Furnace gas combustion device

Abstract

The application discloses a furnace gas combustion device, which comprises a combustion cover, a dust falling cover, a main gas pipe, a flow guide pipe, an arc-shaped sealing plate, a guide rod, a counterweight ball, an annular uniform distribution pipe and an air pipe. The dust falling cover is arranged on the top pipe opening of the main gas pipe. The combustion cover is arranged on the top of the dust falling cover. The flow guide pipe is arranged on the top opening of the dust falling cover in the inner cavity of the combustion cover. The arc-shaped sealing plate is arranged on the top pipe opening of the flow guide pipe in the inner cavity of the combustion cover. The guide rod is fixedly arranged on the top of the arc-shaped sealing plate. The counterweight ball is sleeved on the guide rod. The annular uniform distribution pipe is sleeved on the outer side of the pipe wall of the flow guide pipe in the inner cavity of the combustion cover. The air pipe is fixedly arranged on the outer wall of the combustion cover, and one end of the air pipe is communicated with the annular uniform distribution pipe. The device has the advantages of simple structure, convenient use, easy maintenance, solution to the problems of carbon deposition of various combustible furnace gases containing C elements, and instability of the furnace pressure and atmosphere of the heat treatment atmosphere furnace, and complete avoidance of residual carbon black in the combustion port, thereby ensuring smooth gas passage and stable furnace pressure.

Description

Technical fields:

[0001] This invention relates to a combustion device, and more particularly to a furnace gas combustion device. Background technology:

[0002] Firstly, for furnaces that do not require maintaining internal pressure, the combustion of combustible gas containing carbon will result in a large amount of carbon buildup at the outlet due to incomplete combustion, causing poor gas discharge and posing a safety hazard. Secondly, for some heat treatment atmosphere furnaces that require maintaining internal pressure, excessive carbon buildup will cause inconsistent outlet gaps, affecting the functionality of traditional pressure-holding devices, resulting in unstable furnace pressure and internal atmosphere, ultimately affecting product quality. Summary of the Invention:

[0003] The purpose of this invention is to provide a furnace gas combustion device for solving the problems of carbon buildup in various combustible furnace gases containing carbon and the problems of unstable furnace pressure and atmosphere in heat treatment atmosphere furnaces.

[0004] This invention is implemented by the following technical solution: a furnace gas combustion device, including a combustion hood, a dust settling hood, a main gas pipe, a connecting flange, an end cap, a guide pipe, fixing bolts, an arc-shaped sealing plate, a guide rod, a positioning frame, a counterweight ball, an annular distribution pipe, and an air pipe; the connecting flange is provided at the bottom opening of the vertically arranged main gas pipe, and the dust settling hood is provided at the top opening of the main gas pipe, with the top opening of the main gas pipe placed inside the dust settling hood; two carbon removal ports are symmetrically provided at the bottom of the dust settling hood on the outside of the main gas pipe, and the end cap is threadedly sealed to the carbon removal ports; the combustion hood is provided at the top of the dust settling hood, and the guide pipe is provided at the top opening of the dust settling hood inside the combustion hood, the guide pipe communicating with the inner cavity of the dust settling hood; in the... The top opening of the guide pipe in the inner cavity of the combustion hood is provided with an arc-shaped sealing plate with a sheet-like spherical surface; a guide rod is fixedly provided on the top of the arc-shaped sealing plate, and a positioning frame is provided on the inner wall of the combustion hood above the arc-shaped sealing plate. The guide rod and the positioning frame form a sliding guide engagement, and a counterweight ball is sleeved on the guide rod below the positioning frame; an annular uniform distribution pipe is sleeved on the outer wall of the guide pipe in the inner cavity of the combustion hood, and air nozzles are evenly distributed on the wall of the annular uniform distribution pipe, with the air nozzles facing the contact position between the guide pipe and the arc-shaped sealing plate; an air pipe is fixedly provided on the outer wall of the combustion hood, with one end of the air pipe passing through the outer wall of the combustion hood and communicating with the annular uniform distribution pipe.

[0005] Preferably, the dust settling hood is a can-shaped structure with an open top. The top opening of the dust settling hood is located inside the combustion hood cavity. The cavity between the side walls of the double-layer structure of the dust settling hood is vacuum-treated. The side walls of the dust settling hood are double-layered, with the inner wall being a cone shape that is smaller at the top and larger at the bottom. The diameter of the top opening of the dust settling hood is larger than the diameter of the inner hole of the top opening of the main air pipe.

[0006] Preferably, the top opening of the main air pipe has an outward-curved arc-shaped structure.

[0007] Preferably, the combustion hood has a canister structure that is wider at the bottom and narrower at the top.

[0008] Preferably, the contact area between the top opening of the guide pipe and the arc-shaped sealing plate is treated with a recessed arc shape.

[0009] Preferably, the guide rod and the positioning frame form a sliding guide engagement, the positioning frame is fixed on the combustion hood, and the combustion hood and the guide pipe are connected by fixing bolts.

[0010] Preferably, the counterweight ball is a radially perforated spherical assembly.

[0011] Preferably, the air pipe is wound around the combustion shroud once.

[0012] Preferably, an upper connecting flange is provided on the top of the dust settling hood, a guide pipe flange is provided on the side wall of the bottom inlet of the guide pipe, and a combustion hood flange is provided at the bottom of the outer wall of the combustion hood. The upper connecting flange, the guide pipe flange, and the combustion hood flange are fixedly connected into a whole by fixing bolts.

[0013] Advantages of this invention: Compared with the prior art, 1) This invention has a simple structure, is easy to use and maintain, and can solve the problems of carbon buildup in the combustion of various C-containing combustible furnace gases and the problems of unstable furnace pressure and atmosphere in heat treatment atmosphere furnaces; 2) This invention has a unique air purging structure, which can completely avoid residual carbon black at the combustion port, thereby ensuring smooth gas flow and stable furnace pressure.

[0014] 3) This invention cleverly utilizes the principle of vacuum insulation. Its unique dust settling structure with vacuum walls can effectively prevent the furnace gas from forming carbon black due to the temperature drop caused by contact with the inner wall, which eventually falls to the gas outlet and blocks the gas path; 4) The unique arc-shaped sealing plate and spherical counterweight of this invention can effectively prevent the sealing plate from getting stuck with the guide pipe opening and the uneven gap from causing no furnace pressure or unstable furnace pressure. Attached image description:

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention. Detailed implementation method:

[0016] Example: Figure 1As shown, the furnace gas combustion device includes a combustion hood 1, a dust settling hood 2, a main gas pipe 3, a connecting flange 4, a sealing head 5, a guide pipe 6, fixing bolts 7, an arc-shaped sealing plate 8, a guide rod 9, a positioning frame 10, a counterweight ball 11, an annular distribution pipe 12, and an air pipe 13. The combustion hood 1 has a canister-like structure that is wider at the bottom and narrower at the top, which serves to guide and concentrate the flame, preventing the flame from being blown out. The dust settling hood 2 has a canister-like structure with an open top and a double-layered side wall. The inner wall is conical, wider at the bottom and narrower at the top. The cavity 21 between the double-layered side walls of the dust settling hood 2 is vacuum-treated to provide heat insulation, thereby reducing carbon buildup on the inner wall of the dust settling hood 2. A connecting flange 4 is provided at the bottom of the vertically arranged main gas pipe 3, and a connecting flange 4 is provided at the top of the main gas pipe 3. The system includes a dust settling hood 2, with the top opening 31 of the main air pipe 3 located within the inner cavity of the dust settling hood 2. The top opening 31 of the main air pipe 3 has an outward-curving arc structure to prevent airflow accumulation in this area and reduce carbon buildup. Two carbon removal ports 22 are symmetrically located at the bottom of the dust settling hood 2 on the outside of the main air pipe 3 for easy cleaning and carbon powder removal. A sealing head 5 is threaded and sealed onto the carbon removal port 22. The top opening 23 of the dust settling hood 2 is larger than the top opening 31 of the main air pipe 3 to prevent carbon powder from falling into the top opening 31 and obstructing airflow. A combustion hood 1 is located at the top of the dust settling hood 2, with its top opening 23 located within the inner cavity of the combustion hood 1. A guide pipe 6 is located on the top opening 23 of the dust settling hood 2 within the inner cavity of the combustion hood 1, and the guide pipe 6 communicates with the inner cavity of the dust settling hood 2. The top of the hood 2 is provided with an upper connecting flange 24, the bottom of the guide pipe 6 is provided with a guide pipe flange 61, and the bottom of the outer wall of the combustion hood 1 is provided with a combustion hood flange 101. The upper connecting flange 24, the guide pipe flange 61, and the combustion hood flange 101 are fixedly connected as a whole by fixing bolts 7. The top opening of the guide pipe 6 in the inner cavity of the combustion hood 1 is provided with a sheet-like spherical arc-shaped sealing plate 8. The contact part between the top opening of the guide pipe 6 and the arc-shaped sealing plate 8 is grooved and arc-shaped to ensure that it fits completely with the lower end of the arc-shaped sealing plate 8. A guide rod 9 is fixedly provided on the top of the arc-shaped sealing plate 8. A positioning frame 10 is provided on the inner wall of the combustion hood 1 above the arc-shaped sealing plate 8. The guide rod 9 and the positioning frame 10 form a sliding guide fit to realize the guide rod 9 Vertical displacement; a counterweight ball 11 is fitted on the guide rod 9 below the positioning frame 10; the counterweight ball 11 plays the role of adjusting the airflow, and the air output can be adjusted by adjusting the number of counterweight balls 11; the counterweight ball 11 is a radially perforated spherical device, which makes its center of gravity more stable and can reduce the swaying of the whole connecting the arc-shaped sealing plate 8, the counterweight ball 11, and the guide rod 9; an annular uniform distribution pipe 12 is fitted on the outer side of the guide pipe 6 in the inner cavity of the combustion hood 1, and air nozzles 121 are evenly distributed on the pipe wall of the annular uniform distribution pipe 12, with the air nozzles 121 facing the contact position between the guide pipe 6 and the arc-shaped sealing plate 8; an air pipe 13 is fixed on the outer wall of the combustion hood 1, and one end of the air pipe 13 passes through the outer wall of the combustion hood 1 and is connected to the annular uniform distribution pipe.The air pipe 13 is wrapped around the combustion hood 1 to preheat the air. The preheated air reaches the contact position between the guide pipe 6 and the arc-shaped sealing plate 8 through the air nozzle 121, which plays the role of blowing away carbon deposits and promoting combustion, and avoids the formation of carbon deposits at the contact position between the two, which would lead to unstable airflow and thus cause unstable furnace pressure and furnace atmosphere.

[0017] Instructions for use:

[0018] The entire structure of this invention is connected to the dedicated exhaust port of the furnace body via connecting flange 4;

[0019] Furnace gas enters the inner cavity of dust settling hood 2 through main gas pipe 3. A vacuum chamber is provided between the inner and outer walls of dust settling hood 2. This structure can prevent furnace gas from contacting the inner wall of dust settling hood 2 and causing a temperature drop that would lead to the formation of carbon black. At the same time, two carbon cleaning ports 22 are symmetrically arranged at the lower part of dust settling hood 2 to clean carbon powder that has accumulated over a long period of use. During daily use, the carbon cleaning ports 22 are sealed with end caps 5 to prevent furnace gas from leaking out. The top opening 31 of main gas pipe 3 has an outward-curved arc structure and is smoothed during processing to prevent airflow from accumulating in this part and forming carbon deposits.

[0020] The dust settling hood 2, the guide pipe flange 61, and the combustion hood 1 are connected by fixing bolts 7. This split structure facilitates abnormal maintenance and easy disassembly.

[0021] The contact area between the top opening of the guide pipe 6 and the arc-shaped sealing plate 8 is grooved and arc-shaped to ensure that it fits completely with the lower end of the arc-shaped sealing plate 8. This can better ensure airtightness, consistent gaps, and more stable furnace pressure. The arc-shaped sealing plate 8, guide rod 9, and counterweight ball 11 are all made of heat-resistant steel. The positioning frame 10 is welded to the combustion hood 1. The center of the positioning frame 10 is provided with a positioning hole that matches the guide rod 9. Other parts of the positioning frame 10 are hollowed out to facilitate the discharge of furnace gas.

[0022] The furnace gas reaches the position of the arc-shaped sealing plate 8 through the guide pipe 6. The furnace pressure is adjusted by adjusting the number of counterweight balls 11. The center of gravity of the counterweight balls is stable, which can prevent the guide rod 9 from swaying back and forth and getting stuck with the positioning frame 10. When the furnace pressure is greater than the weight of the arc-shaped sealing plate 8 and the counterweight balls 11, the arc-shaped sealing plate 8 is lifted by the furnace gas. Since the furnace is constantly being filled with atmosphere, the furnace pressure and the weight of the arc-shaped sealing plate 8 and the counterweight balls 11 form a balance point, which can ensure that the furnace pressure is stable at a set value.

[0023] Air pipe 13 passes through the side wall of combustion hood 1 and the joint is fully welded to prevent air leakage. At the same time, it is coiled around the outside of the side wall of combustion hood 1 to preheat the air. There is an ignition device built into the furnace body at the outlet of combustion hood 1. When the furnace gas enters combustion hood 1 and reaches the outlet, it is ignited and ignites the furnace gas in the entire combustion hood 1. Several air outlets are evenly distributed around the air pipe 13 inside combustion hood 1. The hot air sprayed out mixes with the furnace gas sprayed out through the outlet of guide pipe 6 and burns. The air pipe 13 can avoid incomplete combustion of furnace gas due to the thin air in combustion hood 1, which would cause carbon black to form at the outlet of guide pipe 6. Since carbon black has relatively weak adhesion and strength, it will cause unevenness at the outlet of guide pipe 6, which will eventually cause the gap between the arc-shaped sealing plate 8 and the outlet of guide pipe 6 to be unstable, affecting the stability of furnace pressure.

Claims

1. A gas combustion device, characterized in that, The system includes a combustion hood, a dust settling hood, a main air pipe, a connecting flange, end caps, a guide pipe, fixing bolts, an arc-shaped sealing plate, a guide rod, a positioning frame, a counterweight ball, an annular distribution pipe, and an air pipe. The connecting flange is located at the bottom of the vertically arranged main air pipe, and the dust settling hood is located at the top of the main air pipe, with the top of the main air pipe positioned within the inner cavity of the dust settling hood. Two carbon removal ports are symmetrically located at the bottom of the dust settling hood on the outer side of the main air pipe, and end caps are threaded and sealed to these ports. The combustion hood is located at the top of the dust settling hood, and the guide pipe is located at the top opening of the dust settling hood within the combustion hood's inner cavity, communicating with the inner cavity of the dust settling hood. An arc-shaped sealing plate with a sheet-like spherical surface is located at the top opening of the guide pipe within the combustion hood's inner cavity. The guide rod is fixedly mounted on the top of the arc-shaped sealing plate, and the positioning frame is located on the inner wall of the combustion hood above the arc-shaped sealing plate. The guide rod and the positioning frame form a sliding guide engagement, and the counterweight ball is sleeved on the guide rod below the positioning frame; the annular uniform distribution tube is sleeved on the outer side of the guide tube in the inner cavity of the combustion hood, and air nozzles are evenly distributed on the tube wall of the annular uniform distribution tube, with the air nozzles facing the contact position between the guide tube and the arc-shaped sealing plate; the air pipe is fixed on the outer wall of the combustion hood, with one end of the air pipe passing through the outer wall of the combustion hood and communicating with the annular uniform distribution tube; the dust settling hood is a can-shaped structure with a top opening, the top opening of the dust settling hood is located in the inner cavity of the combustion hood, the cavity between the side walls of the double-layer structure of the dust settling hood is vacuum treated, the side walls of the dust settling hood are double-layered, the inner wall is a cone shape with a smaller top and a larger bottom, the diameter of the top opening of the dust settling hood is larger than the diameter of the inner hole of the top opening of the main air pipe; the top opening of the main air pipe has an outward arc-shaped structure.

2. The furnace gas combustion device according to claim 1, characterized in that, The combustion hood has a canister-like structure that is wider at the bottom and narrower at the top.

3. The furnace gas combustion device according to claim 1, characterized in that, The contact area between the top opening of the guide pipe and the arc-shaped sealing plate is grooved and arc-shaped.

4. The furnace gas combustion device according to claim 1, characterized in that, The guide rod and the positioning frame form a sliding guide engagement. The positioning frame is fixed on the combustion hood, and the combustion hood and the guide pipe are connected by fixing bolts.

5. The furnace gas combustion device according to claim 1, characterized in that, The counterweight ball is a radially perforated spherical assembly.

6. The furnace gas combustion device according to claim 1, characterized in that, The air pipe is wrapped around the combustion chamber once.

7. The furnace gas combustion device according to claim 1, characterized in that, An upper connecting flange is provided on the top of the dust settling hood, a guide pipe flange is provided on the side wall of the bottom pipe opening of the guide pipe, and a combustion hood flange is provided at the bottom of the outer wall of the combustion hood. The upper connecting flange, the guide pipe flange, and the combustion hood flange are fixedly connected into a whole by fixing bolts.

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