JP2021095323A - Reformer and reforming system - Google Patents

Abstract

To provide a reformer and a reforming system that can shorten the startup time.SOLUTION: A reformer 4 comprises: a reforming unit 5 that utilizes the heat generated by burning an ammonia gas with air to reform the ammonia gas; a supply pipe 6 that is connected to the reformer 5 and through which a mixed gas containing an ammonia gas and air to be supplied to the reformer 5 flows; a gas introduction section 10 that is provided in the supply pipe 6 and introduces an ammonia gas and air in such a manner a tubular flow is generated in the supply pipe 6; an ignition unit 11 that is attached to the supply pipe 6 and ignites the ammonia gas introduced into the supply pipe 6 from the gas introduction section 10; and an ammonia gas introduction section 12 that is provided on the reformer 5 side of the gas introduction section 10 of the supply pipe 6 and introduces the ammonia gas into the inside of the supply pipe 6.SELECTED DRAWING: Figure 2

Description

The present invention relates to a reformer and a reformer system.

For example, Patent Document 1 describes a reformer. The reformer described in Patent Document 1 contains an ammonia combustion catalyst that burns ammonia to generate heat, and hydrogen and nitrogen by decomposing ammonia using the heat generated by the ammonia combustion catalyst. It has an ammonia decomposition catalyst that produces gas.

JP-A-2010-240646

In the above-mentioned prior art, when the reformer is started, ammonia and oxygen react with each other by the ammonia combustion catalyst, so that ammonia is ignited and burned. However, if it takes a long time to ignite the ammonia, the start-up time of the reformer becomes long.

An object of the present invention is to provide a reformer and a reforming system capable of shortening the start-up time.

The reformer according to one aspect of the present invention is connected to a reformer that reforms the fuel gas by utilizing the heat generated by burning the fuel gas with an oxidizing gas, and reforms. A supply pipe through which a gas containing fuel gas and an oxidizing gas to be supplied to the vessel flows, and a first gas provided in the supply pipe and introducing the fuel gas and the oxidizing gas so as to generate a tubular flow inside the supply pipe. An introduction part, an ignition part attached to the supply pipe and igniting the fuel gas introduced into the inside of the supply pipe from the first gas introduction part, and an ignition part provided on the reformer side of the first gas introduction part in the supply pipe. , A second gas introduction unit for introducing fuel gas into the supply pipe is provided.

At the time of starting such a reformer, the fuel gas and the oxidizing gas are introduced into the inside of the supply pipe from the first gas introduction part, and the ignition part ignites, so that the fuel gas is ignited and burned. At this time, the fuel gas and the oxidizing gas are introduced so as to generate a tubular flow inside the supply pipe. Therefore, the fuel gas is ignited to form a tubular flame in a state where the fuel gas and the oxidizing gas are in a tubular flow, so that the high-temperature combustion gas swirls inside the supply pipe toward the reformer. It flows. Further, the fuel gas is introduced into the inside of the supply pipe from the second gas introduction section. The fuel gas is supplied to the reformer in a heated state by receiving heat (combustion heat) from the high-temperature combustion gas. Then, in the reformer, the fuel gas is burned and reformed to generate a reformed gas containing hydrogen. Since the high-temperature combustion heat generated by igniting and burning the fuel gas by the ignition unit is used in this way, the time until the reformed fuel gas ignites is shortened. This shortens the start-up time of the reformer.

The reformer may be further provided with a third gas introduction section provided in the supply pipe to introduce the oxidizing gas into the inside of the supply pipe.

In such a configuration, since the oxidizing gas is introduced into the inside of the supply pipe from the third gas introduction section, the flow rate of the oxidizing gas supplied to the reformer can be easily adjusted.

The third gas introduction section may be provided on the reformer side of the second gas introduction section in the supply pipe.

In such a configuration, the fuel gas introduced into the supply pipe from the second gas introduction section receives heat from the combustion gas to lower the temperature of the combustion gas. Then, the oxidizing gas introduced into the supply pipe from the third gas introduction section receives heat from the combustion gas containing the fuel gas, thereby lowering the temperature of the combustion gas containing the fuel gas. Therefore, the temperature of the high-temperature combustion gas generated by igniting and burning the fuel gas by the ignition unit can be effectively lowered.

The first gas introduction unit may introduce the fuel gas and the oxidizing gas into the inside of the supply pipe in the tangential direction of the inner peripheral surface of the supply pipe.

In such a configuration, the fuel gas and the oxidizing gas are introduced into the inside of the supply pipe in the tangential direction of the inner peripheral surface of the supply pipe, so that the fuel gas and the oxidizing gas flow in a tubular flow inside the supply pipe in a short time. It becomes.

The second gas introduction part introduces the fuel gas into the inside of the supply pipe in the tangential direction of the inner peripheral surface of the supply pipe, and the third gas introduction part introduces the oxidizing gas into the inside of the supply pipe. It may be introduced in the tangential direction of.

In such a configuration, the fuel gas and the oxidizing gas introduced into the supply pipe from the second gas introduction section and the third gas introduction section respectively form a tubular flow, so that they swirl toward the reformer. It flows. Therefore, the fuel gas and the oxidizing gas are mixed with the combustion gas flowing in the tubular flow in the same flow. Therefore, the mixing path of the fuel gas, the oxidizing gas, and the combustion gas becomes long. As a result, in the reformer, the mixing ratio of the fuel gas and the oxidizing gas is equalized, so that the fuel gas is easily ignited and burned.

The reforming system according to another aspect of the present invention includes a reforming apparatus, a fuel gas supply unit that supplies fuel gas to the reforming apparatus, and an oxidizing gas supply unit that supplies oxidizing gas to the reforming apparatus. The reformer is equipped with a reformer that reforms the fuel gas by utilizing the heat generated by burning the fuel gas with the oxidizing gas, and is connected to the reformer and supplied to the reformer. A supply pipe through which a gas containing fuel gas and an oxidizing gas flows, a first gas introduction section provided in the supply pipe and introducing the fuel gas and the oxidizing gas so as to generate a tubular flow inside the supply pipe, and a supply An ignition part that is attached to the pipe and ignites the fuel gas introduced from the first gas introduction part to the inside of the supply pipe, and a reformer side of the first gas introduction part in the supply pipe are provided to supply the fuel gas. It is provided with a second gas introduction unit to be introduced inside the pipe.

In such a reforming system, when the reformer is started, the fuel gas and the oxidizing gas are introduced into the inside of the supply pipe from the first gas introduction section, and the ignition section ignites, so that the fuel gas is ignited. And burn. At this time, the fuel gas and the oxidizing gas are introduced so as to generate a tubular flow inside the supply pipe. Therefore, the fuel gas is ignited to form a tubular flame in a state where the fuel gas and the oxidizing gas are in a tubular flow, so that the high-temperature combustion gas swirls inside the supply pipe toward the reformer. It flows. Further, the fuel gas is introduced into the inside of the supply pipe from the second gas introduction section. The fuel gas is supplied to the reformer in a heated state by receiving heat (combustion heat) from the high-temperature combustion gas. Then, in the reformer, the fuel gas is burned and reformed to generate a reformed gas containing hydrogen. Since the high-temperature combustion heat generated by igniting and burning the fuel gas by the ignition unit is used in this way, the time until the reformed fuel gas ignites is shortened. This shortens the start-up time of the reformer.

The reformer may be further provided with a third gas introduction section provided in the supply pipe to introduce the oxidizing gas into the inside of the supply pipe.

In such a configuration, since the oxidizing gas is introduced into the inside of the supply pipe from the third gas introduction section, the flow rate of the oxidizing gas supplied to the reformer can be easily adjusted.

The reforming system further includes a control unit that controls a fuel gas supply unit, an oxidizing gas supply unit, and an ignition unit, and the fuel gas supply unit controls the flow rate of the fuel gas supplied to the first gas introduction unit. It has one fuel gas valve and a second fuel gas valve that controls the flow rate of the fuel gas supplied to the second gas introduction unit, and the oxidizing gas supply unit is the oxidizing gas supplied to the first gas introduction unit. It has a first oxidizing gas valve that controls the flow rate and a second oxidizing gas valve that controls the flow rate of the oxidizing gas supplied to the third gas introduction unit. 1 Control processing by the first control unit and the first control unit that control the fuel gas valve, the first oxidizing gas valve, the second fuel gas valve, and the second oxidizing gas valve to open and ignite the ignition unit. May have a second control unit that controls the closing of the first fuel gas valve and the first oxidizing gas valve after the execution of.

In such a configuration, when the reformer is started, the first fuel gas valve and the first oxidizing gas valve are controlled to open, and then the first fuel gas valve and the first oxidizing gas valve are controlled to close. Therefore, after the reformer is started, the introduction of the fuel gas as the starting gas and the oxidizing gas into the inside of the supply pipe is stopped, so that the fuel gas as the starting gas is prevented from being burned wastefully. Will be done.

The reforming system further includes a temperature detection unit that detects the temperature of the reformer, and the second control unit is a reformer detected by the temperature detection unit after the control process by the first control unit is executed. When the temperature of the above temperature becomes equal to or higher than a predetermined predetermined temperature, the first fuel gas valve and the first oxidizing gas valve may be controlled to be closed.

In such a configuration, when the temperature of the reformer exceeds the specified temperature, the first fuel gas valve and the first oxidizing gas valve are controlled to close. Therefore, the introduction of the fuel gas and the oxidizing gas as the starting gas into the inside of the supply pipe is stopped at an appropriate time when the combustion and reformation of the fuel gas are performed. Therefore, wasteful combustion of the fuel gas is further prevented.

The reforming system further includes a temperature detection unit that detects the temperature of the reformer, the reformer has a catalyst for burning fuel gas, and the first control unit is a first fuel gas valve and a first oxidizing unit. After controlling to open the gas valve and the second fuel gas valve and controlling to ignite the ignition part, when the temperature of the reformer detected by the temperature detection part becomes equal to or higher than a predetermined predetermined temperature, the second It may be controlled to open the oxidizing gas valve.

In such a configuration, the fuel gas and the oxidizing gas as the starting gas are introduced into the inside of the supply pipe from the first gas introduction part, and the reformed fuel gas is introduced from the second gas introduction part of the supply pipe. After being introduced inside, when the temperature of the reformer exceeds the specified temperature, the second oxidizing gas valve is controlled to open. Therefore, even if the catalyst that burns the fuel gas is easily oxidized, the oxidizing gas will not be introduced into the supply pipe from the third gas introduction section until the temperature of the reformer exceeds the specified temperature. Therefore, the catalyst is prevented from being oxidized and deteriorated. Further, when the temperature of the reformer is equal to or higher than the specified temperature, the first fuel gas valve and the first oxidizing gas valve are controlled to be closed. Therefore, the introduction of the fuel gas and the oxidizing gas as the starting gas into the inside of the supply pipe is stopped at an appropriate time when the combustion and reformation of the fuel gas are performed. Therefore, wasteful combustion of the fuel gas is further prevented.

The reforming system further includes a control unit that controls a fuel gas supply unit, an oxidizing gas supply unit, and an ignition unit, and the fuel gas supply unit controls the flow rate of the fuel gas supplied to the first gas introduction unit. It has one fuel gas valve and a second fuel gas valve that controls the flow rate of the fuel gas supplied to the second gas introduction unit, and the oxidizing gas supply unit is the oxidizing gas supplied to the first gas introduction unit. It has an oxidizing gas valve that controls the flow rate, and the control unit controls to open the first fuel gas valve, the second fuel gas valve, and the oxidizing gas valve when the reformer is started, and ignites the ignition part. It may have a first control unit to be controlled and a second control unit to control so as to close the first fuel gas valve after the control process by the first control unit is executed.

In such a configuration, when the reformer is started, the first fuel gas valve and the oxidizing gas valve are controlled to open, and then the first fuel gas valve is controlled to close. Therefore, after the reformer is started, the introduction of the fuel gas as the starting gas into the inside of the supply pipe is stopped, so that the fuel gas as the starting gas is prevented from being burned wastefully. Further, since the third gas introduction section for introducing the oxidizing gas into the inside of the supply pipe becomes unnecessary, the valve for controlling the flow rate of the oxidizing gas supplied to the third gas introduction section becomes unnecessary. Therefore, the configuration of the oxidizing gas supply unit can be simplified.

According to the present invention, the start-up time of the reformer can be shortened.

It is a schematic block diagram which shows the reforming system provided with the reforming apparatus which concerns on 1st Embodiment of this invention. It is a block diagram which shows the reformer which concerns on 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line III-III of FIG. FIG. 2 is a sectional view taken along line IVa-IVa and a sectional view taken along line IVb-IVb of FIG. It is a flowchart which shows the detail of the procedure of the control processing executed by the control unit shown in FIG. It is a timing diagram which shows the operation of the reforming system shown in FIG. It is a block diagram which shows the reformer which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the detail of the procedure of the control processing executed by the control unit in the reforming system provided with the reforming apparatus which concerns on 3rd Embodiment of this invention. It is a timing diagram which shows the operation of the reforming system provided with the control unit which executes the control process shown in FIG. It is a schematic block diagram which shows the reforming system provided with the reforming apparatus which concerns on 4th Embodiment of this invention. It is a block diagram which shows the reformer which concerns on 4th Embodiment of this invention. It is a flowchart which shows the detail of the procedure of the control processing executed by the control unit shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 1 is a schematic configuration diagram showing a reforming system including the reforming apparatus according to the first embodiment of the present invention. In FIG. 1, the reforming system 1 includes an ammonia gas supply source 2, an air supply source 3, and a reforming device 4 of the present embodiment.

Ammonia gas source 2 generates ammonia gas (NH ₃ gas) as a fuel gas. Although not particularly shown, the ammonia gas supply source 2 includes an ammonia tank that stores ammonia in a liquid state and a vaporizer that vaporizes the liquid ammonia to generate ammonia gas.

The air supply source 3 generates air, which is an oxidizing gas. As the air supply source 3, for example, a blower or the like is used.

FIG. 2 is a configuration diagram showing the reformer 4 of the present embodiment. In FIG. 2, the reformer 4 is a device that reforms ammonia gas. The reformer 4 includes a reformer 5 and a supply pipe 6 connected to the reformer 5.

The reformer 5 generates a reformed gas containing hydrogen by reforming the ammonia gas by utilizing the heat generated by burning the ammonia gas with air. The reformer 5 has a combustion catalyst 7 that burns ammonia gas, and a reforming catalyst 8 that decomposes ammonia gas into hydrogen by the heat generated by the combustion catalyst 7. The reforming catalyst 8 is arranged on the downstream side (opposite side of the supply pipe 6) of the combustion catalyst 7.

The combustion catalyst 7, for example, zeolites supported palladium and copper catalysts or _{CuO / 10Al 2 O 3 · 2B} 2 O 3 or the like is used. The combustion catalyst 7 burns ammonia gas in a temperature range of, for example, 200 ° C. to 400 ° C. As the reforming catalyst 8, for example, Ru / CeO ₂ , Ru / ZrO ₂ , Ru / MgO, Ru / Al ₂ O ₃ or Ru / SiO _{2 and the} like are used. The reforming catalyst 8 decomposes ammonia gas into hydrogen in a temperature range of, for example, 250 ° C. to 500 ° C.

The supply pipe 6 is a cylindrical pipe through which a gas containing ammonia gas and air supplied to the reformer 5 flows. The opening at the tip of the supply pipe 6 is closed with a lid 9. The tip of the supply pipe 6 is the end of the supply pipe 6 opposite to the connecting portion with the reformer 5.

At the tip of the supply pipe 6, as shown in FIG. 3, four gas introduction parts 10 (first gas introduction parts) for introducing ammonia gas and air as starting gas into the inside of the supply pipe 6 are provided. Has been done. Each gas introduction unit 10 introduces ammonia gas and air so as to generate a tubular flow inside the supply pipe 6. Specifically, the gas introduction portions 10 are arranged at equal intervals in the tangential direction of the inner peripheral surface 6a of the supply pipe 6. Therefore, the ammonia gas and air are introduced into the supply pipe 6 in the tangential direction of the inner peripheral surface 6a of the supply pipe 6. At this time, ammonia gas and air are introduced into the supply pipe 6 in a mixed state. Here, the ammonia gas and air introduced into the supply pipe 6 from the gas introduction unit 10 are referred to as start-up ammonia gas and start-up air, respectively.

At the tip of the supply pipe 6, an ignition unit 11 for igniting the starting ammonia gas introduced into the inside of the supply pipe 6 from each gas introduction unit 10 is attached. The ignition unit 11 is fixed to the lid 9. The ignition unit 11 is, for example, a glow plug or a spark plug.

As shown in FIG. 4A, two ammonia gas introductions for introducing ammonia gas into the inside of the supply pipe 6 are carried out on the downstream side (reformer 5 side) of the gas introduction part 10 in the supply pipe 6. A unit 12 (second gas introduction unit) is provided. Each ammonia gas introduction unit 12 introduces ammonia gas so as to generate a tubular flow inside the supply pipe 6. Specifically, each ammonia gas introduction portion 12 is arranged in the tangential direction of the inner peripheral surface 6a of the supply pipe 6. Therefore, the ammonia gas is introduced into the inside of the supply pipe 6 in the tangential direction of the inner peripheral surface 6a of the supply pipe 6. Here, the ammonia gas introduced into the supply pipe 6 from the ammonia gas introduction unit 12 is used as the main ammonia gas for reforming.

As shown in FIG. 4B, two air introduction sections 13 (third gas introduction section) that introduce air into the inside of the supply pipe 6 are located downstream of the ammonia gas introduction section 12 in the supply pipe 6. ) Is provided. Each air introduction unit 13 introduces air so that a tubular flow is generated inside the supply pipe 6. Specifically, each air introduction portion 13 is arranged in the tangential direction of the inner peripheral surface 6a of the supply pipe 6. Therefore, air is introduced into the supply pipe 6 in the tangential direction of the inner peripheral surface 6a of the supply pipe 6. The air introduction unit 13 is arranged at a position corresponding to, for example, the ammonia gas introduction unit 12. Here, the air introduced into the supply pipe 6 from the air introduction unit 13 is used as the main air for reforming.

The gas introduction unit 10, the ammonia gas introduction unit 12, and the air introduction unit 13 may be separate from the supply pipe 6 or may be integrated with the supply pipe 6.

Returning to FIG. 1, the ammonia gas supply source 2 and the reformer 4 are connected to each other via the ammonia gas flow paths 14 and 15. The air supply source 3 and the reformer 4 are connected to each other via the air flow paths 16 and 17.

One end of the ammonia gas flow path 14 is connected to the ammonia gas supply source 2. The other end of the ammonia gas flow path 14 is connected to each gas introduction section 10 of the reformer 4. The ammonia gas flow path 14 is a flow path through which the starting ammonia gas flows from the ammonia gas supply source 2 to the gas introduction unit 10. One end of the air flow path 16 is connected to the air supply source 3. The other end of the air flow path 16 is connected to the ammonia gas flow path 14. The air flow path 16 is a flow path through which starting air flows from the air supply source 3 to the gas introduction unit 10.

One end of the ammonia gas flow path 15 is connected to the ammonia gas flow path 14. The other end of the ammonia gas flow path 15 is connected to each ammonia gas introduction section 12 of the reformer 4. The ammonia gas flow path 15 is a flow path through which the main ammonia gas flows from the ammonia gas supply source 2 to the ammonia gas introduction unit 12.

One end of the air flow path 17 is connected to the air flow path 16. The other end of the air flow path 17 is connected to each air introduction portion 13 of the reformer 4. The air flow path 17 is a flow path through which the main air flows from the air supply source 3 to the air introduction portion 13.

An ammonia gas valve 18 is arranged in the ammonia gas flow path 14. The ammonia gas valve 18 is a first fuel gas valve that controls the flow rate of the starting ammonia gas supplied to the gas introduction unit 10. Here, the ammonia gas valve 18 functions as a starting ammonia gas valve. An air valve 19 is arranged in the air flow path 16. The air valve 19 is a first oxidizing gas valve that controls the flow rate of the starting air supplied to the gas introduction unit 10. The air valve 19 functions as a starting air valve. As the ammonia gas valve 18 and the air valve 19, an electromagnetic flow control valve is used.

An ammonia gas valve 20 is arranged in the ammonia gas flow path 15. The ammonia gas valve 20 is a second fuel gas valve that controls the flow rate of the main ammonia gas supplied to the ammonia gas introduction unit 12. The ammonia gas valve 20 functions as a main ammonia gas valve. An air valve 21 is arranged in the air flow path 17. The air valve 21 is a second oxidizing gas valve that controls the flow rate of the main air supplied to the air introduction unit 13. The air valve 21 functions as a main air valve. As the ammonia gas valve 20 and the air valve 21, an electromagnetic flow control valve is used.

The ammonia gas supply source 2, the ammonia gas flow paths 14 and 15, and the ammonia gas valves 18 and 20 constitute an ammonia gas supply unit 22 (fuel gas supply unit) that supplies ammonia gas to the reformer 4. The air supply source 3, the air flow paths 16 and 17, and the air valves 19 and 21 constitute an air supply unit 23 (oxidizing gas supply unit) that supplies air to the reformer 4.

A hydrogen utilization device 25 is connected to the reformer 5 of the reformer 4 via a reforming gas flow path 24. The reformed gas flow path 24 is a flow path through which the reformed gas generated by the reformer 5 flows toward the hydrogen utilization device 25.

The hydrogen utilization device 25 is an apparatus that utilizes hydrogen contained in the reforming gas. Examples of the hydrogen utilization device 25 include a combustion device such as an ammonia engine or an ammonia gas turbine using ammonia as fuel, and a fuel cell that generates power by chemically reacting hydrogen with oxygen in the air.

Further, the reforming system 1 includes a temperature sensor 26 and a control unit 27. The temperature sensor 26 is a temperature detection unit that detects the temperature of the reformer 5. The temperature sensor 26 may detect, for example, the temperature of the gas flowing into the combustion catalyst 7, or may detect the temperature of the reforming catalyst 8 or the combustion catalyst 7.

The control unit 27 is composed of a CPU, RAM, ROM, an input / output interface, and the like. The control unit 27 controls the ammonia gas valves 18 and 20 of the ammonia gas supply unit 22, the air valves 19 and 21 of the air supply unit 23, and the ignition unit 11 based on the detected value of the temperature sensor 26. The control unit 27 has a first control unit 28 and a second control unit 29.

The first control unit 28 controls the ammonia gas valves 18 and 20 and the air valves 19 and 21 to be opened and controls the ignition unit 11 to be ignited when the reformer 4 is started.

The second control unit 29 controls to close the ammonia gas valve 18 and the air valve 19 after the control process by the first control unit 28 is executed. Specifically, the second control unit 29 determines that the temperature of the reformer 5 detected by the temperature sensor 26 becomes equal to or higher than a predetermined predetermined temperature after the control process by the first control unit 28 is executed. The ammonia gas valve 18 and the air valve 19 are controlled to be closed.

FIG. 5 is a flowchart showing the details of the procedure of the control process executed by the control unit 27 shown in FIG. Before the execution of this treatment, the ammonia gas valves 18 and 20 and the air valves 19 and 21 are all fully closed.

In FIG. 5, the control unit 27 first controls the ammonia gas valve 18 and the air valve 19 to open when the reformer 4 is instructed to start by a manual switch or the like (procedure S101). As a result, starting ammonia gas is supplied to the gas introduction section 10 of the reformer 4 (see FIG. 6A), and starting air is supplied to the gas introduction section 10 (see FIG. 6B). ). At this time, the ammonia gas valve 18 and the air valve 19 are controlled so that the supply flow rates of the starting ammonia gas and the starting air become specified values (for example, equivalent ratio).

Subsequently, the control unit 27 controls to ignite the ignition unit 11 (procedure S102). As a result, the ignition unit 11 is ignited, so that the starting ammonia gas is ignited.

Subsequently, the control unit 27 controls to open the ammonia gas valve 20 (procedure S103). As a result, the main ammonia gas is supplied to the ammonia gas introduction unit 12 of the reformer 4 (see FIG. 6C).

Subsequently, the control unit 27 controls to open the air valve 21 (procedure S104). As a result, the main air is supplied to the air introduction unit 13 of the reformer 4 (see FIG. 6D). At this time, the air valve 21 is controlled together with the ammonia gas valve 20 so that the supply flow rates of the main ammonia gas and the main air become specified values (for example, equivalent ratio).

Subsequently, the control unit 27 acquires the detected value of the temperature sensor 26 (procedure S105). Then, the control unit 27 determines whether or not the temperature of the reformer 5 is equal to or higher than the specified temperature T1 (see FIG. 6E) (procedure S106). The specified temperature T1 is a temperature at which the main ammonia gas can be burned (combustible temperature). When the control unit 27 determines that the temperature of the reformer 5 is not equal to or higher than the specified temperature T1, the control unit 27 executes the procedure S105 again.

When the control unit 27 determines that the temperature of the reformer 5 is equal to or higher than the specified temperature T1, the control unit 27 controls to close the ammonia gas valve 18 and the air valve 19 (procedure S107). At this time, it is desirable that the ammonia gas valve 18 and the air valve 19 are fully closed. As a result, the supply of the starting ammonia gas to the gas introduction section 10 of the reformer 4 is stopped (see FIG. 6A), and the supply of the starting air to the gas introduction section 10 is stopped (FIG. 6). See (b)).

Subsequently, the control unit 27 acquires the detected value of the temperature sensor 26 (procedure S108). Then, the control unit 27 determines whether or not the temperature of the reformer 5 is equal to or higher than the specified temperature T2 (see FIG. 6E) (procedure S109). The specified temperature T2 is a temperature at which the main ammonia gas can be reformed (reformable temperature), and is higher than the specified temperature T1. When the control unit 27 determines that the temperature of the reformer 5 is not equal to or higher than the specified temperature T2, the control unit 27 executes the procedure S108 again.

When the control unit 27 determines that the temperature of the reformer 5 is equal to or higher than the specified temperature T2, the control unit 27 controls the opening degrees of the ammonia gas valve 20 and the air valve 21 (procedure S110). At this time, the opening degrees of the ammonia gas valve 20 and the air valve 21 are controlled so that the supply flow rates of the main ammonia gas and the main air for performing an appropriate reforming operation are set by the reformer 5. (C), (d)).

Here, the first control unit 28 executes the above procedures S101 to S104. The second control unit 29 executes the above steps S105 to S110.

In the reforming system 1 as described above, when the start-up of the reformer 4 is instructed, the ammonia gas valve 18 and the air valve 19 are opened, as shown in FIGS. 6A and 6B. , Ammonia gas for starting and air for starting are supplied to the gas introduction unit 10 of the reformer 4. Then, the starting ammonia gas and the starting air are introduced into the inside of the supply pipe 6 from the gas introduction unit 10. At this time, since the starting ammonia gas and the starting air are introduced in the tangential direction of the inner peripheral surface 6a of the supply pipe 6, a tubular flow is formed inside the supply pipe 6.

When the ignition unit 11 ignites in that state, the starting ammonia gas ignites to form a tubular flame, and the starting ammonia gas burns. Specifically, as shown in the following formula, ammonia and oxygen in the air chemically react to generate combustion gas (exothermic reaction).
NH ₃ + 3/4O ₂ → 1 / 2N ₂ + 3 / 2H ₂ O… (A)

At this time, the temperature of the tubular flame rises to, for example, about 1000 ° C to 1700 ° C. Therefore, a high-temperature combustion gas is generated by the above-mentioned oxidation reaction of ammonia. The high-temperature combustion gas swirls inside the supply pipe 6 toward the reformer 5 and flows.

After that, when the ammonia gas valve 20 is opened, the main ammonia gas is supplied to the ammonia gas introduction section 12 of the reformer 4 as shown in FIG. 6 (c). Then, the main ammonia gas is introduced into the inside of the supply pipe 6 from the ammonia gas introduction unit 12. The temperature of the main ammonia gas is about room temperature, which is sufficiently lower than the temperature of the combustion gas. Therefore, the main ammonia gas and the combustion gas exchange heat. Specifically, the main ammonia gas is heated by receiving heat from the combustion gas and cools the combustion gas. At this time, the temperature of the combustion gas containing the main ammonia gas is lower than the ignition temperature of ammonia (for example, about 650 ° C. in the atmosphere). Therefore, the main ammonia gas does not shift to the combustion state inside the supply pipe 6.

After that, when the air valve 21 is opened, the main air is supplied to the air introduction unit 13 of the reformer 4 as shown in FIG. 6D. Then, the main air is introduced into the inside of the supply pipe 6 from the air introduction unit 13. The temperature of the main air is also about room temperature. Therefore, heat is exchanged between the main air and the combustion gas containing the main ammonia gas. Specifically, the main air is heated by receiving heat from the combustion gas containing the main ammonia gas, and at the same time, the combustion gas containing the main ammonia gas is cooled. At this time, the temperature of the mixed gas in which the main ammonia gas, the main air, and the combustion gas are mixed drops to, for example, about 200 ° C. to 400 ° C.

When such a mixed gas is introduced into the reformer 5, the temperature of the reformer 5 rises. Then, as shown in FIG. 6 (e), when the temperature of the reformer 5 reaches the specified temperature T1 (combustible temperature), the ammonia gas valve 18 and the air valve 19 are closed, so that FIG. 6 (a) ), (B), the supply of the starting ammonia gas and the starting air to the gas introduction unit 10 is stopped. Therefore, since the introduction of the starting ammonia gas and the starting air into the inside of the supply pipe 6 is stopped, the combustion of the starting ammonia gas is stopped.

Further, when the temperature of the reformer 5 reaches the specified temperature T1 (combustible temperature), the main ammonia gas is burned by the combustion catalyst 7. Then, the exothermic reaction of the above formula (A) occurs, and combustion gas is generated. Then, the temperature of the reformer 5 further rises due to the heat of the combustion gas (heat of combustion).

Then, when the temperature of the reformer 5 reaches the specified temperature T2 (reformable temperature), it is supplied to the ammonia gas introduction section 12 and the air introduction section 13, respectively, as shown in FIGS. 6 (c) and 6 (d). Since the flow rates of the main ammonia gas and the main air are adjusted, the flow rates of the main ammonia gas and the main air introduced into the supply pipe 6 are adjusted. Here, the flow rate of the main air is reduced and the flow rate of the main ammonia gas is not changed, but the flow rates of the main ammonia gas and the main air may be changed.

When the temperature of the reformer 5 reaches the specified temperature T2 (reformable temperature), the reforming catalyst 8 reforms the main ammonia gas. Specifically, as shown in the following formula, a decomposition reaction of ammonia occurs (endothermic reaction), and a reformed gas containing hydrogen is generated. The reformed gas is supplied to the hydrogen utilization device 25.
NH ₃ → 3 / 2H ₂ + 1 / 2N ₂ … (B)

As described above, in the present embodiment, when the reformer 4 is started, ammonia gas and air are introduced into the supply pipe 6 from the gas introduction unit 10 as starting gas, and the ignition unit 11 is ignited. By doing so, the ammonia gas ignites and burns. At this time, the starting gas is introduced so as to generate a tubular flow inside the supply pipe 6. Therefore, since the ammonia gas is ignited to form a tubular flame while the starting gas is in a tubular flow, the high-temperature combustion gas swirls and flows inside the supply pipe 6 toward the reformer 5. .. Further, the reformed ammonia gas is introduced into the supply pipe 6 from the ammonia gas introduction unit 12. The ammonia gas is supplied to the reformer 5 in a heated state by receiving heat (combustion heat) from the high-temperature combustion gas. Then, in the reformer 5, the ammoni gas is burned and reformed to generate a reformed gas containing hydrogen. Since the high-temperature combustion heat generated by igniting and burning ammonia gas as a starting gas by the ignition unit 11 is used in this way, the time until the reformed ammonia gas ignites is shortened. As a result, the start-up time of the reformer 4 is shortened. In addition, a heater for heating ammonia gas, air, or a catalyst is not required.

Further, in the present embodiment, since air is introduced into the supply pipe 6 from the air introduction unit 13, the flow rate of the air supplied to the reformer 5 can be easily adjusted.

Further, in the present embodiment, the air introduction unit 13 is provided on the reformer 5 side of the ammonia gas introduction unit 12 in the supply pipe 6. Therefore, the ammonia gas introduced into the supply pipe 6 from the ammonia gas introduction unit 12 receives the heat from the combustion gas and lowers the temperature of the combustion gas. Then, the air introduced into the supply pipe 6 from the air introduction unit 13 receives heat from the combustion gas containing ammonia gas, thereby lowering the temperature of the combustion gas containing ammonia gas. Here, since the specific heat of ammonia gas is higher than the specific heat of air, ammonia gas can absorb heat at a flow rate smaller than that of air. Therefore, the temperature drop of the combustion gas due to the endothermic heat of the ammonia gas becomes large. Therefore, the high-temperature combustion gas generated by igniting and burning the ammonia gas by the ignition unit 11 can be effectively lowered in temperature.

Further, in the present embodiment, since ammonia gas and air are introduced into the supply pipe 6 in the tangential direction of the inner peripheral surface 6a of the supply pipe 6, the ammonia gas and air are tubular inside the supply pipe 6 in a short time. It becomes a flow.

Further, in the present embodiment, the ammonia gas introduction unit 12 introduces ammonia gas into the supply pipe 6 in the tangential direction of the inner peripheral surface 6a of the supply pipe 6, and the air introduction unit 13 introduces air into the supply pipe 6. It is introduced inside in the tangential direction of the inner peripheral surface 6a of the supply pipe 6. Therefore, the ammonia gas and air introduced into the supply pipe 6 from the ammonia gas introduction unit 12 and the air introduction unit 13 respectively form a tubular flow, so that they swirl and flow toward the reformer 5. Therefore, the ammonia gas and the air are mixed with the combustion gas flowing in the tubular flow in the same flow. Therefore, the mixing path of ammonia gas and air and combustion gas becomes long. As a result, in the reformer 5, the mixing ratio of ammonia gas and air is equalized, so that the ammonia gas is easily ignited and burned.

Further, in the present embodiment, when the reformer 4 is started, the ammonia gas valve 18 and the air valve 19 are controlled to open, and then the ammonia gas valve 18 and the air valve 19 are controlled to close. Therefore, after the reformer 4 is started, the introduction of the ammonia gas as the starting gas and the air into the inside of the supply pipe 6 is stopped, so that it is possible to prevent the ammonia gas as the starting gas from being burned wastefully. Will be done.

Further, in the present embodiment, when the temperature of the reformer 5 detected by the temperature sensor 26 becomes equal to or higher than the specified temperature T1, the ammonia gas valve 18 and the air valve 19 are controlled to be closed. Therefore, the introduction of ammonia gas and air as starting gas into the inside of the supply pipe 6 is stopped at an appropriate time when the ammonia gas is burned and reformed. Therefore, wasteful combustion of ammonia gas as a starting gas is further prevented.

In the present embodiment, the air introduction unit 13 is provided on the reformer 5 side of the ammonia gas introduction unit 12 in the supply pipe 6, but the embodiment is not particularly limited. Ammonia gas introduction section 12 may be provided on the reformer 5 side of the supply pipe 6 on the reformer 5 side, or the ammonia gas introduction section 12 and the air introduction section 13 may be located at the same position in the axial direction of the supply pipe 6. It may be provided. Further, the air introduction section 13 may be provided on the tip side (ignition section 11 side) of the supply pipe 6 with respect to the gas introduction section 10.

Further, in the present embodiment, the two ammonia gas introduction units 12 and the two air introduction units 13 are provided in the supply pipe 6, but the number of the ammonia gas introduction units 12 and the air introduction units 13 is particularly 2. The number is not limited to one, and may be, for example, four or one.

Further, in the present embodiment, after the starting ammonia gas and the starting air are supplied to the gas introduction unit 10, the main ammonia gas is supplied to the ammonia gas introduction unit 12, and then the main air is supplied to the air introduction unit 13. However, it is not particularly limited to that form. The timing at which the main ammonia gas is supplied to the ammonia gas introduction unit 12 and the timing at which the main air is supplied to the air introduction unit 13 are the same as the timing at which the start-up ammonia gas and the start-up air are supplied to the gas introduction unit 10. May be.

Further, in the present embodiment, when the temperature of the reformer 5 detected by the temperature sensor 26 becomes equal to or higher than the specified temperature T1 (combustible temperature), the ammonia gas valve 18 and the air valve 19 are controlled to close. The form is not particularly limited, and for example, when the temperature of the reformer 5 becomes equal to or higher than the specified temperature T2 (reformable temperature), the ammonia gas valve 18 and the air valve 19 may be controlled to be closed.

FIG. 7 is a block diagram showing a reformer according to a second embodiment of the present invention. In FIG. 7, the reformer 4 of the present embodiment includes an ammonia gas introduction unit 32 and an air introduction unit 33 in place of the ammonia gas introduction unit 12 and the air introduction unit 13 of the first embodiment.

The ammonia gas introduction unit 32 is provided on the downstream side (reformer 5 side) of the gas introduction unit 10. The ammonia gas introduction section 32 extends in the radial direction of the supply pipe 6. Therefore, the starting ammonia gas is introduced into the inside of the supply pipe 6 in the radial direction of the supply pipe 6. The number of the ammonia gas introduction units 32 is not particularly limited to one, and may be two or more.

The air introduction unit 33 is provided on the downstream side of the ammonia gas introduction unit 32. The air introduction section 33 extends in the radial direction of the supply pipe 6 like the ammonia gas introduction section 32. Therefore, the starting air is introduced into the supply pipe 6 in the radial direction of the supply pipe 6. The number of air introduction units 33 is not particularly limited to one, and may be two or more.

In such an embodiment, it is not necessary to introduce the starting ammonia gas and the starting air into the supply pipe 6 in the tangential direction of the inner peripheral surface 6a of the supply pipe 6. Therefore, the degree of freedom in designing the ammonia gas introduction unit 32 and the air introduction unit 33 is improved.

In the present embodiment, the ammonia gas introduction unit 32 may be provided on the reformer 5 side of the air introduction unit 33 in the supply pipe 6, or the ammonia gas introduction unit 32 and the air introduction unit 33 may be provided in the supply pipe 6. It may be provided at the same position in the axial direction of. Further, the air introduction section 33 may be provided on the tip side (ignition section 11 side) of the supply pipe 6 with respect to the gas introduction section 10.

FIG. 8 is a flowchart showing the details of the procedure of the control process executed by the control unit 27 in the reforming system provided with the reforming apparatus according to the third embodiment of the present invention, and corresponds to FIG. ..

In the present embodiment, the reformer 5 has a combustion catalyst 7 and a reforming catalyst 8 as in the first embodiment described above. As the combustion catalyst 7 and the reforming catalyst 8, a catalyst such as a cobalt-based catalyst that oxidizes at room temperature and raises the temperature is used.

Further, in the present embodiment, the control unit 27 has a first control unit 28 and a second control unit 29, as in the first embodiment described above.

The first control unit 28 controls the ammonia gas valves 18 and 20 and the air valve 19 to open when the reformer 4 is started, controls the ignition unit 11 to ignite, and then detects the temperature sensor 26. When the temperature of the reformer 5 becomes equal to or higher than a predetermined temperature, the air valve 21 is controlled to open. The second control unit 29 controls to close the ammonia gas valve 18 and the air valve 19 after the control process by the first control unit 28 is executed.

In FIG. 8, when the start-up of the reformer 4 is instructed, the control unit 27 sequentially executes the procedures S101 to S103 in the same manner as in the first embodiment described above. As a result, starting ammonia gas is supplied to the gas introduction section 10 of the reformer 4 (see FIG. 9A), and starting air is supplied to the gas introduction section 10 (see FIG. 9B). ). Further, the main ammonia gas is supplied to the ammonia gas introduction unit 12 of the reformer 4 (see FIG. 9C).

Subsequently, the control unit 27 acquires the detected value of the temperature sensor 26 (procedure S105). Then, the control unit 27 determines whether or not the temperature of the reformer 5 is equal to or higher than the specified temperature T1 (see FIG. 9E) (procedure S106). The specified temperature T1 is the combustible temperature of the main ammonia gas. When the control unit 27 determines that the temperature of the reformer 5 is not equal to or higher than the specified temperature T1, the control unit 27 executes the procedure S105 again.

When the control unit 27 determines that the temperature of the reformer 5 is equal to or higher than the specified temperature T1, the control unit 27 controls to open the air valve 21 (procedure S104). As a result, the main air is supplied to the air introduction unit 13 of the reformer 4 (see FIG. 9D).

Subsequently, the control unit 27 controls to close the ammonia gas valve 18 and the air valve 19 (procedure S107). As a result, the supply of the starting ammonia gas to the gas introduction section 10 of the reformer 4 is stopped (see FIG. 9A), and the supply of the starting air to the gas introduction section 10 is stopped (FIG. 9). See (b)).

Then, the control unit 27 sequentially executes the procedures S108 to S110 as in the first embodiment described above.

Here, the first control unit 28 executes the above steps S101 to S106. The second control unit 29 executes the above steps S107 to S110.

In such an embodiment, ammonia gas and air as starting gas are introduced into the supply pipe 6 from the gas introduction unit 10, and the reformed ammonia gas is supplied from the ammonia gas introduction unit 12. After being introduced into the inside of 6, when the temperature of the reformer 5 becomes equal to or higher than the specified temperature T1, the air valve 21 is controlled to open. Therefore, even when the combustion catalyst 7 and the reforming catalyst 8 are easily oxidized, air is introduced into the supply pipe 6 from the air introduction unit 13 until the temperature of the reformer 5 reaches the specified temperature T1 or higher. Therefore, the combustion catalyst 7 and the reforming catalyst 8 are prevented from being oxidized and deteriorated. Further, when the temperature of the reformer 5 is equal to or higher than the specified temperature T1, the ammonia gas valve 18 and the air valve 19 are controlled to be closed. Therefore, the introduction of ammonia gas and air as starting gas into the inside of the supply pipe 6 is stopped at an appropriate time when the ammonia gas is burned and reformed. Therefore, it is further prevented that the ammonia gas is burned wastefully.

Also in this embodiment, when the temperature of the reformer 5 becomes equal to or higher than the specified temperature T2 (reformable temperature), the ammonia gas valve 18 and the air valve 19 may be controlled to be closed.

FIG. 10 is a schematic configuration diagram showing a reforming system including the reforming apparatus according to the fourth embodiment of the present invention. FIG. 11 is a block diagram showing a reformer according to a fourth embodiment of the present invention. In FIGS. 10 and 11, the reformer 4 of the present embodiment includes a reformer 5 and a supply pipe 6 as in the first embodiment described above.

The supply pipe 6 is provided with the gas introduction section 10 and the ammonia gas introduction section 12 according to the first embodiment. The supply pipe 6 is not provided with the air introduction unit 13 according to the first embodiment. Therefore, the gas introduction unit 10 introduces the starting ammonia gas, the starting air, and the main air into the inside of the supply pipe 6.

The reforming system 1 provided with such a reforming device 4 includes the ammonia gas flow paths 14 and 15, the air flow path 16, the ammonia gas valves 18 and 20, and the air valve 19 in the first embodiment described above. The reforming system 1 does not include the air flow path 17 and the air valve 21 in the first embodiment described above. Therefore, the air valve 19 controls the flow rates of the starting air and the main air introduced into the gas introduction unit 10.

In the present embodiment, the control unit 27 controls the ammonia gas valves 18 and 20 of the ammonia gas supply unit 22, the air valve 19 of the air supply unit 23, and the ignition unit 11 based on the detected value of the temperature sensor 26. The control unit 27 has a first control unit 28 and a second control unit 29, as in the first embodiment described above.

The first control unit 28 controls the ammonia gas valves 18 and 20 and the air valve 19 to be opened and controls the ignition unit 11 to be ignited when the reformer 4 is started. The second control unit 29 controls to close the ammonia gas valve 18 after the control process by the first control unit 28 is executed.

FIG. 12 is a flowchart showing the details of the procedure of the control process executed by the control unit 27 shown in FIG. 11, and corresponds to FIG.

In FIG. 12, when the start-up of the reformer 4 is instructed, the control unit 27 sequentially executes the procedures S101 to S103 in the same manner as in the first embodiment described above. As a result, the starting ammonia gas and air are supplied to the gas introduction section 10 of the reformer 4, and the main ammonia gas is supplied to the ammonia gas introduction section 12 of the reformer 4.

Subsequently, the control unit 27 sequentially executes the procedures S105 and S106 in the same manner as in the first embodiment described above. When the control unit 27 determines in the procedure S106 that the temperature of the reformer 5 is equal to or higher than the specified temperature T1, the control unit 27 controls to close the ammonia gas valve 18 (procedure S115). As a result, the supply of starting ammonia gas to the gas introduction unit 10 of the reformer 4 is stopped.

Subsequently, the control unit 27 sequentially executes the procedures S108 and S109 as in the first embodiment described above. When the control unit 27 determines in the procedure S108 that the temperature of the reformer 5 is equal to or higher than the specified temperature T2, the control unit 27 controls the opening degrees of the ammonia gas valve 20 and the air valve 19 (procedure S116). At this time, the opening degrees of the ammonia gas valve 20 and the air valve 19 are controlled so that the main ammonia gas and the air supply flow rate for performing an appropriate reforming operation are set by the reformer 5.

Here, the first control unit 28 executes the above procedures S101 to S103. The second control unit 29 executes the above procedures S105, S106, S115, S108, S109, and S116.

In such an embodiment, when the reformer 4 is started, the ammonia gas valve 18 and the air valve 19 are controlled to open, and then the ammonia gas valve 18 is controlled to close. Therefore, after the reformer 4 is started, the introduction of the ammonia gas as the starting gas into the inside of the supply pipe 6 is stopped, so that the ammonia gas as the starting gas is prevented from being burned wastefully. .. Further, since the air introduction unit 13 that introduces air into the supply pipe 6 becomes unnecessary, the air valve 21 that controls the flow rate of the air supplied to the air introduction unit 13 becomes unnecessary. Therefore, the configuration of the air supply unit 23 can be simplified.

In this embodiment as well, the timing at which the main ammonia gas is supplied to the ammonia gas introduction unit 12 may be the same as the timing at which the starting ammonia gas and air are supplied to the gas introduction unit 10.

Further, when the temperature of the reformer 5 becomes equal to or higher than the specified temperature T2 (reformable temperature), the ammonia gas valve 18 may be controlled to be closed.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the above embodiment, the gas introduction unit 10 introduces ammonia gas and air into the supply pipe 6 in the tangential direction of the inner peripheral surface 6a of the supply pipe 6, but is particularly limited to such a form. Absent. If ammonia gas and air are introduced so as to generate a tubular flow inside the supply pipe 6, the gas introduction portion 10 may be arranged so as to be offset from the tangential direction of the inner peripheral surface 6a of the supply pipe 6. Good.

Further, in the above embodiment, the mixed gas of ammonia gas and air is introduced into the inside of the supply pipe 6 from all four gas introduction units 10, but the present embodiment is not particularly limited, and for example, two gas introduction units. Only ammonia gas may be introduced into the supply pipe 6 from 10 and only air may be introduced into the supply pipe 6 from the remaining two gas introduction portions 10.

Further, in the above embodiment, the supply pipe 6 is provided with four gas introduction units 10, but the number of gas introduction units 10 is as long as ammonia gas and air are introduced into the supply pipe 6. In particular, the number is not limited to four, and may be two or one.

Further, in the above embodiment, the ammonia gas valve 18 and the air valve 19 are controlled to close when the temperature of the reformer 5 detected by the temperature sensor 26 becomes equal to or higher than the specified temperature. It is not necessary to use the temperature sensor 26 that detects the temperature, and the temperature of the reformer 5 may be estimated from, for example, the flow rate of ammonia gas, the flow rate of air, the time, and the room temperature.

Further, in the above embodiment, the reformer 5 has a combustion catalyst 7 for burning ammonia gas and a reforming catalyst 8 for decomposing ammonia gas into hydrogen, but the present invention is not particularly limited to that form. .. The reformer 5 may have a combustion reforming catalyst having a function of burning ammonia gas and a function of decomposing ammonia gas into hydrogen.

Further, in the above embodiment, ammonia gas is used as the fuel gas, but the present invention can also be applied to a reforming apparatus and a reforming system using a hydrocarbon gas or the like as the fuel gas.

Further, in the above embodiment, air is used as the oxidizing gas, but the present invention is also applicable to a reforming apparatus and a reforming system using oxygen as the oxidizing gas.

1 ... reforming system, 4 ... reforming device, 5 ... reformer, 6 ... supply pipe, 7 ... combustion catalyst (catalyst), 8 ... reforming catalyst (catalyst), 10 ... gas introduction section (first gas introduction) Part), 11 ... Ignition part, 12 ... Ammonia gas introduction part (second gas introduction part), 13 ... Air introduction part (third gas introduction part), 18 ... Ammonia gas valve (first fuel gas valve), 19 ... Air valve (1st oxidizing gas valve), 20 ... Ammonia gas valve (2nd fuel gas valve), 21 ... Air valve (2nd oxidizing gas valve), 22 ... Ammonia gas supply unit (fuel gas supply unit), 23 ... Air supply unit ( Oxidizing gas supply unit), 26 ... Temperature sensor (temperature detection unit), 27 ... Control unit, 28 ... 1st control unit, 29 ... 2nd control unit, 32 ... Ammonia gas introduction unit (1st gas introduction unit), 33 ... Air introduction section (second gas introduction section), T1 ... Specified temperature.

Claims (11)

A reformer that reforms the fuel gas by using the heat generated by burning the fuel gas with the oxidizing gas.
A supply pipe connected to the reformer and through which a gas containing the fuel gas and the oxidizing gas supplied to the reformer flows.
A first gas introduction section provided in the supply pipe and introducing the fuel gas and the oxidizing gas so as to generate a tubular flow inside the supply pipe.
An ignition unit attached to the supply pipe and igniting the fuel gas introduced into the inside of the supply pipe from the first gas introduction unit.
A reformer provided on the reformer side of the supply pipe with respect to the first gas introduction section, and including a second gas introduction section for introducing the fuel gas into the inside of the supply pipe. The reforming apparatus according to claim 1, further comprising a third gas introduction unit provided in the supply pipe and introducing the oxidizing gas into the inside of the supply pipe. The reformer according to claim 2, wherein the third gas introduction unit is provided on the reformer side of the second gas introduction unit in the supply pipe. The reforming device according to claim 3, wherein the first gas introduction unit introduces the fuel gas and the oxidizing gas into the inside of the supply pipe in the tangential direction of the inner peripheral surface of the supply pipe. The second gas introduction unit introduces the fuel gas into the supply pipe in the tangential direction of the inner peripheral surface of the supply pipe.
The reforming apparatus according to claim 4, wherein the third gas introduction unit introduces the oxidizing gas into the supply pipe in the tangential direction of the inner peripheral surface of the supply pipe. With the reformer
A fuel gas supply unit that supplies fuel gas to the reformer and
The reformer is provided with an oxidizing gas supply unit that supplies the oxidizing gas.
The reformer
A reformer that reforms the fuel gas by utilizing the heat generated by burning the fuel gas with the oxidizing gas.
A supply pipe connected to the reformer and through which a gas containing the fuel gas and the oxidizing gas supplied to the reformer flows.
A first gas introduction section provided in the supply pipe and introducing the fuel gas and the oxidizing gas so as to generate a tubular flow inside the supply pipe.
An ignition unit attached to the supply pipe and igniting the fuel gas introduced into the inside of the supply pipe from the first gas introduction unit.
A reforming system including a second gas introduction section provided on the reformer side of the supply pipe with respect to the first gas introduction section and for introducing the fuel gas into the inside of the supply pipe. The reforming system according to claim 6, further comprising a third gas introduction unit provided in the supply pipe and introducing the oxidizing gas into the inside of the supply pipe. A control unit for controlling the fuel gas supply unit, the oxidizing gas supply unit, and the ignition unit is further provided.
The fuel gas supply unit controls a first fuel gas valve that controls the flow rate of the fuel gas supplied to the first gas introduction unit, and a first fuel gas valve that controls the flow rate of the fuel gas supplied to the second gas introduction unit. Has 2 fuel gas valves
The oxidizing gas supply unit includes a first oxidizing gas valve that controls the flow rate of the oxidizing gas supplied to the first gas introduction unit, and a flow rate of the oxidizing gas supplied to the third gas introduction unit. Has a second oxidizing gas valve to control
The control unit controls to open the first fuel gas valve, the first oxidizing gas valve, the second fuel gas valve, and the second oxidizing gas valve when the reformer is started, and also controls the ignition unit. A first control unit that controls to ignite, and a second control unit that controls to close the first fuel gas valve and the first oxidizing gas valve after the control process by the first control unit is executed. The reforming system according to claim 7. A temperature detector for detecting the temperature of the reformer is further provided.
After the control process by the first control unit is executed, the second control unit performs the first fuel when the temperature of the reformer detected by the temperature detection unit becomes equal to or higher than a predetermined predetermined temperature. The reforming system according to claim 8, wherein the gas valve and the first oxidizing gas valve are controlled to be closed. A temperature detector for detecting the temperature of the reformer is further provided.
The reformer has a catalyst for burning the fuel gas.
The first control unit controls to open the first fuel gas valve, the first oxidizing gas valve, and the second fuel gas valve, controls to ignite the ignition unit, and then uses the temperature detection unit. The reforming system according to claim 8, wherein when the detected temperature of the reformer becomes equal to or higher than a predetermined predetermined temperature, the second oxidizing gas valve is controlled to open. A control unit for controlling the fuel gas supply unit, the oxidizing gas supply unit, and the ignition unit is further provided.
The fuel gas supply unit controls a first fuel gas valve that controls the flow rate of the fuel gas supplied to the first gas introduction unit, and a first fuel gas valve that controls the flow rate of the fuel gas supplied to the second gas introduction unit. Has 2 fuel gas valves
The oxidizing gas supply unit has an oxidizing gas valve that controls the flow rate of the oxidizing gas supplied to the first gas introduction unit.
The control unit controls to open the first fuel gas valve, the second fuel gas valve, and the oxidizing gas valve when the reformer is started, and controls to ignite the ignition unit. The reforming system according to claim 6, further comprising a unit and a second control unit that controls to close the first fuel gas valve after the control process by the first control unit is executed.

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