A new type of hot blast stove burner
By designing gas and air distribution chambers, vortex zones, and swirl-angle nozzles in the hot blast stove burner, the problems of uneven mixing and unstable flame in the burner were solved, improving combustion efficiency and stability, reducing nitrogen oxide generation, and achieving efficient energy utilization and safety.
Patent Information
- Application Number
- CN202521271626.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-30
- Estimated Expiration
- 2035-06-20
AI Technical Summary
Traditional hot blast stove burners suffer from problems such as low combustion efficiency, uneven mixing, unstable flame, easy flameout, backfire, and high nitrogen oxide generation, which affect the operational safety and energy utilization of the hot blast stove.
The design employs a gas and air distribution chamber, which, through the combination of air rising channels and gas falling channels with the mixing burner, forms a vortex zone to ensure rapid and uniform mixing. The design of the nozzle with a swirl angle improves combustion efficiency and stability. Combined with the compact burner structure and hot air outlet design, it achieves efficient combustion and heat recovery.
It improves combustion efficiency and stability, reduces nitrogen oxide generation, lowers energy consumption, enhances burner safety and space utilization, and achieves efficient energy utilization.
Smart Images
Figure CN224434393U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a hot blast stove burner, and in particular to a novel hot blast stove burner. Background Technology
[0002] In industries such as iron and steel metallurgy, increasing blast furnace blast temperature is crucial for reducing coke ratio and improving pig iron production and quality. As a key piece of equipment for generating high-temperature blast, the hot blast stove burner needs continuous improvement to meet the demands of higher blast temperatures. For example, early hot blast stoves could only reach blast temperatures of around 1000℃, but with technological advancements, today's advanced hot blast stoves can reach blast temperatures of 1250℃ or even higher.
[0003] Traditional hot blast stove burners suffer from low combustion efficiency and low energy conversion efficiency, leading to significant energy waste. To achieve energy conservation and emission reduction goals, it is necessary to develop efficient combustion technologies and burner structures to improve energy utilization. For example, by improving burner design, the combustion efficiency of hot blast stoves can be increased from the original 70%-75% to 99.99%. Environmental protection requirements are becoming increasingly stringent, with lower and lower limits on the emission of pollutants such as particulate matter, sulfur dioxide, and nitrogen oxides from hot blast stove flue gas. Therefore, burners need to adopt technologies such as low-NOx combustion to reduce pollutant emissions.
[0004] In traditional non-premixed combustion methods, the mixing rate of gas and combustion air within the burner is slow and uneven, leading to incomplete combustion, low combustion efficiency, and increased nitrogen oxide formation. Under different operating conditions, such as load changes and fluctuations in gas composition, the burner is prone to problems such as flame instability, flameout, and backfire, affecting the normal operation and safety of the hot blast stove. Therefore, the improvement and innovation of burners are urgent issues that need to be addressed. Utility Model Content
[0005] In view of the above situation and to overcome the defects of the existing technology, the purpose of this utility model is to provide a hot air furnace burner that can effectively solve the problems of uneven mixing, incomplete combustion, low combustion efficiency, increased nitrogen oxide generation, and easy occurrence of flame instability, flameout, and backfire in existing burners.
[0006] One of the technical solutions provided by this utility model includes a burner body, which is composed of a straight wall section below the dome. A gas distribution chamber is provided on the upper outer wall of the straight wall section, and a gas inlet is provided on the outer side of the gas distribution chamber. An air distribution chamber is provided on the lower outer wall of the straight wall section, and an air inlet is provided on the outer side of the air distribution chamber. An air rising channel and a gas falling channel are provided in the straight wall section inside the gas distribution chamber and the air distribution chamber. The air rising channel and the gas falling channel are respectively connected to a number of exhaust gas mixing burners provided along the inner wall of the burner body via air branch pipes and gas branch pipes. A hot air outlet is also provided on the upper part of the outer wall of the burner body.
[0007] Furthermore, the gas distribution chamber is connected to the gas descending channel via the gas channel inlet, and the air distribution chamber is connected to the air ascending channel via the air channel inlet.
[0008] Furthermore, the air-gas mixing burner is provided with five rows, one above the other.
[0009] Furthermore, there are two gas inlets and two air inlets, which are positioned opposite each other on the same horizontal line of the burner body.
[0010] Furthermore, the gas distribution chamber and air distribution chamber are at a 60° angle to the central axis of the burner body.
[0011] Furthermore, the air rising channel and the gas falling channel are respectively connected to the V-shaped air branch pipe and the V-shaped gas branch pipe. The V-shaped air branch pipe and the V-shaped gas branch pipe are arranged in several rows on the same plane with several exhaust gas mixing burners, which can quickly mix air and gas and improve the combustion rate.
[0012] The second technical solution provided by this utility model includes a burner body, which is composed of an arch. A gas inlet is provided on the upper outer wall of the arch, and a gas distribution chamber is provided in the arch wall corresponding to the gas inlet. An air inlet is provided on the lower outer wall of the arch, and an air distribution chamber is provided in the arch wall corresponding to the air inlet. An air rising channel and a gas falling channel are provided in the arch wall inside the gas distribution chamber and the air distribution chamber. The air rising channel and the gas falling channel are respectively connected to a row of air-gas mixing burners provided along the inner wall of the burner body via air branch pipes and gas branch pipes. A hot air outlet is also provided at the top of the burner body.
[0013] Furthermore, the gas distribution chamber is connected to the gas descending channel via the gas channel inlet, and the air distribution chamber is connected to the air ascending channel via the air channel inlet.
[0014] Furthermore, the air rising channel and the gas falling channel are respectively connected to the V-shaped air branch pipe and the V-shaped gas branch pipe. The V-shaped air branch pipe and the V-shaped gas branch pipe are arranged on the same plane as the air-gas mixing burner 7, which can quickly mix air and gas and improve the combustion rate.
[0015] Furthermore, the air-gas mixing burner is a nozzle with a 30-60° tangential angle to the central axis of the burner body. The beneficial technical effects of this invention are:
[0016] 1. There are two gas inlets and two air inlets, which are set opposite each other on the same horizontal plane. After the sprayed mixed gas collides with the air, it quickly fills the entire burner and generates different vortices at different angles, thus avoiding the formation of uneven flow field phenomenon in the swirling gas.
[0017] 2. The multi-row gas mixing burner can operate and distribute itself from top to bottom directly in the vortex region after injection, so that the vortex region can be fully mixed and burned, which greatly improves the combustion efficiency.
[0018] 3. The air branch pipe and gas branch pipe are V-shaped and are arranged in several rows on the same plane as several rows of air-gas mixing burners. This promotes rapid mixing of air and gas, further ensures uniform mixing, and improves combustion efficiency, combustion speed and combustion stability.
[0019] 4. The gas distribution chamber and air distribution chamber can gather the gas and air together in advance, which has the function of stabilizing the flow and effectively avoids the problem of insufficient premixing.
[0020] 5. The air-gas mixing burner is a nozzle with a 30-60° swirl angle to the central axis of the burner body, which allows the gas and air to be sprayed out in a swirl manner, further enhancing the mixing degree between the two, making the combustion more complete and improving the thermal energy utilization rate.
[0021] 6. The burner body is constructed with an arched roof. This structural design can withstand high temperatures and pressures, ensuring the stability and safety of the burner.
[0022] 7. The gas distribution chamber, air distribution chamber, air rising channel, and gas falling channel are all located inside the arched wall, making reasonable use of the space of the burner body, making the structure more compact and reducing the floor space occupied.
[0023] 8. A hot air outlet is provided at the top of the burner body, which can discharge the high-temperature hot air generated by combustion for use in other process steps, realizing the recovery and utilization of heat, improving the energy utilization rate of the entire system, and reducing energy consumption. Attached Figure Description
[0024] Figure 1 This is a front view of the structural cross-section of this utility model.
[0025] Figure 2 This utility model Figure 1 Schematic diagram of section 1-1.
[0026] Figure 3 This utility model Figure 1 Schematic diagram of section 2-2.
[0027] Figure 4 This utility model Figure 1 Schematic diagram of section 3-3.
[0028] Figure 5 This is a structural schematic diagram of another technical solution of this utility model.
[0029] Figure 6 This utility model Figure 5 A schematic diagram of the AA cross-section.
[0030] Figure 7 This utility model Figure 5 A schematic diagram of the BB cross-section.
[0031] Figure 8 This utility model Figure 5 A schematic diagram of the CC cross-section.
[0032] In the attached diagram, the components are: burner body 1, gas inlet 2, gas distribution chamber 3, air inlet 4, air distribution chamber 5, air rising channel 6a, gas falling channel 6b, air-gas mixing burner 7, gas channel inlet 8, air channel inlet 9, and hot air outlet 10. Detailed Implementation
[0033] 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.
[0034] One of the technical solutions provided by this utility model is, with reference to Figure 1-4This utility model includes a burner body 1, which is composed of a straight wall section below the dome. A gas distribution chamber 3 is provided on the upper outer wall of the straight wall section, and a gas inlet 2 is provided on the outer side of the gas distribution chamber 3. An air distribution chamber 5 is provided on the lower outer wall of the straight wall section, and an air inlet 4 is provided on the outer side of the air distribution chamber 5. An air rising channel 6a and a gas falling channel 6b are provided in the straight wall section inside the gas distribution chamber 3 and the air distribution chamber 5. The air rising channel 6a and the gas falling channel 6b are respectively connected to a plurality of exhaust gas mixing burners 7 provided along the inner wall of the burner body 1 via air branch pipes and gas branch pipes. A hot air outlet 10 is also provided on the upper part of the outer wall of the burner body 1.
[0035] Furthermore, refer to Figure 2 The gas distribution chamber 3 is connected to the gas descending channel 6b via the gas channel inlet 8, and the air distribution chamber 5 is connected to the air ascending channel 6a via the air channel inlet 9.
[0036] Furthermore, refer to Figure 1 The air-gas mixing burner 7 is provided with five rows, which can be distributed from top to bottom facing the vortex region after injection, so that the vortex region can be fully mixed and burned, greatly improving the combustion efficiency.
[0037] Furthermore, refer to Figure 2-4 The gas inlet 2 and air inlet 4 are each provided in pairs, and are positioned opposite each other on the same horizontal line of the burner body 1. After the sprayed mixed gas collides with the air, it quickly fills the entire burner and generates different vortices at different angles, thus avoiding uneven flow field phenomenon caused by swirling gas.
[0038] Furthermore, refer to Figure 2-4 The gas distribution chamber 3 and the air distribution chamber 5 are at a 60° angle to the central axis of the burner body 1. The flow field formed by this angle is uniform, which significantly improves the combustion effect.
[0039] Furthermore, refer to Figure 3 The air rising channel 6a and the gas falling channel 6b are respectively connected to the V-shaped air branch pipe and the V-shaped gas branch pipe. The V-shaped air branch pipe and the V-shaped gas branch pipe are arranged in several rows on the same plane with several exhaust gas mixing burners 7, which can quickly mix air and gas and improve the combustion rate.
[0040] The second technical solution provided by this utility model is, with reference to Figure 5-8This utility model includes a burner body 1, which is formed by an arch. A gas inlet 2 is provided on the upper outer wall of the arch, and a gas distribution chamber 3 is provided in the arch wall corresponding to the gas inlet 2. An air inlet 4 is provided on the lower outer wall of the arch, and an air distribution chamber 5 is provided in the arch wall corresponding to the air inlet 4. An air rising channel 6a and a gas falling channel 6b are provided in the arch wall inside the gas distribution chamber 3 and the air distribution chamber 5. The air rising channel 6a and the gas falling channel 6b are respectively connected to a row of air-gas mixing burners 7 arranged along the inner wall of the burner body 1 via air branch pipes and gas branch pipes. A hot air outlet 10 is also provided at the top of the burner body 1. Further, refer to Figure 7 The gas distribution chamber 3 is connected to the gas descending channel 6b via the gas channel inlet 8, and the air distribution chamber 5 is connected to the air ascending channel 6a via the air channel inlet 9.
[0041] Furthermore, refer to Figure 3 The air rising channel 6a and the gas falling channel 6b are respectively connected to the V-shaped air branch pipe and the V-shaped gas branch pipe. The V-shaped air branch pipe and the V-shaped gas branch pipe are arranged on the same plane as the air-gas mixing burner 7, which can quickly mix air and gas and improve the combustion rate.
[0042] Furthermore, the air-gas mixing burner 7 is a nozzle with a 30-60° tangential angle to the central axis of the burner body.
[0043] In use, the gas in this invention enters the gas distribution chamber 3 located on the upper part of the straight section wall below the arch through the gas inlet 2. The gas in the gas distribution chamber 3 is gathered through the gas descending channel 6b and injected into the burner via the air-gas mixing burner 7. Air enters the air distribution chamber 5 located on the lower part of the straight section wall through the air inlet 4. The air in the air distribution chamber 5 is gathered through the air ascending channel 6a and injected into the burner via the air-gas mixing burner 7. Because the gas inlet 2 and the air inlet 4 are set opposite each other on the same horizontal plane, the mixed gas ejected from the air-gas mixing burner 7 quickly fills the entire burner after convection and collision. Different vortices are generated at different angles, avoiding uneven flow field phenomenon caused by swirling gas. Moreover, multiple rows of air-gas mixing burners 7 can operate and distribute from top to bottom directly in front of the vortex area after injection, so that the vortex area is fully mixed and burned, greatly improving the combustion efficiency.
[0044] In the second technical solution, the gas enters the gas distribution chamber 3, located in the lower wall of the arch, through the gas inlet 2. The gas in the distribution chamber 3 is then gathered through the gas descending channel 6b and injected into the burner via the air-gas mixing burner 7. Air enters the air distribution chamber 5, located in the upper wall of the arch, through the air inlet 4. The air in the air distribution chamber 5 is gathered through the air ascending channel 6a and injected into the burner via the air-gas mixing burner 7. After mixing in the air-gas mixing burner 7, the gas and air generate a vortex in the same direction by the air-gas mixing burner 7, which is inclined on the inner wall of the arch. The air-gas mixing burner is a nozzle with a 30-60° tangential angle to the central axis of the burner body, allowing the gas and air to be ejected in a tangential manner, further enhancing the mixing degree, making combustion more complete, and improving thermal energy utilization. The structural design of the burner body located in the arch can withstand high temperatures and pressures, ensuring the stability and safety of the burner. The gas distribution chamber, air distribution chamber, air riser channel, and gas fallr channel are all located within the arched wall, making efficient use of the burner body's space, resulting in a more compact structure and reduced floor space. A hot air outlet is located at the top of the burner body, allowing the high-temperature hot air generated during combustion to be discharged for use in other processes, achieving heat recovery and utilization, improving the overall system's energy efficiency, and reducing energy consumption.
[0045] In both technical solutions, the gas distribution chamber and air distribution chamber also play a role in stabilizing the flow. The design of the air-gas mixing ring can promote uniform mixing and reduce the generation of nitrogen oxides. The number and distribution of the mixing burners improve the stability of the flame and the temperature distribution. The air branch pipe and the gas branch pipe are V-shaped. In one technical solution, several rows of air-gas mixing burners 7 are set on the same plane, which promotes rapid mixing of air and gas, further ensures uniform mixing, and improves combustion efficiency, combustion speed and combustion stability. In the other technical solution, the air-gas mixing burners 7 are set on the same plane. The air-gas mixing burners 7 are nozzles with a 30-60° tangential angle to the central axis of the burner body. The arrangement of the burners ensures flame stability and is a major innovation in hot air furnace burners, with good economic and social benefits.
[0046] It should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any person skilled in the art who can make modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution shall fall within the protection scope of the present utility model.
Claims
1. A novel hot blast stove burner, comprising a burner body, characterized in that, The burner body (1) is composed of a straight section wall below the dome. A gas distribution chamber (3) is provided on the upper outer wall of the straight section wall. A gas inlet (2) is provided on the outer side of the gas distribution chamber (3). An air distribution chamber (5) is provided on the lower outer wall of the straight section wall. An air inlet (4) is provided on the outer side of the air distribution chamber (5). An air rising channel (6a) and a gas falling channel (6b) are alternately provided in the straight section wall inside the gas distribution chamber (3) and the air distribution chamber (5). The air rising channel (6a) and the gas falling channel (6b) are connected to several exhaust gas mixing burners (7) provided along the inner wall of the burner body (1) via air branch pipes and gas branch pipes, respectively. A hot air outlet (10) is also provided on the upper part of the outer wall of the burner body (1).
2. The novel hot blast stove burner according to claim 1, characterized in that, The gas distribution chamber (3) is connected to the gas descending channel (6b) via the gas channel inlet (8), and the air distribution chamber (5) is connected to the air ascending channel (6a) via the air channel inlet (9).
3. The novel hot blast stove burner according to claim 1, characterized in that, The air-gas mixing burner (7) is provided with five rows of nozzles, one above the other.
4. The novel hot blast stove burner according to claim 1, characterized in that, The gas inlet (2) and air inlet (4) are each provided in twos, and are respectively provided opposite each other on the same horizontal line of the burner body (1).
5. The novel hot blast stove burner according to claim 1, characterized in that, The air rising channel (6a) and the gas falling channel (6b) are respectively connected to the V-shaped air branch pipe and the V-shaped gas branch pipe. The V-shaped air branch pipe, the V-shaped gas branch pipe and the several exhaust gas mixing burners (7) are arranged in several rows on the same plane.
6. A novel hot blast stove burner, comprising a burner body, characterized in that, The burner body (1) is composed of an arch. A gas inlet (2) is provided on the upper outer wall of the arch. A gas distribution chamber (3) is provided in the arch wall corresponding to the gas inlet (2). An air inlet (4) is provided on the lower outer wall of the arch. An air distribution chamber (5) is provided in the arch wall corresponding to the air inlet (4). An air rising channel (6a) and a gas falling channel (6b) are provided in the arch wall inside the gas distribution chamber (3) and the air distribution chamber (5). The air rising channel (6a) and the gas falling channel (6b) are connected to a row of air-gas mixing burners (7) provided along the inner wall of the burner body (1). A hot air outlet (10) is also provided at the top of the burner body (1).
7. The novel hot blast stove burner according to claim 6, characterized in that, The gas distribution chamber (3) is connected to the gas descending channel (6b) via the gas channel inlet (8), and the air distribution chamber (5) is connected to the air ascending channel (6a) via the air channel inlet (9).
8. The novel hot blast stove burner according to claim 6, characterized in that, The air rising channel (6a) and the gas falling channel (6b) are respectively connected to the V-shaped air branch pipe and the V-shaped gas branch pipe. The V-shaped air branch pipe, the V-shaped gas branch pipe and the air-gas mixing burner (7) are set on the same plane.
9. The novel hot blast stove burner according to claim 6, characterized in that, The air-gas mixing burner (7) is a nozzle with a 30-60° tangential angle to the central axis of the burner body.