Burner with flue gas backflow function

Abstract

The utility model discloses a burner with a smoke backflow function, which belongs to the field of burners and comprises an air supply device and a fuel supply device, the air supply device is connected with the fuel supply device through a mixed ignition pipeline, and a smoke backflow device is arranged on one side of the mixed ignition pipeline. Compared with the prior art, the flue gas backflow device has the advantages that the closed area of the vent hole is changed by adjusting the adjustable closing plate, so that the backflow rate of the flue gas backflow device is changed, the flue gas backflow device adapts to the fuel gas backflow speed required by a combustor at the present stage, sufficient combustion of fuel gas is guaranteed, waste of the fuel gas is avoided, and the service life of the combustor is prolonged. And the environment is protected from being polluted by fuel gas.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of combustor, specifically point to a kind of combustor with smoke backflow function. BACKGROUND

[0002] In the existing industrial production, in order to heat raw materials to suitable temperature, such as steelmaking and pouring industry usually installs suitable combustor on the side of heating equipment, with the development of science and technology, combustor is gradually developed from original match and charcoal combustion to the most commonly used gas-liquid combustor at present stage.

[0003] The combustor at present stage transports air to mixed ignition pipeline by air supply device, then provides fuel gas by fuel supply device on the side of mixed ignition pipeline, after mixing the two according to certain proportion, uses electric spark or the like, ignites fuel gas, so that flame continuously heats heating area.

[0004] In the existing combustor structure, oxygen supply structure only has air supply device, flue gas after combustion will be directly mixed into atmosphere after passing the spout of mixed ignition pipeline, and there is no smoke backflow device behind mixed ignition pipeline, which not only reduces the oxygen utilization rate in flue gas, but also causes fuel gas pollution due to incomplete combustion of fuel gas provided by fuel supply device. SUMMARY

[0005] The technical problem to be solved by the utility model is that the existing mixed ignition pipeline rear end is not provided with smoke backflow device, the utilization of fuel gas cannot be maximized, and unburnt fuel gas pollutes air.

[0006] To solve the above technical problems, the technical scheme provided by the utility model is as follows: a combustor with smoke backflow function, comprising air supply device and fuel supply device, the air supply device is connected with the fuel supply device through mixed ignition pipeline, one side of the mixed ignition pipeline is provided with smoke backflow device, the smoke backflow device comprises a plurality of air holes with different sizes located on the side wall of the mixed ignition pipeline, adjustable closure plate closing the air holes, and closed pipeline guiding flue gas, the closed pipeline and the mixed ignition pipeline are provided with filter device, and the backflow outlet of the closed pipeline, the filter device and the backflow inlet of the mixed ignition pipeline are connected through high-temperature resistant pipeline.

[0007] As an improvement, one side of the adjustable closure plate is provided with a closure ring sleeved on the outer wall of the mixed ignition pipeline, one side of the closure ring is provided with an adjusting handle fixed on the outer wall of the closed pipeline, one side of the mixed ignition pipeline is provided with one-way fire blocking baffle, and the inside of the one-way fire blocking baffle is provided with a plurality of fire holes.

[0008] As improvement, the closed pipe and the outer wall of the mixed pilot pipe and the inner wall of the mixed pilot pipe and the one-way fireproof baffle are connected by welding, and the outer wall of the mixed pilot pipe and the inner wall of the closed pipe are connected with the closed ring by body contact.

[0009] As improvement, the air outlet of the fuel supply device penetrates the side wall of the mixed pilot pipe, and the air outlet of the fuel supply device is connected with the side hole of the mixed pilot pipe by welding.

[0010] As improvement, the air supply device comprises a single-opening air supply shell, an air supply wheel inside the single-opening air supply shell, and a driving motor driving the air supply wheel, the open end of the single-opening air supply shell is provided with a sealing plate, and the rotating shaft of the air supply wheel penetrates the sealing plate.

[0011] As improvement, the sealing plate is connected with the single-opening air supply shell by bolt structure, the output shaft of the driving motor is connected with the rotating shaft of the air supply wheel by connecting key, the driving motor and the fuel supply device are connected with the power supply by wires, and the mixed pilot pipe is connected with the air outlet of the single-opening air supply shell by screw thread.

[0012] The device adjusts the adjustable closed plate to change the closed area of the air hole, changes the backflow rate of the smoke backflow device, adapts to the required fuel gas backflow speed of the burner at the present stage, ensures that the fuel gas can be fully burned, avoids waste of fuel gas, and protects the environment from being polluted by fuel gas. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a total structure diagram of the burner with the smoke backflow function.

[0014] Figure 2 is an explosion diagram of the total structure of the burner with the smoke backflow function.

[0015] Figure 3 is a sectional view of the air supply device of the burner with the smoke backflow function.

[0016] Figure 4 is a sectional view of the smoke backflow device of the burner with the smoke backflow function.

[0017] Figure 5 is a structure diagram of the adjustable closed plate of the burner with the smoke backflow function.

[0018] As shown in the figure: 1, air supply device; 11, single open air supply shell; 12, air supply wheel; 13, drive motor; 14, sealing plate; 2, fuel supply device; 3, mixed pilot pipeline; 4, flue gas return device; 41, air hole; 42, adjustable closing plate; 421, closing ring; 422, adjusting handle; 423, fire baffle; 424, fire hole; 43, closing pipeline; 44, filtering device. DETAILED DESCRIPTION

[0019] The utility model will be made further detailed explanation in combination with the drawings.

[0020] As shown in the figure Figure 1 、 2 , 3, including air supply device 1 and fuel supply device 2, air supply device 1 is connected with fuel supply device 2 through mixed pilot pipeline 3, the air outlet of fuel supply device 2 passes through the lateral wall of mixed pilot pipeline 3, the air outlet of fuel supply device 2 is connected with the lateral hole of mixed pilot pipeline 3 through welding, mixed pilot pipeline 3 is connected with the air outlet of single open air supply shell 11 through screw thread, the oxygen required for the combustion of fuel supply device 2 is provided through the air inlet of air supply device 1, and the gas provided by fuel supply device 2 and the oxygen passed by air supply device 1 are mixed sufficiently in mixed pilot pipeline 3, so that they become inflammable gas; because the air outlet of fuel supply device 2 is welded with the lateral hole of mixed pilot pipeline 3 through electric welding device, the gas will not leak during transmission due to structural looseness.

[0021] Air supply device 1 includes single open air supply shell 11, air supply wheel 12 located in single open air supply shell 11 and drive motor 13 for driving air supply wheel 12, the open end of single open air supply shell 11 is provided with sealing plate 14, and the rotating shaft of air supply wheel 12 penetrates sealing plate 14. Sealing plate 14 is connected with single open air supply shell 11 through bolt structure, the output shaft of drive motor 13 is connected with the rotating shaft of air supply wheel 12 through connecting key, drive motor 13 and fuel supply device 2 are connected with power supply through wire, and current is connected on the side of drive motor 13 and fuel supply device 2 through wire. When starting is required, only power supply needs to be started, so that drive motor 13 drives air supply wheel 12 to rotate, thereby accelerating the air from the air inlet of single open air supply shell 11 into mixed pilot pipeline 3, ensuring the supply of oxygen, because single open air supply shell 11 is connected with sealing plate 14 through bolt structure, so that air supply device 1 is more convenient to disassemble when failure occurs.

[0022] As shown in the figure Figure 1 、 2, 4, 5, one side of the mixed pilot pipe 3 is provided with one-way fire baffle 423, the inside of one-way fire baffle 423 is equipped with several fire holes 424, the outer wall of closed pipe 43 and the inner wall of mixed pilot pipe 3 and one-way fire baffle 423 are all connected by welding, and one-way fire baffle 423 avoids the reverse flow of flame after gas combustion, so as to protect the safety of the internal structure of the burner.

[0023] One side of the mixed pilot pipe 3 is provided with the smoke backflow device 4, the smoke backflow device 4 includes several size different air holes 41 located on the side wall of the mixed pilot pipe 3, the adjustable closing plate 42 closing the air hole 41 and the closed pipe 43 guiding the smoke, the filter device 44 is arranged between the closed pipe 43 and the mixed pilot pipe 3, the backflow outlet of the closed pipe 43, the filter device 44 and the backflow inlet of the mixed pilot pipe 3 are all connected by high-temperature-resistant pipes, when the smoke after gas combustion enters the air hole 41 area of the mixed pilot pipe 3, the smoke enters the backflow outlet of the closed pipe 43 from the air hole 41 due to the impact force of the gas, and then the clean smoke is circulated into the mixing area of the mixed pilot pipe 3 after passing through the filter device 44, so as to reduce the escape rate of the gas and maximize the efficiency of the burner.

[0024] One side of the adjustable closing plate 42 is provided with the closing ring 421 sleeved on the outer wall of the mixed pilot pipe 3, one side of the closing ring 421 is provided with the adjusting handle 422 fixed on the outer wall of the closed pipe 43, and the outer wall of the mixed pilot pipe 3 and the inner wall of the closed pipe 43 are connected with the closing ring 421 through body contact, so that the smoke layer between the outer wall of the mixed pilot pipe 3 and the inner wall of the closed pipe 43 will not leak, and the sealing property is guaranteed, in order to guarantee the air permeability of the smoke layer, the air groove (the air groove and the air hole 41 are arranged in staggered positions) is arranged on the inner wall of the adjustable closing plate 42, the adjusting handle 422 rotates the adjustable closing plate 42, the closed air hole 41 is changed, the backflow rate of the smoke is adjusted, and the efficiency of the gas is maximized.

[0025] In the specific implementation of the utility model, the driving motor 13 and the fuel supply device 2 are started, after mixing for a period of time, the gas at the fire hole 424 is ignited by using electric spark, the adjusting handle 422 is rotated according to the flame condition of the gas spray, the air permeability of the air hole 41 is changed, the backflow rate of the smoke backflow device 4 is changed, when the flame reaches the best, the position of the adjusting handle 422 is fixed, and the combustion efficiency of the burner is maximized.

[0026] The above has described the utility model and its implementation mode, which is not restrictive, and the drawings only show one of the implementation modes of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are not creatively designed, which should belong to the protection scope of the utility model.

Claims

1. A burner with a flue gas reflow function, comprising an air supply device (1) and a fuel supply device (2), wherein the air supply device (1) is connected to the fuel supply device (2) via a mixing and ignition pipe (3), and is characterized in that: A smoke reflux device (4) is provided on one side of the mixing and ignition pipe (3), and the smoke reflux device (4) comprises a plurality of vent holes (41) of different sizes located on the side wall of the mixing and ignition pipe (3), an adjustable closing plate (42) for closing the vent holes (41), and a closed pipe (43) for guiding smoke, a filtering device (44) is provided between the closed pipe (43) and the mixing and ignition pipe (3), and the reflux outlet of the closed pipe (43), the filtering device (44) and the reflux inlet of the mixing and ignition pipe (3) are all connected through a high-temperature resistant pipe.

2. The burner with flue gas reflow function according to claim 1, characterized in that: A closed ring (421) is provided on one side of the adjustable closed plate (42) and is sleeved on the outer wall of the mixing and ignition pipe (3); an adjustment handle (422) is provided on one side of the closed ring (421) and is fixed on the outer wall of the closed pipe (43); a one-way fire-blocking baffle (423) is provided on one side of the mixing and ignition pipe (3); and a plurality of fire holes (424) are provided inside the one-way fire-blocking baffle (423).

3. The burner with flue gas reflow function according to claim 2, characterized in that: The closed pipe (43) and the outer wall of the mixing and ignition pipe (3), as well as the inner wall of the mixing and ignition pipe (3) and the one-way fire-blocking baffle (423) are all connected by welding, and the outer wall of the mixing and ignition pipe (3) and the inner wall of the closed pipe (43) are both connected to the closed ring (421) through body contact.

4. The burner with flue gas reflow function according to claim 1, characterized in that: The air outlet of the fuel supply device (2) passes through the side wall of the mixing and ignition pipe (3), and the air outlet of the fuel supply device (2) is connected to the side hole of the mixing and ignition pipe (3) by welding.

5. The burner with flue gas reflow function according to claim 1, characterized in that: The air supply device (1) comprises a single-open air supply shell (11), an air supply wheel (12) located inside the single-open air supply shell (11), and a drive motor (13) for driving the air supply wheel (12); a sealing plate (14) is provided at the open end of the single-open air supply shell (11), and a rotating shaft of the air supply wheel (12) passes through the sealing plate (14).

6. The burner with flue gas reflow function according to claim 5, characterized in that: The sealing plate (14) is connected to the single-open air supply shell (11) through a bolt structure, the output shaft of the driving motor (13) is connected to the rotating shaft of the air supply wheel (12) through a connecting key, the driving motor (13) and the fuel supply device (2) are both connected to the power supply through wires, and the mixing ignition pipe (3) is connected to the air outlet of the single-open air supply shell (11) through a thread.

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