WO2024112001A1 - Brûleur de chaudière de type à prémélange partiel capable d'empêcher le retour de flamme d'un combustible hydrogène - Google Patents

Brûleur de chaudière de type à prémélange partiel capable d'empêcher le retour de flamme d'un combustible hydrogène Download PDF

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Publication number
WO2024112001A1
WO2024112001A1 PCT/KR2023/018469 KR2023018469W WO2024112001A1 WO 2024112001 A1 WO2024112001 A1 WO 2024112001A1 KR 2023018469 W KR2023018469 W KR 2023018469W WO 2024112001 A1 WO2024112001 A1 WO 2024112001A1
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Prior art keywords
fuel
fuel nozzle
oxidizing agent
nozzle
burner
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PCT/KR2023/018469
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English (en)
Korean (ko)
Inventor
이기만
김정현
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순천대학교 산학협력단
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Publication of WO2024112001A1 publication Critical patent/WO2024112001A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes

Definitions

  • the present invention relates to a partial pre-mixing type burner for a boiler that can prevent hydrogen fuel backfire, and more specifically, to burn by mixing hydrogen, a carbon-free fuel, in an existing low-pressure boiler burner exclusively for LNG and city gas, resulting in rapid combustion of hydrogen.
  • This relates to a partial premixed burner that forms a split flame by configuring multiple fuel nozzles in consideration of speed, suppresses the production of nitrogen oxides, etc., and prevents backfire.
  • the combustion device of a boiler is structured to obtain a heat source by injecting fuel supplied from a fuel tank into a nozzle of a burner and burning it inside the combustion chamber.
  • the combustion device of these boilers injects fuel such as diesel, kerosene, LNG, LPG, shale gas, and bunker oil through a nozzle and supplies it directly to the burner for combustion. Therefore, not only is the thermal power structurally limited, but relative heating power is required to increase the thermal power. As a result, a large amount of fuel energy had to be supplied, resulting in high costs.
  • the combustion device of the boiler used to date only uses fuel such as diesel, kerosene, LNG, LPG, shale gas, and bunker oil, so there is a structural problem that the thermal efficiency of the combustion device is significantly reduced. Additionally, the thermal efficiency is low. There was an uneconomical problem of consuming a lot of fuel, and there was a problem of increasing the amount of harmful gases generated because complete combustion was not achieved structurally. To solve these problems, various technologies are being developed to increase the thermal efficiency of boilers and reduce fuel consumption.
  • a burner is provided with a vortex generator that forms a swirling flow of combustion air flow, and a mixing zone continues downstream of the vortex generator, and this mixing zone extends in the flow direction within the transition section.
  • the flow guide means functions to transport the swirling flow formed by the vortex generator into the mixing pipe acting downstream of the flow guide means, and is connected to the flow of combustion air existing within the vortex generator.
  • Means for supplying liquid or gaseous fuel, or both, are installed, and the mixture of fuel and air thus obtained is ignited and burned in a combustion chamber continuing downstream of the mixing zone, and at the same time, the reverse flow zone (RB).
  • the fuel containing hydrogen or consisting only of hydrogen is connected to a fuel tank connected to a supply line for supplying the fuel within the flow guide means, downstream of the flow guide means, or both.
  • the supply of gaseous fuel containing hydrogen or consisting only of hydrogen is supplied to the swirling flow of the fuel and air through a plurality of supply ducts from the provided fuel supply means, and is performed so that instability in the swirling flow of fuel and air is minimized.
  • Korean Patent Publication No. 10-2460672 discloses a nozzle cylinder in which a space through which hydrogen fuel flows is formed and on the surface of which a plurality of fuel holes through which fuel flows are formed; spaced apart from the nozzle cylinder and located in the longitudinal direction of the nozzle cylinder.
  • a shroud formed to surround the; It is formed between the nozzle cylinder and the shroud, and includes a mixing passage that mixes the fuel supplied through the plurality of fuel holes and the compressed air supplied from the compressor, wherein the distance between the plurality of fuel holes increases toward the combustion chamber.
  • a hydrogen fuel nozzle is disclosed that is formed to gradually become larger, and the size of the plurality of fuel holes is formed to gradually become smaller in the direction toward the combustion chamber.
  • Korean Patent Publication No. 10-2456687 discloses a nozzle for a combustor that burns fuel containing hydrogen, an outer tube through which air moves; an inner tube through which fuel moves and is installed within the outer tube; A swirler connected to the inner tube and having a plurality of injection holes for injecting fuel into the outer tube; And A micro injection member installed in front of the swirler and having a plurality of fine dispersion tubes for dispersing fuel, wherein the swirler forms a vortex to mix fuel and air, and at the rear end of the micro injection member.
  • a nozzle for a combustor in which a first guide tube whose inner diameter gradually decreases as it moves forward and a second guide tube that surrounds the first guide tube and whose inner diameter gradually decreases as it moves forward are fixed thereto.
  • a technology for forming a flame in a boiler combustion chamber in the form of a split flame after partial premixing with hydrogen supplied through a fuel nozzle including a flashback prevention means and an oxidant introduced with a swirling flow.
  • Korean Patent Publication No. 10-1324945 discloses an air supply pipe that introduces and supplies external air; A fuel supply pipe formed inside the air supply pipe and having a fuel ejection hole at the end thereof; and a diffuser configured between the fuel supply pipe and the air supply pipe so that the fuel injection hole is exposed to the combustion chamber to suppress the flow of air flowing from the air supply pipe into the combustion chamber, and the diffuser is configured to provide air from the air supply pipe. At least one air supply hole formed through the air to flow into the combustion chamber; and a dispersion guide port extending from at least a portion of the edge of the air supply hole toward the inside of the combustion chamber.
  • co-firing and full-firing combustors using hydrogen fuel require different combustion methods from existing ones due to the characteristics of hydrogen.
  • Existing natural gas and hydrogen fuel have different physical properties, and the total heat input generated from the fuel conversion demonstration combustor is It must be maintained the same as the existing combustion system using only natural gas, and the volumetric flow rate of hydrogen fuel increases as the co-combustion rate increases due to the low density of hydrogen.
  • hydrogen, a carbon-free fuel is mixed and burned in a low-pressure boiler burner exclusively for LNG and city gas, and multiple fuel nozzles are configured to form split flames in consideration of the fast combustion speed of hydrogen, thereby suppressing the production of nitrogen oxides, etc.
  • the present invention is intended to solve the above problems, and is divided into multiple fuel nozzles in consideration of the fast combustion speed of hydrogen while mixing and burning hydrogen, a carbon-free fuel, in a low-pressure boiler burner exclusively for LNG and city gas.
  • the purpose is to provide a burner in the form of partial premixing that forms a flame, suppresses the production of nitrogen oxides, etc., and prevents backfire.
  • the structure maintains the combustion air and fuel supply flow path platform from the existing commercialized boiler burner, Korean Patent Publication No. 10-1324945, and considering the characteristics of hydrogen combustion with a high combustion speed only at the burner head, hydrogen fuel is used.
  • the purpose is to provide a burner in the form of partial premixing that can suppress backfire of hydrogen flames by dividing the injection nozzle into multiple pieces.
  • the partial premixed burner for a boiler capable of preventing hydrogen fuel backfire of the present invention includes an oxidant supply pipe (100) through which an oxidant is supplied; A fuel supply pipe (200) formed inside the oxidant supply pipe; and a fuel nozzle 210 coupled to and in contact with a fuel baffle plate 220 formed on the inside of the fuel supply pipe.
  • the oxidizing agent supplied in the rotation may be formed by a swirl vane 214 that forms the oxidizing agent inlet slit.
  • the fuel and the oxidizer may be premixed in counterflow and/or jet-in-cross form.
  • the fuel discharge hole is formed in the fuel baffle plate in contact with the first fuel discharge hole 222 and/or the oxidizer inlet slit for injecting the fuel in a horizontal direction from the fuel baffle protrusion formed in the center of the fuel baffle plate. It may be a second fuel discharge hole 224 that injects the fuel in a vertical direction.
  • the fuel nozzle coupler 212 may be in contact with the fuel baffle plate, and the oxidant inlet slit may be formed in contact with the first end of the fuel supply pipe 223.
  • the location of the second fuel discharge hole may be formed in the middle of the tangential oxidant inlet slit between the swirl vanes, or may be formed at a rear end of the oxidant inlet slit immediately after passing the swirl vane.
  • the interior of the fuel nozzle includes a fuel nozzle outlet 213 at the fuel nozzle coupling port;
  • a cone-shaped shrinkage passage 215 in which the inner diameter in the direction decreases may be formed.
  • the interior of the fuel nozzle includes a fuel nozzle outlet 213 at the fuel nozzle coupling port;
  • a cone-shaped diffusion passage 216 whose inner diameter increases while passing through the throttling portion 217 in which the inner diameter decreases may be formed.
  • a plurality of fuel nozzles are formed inside the oxidant supply pipe, and the oxidant more than the theoretical equivalent ratio for combustion is classified and supplied to form a split flame.
  • the fuel nozzle may be formed to protrude from the oxidant baffle plate 110, or may be formed on the same plane.
  • a plurality of cooling nozzles 111 for cooling the fuel nozzle may be formed on the oxidizer baffle plate.
  • it may include a boundary layer breaking ring 218 formed inside the fuel nozzle in a ring shape, where the diameter of one end is the same as the inner diameter of the fuel nozzle and the diameter of the other end is smaller than the diameter of the one end.
  • an oxidizing agent inlet hole 219 may be formed through which an oxidizing agent for destroying the boundary layer is introduced into the fuel nozzle where the boundary layer destroying ring is formed.
  • a pilot fuel nozzle may be formed at a predetermined location around the fuel nozzle.
  • H2 hydrogen
  • a carbon-free fuel is mixed into low-pressure boiler burners exclusively for LNG and city gas commercially available for home and commercial use, resulting in partial mixed combustion (so-called clean combustion) and combustion of 100% hydrogen fuel only (so-called , full burning effect is possible.
  • the burner structure of Korean Patent Publication No. 10-1324945 maintains the combustion air and fuel supply passage platform as is, and considering the characteristics of hydrogen combustion with a high combustion speed only in the burner head, multiple hydrogen fuel injection nozzles are installed. It has the effect of suppressing the flashback of hydrogen flames by dividing it into (multiple) pieces.
  • the hydrogen injection nozzle guides the combustion air supplied from the air supply pipe 100 of the existing burner to the tangential vane and then injects it vertically into the combustion air flowing into the swirling flow.
  • the hydrogen injection nozzle holes are configured in a JIC (Jet in cross) form, so the injected hydrogen fuel and combustion air mix very quickly and well near the tip of the fuel nozzle, eliminating the risk of backfire and providing excellent combustion performance. It has the effect of premixed combustion characteristics.
  • Figure 1 is a perspective view of a burner for preventing flashback of a partial premix type according to an embodiment of the present invention.
  • Figure 2 is a cross-sectional view of a burner for preventing flashback of a partial premix type to which a first fuel discharge hole is applied according to an embodiment of the present invention.
  • Figure 3 is a cross-sectional view of the mixing of fuel and oxidant applied to the first fuel discharge hole of a partially premixed flashback prevention burner according to an embodiment of the present invention.
  • Figure 4 is a perspective view of a burner for preventing flashback of a partial premix type to which a second fuel discharge hole is applied according to an embodiment of the present invention.
  • Figure 5 is a cross-sectional view of the mixing of fuel and oxidant using the second fuel discharge hole of a burner for preventing flashbacks of a partial premix according to an embodiment of the present invention.
  • Figure 6 is a perspective view of various fuel nozzles of a partial premix type flashback prevention burner to which the first fuel discharge hole is applied according to an embodiment of the present invention.
  • Figure 7 is a perspective view of the fuel nozzle outlet and cooling injection port of a burner for preventing flashback of a partial premixed type according to an embodiment of the present invention.
  • Figure 8 is a perspective view of the boundary layer destruction ring inside the fuel nozzle of a burner for preventing flashback of a partial premix type according to an embodiment of the present invention.
  • Figure 9 shows the results of CFD flow analysis according to the presence or absence of a boundary layer breaking ring inside the fuel nozzle of a partially premixed flashback prevention burner according to an embodiment of the present invention.
  • the medium pressure of the low-pressure nozzle of a home or industrial boiler can be 2 bar or less.
  • the oxidizing agent may be air or oxygen.
  • the internal shape of the fuel nozzle may be one of a cone type, a supersonic nozzle of a reduced or expanded type, or a choke type.
  • a boundary layer breaking ring may be formed inside the fuel nozzle, and air may be introduced in a tangential direction to the fuel nozzle around the annular shape of the outer tube of the boundary layer breaking ring.
  • an oxidizing agent can be supplied to protect the nozzle from hydrogen flame. It may be formed at a location that can contact the oxidant supplied to the end of the fuel nozzle. The contact may take place in the form of an impinging jet.
  • Figure 1 is a perspective view of a burner for preventing flashback of a partial premix type according to an embodiment of the present invention.
  • the flame By modifying the outlet shape of the combustion nozzle, the flame can be divided into small independent flames to shorten the residence time of the flame, and by increasing the surface area of the flame, the flame temperature can be lowered to control thermal NOx.
  • a flame injector may be mounted at the end of the fuel nozzle to divide the flame into several small flames, the position of the fuel nozzle may be changed to separate the flame formation area, or the flame layer may be spread widely.
  • the flame split type burner has a short flame length, generates little uncombusted matter, and has excellent ignition properties and flame stability even during high-load combustion.
  • its suppression principle is similar to that of the mixing promotion type burner, it is effective in suppressing fuel nitrogen oxides (fuel NOx). A great effect cannot be expected.
  • the structure was designed in which premixed fuel and oxidant are injected from a plurality of fuel nozzles formed in the oxidizer supply pipe to form a split flame.
  • the fuel nozzle can be formed in various ways depending on the flame length condition.
  • three fuel nozzles can be formed in one oxidant supply pipe.
  • the number of fuel nozzles along the oxidizer supply pipe can increase or decrease depending on the change in diameter of the fuel nozzle.
  • Figure 2 is a cross-sectional view of a burner for preventing flashback of a partial premix type to which a first fuel discharge hole is applied according to an embodiment of the present invention.
  • a burner for preventing flashbacks in the form of partial premixing for a boiler includes an oxidizing agent supply pipe (100) through which an oxidizing agent is supplied; A fuel supply pipe (200) formed inside the oxidant supply pipe; and a fuel nozzle 210 coupled to and in contact with a fuel baffle plate 220 formed on the inside of the fuel supply pipe.
  • the fuel nozzle coupling port of the fuel nozzle may be formed in contact with the fuel baffle plate of the fuel supply pipe.
  • the coupling may be any one of a screw coupling, a fitting coupling, or a welding coupling.
  • the confidentiality of the combination is very important because the fuel used is hydrogen, which has a very high combustion rate and a high risk of backfire. Therefore, in the case of screw coupling or fitting coupling, a sealing washer or a sealing polymer material gasket can be applied to maintain additional sealing.
  • a plurality of oxidant supply slits may be formed in the cylindrical fuel nozzle.
  • the oxidizing agent supply slit may have either a rectangular or square shape.
  • the bottom of the oxidizing agent supply slit may coincide with the first end of the fuel supply pipe of the fuel supply pipe, and may be inserted into the fuel supply pipe at a certain length below the fuel nozzle where the oxidizing agent supply slit is formed and coupled to the fuel nozzle coupler while contacting the fuel nozzle coupler. You can.
  • the fuel baffle protrusion of FIG. 2 may be formed in the central part of the fuel baffle plate, preferably on the central axis.
  • the mixing effect can be increased by contacting the oxidant flowing into the swirling flow through the oxidant supply slit in a counter flow through the first fuel discharge hole formed on the fuel baffle protrusion.
  • Figure 3 is a cross-sectional view of the mixing of fuel and oxidant applied to the first fuel discharge hole of a partially premixed flashback prevention burner according to an embodiment of the present invention.
  • the oxidizing agent supplied in a swirl may be formed by a swirl vane 214 forming the tangential oxidizing agent inlet slit.
  • the fuel and the oxidizer may be premixed in counter-flow and/or jet in cross form.
  • the first fuel discharge hole formed at the end of the fuel baffle protrusion may be supplied by forming a pivot.
  • Fuel injected through the first fuel discharge hole may be supplied clockwise, counterclockwise, or tangentially.
  • the oxidizing agent flowing through the oxidizing agent supply slit may be supplied clockwise, counterclockwise, or tangentially.
  • the first fuel discharge holes may be formed in plural, and from 1 to 36 may be formed based on the circular cross section of the first fuel discharge holes.
  • the oxidizing agent supply slit may be formed in plurality, and may be formed from 1 to 36 based on the circular cross section of the oxidizing agent supply slit.
  • the linear speed of the fuel injected from the first fuel discharge hole may be faster or slower than the linear speed of the oxidizer.
  • Figure 4 is a perspective view of a burner for preventing flashback of a partial premix type to which a second fuel discharge hole is applied according to an embodiment of the present invention.
  • the fuel discharge hole is formed in the fuel baffle plate in contact with the first fuel discharge hole 222 and/or the oxidizer inlet slit for injecting the fuel in a horizontal direction from the fuel baffle protrusion formed in the center of the fuel baffle plate. It may be a second fuel discharge hole 224 that injects the fuel in a vertical direction.
  • the second fuel discharge hole may be formed on the surface of the oxidizing agent baffle plate coupled to the oxidizing agent inlet slit formed between the swirl vanes. It may be formed on the surface of the oxidizing agent baffle plate that has passed through the oxidizing agent inlet slit.
  • the diameter of the second fuel discharge hole may be the same or different.
  • the second fuel discharge hole may have an oxidizing agent inlet slit that may or may not be formed to correspond to the oxidizing agent inlet slit.
  • Figure 5 is a cross-sectional view of the mixing of fuel and oxidant using the second fuel discharge hole of a burner for preventing flashbacks of a partial premix according to an embodiment of the present invention.
  • the second fuel discharge holes may have a plurality of diameters.
  • the diameter of the second fuel discharge hole may be the same or different.
  • the linear speed of the fuel injected from the second fuel discharge hole may be faster or slower than the linear speed of the oxidizer.
  • the fuel nozzle coupler 212 may be in contact with the fuel baffle plate, and the oxidant inlet slit may be formed in contact with the first end of the fuel supply pipe 223.
  • the location of the second fuel discharge hole may be formed in the middle of the oxidizing agent inlet slit between the swirl vanes, or may be formed at a rear end of the oxidizing agent inlet slit immediately after passing through the swirl vanes.
  • Figure 6 is a perspective view of a fuel nozzle of a burner for preventing flashback of a partial premix type to which a first fuel discharge hole is applied according to an embodiment of the present invention.
  • the interior of the fuel nozzle includes a fuel nozzle outlet 213 at the fuel nozzle coupling port;
  • a cone-shaped shrinkage passage 215 in which the inner diameter in the direction decreases may be formed.
  • the interior of the fuel nozzle includes a fuel nozzle outlet 213 at the fuel nozzle coupling port;
  • a cone-shaped diffusion passage 216 whose inner diameter increases while passing through the constriction portion 217 in which the inner diameter decreases may be formed.
  • Figure 7 is a perspective view of the fuel nozzle outlet and cooling injection port of a burner for preventing flashback of a partial premixed type according to an embodiment of the present invention.
  • a plurality of fuel nozzles are formed inside the oxidant supply pipe, and the oxidant more than the theoretical air ratio for combustion is classified and supplied to form a split flame.
  • the fuel nozzle may be formed to protrude from the oxidant baffle plate 110, or may be formed on the same plane.
  • one or more cooling nozzles 111 for cooling the fuel nozzle may be formed on the oxidizer baffle plate.
  • Figure 8 is a perspective view of the boundary layer breaking ring of a burner for preventing flashbacks of a partial premix type according to an embodiment of the present invention.
  • it may include a boundary layer breaking ring 218 formed inside the fuel nozzle in a ring shape, where the diameter of one end is the same as the inner diameter of the fuel nozzle and the diameter of the other end is smaller than the diameter of the one end.
  • an oxidizing agent inlet hole 219 may be formed through which an oxidizing agent for destroying the boundary layer is introduced into the fuel nozzle where the boundary layer destroying ring is formed.
  • blower that pressurizes the external air for combustion above atmospheric pressure (maintaining about 20°C) and forcibly supplies it to the burner. At this time, the temperature of the external combustion air supplied to the burner after being preheated by the air preheater described above (about 178°C) is high, thereby promoting the generation of thermal nitrogen oxides.
  • an air preheater In boilers with high exhaust gas temperatures, an air preheater is installed to preheat combustion air to improve thermal efficiency.
  • a decrease in the preheating temperature of combustion air directly affects the combustion temperature. For example, if the preheating temperature of the air is lowered by 50°C, the adiabatic flame temperature decreases by about 25°C. Therefore, thermal nitrogen oxides can be reduced by lowering the air preheating temperature.
  • NOx can be reduced when water is sprayed onto the flame in the combustion chamber of the boiler through a water spray device.
  • the NOx generation rate can be reduced by about 40%.
  • It may be formed between the fuel nozzles or in the oxidant supply pipe.
  • a pilot fuel nozzle may be formed at a predetermined location around the fuel nozzle.
  • pilot fuel nozzle forms a pilot flame for ignition, when combustion of the burner through the fuel nozzle begins, combustion for the pilot flame is stopped.
  • air which is an oxidizing agent, may be continuously supplied through the pilot fuel nozzle.
  • Figure 9 shows the results of computational fluid flow (CFD) analysis according to the presence or absence of the boundary layer destruction ring 218 and the oxidant inlet hole 219 inside the fuel nozzle of a partially premixed flashback prevention burner according to an embodiment of the present invention.
  • CFD computational fluid flow
  • the number of grids created for CFD analysis was 1015781, and the turbulence model used was k-epsilon, compressible flow, which was assumed to converge after 2000 iterations.
  • Air velocity in the description of the present invention, refers to the oxidizing agent (air) injection speed for destroying the boundary layer through the oxidizing agent inlet hole 219.
  • air oxidizing agent
  • the oxidizing agent on the nozzle wall and the central area is The velocity gradient with the air is so severe that the flame shows a flow structure that can easily backfire along the wall of the fuel nozzle 210.
  • oxidizer air
  • the flame on the left as shown on the right As the boundary layer (blue layer) formed on the nozzle wall disappears, the flow structure inside the nozzle changes to a generally uniform flow, and it can be seen that it is reorganized into a flow structure that is advantageous for suppressing (preventing) flashbacks.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Abstract

La présente invention concerne un brûleur de type à prémélange partiel dans lequel de l'hydrogène, un combustible exempt de carbone, est mélangé et brûlé dans un brûleur de chaudière à basse pression dédié au GNL et au gaz de ville classique, et qui, en tenant compte de la vitesse de combustion rapide de l'hydrogène, est pourvu d'une pluralité de buses de combustible pour former des flammes divisées, ce qui permet de supprimer la formation de polluants tels que des oxydes d'azote et d'empêcher un retour de flamme.
PCT/KR2023/018469 2022-11-25 2023-11-16 Brûleur de chaudière de type à prémélange partiel capable d'empêcher le retour de flamme d'un combustible hydrogène WO2024112001A1 (fr)

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KR1020220160870A KR102586498B1 (ko) 2022-11-25 2022-11-25 수소연료 역화를 방지할 수 있는 보일러용 부분 예혼합형 버너
KR10-2022-0160870 2022-11-25

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KR102586498B1 (ko) * 2022-11-25 2023-10-11 순천대학교 산학협력단 수소연료 역화를 방지할 수 있는 보일러용 부분 예혼합형 버너

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