Sectional type burner for pyrolysis gasification furnace

Abstract

The utility model discloses a burner for a sectional type pyrolysis gasification furnace. The burner comprises a pyrolysis gas pipeline and a combustion-supporting air pipeline, a second flange is arranged at the end of a gas outlet of the bent section part, a third flange is arranged at the end of a gas inlet of the straight section part, the bent section part and the straight section part are connected through the second flange and the third flange, a pyrolysis gas scattering device is arranged at the end of a gas outlet of the straight section part, and the pyrolysis gas scattering device is of a plate-shaped structure with holes; a combustion-supporting air pipeline is arranged on the outer layer of the straight-section pyrolysis gas pipeline in a sleeving mode, the air inlet end of the combustion-supporting air pipeline is connected with the third flange, the air inlet is communicated with the combustion-supporting air pipeline, the igniter opening is communicated with an air inlet of the straight-section part, and a cyclone piece is arranged at an air outlet of the combustion-supporting air pipeline. An air outlet of the combustion-supporting air pipeline and an air outlet of the straight section part coincide to form a combustion cavity. The pyrolysis gas burner is simple in structure, convenient to install, small in occupied space and capable of guaranteeing sufficient mixing of pyrolysis gas and air and enabling the pyrolysis gas to be combusted sufficiently.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, specifically to a burner for a segmented pyrolysis gasification furnace. Background Technology

[0002] The main methods of waste treatment include landfill, incineration, composting, and pyrolysis gasification. Pyrolysis gasification technology is widely used due to its advantages such as low investment, low dioxin content, and high volume reduction. The pyrolysis gas produced by the pyrolysis gasifier needs to be burned through burners. The heat from the combustion can be used for power generation, hot water production, etc. Therefore, the quality of subsequent products is closely related to the combustion process of the pyrolysis gas. Traditional burners, due to their inadequate structural design and inconvenient disassembly, result in uneven mixing of pyrolysis gas and air, leading to incomplete combustion of the mixture and affecting the quality of subsequent products. Utility Model Content

[0003] Therefore, this utility model provides a burner for a segmented pyrolysis gasification furnace to solve the above-mentioned problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] According to a first aspect of the present invention, a burner for a segmented pyrolysis gasification furnace includes a pyrolysis gas pipeline and a combustion air pipeline.

[0006] The pyrolysis gas pipeline includes a curved section and a straight section. The inlet end of the curved section is provided with a first flange, which is used to connect to the outlet of the pyrolysis gasifier. The outlet end of the curved section is provided with a second flange, and the inlet end of the straight section is provided with a third flange. The curved section and the straight section are connected by the second flange and the third flange. The outlet end of the straight section is provided with a pyrolysis gas disperser, which is a perforated plate structure.

[0007] The combustion air duct is sleeved on the outer layer of the straight section pyrolysis gas duct. The air inlet end of the combustion air duct is connected to the third flange. An air inlet and an igniter port are provided along the length of the combustion air duct, penetrating the second flange and the third flange. The air inlet is connected to the combustion air duct, and the igniter port is connected to the air inlet of the straight section. The air outlet of the combustion air duct is provided with a cyclone vane. The air outlet of the combustion air duct and the air outlet of the straight section coincide to form a combustion chamber.

[0008] Furthermore, a first hole is formed in the middle of the plate-like structure, and a plurality of second holes are formed around the first hole, wherein the diameter of the second holes is smaller than the diameter of the first hole, and the plurality of second holes are of equal size.

[0009] Furthermore, the cyclone vanes are arc-shaped, and multiple cyclone vanes are arranged circumferentially along the outlet of the straight pyrolysis gas pipeline.

[0010] Furthermore, the igniter port is provided with an igniter conduit along the length of the straight section, the igniter conduit is located in the middle layer of the straight section, and the length of the igniter conduit is less than or equal to the length of the straight section.

[0011] Furthermore, the cyclone blades consist of a total of 15 blades.

[0012] Furthermore, both the second and third flanges are non-standard flanges, and the inner diameter of the second and third flanges is the same as the outer diameter of the straight section.

[0013] Furthermore, the curved section is a quarter-circle arc.

[0014] Furthermore, multiple pyrolysis gas dispersers are arranged along the length of the straight section, and the multiple pyrolysis gas dispersers are evenly spaced.

[0015] This utility model has the following advantages:

[0016] The segmented structure of the pyrolysis gas pipeline, coupled with specially designed flange connections, greatly facilitates on-site installation and subsequent maintenance. During installation, connections to the gasifier and various components can be completed step-by-step and systematically. In the event of component damage, only the corresponding flange connection needs to be disassembled for rapid replacement of the damaged part, significantly reducing maintenance time and costs and ensuring efficient equipment operation. Simultaneously, the pyrolysis gas disperser, with its unique porous plate structure, disperses the pyrolysis gas into multiple fine airflows of varying sizes and directions. This transforms the relatively concentrated and regular flow of the pyrolysis gas into a highly dispersed and widely spread state, exponentially increasing the contact surface area with the combustion air. This effectively eliminates potential agglomeration and caking of the pyrolysis gas, laying a solid foundation for uniform mixing. Arc-shaped cyclone vanes at the combustion air pipeline outlet work in concert, guiding and turbulently flowing the combustion air, causing it to be fully agitated and mixed during rotation, ensuring complete combustion of the pyrolysis gas in the combustion chamber. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 This is a schematic diagram of the overall structure of a burner for a segmented pyrolysis gasification furnace, provided for some embodiments of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of a pyrolysis gas disperser for a burner in a segmented pyrolysis gasification furnace, provided for some embodiments of the present invention.

[0021] In the diagram: 1. First flange; 2. Bend section; 3. Second flange; 4. Third flange; 5. Combustion air duct; 6. Straight section; 7. Ignition pipe; 8. Cyclone vane; 9. Pyrolysis gas disperser; 901. First hole; 902. Second hole; 10. Air inlet; 11. Ignition port. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figures 1 to 2 As shown, a burner for a segmented pyrolysis gasification furnace in the first aspect embodiment of the present invention includes a pyrolysis gas pipeline and a combustion air pipeline 5.

[0024] The pyrolysis gas pipeline includes a bend section 2 and a straight section 6. The bend section 2 is typically a quarter-circle arc. A first flange 1 is provided at the inlet end of the bend section 2, which connects to the outlet of the pyrolysis gasifier. A second flange 3 is provided at the outlet end of the bend section 2, and a third flange 4 is provided at the inlet end of the straight section 6. The bend section 2 and the straight section 6 are connected via the second flange 3 and the third flange 4. A pyrolysis gas disperser 9 is provided at the outlet end of the straight section 6. The pyrolysis gas disperser 9 is a perforated plate structure. Multiple pyrolysis gas dispersers 9 are arranged along the length of the straight section 6, and are evenly spaced. Typically, the pyrolysis gas disperser 9 is arranged parallel to the second flange 3 or the third flange 4, and concentrically with the straight section 6.

[0025] Combustion air duct 5 is installed on the outer layer of the straight section pyrolysis gas duct. The air inlet end of combustion air duct 5 is connected to the third flange 4. An air inlet 10 and an igniter port 11 are provided along the length of combustion air duct 5, penetrating the second flange 3 and the third flange 4. The air inlet 10 is connected to combustion air duct 5, and the igniter port 11 is connected to the air inlet of the straight section 6. The air outlet of combustion air duct 5 is provided with a cyclone vane 8. The air outlet of combustion air duct 5 and the air outlet of straight section 6 overlap to form a combustion chamber. The air outlet of straight section 6 is located inside the air outlet of combustion air duct 5.

[0026] Usage and working principle:

[0027] Prepare the bend and straight sections of the pyrolysis gas pipeline. Carefully inspect the first flange at the inlet end of the bend section to ensure its flatness meets requirements, the bolt holes are unblocked and undeformed, and the dimensional accuracy is within tolerance. This is crucial for ensuring a tight and precise connection with the gas outlet of the pyrolysis gasifier. Clean the surface of the first flange to remove oil, rust, and other impurities to ensure a tight seal.

[0028] Perform a thorough inspection and cleaning of the third flange at the inlet end of the straight section. Verify the fit between the second flange (located at the outlet end of the bend section) and the third flange, paying particular attention to the compatibility of the inner diameter with the outer diameter of the straight section. Both should fit tightly together, and the bolt hole positions must correspond perfectly to ensure a seamless connection. Using a specialized butt welding tool, align the end of the straight section with the third flange to the outlet end of the bend section, and slowly push until the second and third flanges are tightly fitted. Insert high-strength bolts and tighten them diagonally according to the designed torque value using a torque wrench. This completes the main assembly of the pyrolysis gas pipeline. Throughout the process, continuously check the straightness of the two pipeline sections using tools such as a right-angle ruler to ensure the overall structure is neat and orderly.

[0029] A pyrolysis gas disperser is installed at the outlet end of the straight section. Based on the designed spacing, for example, 10 cm intervals, the dispersers are inserted one by one into pre-welded positioning slots in the straight section and then welded securely to ensure stability. The disperser adopts a perforated plate structure with a large-diameter first hole in the center. Multiple smaller-diameter second holes are evenly distributed around the first hole. These holes are precision-machined and polished, with smooth, burr-free edges, facilitating the smooth passage and effective dispersion of pyrolysis gas.

[0030] Select a combustion air duct of suitable specifications and carefully fit it onto the outer layer of the assembled straight pyrolysis gas duct, ensuring concentricity between the two. Make sure the air inlet end of the combustion air duct is precisely connected to the third flange. Use a combination of sealing welding and sealant filling for connection. First, apply high-temperature resistant sealant evenly to the joint, and then perform continuous welding. After welding, check the weld quality to ensure there are no defects such as pores or cracks, and ensure sealing and connection strength.

[0031] Along the length of the combustion air duct, using high-precision CNC machining equipment, air inlets and igniter ports are precisely machined according to design dimensions, penetrating the second and third flanges. The air inlets are machined into circular shapes, with diameters designed according to the required combustion air flow rate, ensuring smooth connection with the internal space of the combustion air duct. The igniter port is rectangular and tightly connected to the air inlet of the straight section. At the location corresponding to the igniter port in the middle layer of the straight section, an igniter conduit is installed. This igniter conduit is made of high-temperature resistant alloy material and its length is 80% of the length of the straight section.

[0032] At the outlet of the combustion air duct, prepare 15 arc-shaped cyclone vanes made of 304 stainless steel with a thickness of 3 mm. The curvature is designed according to the circumference of the outlet. Using argon arc welding, and following the principle of uniform distribution around the circumference, weld and fix them one by one with a standard spacing of 2 cm between adjacent vanes. During the welding process, use special tooling to ensure that the angle of the vanes is consistent, so as to ensure that the combustion air can form a regular and strong rotating flow field at the outlet.

[0033] The pyrolysis gas disperser, with its unique porous plate structure, disperses the pyrolysis gas into multiple fine airflows of varying sizes and directions. This transforms the pyrolysis gas from a relatively concentrated and regular flow state to a highly dispersed and widely spread state, resulting in an exponential increase in the contact surface area with the combustion air. This effectively eliminates potential agglomeration and clumping of the pyrolysis gas, laying a solid foundation for uniform mixing. Arc-shaped cyclone vanes at the outlet of the combustion air duct work in concert, guiding and turbulently flowing the combustion air, causing it to be fully agitated and mixed during rotation, ensuring complete combustion of the pyrolysis gas in the combustion chamber.

[0034] A first hole 901 is formed in the center of the plate-like structure, and several second holes 902 are formed around the first hole 901. The diameter of each second hole 902 is smaller than that of the first hole 901, and all the second holes 902 are of equal size. The first hole 901 is responsible for the main flow transport, and its larger diameter ensures a relatively moderate flow velocity and reasonable pressure loss when the pyrolysis gas passes through. The presence of the second holes 902 shares some of the flow, and due to their smaller diameter, the flow velocity of the pyrolysis gas is increased, resulting in localized pressure variations. The combination of these two features promotes the formation of a multi-dimensional velocity and pressure field for the pyrolysis gas at the overall plate-like structure level. This prevents localized excessively high or low flow velocities and uneven pressure, ensuring that the gas components remain stable and well-coordinated when entering subsequent combustion chambers and other spaces. This facilitates stable and efficient mixing and combustion with the combustion air, improving combustion stability and efficiency.

[0035] Optionally, the cyclone vane 8 is arc-shaped and is also made of refractory material. There are 15 cyclone vanes 8 in total, and multiple cyclone vanes 8 are arranged around the circumference of the outlet of the straight section of the pyrolysis gas pipeline.

[0036] Optionally, the igniter port 11 is provided with an igniter pipe 7 along the length of the straight section 6. The igniter pipe 7 is located in the middle layer of the straight section 6, and the length of the igniter pipe 7 is less than or equal to the length of the straight section 6.

[0037] Optionally, the second flange 3 and the third flange 4 are both non-standard flanges, and the inner diameter of the second flange 3 and the third flange 4 are the same as the outer diameter of the straight section 6.

[0038] Optionally, a gate valve is installed at the air inlet 10 to regulate the air intake volume.

[0039] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0040] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A burner for a segmented pyrolysis gasification furnace, characterized in that, Including pyrolysis gas pipeline and combustion air pipeline (5); The pyrolysis gas pipeline includes a bend section (2) and a straight section (6). The inlet end of the bend section (2) is provided with a first flange (1), which is used to connect with the outlet of the pyrolysis gasifier. The outlet end of the bend section (2) is provided with a second flange (3). The inlet end of the straight section (6) is provided with a third flange (4). The bend section (2) and the straight section (6) are connected through the second flange (3) and the third flange (4). The outlet end of the straight section (6) is provided with a pyrolysis gas disperser (9), which is a perforated plate structure. The combustion air duct (5) is sleeved on the outer layer of the straight section pyrolysis gas duct. The air inlet end of the combustion air duct (5) is connected to the third flange (4). An air inlet (10) and an igniter port (11) are provided along the length of the combustion air duct (5) and pass through the second flange (3) and the third flange (4). The air inlet (10) is connected to the combustion air duct (5). The igniter port (11) is connected to the air inlet of the straight section (6). The air outlet of the combustion air duct (5) is provided with a cyclone vane (8). The air outlet of the combustion air duct (5) and the air outlet of the straight section (6) overlap to form a combustion chamber.

2. The burner for a segmented pyrolysis gasification furnace according to claim 1, characterized in that, The plate-like structure has a first hole (901) in the middle, and a plurality of second holes (902) are formed around the first hole (901). The diameter of the second holes (902) is smaller than the diameter of the first hole (901), and the plurality of second holes (902) are of equal size.

3. The burner for a segmented pyrolysis gasification furnace according to claim 1, characterized in that, The cyclone blades (8) are arc-shaped, and multiple cyclone blades (8) are arranged around the circumference of the outlet of the straight pyrolysis gas pipeline.

4. The burner for a segmented pyrolysis gasification furnace according to claim 1, characterized in that, The igniter port (11) is provided with an igniter pipe (7) along the length of the straight section (6). The igniter pipe (7) is located in the middle layer of the straight section (6). The length of the igniter pipe (7) is less than or equal to the length of the straight section (6).

5. A burner for a segmented pyrolysis gasification furnace according to claim 3, characterized in that, The cyclone blades (8) consist of 15 blades in total.

6. A burner for a segmented pyrolysis gasification furnace according to claim 1, characterized in that, The second flange (3) and the third flange (4) are both non-standard flanges. The inner diameter of the second flange (3) and the third flange (4) is the same as the outer diameter of the straight section (6).

7. A burner for a segmented pyrolysis gasification furnace according to claim 1, characterized in that, The curved section (2) is a quarter-circle arc.

8. The burner for a segmented pyrolysis gasification furnace according to claim 1, characterized in that, Multiple pyrolysis gas dispersers (9) are arranged along the length of the straight section (6), and the multiple pyrolysis gas dispersers (9) are evenly spaced.

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