A low-calorific-value blast furnace gas composite burner

Abstract

This utility model discloses a low-calorific-value blast furnace gas composite burner, belonging to the field of industrial combustion equipment. It includes a mixing pipe, with a flame jet pipe fixedly connected to the side end of the mixing pipe. A flame jet nozzle is slidably connected to the outlet of the flame jet pipe. An air inlet pipe is fixedly connected to the outer wall of the mixing pipe. The inclined angle and staggered layout of the baffles force the airflow to continuously change its flow direction, forming complex vortices and turbulence to achieve better and more uniform mixing. After mixing through the mixing pipe, the uniform oxygen supply conditions required for the combustion of low-calorific-value gas are met, eliminating the hidden danger of uneven mixing for subsequent stable combustion. Low-calorific-value gas requires a larger combustion space; the trumpet-shaped structure of the flame jet nozzle can expand the flame diffusion range, making the low-calorific-value gas burn more completely and avoiding localized high temperatures or flame concentration. The heat insulation sleeve can effectively block the transfer of flame heat to the flame jet pipe, protecting the flame jet pipe from high-temperature damage and extending the service life of the components. The plug-in sliding connection facilitates disassembly and replacement.

Description

Technical Field

[0001] This utility model belongs to the field of industrial combustion equipment technology, specifically relating to a low-calorific-value blast furnace gas composite burner. Background Technology

[0002] Gas burners are widely used in various industrial furnaces that use gas as fuel. The structural design of gas burners is very important. A reasonable structure can ensure that air and gas are fully mixed inside the burner, and that the mixed gas is fully combusted, with good flame stability and no backfire or flameout.

[0003] Currently, conventional burners on the market generally have two major problems when burning low-calorific-value blast furnace gas: first, insufficient mixing of gas and air leads to low combustion efficiency and serious energy waste; second, the burners are inconvenient to install and adjust, making it difficult to adapt to the combustion needs under different operating conditions. Utility Model Content

[0004] The purpose of this invention is to provide a low-calorific-value blast furnace gas composite burner to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-calorific-value blast furnace gas composite burner, comprising a mixing pipe, a flame injector pipe fixedly connected to the side end of the mixing pipe, a flame injector nozzle slidably connected to the outlet of the flame injector pipe, an air inlet pipe fixedly connected to the outer wall of the mixing pipe, a gas inlet pipe fixedly connected to the end of the mixing pipe opposite to the flame injector pipe, and an installation bracket for supporting and adjusting the installation height fixedly connected to the lower part of the outer wall of the mixing pipe;

[0006] The mounting bracket includes a support base, a damping shaft, an internally threaded tube, a screw, a support rod, and a connecting plate. The top end of the internally threaded tube is fixedly connected to the damping shaft, and the internally threaded tube is rotatably connected to the support base through the damping shaft. The end of the internally threaded tube opposite to the damping shaft is connected to the screw through an internal thread. The bottom end of the screw is fixedly connected to one end of the support rod, and the other end of the support rod is fixedly connected to the connecting plate.

[0007] The mounting bracket breaks through the limitations of conventional fixed brackets, achieving dual adjustment of height and angle to adapt to different installation scenarios. The flame nozzle adopts a plug-in sliding connection, allowing selection of whether to use it based on processing requirements. It also facilitates timely replacement and repair in case of damage, without affecting production.

[0008] In a preferred embodiment, the flame nozzle is shaped like a trumpet with a small inner opening and a large outer opening. The flame nozzle consists of two parts: a heat insulation sleeve and a nozzle body, wherein the heat insulation sleeve is inserted into the flame tube.

[0009] Using the above scheme, low-calorific-value gas requires a larger combustion space. The trumpet-shaped structure can expand the flame diffusion range, making the low-calorific-value gas burn more completely, avoiding local high temperature or flame concentration. The heat insulation sleeve can effectively block the transfer of flame heat to the flame tube, protect the flame tube from high temperature damage, extend the service life of components, and the plug-in sliding connection facilitates disassembly and replacement.

[0010] In a preferred embodiment, the support base is provided with an inner arc-shaped groove and a mixing tube for fixed connection, and the internal threaded tube, screw and support rod are in the same vertical plane.

[0011] Using the above solution, the inner arc groove fits better with the outer wall of the mixing pipe, making it more secure than a flat connection and reducing vibration during equipment operation. The internal threaded pipe, screw, and support rod ensure that the force is transmitted vertically when adjusting the height, avoiding adjustment jamming or bracket deformation caused by component misalignment.

[0012] In a preferred embodiment, the side end of the connecting plate is provided with several annularly distributed internal thread grooves, and the connecting plate is provided with multiple irregularly shaped limiting grooves.

[0013] Using the above scheme, the annularly distributed threaded grooves can flexibly select the fixing point according to the bolt position on the mounting surface, avoiding the inability to fix due to bolt position deviation on the mounting surface. Multiple irregularly shaped limiting grooves can be used for a variety of complex installation conditions, improving the overall installation flexibility and stability.

[0014] In a preferred embodiment, the mixing tube includes a tube body and an arc-shaped baffle, wherein the arc-shaped baffle is fixedly connected to the inner wall of the tube body.

[0015] By adopting the above scheme, the arc-shaped baffle can change the flow path of the gas in the mixing tube, avoid the gas flowing directly in a straight line, and enhance the turbulence of the gas.

[0016] In a preferred embodiment, a plurality of staggered arc-shaped baffles with inclined angles are fixedly connected to the inner wall of the tube, and the plurality of arc-shaped baffles are spaced apart.

[0017] By adopting the above scheme, the staggered arrangement and tilt angle create vortices in the gas within the mixing pipe, extending the mixing time and improving the mixing uniformity. Maintaining the spacing can prevent excessive gas flow resistance and ensure the efficiency of gas and air transportation.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The tilt angle and staggered layout of the baffles force the airflow to constantly change its direction, forming complex vortices and turbulence to make the mixing more uniform. After mixing through the mixing tube, it meets the uniform oxygen supply conditions required for the combustion of low-calorific-value gas, eliminating the hidden danger of uneven mixing for subsequent stable combustion. Low-calorific-value gas requires a larger combustion space, and the trumpet-shaped structure of the flame nozzle can expand the flame diffusion range, making the low-calorific-value gas burn more completely and avoiding local high temperature or flame concentration. The heat insulation sleeve can effectively block the transfer of flame heat to the flame nozzle, protect the flame nozzle from high temperature damage, extend the service life of components, and the plug-in sliding connection makes disassembly and replacement convenient.

[0020] The mounting bracket features annularly distributed threaded grooves that allow for flexible selection of fixing points based on the bolt positions on the mounting surface, preventing fixation failures due to bolt position deviations. Multiple irregularly shaped limiting grooves cater to various complex installation conditions, enhancing overall installation flexibility and stability. The support height is adjustable via the combination of an internally threaded tube and a screw, while the orientation of the flame jet tube can be adjusted via a damping pivot to accommodate the furnace opening tilt angle, ensuring precise alignment of the flame jet tube with the furnace opening combustion zone. This design offers high flexibility and strong support stability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a low-calorific-value blast furnace gas composite burner proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention without the flame nozzle installed;

[0023] Figure 3 This is a schematic diagram of the mounting bracket structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the hybrid tube structure of this utility model.

[0025] In the diagram: 1. Flame nozzle; 2. Flame pipe; 3. Mixing pipe; 4. Air inlet pipe; 5. Gas inlet pipe; 6. Mounting bracket; 61. Support base; 62. Damping shaft; 63. Internally threaded pipe; 64. Screw; 65. Support rod; 66. Connecting plate; 31. Pipe body; 32. Arc-shaped baffle. Detailed Implementation

[0026] Please see Figure 1-4 This utility model provides a low-calorific-value blast furnace gas composite burner, including a mixing pipe 3, a flame jet pipe 2 fixedly connected to the side end of the mixing pipe 3, a flame jet nozzle 1 inserted and slidably connected to the outlet of the flame jet pipe 2, an air inlet pipe 4 fixedly connected to the outer wall of the mixing pipe 3, a gas inlet pipe 5 fixedly connected to the end of the mixing pipe 3 opposite to the flame jet pipe 2, and an installation bracket 6 fixedly connected to the lower part of the outer wall of the mixing pipe 3 for supporting and adjusting the installation height.

[0027] Mounting bracket 6 includes a support base 61, a damping shaft 62, an internally threaded tube 63, a screw 64, a support rod 65, and a connecting plate 66. The top end of the internally threaded tube 63 is fixedly connected to the damping shaft 62, and the internally threaded tube 63 is rotatably connected to the support base 61 through the damping shaft 62. The end of the internally threaded tube 63 opposite to the damping shaft 62 is connected to the screw 64 through an internal thread. The bottom end of the screw 64 is fixedly connected to one end of the support rod 65, and the other end of the support rod 65 is fixedly connected to the connecting plate 66.

[0028] Mounting bracket 6 breaks through the limitations of conventional fixed brackets, achieving dual adjustment of height and angle to adapt to different installation scenarios. The flame nozzle 1 adopts a plug-in sliding connection, which can be selected for use according to processing needs. At the same time, it facilitates timely replacement and repair in case of damage, without affecting production.

[0029] The flame nozzle 1 is shaped like a trumpet with a small inner opening and a large outer opening. The flame nozzle 1 consists of two parts: a heat insulation sleeve and a nozzle body. The heat insulation sleeve is inserted into the flame tube 2.

[0030] Low-calorific-value gas requires a larger combustion space. The trumpet-shaped structure can expand the flame diffusion range, making the low-calorific-value gas burn more completely and avoiding local high temperature or flame concentration. The heat insulation sleeve can effectively block the transfer of flame heat to the flame tube 2, protect the flame tube 2 from high temperature damage, extend the service life of the components, and the plug-in sliding connection makes it easy to disassemble and replace.

[0031] The support base 61 is provided with an inner arc groove and a fixed connection to the mixing pipe 3. The internal threaded pipe 63, the screw 64 and the support rod 65 are in the same vertical plane.

[0032] The inner arc groove fits the outer wall of the mixing pipe 3 more closely, making it more secure than a flat connection and reducing vibration during equipment operation. The internal threaded pipe 63, screw 64 and support rod 65 ensure that the force is transmitted vertically when adjusting the height, avoiding adjustment jamming or bracket deformation caused by component misalignment.

[0033] The connecting plate 66 has several annularly distributed internal thread grooves on its side end, and multiple irregularly shaped limiting grooves are also provided at the connecting plate 66.

[0034] The annularly distributed threaded grooves allow for flexible selection of fixing points based on the bolt positions on the mounting surface, preventing fixation failure due to bolt position deviations. Multiple irregularly shaped limiting grooves are suitable for various complex installation conditions, enhancing overall installation flexibility and stability.

[0035] The mixing tube 3 includes a tube body 31 and an arc-shaped baffle 32, wherein the arc-shaped baffle 32 is fixedly connected to the inner wall of the tube body 31;

[0036] The arc-shaped baffle 32 can change the flow path of the gas in the mixing tube 3, avoid the gas from flowing directly in a straight line, and enhance the turbulence of the gas.

[0037] Multiple staggered arc-shaped baffles 32 with inclined angles are fixedly connected to the inner wall of the tube body 31, and the multiple arc-shaped baffles 32 maintain a distance between each other;

[0038] The staggered arrangement and tilt angle create vortices in the gas within the mixing tube 3, extending the mixing time and improving the mixing uniformity. Maintaining the spacing prevents excessive gas flow resistance and ensures efficient delivery of gas and air.

[0039] During use, after determining the installation position of the nozzle, the bracket is fixed to the designated mounting surface of the combustion equipment through the annular internal thread groove and the irregular limiting groove of the connecting plate 66. The irregular limiting groove can first engage with the positioning block on the mounting surface to quickly calibrate the horizontal position of the burner and avoid installation misalignment. The bolts are tightened through the annularly distributed internal thread grooves to ensure that the mounting bracket 6 is firmly attached to the mounting surface and to prevent vibration displacement during equipment operation. Before installation and fixing, if it is necessary to adjust the height of the nozzle, rotate the screw 64 to move up and down along the inner wall of the internal thread tube 63 to achieve support height adjustment. The orientation of the flame tube 2 can be adjusted by the damping shaft 62 to adapt to the furnace opening tilt angle, so that the flame tube 2 is accurately aligned with the furnace opening combustion area. After the mounting bracket 6 is installed, the flange and bolts on the flame tube 2 are used for auxiliary support. After everything is correct, the installation and fixing work is completed, and the external low-calorific-value blast furnace gas is introduced. The gas inlet pipe 5 of the pipeline connects to the burner, and the external combustion air pipeline connects to the air inlet pipe 4. Then, depending on the combustion and processing requirements, it is selected whether to install the flame nozzle 1. The flame nozzle 1 can expand the flame diffusion range, so that the low-calorific-value gas can be burned more completely, avoiding local high temperature or flame concentration. At the same time, it provides a certain heat insulation protection for the flame nozzle 2. Then, the operation begins. The external low-calorific-value blast furnace gas enters the mixing pipe 3 through the gas inlet pipe 5, and the external combustion air enters the mixing pipe 3 through the air inlet pipe 4. They are mixed in the mixing pipe 3. The tilt angle and staggered layout of the baffles force the airflow to constantly change the flow direction, forming complex vortices and turbulence, which makes the mixing more uniform. After mixing in the mixing pipe 3, the uniform oxygen supply conditions required for the combustion of low-calorific-value gas are met, eliminating the hidden danger of uneven mixing for subsequent stable combustion. The uniformly mixed gas enters the flame nozzle 2 along the mixing pipe 3, and the combustion output is completed through the flame nozzle 2.

Claims

1. A low calorific value blast furnace gas composite burner, characterized by: Includes a mixing pipe (3), a flame pipe (2) is fixedly connected to the side end of the mixing pipe (3), a flame nozzle (1) is inserted and slidably connected to the outlet of the flame pipe (2), an air inlet pipe (4) is fixedly connected to the outer wall of the mixing pipe (3), a gas inlet pipe (5) is fixedly connected to the end of the mixing pipe (3) opposite to the flame pipe (2), and an installation bracket (6) for supporting and adjusting the installation height is fixedly connected to the lower part of the outer wall of the mixing pipe (3). The mounting bracket (6) includes a support base (61), a damping shaft (62), an internally threaded tube (63), a screw (64), a support rod (65), and a connecting plate (66). The top end of the internally threaded tube (63) is fixedly connected to the damping shaft (62), and the internally threaded tube (63) is rotatably connected to the support base (61) through the damping shaft (62). The end of the internally threaded tube (63) opposite to the damping shaft (62) is connected to the screw (64) through an internal wall thread. The bottom end of the screw (64) is fixedly connected to one end of the support rod (65), and the other end of the support rod (65) is fixedly connected to the connecting plate (66).

2. A low calorific value blast furnace gas composite burner as claimed in claim 1, wherein: The flame nozzle (1) is shaped like a trumpet with a small inner opening and a large outer opening. The flame nozzle (1) consists of two parts: a heat insulation sleeve and a nozzle body. The heat insulation sleeve is inserted into the flame tube (2).

3. The low calorific value blast furnace gas composite burner as claimed in claim 1, wherein: The support base (61) is provided with an inner arc groove and a mixing tube (3) for fixed connection. The internal threaded tube (63), the screw (64) and the support rod (65) are in the same vertical plane.

4. The low calorific value blast furnace gas composite burner as claimed in claim 1, wherein: The connecting disc (66) has several annularly distributed internal thread grooves on its side end, and multiple irregularly shaped limiting grooves are also provided at the connecting disc (66).

5. The low calorific value blast furnace gas composite burner as claimed in claim 1, wherein: The mixing tube (3) includes a tube body (31) and an arc-shaped baffle (32), wherein the arc-shaped baffle (32) is fixedly connected to the inner wall of the tube body (31).

6. A low calorific value blast furnace gas composite burner as claimed in claim 5, wherein: Multiple staggered arc-shaped baffles (32) with inclined angles are fixedly connected to the inner wall of the tube body (31), and the multiple arc-shaped baffles (32) maintain a distance between each other.

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