Natural gas low-nitrogen burner

Abstract

The utility model relates to the field of combustors, and discloses a natural gas low-nitrogen combustor which comprises a gas pipeline and an air pipeline, a flow control plate is connected in the air pipeline in a sliding mode in the direction perpendicular to the air circulation direction, a valve is hinged in the gas pipeline, and the flow control plate is in linkage with the valve. The flow control plate is externally driven to control the air flow, and meanwhile, the flow control plate drives the connecting piece and the valve to control the gas flow through the driving block and the driven block, so that the mixing ratio of gas and air is not influenced while flames are controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a natural gas low-nitrogen burner. Background Art

[0002] Low-nitrogen burners are designed to reduce nitrogen oxide emissions through specific combustion technology. Nitrogen oxides are one of the main components of air pollution and can cause environmental problems such as acid rain, photochemical smog and ozone layer depletion. The use of low-nitrogen burners can help all industries meet environmental protection standards and reduce negative impacts on the environment.

[0003] The Chinese utility model patent with authorization announcement number CN219571913U discloses a bottom-fired natural gas low-nitrogen burner, including a gas pipeline, a combustion-supporting air pipeline and a fuel nozzle; the gas pipeline is partially penetrated inside the combustion-supporting air pipeline; the fuel nozzle is connected to one end of the gas pipeline, and the fuel nozzle is connected to a fuel branch pipe, and the fuel branch pipe is provided with multiple and evenly distributed on the outer side wall of the fuel nozzle, and the fuel branch pipe is provided with multiple fuel spray holes, and the fuel spray holes are connected to the combustion-supporting air pipeline.

[0004] However, in the implementation of the prior art, when the flame size needs to be adjusted, the gas flow rate can be adjusted by adjusting the gas pipeline through external equipment. However, the air flow rate in the air pipeline remains unchanged, resulting in different proportions of mixing of the gas and the combustion-supporting air, affecting the environmental protection standards for the emission of nitrogen compounds. Utility Model Content

[0005] The utility model aims to provide a natural gas low-nitrogen burner which has the effect of not affecting the mixing ratio of gas and air when adjusting the flame.

[0006] The above technical purpose of the utility model is achieved through the following technical scheme: a flow control plate is slidably connected in the air duct perpendicular to the air circulation direction, a valve is hinged in the gas pipeline, and the flow control plate is linked to the valve.

[0007] By adopting the above technical solution, by setting the valve and the flow control plate, the position of the flow control plate in the air duct is operated to control the flow of air in the air duct. At the same time, the flow control plate is linked with the valve, and the flow of gas in the gas pipeline can also be controlled, so that the purpose of not affecting the mixing ratio of gas and air when adjusting the flame size can be achieved.

[0008] The utility model is further configured as follows: the air duct includes a first air pipe and a second air pipe that are perpendicular to each other, the gas duct includes a first gas pipe and a second gas pipe that are perpendicular to each other, the first gas pipe is vertically arranged and a connecting piece is slidably connected to the bottom end, the valve is hinged to the end of the second gas pipe connected to the first gas pipe, the movement trajectory of the connecting piece intersects with the valve, the flow control plate is slidably connected to the first air pipe, and the flow control plate is linked to the connecting piece.

[0009] By adopting the above technical solution, by setting a connecting piece, the flow control plate controls the lifting and lowering of the connecting piece in the first gas pipe while sliding. The lifting and lowering of the connecting piece adjusts the angle between the valve and the gas pipe, thereby adjusting the flow of gas in the gas pipeline.

[0010] The utility model is further configured as follows: a driving block is slidably connected to the bottom end of the second air pipe, the driving block is fixedly connected to the flow control plate, the bottom end of the connecting piece is connected to a first connecting rod, the first connecting rod penetrates the first gas pipe, the bottom end of the first connecting rod is connected to a driven block, the connecting piece presses the driven block against the bottom end of the second air pipe, and the motion trajectory of the driving block intersects with the motion trajectory of the driven block.

[0011] The utility model is further configured as follows: the top end of the driving block and the bottom end of the driven block are both configured as curved surfaces, and a spring is connected between the driven block and the first gas pipe.

[0012] By adopting the above technical solution, by setting a driving block and a driven block, the flow control plate moves toward the direction of the nozzle, driving the driving block to move toward the driven block, and continuing to move will drive the driven block upward. The connecting piece reduces the opening between the valve and the second gas pipe while moving upward. Therefore, the flow control plate and the valve increase and decrease the flow rate at the same time, and the purpose of synchronously regulating the flow rate can be achieved; by setting a spring, under normal conditions, the connecting piece will press the driven block against the bottom end of the second air pipe, and the spring is compressed. When the driving block acts on the driven block to rise, the spring naturally stretches. When the driving block is disconnected from the driven block, the spring continues to be compressed, and at the same time, the driven block is placed quickly against the second air pipe, which can achieve the purpose of vibration reduction.

[0013] The utility model is further configured as follows: the first air pipe is equipped with a cylinder, and the piston end of the cylinder is connected to the flow control plate.

[0014] The utility model is further configured as follows: a sealing ring is provided on the outer ring of the connecting piece.

[0015] By adopting the above technical solution, the purpose of preventing gas leakage in the gas pipe can be achieved.

[0016] The utility model is further configured as follows: a torsion spring is provided between the valve and the second gas pipe.

[0017] By adopting the above technical solution, when the valve is not subjected to force, the torsion spring drives the valve to press against the top of the connecting piece.

[0018] The utility model is further configured as follows: a first stopper is provided on a side of the valve away from the connecting piece near the hinge, a second stopper is provided on the second gas pipe near the valve, and a motion trajectory of the first stopper intersects with the second stopper.

[0019] By adopting the above technical solution, it is prevented that the torsion spring fails or the valve rotates in the second fuel pipe cavity due to airflow.

[0020] The utility model is further configured as follows: the flow control plate is provided with a groove for the first gas pipe to slide.

[0021] The utility model is further configured as follows: a second connecting rod is connected between the flow control plate and the driving block.

[0022] The beneficial effect of the utility model is that by setting a connecting piece and a flow control plate, the flow control plate is driven by the outside world to control the air flow rate, and at the same time, the flow control plate drives the connecting piece and the valve through the driving block and the driven block to control the gas flow rate, thereby achieving flame control without affecting the mixing ratio of gas and air. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0026] Figure 3 yes Figure 2 Schematic diagram of the local structure of the second gas pipe.

[0027] Figure 4 It is a partial structural cross-sectional view of the flow control plate of the utility model.

[0028] In the figure, 1, gas pipeline; 11, first gas pipe; 111, connecting piece; 1111, sealing ring; 112, first connecting rod; 113, driven block; 114, spring; 12, second gas pipe; 121, second block; 13, valve; 131, torsion spring; 132, first block; 2, air pipeline; 21, first air pipe; 22, second air pipe; 221, driving block; 23, flow control plate; 231, groove; 232, second connecting rod; 24, cylinder. DETAILED DESCRIPTION

[0029] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Embodiment, a natural gas low nitrogen burner, such as Figure 1-Figure 4 As shown, it includes an air pipe 2 and a gas pipe 1. The air pipe 2 is mounted on the gas pipe 1. The air pipe 2 includes a vertically arranged first air pipe 21 and a horizontally arranged second air pipe 22. The gas pipe 1 includes a vertically arranged first gas pipe 11 and a horizontally arranged second gas pipe 12. A cylinder 24 is installed on the outside of the air pipe 2. The first air pipe 21 is slidably connected to a flow control plate 23 perpendicular to the air circulation direction. The flow control plate 23 is provided with a groove 231 for sliding of the first gas pipe 11. The piston end of the cylinder 24 is fixedly connected to the flow control plate 23. The bottom end of the second air pipe 22 is slidably connected to a driving block 221. The top end of the driving block 221 is set as a semicircular curved surface. A second connecting rod 232 is connected between the flow control plate 23 and the driving block 221. The second connecting rod 232 is penetrated by the second air pipe 22.

[0031] Further, such as Figure 1-Figure 4 As shown, a connecting piece 111 is slidably connected inside the first gas pipe 11, a sealing ring 1111 is arranged on the outer ring of the connecting piece 111, a first connecting rod 112 is connected to the bottom end of the connecting piece 111, the first connecting rod 112 penetrates the first gas pipe 11, a follower block 113 is connected to the bottom end of the first connecting rod 112, a spring 114 is connected to the follower block 113 and the bottom end of the first gas pipe 11, the bottom end of the follower block 113 is arranged as a semicircular curved surface, a valve 13 is hingedly connected to the end of the second gas pipe 12 near the first gas pipe 11, a torsion spring 131 is arranged between the valve 13 and the second gas pipe 12, a first stopper 132 is arranged near the hinge at the bottom end of the side of the valve 13 away from the connecting piece 111, and a second stopper 121 is arranged near the valve 13 at the end of the second gas pipe 12.

[0032] Its working principle is: the cylinder 24 drives the flow control plate 23 to slide in the first air pipe 21 to control the flow of air in the air pipe 2, and at the same time the second connecting rod 232 drives the driving block 221 to push the driven block 113 upward, the connecting piece 111 slides upward and pushes the valve 13 upward, and the valve 13 swings at the end of the second gas pipe 12. The flow of gas in the gas pipeline 1 is controlled by controlling the size of the valve 13, thereby controlling the size of the flame, and does not affect the mixing ratio of air and gas.

Claims

1. A natural gas low-nitrogen burner, comprising a gas pipeline (1) and an air pipeline (2), Features: A flow control plate (23) is slidably connected in the air duct (2) perpendicular to the air circulation direction, a valve (13) is hinged in the gas duct (1), and the flow control plate (23) is linked to the valve (13).

2. A natural gas low nitrogen burner according to claim 1, Features: The air pipeline (2) comprises a first air pipe (21) and a second air pipe (22) which are perpendicular to each other; the gas pipeline (1) comprises a first gas pipe (11) and a second gas pipe (12) which are perpendicular to each other; the first gas pipe (11) is vertically arranged and a connecting piece (111) is slidably connected to the bottom end; the valve (13) is hinged to the end of the second gas pipe (12) connected to the first gas pipe (11); the movement trajectory of the connecting piece (111) intersects with the valve (13); the flow control plate (23) is slidably connected to the first air pipe (21); and the flow control plate (23) is linked to the connecting piece (111).

3. A natural gas low nitrogen burner according to claim 2, Features: The bottom end of the second air pipe (22) is slidably connected to a driving block (221), the driving block (221) is fixedly connected to the flow control plate (23), the bottom end of the connecting piece (111) is connected to a first connecting rod (112), the first connecting rod (112) penetrates the first gas pipe (11), the bottom end of the first connecting rod (112) is connected to a driven block (113), the connecting piece (111) presses the driven block (113) against the bottom end of the second air pipe (22), and the motion trajectory of the driving block (221) intersects with the motion trajectory of the driven block (113).

4. A natural gas low nitrogen burner according to claim 3, Features: The top end of the driving block (221) and the bottom end of the driven block (113) are both arranged as curved surfaces, and a spring (114) is connected between the driven block (113) and the first gas pipe (11).

5. A natural gas low nitrogen burner according to claim 4, Features: The first air pipe (21) is equipped with a cylinder (24), and the piston end of the cylinder (24) is connected to the flow control plate (23).

6. A natural gas low nitrogen burner according to claim 5, Features: The outer ring of the connecting piece (111) is provided with a sealing ring (1111).

7. A natural gas low nitrogen burner according to claim 6, Features: A torsion spring (131) is provided between the valve (13) and the second gas pipe (12).

8. A natural gas low nitrogen burner according to claim 7, Features: A first stopper (132) is provided on the side of the valve (13) facing away from the connecting piece (111) near the hinge, and a second stopper (121) is provided on the second gas pipe (12) near the valve (13), and a movement trajectory of the first stopper (132) intersects with that of the second stopper (121).

9. A natural gas low nitrogen burner according to claim 8, Features: The flow control plate (23) is provided with a groove (231) for the first gas pipe (11) to slide.

10. A natural gas low nitrogen burner according to claim 9, Features: A second connecting rod (232) is connected between the flow control plate (23) and the driving block (221).

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