Hydrogen burner forming flat flame and control method thereof

Abstract

Disclosed in the present invention are: a hydrogen burner forming a flat flame, in which a plurality of nozzles are arranged on a plane, allowing formation of a flame having a shape corresponding to the plane, in front of the plane; and a control method capable of preventing the backfire phenomenon of the hydrogen burner.

Description

Hydrogen burner forming a flat flame and a control method thereof

[0001] The present invention relates to a burner that uses hydrogen to form a flame and provides thermal energy to a heated object, such as a heat exchanger, applied to equipment such as a boiler, furnace, or drying device, and a method for controlling the same.

[0002] A combustion burner refers to a device that forms a flame through the oxidation of fuel and air to provide thermal energy to a heated object, such as a heat exchanger, applied to equipment like boilers, furnaces, or drying devices.

[0003] Generally, burners have a cylindrical shape and utilize a combustion method in which a flame ignited from a single nozzle or diffused to other adjacent radial arrays of nozzles is used. However, burners with this structure form a long flame with a very high jet velocity, resulting in a long flame, high noise, and a large combustion chamber volume.

[0004] In addition, when attempting to increase capacity, there are difficulties in designing and manufacturing nozzles and other parts with different geometric shapes, and when attempting to heat a large surface area of ​​a heat exchanger, there is a problem of reduced thermal efficiency.

[0005] In addition, there is a problem of high levels of nitrogen oxides (NOx) generated due to the long flame and high average flame temperature, and high levels of carbon monoxide (CO) are produced due to incomplete combustion caused by the limited uniform mixing of fuel and air.

[0006] Furthermore, when using fuels with high flame temperatures, such as hydrogen, there is a very high possibility of flashback occurring, which causes the flame to propagate upstream due to the imbalance in air and fuel flow rates, leading to burner failure and the risk of fire.

[0007] Furthermore, when attempting to transfer heat through a flame to a large-area object to be heated, multiple burners must be installed. Even in this case, from the perspective of controlling the combustion burners, if the fuel ejection velocity and combustion velocity of each burner are unbalanced, it can lead to poor heating characteristics and reduced heat transfer efficiency.

[0008] To solve these problems, a combustion burner structure in which nozzles are arranged in a planar configuration can be considered to supply relatively uniform thermal energy to the equipment and, in the process, form a planar flame that is easy to control.

[0009] One objective of the present invention is to provide a hydrogen burner that forms a flat flame.

[0010] Another objective of the present invention is to provide a structure for a hydrogen burner that uniformly supplies fuel and air in order to more easily form a flat flame.

[0011] Another objective of the present invention is to provide a control method capable of preventing flashback of a hydrogen burner forming a flat flame as described above.

[0012] To achieve the objective of the present invention, a structure in which nozzles are arranged on a plane is presented to form a planar flame according to one embodiment of the present invention.

[0013] More specifically, a hydrogen burner forming a planar flame according to one embodiment of the present invention comprises: a burner head having a fuel supply pipe and a blower fan so as to supply fuel and air, respectively; a plurality of nozzles disposed in the burner head and spraying the fuel supplied from the fuel supply pipe to the outside through the nozzle hole, the nozzle body having a nozzle hole formed therein; a plate coupled to one surface of the burner head and having a plurality of through holes into which the plurality of nozzles are each inserted; and an ignition rod disposed adjacent to at least one of the plurality of nozzles to ignite the flame, wherein the plate is configured to spray the air supplied by the blower fan to the outside through the area between the nozzle body and the through hole so as to form the flame by a mixed fluid of the fuel and the air, and wherein the plurality of nozzles inserted into the plurality of through holes are arranged on a planar surface to form the flame having a shape corresponding to the planar surface in front of the planar surface.

[0014] According to one example related to the present invention, at least one of the plurality of nozzles in which the flame is ignited may be configured to spread the flame to at least another of the plurality of nozzles adjacent thereto, thereby forming the flame having a shape corresponding to the plane in front of the plane.

[0015] According to one example related to the present invention, the plurality of nozzles each inserted into the plurality of through holes may be arranged in a grid pattern on the plane of the plate.

[0016] According to one example related to the present invention, the plurality of nozzles each inserted into the plurality of through holes are arranged along a first line and a second line that intersect on the plane of the plate, and the nozzles arranged on the first line and the nozzles arranged on the second line may be arranged so that their centers are offset from each other.

[0017] According to one example related to the present invention, a nozzle flow path is formed inside the nozzle body in a direction perpendicular to the plane of the plate, and the nozzle holes may be formed in multiple numbers by branching out from the nozzle flow path.

[0018] According to one example related to the present invention, the nozzle body is formed in a cylindrical shape having an outer surface, and the opening of the nozzle hole may be arranged along the outer surface of the nozzle body.

[0019] According to one example related to the present invention, the nozzle further includes a swirler formed to surround the outer surface of the nozzle body so as to be interposed between the nozzle body and the through hole when the nozzle is inserted into the through hole, and the swirler may be equipped with an impeller to form a vortex in the air passing through the area between the impellers.

[0020] According to one example related to the present invention, an auxiliary nozzle hole may be formed inside the nozzle body, extending from the nozzle flow path and forming an opening at the upper end of the nozzle body.

[0021] According to one example related to the present invention, an auxiliary air injection hole may be further included, which is formed by penetrating one surface of the plate and arranged to surround the outer circumference of the penetrating hole.

[0022] According to one example related to the present invention, the nozzle body is formed as a polyhedron having a plurality of sides, and the opening of the nozzle hole may be formed to be arranged on each of the plurality of sides.

[0023] According to one example related to the present invention, the nozzle further includes a bluff body configured to surround a plurality of sides of the nozzle body so as to be interposed between the nozzle body and the through hole when the nozzle is inserted into the through hole, and the air supplied by the blower fan can be sprayed to the outside through the space between the through hole and the bluff body.

[0024] To achieve the objective of the present invention, a structure of a hydrogen burner that uniformly supplies fuel and air is presented to more easily form a planar flame according to another embodiment of the present invention.

[0025] More specifically, a hydrogen burner forming a planar flame according to another embodiment of the present invention comprises: a burner head having a fuel supply pipe and a blower fan so as to supply fuel and air, respectively; a plurality of nozzles having a nozzle body in which a nozzle hole is formed, disposed in the burner head to spray the fuel supplied from the fuel supply pipe to the outside through the nozzle hole; a plate coupled to one surface of the burner head and having a plurality of through holes into which the plurality of nozzles are each introduced, configured to spray the air supplied by the blower fan through the area between the nozzle body and the through holes; and a fuel supply manifold disposed between the fuel supply pipe and the plate and having a plurality of chambers each connected to the plurality of nozzles to uniformly distribute the fuel supplied from the fuel supply pipe to each of the plurality of nozzles.

[0026] According to one example related to the present invention, the air distribution area may further be included, which forms an area between the interior of the burner head and the fuel supply manifold and is configured to uniformly distribute the air supplied from the blower fan to each of the plurality of through holes.

[0027] According to one example related to the present invention, the fuel supply manifold comprises: a fuel inlet portion communicating with the fuel supply pipe; and a plurality of fuel transfer units provided between the fuel inlet portion and the plurality of chambers to supply the fuel within the fuel inlet portion to each of the plurality of chambers, and the fuel supply manifold may be detachably formed from the burner head.

[0028] According to one example related to the present invention, the fuel inlet, the plurality of fuel transfer units, the plurality of chambers, and the plurality of nozzles may be formed to be separable from one another.

[0029] In addition, to achieve the objective of the present invention, a control method capable of preventing flashback of a hydrogen burner according to another embodiment of the present invention is presented.

[0030] More specifically, the method comprises: a step of controlling the operation of a purge gas valve so as to open the purge gas valve of a purge gas supply pipe connected to a fuel supply pipe to supply purge gas into the burner head; a step of controlling the operation of an air valve installed in a blower fan so as to supply air of a preset flow rate and velocity into the burner head through the blower fan; a step of controlling the operation of an ignition rod so as to ignite a flame in at least one of a plurality of nozzles connected to the fuel supply pipe; a step of controlling the operation of a fuel valve installed in the fuel supply pipe so as to supply fuel of a preset flow rate and velocity into the burner head through the fuel supply pipe; and a step of controlling the fuel valve so as to shut off the fuel valve when the flame is not detected, based on the detection result of a flame detection sensor installed in the burner head.

[0031] A plate having a plurality of through holes into which the plurality of nozzles are each inserted is coupled to one side of the burner head, and the plate is characterized by forming a planar flame in which the plurality of nozzles inserted into the plurality of through holes are arranged on a plane and a flame having a shape corresponding to the plane is formed in front of the plane.

[0032] According to one example related to the present invention, the hydrogen burner forming the planar flame further comprises a flashback arrestor configured to detect a flashback within the burner head, wherein the flashback arrestor comprises a flashback-heat detection sensor configured to detect the temperature of the burner head and an internal flame detection sensor configured to detect the presence of a flame within the burner head based on the detection result of the flashback-heat detection sensor, and may further include the step of controlling the fuel valve to cut off the supply of fuel and controlling the purge gas valve to supply the purge gas within the burner head when the flashback arrestor detects a flashback within the burner head.

[0033] The effects of the present invention obtained through the above-described solution are as follows.

[0034] First, the present invention can expandably configure a wide, planar flame on the plane of a plate, thereby enabling the transfer of uniform and high-efficiency thermal energy to a heated object such as a heat exchanger.

[0035] Second, the present invention can minimize the generation of nitrogen oxides (NOx) and carbon monoxide (CO) by forming multiple short flames through multiple nozzles and appropriately mixing air and fuel.

[0036] Third, even when using hydrogen, which has a fast flame propagation speed, as fuel, the present invention can improve flame stability by injecting air and fuel separately to prevent flickering of the burning flame.

[0037] Fourth, since the present invention mixes fuel and air immediately before combustion, the occurrence of flashback caused by the mixed fluid of fuel and air can be prevented.

[0038] Fifth, the uniformity of the flame, flame stability, and flashback prevention effects can be maximized through the configuration of the fuel supply manifold and the air distribution area.

[0039] Sixth, the present invention can prevent flashback by controlling the supply flow rate and velocity of air and fuel.

[0040] Figure 1 is a conceptual diagram of a hydrogen burner that forms a flat flame.

[0041] Figure 2 is a conceptual diagram of the burner head shown in Figure 1.

[0042] Figure 3 is an example of a modified array structure of multiple nozzles.

[0043] Figure 4 is a cross-sectional view of a burner head equipped with the nozzle shown in Figure 2.

[0044] Figure 5 is an example of a nozzle deformation.

[0045] Figure 6 is a cross-sectional view of a burner head equipped with the nozzle shown in Figure 5.

[0046] Figure 7 is a conceptual diagram showing the flow of air and fuel inside the burner head in the AA' cross-section of Figure 2.

[0047] Figure 8 is a detailed view of area C shown in Figure 7.

[0048] Figure 9 is a conceptual diagram showing the separation structure of the burner head and the fuel supply manifold in the BB' cross-section of Figure 2.

[0049] Figure 10 is a diagram showing a control method for a hydrogen burner that forms a flat flame.

[0050] Hereinafter, a hydrogen burner that forms a flat flame and a method for controlling the same will be described in more detail with reference to the drawings.

[0051] In describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description is omitted.

[0052] The attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that all modifications, equivalents, and substitutions included within the concept and technical scope of the present invention are included.

[0053] In this specification, the same reference numerals are assigned to identical components even in different embodiments, and redundant descriptions thereof are omitted.

[0054] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0055] In this application, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0056] FIG. 1 is a conceptual diagram of a hydrogen burner forming a flat flame. FIG. 2 is a conceptual diagram of the burner head shown in FIG. 1. FIG. 3 is a modified example of an arrangement structure of multiple nozzles. FIG. 4 is a cross-sectional view of a burner head equipped with the nozzle shown in FIG. 2. FIG. 5 is a modified example of a nozzle. FIG. 6 is a cross-sectional view of a burner head equipped with the nozzle shown in FIG. 5.

[0057] Referring to FIGS. 1 to 6 below, the hydrogen burner (100) may be a type of burner that forms a flame using a mixed fluid of fuel and air to provide thermal energy to a heat-to-heat object, such as a heat exchanger, applied to equipment such as a boiler / furnace / drying device. At this time, the air and fuel may not be mixed in advance inside the hydrogen burner (100), but may be mixed separately by being injected from the outside.

[0058] As an example related to this, the fuel may be hydrogen gas or a mixed gas of hydrogen (H) and carbon (C). Since hydrogen typically has a flame propagation speed of 2.37 m / s in an environment of 1 atmosphere and 20°C, using hydrogen gas as fuel can form a flame very quickly in the hydrogen burner (100).

[0059] A hydrogen burner (100) includes a burner head (110), a plurality of nozzles (100a), a plate (110a), and an ignition rod (R) to form a flat flame.

[0060] More specifically, the burner head (110) is equipped with a fuel supply pipe (130) and a blower fan (120) so that fuel and air are supplied respectively.

[0061] As an example related to this, the fuel supply pipe (130) may be formed in the shape of a pipe and connected to a fuel supply unit (G1), which is a device configured to supply fuel.

[0062] More specifically, the fuel supply unit (G1) may be equipped with a pump that provides a spraying force so that fuel can flow within the burner head (110) and be sprayed to the outside of the burner head (110).

[0063] As another example related to this, a purge gas supply pipe (140) is connected to the fuel supply pipe (130), and the purge gas supply pipe (140) may be connected to a purge gas supply unit (G2) configured to supply purge gas.

[0064] More specifically, before supplying fuel into the burner head (110), the purge gas from the purge gas supply unit (G2) may be configured to sequentially pass through the purge gas supply pipe (140) and the fuel supply pipe (130) to be introduced into the burner head (110). To this end, the purge gas supply unit (G2) may be equipped with a pump that provides a spraying force so that the purge gas can discharge residual gas and contaminants into the interior of the burner head (110).

[0065] The blower fan (120) may be provided with a blower passage (120a) configured to transport air introduced from the outside of the burner head (110) into the burner head (110). The blower passage (120a) may be provided in a bent shape and may be provided on the rear of the burner head (110) so that the inside of the blower passage (120a) and the inside of the burner head (110) are in communication.

[0066] As an example related to this, the blower fan (120) may be composed of a centrifugal blower, an axial blower, etc.

[0067] A plurality of nozzles (100a) are provided with a nozzle body (100a1) in which a nozzle hole (100a3) is formed, and are positioned in a burner head (110) to inject fuel supplied from a fuel supply pipe (130) to the outside through the nozzle hole (100a3).

[0068] More specifically, when a plurality of nozzles (100a) are arranged in the burner head (110), the interior of the nozzle body (100a1) is connected to the interior of the burner head (110), so that fuel supplied into the burner head (110) by the fuel supply pipe (130) can flow into the interior of the nozzle body (100a1). Then, the transported fuel can be sprayed outward through the nozzle hole (100a3) formed in the nozzle body (100a1).

[0069] The plate (110a) is formed to be coupled to one side (111) of the burner head (110). And, so that a plurality of nozzles (100a) are arranged on a plane, it is provided with a plurality of through holes (110a1) into which the upper portions of a plurality of nozzles (100a) are each inserted. At this time, the openings of the plurality of through holes (110a1) can be arranged on the plate (110a).

[0070] More specifically, a coupling hole (110b) penetrating the exterior and interior of the burner head (110) may be formed on one side (111) of the burner head (110). In addition, the coupling hole (110b) may be formed with a shape and size corresponding to that of the plate (110a) so that the plate (110a) can be inserted.

[0071] As an example related to this, when the plate (110a) is inserted into the coupling hole (110b) and coupled, one side of the plate (110a) and one side (111) of the burner head (110) can form the same plane.

[0072] An ignition rod (R) is positioned adjacent to at least one of the plurality of nozzles (100a) to ignite a flame.

[0073] As an example related to this, the ignition rod (R) may be configured to generate high-voltage discharge energy by means of an electrical medium to ignite a flame in at least one of the plurality of nozzles (100a).

[0074] As another example related to this, the ignition rod (R) may be configured to form a spark by an electrical medium to ignite a flame in at least one of the plurality of nozzles (100a).

[0075] As another example related to this, the ignition rod (R) is configured to spray a flame forward, thereby igniting a flame in at least one of the multiple nozzles (100a).

[0076] The plate (110a) is configured to spray air supplied by the blower fan (120) through the area between the nozzle body (100a1) and the through hole (110a1). The sprayed air can be mixed with fuel sprayed outward through the nozzle hole (100a3) to form a mixed fluid.

[0077] As an example related to this, the fuel and air can be mixed immediately before combustion. Consequently, since the fuel and air meet and mix in a brief moment, the occurrence of flashback caused by the imbalance between the fuel ejection velocity and the combustion velocity can be prevented. In other words, it forms a mixing structure suitable for using fuels with fast flame propagation speeds, such as hydrogen.

[0078] Meanwhile, a mixture of air and fuel may be formed in a position adjacent to the nozzle holes (100a3) of a plurality of nozzles (100a) arranged on the plane of the plate (110a) by being introduced into each of the plurality of through holes (110a1). At this time, an ignition rod (R) positioned adjacent to at least one of the plurality of nozzles (100a) may ignite a flame in the mixture, thereby forming a flame extending from the opening of the nozzle hole (100a3).

[0079] As an example related to this, at least one of the plurality of nozzles (100a) in which a flame is ignited may propagate the flame to at least another of the adjacent plurality of nozzles (100a) to spread the flame to the front of the plane.

[0080] More specifically, a flame ignited in one nozzle (100a) can be propagated through a mixed fluid to the nozzle hole (100a3) of another nozzle (100a) adjacent thereto. As a result, the flame spreads to the nozzle holes (100a3) of a plurality of nozzles (100a), so that a plurality of nozzles (100a) arranged on the plane of the plate (110a) can form a planar flame with a shape corresponding to the plane in front of the plane.

[0081] Therefore, since a wide planar flame can be expanded on the plane of the plate (110a), uniform and high-efficiency thermal energy can be transferred to a heated object such as a heat exchanger.

[0082] As an example related to this, a plurality of nozzles (100a) each inserted into a plurality of through holes (110a1) can be arranged in a grid pattern on the plane of the plate (110a). Thus, the flame can be configured to spread along the grid arrangement in front of the plane.

[0083] As another example related to this, a plurality of nozzles (100a) each inserted into a plurality of through holes (110a1) may be arranged alternately along a first line (L1) and a second line (L2) formed intersectingly on the plane of the plate (110a).

[0084] More specifically, the center of the nozzle (100a) of the first line (L1) and the center of the nozzle (100a) of the second line (L2) can be arranged to be staggered from each other on the plane of the plate (110a) at an acute angle between 45 and 60 degrees. Thus, the flame can be configured to spread in front of the plane along the arrangement of multiple nozzles (100a) arranged to be staggered from each other.

[0085] Inside the nozzle body (100a1), a nozzle flow path (100a2) is formed in a direction perpendicular to the plane of the plate (110a), and nozzle holes (100a3) can be formed in multiple ways by branching out from the nozzle flow path (100a2).

[0086] More specifically, when the nozzle (100a) is inserted into the through hole (110a1), the nozzle passage (100a2) formed inside the nozzle body (100a1) can be connected to the inside of the burner head (110). Accordingly, fuel supplied to the inside of the burner head (110) from the fuel supply pipe (130) can flow into the nozzle passage (100a2) and be sprayed outward through each of the nozzle holes (100a3) branching out from the nozzle passage (100a2).

[0087] As an example related to this, the nozzle hole (100a3) may be formed at a different angle from the nozzle path (100a2). For example, the angle at which the nozzle path (100a2) is formed may be a preset angle for controlling the injection angle of fuel injected through the nozzle hole (100a3) to adjust the mixing ratio of air and fuel.

[0088] As an example related thereto, the nozzle body (100a1) may be formed in a cylindrical shape having an outer surface. In this case, the opening of the nozzle hole (100a3) may be formed by being arranged along the outer surface of the cylindrical nozzle body (100a1).

[0089] As another example related thereto, the nozzle body (100a1') may be formed as a polyhedron having multiple sides. For example, each of the multiple sides may be formed in the shape of a square or more polygons. In this case, the openings of the multiple nozzle holes (100a3') may be formed by being arranged on each of the multiple sides provided by the nozzle body (100a1'). Accordingly, a flame may be ignited in the openings of the multiple nozzle holes (100a3') arranged on the outer surface of the nozzle body (100a1') by an ignition rod (R).

[0090] Accordingly, a flame can be ignited in the opening of a plurality of nozzle holes (100a3, 100a3') arranged in the nozzle body (100a1, 100a1') by an ignition rod (R).

[0091] Due to the structure of the nozzle (100a, 100a') described above, short flames are formed at the openings of each nozzle hole (100a3, 100a3'), and when the flame spreads on the plane of the plate (110a, 110a'), the average temperature of the overall flame (planar flame) is lowered, so the generation of nitrogen oxides (NOx) can be minimized.

[0092] In addition, even if hydrogen, which has a fast flame propagation speed, is used as fuel, the fuel is injected through the nozzle (100a, 100a') and the air is injected into the area between the nozzle body (100a1, 100a1') and the through hole (110a1, 110a1'), so when the flame is ignited in the nozzle (100a, 100a'), the flame flickering is prevented and the flame can burn stably.

[0093] Meanwhile, as described above, when the nozzle body (100a1) is formed in a cylindrical shape, the nozzle (100a) may further include a swirler (100a5) that extends from the nozzle body (100a1) and surrounds the outer surface of the nozzle body (100a1) so as to be interposed between the nozzle body (100a1) and the through hole (110a1) when the nozzle (100a) is inserted into the through hole (110a1).

[0094] As an example related to this, the swirler (100a5) may be equipped with an impeller (100a51). In this case, air can be blown outward by passing through the impeller (100a51) through the swirler (100a5) provided in the area between the through hole (110a1) and the nozzle body (100a1), thereby forming a vortex. Additionally, a boundary layer can be formed on the plane of the plate (110a) by the airflow of the air with the formed vortex.

[0095] More specifically, the air with formed vortexes is branched out on the plate (110a) by centrifugal force to form an inner shear layer (ISL) and an outer shear layer (OSL). In the inner shear layer (ISL), the air with formed vortexes surrounds the fuel injected from the nozzle hole (100a3), thereby forming a mixed fluid with a starting point adjacent to the opening of the nozzle hole (100a3). At this time, a flame can be ignited in the nozzle hole (100a3) along the inner shear layer (ISL) by the mixed fluid, so that the flame can be stably combusted.

[0096] As an example related to this, an inner recirculation zone (IRZ) may be formed within the inner boundary layer (ISL) and an external recirculation zone (ERZ) may be formed within the outer boundary layer (OSL) by the injection force of fuel and air.

[0097] More specifically, within the internal recirculation zone (IRZ), unburned fuel can be configured to flow in an internal recirculation direction opposite to the injection direction of the fuel injected from the nozzle hole (100a3). As a result, the flame can be set into the opening of the nozzle hole (100a3) so that the flame can burn stably.

[0098] In addition, in the case of hydrogen gas, if air is supplied excessively or high-load operation is performed, the starting point of the flame may not settle at the opening of the nozzle hole (100a3) due to the high flow velocity, but may instead be separated from the opening of the nozzle hole (100a3). This phenomenon can reduce the stability of the flame and combustion efficiency. On the other hand, if the airflow of the injected air forms an internal recirculation zone (IRZ), the unburned fuel causes a recirculation flow within the internal recirculation zone (IRZ), allowing the flame to settle stably at the opening of the nozzle hole (100a3).

[0099] As an example related to this, within the external recirculation zone (ERZ), the injected air is configured to have an external recirculation flow with a velocity direction opposite to the direction of the air injection passing through the swirler (100a5), thereby enabling flame stabilization.

[0100] Meanwhile, an auxiliary nozzle hole (100a4) may be formed inside the nozzle body (100a1), extending from the nozzle flow path (100a2) and forming an opening at the upper part of the nozzle body (100a1).

[0101] More specifically, the auxiliary nozzle hole (100a4) is formed at the same angle as the nozzle passage (100a2) and can communicate with the nozzle passage (100a2) and the nozzle hole (100a3). Accordingly, a portion of the fuel introduced into the nozzle passage (100a2) can be injected outward through each of the nozzle holes (100a3), and the remaining portion of the fuel can be injected into the upper part of the nozzle body (100a1) through the auxiliary nozzle hole (100a4).

[0102] Meanwhile, since the auxiliary nozzle hole (100a4) is spaced further from the swirler (100a5) than the nozzle hole (100a3), the flame may be ignited later than in the nozzle hole (100a3). At this time, the flame ignited in the auxiliary nozzle hole (100a4) is formed with a lower temperature than the flame ignited in the nozzle hole (100a3) and has a longer length, thereby allowing the flame in the adjacent nozzle hole (100a3) to burn stably and suppressing the generation of nitrogen oxides during the combustion of the flame.

[0103] As an example related to this, the area of ​​the auxiliary nozzle hole (100a4) can be designed to be in the range of 10% to 50% of the sum of the areas of the nozzle hole (100a3) and the auxiliary nozzle hole (100a4).

[0104] As another example related to this, the flow rate of fuel injected through the auxiliary nozzle hole (100a4) can be designed to be in the range of 10% to 50% of the total flow rate of fuel injected through the nozzle (100a).

[0105] Meanwhile, an auxiliary air injection hole (110a2) may be formed in the plate (110a), which penetrates one side of the plate (110a) and is arranged to surround the outer circumference of the through hole (110a1).

[0106] More specifically, the auxiliary air injection holes (110a2) may be formed in the shape of multiple slits to surround the outer circumference of the through hole (110a1) in an area adjacent to the through hole (110a1). Additionally, air supplied into the burner head (110) from the blower fan (120) may be distributed to each of the multiple through holes (110a1) and the auxiliary air injection holes (110a2) and sprayed outward.

[0107] At this time, the ratio of the amount of air sprayed to the outside through the area between the nozzle body (100a1) and the through hole (110a1) can be controlled by the air sprayed from the auxiliary air injection hole (110a2). Accordingly, the air sprayed from the auxiliary air injection hole (110a2) can be configured to control the length and temperature of the flame ignited in the nozzle (100a), thereby suppressing the generation of nitrogen oxides and controlling the amount of heat transfer of the flame.

[0108] As an example related to this, the flow rate of air injected through the auxiliary air injection port (110a2) can be designed to be in the range of 10% to 50% of the total amount of air injected outside the burner head (110).

[0109] Meanwhile, as described above, the nozzle body (100a1') may be formed in the shape of a polyhedron. In this case, the nozzle (100a') may further include a bluff body (100a4') that is interposed between the nozzle body (100a1') and the through hole (110a1') when the nozzle (100a') is inserted into the through hole (110a1') so as to surround a plurality of sides of the nozzle body (100a1').

[0110] More specifically, air supplied by the blower fan (120) to the interior of the burner head (110) can be injected outward through the space between the through hole (110a1) and the bluff body (100a4'). As a result, a flame ignited at the opening of the nozzle hole (100a3) can be formed on the bluff body (100a4').

[0111] As an example related to this, the air injected externally forms an inner boundary layer (ISL') and an outer boundary layer (OSL'), an internal recirculation zone (IRZ') is formed within the inner boundary layer (ISL'), and an external recirculation zone (ERZ') may be formed within the outer boundary layer (OSL'); however, since this is identical to what was previously described, further explanation is omitted.

[0112] Due to the structure of the nozzle (100a, 100a') and plate (110a, 110a') described above, even when using a fuel mixed with hydrogen and carbon to form a flat flame, the mixing of air and fuel is properly achieved, so the generation of carbon monoxide (CO) due to the limitation of uniform mixing of fuel and air can be minimized.

[0113] FIG. 7 is a conceptual diagram showing the flow of air and fuel inside the burner head in the A-A' section of FIG. 2. FIG. 8 is a detailed view of area C indicated in FIG. 7. FIG. 9 is a conceptual diagram showing the separation structure of the burner head and the fuel supply manifold in the B-B' section of FIG. 2.

[0114] Meanwhile, the nozzle (100a) shown in FIGS. 7 to 9 does not have a nozzle hole (100a3) and an auxiliary nozzle hole (100a4) shown, but it should be understood that this is omitted to facilitate the explanation of the flow structure of air and fuel.

[0115] Furthermore, in FIGS. 7 to 9, the nozzle body (100a1) is shown in a cylindrical shape, but this is merely an example, and as described above, it may be formed to have a polyhedral shape (see FIG. 5).

[0116] Referring to FIGS. 7 to 9, the hydrogen burner (100) further includes a fuel supply manifold (150) to facilitate the formation of a flat flame. The fuel supply manifold (150) is positioned between a fuel supply pipe (130) and a plate (110a) and is configured to have a plurality of chambers (153) each connected to a plurality of nozzles (100a) to uniformly distribute fuel supplied from the fuel supply pipe (130) to each of the plurality of nozzles (100a).

[0117] Additionally, an air distribution area (160) may be formed in the area between the interior of the burner head (110) and the fuel supply manifold (150) to uniformly distribute air supplied from the blower fan (120) to each of the multiple through holes (110a1).

[0118] More specifically, air supplied from the blower fan (120) can be supplied to each of the plurality of through holes (110a1) through an air distribution area (160) which is an area between the inside of the burner head (110) and the fuel supply manifold (150).

[0119] At this time, since the plurality of chambers (153) are positioned very close to the plate (110a), the area where air flows between the plate (110a) and the plurality of chambers (153) is limited, so that the pressure of the air directed toward the through hole (110a1) in the air distribution area (160) is equalized, and thus the flow rate and velocity of the air can be supplied uniformly to each of the plurality of through holes (110a1).

[0120] The fuel supply manifold (150) may include a fuel inlet section (151) connected to a fuel supply pipe (130) and a plurality of fuel transfer units (152) connected to the fuel inlet section (151).

[0121] More specifically, a plurality of fuel transfer units (152) may be provided between a fuel inlet section (151) and a plurality of chambers (153) to supply fuel from the fuel inlet section (151) to each of the plurality of chambers (153).

[0122] That is, the connection structure of the fuel inlet section (151), the plurality of fuel transfer units (152), and the plurality of chambers (153) can form a primary manifold that primarily distributes fuel inside the burner head (110).

[0123] As an example related thereto, a first receiving section (151a) is formed inside the fuel inlet section (151) to receive fuel supplied from the fuel supply pipe (130), and a fuel transfer path (152a) can be formed inside the fuel transfer unit (152) so as to supply the fuel in the first receiving section (151a) to each of the plurality of chambers (153). That is, the fuel inside the first receiving section (151a) can be made to flow into the fuel transfer path (152a).

[0124] Additionally, between the fuel inlet section (151) and the chamber (153), the sides of the plurality of fuel transfer units (152) are each mounted on the sides of the plurality of chambers (153), and when mounted, the fuel transfer passage (152a) can be connected to a second receiving section (153a) formed inside the chamber (153).

[0125] More specifically, fuel within the first receiving section (151a) may be introduced into the fuel transfer channel (152a), and the introduced fuel may be configured to flow into the second receiving section (153a) connected to the fuel transfer channel (152a). To this end, a connecting hole (153b) forming an opening of the second receiving section (153a) may be formed on the side of a plurality of chambers (153).

[0126] A plurality of nozzles (100a) are formed to be inserted into each through hole (110a1) of the plate (110a) and can be mounted in each of the plurality of chambers (153).

[0127] With this configuration, fuel supplied from the fuel supply pipe (130) passes sequentially through the fuel inlet section (151), a plurality of fuel transfer units (152), and a plurality of chambers (153) and is supplied to each of the plurality of nozzles (100a), and the supplied fuel is introduced into the nozzle passage (100a2) of each of the plurality of nozzles (100a) and sprayed outward through the nozzle hole (100a3).

[0128] That is, the connection structure of the plurality of chambers (153) and the plurality of nozzles (100a) can form a secondary manifold that secondarily distributes fuel inside the burner head (110) before the fuel is injected to the outside.

[0129] Meanwhile, in order to uniformly supply fuel to each nozzle (100a) through the fuel supply manifold (150), a part of the nozzle (100a, 100a') may be formed to protrude into the second receiving portion (153a, 153a') of the chamber (153, 153'), and a part of the fuel transfer unit (152) may be formed to protrude into the first receiving portion (151a) of the fuel inlet portion (151).

[0130] As an example related to this, a portion of the nozzle (100a, 100a') may be mounted in the chamber (153, 153') and formed to protrude into the second receiving portion (153a, 153a') of the chamber (153, 153'). As a result, fuel may flow from the second receiving portion (153a, 153a') through the space (153a1, 153a1') between the nozzle (100a, 100a') and the inner wall of the chamber (153, 153') into the opening of the nozzle flow path (100a2, 100a2').

[0131] For example, when the nozzle body (100a1) is formed in a cylindrical shape, and a part of the nozzle (100a) protruding into the chamber (153) is defined as the nozzle protrusion (100a11), the distance between the end of the nozzle protrusion (100a11) and the lower side wall of the second receiving portion (153a) of the chamber (153) is H' 153a And, the end diameter of the nozzle (100a) protruding into the chamber (153) is D 100a1 and the diameter of the nozzle channel (100a2) formed therein is D 100a2 When, the area of ​​the space between (153a1) is A 153a1 = (D 100a1 2 )H' 153a And, the inlet area of ​​the nozzle path (100a2) is A 100a2 = D 100a2 2 is, and A 100a2 See A 153a1 It can be set to be large. (See Fig. 4)

[0132] In this case, the lower side wall may be defined as the inner wall of the chamber (153) facing the end of the nozzle protrusion (100a11).

[0133] Through this, the fuel gradually increases in flow velocity as it passes through the space (153a1) between the nozzle (100a) and the inner wall of the chamber (153) in the second receiving section (153a), and then through the nozzle path (100a2). A 153a1 ul A 100a2 As explained more broadly, a gradual increase in flow rate is implemented, thereby inducing the fuel to be distributed more uniformly to each of the multiple nozzles (100a).

[0134] In addition, in this example, the internal height H of the second receiving portion (153a) in the direction of the protrusion of the nozzle protrusion (100a11) 153a Regarding this, the distance H' between the end of the nozzle protrusion (100a11) and the lower side wall of the second receiving portion (153a) 153a By adjusting it, a more uniform flow can be achieved. In this case, the nozzle protrusion (100a11) is in the second receiving portion (153a), at the internal height H of the second receiving portion (153a). 153a Distance H' between 153a Length excluding (H 153a - H' 153a It can be defined as protruding by ) amount.

[0135] In this example, the internal height H of the second receiving section (153a) 153a The distance between and H' 153a The ratio of is, 0<(H' 153a / H 153a )≤1 can be true. Specifically, 0<(H' 153a / H 153a The effect of fuel flow homogenization may be higher in the range of )≤0.6.

[0136] As another example related to this, when the nozzle body (100a1') is formed as a polyhedron (e.g., a rectangular prism), and a part of the nozzle (100a') protruding into the interior of the chamber (153') is defined as a nozzle protrusion (100a11'), the distance between the end of the nozzle protrusion (100a11') and the lower side wall of the second receiving portion (153a') of the chamber (153') is H' 153a' and the end length of the nozzle body (100a1') is L 100a1' and the end width perpendicular to this is L' 100a1' and, the end length of the nozzle path (100a2') formed therein is L 100a2' and the end width perpendicular to this is L' 100a2' When, the area of ​​the space (153a1') between the nozzle (100a') and the inner wall of the chamber (153') is A 153a1' =2(L 100a1' H' 153a' )+2(L' 100a1' H' 153a' ) and the inlet area of ​​the nozzle path (100a2) is A 100a2' =L 100a2' L' 100a2' is, and A 100a2' See A 153a1' It can be set to be large. (See Fig. 6)

[0137] Through this, the fuel gradually increases in flow velocity as it passes through the space (153a1') between the nozzle (100a') and the inner wall of the chamber (153') in the second receiving section (153a'), and then through the nozzle path (100a2'). A 153a1' ul A 100a2' As explained more broadly, a gradual increase in flow velocity is implemented, thereby inducing the fuel to be distributed more uniformly to each of the multiple nozzles (100a').

[0138] In addition, in this example, the internal height H of the second receiving portion (153a') in the direction of the protrusion of the nozzle protrusion (100a11') 153a'Regarding this, the distance H' between the end of the nozzle protrusion (100a11') and the lower side wall of the second receiving portion (153a') 153a' By adjusting it, a more uniform flow can be achieved. In this case, the nozzle protrusion (100a11') is at the internal height H of the second receiving portion (153a') in the second receiving portion (153a'). 153a' Distance H' between 153a' Length excluding (H 153a' -H' 153a' It can be defined as protruding by ) amount.

[0139] In this example, the internal height H of the second receiving section (153a') 153a' The distance between and H' 153a' The ratio of is, 0<(H' 153a' / H 153a' )≤1 can be true. Specifically, 0<(H' 153a' / H 153a' The effect of fuel flow homogenization may be higher in the range of )≤0.6.

[0140] According to the examples described above, fuel supplied from the fuel supply pipe (130) can flow into the opening of the nozzle (100a, 100a') by passing through the space (153a1, 153a1') between the inner wall of the nozzle (100a, 100a') and the chamber (153, 153'). Additionally, at least a portion of the nozzle (100a, 100a') can protrude into the interior of the chamber (153, 153') to form a nozzle protrusion (100a11, 100a11') so that the fuel supplied to the chamber (153, 153') is evenly distributed among the plurality of nozzles (100a, 100a'). In addition, the end of the nozzle (100a, 100a') having an opening formed by the nozzle protrusion (100a11, 100a11') is positioned to face the inner wall of the chamber (153, 153') and protrudes into the interior of the chamber (153, 153') by a preset height, so that the flow area is gradually reduced, and thus the uniformity of fuel supply can be further improved.

[0141] Additionally, a part of the fuel transfer unit (152) may be mounted on the fuel inlet (151) and formed to protrude into the first receiving portion (151a) of the fuel inlet (151). As a result, fuel flows from the first receiving portion (151a) through the space (151a1) between the fuel transfer unit (152) and the inner wall of the fuel inlet (151) into the opening of the fuel transfer path (152a).

[0142] For example, when the fuel inlet section (151) is formed as a rectangular parallelepiped, and a part of the fuel transfer unit (152) protruding into the fuel inlet section (151) is defined as the unit protrusion (152b), the distance H' between the end of the unit protrusion (152b) and the lower side wall of the first receiving section (151a) 151a And, the end width of the fuel transfer unit (152) protruding into the fuel inlet part (151) is L 152 and the end length is L' 152 and the end width of the fuel transfer path (152a) formed therein is L 152a and the end length is L' 152a When, the area of ​​the space (151a1) between the inner wall of the fuel transfer unit (152) and the fuel inlet part (151) is A 151a1 =2(L 152 H' 151a )+2(L' 152 H' 151a ) and the inlet area of ​​the fuel transfer path (152a) is A 152a = L 152 L' 152a is, and A 152a See A 151a1 It can be set to be large. (See Fig. 8)

[0143] Through this, the fuel gradually increases in flow velocity as it passes from the first receiving section (151a), through the space (151a1) between the fuel transfer unit (152) and the inner wall of the fuel inlet section (151), and through the fuel transfer path (152a). A 151a1 ul A 152aAs explained more broadly, a gradual increase in flow rate is implemented, thereby inducing the fuel to be distributed more uniformly to each of the multiple fuel transfer units (152).

[0144] In addition, in this example, the internal height H of the first receiving portion (151a) in the direction of the protrusion of the unit protrusion (152b) 151a Regarding this, the distance H' between the end of the unit protrusion (152b) and the lower side wall of the first receiving portion (151a) 151a By adjusting it, a more uniform flow can be achieved. In this case, the unit protrusion (152b) is in the first receiving portion (151a), at the internal height H of the first receiving portion (151a). 151a Distance H' between 151a Length excluding (H 151a - H' 151a It can be defined as protruding by ) amount.

[0145] In this example, the internal height H of the first receiving section (151a) 151a The distance between and H' 151a The ratio of is, 0<(H' 151a / H 151a )≤1 can be true. Specifically, 0<(H' 151a / H 151a The effect of fuel flow homogenization may be higher in the range of )≤0.6.

[0146] Meanwhile, in each of the plurality of chambers (153), a plurality of nozzles (100a) may be mounted and arranged along the length direction of the chamber (153).

[0147] For example, when a plurality of nozzles (100a) are arranged in a grid pattern on the plane of the plate (110a), the fuel supply manifold (150) is provided with a total of 4 chambers (153), and each chamber (153) is equipped with 4 nozzles (100a), so that a total of 16 nozzles (100a) mounted in the plurality of chambers (153) can be arranged to form 4 columns and 4 rows on the plane of the plate (110a).

[0148] To this end, it is preferable that the fuel transfer unit (152) is provided in greater numbers than the fuel inlet unit (151), and that the nozzle (100a) is provided in greater numbers than the fuel transfer unit (152).

[0149] Meanwhile, the fuel supply manifold (150) may be configured to be detachable from the burner head (110). Additionally, although not shown in the drawing, the fuel inlet (151), a plurality of fuel transfer units (152), a plurality of chambers (153), and a plurality of nozzles (100a) may also be configured to be detachable from one another.

[0150] More specifically, the plate (110a) is configured to be separable from a coupling hole (110b) formed on one side (111) of the burner head (110), and a plurality of nozzles (100a) are configured to be separable from a plurality of through holes (110a1) of the plate (110a) and separable from a plurality of chambers (153), and the fuel transfer unit (152) is configured to be separable from the fuel inlet part (151) and the plurality of chambers (153), respectively, so that each component of the fuel supply manifold (150) can be configured as a modular structure that is mutually separable.

[0151] Therefore, when transferring heat through a flame to a large-area object to be heated, it is possible to easily form a planar flame of various areas by simply increasing the number of components of the modular fuel supply manifold (150) without the need to install multiple burners.

[0152] Additionally, the fuel supply pipe (130) and the blower fan (120) may be assembled from the rear of the burner head (110). For example, the blower fan (120) may be connected to the rear of the burner head (110) by a bolt.

[0153] Accordingly, during maintenance of a hydrogen burner (100) applied to equipment such as a boiler / furnace / drying device, the fuel supply pipe (130) and the blower fan (120) can be separated from the rear of the burner head (110) respectively without the need to separate the hydrogen burner (100) from the equipment.

[0154] According to the configuration described above, the hydrogen burner (100) is configured such that a plurality of nozzles (100a) are arranged on the plane of the plate (110a), and fuel and air are injected individually, thereby improving the stability and efficiency of the flame and providing a combustion and ignition structure of the hydrogen burner (100) that forms a flat flame capable of reducing the generation of nitrogen oxides during the combustion of the flame.

[0155] In addition, by the structure of the fuel supply manifold (150) and the air distribution area (160), the flow rate and velocity of fuel and air can be supplied uniformly, thereby maximizing effects such as flame uniformity and stability, and prevention of flashback.

[0156] Figure 10 is a diagram showing a control method for a hydrogen burner that forms a flat flame.

[0157] Hereinafter, a control method for a hydrogen burner (100) that forms a flat flame will be described with reference to FIG. 10.

[0158] At this time, the hydrogen burner (100) forming a flat flame may be the hydrogen burner (100) forming a flat flame described above. Therefore, the same description will be omitted as much as possible.

[0159] Before operating the hydrogen burner (100) that forms a flat flame, a step of controlling the operation of the purge gas valve (V1) is performed so that the purge gas valve (V1) is opened and purge gas is supplied into the burner head (110).

[0160] As an example related thereto, the purge gas supply pipe (140) may be configured to supply purge gas to the inside of the burner head (110) through the fuel supply pipe (130) so as to discharge foreign matter or gas remaining inside the burner head (110) to the outside when the purge gas valve (V1) is opened. The purge gas may be an inert gas such as nitrogen (N2), argon (Ar), or helium (He).

[0161] As an example related to this, the purge gas valve (V1) may be a shut-off valve. A shut-off valve refers to a valve device that opens and closes automatically by remote control, and since this is a known technology, further explanation is omitted.

[0162] In addition, a first pressure switch (P1) may be installed between the purge gas supply unit (G2), which supplies purge gas from the outside, and the purge gas valve (V1). Accordingly, the on / off of the purge gas valve (V1) can be controlled so that the flow rate of the purge gas is regulated based on the pressure of the purge gas supplied from the purge gas supply unit (G2).

[0163] A step is performed to control the operation of an air valve (V2) installed in a blower fan (120) so that a preset flow rate of air is supplied into the burner head (110) through the blower fan (120).

[0164] More specifically, an air valve (V2) may be provided in the air passage (120a) of the blower fan (120).

[0165] As an example related to this, the air valve (V2) may be a flow control valve. Accordingly, the flow rate and flow velocity supplied can be controlled depending on the degree of opening and closing of the valve.

[0166] In addition, a second pressure switch (P2) may be provided in the air passage (120a). Accordingly, the opening and closing of the air valve (V2) may be controlled based on the air pressure within the air passage (120a) detected by the second pressure switch (P2). At this time, since the second pressure switch (P2) is a pressure switch of the same type as the first pressure switch (P1), further explanation is omitted.

[0167] A step is performed to control the operation of the ignition rod (R) so that a flame is ignited in at least one of the plurality of nozzles (100a) connected to the fuel supply pipe (130).

[0168] A step is performed to control the operation of a fuel valve (V3) installed in a fuel supply pipe (130) so that a preset amount of fuel is supplied into the burner head (110) through the fuel supply pipe (130). As an example related thereto, the fuel supply pipe (130) may be configured to supply fuel into the burner head (110) when the fuel valve (V3) is opened.

[0169] At this time, the activated ignition rod (R) can be configured to ignite a flame in at least one nozzle hole (100a3) of a plurality of nozzles (100a) by means of air supplied through the fuel supply pipe (130) and a mixed fluid supplied through the blower fan (120). As a result, the flame ignited in one nozzle (100a) propagates to the remaining nozzles (100a), and a flame can be formed in front of the plane of the plate (110a).

[0170] As an example related to this, the fuel valve (V3) can be made of a shut-off valve.

[0171] In addition, a third pressure switch (P3) may be installed between the fuel supply unit (G1) that supplies fuel to the fuel supply pipe (130) and the fuel valve (V3). Accordingly, the opening and closing of the fuel valve (V3) can be controlled based on the pressure of the fuel supplied within the fuel supply pipe (130). At this time, since the third pressure switch (P3) is a pressure switch of the same type as the second pressure switch (P2), further explanation is omitted.

[0172] Furthermore, a fuel flow valve (V4) may be installed between the fuel valve (V3) and the location where the fuel supply pipe (130) and the purge gas supply pipe (140) are connected. Accordingly, the flow rate and velocity supplied can be controlled according to the degree of opening and closing of the valve.

[0173] As an example related to this, the opening and closing of the fuel flow valve (V4) can be controlled based on the pressure of the fuel in the fuel supply pipe (130) detected by the third pressure switch (P3).

[0174] As another example related to this, the fuel supply unit (G1) may be provided in two. In this case, one fuel supply unit (G1a) may be configured to supply hydrogen gas, and the other fuel supply unit (G1b) may be configured to supply carbon mixed with hydrogen gas.

[0175] Meanwhile, a pressure reducing regulator (PR) may be installed between the third pressure switch (P3) and the fuel valve (V3). Accordingly, the operation of the pressure reducing regulator (PR) can be controlled to maintain the pressure after reducing the pressure of the fuel supplied from the fuel supply unit (G1) to the fuel supply pipe (130) to a preset pressure.

[0176] Meanwhile, an orifice (O) may be provided in the purge gas supply pipe (140) between the purge gas valve (V1) and the burner head (110). Accordingly, the orifice (O) may be configured to control the pressure and flow rate of the purging gas supplied from the purge gas supply unit (G2).

[0177] A flame detection sensor (S1) may be installed in the burner head (110) so as to be positioned toward the plate (110a) and configured to detect a flame formed in front of the plane of the plate (110a). The flame detection sensor (S1) is a device configured to detect light from the flame and may be any one of an ultraviolet detection device, an infrared detection device, and a photoelectric sensor.

[0178] Accordingly, based on the detection result of the flame detection sensor (S1), a step of controlling the fuel valve (V3) so that the fuel valve (V3) is blocked when no flame is detected can be performed. Thus, flashback caused by residual mixed fluid can be prevented.

[0179] Meanwhile, the hydrogen burner (100) may further include a flashback arrestor (S2). The flashback arrestor (S2) may be equipped with an internal flame detection sensor (S2a) and a flashback-heat detection sensor (S2b).

[0180] More specifically, when the backfire-heat detection sensor (S2b) measures a temperature value greater than a preset temperature inside the burner head (110), the temperature of the backfire arrestor (S2) can be measured to activate the internal flame detection sensor (S2a).

[0181] As an example related to this, when the internal flame detection sensor (S2a) detects a flashback flame inside the burner head (110), the method may further include the step of controlling the fuel valve (V3) to block the supply of fuel flowing into the burner head (110), and then controlling the purge gas valve (V1) to supply purge gas into the burner head (110).

[0182] As an example related thereto, the internal flame detection sensor (S2a) may be any one of an ultraviolet detection device, an infrared detection device, and a photoelectric sensor, and the backfire-heat detection sensor (S2b) may be a temperature sensor such as a thermocouple, a resistance temperature sensor, or a thermistor.

[0183] Meanwhile, a flashback detection sensor (S3) may be provided in the area adjacent to the part of the burner head (110) where the blower fan (120) is mounted. This sensor is configured to detect the internal temperature of the area between the burner head (110) and the blower path (120a) and the flashback flame, and may have the same configuration as the flashback arrestor (S2) described above, but is not limited thereto.

[0184] Meanwhile, an oxygen sensor (S4) configured to measure the oxygen concentration in the exhaust gas formed from the flame may be provided on the outside of the burner head (110).

[0185] More specifically, when a hydrogen burner (100) is applied to equipment (E) such as a boiler / furnace / drying device, an oxygen measuring sensor (S4) may be provided at the exhaust port (E1) of the equipment (E) to measure the oxygen concentration in the combustion gas formed from the flame. At this time, the oxygen measuring sensor (S4) calculates the harmfulness of the combustion gas based on the measured oxygen concentration, and by controlling the degree of opening and closing of the air valve (V2) and the fuel flow valve (V4) based on this, the flow rate of air supplied from the blower fan (120) and the flow rate of fuel supplied from the fuel supply pipe (130) can be controlled.

[0186] Additionally, after the operation of the hydrogen burner (100) forming a flat flame is finished, a step of controlling the operation of the purge gas valve (V1) is performed so that the purge gas valve (V1) is opened and purge gas is supplied into the burner head (110). This is the same as the step of supplying purge gas before the operation of the hydrogen burner (100), and further explanation is omitted.

[0187] Meanwhile, the control method of the hydrogen burner (100) described above can be performed automatically by an automatic control system (not shown). More specifically, the automatic control system (not shown) can be configured to control the opening and closing of the purge gas valve (V1), air valve (V2), fuel valve (V3), and fuel flow valve (V4) based on the detection result of at least one of the first pressure switch (P1), second pressure switch (P2), third pressure switch (P3), flame detection sensor (S1), flashback arrestor (S2), flashback detection sensor (S3), and oxygen measurement sensor (S4).

[0188] According to the configuration described above, through the control method of the hydrogen burner (100), air and fuel are controlled to be supplied into the burner head (110) at a preset supply flow rate and flow rate, thereby improving flame stability and minimizing the generation of nitrogen oxides. In the event that a flame is not detected in front of the flat surface of the plate (110a) or a flame caused by flashback is detected inside the blower (120a) and fuel supply pipe (130), the supply of fuel and air is cut off and purge gas is supplied, thereby preventing the occurrence of flashback.

[0189] The foregoing description is merely illustrative, and various modifications may be made by those skilled in the art without departing from the scope and technical spirit of the described embodiments. The foregoing embodiments may be implemented individually or in any combination.

Claims

1. A burner head equipped with a fuel supply pipe and a blower fan to supply fuel and air respectively; A plurality of nozzles having a nozzle body in which a nozzle hole is formed, disposed in the burner head, and spraying the fuel supplied from the fuel supply pipe to the outside through the nozzle hole; A plate coupled to one surface of the burner head and having a plurality of through holes into which the plurality of nozzles are each inserted; and It includes an ignition rod disposed adjacent to at least one of the plurality of nozzles above to ignite a flame, and The above plate is, A hydrogen burner for forming a planar flame, characterized in that the air supplied by the blower fan is injected outward through the area between the nozzle body and the through hole so as to form the flame by the mixture of the fuel and the air, and the plurality of nozzles each introduced into the plurality of through holes are arranged on a plane to form the flame having a shape corresponding to the plane in front of the plane.

2. In Paragraph 1, A hydrogen burner forming a planar flame, characterized in that at least one of the plurality of nozzles where the flame is ignited spreads the flame to at least one other nozzle among the plurality of nozzles adjacent thereto.

3. In Paragraph 2, A hydrogen burner forming a planar flame, characterized in that the plurality of nozzles, each inserted into the plurality of through holes, are arranged in a grid pattern on the plane of the plate.

4. In Paragraph 2, A hydrogen burner forming a planar flame, characterized in that the plurality of nozzles each inserted into the plurality of through holes are arranged along a first line and a second line formed intersecting on the plane of the plate, and the nozzles arranged on the first line and the nozzles arranged on the second line are positioned such that their centers are offset from each other.

5. In Paragraph 1, Inside the nozzle body, a nozzle flow path is formed in a direction perpendicular to the plane of the plate, and A hydrogen burner forming a planar flame, characterized in that the nozzle holes are formed in multiple numbers by branching out from the nozzle flow path.

6. In Paragraph 5, A hydrogen burner forming a planar flame, characterized in that the nozzle body is formed in a cylindrical shape having an outer surface, and the opening of the nozzle hole is arranged along the outer surface of the nozzle body.

7. In Paragraph 6, The nozzle further includes a swirler formed to surround the outer surface of the nozzle body so as to be interposed between the nozzle body and the through hole when the nozzle is inserted into the through hole. The above swirler is a hydrogen burner that forms a planar flame, characterized by having an impeller to form a vortex in the air passing through the area between the impellers.

8. In Paragraph 7, A hydrogen burner that forms a flat flame, characterized in that an auxiliary nozzle hole is formed inside the nozzle body, extending from the nozzle flow path and forming an opening at the upper end of the nozzle body.

9. In Paragraph 8, A hydrogen burner forming a planar flame, further comprising an auxiliary air injection hole formed by penetrating one surface of the plate and arranged to surround the outer circumference of the penetrating hole.

10. In Paragraph 5, A hydrogen burner forming a planar flame, characterized in that the nozzle body is formed as a polyhedron having a plurality of sides, and the opening of the nozzle hole is arranged on each of the plurality of sides.

11. In Paragraph 10, The nozzle further includes a bluff body configured to surround a plurality of sides of the nozzle body so as to be interposed between the nozzle body and the through hole when the nozzle is inserted into the through hole. A hydrogen burner forming a flat flame, characterized in that the air supplied by the blower fan is sprayed outward through the space between the through hole and the bluff body.

12. A burner head equipped with a fuel supply pipe and a blower fan to supply fuel and air respectively; A plurality of nozzles having a nozzle body in which a nozzle hole is formed, disposed in the burner head, and spraying the fuel supplied from the fuel supply pipe to the outside through the nozzle hole; A plate coupled to one surface of the burner head and having a plurality of through holes into which the plurality of nozzles are each introduced, configured to spray the air supplied by the blower fan to the outside through the area between the nozzle body and the through holes; and A hydrogen burner forming a planar flame, comprising a fuel supply manifold disposed between the fuel supply pipe and the plate, and having a plurality of chambers each connected to the plurality of nozzles, for uniformly distributing the fuel supplied from the fuel supply pipe to each of the plurality of nozzles.

13. In Paragraph 12, A hydrogen burner forming a planar flame, further comprising an air distribution area formed between the interior of the burner head and the fuel supply manifold, configured to uniformly distribute the air supplied from the blower fan to each of the plurality of through holes.

14. In Paragraph 13, The above fuel supply manifold is, A fuel inlet connected to the above fuel supply pipe; and The apparatus further comprises a plurality of fuel transfer units disposed between the fuel inlet and the plurality of chambers, configured to supply the fuel within the fuel inlet to each of the plurality of chambers. A hydrogen burner forming a flat flame, characterized in that the fuel supply manifold is configured to be detachable from the burner head.

15. In Paragraph 14, A hydrogen burner forming a planar flame, characterized in that the fuel inlet, the plurality of fuel transfer units, the plurality of chambers, and the plurality of nozzles are formed to be separable from one another.

16. A step of controlling the operation of the purge gas valve so as to open the purge gas valve of the purge gas supply pipe connected to the fuel supply pipe, thereby supplying purge gas into the burner head; A step of controlling the operation of an air valve installed in a blower fan so that air of a preset flow rate and velocity is supplied into the burner head through the blower fan; A step of controlling the operation of an ignition rod so that a flame is ignited in at least one of a plurality of nozzles connected to the fuel supply pipe; A step of controlling the operation of a fuel valve installed in the fuel supply pipe so that fuel of a preset flow rate and velocity is supplied into the burner head through the fuel supply pipe; and Based on the detection result of the flame detection sensor installed in the burner head, the method includes the step of controlling the fuel valve so that the fuel valve is shut off when the flame is not detected. On one side of the burner head, a plate having a plurality of through holes into which the plurality of nozzles are each inserted is coupled, and A control method for a hydrogen burner forming a planar flame, characterized in that the above plate has a plurality of nozzles, each inserted into a plurality of through holes, arranged on a plane to form a flame with a shape corresponding to the plane in front of the plane.

17. In Paragraph 16, The hydrogen burner forming the above-mentioned flat flame further includes a flashback arrestor configured to detect flashback within the burner head, and The above flashback arrestor comprises a flashback-heat detection sensor configured to detect the temperature of the burner head and an internal flame detection sensor configured to detect the presence of the flame within the burner head based on the detection result of the flashback-heat detection sensor. A control method for a hydrogen burner forming a flat flame, further comprising the step of controlling the fuel valve to cut off the supply of fuel and controlling the purge gas valve to supply purge gas into the burner head when the flashback arrestor detects a flashback in the burner head.

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