Biogas burner

Abstract

The utility model relates to the technical field of biogas combustors, in particular to a biogas combustor which comprises a shell, a fire gathering cover is arranged at the left end of the shell, a guide pipe is arranged at the end, extending into the shell, of a biogas channel, a small fire channel is arranged at the right end, close to the top, of the shell, and a plurality of distribution branch pipes are arranged at the end of the guide pipe. A cooling air pipe is also arranged on the biogas channel; according to the biogas burner, the combustion-supporting air channel is formed in the shell, combustion-supporting air can enter the biogas burner conveniently, under the cooperation of the fire gathering cover, the influence of blowing of external air on ignition flames is reduced, under the cooperation of the small fire channel and the small stable combustion chamber, ignition cooperation of the ignition electrode is facilitated, and the cooling air pipe is matched with the biogas channel; meanwhile, air passes through the end of the guide pipe, the combustion-supporting effect is improved, two-stage grading in the axial direction and the radial direction is achieved, radial grading of the air inside and outside the fire gathering cover is achieved, the shape and rigidity of flames can be adjusted, and the stability of the flames is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of biogas burners, in particular to a biogas burner. Background Art

[0002] Biogas is the gas in swamp wetlands. In swamps, sewage ditches or manure pits, bubbles emerge. This is the natural biogas. Biogas is a combustible gas produced by the fermentation of various organic substances, which are isolated from the air and at a suitable temperature and pH value through the fermentation of microorganisms. Biogas is a secondary energy source and a renewable energy source. In the fermentation biogas treatment and utilization system, due to the mismatch between gas production and gas use, it is often necessary to set up incineration equipment to burn the excess gas in a centralized manner.

[0003] The utility model with the announcement number CN219328085U discloses a biogas burner, including an air inlet, a protective shell and an air outlet, the air inlet including a biogas air inlet and a combustion-supporting air inlet, both of which are arranged on one side of the sleeve end; the protective shell is a double-layer hollow structure, including an outer tube, a first inner tube and a second inner tube, the first inner tube and the second inner tube are both arranged inside the outer tube, a biogas pipeline is arranged inside the first inner tube, the second inner tube is arranged on one side of the air outlet, the second inner tube is fixedly connected to the outer tube by a baffle, and the inner wall of the second inner tube is connected to the first inner tube by a connector;

[0004] The above technical scheme is provided with a combustion-supporting air inlet, and a diversion device is provided at the position of the combustion-supporting air inlet, so as to adjust the amount of combustion-supporting gas according to the concentration of biogas, thereby ensuring that the biogas can not only be completely burned under the action of the combustion-supporting gas, but also the combustion temperature is increased, thereby reducing the generation of pollutants such as dioxins; however, in the combustion process of the fuel, the nitrogen oxides generated by the combustion are mainly NO and NO2, collectively referred to as NOx. NOx in the atmosphere is an important factor in causing acid rain and haze; the generation of oxides is closely related to temperature. The higher the temperature of the flame, the greater the generation of nitrogen oxides, and vice versa; existing biogas burners generally have the disadvantages of poor mixing effect of fuel and combustion-supporting agent, excessively high combustion temperature, local high temperature areas, and complex structure. Utility Model Content

[0005] The purpose of the utility model is to provide a biogas burner to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A biogas burner, comprising a housing, a fire gathering hood is provided at the left end of the housing, a biogas passage is provided at the middle of the right end of the housing, a conduit is provided at one end of the biogas passage extending into the interior of the housing, a small fire passage is provided near the top at the right end of the housing, the small fire passage penetrates through the housing and extends into the fire gathering hood, the end of the conduit extends into the fire gathering hood, and a plurality of distribution branch pipes are provided at the end of the conduit, distribution holes are opened at the ends of the distribution branch pipes, a plurality of spray holes are provided on the outer wall of the conduit near the end, a flame stabilizing disc is further sleeved on the outer wall of the conduit near the edge, a cooling air pipe is further provided on the biogas passage, and the cooling air pipe extends into the conduit.

[0008] Preferably, a combustion-supporting air passage communicating with the interior is provided near the middle of the outer wall of the housing, and the combustion-supporting air passage is fixedly welded to the housing.

[0009] In the present utility model, a combustion-supporting air passage is provided, and combustion-supporting air enters the air cavity from the combustion-supporting air passage, continuously providing air inside, which helps with combustion cooperation.

[0010] Preferably, a drain pipe communicating with the interior is further provided on the right end face of the housing, and the drain pipe is fixedly adhered to the housing.

[0011] In the present utility model, the setting of the drain pipe prevents the water vapor in the combustion-supporting air from condensing at a relatively low temperature, causing water accumulation inside the housing and affecting it.

[0012] Preferably, a plurality of jet holes are opened at the junction of the housing and the fire gathering hood, the jet holes are distributed at equal intervals in a ring shape, and the jet holes communicate the interior of the housing with the outer space.

[0013] In the present utility model, the setting of a plurality of jet holes helps the stable discharge of the combustion-supporting air inside the housing for cooperation, realizes the internal air circulation, helps to continuously provide combustion-supporting air, and the setting of the fire gathering hood reduces the influence of the outside wind on the ignited flame.

[0014] Preferably, the small fire passage is fixedly welded to the housing, the end of the small fire passage extends into the fire gathering hood, and a small flame stabilizing chamber is provided at the end.

[0015] In the present utility model, the ignition gas enters the interior of the burner through the small fire passage until the end of the fire gathering hood, and is ignited by the ignition electrode in the small flame stabilizing chamber at the end of the small fire passage, and the formed small fire flame is used to further ignite the main biogas flame.

[0016] Preferably, the end of the biogas passage is fixedly welded to the end of the conduit, a flow disturbing plate is sleeved in the middle of the outer wall of the conduit, the flow disturbing plate is fixedly adhered to the conduit, the conduit is fixedly welded to the housing, the distribution branch pipes are distributed at equal intervals in a ring shape, the interior of the distribution branch pipes communicates with the interior of the conduit, and the distribution branch pipes are fixedly welded to the conduit.

[0017] In the present utility model, a spoiler is provided. The combustion-supporting air enters the inside of the fire-gathering cover after passing through the spoiler, and then passes through the flame-stabilizing plate, and a low-speed zone of blunt-body recirculation with a weak swirl is formed behind the flame-stabilizing plate. In the recirculation zone, the combustion-supporting air is evenly mixed with the biogas from the distribution holes on the distribution branch pipe and the spray holes on the conduit, and after being ignited, it burns out quickly and sprays out of the fire-gathering cover.

[0018] Preferably, the spray holes are distributed at equal intervals in a ring shape, the flame-stabilizing plate is in a disc shape, and the flame-stabilizing plate is fixedly connected to the conduit by screws.

[0019] In the present utility model, with the cooperation of multiple spray holes, it is helpful to stably mix biogas. With the cooperation of the flame-stabilizing plate, a low-speed zone of blunt-body recirculation with a weak swirl is formed, which is helpful for combustion-supporting cooperation.

[0020] Preferably, the cooling air pipe and the biogas channel are of an integrally formed structure, and the cooling air pipe penetrates through the biogas channel and the conduit.

[0021] In the present utility model, the cooling air pipe is provided to cool the structure of the biogas burner nozzle in the form of axial jet, reducing the influence of high temperature during long-term use on the damage of the conduit and the end of the distribution branch pipe.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] 1. By providing a combustion-supporting air channel on the outer shell in the present utility model, it is helpful for the combustion-supporting air to enter the inside, and with the cooperation of the jet holes, the combustion-supporting air is continuously guided into the inside. With the cooperation of the fire-gathering cover, the influence of external wind on the ignited flame is reduced. With the cooperation of the small fire channel and the small stable combustion chamber, it is helpful for the ignition electrode to ignite. With the cooling air pipe on the biogas channel, it is helpful for ventilation and cooling of the end of the conduit. At the same time, the air passes through the end of the conduit, increasing the combustion-supporting effect. The two-stage grading in the axial and radial directions realizes the radial grading of air inside and outside the fire-gathering cover at the same time, which is beneficial to adjusting the flame shape and rigidity and enhancing the flame stability.

[0024] 2. By providing a drain pipe with a valve in the present utility model, it is helpful for timely discharging the condensed water of the combustion-supporting air inside the outer shell. Multiple distribution branch pipes with distribution holes increase the uniformity of the mixture of biogas and combustion-supporting air in the middle of the end of the conduit, and with the cooperation of the flame-stabilizing plate, it is helpful for stabilizing the flame root. The combined structure is simple and convenient for combined installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0026] Figure 2 is a schematic left view of the overall structure of the present utility model;

[0027] Figure 3 This is the schematic right view of the whole of the present utility model;

[0028] Figure 4 This is the schematic diagram of the structure of the present utility model with the fire gathering cover removed;

[0029] Figure 5 This is the schematic cross-sectional structure diagram of the whole of the present utility model.

[0030] The meanings of the various reference numerals in the figure are as follows:

[0031] 1. Outer shell; 10. Small fire channel; 100. Small stable combustion chamber; 11. Drain pipe; 12. Jet holes;

[0032] 2. Combustion-supporting air channel;

[0033] 3. Biogas channel; 30. Cooling air pipe;

[0034] 4. Fire gathering cover;

[0035] 5. Conduit; 50. Spray holes; 51. Flame stabilizing disc;

[0036] 6. Distribution branch pipe; 60. Distribution holes.

[0037] 7. Turbulence plate. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0039] Please refer to Figures 1-5 , this embodiment provides a technical solution:

[0040] A biogas burner includes an outer shell 1. A combustion-supporting air channel 2 communicating with the inside is provided on the outer wall of the outer shell 1 near the middle, and the combustion-supporting air channel 2 is fixedly welded to the outer shell 1.

[0041] In the present utility model, the combustion-supporting air channel 2 is provided, and combustion-supporting air enters the air cavity from the combustion-supporting air channel 2 to continuously provide air inside, which helps with combustion cooperation.

[0042] Furthermore, a drain pipe 11 communicating with the inside is also provided on the right end face of the outer shell 1, and the drain pipe 11 is fixedly adhered to the outer shell 1.

[0043] In the present utility model, the arrangement of the drain pipe 11 prevents the condensation of water vapor in the combustion-supporting air at a relatively low temperature, which may cause water accumulation inside the outer shell 1 and affect its performance.

[0044] Specifically, a plurality of jet holes 12 are formed at the junction of the outer shell 1 and the fire-gathering hood 4. The jet holes 12 are distributed at equal intervals in a circular shape and connect the interior of the outer shell 1 with the outer space.

[0045] In the present utility model, the provision of multiple jet holes 12 helps the stable discharge of the combustion-supporting air inside the outer shell 1, realizes the internal air circulation, and helps to continuously supply the combustion-supporting air. The setting of the fire-gathering hood 4 reduces the influence of the external wind on the ignited flame.

[0046] Among them, the diameter of the jet holes 12 is 20 - 40 mm, and the number is 10 - 20. Preferably, the diameter of the jet holes 12 is 30 mm and the number is 20, which accelerates the internal combustion-supporting air circulation and discharge cooperation and helps to stably carry out the combustion-supporting cooperation.

[0047] It should be noted that a fire-gathering hood 4 is provided at the left end of the outer shell 1, a biogas passage 3 is provided in the middle of the right end of the outer shell 1. A conduit 5 is provided at one end of the biogas passage 3 extending into the interior of the outer shell 1. A small fire passage 10 is provided near the top of the right end of the outer shell 1. The small fire passage 10 penetrates the outer shell 1 and extends into the fire-gathering hood 4. The small fire passage 10 is fixedly welded to the outer shell 1. The end of the small fire passage 10 extends into the fire-gathering hood 4 and a small stable combustion chamber 100 is provided at the end.

[0048] In the present utility model, the ignition gas enters the interior of the burner through the small fire passage 10 until the end of the fire-gathering hood 4 and is ignited by the ignition electrode in the small stable combustion chamber 100 at the end of the small fire passage 10. The formed small fire flame is used to further ignite the main biogas flame.

[0049] Furthermore, the end of the biogas passage 3 is fixedly welded to the end of the conduit 5. A spoiler 7 is sleeved in the middle of the outer wall of the conduit 5. The spoiler 7 is adhesively fixed to the conduit 5. The conduit 5 is fixedly welded to the outer shell 1. The distribution branch pipes 6 are distributed at equal intervals in a circular shape. The interior of the distribution branch pipes 6 is interconnected with the interior of the conduit 5. The distribution branch pipes 6 are fixedly welded to the conduit 5.

[0050] In the present utility model, with the spoiler 7 provided, the combustion-supporting air enters the interior of the fire-gathering hood 4 after passing through the spoiler 7. After passing through the flame-stabilizing disc 51, a weak swirling blunt-body recirculation low-speed zone is formed behind the flame-stabilizing disc 51. In the recirculation zone, the combustion-supporting air is evenly mixed with the biogas from the distribution holes 60 on the distribution branch pipes 6 and the spray holes 50 on the conduit 5, and is quickly burned out and ejected from the fire-gathering hood 4 after being ignited.

[0051] Among them, the diameter of the distribution hole 60 is 10 - 30 mm, and the number of distribution branch pipes 6 is 8 - 16. In this article, it is preferably that the diameter of the distribution hole 60 is 15 mm and the number of distribution branch pipes 6 is 10, which helps to evenly carry out the combustion-supporting cooperation. The angle of the swirl vane in the flame stabilizing disc 51 is 15° - 45°. In this article, it is preferably that the angle of the swirl vane in the flame stabilizing disc 51 is 30°, which is beneficial to adjusting the flame shape and rigidity.

[0052] It is worth adding that the end of the conduit 5 extends into the flame gathering hood 4, and a number of distribution branch pipes 6 are provided on the end of the conduit 5. Distribution holes 60 are opened at the ends of the distribution branch pipes 6. A number of spray holes 50 are provided on the outer wall of the conduit 5 near the end. A flame stabilizing disc 51 is also sleeved on the outer wall of the conduit 5 near the edge. A cooling air pipe 30 is also provided on the biogas passage 3, and the cooling air pipe 30 extends into the conduit 5.

[0053] Secondly, the diameter of the spray hole 50 is 5 - 20 mm. In this article, it is preferably that the diameter of the spray hole 50 is 15 mm, which helps to carry out the combustion-supporting cooperation.

[0054] Furthermore, the spray holes 50 are distributed at equal intervals in a ring shape. The flame stabilizing disc 51 is in a disc shape, and the flame stabilizing disc 51 is fixedly connected to the conduit 5 by screws.

[0055] In the present utility model, with the cooperation of multiple spray holes 50, it helps to stably carry out the biogas mixing cooperation. With the cooperation of the flame stabilizing disc 51, a low-speed zone of blunt body recirculation with weak swirl is formed, which helps to carry out the combustion-supporting cooperation.

[0056] Specifically, the cooling air pipe 30 and the biogas passage 3 are of an integrally formed structure, and the cooling air pipe 30 penetrates through the biogas passage 3 and the conduit 5.

[0057] In the present utility model, the setting of the cooling air pipe 30 cools the biogas burner nozzle structure in the form of axial jet, reducing the influence of high temperature during long-term use on the damage of the ends of the conduit 5 and the distribution branch pipes 6.

[0058] When the biogas burner of this embodiment is in use, the user first combines and connects the distribution branch pipe 6 with the distribution hole 60 and the conduit 5 with multiple spray holes 50, and the flame stabilizing disc 51 is adhesively fixed to the conduit 5. The conduit 5 penetrates into the outer shell 1 and is fixedly connected to the biogas passage 3. Then the cooling air pipe 30 penetrates through the biogas passage 3 and the conduit 5 in sequence. The small fire passage 10 with the small flame stabilizing chamber 100 is combined and fixed with the outer shell 1. The small flame stabilizing chamber 100 extends to one side of the distribution branch pipe 6. Then the flame gathering hood 4 is combined with one end of the outer shell 1 to carry out the protective cooperation for the distribution branch pipe 6 and the flame stabilizing disc 51;

[0059] Biogas enters the interior from the biogas passage 3, and combustion-supporting air enters the interior from the combustion-supporting air passage 2. The staged structure entrains a large amount of flue gas after burnout into the flame root and the interior of the combustion-supporting air, reducing the flame temperature in the core area, thereby significantly reducing the generation amount of nitrogen oxides. Moreover, the opening of the drain pipe 11 helps to timely discharge the condensed water of the internal combustion-supporting air, reducing the impact of accumulation on the interior. The overall combination is convenient to install, has a simple structure, and reduces the damage to the end conduit 5 and the distribution branch pipe 6 caused by excessive combustion temperature.

Claims

1. A biogas burner, comprising a housing (1), a fire hood (4) being provided at the left end of the housing (1), a biogas channel (3) being provided at the middle of the right end of the housing (1), a conduit (5) being provided at one end of the biogas channel (3) extending to the inside of the housing (1), characterized in that: A small fire channel (10) is provided at the right end of the shell (1) near the top, and the small fire channel (10) penetrates the shell (1) and extends into the fire hood (4). The end of the conduit (5) extends into the fire hood (4), and a plurality of distribution branches (6) are provided at the end of the conduit (5). The ends of the distribution branches (6) are provided with distribution holes (60). A plurality of spray holes (50) are provided on the outer wall of the conduit (5) near the end. A flame stabilizing disk (51) is also sleeved on the outer wall of the conduit (5) near the edge. A cooling air pipe (30) is also provided on the biogas channel (3), and the cooling air pipe (30) extends into the conduit (5).

2. The biogas burner according to claim 1, characterized in that: A combustion-supporting air passage (2) communicating with the interior is provided on the outer wall of the outer shell (1) near the middle, and the combustion-supporting air passage (2) is fixed to the outer shell (1) by welding.

3. The biogas burner according to claim 1, characterized in that: A drainage pipe (11) communicating with the interior is also provided on the right end surface of the outer shell (1), and the drainage pipe (11) is bonded and fixed to the outer shell (1).

4. The biogas burner according to claim 1, characterized in that: A plurality of jet holes (12) are provided at the junction of the shell (1) and the fire hood (4), the jet holes (12) are distributed in a circular shape with equal intervals, and the jet holes (12) communicate with the interior of the shell (1) and the outer space.

5. The biogas burner according to claim 1, characterized in that: The small fire channel (10) is welded and fixed to the outer shell (1); the end of the small fire channel (10) extends into the fire hood (4), and a small combustion stabilization chamber (100) is provided at the end.

6. The biogas burner according to claim 1, characterized in that: The end of the biogas channel (3) is welded and fixed to the end of the conduit (5); a spoiler (7) is sleeved in the middle of the outer wall of the conduit (5); the spoiler (7) is adhesively fixed to the conduit (5); the conduit (5) is welded and fixed to the outer shell (1); the distribution branch pipes (6) are distributed in a circular shape with equal spacing; the interior of the distribution branch pipes (6) is interconnected with the interior of the conduit (5); and the distribution branch pipes (6) are welded and fixed to the conduit (5).

7. The biogas burner according to claim 6, characterized in that: The spray holes (50) are distributed in a circular shape with equal intervals, the flame stabilizing disk (51) is in a disc shape, and the flame stabilizing disk (51) is fixedly connected to the conduit (5) by means of screws.

8. The biogas burner according to claim 1, characterized in that: The cooling air pipe (30) and the biogas channel (3) are an integrally formed structure, and the cooling air pipe (30) penetrates the biogas channel (3) and the conduit (5).

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