A staged combustion hydrogen combustion head

Abstract

The utility model relates to hydrogen energy utilization technical field especially is a kind of hierarchical combustion hydrogen combustion head, including, gas distribution box, combustion port and shell, the side fixed communication of gas distribution box has the communication component, the inner chamber of shell is located at the communication component, the communication component includes secondary hydrogen gas inlet, secondary hydrogen gas inlet side and gas distribution chamber fixed communication, the side fixed nozzle for hydrogen gas delivery of secondary hydrogen gas inlet, by the structure of the diameter reduction of secondary hydrogen gas can make gas velocity promote, form turbulent flow, promote the rapid mixing of hydrogen and air, by diffusion part expansion deceleration, again even release in the gas hole of tail pipe, mix in the vicinity of combustion port with primary combustion product, form diffusion combustion flame, by the injection speed and mixing intensity of secondary hydrogen gas control, avoid local high temperature, further inhibit NO x generated at the same time reduces the risk of tempering.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen energy utilization technology, specifically to a staged combustion hydrogen burner. Background Technology

[0002] Hydrogen, as a clean and renewable energy source, produces only water as a combustion product and emits no pollutants such as carbon dioxide and sulfur dioxide. It is considered an important direction for future energy development. However, hydrogen has an extremely high reaction rate and a very fast flame propagation speed, about eight times that of natural gas. This makes hydrogen combustion prone to backfire, posing a safety hazard. It also causes problems such as uneven combustion head temperature leading to carbon buildup.

[0003] Because hydrogen reacts quickly, it is usually controlled by a cyclone separator during primary combustion, making it less likely for backfire or even flameout to occur. Therefore, the risk of backfire during secondary combustion is easily overlooked, which affects combustion efficiency and may even lead to explosions that endanger the safety of workers. In addition, traditional burners have uneven temperatures during combustion, causing problems such as carbon buildup and affecting the lifespan of the burner.

[0004] Therefore, a staged combustion hydrogen burner is needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a staged combustion hydrogen burner to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A staged combustion hydrogen burner includes a gas distribution box, a combustion port, and a shell. A connecting component is fixedly connected to one side of the gas distribution box. The connecting component is located inside the shell. The connecting component includes a secondary hydrogen inlet. One side of the secondary hydrogen inlet is fixedly connected to the gas distribution chamber. A nozzle for hydrogen delivery is fixedly attached to one side of the secondary hydrogen inlet. An outer pipe is movably connected to the surface of the secondary hydrogen inlet. One side of the outer pipe is fixedly connected to the input end of the secondary hydrogen inlet. The nozzle is located inside the outer pipe. A secondary air duct is fixedly connected to the top of the outer pipe. A throat for hydrogen speed regulation is fixedly connected to the other side of the outer pipe. A secondary hydrogen diffuser is fixedly connected to the other side of the throat. A tail pipe is fixedly connected to one side of the secondary hydrogen diffuser. A secondary hydrogen outlet for balanced hydrogen release is opened on one side of the tail pipe.

[0008] Furthermore, the input end of the secondary air duct is fixedly connected to an external wall connection port, and the inner cavity of the gas distribution box is fixed with partitions for division. There are two sets of partitions, and the intervals divided by the partitions are hydrogen premixing chambers.

[0009] Furthermore, the gas distribution box is divided into two additional partitions by a partition, which are secondary hydrogen storage chambers, and these secondary hydrogen storage chambers are fixedly connected to the connecting components.

[0010] Furthermore, a primary hydrogen inlet is fixedly connected to one side of the gas distribution box, and a primary air duct is fixedly connected to one side of the gas distribution box.

[0011] Furthermore, a T-shaped inlet pipe is fixedly connected to one side of the primary hydrogen inlet, and the two ends of the T-shaped inlet pipe pass through two sets of partitions and enter the secondary hydrogen storage chamber.

[0012] Furthermore, a central air duct is fixedly connected to one side of the gas distribution box, and the central air duct is fixedly connected to the hydrogen premixing chamber. A premixed hydrogen outlet is provided on the surface of the central air duct.

[0013] Furthermore, a primary premixed hydrogen diffusion section is fixedly connected to one side of the gas distribution box, a cyclone separator is fixedly connected to one side of the primary premixed hydrogen diffusion section, and a flame stabilizer is fixedly connected to the outer wall of the combustion port.

[0014] Compared with the prior art, the technical effects and advantages of this utility model are as follows: The connecting component provided by this utility model enables secondary hydrogen to increase its velocity through the narrowing structure, forming turbulence and promoting rapid mixing of hydrogen and air. Simultaneously, the diffusion section expands and decelerates the secondary hydrogen before it is evenly released through the outlet of the tailpipe. Near the combustion port, it mixes with the primary combustion products to form a diffusion combustion flame. By controlling the injection speed and mixing intensity of the secondary hydrogen, localized high temperatures are avoided, further suppressing NO. x This process reduces the risk of tempering. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a rear view of the present invention;

[0017] Figure 3 This is a top sectional view of the present invention;

[0018] Figure 4 This is a structural diagram of the connecting component of this utility model;

[0019] In the diagram: 1. Gas distribution box; 2. Combustion port; 201. Outer shell; 3. Connecting assembly; 301. Secondary hydrogen inlet; 302. Nozzle; 303. Outer pipe; 304. Secondary air duct inlet; 305. Throat; 306. Secondary hydrogen diffuser; 307. Tailpipe; 308. Secondary hydrogen outlet; 4. Baffle; 5. Hydrogen premixing chamber; 6. Secondary hydrogen storage chamber; 7. Primary hydrogen inlet; 701. Primary air duct inlet; 8. T-shaped inlet pipe; 9. Central air duct; 901. Premixed hydrogen outlet; 10. Primary premixed hydrogen diffuser; 11. Swirl generator; 12. Flame stabilizer; 13. Outer wall connection port. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper end," "lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figures 1 to 4 This utility model provides a technical solution:

[0024] A staged combustion hydrogen burner includes a gas distribution box 1, a combustion port 2, and a housing 201. A connecting component 3 is fixedly connected to one side of the gas distribution box 1. The connecting component 3 is located inside the housing 201. The connecting component 3 includes a secondary hydrogen inlet 301. One side of the secondary hydrogen inlet 301 is fixedly connected to the gas distribution chamber. A nozzle 302 for hydrogen delivery is fixedly attached to one side of the secondary hydrogen inlet 301. One side of an outer pipe 303 is fixedly connected to the input end of the secondary hydrogen inlet 301. The nozzle 302 is located in the inner cavity of the outer tube 303. The outer tube 303 is movably connected to the surface of the secondary hydrogen inlet 301. The top of the outer tube 303 is fixedly connected to the secondary air duct 304. The other side of the outer tube 303 is fixedly connected to the throat 305 for hydrogen speed change. The other side of the throat 305 is fixedly connected to the secondary hydrogen diffuser 306. One side of the secondary diffuser is fixedly connected to the tail tube 307. A secondary hydrogen outlet 308 for balanced hydrogen release is opened on one side of the tail tube 307.

[0025] It should be noted that, as Figure 1 , Figure 4 As shown, the connecting component 3 consists of four sets. The secondary hydrogen outlets 308 of all four sets are aligned with the center of the flame stabilizer disc 12 to prevent excessively high temperatures on one side, which could lead to carbon buildup and burner head wear, reducing the burner head's lifespan. When hydrogen enters the secondary air inlet, it is released through the nozzle 302 inside. Simultaneously, the secondary air duct 304 above it also introduces secondary air (air), which mixes with the hydrogen reaching the inner cavity in the throat 305. The narrowing design of the throat 305 utilizes the Venturi effect to accelerate the airflow and increase its speed, ensuring thorough and uniform mixing of hydrogen and air. This mixture is then evenly released around the burner head through the secondary hydrogen outlets 308. After being accelerated by the throat 305, the mixed airflow expands and decelerates through the secondary hydrogen diffuser 306, and is then evenly released through the outlet of the tailpipe 307. Near the combustion port 2, it mixes with the primary combustion products to form a diffusion combustion flame. During this stage, by controlling the injection speed and mixing intensity of the secondary hydrogen, localized high temperatures are avoided, further suppressing NO. x generate.

[0026] In the specific implementation process, such as Figure 1 The input end of the secondary air duct 304 shown is fixedly connected to the outer wall connection port 13. The inner cavity of the gas distribution box 1 is fixed with a partition 4 for division. There are two sets of partitions 4, and the interval divided by the partitions 4 is the hydrogen premixing chamber 5.

[0027] In the specific implementation process, such as Figure 3 The gas distribution box 1 shown is divided into two other sections by the partition 4, which are secondary hydrogen storage chambers 6. The secondary hydrogen storage chambers 6 are fixedly connected to the connecting component 3.

[0028] It should be noted that the partition 4 makes it easy to identify each chamber, which can better deliver hydrogen or air and other combustion-supporting gases to it, thus solving the fuel delivery problem of staged combustion. The positions of the two sets of partitions 4 are determined by the ratio of premixed gas to hydrogen required during specific combustion, thereby precisely controlling the fuel output.

[0029] In the specific implementation process, such as Figure 1 The gas distribution box 1 shown is fixedly connected to a primary hydrogen inlet 7 on one side and a primary air duct 701 on one side.

[0030] In the specific implementation process, such as Figure 1 A T-shaped inlet pipe 8 is fixedly connected to one side of the primary hydrogen inlet 7. The two ends of the T-shaped inlet pipe 8 pass through two sets of partitions 4 and enter the secondary hydrogen storage chamber 6.

[0031] It should be noted that, as Figure 2 , Figure 3 All air inlets in this device have threads on their outer walls to ensure better airtightness, as the fuel being transported is gas. This prevents leakage at the connection ports during prolonged use. Two sets of baffles 4 divide the gas distribution chamber into three chambers. The primary hydrogen inlet 7 works with a T-shaped pipe to deliver hydrogen to the three chambers. The primary air duct 701 supplies air or other gases that mix with hydrogen to aid combustion to the hydrogen premixing chamber 5, preventing the mixing of other gases during staged combustion and enhancing the staged combustion effect.

[0032] In the specific implementation process, such as Figure 1 The gas distribution box 1 shown is fixedly connected to a central air duct 9 on one side. The central air duct 9 is fixedly connected to the hydrogen premixing chamber 5. A premixed hydrogen outlet hole 901 is opened on the surface of the central air duct 9.

[0033] In the specific implementation process, such as Figure 1 A primary premixed hydrogen diffuser 10 is fixedly connected to one side of the gas distribution box 1 shown. A cyclone separator 11 is fixedly connected to one side of the primary premixed hydrogen diffuser 10. A flame stabilizer 12 is fixedly connected to the outer wall of the combustion port 2.

[0034] It should be noted that, as Figure 3 As shown, the premixed gas is delivered to the combustion zone through the central air duct 9 and uniformly sprayed out through the premixed hydrogen outlet 901 on the surface of the central air duct 9. Through the action of the cyclone separator 11, the primary premixed gas generates a rotating airflow, forming a central recirculation zone, stabilizing the flame root, and forming a stable premixed flame. During this stage, the combustion temperature is relatively low, and NO... xThe amount generated is small. At the same time, the swirler 11 causes the primary premixed gas to generate a rotating airflow, forming a central recirculation zone, stabilizing the flame root. In conjunction with the flame stabilizer 12, it generates local turbulence to enhance the flame adhesion and prevent flameout or backfire during the first combustion.

[0035] The working principle of this embodiment is as follows: In specific use, when the burner head is required, primary hydrogen enters the gas distribution box 1 through the primary hydrogen inlet 7, and is diverted to the secondary hydrogen storage chambers 6 on both sides via the T-shaped inlet pipe 8; at the same time, primary air enters through the primary air duct 701, and is initially mixed with hydrogen in the hydrogen premixing chamber 5 (formed by partition 4). Then, the premixed hydrogen is discharged into the cyclone separator 11 through the central air duct 9 and the premixed hydrogen outlet 901. The cyclone separator 11 forces the premixed hydrogen... As the blades of the cyclone separator 11 rotate, a rotating jet is formed. The rotating airflow generates strong turbulent pulsations in both the radial and axial directions, significantly increasing the collision frequency of gas molecules. This results in a more uniform mixing of hydrogen and air, and the improved mixing efficiency ensures that the fuel-oxidant ratio in the combustion zone is close to the stoichiometric ratio. This reduces incomplete combustion caused by local oxygen deficiency and lowers the formation of hydrocarbons (HC). Then, an ignition gun (such as an electric spark igniter) is used to ignite the premixed gas near the combustion port 2, forming a stable primary flame for premixed combustion. The flame is blue and at a low temperature. The flame status is observed through the flame stabilizer 12 to ensure there is no flameout or backfire. After confirming the primary flame is stable, secondary hydrogen from the hydrogen storage chamber is injected through nozzle 302. At the same time, air connected to the outer wall connection port 13 enters the inner cavity of the outer tube 303, causing the secondary hydrogen and air to mix in the throat 305. The secondary hydrogen is accelerated by nozzle 302 and fully mixed with air in the throat 305 before reaching the secondary hydrogen diffuser 306 and decelerating. It is then evenly and at a constant speed injected into the primary combustion flame through the secondary hydrogen outlet 308, forming a secondary flame around the combustion port 2. The diffused combustion flame is pale blue and has a high brightness. Although the secondary combustion zone has sufficient oxygen, the staged combustion design allows for gradual mixing of secondary air and fuel, resulting in a more uniform combustion temperature distribution and avoiding localized high temperatures. NOx generation remains at a low level. Simultaneously, the acceleration through the throat 305 and the deceleration through the secondary hydrogen diffuser 306 ensure that the secondary hydrogen is injected evenly and at a constant speed, reducing the risk of backfire.

[0036] If the flame is not blue when igniting premixed hydrogen, it may be due to insufficient primary air leading to oxygen-deficient combustion. If the flame is yellow and flickers unstable, and the flame temperature decreases, it may be due to excessive secondary air causing localized high flame temperatures, which may trigger the formation of nitrogen oxides. In this case, the flame color may be whitish or bright yellow. Depending on the specific flame color, appropriate protective measures should be taken to avoid accidents. Furthermore, if the flame color is abnormal during primary combustion, secondary hydrogen mixing and injection should not be carried out.

[0037] The remaining parts not described in this utility model are existing or known technologies.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A staged combustion hydrogen burner, characterized in that, The system includes a gas distribution box (1), a combustion port (2), and a housing (201). A connecting component (3) is fixedly connected to one side of the gas distribution box (1). The connecting component (3) is located within the inner cavity of the housing (201). The connecting component (3) includes a secondary hydrogen inlet (301). One side of the secondary hydrogen inlet (301) is fixedly connected to the gas distribution chamber. A nozzle (302) for hydrogen delivery is fixedly attached to one side of the secondary hydrogen inlet (301). An outer pipe (303) is movably connected to the surface of the secondary hydrogen inlet (301). One side of the outer pipe (303)... The nozzle (302) is fixedly connected to the input end of the secondary hydrogen inlet (301), and is located in the inner cavity of the outer tube (303). The top of the outer tube (303) is fixedly connected to a secondary air duct (304), and the other side of the outer tube (303) is fixedly connected to a throat (305) for hydrogen speed change. The other side of the throat (305) is fixedly connected to a secondary hydrogen diffuser (306), and one side of the secondary hydrogen diffuser (306) is fixedly connected to a tail pipe (307). A secondary hydrogen outlet (308) for balanced hydrogen release is opened on one side of the tail pipe (307).

2. The staged combustion hydrogen burner according to claim 1, characterized in that, The input end of the secondary air duct (304) is fixedly connected to the outer wall connection port (13), and the inner cavity of the gas distribution box (1) is fixed with a partition (4) for division. There are two sets of partitions (4), and the intervals divided by the partitions (4) are hydrogen premixing chambers (5).

3. The staged combustion hydrogen burner according to claim 2, characterized in that, The gas distribution box (1) is divided into two other sets of partitions by the partition (4), which are secondary hydrogen storage chambers (6), and the secondary hydrogen storage chambers (6) are fixedly connected to the connecting component (3).

4. The staged combustion hydrogen burner according to claim 1, characterized in that, One side of the gas distribution box (1) is fixedly connected to a primary hydrogen inlet (7), and one side of the gas distribution box (1) is fixedly connected to a primary air duct (701).

5. A staged combustion hydrogen burner according to claim 4, characterized in that, A T-shaped inlet pipe (8) is fixedly connected to one side of the primary hydrogen inlet (7). The two ends of the T-shaped inlet pipe (8) pass through two sets of partitions (4) and enter the secondary hydrogen storage chamber (6).

6. The staged combustion hydrogen burner according to claim 1, characterized in that, The gas distribution box (1) is fixedly connected to a central air duct (9) on one side. The central air duct (9) is fixedly connected to the hydrogen premixing chamber (5). The surface of the central air duct (9) is provided with a premixed hydrogen outlet hole (901).

7. The staged combustion hydrogen burner according to claim 1, characterized in that, A primary premixed hydrogen diffuser (10) is fixedly connected to one side of the gas distribution box (1), a cyclone separator (11) is fixedly connected to one side of the primary premixed hydrogen diffuser (10), and a flame stabilizer (12) is fixedly connected to the outer wall of the combustion port (2).

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