Combustion structure of all-hydrogen bell-type annealing furnace

Abstract

The utility model discloses a combustion structure of an all-hydrogen bell-type annealing furnace, which comprises a combustion piece, an air distribution disc, an air cavity pipe, a fuel gas cavity pipe, a delivery pipe, a storage chamber, a delivery pump and an electromagnetic valve, when a certain amount of waste hydrogen is accumulated in the storage chamber, the electromagnetic valve is opened, and the waste hydrogen in the storage chamber is pumped into the combustion cavity through a nozzle by the delivery pump; meanwhile, fuel gas is conveyed to a combustion chamber through a fuel gas cavity pipe through a second gas inlet pipe, ignition is conducted, waste hydrogen is combusted and recycled, a large amount of waste hydrogen is stored in advance, meanwhile, the proportion of the waste hydrogen to the fuel gas can be roughly adjusted by arranging a conveying pump and an electromagnetic valve, and the fuel gas utilization rate during waste hydrogen combustion is increased; air forms high-speed rotational flow through the inclined groove notches which are annularly and uniformly distributed and formed in the peripheral side of the air distribution disc body, the inclined groove flow guide grooves are matched with the inner wall of the combustion cavity to be used for extending the inclined groove notches, the rotational flow effect formed by the air is enhanced, and the mixing strength of the air, coal gas and waste hydrogen is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a combustion structure of a full hydrogen hood-type annealing furnace. Background Art

[0002] Waste hydrogen containing rolling fluid needs to be recycled and processed. Usually, a hydrogen burner is added to the heating hood of the bell-type furnace, and the waste hydrogen is ignited by a long-light ignition burner, so that the waste hydrogen generated by hot blowing re-enters the heating hood for combustion, thereby realizing the recycling of waste hydrogen.

[0003] The existing Chinese patent with authorization announcement number CN102424910B discloses a burner for a full hydrogen bell-type annealing furnace and a method for introducing and burning waste hydrogen using the burner, which mainly includes a combustion chamber, an air distribution plate, a gas nozzle, an air duct, a gas flow pipe, and a double electrode; the combustion of gas and waste hydrogen is integrated into the same burner, and when waste hydrogen is introduced, the gas is used as a long-open flame to ignite the waste hydrogen, thereby ensuring the safety and stability of the waste hydrogen combustion; the air is divided into three levels at the air distribution plate for mixed combustion, and the gas is ejected using an end-face uniformly distributed jet, which accelerates the mixing speed of the gas, waste hydrogen and air, ensures the stability of the burner combustion and the reliability of ignition and flame monitoring, and uses a high-speed burner to burn the waste hydrogen at a high speed, while recycling resources, and ensuring the uniformity of the furnace temperature through high-speed convection circulation of flue gas.

[0004] The above-mentioned existing technical solutions have the following shortcomings: the generation of waste hydrogen is intermittent, there is no waste hydrogen storage mechanism in the existing technology, and the ratio of waste hydrogen to fuel gas cannot be adjusted, resulting in a low fuel gas utilization rate during waste hydrogen combustion, and there is still room for improvement in terms of economy. Utility Model Content

[0005] The utility model aims to provide a combustion structure of a full hydrogen bell-type annealing furnace to solve the technical problems in the prior art that waste hydrogen is generated intermittently, no waste hydrogen storage mechanism is provided in the prior art, the ratio of waste hydrogen to fuel gas cannot be adjusted, and the fuel gas utilization rate during waste hydrogen combustion is low, and there is still room for improvement in terms of economy.

[0006] The technical problem to be solved by the utility model can be achieved through the following technical solutions:

[0007] A combustion structure of a full hydrogen bell-type annealing furnace, comprising:

[0008] The air distribution plate comprises an air distribution plate body, wherein the air distribution plate body is evenly distributed in an annular shape and provided with oblique groove notches, wherein the radial notches of each oblique groove notch form a slope in a clockwise or counterclockwise direction at the same time, and an oblique groove guide groove is provided along the extension track direction of the oblique groove notch, and a through groove is provided through the middle of the air distribution plate body, and a nozzle is provided in the through groove;

[0009] A combustion component, wherein a combustion chamber is provided in the combustion component, an inclined groove guide groove is arranged in the combustion chamber, the diameter of the outlet end of the combustion component is slightly shrunk, an installation pressure ring is arranged at the inlet end of the combustion component, an air distribution disc is fixedly installed in the installation pressure ring, a delivery pipe is arranged on the air distribution disc body, one end of the delivery pipe is connected with the nozzle, and the other end of the delivery pipe is connected with a storage chamber, a gas cavity tube is sleeved on the outer side of the delivery pipe, the gas cavity tube is connected with the combustion chamber through the gap between the nozzle and the inner wall of the through groove, an air cavity tube is sleeved on the outer side of the gas cavity tube, and the air cavity tube is connected with the combustion chamber through the inclined groove notch.

[0010] As a further solution of the utility model: the inclined groove guide groove is fixedly connected to the air distribution disk body, the through groove is a circular through groove, the nozzle is coaxially sleeved in the through groove, and a connecting block is provided between the nozzle and the inner wall of the through groove.

[0011] As a further solution of the utility model: the nozzle is fixedly connected to the inner wall of the through groove through a connecting block.

[0012] As a further solution of the utility model: one end of the air cavity tube is fixedly connected to the mounting pressure ring at the inlet end of the combustion element, the other end of the air cavity tube is fixedly connected to a sealing cover plate, and the air cavity tube is connected to an air inlet pipe for supplying air.

[0013] As a further solution of the utility model: one end of the gas cavity tube is fixedly connected to the air distribution disk body, the other end of the gas cavity tube is fixedly connected to a sealing cover plate 2, and the gas cavity tube is connected to an air inlet pipe 2 for supplying gas.

[0014] As a further solution of the utility model: a delivery pump and a solenoid valve are fixedly installed on the delivery pipe, and the storage chamber is connected to an intake pipe three for supplying waste hydrogen.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model collects waste hydrogen generated intermittently through a storage chamber. When a certain amount of waste hydrogen accumulates, the solenoid valve is opened and the waste hydrogen in the storage chamber is pumped into the combustion chamber through the nozzle by a delivery pump. At the same time, the gas is delivered to the combustion chamber through the gas cavity pipe through the intake pipe 2 and ignited to burn and recover the waste hydrogen. By storing a large amount of waste hydrogen in advance and setting a delivery pump and a solenoid valve, the ratio of waste hydrogen to gas can be roughly adjusted, thereby improving the gas utilization rate during waste hydrogen combustion and improving the economic efficiency of the device;

[0017] 2. When the utility model is in operation, air forms a high-speed swirl through the oblique groove gaps evenly distributed in an annular shape around the main body of the air distribution disk, thereby accelerating the mixing intensity of air, coal gas and waste hydrogen. An oblique groove guide groove is provided along the extension trajectory direction of the oblique groove gap. The oblique groove guide groove cooperates with the inner wall of the combustion chamber to serve as an extension of the oblique groove gap, thereby strengthening the swirl effect formed by the air, further accelerating the mixing intensity of air, coal gas and waste hydrogen, and improving the gas utilization rate during the combustion of waste hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0020] Figure 2 It is a schematic diagram of the front cross-sectional structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the wind tray of the utility model. Figure 1 ;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the wind tray of the utility model. Figure 2 .

[0024] In the figure: 1. combustion part; 2. air distribution disc; 21. air distribution disc body; 22. inclined slot notch; 23. inclined slot guide groove; 24. through groove; 25. nozzle; 26. connecting block; 3. air cavity tube; 4. air intake pipe one; 5. fuel gas cavity tube; 6. air intake pipe two; 7. delivery pipe; 8. storage chamber; 9. delivery pump; 10. solenoid valve; 11. air intake pipe three; 12. combustion chamber. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-Figure 5 As shown, a combustion structure of a full hydrogen bell-type annealing furnace comprises:

[0027] The air distribution plate 2 comprises an air distribution plate body 21, and the air distribution plate body 21 is provided with oblique groove notches 22 evenly distributed in an annular shape around the air distribution plate body 21, and the radial notches of each oblique groove notch 22 form a slope in a clockwise or counterclockwise direction at the same time, and an oblique groove guide groove 23 is provided along the extension track direction of the oblique groove notch 22, and a through groove 24 is provided through the middle of the air distribution plate body 21, and a nozzle 25 is provided in the through groove 24;

[0028] A combustion element 1, in which a combustion chamber 12 is provided, a chute guide groove 23 is arranged in the combustion chamber 12, the diameter of the outlet end of the combustion element 1 is slightly shrunk, a mounting pressure ring is arranged at the inlet end of the combustion element 1, an air distribution disc 2 is fixedly installed in the mounting pressure ring, a delivery pipe 7 is arranged on the air distribution disc body 21, one end of the delivery pipe 7 is connected with the nozzle 25, and the other end of the delivery pipe 7 is connected with the storage chamber 8, a gas cavity tube 5 is sleeved on the outside of the delivery pipe 7, and the gas cavity tube 5 is connected with the combustion chamber 12 through the gap between the nozzle 25 and the inner wall of the through groove 24, and an air cavity tube 3 is sleeved on the outside of the gas cavity tube 5, and the air cavity tube 3 is connected with the combustion chamber 12 through the chute notch 22.

[0029] The inclined groove guide groove 23 is fixedly connected to the air distribution disk body 21, the through groove 24 is a circular through groove, the nozzle 25 is coaxially sleeved in the through groove 24, a connecting block 26 is provided between the nozzle 25 and the inner wall of the through groove 24, and the nozzle 25 is fixedly connected to the inner wall of the through groove 24 through the connecting block 26.

[0030] One end of the air cavity tube 3 is fixedly connected to the mounting pressure ring at the inlet end of the combustion element 1, and the other end of the air cavity tube 3 is fixedly connected to a sealing cover plate 1. The air cavity tube 3 is connected to an air intake pipe 4 for supplying air, and one end of the gas cavity tube 5 is fixedly connected to the air distribution disk body 21, and the other end of the gas cavity tube 5 is fixedly connected to a sealing cover plate 2. The gas cavity tube 5 is connected to an air intake pipe 2 6 for supplying gas. The air intake pipe 2 6 is provided with a pump for pumping gas into the gas cavity tube 5 and an on-off valve for controlling the on-off of the air intake pipe 2 6. A delivery pump 9 and a solenoid valve 10 are fixedly installed on the delivery pipe 7, and the storage chamber 8 is connected to an air intake pipe 3 11 for supplying waste hydrogen.

[0031] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

[0032] When in use, the intermittently generated waste hydrogen is collected through the storage chamber 8. When a certain amount of waste hydrogen accumulates, the solenoid valve 10 is opened and the waste hydrogen in the storage chamber 8 is pumped into the combustion chamber 12 through the nozzle 25 through the delivery pump 9. At the same time, the gas is delivered to the combustion chamber 12 through the gas cavity pipe 5 through the intake pipe 26 and ignited to burn and recover the waste hydrogen. By pre-storing a large amount of waste hydrogen and setting the delivery pump 9 and the solenoid valve 10, the ratio of waste hydrogen to gas can be roughly adjusted, the gas utilization rate during the combustion of waste hydrogen is improved, and the economy of the device is improved. The air forms a high-speed swirl through the chute notch 22 evenly distributed and opened on the side of the air distribution plate body 21, accelerating the mixing intensity of air, coal gas and waste hydrogen. A chute guide groove 23 is provided along the extension track of the chute notch 22. The chute guide groove 23 cooperates with the inner wall of the combustion chamber 12 to serve as an extension of the chute notch 22, thereby strengthening the swirl effect formed by the air, further accelerating the mixing intensity of air, coal gas and waste hydrogen, and improving the gas utilization rate during the combustion of waste hydrogen.

[0033] Several embodiments of the utility model are described in detail above, but the embodiments of the utility model are not limited thereto and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A combustion structure of a full hydrogen bell annealing furnace, characterized in that: include: An air distribution plate (2) comprises an air distribution plate body (21), wherein the air distribution plate body (21) is provided with oblique groove notches (22) evenly distributed in an annular pattern around the circumference thereof, wherein radial notches of each oblique groove notch (22) simultaneously form a clockwise or counterclockwise slope, an oblique groove guide groove (23) is provided along the extension track direction of the oblique groove notch (22), a through groove (24) is provided through the middle of the air distribution plate body (21), and a nozzle (25) is provided in the through groove (24); A combustion element (1) is provided with a combustion chamber (12) in the combustion element (1), an inclined groove guide groove (23) is arranged in the combustion chamber (12), the diameter of the outlet end of the combustion element (1) is slightly shrunk, an installation pressure ring is arranged at the inlet end of the combustion element (1), an air distribution disc (2) is fixedly installed in the installation pressure ring, a delivery pipe (7) is arranged on the air distribution disc body (21), one end of the delivery pipe (7) is connected to the nozzle (25), the other end of the delivery pipe (7) is connected to the storage chamber (8), a gas cavity tube (5) is sleeved on the outer side of the delivery pipe (7), the gas cavity tube (5) is connected to the combustion chamber (12) through the gap between the nozzle (25) and the inner wall of the through groove (24), an air cavity tube (3) is sleeved on the outer side of the gas cavity tube (5), and the air cavity tube (3) is connected to the combustion chamber (12) through the inclined groove notch (22).

2. The combustion structure of a full hydrogen bell annealing furnace according to claim 1, characterized in that: The inclined groove guide groove (23) is fixedly connected to the air distribution disk body (21); the through groove (24) is a circular through groove; the nozzle (25) is coaxially sleeved in the through groove (24); and a connecting block (26) is provided between the nozzle (25) and the inner wall of the through groove (24).

3. The combustion structure of a full hydrogen bell annealing furnace according to claim 2, characterized in that: The nozzle (25) is fixedly connected to the inner wall of the through groove (24) via a connecting block (26).

4. The combustion structure of a full hydrogen bell annealing furnace according to claim 1, characterized in that: One end of the air cavity tube (3) is fixedly connected to the mounting pressure ring at the inlet end of the combustion element (1), and the other end of the air cavity tube (3) is fixedly connected to a sealing cover plate 1. The air cavity tube (3) is connected to an air inlet pipe 1 (4) for supplying air.

5. The combustion structure of a full hydrogen bell annealing furnace according to claim 1, characterized in that: One end of the gas cavity tube (5) is fixedly connected to the air distribution disk body (21), and the other end of the gas cavity tube (5) is fixedly connected to a second sealing cover plate. The gas cavity tube (5) is connected to a second air inlet pipe (6) for supplying gas.

6. The combustion structure of a full hydrogen bell annealing furnace according to claim 1, characterized in that: A delivery pump (9) and a solenoid valve (10) are fixedly mounted on the delivery pipe (7), and an air inlet pipe (11) for supplying waste hydrogen is connected to the storage chamber (8).

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