber having a predetermined capacity and a predetermined shape, a burner attached to the combustion chamber, and the like, and the compressed air supplied from the compressor 3 is used as an oxidizing agent to mix and burn gaseous ammonia and city gas. The high-temperature and high-pressure combustion gas generated by combustion is output to the turbine 4.

Here, as is well known, ammonia is a compound (NH ₃ ) of hydrogen (H) and nitrogen (N), and is a colorless gas at normal temperature and pressure. Such ammonia is commercially available as aqueous ammonia (ammonium hydroxide) because of its good water solubility, and its concentration is, for example, 10% or 25%. In the present embodiment, an ammonia solution having a purity of 99.9% or more is referred to as liquid ammonia, and a vaporized version of this liquid ammonia is referred to as gaseous ammonia. Further, ammonium hydroxide having a predetermined concentration (for example, 25%) is called ammonia water.

As shown in the figure, the ammonia supply unit 7 includes a tank 7a, an ammonia supply pipe 7b, a vaporizer 7c, a first on-off valve 7d, a second on-off valve 7e, a first control valve 7f, a gas vent pipe 7g, and a third on-off valve 7h. , Ammonia control pipe 7i, 2nd control valve 7j, recovery tank 7k (gas recovery part), adjustment tank 7m, 1st gas supply pipe 7n, 3rd control valve 7p (recovery gas supply part), 2nd gas supply pipe 7q A fourth control valve 7r (recovery gas supply unit), a water supply pipe 7s, and a water supply pump 7t are provided, and gaseous ammonia is supplied to the combustor 6 as fuel.

The tank 7a is a container for storing a predetermined capacity of liquid ammonia, and supplies liquid ammonia to the ammonia supply pipe 7b. The ammonia supply pipe 7b is a pipe provided between the output port of the tank 7a and the fuel inlet of the combustor 6, and the inside is a flow path through which liquid ammonia or gaseous ammonia flows.

Here, in the ammonia supply pipe 7b, a booster pump (not shown) that boosts the liquid ammonia in the tank 7a and supplies it to the ammonia supply pipe 7b is provided in the vicinity of the tank 7a. The liquid ammonia is pressurized by the booster pump, and the liquid ammonia is vaporized by the vaporizer 7c. By boosting the pressure with a booster pump, the pressure becomes higher than that of the combustor, so that gaseous ammonia can be sent to the combustor without using a pump for pumping. A buffer tank (not shown) may be provided between the vaporizer 7c and the first on-off valve 7d, and the buffer tank may be sent downstream from the first on-off valve 7d.

The vaporizer 7c vaporizes liquid ammonia using a predetermined heat medium to generate the gaseous ammonia, and outputs the gaseous ammonia toward the first on-off valve 7d.

The first on-off valve 7d is provided in the middle of the ammonia supply pipe 7b and opens and closes the ammonia flow path which is the internal space of the ammonia supply pipe 7b. The second on-off valve 7e is provided in the rear stage (downstream side) of the first on-off valve 7d in the ammonia supply pipe 7b, and opens and closes the ammonia flow path of the ammonia supply pipe 7b. The first control valve 7f is provided in the rear stage (downstream side) of the second on-off valve 7e in the ammonia supply pipe 7b. The first control valve 7f is automatically controlled by a plant control device (not shown) to automatically adjust the flow rate of gaseous ammonia in the ammonia supply pipe 7b.

In the ammonia supply pipe 7b of the present embodiment, the portion between the first on-off valve 7d and the second on-off valve 7e is a target portion of the gas leak check (leak check) of the ammonia supply pipe 7b, and the leak check pipe and the portion. To tell. In this embodiment, the residual ammonia remaining in the leak check pipe is treated as gaseous ammonia discharged to the outside of the combustion device 5.

The degassing pipe 7g is a pipe branched from the leak check pipe, one end of which is connected between the first on-off valve 7d and the second on-off valve 7e of the leak check pipe, and the other end of which is a recovery tank. It is connected to a 7k gas inlet. The third on-off valve 7h is provided in the middle of the degassing pipe 7g and opens and closes the ammonia flow path of the degassing pipe 7g. Such a degassing pipe 7g and a third on-off valve 7h supply gaseous ammonia (residual ammonia) remaining in the ammonia supply pipe 7b (more accurately, a leak check pipe) to the recovery tank 7k.

The ammonia control pipe 7i is a gas pipe provided between the ammonia supply pipe 7b (more accurately, a leak check pipe) and the control tank 7m, and one end thereof is the rear stage of the second on-off valve 7e in the ammonia supply pipe 7b (more accurately, the leak check pipe). It is connected to the downstream side), and the other end is connected to the gas inlet of the adjusting tank 7 m. The second control valve 7j is provided in the middle of the ammonia control pipe 7i and is automatically controlled by the plant control device described above to automatically adjust the flow rate of gaseous ammonia in the ammonia control pipe 7i.

The recovery tank 7k is a water tank provided with a water supply port for receiving water supplied from the water supply pump 7t in addition to the gas inlet described above, and temporarily stores the residual ammonia as ammonia water. That is, the recovery tank 7k stores the residual ammonia recovered from the leak check pipe via the degassing pipe 7g and the third on-off valve 7h as ammonia water by dissolving it in the water supplied from the water supply pump 7t. When such a recovery tank 7k receives a predetermined amount of residual ammonia from the ammonia supply pipe 7b, the ammonia water is supplied to the first inflow port of the adjusting tank 7m.

The adjusting tank 7m is provided with a second inflow port for receiving gaseous ammonia from the ammonia adjusting tube 7i in addition to the above first inflow port, and the gaseous ammonia received from the ammonia adjusting tube 7i is added to the ammonia water received from the first inflow port. By doing so, ammonia water whose ammonia concentration is adjusted to a predetermined target concentration R is generated.

The target concentration R is realized by the second control valve 7j that regulates the amount of gaseous ammonia supplied to the regulating tank 7m. That is, the plant control device controls the supply amount of the second control valve 7j, that is, gaseous ammonia so that the concentration of ammonia water obtained from the concentration sensor such as the conductivity meter provided in the adjusting tank 7 m becomes the target concentration R.

Such a regulating tank 7m supplies ammonia water having a target concentration R to the denitration device 9b of the exhaust unit 9 via the first gas supply pipe 7n and the third control valve 7p, and also supplies the second gas supply pipes 7q and the fourth. It is supplied to the combustor 6 via the control valve 7r. The target concentration R is, for example, the same as the concentration of commercially available ammonia water (for example, 25%). The ammonia water corresponds to the ammonia in the present invention.

The first gas supply pipe 7n is a pipe provided between the adjusting tank 7m and the exhaust section 9, one end of which is connected to the output port of the adjusting tank 7m, and the other end of which is the reduction of the denitration device 9b of the exhaust section 9. It is connected to the agent inlet. The third control valve 7p is provided in the middle of the first gas supply pipe 7n, and constitutes a recovery gas supply unit together with the first gas supply pipe 7n.

The third control valve 7p supplies ammonia water having a target concentration R to the denitration device 9b in cooperation with the first gas supply pipe 7n, and is supplied from the adjusting tank 7m via the first gas supply pipe 7n. The amount of ammonia water having a target concentration R supplied to the denitration device 9b is adjusted. Such a first gas supply pipe 7n and a third control valve 7p constitute a second recovered gas supply unit in the present invention.

The second gas supply pipe 7q is a pipe provided between the adjusting tank 7m and the combustor 6, one end of which is connected to the output port of the adjusting tank 7m, and the other end of which is connected to the fuel inlet of the combustor 6. Has been done. The fourth control valve 7r is provided in the middle of the second gas supply pipe 7q, and constitutes a recovery gas supply unit together with the second gas supply pipe 7q.

That is, the fourth control valve 7r supplies ammonia water having a target concentration R to the combustor 6 as fuel in cooperation with the second gas supply pipe 7q, and is adjusted via the second gas supply pipe 7q. The amount of ammonia water having a target concentration R supplied from the tank 7 m to the fuel inlet of the combustor 6 is adjusted. Such a second gas supply pipe 7q and a fourth control valve 7r constitute a recovery gas supply unit in the present invention.

The water supply pipe 7s is a pipe provided between a water supply system such as a public water supply and a recovery tank 7k, and one end thereof is connected to the public water supply and the other end is connected to the water supply port of the recovery tank 7k. There is. The water supply pump 7t is provided in the middle of the water supply pipe 7s, and supplies a predetermined flow rate of water to the water supply port of the recovery tank 7k. The water supply pump 7t is a process device controlled by the above-mentioned plant control device. For example, the water supply pump 7t is started at the timing when the third on-off valve 7h is opened and the residual ammonia is recovered in the recovery tank 7k, and has a predetermined capacity. Water is supplied to the recovery tank 7k.

The city gas supply unit 8 includes a city gas supply pipe 8a, a fourth on-off valve 8b, a fifth on-off valve 8c, and a fifth control valve 8d, and supplies a predetermined flow rate of city gas to the combustor 6. The city gas supply pipe 8a is a gas pipe provided between the high-pressure city gas line and the fuel inlet of the combustor 6, one end of which is connected to the city gas facility and the other end of which is the fuel flow of the combustor 6. It is connected to the entrance.

The fourth on-off valve 8b is provided in the middle of the city gas supply pipe 8a, and automatically opens and closes the city gas flow path which is the internal space of the city gas supply pipe 8a. The fifth on-off valve 8c is provided in the rear stage (downstream side) of the fourth on-off valve 8b in the city gas supply pipe 8a, and opens and closes the city gas of the city gas supply pipe 8a by automatic operation. The fifth control valve 8d is provided in the rear stage (downstream side) of the fifth on-off valve 8c in the city gas supply pipe 8a. The fifth control valve 8d is automatically controlled by a plant control device (not shown) to automatically adjust the flow rate of city gas in the city gas supply pipe 8a.

In the city gas supply pipe 8a, the portion between the fourth on-off valve 8b and the fifth on-off valve 8d is a leak check pipe for checking the gas leak (leak check) of the city gas supply pipe 8a.

The exhaust unit 9 includes an exhaust pipe 9a, a denitration device 9b, a diluted air pipe 9c, and a fan 9d, and exhausts the combustion gas of the combustor 6 to the outside. The exhaust pipe 9a is a gas pipe having one end connected to the outlet port of the turbine 4 and the other end open to the atmosphere. The denitration device 9b is provided in the middle of the exhaust pipe 9a, and denitrates the combustion gas flowing through the exhaust pipe 9a. That is, the denitration device 9b acts on the combustion gas using the ammonia water supplied from the adjusting tank 7m via the first gas supply pipe 7n and the third control valve 7p as a reducing agent, so that the nitrogen contained in the combustion gas is contained. Reduces the concentration of oxides (NOx).

The diluted air pipe 9c is a gas pipe branched from the exhaust pipe 9a, one end of which is connected to the front stage (upstream side) of the denitration device 9b in the exhaust pipe 9a, and the other end is open to the atmosphere. The fan 9d is provided in the middle of the diluted air pipe 9c, and supplies the air taken in from the atmosphere to the denitration device 9b as diluted air for diluting the combustion gas.

Next, the operation of the power generation device P configured in this way will be described in detail.
In this power generation device P, a predetermined flow rate of gaseous ammonia is supplied to the combustor 6 as one fuel from the ammonia supply unit 7 by the first control valve 7f.

Further, apart from such fuels (gas ammonia and city gas), compressed air is supplied to the combustor 6 from the compressor 3 as an oxidant. Then, in the combustor 6, fuels (gas ammonia and city gas) are mixed and combusted using compressed air, and high-temperature and high-pressure combustion gas is generated. Then, this combustion gas is supplied from the combustor 6 to the turbine 4 to generate electric power, and the generator 2 is driven by the power to generate electric power. That is, in this power generation device P, the combustion gas after the energy of the combustion gas is recovered by the turbine 4 is supplied to the exhaust unit 9.

Here, for such a steady operation of the power generation device P, a leak check in the ammonia supply unit 7 is performed as necessary. In this leak check, for example, the inside of the leak check pipe is sealed with a gaseous ammonia atmosphere by closing the first on-off valve 7d after supplying gaseous ammonia from the vaporizer 7c to the ammonia supply pipe 7b with the second on-off valve 7e closed. Make it a space. Then, in this state, by monitoring the internal pressure of the leak check pipe in chronological order, it is inspected whether or not a leak due to a crack or the like has occurred in the ammonia supply pipe 7b (more correctly, the leak check pipe).

When such a leak check is completed, gaseous ammonia will remain in the leak check pipe. Such residual ammonia can be removed by changing the setting of the third on-off valve 7h from the closed state to the open state. It is collected in the collection tank 7k via the degassing pipe 7g and the third on-off valve 7h that function as the collection unit. Then, such residual ammonia is converted into ammonia water in the recovery tank 7k, further adjusted to a target concentration R in the adjusting tank 7m, and supplied to the combustor 6 and the denitration device 9b for consumption. In addition to the leak check, degassing in the piping after the plant is stopped and the gas blown out from the safety valve are also subject to disposal, and are similarly recovered in the recovery tank.

According to the power generation device P according to the present embodiment, the residual ammonia previously discarded is effectively used as a fuel in the combustor 6 and effectively used as a reducing agent in the denitration device 9b, so that the liquid is a fuel. It is possible to improve the utilization rate of ammonia more than before.

The present invention is not limited to the above embodiment, and for example, the following modifications can be considered.
(1) In the above embodiment, the case where the residual ammonia (gas ammonia) residing in the leak check tube as the gaseous ammonia discharged to the outside of the system is recovered in the recovery tank 7k or the recovery adjustment tank 7u has been described. Not limited to. The gaseous ammonia discharged to the outside of the system from the combustion devices 5, 5A to 5E includes, in addition to the gaseous ammonia residing in the leak check pipe, for example, the gas in the pipe after the power generation device P (power generation plant) has stopped operation. It is possible to remove the gas or blow out gas from the safety valve.

(2) In the above embodiment, the residual ammonia is effectively utilized as a fuel in the combustor 6 and effectively as a reducing agent in the denitration device 9b, but the present invention is not limited thereto. For example, as shown in FIG. 2, residual ammonia may be supplied only to the denitration device 9b. That is, as shown in FIG. 2 as the combustion device 5A and the ammonia supply unit 7A, the first gas supply pipe 7n and the first gas supply pipe 7n and the first gas supply pipe 7n are replaced with the recovery gas supply unit composed of the second gas supply pipe 7q and the fourth control valve 7r. 3 Only the second recovered gas supply unit composed of the control valve 7p may be provided.

Further, as shown in FIG. 3 as the combustor 5B and the ammonia supply unit 7B, the ammonia water in the adjusting tank 7 m may be supplied only to the combustor 6. In this case, if the combustion temperature of the combustor 6 can be lowered by utilizing the latent heat of vaporization of the ammonia water, it is possible to suppress the generation of nitrogen oxides (NOx).

(3) In the above embodiment, the recovery tank 7k and the adjustment tank 7m are provided as separate tanks, but the present invention is not limited to this. For example, as shown in FIG. 4 as the combustion device 5C and the ammonia supply unit 7C, the recovery tank 7k and the adjustment tank 7m may be integrated into a single recovery adjustment tank 7u.

(4) In the above embodiment, all of the residual ammonia is recovered in the recovery tank 7k, but the present invention is not limited to this. For example, as shown in FIG. 5 as the combustion device 5D and the ammonia supply unit 7D, a part of the residual ammonia is recovered in the recovery tank 7v, and the residual ammonia recovered in the recovery tank 7v is boosted by the booster pump 7w to vaporize the vaporizer 7c. May be supplied to. Such a recovery tank 7v and a booster pump 7w constitute a fourth recovery gas supply unit that supplies a part of residual ammonia to the vaporizer 7c.

(5) In the above embodiment, the residual ammonia is converted into ammonia water in the recovery tank 7k, but the present invention is not limited to this. For example, by operating only the city gas supply unit 8, only the city gas is burned to activate the power generation device P, and as shown in FIG. 6 as the combustion device 5E and the ammonia supply unit 7E, the power generation device P is separately recovered from the ammonia supply pipe 7b. A part of the residual ammonia may be directly supplied to the denitration device 9b via the supply pipe 7x for consumption.

That is, "ammonia" in the present invention is not limited to ammonia water, but is a term that also includes gaseous ammonia. Further, the supply pipe 7x corresponds to a third recovered gas supply unit that directly supplies a part of the residual ammonia to the denitration device 9b. Further, although a part of the residual ammonia (gaseous ammonia) is supplied to the denitration device 9b in FIG. 6, a part of the residual ammonia (gaseous ammonia) may be supplied to the combustor 6 as a fuel or a reducing agent. .. In either case where a part of the residual ammonia is supplied to the denitration device 9b or the combustor 6, the supply pipe may be provided with an on-off valve and a control valve.

(6) In the above embodiment, the target concentration R of ammonia water in the adjusting tank 7 m is set to be equivalent to the concentration of commercially available ammonia water, but the present invention is not limited to this. Other concentrations may be adjusted as needed.

(7) In the above embodiment, city gas and gaseous ammonia are co-combusted in the combustor 6, but the present invention is not limited to this. Gaseous ammonia may be burned as a single fuel.

(8) In the above embodiment, the case where the present invention is applied to the power generation device P of the type in which the generator 2 is driven by the gas turbine 1 has been described, but the application destination of the present invention is not limited to the power generation device P. The present invention is applicable to various combustion devices using gaseous ammonia or liquid ammonia as fuel.

(9) In the above embodiment, one end of the ammonia control pipe 7i is connected to the rear stage (downstream side) of the second on-off valve 7e in the ammonia supply pipe 7b, but the present invention is not limited to this. For example, one end of the ammonia control pipe 7i may be connected to the ammonia supply pipe 7b between the tank 7a and the vaporizer 7c, that is, in the vicinity of the output port of the tank 7a. By connecting one end of the ammonia control tube 7i in this way, the recovery tank 7k is in a state where the gaseous ammonia supplied to the recovery tank 7k or the recovery control tank 7u is separated from the supply of the gaseous ammonia (fuel) to the combustor 6. Alternatively, it can be supplied to the recovery adjustment tank 7u.

P Power generator 1 Gas turbine 2 Generator 3 Compressor 4 Turbine 5, 5A-5E Combustor 6 Combustor 7, 7A-7E Ammonia supply 7a Tank 7b Ammonia supply pipe 7c Vaporizer 7d 1st on-off valve 7e 2nd on-off valve 7f 1st control valve 7g Gas vent pipe (gas recovery unit)
7h 3rd on-off valve (gas recovery unit)
7i Ammonia control pipe 7j 2nd control valve 7k Recovery tank (gas recovery section)
7m adjustment tank 7n 1st gas supply pipe (recovery gas supply section)
7p 3rd control valve (recovered gas supply unit)
7q 2nd gas supply pipe (recovery gas supply section)
7r 4th control valve (recovered gas supply unit)
7s Water supply pipe 7t Water supply pump 7u Recovery adjustment tank 7v Recovery tank 7w Booster pump 7x Supply pipe 8 City gas supply section 8a City gas supply pipe 8b 4th on-off valve 8c 5th control valve 8d 5th on-off valve 9, 9A Exhaust section 9a Exhaust pipe 9b Denitration device 9c Diluted air pipe 9d Fan

Claims (11)

With a combustor,
An ammonia supply unit that supplies gaseous ammonia as fuel to the combustor,
It is provided with an exhaust unit that exhausts the combustion gas of the combustor.
The combustion apparatus is characterized by comprising a gas recovery unit for recovering the gaseous ammonia discharged to the outside of the system and a recovery gas supply unit for supplying the ammonia of the gas recovery unit to the combustor. The exhaust unit includes a denitration device for denitration of the combustion gas.
The combustion device according to claim 1, further comprising a second recovered gas supply unit that supplies the ammonia to the denitration device. With a combustor,
An ammonia supply unit that supplies gaseous ammonia as fuel to the combustor,
It is provided with an exhaust unit that exhausts the combustion gas of the combustor.
The exhaust unit includes a denitration device for denitration of the combustion gas.
The ammonia supply unit is characterized by including a gas recovery unit that recovers the gaseous ammonia discharged to the outside of the system and a second recovery gas supply unit that supplies the ammonia of the gas recovery unit to the denitration device. Combustion device. The gas recovery unit recovers the gaseous ammonia to generate ammonia water.
The combustion device according to claim 1 or 2 , wherein the recovered gas supply unit supplies the ammonia water as the ammonia to the combustor. The gas recovery unit recovers the gaseous ammonia to generate ammonia water.
The combustion device according to claim 2 or 3, wherein the second recovered gas supply unit supplies the ammonia water as the ammonia to the denitration device. The combustion apparatus according to claim 4 or 5 , wherein the gas recovery unit takes in a part of the gaseous ammonia from the ammonia supply unit to generate ammonia water having a predetermined concentration. The gas recovery unit includes a recovery tank that recovers the gaseous ammonia to generate ammonia water, and a adjusting tank that adjusts the ammonia water to a predetermined concentration by adding the gaseous ammonia to the ammonia water received from the recovery tank. The combustion apparatus according to claim 6 , further comprising: The combustion device according to claim 2 or 3, further comprising a third recovered gas supply unit that supplies a part of the gaseous ammonia remaining in the ammonia supply unit to the denitration device. A vaporizer that vaporizes liquid ammonia to generate the gaseous ammonia,
The combustion according to any one of claims 1 to 8 , further comprising a fourth recovered gas supply unit that supplies a part of the gaseous ammonia remaining in the ammonia supply unit to the vaporizer. Device. A gas turbine comprising the combustion apparatus according to any one of claims 1 to 9 . A power generation device using the gas turbine according to claim 10 as a power source.

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