Burner device suitable for stable combustion of low-heating-value coal gas
By setting up a combustion chamber, air spray hole and deflector design in the burner device, the problem of difficulty in stably burning of low-calorie gas in a room temperature environment is solved, and the stable combustion and temperature increase of low-calorie gas is achieved, ensuring operation reliability and safety.
Patent Information
- Application Number
- CN202421783156.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-07-26
AI Technical Summary
Low-calorie gas is difficult to burn stably in a room temperature environment, and often stops the combustion, which poses safety risks. The existing methods have high safety risks.
A combustion chamber is set up in the burner device, and the low-calorie gas is preheated with external fuel and ignited and burned. Combined with the air spray hole and deflector design, the mixing effect between air and gas is increased, the flame length is shortened, and the combustion chamber is used to maintain heat stability.
The stable combustion of low-calorie gas is achieved, the flame temperature is increased, the flame outage is avoided, and the operation reliability and safety is improved.
Smart Images
Figure CN223271265U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of metallurgical equipment, and further belongs to the technical field of steel rolling heating equipment, and specifically relates to a burner device with simple structure, reliable operation, easy operation, and suitable for stable combustion of low calorific value coal gas. Background Art
[0002] Steel billets need to be heated before rolling. The purpose of heating is to improve their plasticity and reduce their resistance to deformation. The function of a steel rolling furnace is to heat the billet to a uniform temperature suitable for rolling, thereby improving its plasticity and internal structure, reducing its resistance to deformation, and facilitating its deformation. Heating aims to achieve an austenitic structure suitable for rolling, improving the steel's plasticity and reducing its resistance to deformation, thereby facilitating deformation during the rolling process. Heating also improves the internal structure and properties of the billet, homogenizing any uneven structure and non-metallic inclusions through the diffusion effect of high-temperature heating.
[0003] Steel rolling mill heating furnaces often use low-calorific-value gases such as blast furnace gas and converter gas for heating. Typically, dedicated converter gas burners are installed and used during design. However, in actual production, blast furnace gas is often used for heating when converter gas has a low calorific value or converter gas is unavailable. The theoretical combustion temperature of low-calorific-value gases at room temperature is approximately 1300°C. However, due to the continuous heat transfer to the surroundings during combustion, the flame temperature is approximately 900°C, making it difficult to maintain stable combustion at room temperature. In this case, the furnace burner struggles to burn stably, often experiencing flameout. This forces the use of unconventional methods, which carry significant safety risks. The best way to ensure stable combustion of low-calorific-value gases is to preheat them before ignition and combustion, raising the flame temperature. Therefore, the key to solving this problem is to develop a burner device with a simple structure, reliable operation, and ease of operation, suitable for the stable combustion of low-calorific-value gases. Utility Model Content
[0004] The purpose of the utility model is to provide a burner device which has a simple structure, reliable operation, and is easy to operate and is suitable for the stable combustion of low calorific value coal gas.
[0005] The purpose of the present utility model is achieved in this way, including a gas pipe, an air pipe, an air distribution joint, a burner body, a sealing cover, a combustion chamber, a burner brick, an air nozzle hole, and a guide plate, wherein an air distribution joint is provided at the left end face of the burner body, and the right end is connected to the furnace wall of the heating furnace; the air distribution joint is cylindrical, and an air distribution annular groove is provided on the cylindrical wall; a gas pipe is provided on the inner hole of the air distribution joint; an air pipe is provided on the outer wall of the air distribution joint; a sealing cover is provided on the cylinder wall of the right end of the burner body; a combustion chamber is provided inside the right end of the burner body; a burner brick is provided inside the left end of the burner body; the burner brick is cylindrical, and a plurality of air nozzle holes are provided on the cylinder wall; a guide plate is provided on the inner hole of the burner brick; the air nozzle holes are connected to the air distribution annular groove of the air distribution joint.
[0006] The utility model is composed of a gas pipe, an air pipe, an air distribution joint, a burner body, a sealing cover, a combustion chamber, a burner brick, an air spray hole, and a guide plate; the air pipe supplies air and cools the burner brick at the same time; the air spray hole is an inclined hole, which makes the air rotate after being guided, thereby increasing the mixing of air and low calorific value gas, and preheating the air and low calorific value gas at the same time; the guide plate makes the low calorific value gas rotate after being guided, thereby increasing the mixing of air and low calorific value gas, and shortening the flame length; the combustion chamber makes the air and low calorific value gas mix and burn therein, and preheats the air and low calorific value gas at the same time, thereby reducing the heat transfer of the flame outward.
[0007] For a heating furnace using low calorific value gas as fuel, the theoretical combustion temperature of the low calorific value gas at room temperature is about 1300°C. During the combustion process, it continuously transfers heat to the surroundings, and its flame temperature is about 900°C, making it difficult to maintain stable combustion in a room temperature environment. Preheating the low calorific value gas before igniting and burning it can stabilize the combustion and increase its flame temperature. The utility model provides a combustion chamber in the burner body, and uses external fuel to heat the burner body during ignition. When low calorific value gas is supplied, the combustion chamber is used to heat the low calorific value gas and then burn it to increase its flame temperature. Once stable combustion is achieved, the flame of the low calorific value gas can continue to transfer heat to the combustion chamber, so that the heat in the combustion chamber remains relatively stable, ultimately achieving the purpose of stabilizing the flame.
[0008] The steps are as follows:
[0009] 1. Open the sealing cover on the burner body and put firewood or other flammable materials into the combustion chamber.
[0010] 2. Open the valve on the air pipe to supply a small amount of air, ignite the flammable materials in the combustion chamber, and close the sealing cover after stable combustion.
[0011] 3. Open the valve on the gas pipe to supply low calorific value gas, and the low calorific value gas burns in the combustion chamber.
[0012] 4. Since the air nozzles on the burner bricks have a rotation angle, and the guide plate also has a rotation angle, when the air and gas rotate and mix and burn in the combustion chamber, the mixing can be more complete and the flame is greatly shortened.
[0013] 5. When the added flammable materials and gas are burning in the combustion chamber, the combustion chamber can be heated. After the flammable materials are burned, the combustion chamber can be used as an ignition source to continuously heat the supplied air and gas. At the same time, the gas flame after the low calorific value gas is burned continues to transfer heat to the combustion chamber, thereby maintaining the stable combustion of the low calorific value gas flame.
[0014] The utility model has the advantages of simple structure, reliable operation and convenient operation and is suitable for the stable combustion of low calorific value coal gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 for Figure 1 Left side view;
[0017] Figure 3 for Figure 1 AA cross-sectional view;
[0018] Figure 4 This is a schematic diagram of the working state of the utility model.
[0019] In the figure: 1-gas pipe, 2-air pipe, 3-air distribution joint, 4-burner body, 5-sealing cover, 6-combustion chamber, 7-burner brick, 8-air nozzle hole, 9-guide plate, 10-heating furnace wall. DETAILED DESCRIPTION
[0020] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes made based on the teachings of the present invention fall within the scope of protection of the present invention.
[0021] like Figures 1 to 4As shown, the utility model includes a gas pipe 1, an air pipe 2, an air distribution joint 3, a burner body 4, a sealing cover 5, a combustion chamber 6, a burner brick 7, an air nozzle hole 8, and a guide plate 9. The air distribution joint 3 is provided at the left end face of the burner body 4, and the right end is connected to the furnace wall 10 of the heating furnace; the air distribution joint 3 is cylindrical, and an air distribution annular groove is provided on the cylindrical wall; the gas pipe 1 is provided on the inner hole of the air distribution joint 3; the air pipe 2 is provided on the outer wall of the air distribution joint 3; a sealing cover 5 is provided on the right end cylinder wall of the burner body 4; the combustion chamber 6 is provided inside the right end of the burner body 4; the burner brick 7 is provided inside the left end of the burner body 4; the burner brick 7 is cylindrical, and a plurality of air nozzle holes 8 are provided on the cylinder wall; a guide plate 9 is provided on the inner hole of the burner brick 7; the air nozzle hole 8 is connected to the air distribution annular groove of the air distribution joint 3.
[0022] The gas pipe 1 is made of a stainless steel pipe.
[0023] The air pipe 2 is made of a stainless steel pipe.
[0024] The air distribution annular groove of the air distribution joint 3 is communicated with the air pipe 2 .
[0025] The outer shell of the burner body 4 is made of steel plate, and refractory material is poured into the interior.
[0026] The air spray holes 8 are inclined holes.
[0027] The working principle and working process of this utility model:
[0028] The air pipe 2 of the utility model supplies air and cools the burner brick 7 at the same time; the air nozzle 8 is an inclined hole, which allows the air to rotate after being guided, thereby increasing the mixing of air and low calorific value gas, and preheating the air and low calorific value gas at the same time; the guide plate 9 allows the low calorific value gas to rotate after being guided, thereby increasing the mixing of air and low calorific value gas, and shortening the flame length; the combustion chamber 6 allows the air and low calorific value gas to be mixed and burned here, and simultaneously preheats the air and low calorific value gas, and reduces the heat transfer of the flame to the outside.
[0029] In a heating furnace using low calorific value gas as fuel, the theoretical combustion temperature of the low calorific value gas at room temperature is about 1300°C. During the combustion process, it continuously transfers heat to the surroundings, and its flame temperature is about 900°C, making it difficult to maintain stable combustion in a room temperature environment. Preheating the low calorific value gas before igniting and burning it can stabilize the combustion and increase its flame temperature. The utility model provides a combustion chamber 6 within the burner body 4. During ignition, the burner body 4 is heated by external fuel. When low calorific value gas is supplied, the low calorific value gas is heated by the combustion chamber 6 and then burned to increase its flame temperature. Once stable combustion is achieved, the flame of the low calorific value gas can continue to transfer heat to the combustion chamber 6, so that the heat in the combustion chamber 6 remains relatively stable, ultimately achieving the purpose of stabilizing the flame.
[0030] The steps are as follows:
[0031] 1. Open the sealing cover 5 on the burner body 4 and put firewood or other flammable materials into the combustion chamber 6.
[0032] 2. Open the valve on the air pipe 2 to supply a small amount of air, ignite the flammable materials in the combustion chamber 6, and close the sealing cover 5 after stable combustion.
[0033] 3. Open the valve on the gas pipe 1 to supply low calorific value gas, and the low calorific value gas burns in the combustion chamber 6.
[0034] 4. Since the air nozzle 8 on the burner brick 7 has a rotation angle, and the guide plate 9 also has a rotation angle, when the air and gas rotate and mix and burn in the combustion chamber 6, the mixing can be more complete and the flame is greatly shortened.
[0035] 5. When the added combustible materials and the gas are burned in the combustion chamber 6, the combustion chamber 6 can be heated. After the combustible materials are burned, the combustion chamber 6 can be used as an ignition source to continuously heat the supplied air and gas. At the same time, the gas flame after the low calorific value gas is burned continues to transfer heat to the combustion chamber 6, thereby maintaining the stable combustion of the low calorific value gas flame.
Claims
1. A burner device suitable for stable combustion of low calorific value gas, comprising a gas pipe (1), an air pipe (2), an air distribution joint (3), a burner body (4), a sealing cover (5), a combustion chamber (6), a burner brick (7), an air nozzle hole (8), and a guide plate (9), wherein: An air distribution joint (3) is provided at the left end face of the burner body (4), and the right end is connected to the furnace wall (10) of the heating furnace; the air distribution joint (3) is cylindrical, and an air distribution annular groove is provided on the cylindrical wall; a gas pipe (1) is provided on the inner hole of the air distribution joint (3); an air pipe (2) is provided on the outer wall of the air distribution joint (3); a sealing cover (5) is provided on the right end cylinder wall of the burner body (4); a combustion chamber (6) is provided inside the right end of the burner body (4); a burner brick (7) is provided inside the left end of the burner body (4); the burner brick (7) is cylindrical, and a plurality of air spray holes (8) are provided on the cylinder wall; a guide plate (9) is provided on the inner hole of the burner brick (7); the air spray holes (8) are communicated with the air distribution annular groove of the air distribution joint (3).
2. The burner device suitable for stable combustion of low calorific value gas according to claim 1 is characterized in that: The gas pipe (1) is made of a stainless steel pipe.
3. The burner device suitable for stable combustion of low calorific value gas according to claim 1 is characterized in that: The air pipe (2) is made of a stainless steel pipe.
4. The burner device suitable for stable combustion of low calorific value gas according to claim 1 is characterized in that: The air distribution annular groove of the air distribution joint (3) is communicated with the air pipe (2).
5. The burner device suitable for stable combustion of low calorific value gas according to claim 1 is characterized in that: The outer shell of the burner body (4) is made of steel plate, and refractory material is poured inside.
6. The burner device suitable for stable combustion of low calorific value gas according to claim 1 is characterized in that: The air spray hole (8) is an oblique hole.