JP4267672B2 - Burner and reformer with burner - Google Patents

Description

  The present invention relates to a burner suitable for facilitating mixing of air and fuel and performing complete combustion when performing diffusion combustion in a burner, and a reformer including the burner.

  Recent fuel cells, such as polymer electrolyte fuel cells, can be compact in shape, have high output power density, and simplify the fuel cell system to facilitate operation. It is considered promising as a residential power supply system in the future.

  In addition to the use of a home residential power supply system, this type of device is also being studied and proposed for use in air conditioning systems and cogeneration systems that use exhaust heat generated after power generation.

  By the way, there are many types of fuel cells according to the classification of electrolytes. For example, solid polymer fuel cells generate exhaust heat of about 100 ° C. or less together with the generation of electric energy. This means that heat is generated as heat from the high battery temperature to the ambient temperature unless the battery efficiency reaches 100%, that is, unless the battery body temperature remains at the ambient temperature and power generation operation becomes possible. ing.

  On the other hand, in a fuel processing system for reforming fuel to hydrogen, since a combustor is usually used for heating a reforming reaction of a reformer or the like, exhaust heat is generated from combustion exhaust gas, a fuel processing device, or the like. These exhaust heats are suitable for hot water use such as hot water supply and bath, and if there is much heat recovery, it is possible to improve the overall efficiency to nearly 80% by combining electricity and heat.

  In addition, the cogeneration system is more energy efficient than the conventional grid power use because it is more energy efficient, energy saving, friendly to the global environment, and can be operated more economically.

  In the fuel cell system that effectively uses the exhaust heat described above, when the fuel is, for example, city gas mainly composed of methane or LPG mainly composed of propane, reforming for reforming these fuels to hydrogen. Is required, and the reformer requires a combustion device that heats to activate the reforming catalyst.

  In that case, a burner is required for the combustion apparatus.

  As shown in FIGS. 8 and 9, the conventional burner 36 has, for example, a circular fuel injection port 37 in the center and an air injection port 38 formed in an annular port, for example, in a concentric position outside the center. It was a so-called single hole type in which diffusion combustion is performed by one fuel jet 37 and one air jet 38 provided.

  However, in this single hole type, since air flows only around the outside of the fuel F, it is difficult to mix the fuel F and air well, and methane gas fuel or propane gas fuel with different combustion speeds and hydrogen It was difficult to completely burn the fuel with the same burner, and it was necessary to divide it into a start burner and a main burner. That is, a start-up burner and a main burner before power generation operation targeting city gas or LPG fuel are installed separately, and when the operation shifts to power generation operation, the reforming catalyst 24 is replaced by another main burner using hydrogen rich gas as fuel. It was necessary to heat.

  In addition, the conventional burner is operated with only one type having both functions, when used for starting before power generation operation and when used for power generation. There are cases.

  In the case of the former operation, the reason for switching between the two types of burners is that the main fuel is city gas or propane at start-up, hydrogen is generated at the time of power generation, and the combustion speed is different. Based on the difficulty of securing a flame.

In the case of two types of burners that are switched between startup and power generation, when a power generation operation is performed using hydrogen fuel, a so-called single-hole burner having a single jet outlet with a simple structure has been used. Recently, for example, as seen in Japanese Patent Application Laid-Open No. 10-162850, a diffusion burner for mixing the outside of the fuel with air has been proposed.
Japanese Patent Laid-Open No. 10-162850

  The single-hole type burner that has been used for a long time and the diffusion burner disclosed in Japanese Patent Laid-Open No. 10-162850 have several problems, one of which is not necessarily high in combustion efficiency. Was in the point.

  That is, the burner used for power generation has poor mixing with air because the fuel mainly containing hydrogen contains water vapor. For this reason, unburned gas components, such as CO and hydrogen, by incomplete combustion increase.

  In addition, when the amount of unburned gas components increases, the combustion efficiency of the combustion device incorporated in the reformer deteriorates, and an exhaust gas purification device or the like must be provided to reduce unburned gas. Needless to say, the increase in operation cost has a problem and inconvenience, such as requiring a lot of labor for its operation and maintenance.

  The present invention has been made based on such circumstances, and can further increase the combustion efficiency of the burner and ensure stable diffusion combustion with a common burner even when fuels having different combustion rates are used. An object of the present invention is to provide a burner and a reformer equipped with the burner.

  Another object of the present invention is to use a common burner when used for starting before power generation and when used for power generation, and can use a common burner for start-up operation and power generation operation. And a reformer with a burner can be provided.

  Furthermore, another object of the present invention is provided with a burner and a burner that further improve the power generation efficiency by promoting the mixing of fuel and air more effectively even when water vapor is contained in the fuel mainly composed of hydrogen. It is to provide a reformer.

  In order to solve the above-described problems, the burner according to the present invention includes a fuel jet for ejecting fuel to the burner body, and an air jet for ejecting air on the inner and outer peripheral sides of the fuel jet, respectively. In addition, fuels having different combustion speeds at the time of start-up and operation are jetted from the fuel outlets to be diffused and combusted, and the burner main body is used in common.

  Further, in order to solve the above-described problems, a reformer provided with a burner according to the present invention is provided with a burner in a combustion section of a hydrogen production apparatus, and a fuel injection port for injecting fuel into the burner, and the fuel injection port. An air jet for ejecting air on the inner peripheral side and the outer peripheral side of the outlet, respectively, and in the start-up operation, the premixed fuel in which air is added in advance to the fuel jetted from the fuel jet port is injected, Air is ejected from the inner and outer peripheral sides of the fuel and diffused and burned. During power generation operation, hydrogen-rich fuel gas is jetted from the fuel jet and air is jetted from the air outlet and diffused and burned. The common burner is set to be used for both start-up operation and power generation operation.

  The burner and the reformer equipped with the burner according to the present invention share a burner when used for starting before power generation and when used for power generation, and support the start-up operation and power generation operation with the shared burner. It is possible to further increase the combustion efficiency of the burner and to ensure stable diffusion combustion.

  Embodiments of a burner and a reformer equipped with the burner according to the present invention will be described below with reference to the drawings and reference numerals attached to the drawings.

  FIG. 1 is a schematic system diagram showing a fuel cell system including a reformer according to the present invention.

  In this fuel cell system 21, a case where a solid polymer fuel cell is applied to the fuel cell body 2 as an example will be described.

  The fuel cell system 21 is roughly configured to include a fuel processing system (FPS) 1 and a battery main body (CSA; Cell Stack Assembly) 2.

  The fuel processing system 1 includes a fuel unit 3, a desulfurizer 4, a reformer 6 as a hydrogen production device, a CO shift reactor 7, a CO selective oxidizer 8, and the like in order along the flow of the fuel F. The fuel processing system 1 has a combustion section 5a and a steam generation section 5b integrated into the reformer 6, and the fuel cell system 21 further includes a steam separator 9, a reforming water tank 10, an improved A quality water pump 11, a waste heat exchanger 12, a waste heat supply water pump 13 and the like are provided.

  The fuel F supplied from the fuel unit 3 to the desulfurizer 4 is appropriately selected from hydrocarbon-based fuels such as city gas, propane, or gasified kerosene.

  On the other hand, the battery body 2 includes an anode 14, a cathode 15, a water cooling unit 16, a battery cooling water pump 17, and the like.

  Further, components common to the fuel processing system 1 and the battery body 2 are provided with an air blower 18, a condensation heat exchanger 19, and the like.

  The principle of power generation of the polymer electrolyte fuel cell having such a configuration will be briefly described.

  For example, when propane is selected from the fuel F such as propane or city gas, reforming from propane to hydrogen gas is performed in the fuel processing system 1.

  First, when the fuel F for selecting propane passes through the desulfurizer 4, the sulfur content is removed by, for example, activated carbon or zeolite adsorption, and is combined with the water vapor separated from the water vapor separator 9. It is supplied to the reformer 6.

  The steam separator 9 heats water supplied from the reforming water tank 10 through the reforming water pump 11 and the water supply system 11a by the steam generating unit 5b, and supplies the steam to the reformer 6 as steam. Here, the fuel F is joined. In addition, the water vapor separator 9 collects the drain water separated from the water vapor in the reforming water tank 10 through the water recovery system 11b.

On the other hand, in the reformer 6, a steam reforming reaction is performed by the reforming catalyst (see reference numeral 21 in FIG. 2) with the supplied fuel (propane) F and steam, and in addition to hydrogen gas, CO, CO _2, etc. Is also generated. At that time, the steam reforming becomes an endothermic reaction. For this reason, the reformer 6 incorporates the combustion part 5a which ensures a heat source with the water vapor generation part 5b in one container.

By the way, in the polymer electrolyte fuel cell, when the reformed CO concentration of the fuel gas supplied to the anode 14 is high, a membrane electrode assembly (MEA) composed of an electrolyte membrane, a catalyst layer and the like constituting a part of the battery body 2 is used. ; Membrane Electrode Assembly (hereinafter referred to as MEA) (not shown) is poisoned, resulting in an adverse effect such as a decrease in activity and a marked decrease in battery performance. For this reason, CO must be oxidized to CO ₂ in advance.

  The fuel processing system 1 includes a CO shift reactor 7 and a CO selective oxidizer 8 on the downstream side of the reformer 6, and supplies air from the air blower 18 to the CO selective oxidizer 8. Of the generated reformed gas, while CO flows through the CO shift reactor 7 and the CO selective oxidizer 8, the oxidation is promoted by the catalytic reaction of each catalyst (not shown).

  Although not shown, the catalytic reaction temperatures of the reformer 6 and the CO selective oxidizer 8 are different from each other, from several hundred degrees of the reformer 6 to hundreds of degrees of the CO selective oxidizer 8, and upstream of the reformed gas. In fact, a water heat exchanger for lowering the temperature on the downstream side is necessary, for example, a water heat exchanger is provided between the CO shift reactor 7 and the CO selective oxidizer 8. It may be configured.

For example, when reforming the propane of the fuel F, the steam reforming that omits the oxidation reaction from CO to CO ₂ and passes through the whole is based on the following equation (1).
[Chemical 1]
C ₃ H ₈ + 6H ₂ O → to 3CO ₂ + 10H ₂ (1)

  The reformed gas that passes through the CO selective oxidizer 8 is mainly composed of components such as hydrogen, carbon dioxide, and water vapor. When these gases are supplied to the anode 14 of the battery body 2, the proton gas H + flows through the electrolyte membrane (not shown) through the catalyst layer (not shown) of the membrane electrode assembly MEA, and the air blower 18. Is combined with oxygen and electrons in the air flowing from the cathode to the cathode 15 to generate water.

  Therefore, the anode 14 has a negative (−) pole and the cathode 15 has a positive (+) pole, and generates DC power with a potential. When an electric load is present between these potentials, a function as a power source can be provided.

  On the other hand, the gas that exits from the outlet of the anode 14 that does not contribute to power generation is used as a heating fuel gas for the combustion section 5a, the steam generation section 5b, and the like via the unburned gas system 20.

  Further, the water vapor coming out from the outlet of the cathode 15 merges with the combustion gas from the water vapor generating section 5b, and after the water is recovered by the condensation heat exchanger 19, the water is supplied to the reforming water tank 10 to produce fuel. Water independence in the battery system 21 is intended.

  Since the reaction temperature at the catalyst in the membrane electrode assembly MEA of the battery body 2 is normally less than a hundred degrees, the cooling water is circulated by the battery cooling water pump 17 so that the temperature of the battery body 2 is lower than that. Then, the heat is dissipated by the exhaust heat exchanger 12 and is controlled by an electric control unit (not shown) so that the inlet side cooling water temperature of the battery body 2 is constant.

  The medium such as high-temperature water or high-temperature antifreeze supplied from the water cooling unit 16 of the battery body 2 to the exhaust heat exchanger 12 is used as a heating source here, and the water from the exhaust heat supply water pump 13 is used. Heat the water and warm the water. The heated water is supplied to, for example, a water heater or the like and used as hot water or hot water for a bath.

  In order to simplify the polymer electrolyte fuel cell system, the exhaust heat supply water pump 13 is used instead of the exhaust heat exchanger 12, and the battery cooling water pump 17 of the fuel processing system 1 is used directly. It may be supplied to a water heater or the like.

  2 and 3 are conceptual diagrams of the fuel cell system 21 according to the present invention, showing the combustion section 5a and the steam generation section 5b integrated into the reformer 6. As shown in FIG.

  2 is a schematic longitudinal sectional view of the reformer 6 showing a part of the fuel cell system 21, and FIG. 3 is a cut sectional view of the burner 23 cut from the direction of arrows AA in FIG. .

  A fuel cell system 21 shown in FIG. 2 includes a reformer 6 constituting a hydrogen production apparatus (combustion apparatus) in which a combustion unit 5a and a steam generation unit 5b are housed in a single container 22 and are integrally configured. It is.

  The combustion unit 5 a includes a burner 23 on the head side of the container 22, for example, and forms a combustion chamber 25 covered with a reforming catalyst 24 on the wall surface side in the container 22.

  The combustion apparatus of the fuel cell system 21 includes a battery body 2 that generates electricity by chemically reacting air with a fuel mainly composed of hydrogen generated from the hydrogen production apparatus 6 of the fuel processing system 1. A burner 23 provided in the combustion section 5a of the hydrogen production apparatus 6 is provided on each of a fuel jet 31 for jetting fuel, and an inner diameter side (inner circumference side) and an outer diameter side (outer circumference side) of the fuel jet outlet 31. And provided with air jets 30 and 32 for jetting air, and facing the combustion chamber 25 with fuel and air jetted from the fuel jet 31 and the air jets 30 and 32 in the direction of gravity. It is the structure which makes it eject.

  In addition, when the combustion unit 5a provided in the hydrogen production device 6 of the fuel cell system 21 shifts from the start operation before power generation to the power generation operation, air is previously added to one of the fuels of city gas and LPG. A burner 23 that can automatically switch from premixed fuel to combustion gas generation of fuel mainly composed of hydrogen is provided.

  In addition, the container 22 is formed with a compartment 27 that is partitioned by a heat insulating member 26 such as glass wool on the downstream side of the combustion chamber 25. The container 22 is surrounded by a heat insulating member 28 in the compartment 27, and a heat transfer tube 29a is provided. A water vapor generating part 5b arranged as a group is provided.

  Furthermore, the container 22 is provided with a water vapor generating part 5b on the outer side thereof, which is a jacket type and arranges the heat transfer tubes 29b as a group.

  On the other hand, the burner 23 provided, for example, on the head side of the container 22 is, for example, a first air outlet 30 having a circular hole and a concentric position on the outer side, and in a radial direction with respect to the burner axial direction CL. A plurality of fuel injection ports 31 that are, for example, circular holes formed at an oblique inclination angle α toward the (transverse direction), and a second air injection port 32 that is formed, for example, in an annular hole at an outer concentric position. It has. In this case, the first air jet 30 and the second air jet 32 are designed to have the same opening area and the same air jet flow velocity.

  Next, in the fuel cell system having such a configuration, a mechanism for generating combustion gas based on fuel and air ejected from the burner 23 to the combustion chamber 25 will be described.

  First, during the start-up operation before power generation, the fuel cell system 21 “closes” the process fuel valve 33 provided on the inlet side of the desulfurizer 4 in FIG. 1, and the start-up fuel valve provided on the inlet side of the combustion unit 5a. 34 is "open", the start-up air valve 35 provided on the outlet side of the air blower 18 is "open", and the air blower is supplied to the fuel supplied from the fuel section 3 via the start-up fuel valve 34, for example, propane. Air from 18 is added and premixed, and the premixed fuel gas is supplied to the combustion section 5a, and combustion air is supplied from the air blower 18 to the combustion section 5a.

  As shown in FIGS. 2 and 3, the premixed fuel gas and combustion air supplied to the combustion unit 5 a are respectively connected to the fuel outlet 31, the first and second air outlets 30 and 32 of the burner 23. And is then ignited by an ignition device (not shown) to form a flame.

  The flame diffuses and burns in the combustion chamber 25, effectively heats the reforming catalyst 24, and raises the catalyst temperature necessary for reforming the fuel to activate the reforming catalyst 24.

  Further, the combustion gas that has entered the compartment 27 heats the heat transfer tubes 29a and 29a of the water vapor generating section 5b, evaporates the water in the tubes, and turns it into steam.

  At the inlet 25a of the combustion chamber 25, a mixed gas of the fuel F from the desulfurizer 4 and the water vapor from the water vapor separator 9 shown in FIG. 1 is supplied, the temperature of the mixed gas rises, and eventually the combustion section 5a The thermal equipment such as the CO shift reactor 7, the CO selective oxidizer 8, and the water vapor separator 9 connected to the reforming catalyst 24 and the outlet 25 b of the combustion chamber 25 in the vessel 22 of the vessel 22 supplies the reformed gas to the fuel cell body 2. When the temperature required for supplying the anode 14 is reached, the fuel cell system 21 starts the reforming of the fuel F by opening the process fuel valve 33 while keeping the starting fuel valve 34 “open”. Then, when the process gas supplied to the anode 14 is rich in hydrogen and the CO concentration becomes low, the power generation operation is started.

  During the power generation operation, the unreacted fuel gas is returned to the combustion section 5a of the reformer 6 through the unburned gas system 20 from the outlet of the anode 14 as an off gas. The off-gas fuel returned to the combustion section 5a and the raw fuel from the starting fuel valve 34 are joined through the fuel section 3 and burnt, immediately increasing the load on the combustion chamber 25 of the combustion section 5a and increasing the temperature. Then, the starting fuel valve 34 and the starting air valve 35 are closed. And the combustion chamber 25 of the combustion part 5a is drive | operated only with the offgas fuel from the unburned gas system 20, and transfers at the time of an electric power generation driving | operation.

  During the power generation operation, a hydrogen rich gas containing water vapor, carbon dioxide gas, and methane gas is ejected from the fuel outlet 31 of the burner 23 into the combustion chamber 25 of the combustion section 5a, and at the same time, combustion air necessary for diffusion combustion is the first. The air is blown out through the air outlet 30 and the second air outlet 32. The hydrogen-rich gas and air ejected from each of the ejection ports 31, 30, and 32 are mixed to generate a combustion gas, and diffusely burn in the direction of gravity (downstream side) of the combustion chamber 25.

  In this way, the air is mixed with the fuel F, and the burner 23 that diffuses and burns in the combustion chamber 25 is centered, for example, at the first air outlet 30 formed with a single hole in the shape of a circular hole, at the outer concentric position. For example, the burner 23 is provided with a plurality of fuel injection ports 31 formed in a circular hole shape, and a second air injection port 32 formed in, for example, an annular port at a concentric position on the outer side.

  The burner 23 according to the present embodiment has a first air outlet 30 formed, for example, in a single hole in the center of the burner body 23a, at a concentric position on the outer peripheral side, and with respect to the burner axial direction CL. For example, a plurality of circular hole-shaped fuel injection ports 31 formed at an oblique inclination angle α inward in the radial direction, and the second air formed at, for example, an annular hole at a concentric position on the outer peripheral side. Each of the nozzles 32 is provided so that the fuel F gathers in the center, and the inner air and the outer air flow around the fuel F, as if the fuel was sandwiched with the air (sandwich burner). Therefore, the subdivision of the flame is sufficiently achieved. This has the same effect as a burner with a plurality of small single holes, so that the mixture of air and fuel is good, the combustion reaction is sufficiently accelerated even if it contains water vapor, and the length of the flame is shortened. be able to.

  In fact, it has been confirmed through experiments that the flame length of the burner 23 according to the present embodiment is less than half the flame length of the conventional single hole type burner 36.

  When the flame length is shorter than the conventional one, it indicates that the diffusion combustion reaction is completed more quickly. In addition, the average combustion temperature in the flame region is increased by the amount of the short flame, and the transfer of heat to the reforming catalyst 24 in the combustion chamber 25 is extremely effective with very little loss.

  In addition, the combustion unit 5a according to the present embodiment arranges the reforming catalyst 24 on the wall surface side of the combustion chamber 25, and the fuel F from the desulfurizer 4 and the steam from the steam separator 9 shown in FIG. Since the mixed process fuel gas flows in the direction of gravity and the combustion gas from the burner 23 flows in a counterflow manner, heat dissipation to the reforming catalyst 24 is reduced by reducing heat dissipation loss to the outside. This can be done even more effectively.

  Further, the combustion section 5a according to the present embodiment has, for example, a circular hole-shaped first air outlet 30 at the center, and a plurality of circular hole-shaped fuel outlets 31, for example, at concentric positions on the outer side. Further, a burner 23 having, for example, a second air outlet 32 formed in one of a plurality of circular holes and annular holes is provided at a concentric position on the outer side, and fuel F such as city gas or LPG and hydrogen Even if the combustion speed of the rich gas differs greatly, it is possible to cope with it sufficiently, so as before, prepare multiple burners for start-up operation and power generation operation according to the number of fuel types. In addition, the combustion chamber 25 can be simplified and air and fuel can be mixed well, the diffusion combustion can be further promoted, and the reforming catalyst 24 can be activated earlier.

  In addition, when fuels having different combustion speeds are used, the flame may extend excessively during the diffusion combustion during the start-up operation before the power generation operation, and the combustion may become unstable. In this case, the fuel is ejected from the fuel outlet 31. A stable flame can be secured if premixing is performed by adding air to the fuel in advance, and insufficient air is ejected from the first air outlet 30 and the second air outlet 32.

  In addition, although the combustion part 5a which concerns on this embodiment provides the six fuel jet ports 31 formed in the burner main body 23a of the burner 23 in the concentric position of the outer side of the 1st air jet port 30, it is not restricted to this example. Instead, for example, as shown in FIGS. 6 and 7, the fuel injection port 31 formed at a concentric position outside the first air injection port 30 may be an annular hole. Further, for example, as shown in FIGS. 8 and 9, the first air outlet 30 may be an annular hole.

  A burner and a reformer equipped with a burner according to the present invention include a fuel outlet for ejecting fuel to a burner provided in a combustion section, and an air outlet on each of an inner diameter side and an outer diameter side of the fuel outlet. Even if fuels with different combustion rates are formed, they can be dealt with by a common burner, and a stable flame of diffusion combustion can be ensured regardless of the start-up operation before the power generation operation and the power generation operation. Based on the further promotion of mixing, complete combustion can be performed to further improve power generation efficiency.

1 is a schematic system diagram showing an embodiment of a fuel cell system. The schematic longitudinal cross-sectional view of the reformer which shows 1st Embodiment of this invention and shows a part of fuel cell system. FIG. 3 is a cross-sectional view of the burner cut from the direction of arrows AA in FIG. 2. The schematic plan view which shows 2nd Embodiment of the burner applied to the combustion apparatus with which the reformer of a fuel cell system is equipped. Sectional drawing of the burner cut | disconnected from the CC arrow direction of FIG. The schematic system diagram which shows a state. The schematic top view which shows 3rd Embodiment of the burner applied to a combustion apparatus among fuel cell systems. Sectional drawing of the burner cut | disconnected from the DD arrow direction of FIG. The schematic plan view which shows the conventional burner. FIG. 9 is a cross-sectional view of the burner cut from the direction of arrows BB in FIG. 8. The schematic system diagram which shows a state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fuel processing system 2 Battery main body 3 Fuel part 4 Desulfurizer 5a Combustion part 5b Water vapor generation part 6 Reformer (combustion device)
7 CO shift reactor 8 CO selective oxidizer 9 Steam separator 10 Reforming water tank 11 Reforming water pump 11a Water supply system 11b Water recovery system 12 Waste heat exchanger 13 Waste heat supply water pump 14 Anode 15 Cathode 16 Water Cooling unit 17 Battery cooling water pump 18 Air blower 19 Condensing heat exchanger 20 Unburned gas system 21 Fuel cell system 22 Container 23 Burner 23a Burner body 24 Reforming catalyst 25 Combustion chamber 25a Inlet 25b Outlet 26 Insulating member 27 Compartment chamber 28 Insulating Members 29a, 29b Heat transfer tube 30 First air outlet 31 Fuel outlet 32 Second air outlet 33 Process fuel valve 34 Startup fuel valve 35 Startup air valve 36 Burner 37 Fuel outlet 38 Air outlet

Claims (5)

A fuel jet for ejecting fuel to the burner body, and an air jet for ejecting air on the inner and outer peripheral sides of the fuel jet, respectively, are provided with fuel having different combustion speeds during startup and operation. A burner characterized by having a structure in which a burner main body is shared by being ejected from an outlet and subjected to diffusion combustion. The fuel jet is formed by a plurality of jet holes or annular holes provided along the circumferential direction, and the air jet provided on the inner peripheral side of the fuel jet is a single circular hole or an annular hole at the center. 2. The burner according to claim 1, wherein the first air injection port and the air injection port on the outer peripheral side of the fuel injection port are a plurality of injection holes or a second air injection port having an annular hole. 3. The burner according to claim 2, comprising the first air outlet at the center and a plurality of fuel injection ports formed concentrically with respect to the burner axial direction at the outer concentric position. A burner is installed in the combustion section of the hydrogen production device,
A fuel outlet for injecting fuel into the burner, and an air outlet for injecting air on the inner and outer peripheral sides of the fuel outlet,
During start-up operation, premixed fuel in which air is added in advance to the fuel ejected from the fuel ejection port is injected, while air is ejected from the inner peripheral side and the outer peripheral side of the premixed fuel to perform diffusion combustion,
During power generation operation, hydrogen-rich fuel gas is ejected from the fuel ejection port, while air is ejected from the air ejection port and diffused and burned, and a common burner is used for both startup operation and power generation operation. A reformer equipped with a burner characterized by the above. The burner is provided at the head of the container of the hydrogen production apparatus, and the fuel outlet and the air outlet of the burner face the combustion chamber covered with the reforming catalyst in the head of the container, and the fuel injection The reformer provided with the burner according to claim 4, wherein fuel and air ejected from the outlet and the air ejection port are ejected in the direction of gravity.

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