Machine head for full-premixing burner

Abstract

The utility model relates to the technical field of combustors, and discloses a machine head for a full-premixing combustor, which comprises a combustion head, the combustion head comprises a connecting cylinder communicated with a mixing cavity, the connecting cylinder is connected with a high-temperature-resistant metal net cylinder, one end of the connecting cylinder far away from the mixing cavity is detachably connected with a fire cylinder, and a plurality of fire holes are uniformly distributed in the circumferential direction of the fire cylinder. The fire cylinder and the metal net cylinder are coaxially arranged and connected to the inner side of the metal net cylinder in a sleeving mode, a limiting piece capable of limiting the fire cylinder is connected to the metal net cylinder, a plurality of holes are evenly formed in the metal net cylinder in the circumferential direction, the diameter of the fire holes is larger than that of the holes, and the diameter of the holes is smaller than the diameter needed by tempering; and the connecting cylinder is provided with a waste heat utilization assembly which can be used for cooling the fire cylinder and recycling waste heat between the fire cylinder and the metal net cylinder. Compared with the prior art, the utility model has the advantages that the fire cylinder is convenient to disassemble and maintain, the temperature of the fire cylinder is convenient to reduce, the heat is reutilized, and the waste is reduced.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, specifically to a burner head for a fully premixed burner. Background Technology

[0002] A fully premixed burner, also known as a completely premixed burner, is designed according to the fully premixed combustion method. This type of burner consists of two parts: a mixing device and a burner head. It can form a completely mixed gas-air mixture inside the burner, and this mixture burns at the burner head, forming a short and rapid high-temperature flame.

[0003] Existing fully premixed burners typically use bimetallic mesh or porous ceramic plates fixed inside the burner head to stabilize the flame. However, the mesh is not removable, making it difficult to maintain and clean the burner holes. Furthermore, excessively high burner temperatures can cause backfire, which in turn affects combustion stability. Utility Model Content

[0004] I. Technical problems to be solved

[0005] The technical problem this invention aims to solve is that the metal mesh is not detachable, making it inconvenient to maintain and clean the fire holes; and the excessively high temperature of the fire tube can also cause backfire, thus affecting the combustion stability.

[0006] II. Technical Solution

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a burner head for a fully premixed burner, comprising a burner head, the burner head including a connecting cylinder communicating with a mixing chamber, a high-heat resistant metal mesh cylinder connected to the connecting cylinder, a fire tube detachably connected to the end of the connecting cylinder away from the mixing chamber, a plurality of fire holes evenly distributed around the circumference of the fire tube, the fire tube being coaxially arranged with the metal mesh cylinder and sleeved inside the metal mesh cylinder, a limiting member for limiting the fire tube being connected to the metal mesh cylinder, a plurality of pores evenly distributed around the circumference of the metal mesh cylinder, the diameter of the fire holes being larger than the diameter of the pores, and the diameter of the pores being smaller than the diameter required for tempering; a waste heat utilization component is provided between the fire tube and the metal mesh cylinder on the connecting cylinder for cooling the fire tube and reusing the waste heat.

[0008] Furthermore, the connecting cylinder is provided with a guide cavity that can reduce the airflow velocity. The guide cavity has a frustum structure, and the diameter of the end of the guide cavity that communicates with the mixing cavity is smaller than the diameter of the end that communicates with the inside of the fire tube.

[0009] Furthermore, the limiting component includes a limiting plate and an annular groove connected to the connecting cylinder. The annular groove cooperates with the end of the fire tube, and the other end of the fire tube abuts against the limiting plate. A plurality of limiting blocks are evenly distributed around the circumference of the metal mesh cylinder, and a plurality of flexible limiting buckles are provided around the circumference of the limiting plate. The limiting plate limits the fire tube by cooperating with the limiting buckles and the limiting blocks.

[0010] Furthermore, the limiting plate includes an end plate and a stepped ring. A side ring is provided between the stepped ring and the end plate. The side ring can support the inner wall of the fire tube. The limiting buckle is connected to the other end of the stepped ring in the circumferential direction. The end of the stepped ring near the side plate abuts against the fire tube, and the end of the stepped ring near the limiting buckle abuts against the metal mesh tube.

[0011] Furthermore, the waste heat utilization component includes several heat-conducting plates arranged circumferentially between the fire tube and the metal mesh tube. The inner wall of the heat-conducting plate is disposed against the fire tube, and the other end of the heat-conducting plate is provided with a heat dissipation plate in the mixing chamber through a heat-conducting rod.

[0012] Furthermore, the heat sink has a planar spiral structure.

[0013] III. Beneficial Effects

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] The combination of metal mesh tube, fire tube, fire hole, and pores facilitates the setup of a bimetallic tube. The pores allow for the redistribution of the flame from the fire hole to form several independent flames, and the fact that the pore diameter is smaller than that required for backfire prevents flame backfire. The detachable design of the fire tube and connecting tube, along with the use of limiting components, allows for the disassembly of the fire tube, facilitating the maintenance of both the fire tube and the metal mesh tube. The waste heat recovery component facilitates the cooling of the fire tube, preventing excessively high temperatures during combustion that could affect flame stability, and also allows for the reuse of recovered waste heat, avoiding energy waste. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a fully premixed burner head according to this utility model.

[0017] Figure 2 This is a schematic diagram of the main cross-sectional structure of a fully premixed burner head according to this utility model.

[0018] Figure 3 yes Figure 2 A magnified structural diagram of A in the middle.

[0019] Figure 4 yes Figure 2 A magnified structural diagram of B in the diagram.

[0020] As shown in the figure: 1. Connecting cylinder, 2. Metal mesh cylinder, 3. Mixing chamber, 4. Combustion head, 5. Fire tube, 6. Fire hole, 7. Hole, 8. Guide cavity, 9. Annular groove, 10. Limiting plate, 11. Limiting block, 12. Limiting buckle, 13. Stepped ring, 14. End plate, 15. Heat-conducting plate, 16. Heat dissipation plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] To prevent backfire, combined with the attached Figure 1 and Figure 2 A premixed burner head includes a burner head 4, which includes a connecting cylinder 1 communicating with a mixing chamber 3. A heat-resistant metal mesh cylinder 2 is connected to the connecting cylinder 1. A fire tube 5 is located at the end of the connecting cylinder 1 furthest from the mixing chamber 3. A guide cavity 8, which reduces airflow velocity, is located inside the connecting cylinder 1. The guide cavity 8 has a frustum-shaped structure. The diameter of the end of the guide cavity 8 communicating with the mixing chamber 3 is smaller than the diameter of the end communicating with the inner side of the fire tube 5. Based on Bernoulli's principle, as the fluid flow cross-section increases, the flow velocity decreases. This can improve the stability of the flame. The fire tube 5 is provided with several fire holes 6 evenly distributed around its circumference. The fire tube 5 is coaxially arranged with the metal mesh tube 2 and sleeved inside the metal mesh tube 2. The metal mesh tube 2 is provided with a limiting member that can limit the position of the fire tube 5. The metal mesh tube 2 is provided with several holes 7 evenly distributed around its circumference. The diameter of the fire hole 6 is larger than the diameter of the hole 7, and the diameter of the hole 7 is smaller than the diameter required for backfire. The flames led out by the fire hole 6 can be redistributed through the holes 7 to form several independent flames, thus avoiding backfire of the independent flames.

[0024] To facilitate stable positioning of the fire tube 5, and to facilitate its disassembly, maintenance, and cleaning of both the fire tube 5 and the metal mesh tube 2, thus preventing clogging of the fire hole 6, in conjunction with the attached... Figure 2 , Figure 3 and Figure 4The connecting cylinder 1 is detachably connected to a fire tube 5 at one end away from the mixing chamber 3. A limiting member is connected to the metal mesh cylinder 2 to limit the movement of the fire tube 5. The limiting member includes a limiting plate 10 and an annular groove 9 connected to the connecting cylinder 1. The annular groove 9 engages with the end of the fire tube 5. The other end of the fire tube 5 abuts against the limiting plate 10. The limiting plate 10 includes an end plate 14 and a stepped ring 13. A side ring is connected between the stepped ring 13 and the end plate 14, and the side ring supports the inner wall of the fire tube 5. A limiting buckle 12 is connected to the stepped ring. 13. At the other end of the stepped ring 13, one end of the stepped ring 13 near the side plate abuts against the fire tube 5, and the other end of the stepped ring 13 near the limiting buckle 12 abuts against the metal mesh tube 2. The limiting plate 10 limits the fire tube 5 through the cooperation of the limiting buckle 12 and the limiting block 11. First, one end of the fire tube 5 is engaged with the ring groove 9. At this time, the heat-conducting plate 15 can also support the outer wall of the fire tube 5. Then, the limiting plate 10 is engaged with the other end of the fire tube 5 and the metal mesh tube 2, and the limiting buckle 12 and the limiting block 11 are engaged to achieve the limiting and sealing of the fire tube 5.

[0025] Example 2

[0026] Based on Example 1, combined with Appendix Figure 2 and Figure 3 To further reduce the temperature of the fire tube 5, ensure flame stability, and facilitate preheating of the gas in the mixing chamber 3 using residual heat to avoid heat waste, combined with the attached... Figure 1 The connecting cylinder 1 is provided with a waste heat utilization component between the fire cylinder 5 and the metal mesh cylinder 2, which can cool the fire cylinder 5 and reuse the waste heat. The waste heat utilization component includes a plurality of heat-conducting plates 15 arranged circumferentially between the fire cylinder 5 and the metal mesh cylinder 2. The inner wall of the heat-conducting plate 15 is disposed against the fire cylinder 5. The other end of the heat-conducting plate 15 is provided with a heat dissipation plate 16 in the mixing chamber 3 through a heat-conducting rod. The heat dissipation plate 16 has a planar spiral structure, which can increase the contact area between the heat dissipation plate 16 and the gas while ensuring gas flow, thereby increasing the heat exchange efficiency.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0029] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A premixed burner head, comprising a burner head (4), the burner head (4) including a connecting cylinder (1) communicating with a mixing chamber (3), the connecting cylinder (1) being provided with a high-heat resistant metal mesh cylinder (2), characterized in that: The connecting cylinder (1) is detachably connected to a fire tube (5) at the end away from the mixing chamber (3). The fire tube (5) is provided with a number of fire holes (6) evenly distributed around its circumference. The fire tube (5) is coaxially arranged with the metal mesh cylinder (2) and sleeved inside the metal mesh cylinder (2). The metal mesh cylinder (2) is connected with a limiting member that can limit the fire tube (5). The metal mesh cylinder (2) is provided with a number of holes (7) evenly distributed around its circumference. The diameter of the fire holes (6) is larger than the diameter of the holes (7), and the diameter of the holes (7) is smaller than the diameter required for tempering. The connecting cylinder (1) is provided with a waste heat utilization component between the fire cylinder (5) and the metal mesh cylinder (2) to cool down the fire cylinder (5) and reuse the waste heat.

2. The burner head for a fully premixed burner according to claim 1, characterized in that: The connecting cylinder (1) is provided with a guide cavity (8) that can reduce the air flow rate. The guide cavity (8) has a frustum structure. The diameter of the end of the guide cavity (8) that is connected to the mixing cavity (3) is smaller than the diameter of the end that is connected to the inside of the fire tube (5).

3. The burner head for a fully premixed combustor according to claim 1, characterized in that: The limiting component includes a limiting plate (10) and an annular groove (9) connected to the connecting cylinder (1). The annular groove (9) cooperates with the end of the fire tube (5). The other end of the fire tube (5) abuts against the limiting plate (10). The metal mesh cylinder (2) is evenly distributed with several limiting blocks (11) in the circumference. The limiting plate (10) is provided with several flexible limiting buckles (12) in the circumference opposite to each other. The limiting plate (10) limits the fire tube (5) through the cooperation of the limiting buckles (12) and the limiting blocks (11).

4. The burner head for a fully premixed combustor according to claim 3, characterized in that: The limiting plate (10) includes an end plate (14) and a stepped ring (13) that abuts against the fire tube (5). A side ring is provided between the stepped ring (13) and the end plate (14). The side ring can support the inner wall of the fire tube (5). The limiting buckle (12) is connected to the stepped ring (13) circumferentially.

5. The burner head for a fully premixed burner according to claim 1, characterized in that: The waste heat utilization component includes several heat-conducting plates (15) arranged circumferentially between the fire tube (5) and the metal mesh tube (2). The inner wall of the heat-conducting plate (15) is abutted against the fire tube (5), and the other end of the heat-conducting plate (15) is provided with a heat dissipation plate (16) in the mixing chamber (3) through a heat-conducting rod.

6. The burner head for a fully premixed combustor according to claim 5, characterized in that: The heat sink (16) has a planar spiral structure.

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