Glow flame generating method of glow flame burner and glow flame burner

Abstract

The glow flame generation method of the glow flame burner and the glow flame burner of the present invention include the following steps: a. The premixed gas channel of the burner body transports the gas mixed with the combustion-supporting gas, which is ejected through the premixed gas nozzle and generates a pyrolysis flame around the outer periphery of the main gas nozzle. b. The gas transported by the main gas channel of the burner body is ejected through the main gas nozzle, and carbon particles are generated under the pyrolysis action of the pyrolysis flame. c. The combustion-supporting gas transported by the main air channel of the burner body is ejected through the main combustion air nozzle, mixed with the pyrolyzed main gas and burned to form a flame. In the glow flame generation method of the present invention, the mixed gas nozzle pre-generates a pyrolysis flame around the outer periphery of the main gas nozzle, forming a pyrolysis heating zone with high temperature and oxygen deficiency on the inner side, so that the ejected main gas generates high-temperature carbon particles under the pyrolysis action, and generates a high-radiation capacity and bright glow flame when mixed with the combustion-supporting gas and burned, thereby improving the thermal radiation performance and thermal interaction efficiency of the burner.

Description

Technical Field

[0001] The invention belongs to the technical field of burners, and in particular relates to a glow flame generating method of a glow flame burner and a glow flame burner. Background Art

[0002] Industrial heating furnaces used for high-temperature heating and melting applications, such as furnaces, industrial heating or heat treatment kilns, and ceramic kilns, often have certain requirements on the flame brightness and length of the burner due to process requirements. In the past, water gas was often used as the combustion gas source for the nozzle. With the use of natural gas, natural gas is being widely used as a gaseous fuel in view of its cleanness, environmental protection, and price advantages. Whether it is natural gas or other gaseous fuels, when ambient air (especially preheated air) is used as an oxidant, the gaseous flame is usually blue with very low luminosity and emissivity, which reduces the heat exchange efficiency between the flame and the material in the furnace, and has low economic benefits. Summary of the invention

[0003] The purpose of the present invention is to solve the problem of low luminosity and emissivity of blue flames produced by existing burners, and to provide a method for producing a glow flame of a glow flame burner which pre-pyrolyzes gas fuel to produce carbon particles and then burns them to produce a glow flame with brightness and high thermal radiation capacity.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for generating a glow flame of a glow flame burner comprises the following steps:

[0006] a. The premixed gas channel of the burner body transports the gas mixed with the combustion-supporting gas, which is ejected through the premixed gas nozzle and generates a pyrolysis flame surrounding the outer periphery of the main gas nozzle.

[0007] b. The fuel gas transported by the main fuel gas channel of the burner body is ejected through the main fuel gas nozzle and generates carbon particles under the pyrolysis action of the pyrolysis flame.

[0008] c. The combustion-supporting gas transported by the main air channel of the burner body is ejected through the main combustion air nozzle, mixed with the main combustion gas after pyrolysis and burned to form a combustion flame.

[0009] Compared with the prior art, the glow flame generating method of the glow flame burner of the present invention is that the mixed gas nozzle pre-generates a pyrolysis flame surrounding the outer periphery of the main gas nozzle, forming a pyrolysis heating zone with high temperature and oxygen deficiency on the inner side, so that the main gas ejected from the main gas nozzle produces high-temperature carbon particles under the action of pyrolysis, and can produce a high-radiation capacity and bright glow flame when mixed with the combustion-supporting gas, thereby improving the thermal radiation performance and thermal interaction efficiency of the burner and achieving good economic benefits.

[0010] Furthermore, part of the gas transported by the main gas channel is ejected through the flame-stabilizing gas nozzle, mixed with part of the combustion-supporting gas ejected from the main air channel, and then flows to the premixed gas nozzle through the reflux structure of the burner body for combustion. Through such an arrangement, the premixed gas nozzle is continuously provided with gas mixed with combustion-supporting gas, ensuring that the premixed gas nozzle can be continuously ignited, thereby stabilizing the flames of the premixed gas nozzle and the main gas nozzle.

[0011] Furthermore, part of the gas transported by the main gas channel flows to the premixed gas channel through the branch channel; through such an arrangement, the content of the gas transported by the premixed gas channel is guaranteed, the premixed gas nozzle can be continuously ignited, and the flame of the premixed gas nozzle is stabilized.

[0012] A glow burner includes a burner body and an igniter, wherein the burner body is provided with a main gas channel, a premixed gas channel and a main air channel; the main gas channel is provided with a main gas nozzle along one side of the gas outflow, the premixed gas channel is arranged outside the main gas channel, and is used to transport gas mixed with combustion-supporting gas, and the premixed gas nozzle is arranged around the outside of the main gas nozzle, and the premixed gas nozzle is used to generate a pyrolysis flame for pyrolyzing the main gas ejected from the main gas nozzle, and the main air channel is arranged outside the premixed gas channel, and the transported combustion-supporting gas is mixed and burned with the main gas after pyrolysis to form a combustion flame. Through such an arrangement, the mixed gas nozzle pre-generates a pyrolysis flame around the outer periphery of the main gas nozzle, forming a pyrolysis heating zone with high temperature and oxygen deficiency on the inner side, so that the main gas ejected from the main gas nozzle generates high-temperature carbon particles under pyrolysis, and can generate a high-radiation capacity and bright glow flame when mixed and burned with the combustion-supporting gas, thereby improving the thermal radiation performance and thermal interaction efficiency of the burner, and having good economic benefits.

[0013] Furthermore, the premixed gas channel is arranged along the gas delivery direction of the main gas channel, and a plurality of premixed gas channels are provided in a ring shape with the main gas channel as the center, and a plurality of premixed gas nozzles are provided one-to-one with the premixed gas channel; through such an arrangement; the premixed gas nozzles are arranged in a ring shape around the main gas nozzles, and the generated high-temperature pyrolysis flame wraps around the main gas, isolating the surrounding air, forming a high-temperature oxygen-deficient environment, and providing sufficient heat for the main gas pyrolysis zone.

[0014] Furthermore, the burner body is provided with a plurality of flame-stabilizing gas nozzles connected to the main gas channel at intervals on the periphery of the main gas nozzle, and the flame-stabilizing gas nozzles are arranged inclined to one side of the main air channel, and the burner body is provided with a reflux structure for mixing the gas sprayed through the flame-stabilizing gas nozzles with part of the combustion-supporting gas sprayed through the main air channel and then guiding the mixture to the premixed gas nozzle; through such an arrangement, the premixed gas nozzle is continuously provided with gas mixed with the combustion-supporting gas, thereby ensuring that the premixed gas nozzle can be continuously ignited and the flames of the premixed gas nozzle and the main gas nozzle are stabilized.

[0015] Furthermore, a plurality of premixed gas nozzles are arranged at intervals on the outer periphery of the main gas nozzle, and a plurality of flame-stabilizing gas nozzles are arranged on the inner side of the premixed gas nozzle and are staggered with the premixed gas nozzle in the radial direction; through such an arrangement, the flame-stabilizing gas nozzle is arranged on the side close to the main gas channel, with a compact and reasonable structure, and at the same time, it is convenient for the gas ejected from the flame-stabilizing gas nozzle to pass through the gap between adjacent premixed gas nozzles and mix with the combustion-supporting gas on the outside.

[0016] Furthermore, the main gas nozzles are provided in a plurality and arranged in a ring shape; through such an arrangement, the main gas nozzles can evenly spray the main gas in the pyrolysis environment, and the pyrolysis effect is good.

[0017] Furthermore, the burner body is provided with a plurality of flame stabilizing air nozzles located on the periphery of the premixed gas nozzle, and the flame stabilizing air nozzles are used to provide part of the combustion-supporting gas; through such an arrangement, sufficient oxygen combustion-supporting gas is provided in the burner to achieve the effect of optimizing flame stabilization.

[0018] Furthermore, a guide baffle is provided on one side of the outer side of the burner body along the gas delivery direction, and the guide baffle is arranged in a closed shape around the outer periphery of the burner body; through such an arrangement, it guides the ejected main fuel gas and combustion-supporting gas, thereby improving the range of the burner flame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the glow burner generating a glow flame

[0020] Figure 2 A schematic diagram of the front view of the glow flame burner

[0021] Figure 3 Axial cross-sectional view of the glow flame burner

[0022] Figure 4 A setting method for premixed gas nozzle

[0023] Figure 5 Another way to set up the premixed gas nozzle

[0024] Figure 6Another way to set up the premixed gas nozzle DETAILED DESCRIPTION

[0025] The technical solution of the present invention is described below in conjunction with the accompanying drawings:

[0026] Embodiment 1:

[0027] See also Figures 1 to 4 The method for generating a glow flame of a glow flame burner of the present invention comprises the following steps:

[0028] a. The premixed gas channel 31 of the burner body 1 delivers the gas mixed with the combustion-supporting gas, which is ejected through the premixed gas nozzle 311 and generates a pyrolysis flame 310 surrounding the outer periphery of the main gas nozzle 211.

[0029] b. The gas transported by the main gas channel 21 of the burner body 1 is ejected through the main gas nozzle 211 and generates carbon particles under the pyrolysis action of the pyrolysis flame 310.

[0030] c. The combustion-supporting gas 330 transported by the main air passage 32 of the burner body 1 is ejected through the main combustion air nozzle, mixed with the pyrolyzed main combustion gas 212 and burned to form a combustion flame.

[0031] The combustion-supporting gas 330 may be oxygen in the air or other combustion-supporting gases.

[0032] The glow flame generation method of the glow flame burner of the present invention utilizes the principle that gas fuel flame generates micro-carbon particles under high temperature conditions and oxygen-poor environment and that the micro-carbon particles play a leading role in the high thermal radiation intensity performance of the glow flame 210. By arranging a premixed gas nozzle 311 outside the main gas nozzle 211, the premixed gas nozzle 311 generates a high-temperature pyrolysis flame 310 that wraps the main gas nozzle 211, isolates the air outside the main gas nozzle 211, forms a high-temperature oxygen-poor environment, and provides sufficient heat for the pyrolysis zone of the main gas 212, so that the pyrolysis of the main gas 212 fuel ejected from the main gas nozzle 211 is enhanced, the temperature of the generated micro-carbon particles is increased, and a higher radiation heat flux is generated in the burning flame, so that the flame has a higher temperature and blackness, thereby improving the radiation capacity and brightness of the flame of the glow flame burner.

[0033] Compared with the prior art, the glow flame generation method of the glow flame burner of the present invention is that the mixed gas nozzle pre-generates a pyrolysis flame 310 surrounding the outer periphery of the main gas nozzle 211, forming a pyrolysis heating zone 12 with high temperature and oxygen deficiency on the inner side, so that the main gas 212 ejected from the main gas nozzle 211 produces high-temperature carbon particles under the action of pyrolysis, and can generate a high-radiation capacity and bright glow flame 210 when mixed with the combustion-supporting gas, thereby improving the thermal radiation performance and thermal interaction efficiency of the burner and achieving good economic benefits.

[0034] See also Figure 1and Figure 2 In one embodiment, part of the gas 330 transported by the main gas channel 21 is ejected through the flame-stabilizing gas nozzle 22, mixed with part of the combustion-supporting gas ejected from the main air channel 32, and then flows to the premixed gas nozzle 311 through the reflux structure 41 of the burner body 1 for combustion; through such an arrangement, the premixed gas nozzle 311 is continuously provided with gas mixed with combustion-supporting gas, ensuring that the premixed gas nozzle 311 can be continuously ignited, and the flames of the premixed gas nozzle 311 and the main gas nozzle 211 are stabilized.

[0035] See also Figure 1 and Figure 3 In one embodiment, guide baffles 4 are provided on both sides of the outer side of the burner body 1 along the gas delivery direction, and the guide baffles 4 are closed and arranged around the outer periphery of the burner body 1, and the inner angle formed between the guide baffles 4 and the burner body 1 is the reflux structure 41; through such an arrangement, the guide baffles 4 on the outer side of the burner body 1 play a role in guiding the flame of the burner, and cooperate with the upper surface of the burner body 1 to guide the gas mixed with the combustion-supporting gas to the premixed gas nozzle 311, thereby providing continuous ignition conditions for the premixed gas nozzle 311.

[0036] In one embodiment, part of the gas 330 transported by the main gas channel 21 flows to the premixed gas channel 31 through the branch channel 24; by such a configuration, the content of the gas transported by the premixed gas channel 31 is ensured, and the premixed gas nozzle 311 can be continuously ignited, thereby stabilizing the flame of the premixed gas nozzle 311.

[0037] Embodiment 2:

[0038] See also Figures 1 to 6The main purpose of this embodiment is to provide a glow burner using a glow flame generating method of a glow burner of the embodiment, comprising a burner body 1, an igniter and a flame monitor, the igniter and the flame monitor are respectively installed in the accessory assembly hole 11 of the burner body 1, the burner body 1, the burner body 1 comprises a gas delivery part 2 and an air delivery part 3 arranged around the outside of the gas delivery part 2, the gas delivery part 2 is provided with a main gas channel 21, the main gas channel 21 is used to deliver the main gas 212, the air delivery part 3 is provided with a premixed gas channel 31 and a main air channel 32; the main gas channel A main gas nozzle 211 is provided along one side of the gas outflow channel 21, and the premixed gas channel 31 is arranged outside the main gas channel 21, and is used to transport the gas mixed with the combustion-supporting gas, and the premixed gas nozzle 311 is arranged around the outside of the main gas nozzle 211, and the premixed gas nozzle 311 is used to generate a pyrolysis flame 310 for pyrolyzing the main gas 212 ejected through the main gas nozzle 211, and the main air channel 32 is arranged outside the premixed gas channel 31, and is provided with a main air nozzle 321, which is used to mix and burn the transported combustion-supporting gas 330 with the main gas 212 after pyrolysis to form a combustion flame.

[0039] Compared with the prior art, in the glow flame burner of the present invention, the mixed gas nozzle pre-generates a pyrolysis flame 310 surrounding the outer periphery of the main gas nozzle 211, forming a pyrolysis heating zone 12 with high temperature and oxygen-deficient inside, so that the main gas 212 ejected from the main gas nozzle 211 produces high-temperature carbon particles under the action of pyrolysis, and can produce a high-radiation capacity and bright glow flame 210 when mixed with the combustion-supporting gas, thereby improving the thermal radiation performance and thermal interaction efficiency of the burner and achieving good economic benefits.

[0040] See also Figures 1 to 3 In one embodiment, the premixed gas channel 31 is arranged along the gas delivery direction of the main gas channel 21, and a plurality of premixed gas channels 31 are arranged in a ring around the main gas channel 21, and a plurality of premixed gas nozzles 311 are arranged one-to-one with the premixed gas channel 31; through such an arrangement; the premixed gas nozzles 311 are arranged in a ring around the main gas nozzles 211, and the generated high-temperature pyrolysis flames 310 wrap around the main gas 212, isolating the surrounding air, forming a high-temperature oxygen-deficient environment, and providing sufficient heat for the pyrolysis zone of the main gas 212.

[0041] See also Figure 1 and Figure 3In one embodiment, the gas delivery part 2 is provided with a plurality of flame-stabilizing gas nozzles 22 connected to the main gas channel 21 at intervals on the outer periphery of the main gas nozzle 211, and the flame-stabilizing gas nozzles 22 are arranged obliquely toward the main air channel 32, and preferably have a radial angle A of 10 to 60° with the axis of the burner body 1, and the gas delivered by the flame-stabilizing gas nozzles 22 accounts for 5 to 40% of the total gas volume, and the burner body 1 is provided with a reflux structure 4 for mixing the gas ejected from the flame-stabilizing gas nozzles 22 with the combustion-supporting gas ejected from part of the main air channel 32 and then guiding the mixture to the premixed gas nozzle 311 1, a guide baffle 4 is provided on one side of the outer side of the burner body 1 along the gas delivery direction, and the guide baffle 4 is closed and arranged around the outer periphery of the burner body 1, and the inner angle formed between the guide baffle 4 and the burner body 1 is the reflux structure 41; through such an arrangement, the premixed gas nozzle 311 is continuously provided with gas mixed with combustion-supporting gas, ensuring that the premixed gas nozzle 311 can be continuously ignited, and the flames of the premixed gas nozzle 311 and the main gas nozzle 211 are stabilized, and the guide baffle 4 plays a guiding role on the ejected main gas 212 and the combustion-supporting gas, thereby improving the range of the burner flame.

[0042] See also Figures 1 to 3 In one embodiment, the outer end of the gas delivery part 2 extends out of the outside of the air delivery part 3, and the connection between the gas delivery part 2 and the air delivery part 3 is designed as an inclined surface 23. The flame-stabilizing gas nozzle 22 is arranged on the inclined surface 23 to achieve the flame-stabilizing gas nozzle 22 being arranged obliquely toward the main air passage 32. A plurality of premixed gas nozzles 311 are arranged at intervals on the outer periphery of the main gas nozzle 211, and a plurality of flame-stabilizing gas nozzles 22 are arranged inside the premixed gas nozzle 311 and are arranged staggered with the premixed gas nozzle 311 in the radial direction; through such an arrangement, the flame-stabilizing gas nozzle 22 is arranged on the side close to the main gas passage 21, and the structure is compact and reasonable, and at the same time, it is convenient for the gas ejected from the flame-stabilizing gas nozzle 22 to pass through the gap between adjacent premixed gas nozzles 311 and mix with the combustion-supporting gas on the outside.

[0043] See also Figure 1 In one embodiment, the main gas channel 21 is provided with a branch channel 24 connected to the premixed gas channel 31, and part of the gas 330 transported by the main gas channel 21 flows to the premixed gas channel 31 through the branch channel 24; through such a configuration, the content of the gas transported by the premixed gas channel 31 is guaranteed, the premixed gas nozzle 311 can be continuously ignited, and the flame of the premixed gas nozzle 311 is stabilized.

[0044] See also Figure 1 and Figure 2In one embodiment, a plurality of main gas nozzles 211 are provided and arranged in an annular shape. The radial angle between the annularly arranged main gas nozzles 211 and the axis of the burner body 1 is 0 to 45 degrees, so that the annularly arranged main gas nozzles 211 can realize parallel jet airflow or outwardly expanded jet airflow. The main gas 212 transported by the main gas channel 21 accounts for 40 to 80% of the total gas volume. By such an arrangement, the main gas nozzles 211 can evenly eject the main gas 212 in the pyrolysis environment, and the pyrolysis effect is good.

[0045] See also Figure 1 and Figure 3 In one embodiment, the premixed gas channel 31 transports 8 to 30% of the total gas, and the premixed gas nozzle 311 can be arranged so that the radial angle B with the axis of the burner body 1 is 0 to 15°, and the circumferential angle with the axis of the burner body 1 is 0 to 25°.

[0046] See also Figure 2 In one embodiment, the main air channel 32 is arranged along the gas delivery direction of the main gas channel 21, and a plurality of main air channels 32 are arranged in a ring shape with the main gas channel 21 as the center. A plurality of main air nozzles 321 are arranged one-to-one with the main air channel 32, and the combustion-supporting gas 330 delivered by the main air channel 32 accounts for 50 to 92% of the total amount of the combustion-supporting gas. The radial angle C between the main air nozzle 321 and the axis of the burner body 1 is 0 to 30°, and the circumferential angle between the main air nozzle 321 and the axis of the burner body 1 is 0 to 45°.

[0047] See also Figure 1 and Figure 3 In one embodiment, the air delivery part 3 is provided with a plurality of flame-stabilizing air nozzles 33 located at the periphery of the premixed gas nozzle 311, and the flame-stabilizing air nozzles 33 are used to provide part of the combustion-supporting gas, and the combustion-supporting gas delivered by the flame-stabilizing air nozzles 33 accounts for 0 to 20% of the total combustion-supporting gas. The radial angle between the flame-stabilizing air nozzles 33 and the axis of the burner body 1 is 0 to ±30°, and the circumferential angle between the flame-stabilizing air nozzles 33 and the axis of the burner body 1 is 0 to 30°. Through such an arrangement, sufficient oxygen combustion-supporting gas is provided in the burner to achieve the effect of optimizing flame stabilization.

[0048] See also Figures 1 to 6In one embodiment, the premixed gas channel 31 can be arranged at a certain solid angle so that the combined cylindrical flame presents a contraction, expansion or rotation lamp shape. The cross-sectional structure of the premixed gas channel 31 is usually circular, and can also be elliptical, semicircular or rectangular. The premixed gas channel 31 includes an inlet section 312, a mixing section 313 and an expansion section 314 along the gas delivery direction; the inner diameter of the inlet section 312 is the same or gradually narrows along the gas delivery direction, and its end is the same as the inner diameter of the connection end of the mixing section 313; the inner diameter of the mixing section 313 is the same along the gas delivery direction, and its end is smaller than the inner diameter of the connection end with the expansion section 314; the inner diameter of the expansion section 314 is the same or gradually widens along the gas delivery direction.

[0049] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A method for generating a glow flame of a glow flame burner, characterized in that: The following steps are involved: a. The premixed gas channel of the burner body transports the gas mixed with the combustion-supporting gas, which is ejected through the premixed gas nozzle and generates a pyrolysis flame around the periphery of the main gas nozzle; b. The gas transported by the main gas channel of the burner body is ejected through the main gas nozzle and produces carbon particles under the pyrolysis action of the pyrolysis flame; c. The combustion-supporting gas transported by the main air channel of the burner body is ejected through the main combustion air nozzle, mixed with the main combustion gas after pyrolysis and burned to form a combustion flame.

2. The method for generating a glow flame of a glow flame burner according to claim 1, characterized in that: Part of the gas transported by the main gas channel is ejected through the flame stabilizing gas nozzle, mixed with part of the combustion-supporting gas ejected from the main air channel, and then flows to the premixing gas nozzle through the reflux structure of the burner body for combustion.

3. The method for generating a glow flame of a glow flame burner according to claim 1, characterized in that: Part of the gas transported by the main gas channel flows to the premixed gas channel through the branch channel.

4. A glow burner using the glow flame generation method of a glow burner according to any one of claims 1 to 3, characterized in that: The burner body comprises a burner body and an igniter, wherein the burner body is provided with a main gas channel, a premixed gas channel and a main air channel; the main gas channel is provided with a main gas nozzle along a side where the gas flows out, the premixed gas channel is arranged outside the main gas channel, and is used for conveying gas mixed with combustion-supporting gas, and the premixed gas nozzle is arranged around the outside of the main gas nozzle, the premixed gas nozzle is used for generating a pyrolysis flame for pyrolyzing the main gas ejected through the main gas nozzle, and the main air channel is arranged outside the premixed gas channel, and the conveyed combustion-supporting gas is mixed with the pyrolyzed main gas for combustion to form a combustion flame.

5. The glow flame burner according to claim 4, characterized in that: The premixed gas channel is arranged along the gas delivery direction of the main gas channel, a plurality of premixed gas channels are provided in a ring around the main gas channel, and a plurality of premixed gas nozzles are provided one-to-one with the premixed gas channels.

6. The glow flame burner according to claim 4, characterized in that: The burner body is provided with a plurality of flame-stabilizing gas nozzles connected to the main gas channel at intervals located on the periphery of the main gas nozzle, and the flame-stabilizing gas nozzles are arranged inclined toward one side of the main air channel. The burner body is provided with a reflux structure for mixing the gas sprayed through the flame-stabilizing gas nozzles with part of the combustion-supporting gas sprayed from the main air channel and then guiding the mixture to the premixed gas nozzle.

7. The glow flame burner according to claim 6, characterized in that: A plurality of premixed gas nozzles are arranged at intervals on the outer periphery of the main gas nozzle, and a plurality of flame stabilizing gas nozzles are arranged inside the premixed gas nozzles and staggered with the premixed gas nozzles in the radial direction.

8. The glow flame burner according to claim 4, characterized in that: The main gas nozzles are provided in plurality and arranged in a ring shape.

9. The glow flame burner according to claim 4, characterized in that: The burner body is provided with a plurality of flame-stabilizing air nozzles at the periphery of the premixed gas nozzle, and the flame-stabilizing air nozzles are used to provide part of the combustion-supporting gas.

10. The glow flame burner according to any one of claims 5 to 9, characterized in that: A flow guide baffle is provided on one side of the outer side of the burner body along the gas delivery direction, and the flow guide baffle is arranged in a closed shape around the outer periphery of the burner body.

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