A low-nitrogen burner with adjustable injection volume

Abstract

The present invention relates to the technical field of burners, specifically a low-nitrogen burner with adjustable ejection amount, comprising a central gas pipe, an air duct, a double-layer chamber, and an ejector, wherein the central gas pipe is arranged in the air duct, the double-layer chamber is arranged outside the air duct, the ejector is arranged inside one end of the double-layer chamber, the ejector and the double-layer chamber are slidably connected, the ejector and the air duct are connected through an ejector adjustment mechanism, and there are cavities between the ejector and the double-layer chamber, and between the ejector and the air duct. Compared with the prior art, the present invention has the following beneficial effects: the present invention is provided with an internal circulation system, which has a simple structure, a simple process, and occupies less space, and also makes the nitrogen oxide content in the exhaust gas lower than the existing external circulation system. The internal circulation system of the present invention is provided with an adjustment device, which can adjust the flue gas recovery amount according to the flue gas size when in use.

Description

Technical Field

[0001] The invention relates to the technical field of burners, in particular to a low-nitrogen burner with adjustable injection volume. Background Art

[0002] A burner is a device that converts substances into heat energy through a chemical reaction called combustion. This involves mixing air and fuel in appropriate proportions to ensure complete combustion. Existing burners incorporate an external circulation system at the exhaust port to ensure that the nitrogen oxide content in the exhaust gas meets national emission standards. This external circulation system re-inhales the flue gas after primary combustion into the burner for secondary combustion, thereby reducing the nitrogen oxide content in the final exhaust gas. While this circulation system solves the problem of high nitrogen oxide content in the exhaust gas, it also presents issues such as cumbersome operation procedures, complex structure, and large space requirements. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a low-nitrogen burner with adjustable injection volume, which solves the problems of the existing external circulation system such as cumbersome operation process, complex structure and large space occupation.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a low-nitrogen burner with adjustable ejection amount, comprising a central gas pipe, a wind tube, a double-layer chamber, and an ejector, wherein the central gas pipe is arranged in the wind tube, the double-layer chamber is arranged outside the wind tube, the ejector is arranged inside one end of the double-layer chamber, the ejector and the double-layer chamber are slidingly connected, the ejector and the wind tube are connected by an ejector adjustment mechanism, and there are cavities between the ejector and the double-layer chamber, and between the ejector and the wind tube.

[0005] A baffle is provided inside the double-layer chamber near the ejector position. The baffle is fixedly connected to the wind tube. There is a cavity between the end of the double-layer chamber and the wind tube. A plurality of diversion pipes are provided on the baffle.

[0006] The end of the diverter tube is a bevel cut, and the bevel of the bevel cut faces the center of the ejector.

[0007] A cover plate is provided on the bevel cutout, and the cover plate is provided with a plurality of ventilation holes.

[0008] The ejector is provided with an ejector outer tube and an ejector inner tube. Several fixing plates are provided between the ejector outer tube and the ejector inner tube. The ejector inner tube is connected to the ejector adjustment mechanism. The ejector outer tube is slidably connected to the double-layer chamber.

[0009] The ejector adjustment mechanism includes a plurality of ejector adjustment pull plates, one end of which is fixedly connected to the ejector inner tube, and the other end is connected to the air duct through an adjustment device.

[0010] The central gas pipe is connected to the air duct through a supporting frame.

[0011] The end portion of the central gas pipe close to one end of the ejector is provided with a flame stabilizing disk.

[0012] The end of the wind tube close to one end of the ejector is a conical ring.

[0013] A blower is provided at one end of the wind tube away from the ejector, and both the end of the central combustion tube away from the ejector and the end of the double-layer chamber away from the ejector are connected to natural gas pipes.

[0014] Compared with existing technologies, the present invention offers the following advantages: It incorporates an internal circulation system, which features a simple structure, streamlined process, and minimal space requirements. It also reduces the nitrogen oxide content in exhaust gas compared to existing external circulation systems. The internal circulation system is equipped with a regulating device that adjusts the amount of recovered flue gas according to the volume of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the main view of the present invention

[0016] Figure 2 for Figure 1 AA direction cross-sectional view shown

[0017] Figure 3 for Figure 1 Cross-sectional view in the BB direction

[0018] In the figure: 1. Central gas pipe; 2. Air duct; 3. Double-layer chamber; 4. Ejector; 6. Diverter pipe; 7. Cover plate; 8. Ejector outer tube; 9. Ejector inner tube; 10. Fixing plate; 11. Ejector adjustment pull plate; 12. Support frame; 13. Flame stabilizing plate; 14. Conical ring; 15. Fan; 16. Natural gas pipe; 17. Chute; 18. Ejector adjustment plate. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1-3As shown, a low-nitrogen burner with adjustable injection amount includes a central gas pipe 1, a wind tube 2, a double-layer chamber 3, and an ejector 4. The central gas pipe 1 is arranged in the wind tube 2, the double-layer chamber 3 is arranged outside the wind tube 2, and the ejector 4 is arranged inside one end of the double-layer chamber 3. The ejector 4 is slidingly connected to the double-layer chamber 3. The ejector 4 is connected to the wind tube 2 through an ejector adjustment mechanism. There are cavities between the ejector 4 and the double-layer chamber 3, and between the ejector 4 and the wind tube 2.

[0021] A baffle is provided inside the double-layer chamber 3 near the ejector 4. The baffle is fixedly connected to the wind tube 2. There is a cavity between the end of the double-layer chamber 3 and the wind tube 2. A plurality of diversion pipes 6 are provided on the baffle.

[0022] The end of the diverter tube 6 is a bevel cut, and the bevel of the bevel cut faces the center of the ejector 4.

[0023] A cover plate 7 is provided on the bevel cutout, and the cover plate 7 is provided with a plurality of ventilation holes.

[0024] The ejector 4 is provided with an ejector outer tube 8 and an ejector inner tube 9. A plurality of fixed plates 10 are provided between the ejector outer tube 8 and the ejector inner tube 9. The ejector inner tube 9 is connected to the ejector adjustment mechanism. A plurality of fixed plates 10 are provided on the outer tube wall of the ejector outer tube 8. A slide groove 17 is provided at a position corresponding to the inner cavity wall of the double-layer chamber 3 and the fixed plate 10. The fixed plate 10 cooperates with the slide groove 17 to realize a sliding connection.

[0025] The ejector adjustment mechanism includes a number of ejector adjustment pull plates 11, one end of the ejector adjustment pull plate 11 is fixedly connected to the ejector inner tube 9, and the other end is connected to the air duct 2 through an adjustment device. A straight slot hole is provided at the connection between the air duct 2 and the ejector adjustment pull plate 11. The adjustment device includes an ejector adjustment plate 18, the ejector adjustment plate 18, the ejector adjustment pull plate 11, and the straight slot hole are connected by bolts, and the straight slot hole is between the ejector adjustment plate 18 and the ejector adjustment pull plate 11. Adjustment screws are respectively provided on both sides of the ejector adjustment plate 18, one side screw connects the air duct 2 and the ejector adjustment plate 18, and the other side screw is fixed to the ejector adjustment plate 18 through a thread and contacts the double-layer chamber 3.

[0026] The central gas pipe 1 is connected to the air duct 2 via a support frame 12 .

[0027] The central gas pipe 1 is provided with a flame stabilizing disk 13 at one end close to the ejector 4 .

[0028] The end of the air cylinder 2 close to the ejector 4 is a conical ring 14.

[0029] The end of the wind tube 2 away from the ejector 4 is provided with a blower 15 , and the end of the central combustion tube 1 away from the ejector 4 and the end of the double-layer chamber 3 away from the ejector 4 are both connected to a natural gas pipe 16 .

[0030] The ejector adjustment mechanism includes but is not limited to the bolt mechanism described herein. Other simple mechanisms that can achieve the adjustment function, such as a gear mechanism, are within the protection scope of the present invention.

[0031] The working principle of the present invention is described below:

[0032] The fan blows the combustion air into the air duct 2. The conical ring 14 at the end of the air duct 2 near the ejector 4 is designed so that the outer circle combustion air is accelerated when passing through here and enters the cavity between the ejector outer tube 8 and the ejector inner tube 9. The inner circle combustion gas enters the ejector inner tube 9 at a uniform speed. Due to the flow velocity difference, a negative pressure cavity is formed between the ejector outer tube 8 and the ejector inner tube 9. The atmospheric pressure can press the exhaust gas after combustion into the negative pressure cavity through the cavity between the double-layer chamber 3 and the diverter pipe 6, and then be ejected again with the combustion air for secondary combustion to form an internal circulation.

[0033] The natural gas pipe 16 supplies natural gas to the double-layer chamber 3 and the central gas pipe 1 respectively. The natural gas is ejected through the flame stabilizing disk 13 provided on the central gas pipe 1 and the ventilation holes provided on the cover plate 7 of the diversion pipe 6. The ejected natural gas is mixed with the combustion-supporting air and the exhaust gas, ignited by the igniter, and fully burned.

[0034] Rotate the bolts connecting the air duct 2 and the ejector adjustment plate 18, and adjust the ejector 4 to move forward and backward through the ejector adjustment pull plate 11, thereby adjusting the size of the cavity between the ejector outer tube 8 and the conical ring 14, and then changing the ejection amount of the burner. After the ejection amount adjustment is completed, rotate the screw on the other side of the ejector adjustment plate 18 to make it contact with the double-layer chamber 3, thereby limiting the movement of the ejector adjustment plate 18.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-nitrogen burner with adjustable injection volume, characterized by: The invention comprises a central gas pipe (1), a wind tube (2), a double-layer chamber (3), and an ejector (4), wherein the central gas pipe (1) is arranged in the wind tube (2), the double-layer chamber (3) is arranged outside the wind tube (2), the ejector (4) is arranged inside one end of the double-layer chamber (3), the ejector (4) and the double-layer chamber (3) are slidably connected, the ejector (4) and the wind tube (2) are connected through an ejector adjustment mechanism, there are cavities between the ejector (4) and the double-layer chamber (3), and between the ejector (4) and the wind tube (2), the ejector (4) is provided with an ejector outer tube (8), an ejector inner tube (9), a plurality of fixing plates (10) are provided between the ejector outer tube (8) and the ejector inner tube (9), the ejector inner tube (9) is connected to the ejector adjustment mechanism, the ejector outer tube (8) and the double-layer chamber (3) are connected to the ejector inner tube (9), and the ejector outer tube (8) and the double-layer chamber (3) are connected to the ejector inner tube (9). The chamber (3) is slidably connected, and the ejector adjustment mechanism includes a plurality of ejector adjustment pull plates (11). One end of the ejector adjustment pull plate (11) is fixedly connected to the ejector inner tube (9), and the other end is connected to the air duct (2) through an adjustment device. A straight slot hole is provided at the connection between the air duct (2) and the ejector adjustment pull plate (11). The adjustment device includes an ejector adjustment plate (18). The ejector adjustment plate (18), the ejector adjustment pull plate (11), and the straight slot hole are connected by bolts. The straight slot hole is between the ejector adjustment plate (18) and the ejector adjustment pull plate (11). Adjustment screws are respectively provided on both sides of the ejector adjustment plate (18). One side screw connects the air duct (2) and the ejector adjustment plate (18), and the other side screw is fixed to the ejector adjustment plate (18) through a thread and contacts the double-layer chamber (3).

2. The low-nitrogen burner with adjustable injection amount according to claim 1, characterized in that: A baffle is provided inside the double-layer chamber (3) near the ejector (4), the baffle being fixedly connected to the wind tube (2), a cavity being provided between the end of the double-layer chamber (3) and the wind tube (2), and a plurality of diversion pipes (6) being provided on the baffle.

3. The low-nitrogen burner with adjustable injection amount according to claim 2, characterized in that: The end of the diverter tube (6) is a bevel cut, and the bevel of the bevel cut faces the center of the ejector (4).

4. The low-nitrogen burner with adjustable injection amount according to claim 3, characterized in that: A cover plate (7) is provided on the bevel cutout, and the cover plate (7) is provided with a plurality of ventilation holes.

5. The low-nitrogen burner with adjustable injection amount according to claim 1, characterized in that: The central gas pipe (1) is connected to the wind tube (2) via a support frame (12).

6. The low-nitrogen burner with adjustable injection volume according to claim 1, characterized in that: A flame stabilizing disk (13) is provided at one end of the central gas pipe (1) close to the ejector (4).

7. The low-nitrogen burner with adjustable injection volume according to claim 1, characterized in that: The end of the wind tube (2) close to the ejector (4) is a conical ring (14).

8. The low-nitrogen burner with adjustable injection volume according to claim 1, characterized in that: A fan (15) is provided at one end of the wind tube (2) away from the ejector (4), and a natural gas pipe (16) is connected to one end of the central gas pipe (1) away from the ejector (4) and one end of the double-layer chamber (3) away from the ejector (4).

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