Premixing type burner
By using a premixed burner design with multiple combustion points and a through-hole structure, the problem of increasing output power while reducing nitrogen oxide emissions is solved, resulting in a more efficient combustion effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-03-06
AI Technical Summary
Existing burners have difficulty increasing their output power while reducing nitrogen oxide emissions.
The premixed burner design incorporates multiple through holes and channels within the burner, allowing the fuel gas and auxiliary fuel gas to burn at multiple points. This reduces the flame temperature and increases the fuel gas exhaust rate, resulting in multiple combustion points and enhanced combustion power.
It effectively reduced the flame temperature, decreased the formation of nitrogen oxides, and increased the output power of the burner.
Smart Images
Figure CN223976029U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of burner equipment, specifically to a premixed burner. Background Technology
[0002] Gas burners use natural gas and other gases as fuel and are characterized by complete combustion, high combustion temperature, and easy combustion control. They are widely used in various industries, such as petrochemicals, building materials, power, textiles, printing and dyeing, steel, metallurgy, machinery, and food.
[0003] Burners are widely used in industrial equipment to provide heat, and linear burners are often the preferred choice to meet the requirement of uniform heating within ducts. To reduce nitrogen oxide emissions, the flame temperature of the burner is lowered to decrease nitrogen oxide formation. To minimize nitrogen oxide emissions, and considering space utilization, linear burners are desirable to output higher power per unit length. Here, burner power refers to the heat generated by the burner per unit time.
[0004] Therefore, the technical problem that this application needs to solve is: how to increase the output power of the burner while reducing nitrogen oxides. Utility Model Content
[0005] To address the aforementioned technical problems, this invention proposes a premixed burner that can reduce flame temperature to decrease nitrogen oxide formation while simultaneously increasing burner power. Specifically, the gas in the gas flow channel combusts with the combustion-supporting gas in the combustion chamber through a first through-hole, and the gas in the gas flow channel combusts with the combustion-supporting gas in the combustion-supporting gas flow channel through a second through-hole, creating multiple combustion points. Compared to solutions with concentrated combustion resulting in high flame temperatures, this solution employs multiple combustion points, effectively reducing flame temperature. The presence of both the first and second through-holes in this design increases the gas exhaust rate, thereby enhancing combustion power.
[0006] Specifically, this utility model proposes a premixed burner, comprising:
[0007] The housing has an air inlet chamber and a combustion chamber. One end of the housing has a combustion air inlet communicating with the air inlet chamber, and the other end of the housing has an opening communicating with the combustion chamber.
[0008] A mixing device is located inside the housing and between the air inlet chamber and the combustion chamber. The mixing device has a combustion-supporting gas channel and a gas channel. One end of the combustion-supporting gas channel communicates with the air inlet chamber, and the other end communicates with the combustion chamber. The inlet of the gas channel is connected to a gas intake pipe assembly. The mixing device has a first through hole for communicating between the combustion chamber and the gas channel, and a second through hole for communicating between the gas channel and the combustion-supporting gas channel.
[0009] Spark plug, which is mounted on the housing.
[0010] Preferably, the housing has an ignition chamber inside, which is connected to the combustion chamber. The housing has an ignition gas inlet that communicates with the ignition chamber, and the ignition end of the spark plug extends into the ignition chamber.
[0011] Preferably, the combustion-supporting gas flow channel includes a plurality of direct-flow holes, one end of which is connected to the air inlet chamber and the other end of which is connected to the combustion chamber.
[0012] Preferably, the combustion-supporting gas flow channel includes a plurality of inclined through ports, which are used to connect the air inlet chamber and the combustion chamber, and the through ports communicate with the second through hole.
[0013] Preferably, the through-hole is arranged on the upper and lower sides of the gas flow channel.
[0014] Preferably, the combustion chamber is provided with a baffle, and the baffle has an opening in the middle.
[0015] Preferably, the air inlet chamber is provided with a baffle plate, and a gap is left between the edge of the baffle plate and the inner wall of the air inlet chamber to facilitate the flow of combustion gas.
[0016] Preferably, the housing is provided with a fire observation port.
[0017] Preferably, the housing is provided with a wind pressure switch interface.
[0018] Preferably, the housing is provided with a gas testing interface.
[0019] Preferably, the extension direction of the gas flow channel is parallel to the width direction of the housing. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0021] Figure 1 This is a three-dimensional structural schematic diagram of the premixed burner proposed in this embodiment from one perspective;
[0022] Figure 2 This is a three-dimensional structural schematic diagram of the premixed burner proposed in this embodiment from another perspective;
[0023] Figure 3 This is a schematic diagram of the premixed burner proposed in this embodiment from the front view.
[0024] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;
[0025] Figure 5 yes Figure 4 Cross-sectional view along the BB direction;
[0026] Figure 6 This is a top view of the premixed burner proposed in this embodiment;
[0027] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure in the CC direction;
[0028] Figure 8 yes Figure 6 Schematic diagram of the cross-sectional structure along the DD direction;
[0029] Figure 9 yes Figure 6 A schematic diagram of the cross-sectional structure along the HH direction.
[0030] The reference numerals used in the attached figures are as follows:
[0031] 11-Shell; 12-Air inlet chamber; 13-Combustion chamber; 14-Combustion air inlet; 15-Opening; 16-Mixing device; 17-Combustion gas flow channel; 18-Gas flow channel; 19-Gas inlet pipe assembly; 20-First through hole; 21-Second through hole; 22-Ignition chamber; 23-Spark plug; 24-Ignition gas inlet; 25-Direct flow hole; 26-Through opening; 27-Baffle; 28-Opening; 29-Wind deflector; 30-Observation port; 31-Air pressure switch interface; 32-Gas test interface; 33-Connecting flow channel; 34-End plate; 35-Wing plate. Detailed Implementation
[0032] The technical solutions of this application will be further described below with reference to specific embodiments, but this application is not limited to these embodiments.
[0033] like Figures 1 to 9 As shown, this embodiment proposes a premixed burner, comprising:
[0034] The housing 11 has an air inlet chamber 12 and a combustion chamber 13. One end of the housing 11 has a combustion air inlet 14 that communicates with the air inlet chamber 12, and the other end of the housing 11 has an opening 15 that communicates with the combustion chamber 13.
[0035] The mixing device 16 is located inside the housing 11 and between the air inlet chamber 12 and the combustion chamber 13. The mixing device 16 has a combustion-supporting gas flow channel 17 and a gas flow channel 18. One end of the combustion-supporting gas flow channel 17 is connected to the air inlet chamber 12, and the other end of the combustion-supporting gas flow channel 17 is connected to the combustion chamber 13. The inlet of the gas flow channel 18 is connected to a gas intake pipe assembly 19. The mixing device 16 is provided with a first through hole 20 for connecting the combustion chamber 13 and the gas flow channel 18, and a second through hole 21 for connecting the gas flow channel 18 and the combustion-supporting gas flow channel 17.
[0036] Spark plug 23 is mounted on housing 11.
[0037] The technical advantages of this solution are: it can reduce the flame temperature to decrease the formation of nitrogen oxides, while simultaneously increasing the power of the burner.
[0038] In this scheme, the gas in the gas flow channel 18 burns with the combustion-supporting gas in the combustion chamber 13 through the first through hole 20, and the gas in the gas flow channel 18 burns with the combustion-supporting gas in the combustion-supporting gas flow channel 17 through the second through hole 21, forming a situation of multiple combustion points. Compared with the scheme where the flame temperature is high when the combustion is concentrated, this scheme adopts multiple combustion points, which can effectively reduce the flame temperature.
[0039] On the other hand, this solution has a first through hole 20 and a second through hole 21, which can increase the exhaust rate of the gas and thus improve the combustion power.
[0040] Furthermore, there are multiple first through holes 20 and multiple second through holes 21. The extension direction of the gas flow channel 18 is parallel to the width direction of the housing 11, and the multiple first through holes 20 are uniformly linearly arrayed along the extension direction of the gas flow channel 18.
[0041] As one embodiment of this invention, the housing 11 has an ignition chamber 22 inside, and the ignition chamber 22 is connected to the combustion chamber 13 through a connecting channel 33 on the housing 11. The housing 11 has an ignition gas inlet 24 that communicates with the ignition chamber 22, and the ignition end of the spark plug 23 extends into the ignition chamber 22.
[0042] The technical effect of this solution is that the ignition gas flows into the ignition chamber 22 through the ignition gas inlet 24, and under the action of the spark plug 23, the ignition gas is burned, thereby enabling the gas in the combustion chamber 13 to be burned.
[0043] In one embodiment of this invention, the combustion-supporting gas flow channel 17 includes a plurality of direct-flow holes 25, one end of which is connected to the air inlet chamber 12, and the other end of which is connected to the combustion chamber 13. The technical advantage of this solution is that it facilitates the flow of combustion-supporting gas into the combustion chamber 13.
[0044] As one embodiment of this example, the combustion-supporting gas flow channel 17 includes a plurality of inclined through ports 26, which are used to connect the air intake chamber 12 and the combustion chamber 13, and the through ports 26 are connected to the second through hole 21.
[0045] The technical effect of this solution is that the second through hole 21 introduces the gas in the gas flow channel 18 into the through port 26, and the gas mixes and burns with the combustion-supporting gas in the through port 26. Since there are multiple through ports 26, multiple flame combustion ports are formed, which disperses the flame combustion and effectively reduces the flame temperature. In addition, the mixing device 16 is made of metal material, which has a certain thermal conductivity, further reducing the flame temperature.
[0046] Furthermore, the through-ports 26 are arranged on the upper and lower sides of the gas flow channel 18, with the ends of the through-ports 26 on both sides close to each other. Furthermore, a baffle 27 is provided in the combustion chamber 13, with an opening 28 in the middle of the baffle 27. Gas in the through-ports 26 flows obliquely into the combustion chamber 13, where it swirls under the action of the baffle 27, further improving the mixing efficiency between the gas and the combustion-supporting gas.
[0047] In one embodiment of this invention, an air inlet chamber 12 is provided with a baffle plate 29. A gap is left between the edge of the baffle plate 29 and the inner wall of the air inlet chamber 12 to facilitate the flow of combustion-supporting gas. Furthermore, the upper and lower ends of the baffle plate 29 are fixed to the inner wall of the housing, and a gap is left between the side wall of the baffle plate 29 and the inner wall of the housing to restrict the flow of combustion-supporting gas. This facilitates the uniform flow of combustion-supporting gas into the through-hole 26 and the direct-flow hole 25.
[0048] In one embodiment of this invention, the housing 11 is provided with a viewing port 30. The technical advantage of this solution is that it facilitates observation of the flame's combustion. Furthermore, the housing 11 is provided with a gas test interface 32 and a wind pressure switch interface 31. The wind pressure switch detects the wind pressure during burner operation to ensure that the gas pressure remains within a safe range, thereby improving the safety of burner use.
[0049] The housing 11 is further provided with end plates 34 and wing plates 35, with the two end plates 34 arranged opposite each other and the two wing plates 35 arranged opposite each other. Each end plate 34 is fixed between two adjacent wing plates 35 by bolts, and the cavity formed by the two end plates 34 and the two wing plates 35 is the combustion chamber 13.
[0050] The working principle of this solution is as follows:
[0051] Ignition gas flows into ignition chamber 22 through ignition gas inlet 24, and combustion occurs under the action of spark plug 23;
[0052] Combustion-supporting gas enters the air intake chamber 12 through the combustion air inlet 14. Guided by the baffle 29, the combustion-supporting gas flows through the gap between the side wall of the baffle 29 and the housing 11, flowing into the direct flow hole 25 and the through-hole 26, and finally into the combustion chamber 13. Gas flows into the gas flow channel 18 through the gas intake pipe assembly 19. A portion of the gas flows into the combustion chamber 13 through the first through-hole 20 for combustion, while another portion flows into the through-hole 26 through the second through-hole 21 for combustion.
[0053] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A premix burner, characterized in that It comprises: a shell (11) in which an air inlet chamber (12) and a combustion chamber (13) are arranged, one end of the shell (11) is provided with a combustion air inlet (14) through the air inlet chamber (12), and the other end of the shell (11) is provided with an open mouth (15) through the combustion chamber (13); a mixing device (16) located inside the shell (11), and the mixing device (16) is located between the air inlet chamber (12) and the combustion chamber (13), the mixing device (16) has a combustion gas flow channel (17) and a gas flow channel (18); one end of the combustion gas flow channel (17) is through the air inlet chamber (12), and the other end of the combustion gas flow channel (17) is through the combustion chamber (13); the input port of the gas flow channel (18) is connected with a gas inlet pipe assembly (19); the mixing device (16) is provided with a first through hole (20) for passing through the combustion chamber (13) and the gas flow channel (18), and the mixing device (16) is provided with a second through hole (21) for passing through the gas flow channel (18) and the combustion gas flow channel (17); a spark plug (23) installed on the shell (11).
2. The premix burner according to claim 1, characterized in that The inside of the shell (11) is provided with an ignition chamber (22) which communicates with the combustion chamber (13), and the shell (11) is provided with an ignition gas inlet (24) through the ignition chamber (22), and the ignition end of the spark plug (23) extends into the ignition chamber (22).
3. The premix burner according to claim 1, characterized in that The combustion gas flow channel (17) comprises a plurality of straight-through holes (25), one end of the straight-through hole (25) communicates with the air inlet chamber (12), and the other end of the straight-through hole (25) communicates with the combustion chamber (13).
4. The premix combustor of claim 1, wherein The combustion gas flow channel (17) comprises a plurality of inclined through holes (26) for communicating the air inlet chamber (12) and the combustion chamber (13), and the through holes (26) are through the second through hole (21).
5. The premix burner according to claim 4, characterized in that The through holes (26) are arranged on the upper and lower sides of the gas flow channel (18).
6. The premix burner according to claim 5, characterized in that The combustion chamber (13) is provided with a baffle (27), and the middle part of the baffle (27) is provided with an opening (28).
7. The premix combustor of claim 1, wherein The air inlet chamber (12) is provided with a wind baffle (29), and a gap is left between the edge of the wind baffle (29) and the inner wall of the air inlet chamber (12) for the flow of combustion gas.
8. The premix combustor of claim 1, wherein The shell (11) is provided with a fire observation port (30).
9. The premix combustor of claim 1, wherein The shell (11) is provided with a wind pressure switch interface (31).
10. The premix combustor of claim 1, wherein The shell (11) is provided with a gas test interface (32).