Low-nitrogen combustor

Abstract

The utility model discloses a low-nitrogen burner which comprises a shell, a burner block fixedly arranged in the shell, an air module connected with the burner block and a fuel gas module, the burner block is provided with a channel communicated with a combustion chamber of the shell, the air module is provided with an air pipeline communicated with the channel, the fuel gas module is provided with a fuel gas pipeline, and the fuel gas pipeline is communicated with the channel. The gas pipeline is arranged in the air pipeline and the channel, a rotary vane is arranged at the end of the gas pipeline and arranged in the channel, the rotary vane comprises a body arranged outside the gas pipeline in a sleeving mode and guide grooves formed in the periphery of the body, the extending direction of the guide grooves is not parallel to the axial direction of the body, and a plurality of guide grooves are formed in the circumferential direction of the body. And a plurality of gas nozzles communicated with the gas pipeline are arranged on the circumferential side wall of the body. The low-nitrogen burner is reasonable in structure, the rotary vane is arranged, fuel gas and air are fully stirred in a rotating mode, and therefore sufficient burning is achieved, vortex-shaped flames are formed, and generation of nitric oxide is reduced.

Description

Technical Field

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

[0002] In an industrial furnace, a burner plays a role of distributing fuel and combustion-supporting air, and burning after spraying in a certain manner.

[0003] In the existing technology, air of the burner is introduced from the upper part along an air duct to be mixed with gas, and finally ignited at the front end of the burner. For the burner with such a structure, air and gas are often not fully mixed, which affects the combustion effect and leads to high nitrogen oxide emissions.

[0004] Therefore, it is necessary to improve the low-nitrogen burner in the existing technology. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects existing in the existing technology, and provide a low-nitrogen burner, which is provided with a rotating vane to fully stir and mix gas and air in a rotating manner, so as to burn fully, form a vortex-shaped flame, and reduce the generation of nitrogen oxides.

[0006] To achieve the above technical effects, the technical solution of the utility model is: a low-nitrogen burner, comprising a shell, a burner block fixedly arranged in the shell, an air module and a gas module connected to the burner block. The burner block is provided with a channel communicating with a combustion chamber of the shell. The air module is provided with an air duct communicating with the channel. The gas module is provided with a gas duct. The gas duct is arranged in the air duct and the channel. A rotating vane is arranged at the end of the gas duct. The rotating vane is arranged in the channel. The rotating vane comprises a body sleeved outside the gas duct and a guiding groove arranged on the outer periphery of the body. The extending direction of the guiding groove is non-parallel to the axial direction of the body. A plurality of guiding grooves are arranged along the circumferential direction of the body. A plurality of gas nozzles communicating with the gas duct are arranged on the circumferential side wall of the body.

[0007] The preferred technical solution is that an ignition duct is arranged in the gas duct. The end of the ignition duct protrudes outside the rotating vane, and an ignition gas outlet is arranged at the end of the ignition duct.

[0008] The preferred technical solution is that the rotating vane is provided with an electrode for igniting in cooperation with the ignition gas outlet.

[0009] The preferred technical solution is that the rotating vane is provided with an ion probe for detecting a flame, and the ion probe and the electrode are symmetrically arranged.

[0010] Preferably, the air module is provided with a fire viewing mirror for observing the flame condition inside the housing.

[0011] Preferably, the ignition pipeline is provided with a pressure measuring nozzle.

[0012] Preferably, the outer periphery of the rotating vane is adjacently arranged with the inner wall of the channel.

[0013] The advantages and beneficial effects of the present utility model are as follows: The low-nitrogen burner of the present utility model has a reasonable structure. By arranging a rotating vane in the burner brick, the gas is ejected from the gas nozzle of the rotating vane, and the air passes through the rotating guide groove of the rotating vane to rotate and mix with the gas and burn fully, achieving the purpose of reducing nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of an embodiment of the low-nitrogen burner of the present utility model;

[0015] Figure 2 is Figure 1 an exploded view of

[0016] Figure 3 is Figure 1 a cross-sectional view of

[0017] Figure 4 is Figure 2 a cross-sectional view of

[0018] Figure 5 is a schematic structural diagram of the rotating vane;

[0019] In the figure: 1. Housing; 11. Combustion chamber; 2. Burner brick; 21. Channel; 3. Air module; 31. Air pipeline; 32. Fire viewing mirror; 4. Gas module; 41. Gas pipeline; 5. Rotating vane; 51. Body; 52. Guide groove; 53. Gas nozzle; 6. Ignition pipeline; 61. Ignition gas outlet; 62. Pressure measuring nozzle; 7. Electrode; 8. Ion probe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following combines the drawings and embodiments to further describe the specific embodiments of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Embodiment

[0022] As Figures 1-5 shown, the low-nitrogen burner of the embodiment includes a housing 1, a burner brick 2 fixedly arranged in the housing 1, an air module 3 connected to the burner brick 2, and a gas module 4. The burner brick 2 is provided with a channel 21 communicating with the combustion chamber 11 of the housing 1. The air module 3 is provided with an air duct 31 communicating with the channel 21. The gas module 4 is provided with a gas duct 41. The gas duct 41 is arranged in the air duct 31 and the channel 21. A rotating vane 5 is arranged at the end of the gas duct 41. The rotating vane 5 is arranged in the channel 21. The rotating vane 5 includes a body 51 sleeved outside the gas duct 41 and a guiding groove 52 arranged on the outer periphery of the body 51. The extending direction of the guiding groove 52 is not parallel to the axial direction of the body 51. A plurality of guiding grooves 52 are arranged along the circumferential direction of the body 51. A plurality of gas nozzles 53 communicating with the gas duct 41 are arranged on the circumferential side wall of the body 51.

[0023] Through such a design, gas enters from the gas duct 41 and sprays out from the gas nozzles 53 of the rotating vane 5. Air enters from the air duct 31, rotates and mixes with the sprayed gas through the rotating guiding groove 52, is fully stirred, and burns fully, forming a swirling flame, thereby reducing the generation of nitrogen oxides.

[0024] Specifically, an ignition duct 6 is arranged in the gas duct 41. The end of the ignition duct 6 protrudes outside the rotating vane 5. An ignition gas outlet 61 is arranged at the end of the ignition duct 6.

[0025] Through such a design, the purpose of preliminary ignition in the combustion chamber 11 is achieved, and the ignition success rate of the gas-air mixture is improved.

[0026] Specifically, the rotating vane 5 is provided with an electrode 7 for cooperating with the ignition gas outlet 61 for ignition.

[0027] Through such a design, the purpose of ignition is achieved.

[0028] Further, the rotating vane 5 is provided with an ion probe 8 for detecting flames, and the ion probe is symmetrically arranged with the electrode 7.

[0029] Through such a design, it is possible to detect whether there is a flame in the combustion chamber 11.

[0030] Specifically, the air module 3 is provided with a viewing mirror 32 for observing the flame condition in the housing 1.

[0031] Specifically, the ignition pipeline 6 is provided with a pressure measuring nozzle 62.

[0032] Specifically, the outer periphery of the rotating vane 5 is adjacent to the inner wall of the channel 21.

[0033] Through such a design, it is ensured that air passes through the guide groove 52 as much as possible to form a swirling air flow, ensuring sufficient mixing with the fuel gas.

[0034] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A low-nitrogen burner, characterized in that, It includes a housing (1), a burner block (2) fixedly arranged inside the housing (1), an air module (3) and a gas module (4) connected to the burner block (2). The burner block (2) is provided with a channel (21) communicating with the combustion chamber (11) of the housing (1). The air module (3) is provided with an air duct (31) communicating with the channel (21). The gas module (4) is provided with a gas duct (41). The gas duct (41) is arranged inside the air duct (31) and the channel (21). A rotating vane (5) is arranged at the end of the gas duct (41). The rotating vane (5) is arranged inside the channel (21). The rotating vane (5) includes a body (51) sleeved outside the gas duct (41) and a guiding groove (52) arranged on the outer periphery of the body (51). The extending direction of the guiding groove (52) is non-parallel to the axial direction of the body (51). A plurality of guiding grooves (52) are arranged along the circumferential direction of the body (51). A plurality of gas nozzles (53) communicating with the gas duct (41) are arranged on the circumferential side wall of the body (51).

2. The low-nitrogen burner according to claim 1, characterized in that, An ignition duct (6) is arranged inside the gas duct (41). The end of the ignition duct (6) protrudes outside the rotating vane (5). An ignition gas outlet (61) is arranged at the end of the ignition duct (6).

3. The low-nitrogen burner according to claim 2, wherein The rotating vane (5) is provided with an electrode (7) for igniting in cooperation with the ignition gas outlet (61).

4. The low-nitrogen burner according to claim 3, wherein, The rotating vane (5) is provided with an ion probe (8) for detecting flame. The ion probe is symmetrically arranged with the electrode (7).

5. The low-nitrogen burner according to claim 1, characterized in that, The air module (3) is provided with a sight glass (32) for observing the flame condition inside the housing (1).

6. The low-nitrogen burner according to claim 2, wherein The ignition duct (6) is provided with a pressure measuring nozzle (62).

7. The low-nitrogen burner according to claim 1, characterized in that, The outer periphery of the rotating vane (5) is adjacent to the inner wall of the channel (21).

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