Hydrogen burner

Abstract

The utility model provides a hydrogen burner which comprises a hydrogen fuel interface flange connected into a hydrogen fuel source, the hydrogen fuel interface flange is communicated with a hydrogen distribution cavity through a primary hydrogen fuel pipeline, and a primary hydrogen fuel port and a secondary hydrogen fuel pipeline are respectively connected to the hydrogen distribution cavity; the ignition gun is inserted into the low-temperature jacket and the high-temperature jacket through the overhaul flange and is provided with a flame outlet hole and an ignition gun wind shield, and the nitrogen pipeline is inserted into the low-temperature jacket, the high-temperature jacket and other structures through the overhaul flange hole; the combustor has the advantages that the combustion secondary flame is diffused to the periphery of a hearth through disturbance of the arranged rotational flow disc to fresh air and hydrogen fuel combustion flame and guide of the outlet of the trumpet-shaped fire tube and the outlet tangential angle of the designed secondary fuel tube in the outward 45-degree direction, the length of the hydrogen flame with the high flow speed is shortened, and the combustion efficiency is improved. Diffusivity of fuel combustion of the secondary fuel pipe is achieved, flame is prevented from combusting at the tail of a hearth to generate high temperature, and safe and stable operation of the boiler is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of combustor, specifically relates to a hydrogen combustor. BACKGROUND

[0002] Hydrogen is a clean energy, but hydrogen also has some inherent characteristics, the burning speed is fast 170m / s easy backfire (natural gas 34m / s), hydrogen ignition point is 570 DEG C, the explosion limit range is big 4-75% easy explosion (natural gas: 5-15%); In addition, hydrogen combustion water vapor is more; The heat value is relatively low, and the equivalent combustion temperature of hydrogen in air is 1430 DEG C. In the use process of hydrogen combustion, although the ignition point of hydrogen is relatively high, the ignition ability is very small, so it is very easy to ignite, and the density of hydrogen is very small, the flame propagation speed is fast, it is difficult to ensure that hydrogen and oxygen in air are fully mixed by using the combustor of general structure, hydrogen is carried by airflow and flows to the bottom of the hearth or the outlet quickly before being completely combusted, and in addition, the flame is very long when hydrogen is combusted, which leads to combustion flame in the rear part of the hearth, causing the temperature of flue gas outlet to be too high, and the tail heating surface of the boiler is easy to be burnt out, causing the service life of the boiler to be reduced.

[0003] For example, in the published patent document, the patent application number CN202311535070.2 discloses a kind of anti-backfire hydrogen nozzle and hydrogen combustor, including nozzle assembly, the nozzle assembly is used to be connected with hydrogen combustor out fire end, nozzle assembly includes protective cylinder, protective cylinder top end is provided with receiving slot, receiving slot inside is inserted with fire component, protective cylinder bottom end is provided with outer expansion groove, fire component bottom end is connected with the inside of outer expansion groove, fire component top end is connected with the out fire end of hydrogen combustor in penetration;A kind of hydrogen combustor, the hydrogen combustor includes cylinder body, the mounting plate is fixed in cylinder body top end, cylinder body bottom end is inserted with protective cylinder, cylinder body bottom end outer wall is screwed with sleeve, cylinder body side wall is connected with first air inlet pipe, second air inlet pipe and igniter in penetration.

[0004] For example, China utility model patent application number 202221207306.0 discloses a kind of hydrogen combustor, including combustion box body and being located at the hydrogen conveying pipe of combustion box body, the combustion pipe with two ends open is located in the combustion box body, the outlet end of the hydrogen conveying pipe is located in the combustion pipe;Combustion box body side wall is provided with the air inlet that is communicated with the combustion pipe, the combustion box body is provided with the backflow component for the backflow of gas after combustion, the air inlet of backflow component is communicated with the top opening of combustion pipe, the air outlet of backflow component is communicated with the side of combustion pipe.

[0005] For example, utility model patent application No. 202121758803.5 discloses a low-nitrogen hydrogen gas burner with stable combustion, which comprises: an outer air channel; a central air channel located in the outer air channel; a gas and flue gas mixing gun located on one side of the second end of the outer air channel away from the first end of the outer air channel and outside the central air channel; an outer gas injection gun located in the outer air channel, with one end inserted into the gas and flue gas mixing gun and the other end extending to the first end of the outer air channel; a combustion stabilizing device clamped in the central air channel; a central gas channel located in the central air channel; and a middle layer gas injection gun located in the central air channel and outside the central gas channel.

[0006] The above-mentioned existing technologies all have the problem of high flue gas outlet temperature during the combustion of hydrogen, which can easily burn out the tail heating surface of the boiler, resulting in a significant decrease in the service life of the boiler. In addition, hydrogen has a fast combustion speed, and without technical innovation, there is a risk of deflagration. Utility model content

[0007] The utility model aims to provide a hydrogen gas burner, which aims to solve the above technical problems, improve the combustion utilization of hydrogen, and achieve the purpose of energy saving and environmental protection.

[0008] The hydrogen gas burner comprises: a hydrogen fuel source access hydrogen fuel interface flange, which is communicated with a hydrogen distribution cavity through a primary hydrogen fuel pipeline, and a primary hydrogen fuel port and a secondary hydrogen fuel pipe are respectively connected to the hydrogen distribution cavity to respectively transport hydrogen to a low-temperature outer sleeve and a high-temperature outer sleeve communicated with the low-temperature outer sleeve; an ignition gun is inserted into the low-temperature outer sleeve and the high-temperature outer sleeve through an overhauling flange to ignite the hydrogen entering the low-temperature outer sleeve and the high-temperature outer sleeve, and the ignition gun is provided with a flame outlet hole and an ignition gun wind shield to facilitate the ignition gun to ignite the hydrogen of the secondary hydrogen fuel pipe; a nitrogen pipeline is welded and fixed to the overhauling flange, the nitrogen pipeline is inserted into the low-temperature outer sleeve and the high-temperature outer sleeve through an overhauling flange hole to transport nitrogen to the low-temperature outer sleeve and the high-temperature outer sleeve, the nitrogen pipeline is welded and fixed to the overhauling flange, and the nitrogen pipeline can replace the nitrogen after the front and rear of the boiler hearth are purged, so that the high-concentration hydrogen remaining in the boiler hearth is avoided, and the safety of the equipment and operation is ensured; a fire observation hole and a flame detector are inserted into the low-temperature outer sleeve and the high-temperature outer sleeve through the overhauling flange, the fire observation hole is used to observe the hydrogen combustion condition of the low-temperature outer sleeve and the high-temperature outer sleeve, and the flame detector is used to detect the flame combustion condition in the low-temperature outer sleeve and the high-temperature outer sleeve; the low-temperature outer sleeve is supported on a combustion-supporting fresh air pipeline, the low-temperature outer sleeve is fixedly connected to the overhauling flange through a bolt, fresh air passes through a fresh air vent hole arranged on the combustion-supporting fresh air pipeline and enters the low-temperature outer sleeve, the high-temperature outer sleeve is communicated with the low-temperature outer sleeve, high-temperature combustion gas is discharged through a horn-shaped fire tube outlet connected with the high-temperature outer sleeve, and a cyclone disc is fixed to the secondary hydrogen fuel pipe.

[0009] Further, the combustion air fresh air pipe is provided with a baffle between the low temperature jacket, and a plurality of fresh air vent holes are uniformly arranged on the baffle.

[0010] Further, the ignition gun outlet is provided with an ignition gun flame outlet hole and an ignition gun wind deflector, so as to facilitate the ignition of the gas flame of the secondary hydrogen fuel pipe.

[0011] Further, the ignition gun is arranged close to the inner side of the swirler disc, so that the flame of the ignition gun is located at a position capable of facilitating the ignition of the hydrogen fuel from the hydrogen fuel pipe and the hydrogen fuel from the secondary hydrogen fuel pipe.

[0012] Further, the swirler disc is designed to be 20-40 degrees, so as to disturb the fresh air and the hydrogen fuel combustion flame.

[0013] Further, the swirler disc is designed to be 30 degrees, so as to disturb the fresh air and the hydrogen fuel combustion flame.

[0014] Further, the front end of the swirler disc is arranged at a distance of 5-15 mm from the center of the primary hydrogen fuel port.

[0015] Further, the front end of the swirler disc is arranged at a distance of 10 mm from the center of the primary hydrogen fuel port.

[0016] Further, two observation holes are symmetrically arranged on the maintenance flange, so as to facilitate the observation of the running flame state of the hydrogen burner.

[0017] Further, the horn-shaped fire tube outlet 6 and the outlet cut angle 8 of the designed secondary fuel pipe 7 are outwardly 45 degrees.

[0018] The hydrogen burner has the advantages and effects that:

[0019] 1. The swirler disc disturbs the fresh air and the hydrogen fuel combustion flame, and the horn-shaped fire tube outlet and the outlet cut angle of the designed secondary fuel pipe are outwardly 45 degrees, so that the burning secondary flame is diffused to the four corners of the furnace, the length of the hydrogen flame with high flow rate is shortened, the diffusivity of the secondary fuel pipe fuel combustion is realized, the high temperature generated by the flame burning at the tail of the furnace is avoided, and the safe and stable operation of the boiler is ensured.

[0020] 2. The ignition gun is fixed on the maintenance flange, parallelly passes through the low temperature jacket and the high temperature jacket, and the outlet is designed with an ignition gun flame outlet hole and an ignition gun wind deflector, which is convenient for establishing a branch ignition gun flame, the length of the ignition gun is designed to the inner side of the swirler disc, and the ignition gun flame is located at a position easy to ignite the primary hydrogen fuel and the secondary hydrogen fuel, which is very beneficial to the rapid ignition of the hydrogen fuel. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the three-dimensional structure schematic view of the hydrogen gas burner;

[0022] Figure 2 is Figure 1 the A direction structure schematic view in

[0023] Figure 3 is Figure 2 the left view section structure schematic view of

[0024] Figure 4 is the internal structure schematic view of the hydrogen gas burner;

[0025] Figure 5 is the combustion air fresh air pipeline three-dimensional structure schematic view of the hydrogen gas burner;

[0026] Figure 6 is the high temperature sleeve and the horn-shaped fire tube outlet connection three-dimensional structure schematic view of the hydrogen gas burner.

[0027] The figure shows:

[0028] 1, hydrogen fuel interface flange; 2, primary hydrogen fuel pipeline; 3, hydrogen distribution cavity; 4, low temperature sleeve; 5, high temperature sleeve; 6, horn-shaped fire tube outlet; 7, secondary hydrogen fuel pipeline; 8, secondary fuel pipeline outlet cut corner; 9, cyclone disc; 10, ignition gun; 11, nitrogen pipeline; 12, maintenance flange; 13, combustion air fresh air pipeline; 14, fresh air vent; 15, primary hydrogen fuel port; 16, flame detector; 17, observation hole; 18, ignition gun flame air outlet hole; 19, ignition gun wind deflector. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purpose, features and advantages of the present application more clearly understood, the technical solutions of the present application are further described in detail below in combination with the description of the drawings and specific embodiments.

[0030] As Figures 1-6As shown, the hydrogen burner includes: a hydrogen fuel interface flange 1 connected to a hydrogen fuel source; the hydrogen fuel interface flange 1 is connected to a hydrogen distribution chamber 3 via a primary hydrogen fuel pipeline 2; a primary hydrogen fuel port 15 and a secondary hydrogen fuel pipeline 7 are respectively connected to the hydrogen distribution chamber 3 to supply hydrogen to the cryogenic jacket 4 and the high-temperature jacket 5 connected to the cryogenic jacket 4; an ignition gun 10 is inserted into the cryogenic jacket 4 and the high-temperature jacket 5 via a maintenance flange 12 to ignite the hydrogen entering the cryogenic jacket 4 and the high-temperature jacket 5; the ignition gun 10 is equipped with a flame outlet 18 and an ignition gun baffle 19 to facilitate the ignition of the hydrogen in the secondary hydrogen fuel pipeline 8; and a nitrogen pipeline 11 is welded and fixed to the maintenance flange 12, and is inserted into the cryogenic jacket 4 and the high-temperature jacket 5 via the maintenance flange 12 to supply nitrogen to the cryogenic jacket 4 and the high-temperature jacket 5. The nitrogen pipeline 11 utilizes the inertia of nitrogen to ignite the hydrogen during furnace start-up and shutdown. The system is capable of performing nitrogen replacement after purging the boiler furnace to prevent the formation of high concentrations of stagnant hydrogen in the furnace and ensure the safety of equipment and operation. The observation port 17 and the flame detector 16 are inserted into the low-temperature jacket 4 and the high-temperature jacket 5 through the maintenance flange 12. The observation port 17 is used to observe the hydrogen combustion status in the low-temperature jacket 4 and the high-temperature jacket 5, and the flame detector 16 is used to detect the flame combustion status in the low-temperature jacket and the high-temperature jacket 5. The low-temperature jacket 4 is supported on the combustion-supporting fresh air duct 13 and is fixedly connected to the maintenance flange 12 by bolts. The combustion-supporting fresh air enters the low-temperature jacket 4 through the fresh air vent 14 set on the combustion-supporting fresh air duct 13. The high-temperature jacket 5 is connected to the low-temperature jacket 4. The low-temperature jacket 4 is the hydrogen low-temperature combustion chamber, and the high-temperature jacket 5 is the hydrogen high-temperature combustion chamber. The high-temperature combustion gas is discharged through the funnel-shaped fire tube outlet 6 connected to the high-temperature jacket 5. The swirl plate 9 is fixed to the secondary hydrogen fuel pipe 7.

[0031] In a specific embodiment, a partition is provided between the combustion-supporting fresh air duct 13 and the low-temperature jacket 4, and a plurality of fresh air vents 14 are evenly arranged on the partition.

[0032] In a specific embodiment, the outlet of the ignition gun 10 is provided with an ignition gun flame outlet 18 and an ignition gun wind deflector 19 to facilitate the establishment of a branch ignition gun 10 flame.

[0033] As a specific embodiment, such as Figure 4 As shown, the ignition gun 10 is positioned close to the inner side of the swirl plate 9 so that the flame of the ignition gun 10 is located at a position that facilitates the ignition of hydrogen fuel from the hydrogen fuel pipeline 2 and hydrogen fuel from the secondary hydrogen fuel pipeline 7.

[0034] As a specific embodiment, the swirl vanes of the swirl disk 9 are designed at an angle of 20-40 degrees to disturb the fresh air and hydrogen fuel combustion flame.

[0035] As a specific embodiment, the swirler disc 9 is designed at an angle of 30 degrees to disturb the fresh air and hydrogen fuel combustion flame.

[0036] As a specific embodiment, as shown in the figure, the swirler disc 9 is designed at an angle of 30 degrees to disturb the fresh air and hydrogen fuel combustion flame. Figure 4 As a specific embodiment, as shown in the figure, the swirler disc 9 is designed at an angle of 30 degrees to disturb the fresh air and hydrogen fuel combustion flame.

[0037] As a specific embodiment, as shown in the figure, the swirler disc 9 is designed at an angle of 30 degrees to disturb the fresh air and hydrogen fuel combustion flame. Figure 4 As a specific embodiment, as shown in the figure, the swirler disc 9 is designed at an angle of 30 degrees to disturb the fresh air and hydrogen fuel combustion flame.

[0038] As a specific embodiment, the observation hole 17 is symmetrically arranged on the maintenance flange 12 to facilitate observation of the hydrogen burner operation flame state.

[0039] As a specific embodiment, the horn-shaped fire tube outlet 6 and the outlet cut angle 8 of the secondary fuel pipe 7 are designed to be outwardly 45 degrees.

[0040] The working principle of the hydrogen burner is introduced as follows:

[0041] The hydrogen fuel source enters the distribution 3 under the action of the hydrogen source pressure through the hydrogen fuel interface flange 1, and is then sprayed from the primary hydrogen fuel port 15 and the secondary fuel pipe outlet 8 provided in the distribution cavity 3. Under the ignition of the ignition gun 10, the primary hydrogen fuel from the primary hydrogen fuel pipe 2 and the secondary hydrogen fuel from the secondary hydrogen fuel pipe 7 are ignited, and the secondary flame is diffused to the furnace around under the disturbance of the swirler disc 9 to the fresh air and hydrogen fuel combustion flame, and the direction guided by the horn-shaped fire tube outlet 6 and the outlet cut angle 8 of the secondary fuel pipe 7 being outwardly 45 degrees. The length of the hydrogen flame with fast flow rate is shortened, the diffusivity of the secondary fuel pipe fuel combustion is realized, the high temperature generated by the flame burning at the tail of the furnace is avoided, the safe and stable operation of the boiler is ensured, and the service life of the boiler is ensured.

[0042] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and these changes, modifications, replacements and variations will fall within the protection scope of the utility model claims.

Claims

1. A hydrogen burner, characterized by, The hydrogen gas burner comprises: a hydrogen gas fuel interface flange connected to a hydrogen gas fuel source, a primary hydrogen gas fuel pipe in communication with a hydrogen gas distribution cavity, a primary hydrogen gas fuel port and a secondary hydrogen gas fuel pipe connected to the hydrogen gas distribution cavity to respectively deliver hydrogen gas to a low-temperature jacket and a high-temperature jacket in communication with the low-temperature jacket; an ignition gun inserted into the low-temperature jacket and the high-temperature jacket through an inspection flange to ignite the hydrogen gas entering the low-temperature jacket and the high-temperature jacket, the ignition gun being provided with a flame outlet hole and an ignition gun wind deflector; a nitrogen gas pipe welded and fixed to the inspection flange, the nitrogen gas pipe being inserted into the low-temperature jacket and the high-temperature jacket through an inspection flange hole to deliver nitrogen gas to the low-temperature jacket and the high-temperature jacket, the nitrogen gas pipe being welded and fixed to the inspection flange; a fire hole and a flame detector inserted into the low-temperature jacket and the high-temperature jacket through the inspection flange; the flame detector being used to detect the flame burning condition in the low-temperature jacket and the high-temperature jacket; the low-temperature jacket being supported on a combustion-supporting fresh air pipe, the low-temperature jacket being fixedly connected to the inspection flange through bolts, combustion-supporting fresh air entering the low-temperature jacket through a fresh air vent hole provided on the combustion-supporting fresh air pipe, the high-temperature jacket being in communication with the low-temperature jacket, high-temperature combustion gas being discharged through a horn-shaped fire tube outlet connected to the high-temperature jacket, and a cyclone disc being fixed to the secondary hydrogen gas fuel pipe.

2. The hydrogen burner according to claim 1, characterized in that A partition plate is arranged between the combustion-supporting fresh air pipe and the low-temperature jacket, and a plurality of fresh air vent holes are uniformly arranged on the partition plate.

3. The hydrogen burner according to claim 1, wherein The ignition gun outlet is provided with an ignition gun flame outlet hole and an ignition gun wind deflector.

4. The hydrogen burner according to claim 1, wherein The ignition gun is arranged close to the inner side of the cyclone disc.

5. The hydrogen burner of claim 1, wherein The cyclone vane of the cyclone disc is designed to have an angle of 20-40 degrees.

6. The hydrogen burner of claim 1, wherein The cyclone vane of the cyclone disc is designed to have an angle of 30 degrees.

7. The hydrogen burner of claim 1, wherein The front end of the cyclone disc is arranged at a distance of 5-15 mm from the center of the primary hydrogen gas fuel port.

8. The hydrogen burner of claim 1, wherein The front end of the cyclone disc is arranged at a distance of 10 mm from the center of the primary hydrogen gas fuel port.

9. The hydrogen burner of claim 1, wherein Two fire holes are symmetrically arranged on the inspection flange.

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