Combustion head and burner

Abstract

The present invention belongs to the field of thermal energy devices, specifically a combustion head and a burner. In the combustion head structure of the present invention, a swirl disk is provided at the head of the air inlet pipe, and the air is rotated at a high speed by passing through the swirl disk. The gas is sprayed in at a relatively fast speed from the gas nozzles on the circumference of the gas pipe and fully mixed with the rotating air; part of the air enters the combustion chamber through the ventilation holes on the combustion tube to participate in the mixing, and then the gas is fully burned with the assistance of the air entering from the burnout air port and the downstream heat storage body (refractory heat storage material), so as to shorten the flame length. The heat storage mixing hood is made of materials with fire resistance and heat storage capacity, and the flame is flattened by using a long and flat flame outlet. The present invention can be used in a combustion environment with a relatively narrow space such as a vertical furnace, and the gas can be stably and fully burned.

Description

Technical Field

[0001] The invention belongs to the field of thermal energy devices, in particular to a combustion head and a burner. Background Art

[0002] In the production of oil fields, many well sites and stations are small or have special requirements for space layout, so small vertical furnaces are used. However, the flame of ordinary gas burners is long, and when used in vertical furnaces, it will burn the heating furnace wall and cause damage to the furnace wall. The combustion head is an important part of the burner. The flame of ordinary combustion heads is long after burning, and the combustion is not complete. Summary of the invention

[0003] In order to solve the problems in the above-mentioned background technology, the present invention provides a combustion head and a burner, which can shorten the combustion flame and ensure complete combustion of the gas without affecting other performances of the burner.

[0004] The first object of the present invention is to provide a burner head, comprising a gas pipe, an air inlet pipe, a combustion barrel, a swirl disk and a heat storage air mixing hood, wherein a blind plate is fixedly provided at the end of the gas pipe, gas spray holes are uniformly distributed circumferentially at positions adjacent to the blind plate on the gas pipe, ignition spray holes for igniting gas are provided at positions adjacent to the gas spray holes on the gas pipe, and the ignition spray holes and the blind plate are respectively located on both sides of the gas spray holes; the swirl disk is fixedly sleeved on the gas pipe and is located between the gas spray holes and the ignition spray holes, a plurality of swirl air holes are circumferentially provided on the swirl disk, and a swirl plate is provided on each swirl air hole; the combustion barrel has a first open end and a second open end, the first open end is fixed on the swirl disk, and the second open end is away from the gas pipe, and a plurality of ventilation groups in a circumferential array are provided on the combustion barrel, and each ventilation group includes a plurality of ventilation holes arranged axially along the combustion barrel; the air inlet pipe is sleeved on the outside of the gas pipe and is coaxially arranged with the gas pipe, the heat storage air mixing hood is connected to the air inlet pipe, the combustion barrel is located in the air inlet pipe, and the inner diameter of the air inlet pipe is larger than the outer diameter of the combustion barrel.

[0005] Preferably, the heat storage air mixing hood is connected to the air inlet pipe through a connecting sleeve, the combustion tube is located in the connecting sleeve, and the inner diameter of the connecting sleeve is larger than the outer diameter of the combustion tube.

[0006] Furthermore, the combustion tube has a conical structure, the diameter of the first opening end is smaller than the diameter of the second opening end, and the angle between the generatrix of the combustion tube and the axis is 10°-15°.

[0007] Furthermore, the heat storage mixing air hood is a cylindrical structure with a square end and a round end. The round end is fixedly connected to one end of the connecting sleeve. The square end has a long side and a short side. The long side is connected to the round end to form an expanded diameter section, and the short side is connected to the round end to form a reduced diameter section.

[0008] Furthermore, the heat storage air mixing hood is made of fire-resistant and heat storage materials.

[0009] Furthermore, swirl holes are evenly distributed along the circumference of the swirl disk, and a swirl plate is provided on one side of the swirl hole parallel to the axis of the swirl disk. The swirl plate is located on one side of the combustion tube, and the swirl plate is 30°-35° with the plane of the swirl hole.

[0010] Furthermore, a burnout air port is formed between the combustion tube and the connecting sleeve, and the air flow areas of the swirl air hole, the ventilation hole and the burnout air port are 3:4:3.

[0011] Furthermore, it also includes an ignition device, which is located between the air inlet pipe and the gas pipe, and the ignition head of the ignition device is located above the ignition nozzle.

[0012] The second object of the present invention is to provide a burner comprising any one of the above-mentioned combustion heads.

[0013] Furthermore, it also includes a fan, a damper, a proportional adjustment mechanism, a gas butterfly valve, a servo motor, and an electric control box. The damper is rotatably connected to the damper shaft. A first rocker arm is installed at one end of the damper shaft. The first rocker arm is connected to the proportional adjustment structure through a connecting rod. The proportional adjustment mechanism is connected to the gas butterfly valve, the gas butterfly valve is connected to the solenoid valve group, and the servo motor is electrically connected to the electric control box and the fan respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The burner head of the present invention is provided with a swirl disk, a combustion tube and a heat storage air mixing hood. An appropriate amount of air is rotated by the swirl disk and quickly mixed with the gas ejected through the gas nozzle. In addition, part of the air enters the combustion chamber through the ventilation holes on the combustion tube to participate in the mixing. Furthermore, a burnout air port is formed between the connecting sleeve and the combustion tube, and part of the air enters through the burnout air port. The triple air distribution and the gas are fully mixed to enhance the mixing effect and ensure the full combustion of the gas.

[0016] (2) The heat storage air mixing hood of the present invention is a cylindrical structure, having a square end and a round end, the round end is fixedly connected to one end of the connecting sleeve, the square end has a long side and a short side, the long side is connected to the round end to form an expanded diameter section, and the short side is connected to the round end to form a reduced diameter section. The design of this structure can shorten the length of the flame, and the unburned mixed gas impacts the reduced diameter section of the heat storage air mixing hood, resulting in upper and lower impact of the gas, accelerating the mixing, and further improving the mixing effect; in addition, the heat storage air mixing hood is made of a material with fire resistance and strong heat storage capacity, and the burnout effect is better.

[0017] (3) A burnout air port is formed between the combustion tube and the connecting sleeve of the present invention, and the air flow areas of the swirl air hole, the ventilation hole and the burnout air port are 3:4:3, which can ensure that the gas is burned in the heat storage mixing hood or near its outlet, so that the flame length is further shortened. In addition, the setting of this ratio can ensure that the carbon monoxide emission in the combustion exhaust gas is less than 30ppm.

[0018] (4) The damper of the burner of the present invention is rotatably connected to the damper shaft, a rocker arm is installed at one end of the damper shaft, the rocker arm is connected to the proportional adjustment structure through a connecting rod, the proportional adjustment mechanism is connected to the gas butterfly valve, the gas butterfly valve is connected to the solenoid valve group, and the servo motor is electrically connected to the electric control box and the fan respectively, so that automatic adjustment of the damper can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is the appearance structure diagram of the burner head of the present invention;

[0021] Figure 2 It is a cross-sectional view of the burner head of the present invention perpendicular to the long side of the square end;

[0022] Figure 3 It is a cross-sectional view of the burner head of the present invention perpendicular to the short side of the square end;

[0023] Figure 4 This is a structural diagram of the swirl disk of the present invention;

[0024] Figure 5 This is a structural diagram of the combustion tube of the present invention;

[0025] Figure 6 This is a gas flow diagram in the combustion head of the present invention;

[0026] Figure 7 The burner structure of the present invention Figure 1 ;

[0027] Figure 8 The burner structure of the present invention Figure 2 ;

[0028] Among them, 1-gas pipe, 101-blind plate, 102-gas spray hole, 103-ignition spray hole, 2-air inlet pipe, 3-swirl disk, 301-swirl plate, 302-swirl air hole, 4-combustion tube, 401-first opening end, 402-second opening end, 403-ventilation hole, 404-burnout air outlet, 5-heat storage mixing air hood, 501-round end, 502-square end, 5021-long side, 5022-short side, 503-expanded diameter section, 504-reduced diameter section, 6-connecting sleeve, 7-ignition device, 8-fan, 81-throttle shaft, 9-first rocker arm, 10-connecting rod, 11-second rocker arm, 12-proportional adjustment mechanism, 13-crank, 14-gas butterfly valve, 15-solenoid valve group, 16-servo motor, 17-electric control box. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0030] like Figures 1 to 6As shown, the present invention provides a burner head, including a gas pipe 1, an air inlet pipe 2, a combustion tube 4, a swirl disk 3 and a heat storage air mixing hood 5, wherein a blind plate 101 is fixedly arranged at one end of the gas pipe 1, and the blind plate 101 blocks the end opening of the gas pipe 1, so that the gas cannot enter the combustion tube 4 through the end opening of the gas pipe 1, and the gas pipe 1 is in a cylindrical structure, and a circle of gas spray holes 102 are uniformly distributed circumferentially at a position adjacent to the blind plate 101 on the gas pipe 1, and the gas can be quickly sprayed out from the gas spray holes 102 into the combustion tube 4, and an ignition spray hole 103 for igniting the gas is arranged at a position adjacent to the gas spray hole 102 and away from the blind plate 101 on the gas pipe 1, and the number of the ignition spray holes 103 can ensure that the gas can be ignited, and this embodiment is not specifically limited. It can be understood that the ignition spray hole 103 and the blind plate 101 are respectively located on both sides of the gas spray hole 102; the swirl disk 3 has a hole in the center, and the hole diameter is the same as the gas spray hole 102. The outer diameters of the gas pipe 1 are the same so that the swirl disk 3 is fixedly mounted on the gas pipe 1, the swirl disk 3 is mounted between the gas spray hole 102 and the ignition spray hole 103, and the combustion tube 4 is fixedly arranged on the swirl disk 3 so that the ignition spray hole 103 is located outside the combustion tube 4, and the gas spray hole 102 is located inside the combustion tube 4; specifically, the combustion tube 4 of this embodiment has a first open end 401 and a second open end 402, the first open end 401 is fixed on the outer edge of the swirl disk 3, and the second open end 402 is away from the gas pipe 1, so that the sprayed gas has a certain combustion space, and the combustion tube 4 is coaxially arranged with the gas pipe 1, and a plurality of ventilation groups in a circular array are provided on the combustion tube 4, each ventilation group includes a plurality of ventilation holes 403 arranged along the axial direction of the combustion tube 4, and the present embodiment adopts a plurality of small spray holes to send a fine airflow into the combustion tube 4 to participate in combustion, which can enhance the mixing effect and accelerate the combustion of the gas.

[0031] Specifically, the air inlet pipe 2 is sleeved on the outside of the gas pipe 1 and is coaxially arranged with the gas pipe 1. The air flows in the annular space between the gas pipe 1 and the air inlet pipe 2, and finally enters the combustion tube 4 to participate in combustion. The heat storage mixing air hood 5 is connected to the air inlet pipe 2 through the connecting sleeve 6. The combustion tube 4 is located in the connecting sleeve 6, and the inner diameter of the connecting sleeve 6 is larger than the outer diameter of the combustion tube 4. In this way, a burnout air port 404 is formed between the combustion tube 4 and the connecting sleeve 6, and air can enter the heat storage mixing air hood 5 from the burnout air port 404 to participate in combustion. The connecting sleeve 6 of this embodiment can be a part of the air inlet pipe 2 and be integrally arranged with the air inlet pipe 2; it can also be separately arranged from the air inlet pipe 2 and sealed and connected to the air inlet pipe 2 through a flange. Those skilled in the art can make a choice according to the specific circumstances.

[0032] Specifically, Figure 5As shown, the combustion tube 4 has a conical structure, and the diameter of the first open end 401 is smaller than the diameter of the second open end 402, that is, the combustion tube 4 extends in an expanded form in the direction away from the gas pipe 1, and the angle between the generatrix of the combustion tube 4 and the axis is 10°-15°. In addition, the axis of the ventilation hole 403 on the combustion tube 4 is perpendicular to the generatrix of the combustion tube 4, so that an appropriate amount of air enters the combustion tube 4 at a certain inclination angle to mix with the gas, and the mixing area is increased. Compared with the case where the air enters the combustion tube 4 vertically, the mixing effect of air and gas is better and the combustion is more complete.

[0033] Specifically, Figure 2 and Figure 3 As shown, the heat storage air mixing hood 5 is a cylindrical structure, having a square end 502 and a round end 501, the round end 501 is fixedly connected to one end of the connecting sleeve 6, and the heat storage air mixing hood 5 is connected to the combustion tube 4 to form an extended combustion space, so that the gas and air have more sufficient combustion time, combustion space and mixing space. In addition, the square end 502 of the heat storage air mixing hood 5 has a long side 5021 and a short side 5022, and the long side 5021 is connected to a part of the round end to form an expanded diameter section 503. The short side 5022 is connected to the remaining circular end to form a reduced diameter section 504. The symmetrically arranged expanded diameter section 503 and reduced diameter section 504 make the flame flat in the heat storage air mixing hood 5, and the unburned gas is confronted with each other up and down at the reduced diameter section 504 of the heat storage air mixing hood. By changing the direction of the airflow, the unburned gas and the air coming in through the burnout air port are further accelerated to mix, and the mixing effect is better. Finally, the combustion flame is plasticized into a flat fan-shaped flame, shortening the length of the flame.

[0034] Specifically, the heat storage air mixing hood 5 is made of fire-resistant and heat storage materials. The incompletely burned mixed gas can be further accelerated to burn in the heat storage air mixing hood 5. The present invention can be applied to a combustion environment with a narrow space such as a vertical furnace, and the fuel gas can burn stably and fully.

[0035] Specifically, Figure 4As shown, swirl holes 302 are evenly distributed along the circumference of the swirl disk 3, and the swirl holes 302 are rectangular. Several swirl holes 302 are arranged along the circumference of the swirl disk 3, and each swirl hole 302 is provided with a swirl plate 301. The size of the swirl hole 302 is the same as that of the swirl plate 301. The swirl plate 301 is horizontally placed on the swirl hole 302 to completely cover the swirl hole 302. The long side of the swirl plate 301 is fixed to the long side of the swirl hole 302, and the swirl plate 301 is bent upward at a certain angle along the long side, so that the swirl plate 301 covers a part of the opening of the swirl hole 302, so that the air enters the combustion tube 4 at a certain angle, and the swirl plate 301 is located on one side of the combustion tube 4, and the swirl plate 301 and the plane of the swirl hole 302 are 30°-35° (that is, the swirl plate 301 is bent upward along the long side The angle is 30°-35°), an appropriate amount of air enters the combustion tube 4 through the swirl air hole 302, the air passing through the swirl plate 301 rotates at high speed and changes the direction of the airflow, and first mixes and burns quickly with the gas ejected from the gas nozzle 102, and the unburned gas here continues to move forward and mixes and burns with the air entering through the ventilation hole 403 on the combustion tube 4, further improving the mixing and combustion effects; in addition, the incompletely burned gas in the combustion tube 4 enters the heat storage mixing air hood 5, and an appropriate amount of air enters the heat storage mixing air hood 5 through the burnout air port 404 to further mix with the unburned gas, and participate in combustion, so that the combustion effect is better. The present invention fully mixes the gas with the triple air distribution to ensure more complete combustion of the gas, and flattens the combustion flame and shortens the flame length through the specially structured heat storage mixing air hood 5.

[0036] Specifically, the air flow areas of the swirl air holes 302, the ventilation holes 403 and the burnout air ports 404 are 3:4:3. This ratio is set to ensure that the carbon monoxide emission in the combustion exhaust gas is lower than 30ppm and the oxygen content is controlled below 3.5%. Experiments have determined that this air distribution ratio has a better effect.

[0037] Specifically, the present embodiment further comprises an ignition device 7, which is located in the annular space between the air inlet pipe 2 and the gas pipe 1, and an ignition head of the ignition device 7 is located above the ignition nozzle 103 for starting ignition.

[0038] like Figure 6The figure is a schematic diagram of the gas flow in the combustion head of the present invention. It can be seen that the ignition device 7 ignites the gas at the ignition nozzle 103, and a large amount of gas is ejected at a high speed from the gas nozzle 102 to first mix and burn with the air entering through the swirl disk 3. Part of the air enters the combustion tube 4 from the ventilation hole 403 in the combustion tube 4, and the air inlet direction of the ventilation hole 403 is inclined at a certain angle. At this time, the mixing of the gas and the air is relatively gentle, the impact force is relatively reduced, and the mixing is more complete. The mixed gas continues to burn in the combustion tube 4 and moves forward to enter the heat storage mixing hood 5. Part of the air enters the heat storage mixing hood 5 from the burnout air port 404. Due to the existence of the reduced diameter section 504, the air entering from the burnout air port 404 impacts up and down on the inner wall of the reduced diameter section 504, so that the air changes direction and turns back to further mix with the unburned gas, and the combustion effect is further improved. Compared with a single-weight air distribution system or a double-weight air distribution system, the combustion is more complete.

[0039] like Figure 7 and Figure 8 As shown, the present invention also provides a burner, comprising any one of the above-mentioned combustion heads.

[0040] Specifically, the burner further includes a fan 8, a damper 81, a proportional adjustment mechanism 12, a gas butterfly valve 14, a servo motor 16, and an electric control box 17, wherein the air inlet of the combustion head air inlet pipe 2 is connected to the air outlet of the fan 8, an air inlet is arranged below the fan 8, a damper (not shown in the figure) and a damper shaft 81 are arranged at the air inlet, the damper is rotatably connected to the damper shaft 81, a first rocker arm 9 is installed at one end of the damper shaft 81 located outside the fan 8, and the first rocker arm 9 is connected to the proportional adjustment mechanism 12 through a connecting rod 10. The proportional adjustment mechanism 12 of this embodiment is provided at the bottom of the fan 8. The regulating mechanism 12 is an adjustable cam mechanism, on which a second rocker arm 11 and a crank 13 are installed. The adjustable cam mechanism is connected to the connecting rod 10 through the second rocker arm 11, and is connected to the gas butterfly valve 14 through the crank 13. The gas butterfly valve 14 is connected to the solenoid valve group 15, and the servo motor 16 is electrically connected to the electric control box 17 and the fan 8 respectively. In this embodiment, automatic adjustment of the damper is achieved by adjusting the adjustable cam mechanism. The damper adjustment principle of the present invention belongs to the prior art, and those skilled in the art can understand the damper adjustment principle through the prior art.

[0041] It should be pointed out that “outside”, “inside”, “first”, “second”, etc. are just for the convenience of description and should not be understood as limiting the essential content of the present invention.

[0042] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A combustion head, characterized in that: It includes a gas pipe, an air inlet pipe, a combustion tube, a swirl disk and a heat storage air mixing hood, among which: A blind plate is fixedly arranged at one end of the gas pipe, gas spray holes are evenly distributed circumferentially at positions adjacent to the blind plate on the gas pipe, ignition spray holes for igniting gas are arranged at positions adjacent to the gas spray holes on the gas pipe, and the ignition spray holes and the blind plate are respectively located on both sides of the gas spray hole; The swirl disk is fixedly sleeved on the gas pipe and is located between the gas spray hole and the ignition spray hole. The swirl disk is provided with a plurality of swirl air holes in a circumferential direction, and each of the swirl air holes is provided with a swirl plate; The combustion tube has a first open end and a second open end, the first open end is fixed on the swirl disk, and the second open end is away from the gas pipe. The combustion tube is provided with a plurality of ventilation groups in a circumferential array, and each of the ventilation groups includes a plurality of ventilation holes arranged along the axial direction of the combustion tube; The air inlet pipe is sleeved on the outside of the gas pipe and is coaxially arranged with the gas pipe. The heat storage air mixing cover is connected to the air inlet pipe. The combustion tube is located in the air inlet pipe. The inner diameter of the air inlet pipe is larger than the outer diameter of the combustion tube. The heat storage air mixing hood is connected to the air inlet pipe through a connecting sleeve, the combustion tube is located in the connecting sleeve, and the inner diameter of the connecting sleeve is larger than the outer diameter of the combustion tube; The heat storage air mixing hood is made of fire-resistant and heat storage materials.

2. The burner head according to claim 1, characterized in that The combustion tube has a conical structure, the diameter of the first opening end is smaller than the diameter of the second opening end, and the angle between the generatrix of the combustion tube and the axis is 10°-15°.

3. The burner head according to claim 1, characterized in that The heat storage air mixing hood is a cylindrical structure, having a square end and a round end, the round end is fixedly connected to one end of the connecting sleeve, the square end has a long side and a short side, the long side is connected to the round end to form an expanded diameter section, and the short side is connected to the round end to form a reduced diameter section.

4. The burner head according to claim 1, characterized in that The swirl holes are evenly distributed along the circumference of the swirl disk. The swirl plate is provided on one side of the swirl hole parallel to the axis of the swirl disk. The swirl plate is located on one side of the combustion tube, and the swirl plate is at 30°-35° with the plane of the swirl hole.

5. The burner head according to claim 4, characterized in that A burnout air port is formed between the combustion tube and the connecting sleeve, and the air flow areas of the swirl air hole, the ventilation hole and the burnout air port are 3:4:

3.

6. The burner head according to any one of claims 1 to 5, characterized in that: It also includes an ignition device, which is located between the air inlet pipe and the gas pipe, and an ignition head of the ignition device is located above the ignition nozzle.

7. A burner, characterized in that: Comprising a burner head as claimed in any one of claims 1 to 6.

8. The burner according to claim 7, characterized in that It also includes a fan, a damper, a proportional adjustment mechanism, a gas butterfly valve, a servo motor, and an electric control box. The damper is rotatably connected to the damper shaft, a first rocker arm is installed at one end of the damper shaft, the first rocker arm is connected to the proportional adjustment structure through a connecting rod, the proportional adjustment mechanism is connected to the gas butterfly valve, the gas butterfly valve is connected to the solenoid valve group, and the servo motor is electrically connected to the electric control box and the fan respectively.

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