TW201821732A - Combustion engine structure wherein the damage of the combustion engine structure due to the high temperature combustion process being too close to the combustion engine structure is avoided - Google Patents

Abstract

The present invention relates to a combustion engine structure comprising a pipe, an inner shell and an outer shell. The pipe is provided with a first gas passage. The inner shell is annularly arranged in the pipe, and the first gas passage is arranged between the inner shell and the pipe. The outer shell is annularly arranged in the inner shell, and a second gas passage is arranged between the outer shell and the inner shell. A gas flow layer is formed around a channel port of a first gas channel by utilizing a low-temperature first gas, so that a high-temperature second gas cannot be directly mixed into a mixed gas discharged from the first gas passage, and the second gas and the mixed gas can start to mix only after being outwards discharged for a certain distance. Therefore, the oxidation rate of fuel can be reduced, so that the use amount of the fuel is reduced. In addition, the damage of the combustion engine structure due to the high temperature combustion process being too close to the combustion engine structure is avoided.

Description

Burner structure

The present invention relates to a burner structure, particularly a burner structure that reduces the rate of combustion oxidation.

Regenerative combustion technology uses ceramic materials as a heat exchange medium to recover the thermal energy of the high-temperature smoker after combustion and use it to heat the air required for combustion. Due to the high heat storage capacity of ceramic materials, the combustion air can be preheated to over 800 degrees Celsius. Therefore, the stable area of the flame is enlarged, which helps to improve the stability of the flame. In addition, the regenerative combustion technology uses an alternating combustion method. This alternating combustion method can not only promote the uniformity of the heat flow field in the heating furnace, but also Significantly increase the average heat flux in the heating furnace and achieve high efficiency heat transfer purposes. Therefore, the thermal storage combustion technology has the characteristics of improving combustion thermal efficiency, saving fuel consumption and miniaturizing equipment volume.

At present, the conventional combustion device uses a metal burner. The combustion air is ignited after being mixed with the fuel. Due to the low temperature of the combustion air and the low oxygen content of the exhaust gas after combustion, the burner has no overheating or high temperature oxidation problems. After the introduction of the thermal storage combustion system, due to the high temperature of the combustion air and the high oxygen content, it is easy to produce severe ultra-high temperature (above 2000K) combustion. And the burner mostly burns in a cavity or a nozzle, but after long-term use, because the combustion works inside or near the burner body, the high temperature has a certain effect on the burner's own mechanism, which may cause the burner to be damaged. Or the combustion effect is not good, which will cause the life of the burner to decrease.

In addition, in order to make the fuel and the combustion air more easily mix together, the combustion engine often makes the combustion air flow in an irregular manner, so that when it is added to the fuel, it can be more evenly mixed in the combustion air, but it will indirectly affect it. When the mixed fuel and combustion air are ignited and combusted, due to the irregular flow of the airflow, the combustion position will be different and unstable.

In addition, most regenerative burners require that the temperature of the burner body rise to a certain high temperature before the regenerative combustion can be activated, and low-temperature combustion air cannot be directly used.

It is an object of the present invention to provide a structure of a burner, which can stabilize the air flow discharged from the burner and keep the combustion condition in a stable state.

One object of the present invention is to provide a burner structure that can control the ignition combustion position of the burner away from the burner body to avoid the high temperature of the combustion from affecting the burner.

An object of the present invention is to provide a burner structure that reduces the oxidation rate of fuel and saves fuel.

The invention relates to a burner structure, which includes a pipe, a first fuel pipe, a laminar flow guide, an ignition, an inner shell and an outer shell. The tube includes a casing and a first gas passage. A first gas passage is disposed inside the casing, a first fuel pipe is passed through the first gas passage, a laminar flow guide has a plurality of air flow passages, and the laminar flow guide is sleeved on the pipe and is located in the first One side of a fuel outlet of a fuel pipe. The cyclone disc has a plurality of through holes, and the cyclone disc is disposed in the first gas passage; the laminar flow guide has a plurality of air flow passages, and the laminar flow guide corresponds to a discharge port of the fuel pipe; the ignition part is provided One side of the laminar flow guide, and the side is located outside the first gas passage. The inner shell ring is arranged on the outer side of the pipe, and a second gas channel is provided between the inner shell and the pipe. The outer shell is arranged on the outer side of the inner shell, and a third gas channel is provided between the outer shell and the inner shell.

The invention provides an embodiment, which discloses that the pipe fitting further includes a cyclone plate having a plurality of through holes, the cyclone plate is arranged in the first gas passage; wherein the first fuel pipe piece passes through the cyclone plate.

The invention provides an embodiment, which discloses that each of the through holes of the cyclone disk has an included angle of 40 degrees to 50 degrees with respect to the direction of the first gas passage path.

The invention provides an embodiment, which discloses the burner structure according to item 2 of the scope of the patent application, wherein the laminar flow guide, the casing and the cyclone are surrounded by a gas-material mixing section.

The present invention provides an embodiment which discloses that the length of the inner diameter of each of the airflow channels is smaller than the length of each of the airflow channels.

The invention provides an embodiment, which discloses that the laminar flow guide is disposed in the first gas passage, and one end of the laminar flow guide is flush with a passage opening of the first gas passage.

The present invention provides an embodiment, which discloses that the materials of the inner shell and the outer shell are 預鑄 refractory material or ceramic material.

The present invention provides an embodiment, which discloses that the pipe fitting further includes a plurality of second fuel pipe fittings, the plurality of second fuel pipe fittings pass through the first gas passage, and are looped around the first fuel pipe fittings, wherein the laminar flow guide The first fuel pipe and the plurality of second fuel pipes are sleeved on one side, and are located at one side of the plurality of discharge ports of the plurality of second fuel pipes.

The present invention provides an embodiment, wherein the first fuel pipe has a plurality of discharge ports, the plurality of discharge ports are opened at the periphery of the first fuel pipe, and the plurality of discharge ports are located outside the first gas passage .

The present invention provides an embodiment in which the first fuel pipe discharges a first fuel, the plurality of second fuel pipes discharge a second fuel, and a discharge direction of the first fuel is different from a discharge direction of the second fuel. .

The present invention provides an embodiment in which the laminar flow guide is more connected to the first fuel pipe, and the opening direction of the laminar flow guide corresponding to the first gas passage is different from that of the laminar flow guide corresponding to the first The opening direction of the fuel pipe.

The present invention provides an embodiment in which the laminar flow guide is further provided with a convex member, which is located on the outer side of the laminar flow guide, and a discharge port is provided on one side of the convex member, and the discharge port communicates with the first A fuel pipe.

The invention provides an embodiment in which the tube is located inside the casing, and the casing and the laminar flow guide surround a gas-material mixing portion.

The invention provides an embodiment, which discloses that the laminar flow guide is more connected to the first fuel pipe, and the opening direction of the laminar flow guide corresponding to the first gas passage is different from that of the laminar flow guide corresponding to the first fuel. The opening direction of the pipe.

The present invention provides an embodiment that discloses a first gas channel. The present invention provides an embodiment that discloses that the second gas channel discharges a first gas, the third gas channel discharges a second gas, and the first The temperature of one gas is lower than the temperature of the second gas.

In order to have a further understanding and understanding of the features of the present invention and the effects achieved, we would like to provide a better embodiment and a detailed description with the following description:

Please refer to the first diagram and the second diagram, which are schematic diagrams and sectional views of the structure of the burner of the present invention. As shown in the figure, this embodiment provides a burner structure 1 that can be used to introduce cold air (low-temperature air) or hot air (high-temperature air) as combustion air, mix the combustion air and fuel, and then perform ignition combustion. The burner structure 1 includes a pipe member 10, a first fuel pipe member 130, a laminar flow guide member 140, an ignition member 150, an inner shell 20 and an outer shell 30. The pipe member 10 has a casing 102 and a first gas passage 110. The inner shell 20 is annularly arranged outside the pipe member 10, and a second gas passage 210 is provided between the inner shell 20 and the pipe member 10. The outer shell 30 is annularly arranged on the outer side of the inner shell 20, and a third gas passage 310 is provided between the outer shell 30 and the inner shell 20. The material of the inner shell 20 is ceramic.

In this embodiment, the combustor structure 1 forms a thin gas wall through the gas discharged from the second gas channel 210, and the gas thin wall prevents the gas discharged from the third gas channel 310 from directly mixing with the gas discharged from the first gas channel 110 The gas mixture of the second gas passage 210 will become weaker after a certain distance from the burner structure, so that the gas of the third gas passage 310 can be mixed with the gas mixture. In this way, the combustion position of the mixed gas can be relatively far from the burner structure 1, so as to improve the service life of the burner structure 1.

A cyclone plate 120 has a plurality of through holes 121 and is disposed in the first gas passage 110. The penetration direction of each of the through holes 121 is at an included angle of 40 degrees to 50 degrees with respect to the channel path direction of the first gas channel 110. The first fuel pipe member 130 passes through the cyclone plate 120 such that one discharge port 131 of the first fuel pipe member 130 is disposed on one side of the cyclone plate 120. The laminar flow guide 140 has a plurality of air flow channels 141. The length of the inner diameter of each of the airflow passages 141 is smaller than the length of the passage of each of the airflow passages 141. The laminar flow guide 140 is sleeved on the pipe 10. In this embodiment, the laminar flow guide 140 is disposed in the first gas passage 110 and is located on one side of a discharge port 131 of the first fuel pipe 130. And corresponding to the discharge opening 131 of the first fuel pipe 130. The laminar flow guide 140, the casing 102, and the cyclone disc 120 are surrounded by a gas-material mixing portion M1. The ignition element 150 is disposed on a side of the laminar flow guide 140. One end of the laminar flow guide 140 is flush with one of the passage openings 111 of the first gas passage 110. In this way, the ignition position of the gas-fuel mixture can be positioned outside, so as to prevent the combustion position from being too close to the burner structure 1 and burning. The high temperature affects the structure of the burner1.

Please refer to the third figure, which is a schematic cross-sectional view of the process of guiding the air flow of the burner of the present invention. As shown in the figure, during the combustion process of the combustor structure 1 of this embodiment, the internal temperature of the pipe fittings 10 of the combustor structure 1 is lower than 650 degrees, so the heat storage device cannot be activated for thermal storage combustion. Therefore, low-temperature air (that is, low-temperature combustion-supporting air) is first introduced into the first gas passage 110 and passes through the through holes 121 of the cyclone disc 120. Since the through holes 121 are inclined channels, the low-temperature air passes through and appears. Vortex airflow. The discharge port 131 of the first fuel pipe 130 simultaneously outputs fuel. Due to the flow mode of the low-temperature air stream, the fuel can be more quickly doped with low-temperature air in the gas-material mixing section, and mixed to form a gas-fuel mixed gas A0.

Furthermore, the air-fuel mixture gas A0 (that is, the mixture of fuel and low-temperature air) passes through the airflow channels 141 of the laminar flow guide 140. The cross-sectional areas of the airflow channels 141 are small (ie, the inner diameter is short), and the airflow channels 141 have long channel paths. The airflow of the air-fuel mixture gas A0 is squeezed when entering the airflow channels 141. After the air-fuel mixture gas A0 can be discharged along the path of the air flow channels 141 (that is, the channel opening 111 of the first gas passage 110 is discharged), the air-fuel mixture gas A0 exhibits a stable airflow state. At this time, the igniter 150 ignites to promote combustion of the gas-fuel mixture A0.

Further, the channel opening 111 of the first gas channel 110 discharges the gas-fuel mixture gas A0. The second gas passage 210 discharges a first gas A1, and the first gas A1 is general room-temperature air introduced from the outside of the burner structure 1. The third gas passage 310 discharges a second gas A2, and the second gas A2 is high-temperature air that is introduced into the heat storage device inside the burner structure, and the high-temperature air is high-temperature air (ie, high-temperature combustion air) at about 800 degrees Celsius. The temperature of the first gas A1 (that is, ordinary room-temperature air) is lower than the temperature of the second gas A2 (that is, high-temperature air passing through the heat storage device).

In this embodiment, the first gas A1 discharged from the second gas channel 210 forms a thin air flow around the channel opening 111 of the first gas channel 110. The second gas A2 discharged from the third gas passage 310. Because the second gas A2 is affected by the thin wall formed by the first gas A1, it cannot be directly mixed with the gas-fuel mixture gas A0. When the first gas A1 is separated from the second gas channel 210 by a certain distance, the gas flow of the first gas A1 discharged by the first gas A1 is weak, so that the second gas A2 of the third gas channel 310 can be mixed with the gas mixture gas A0, and further Through the influence of the high temperature of the second gas A2, the high temperature combustion of the air-fuel mixture is caused. In this way, the combustion position where the second gas A2 is mixed with the gas-fuel mixture gas A0 can be controlled, and this combustion position is far from the burner structure 1 to avoid damage to the burner structure 1 caused by high temperature.

In addition, when the internal temperature of the pipe fittings 10 of the burner structure 1 is higher than 650 degrees, a heat storage device is activated for heat storage combustion. The subsequent use of the burner structure 1 is the same as that described in the previous embodiment, so it will not be repeated here.

This embodiment is aimed at improving the shortcomings of the conventional technology. The conventional technology relates to the fact that the regenerative burner cannot be used in a furnace at a low temperature, and cannot use cold air for thermal storage combustion. And it is known that after the burner is used for a long time, the combustion position will be too close to the burner, which will affect the function of the burner. Therefore, this embodiment provides a burner, which includes a tube 10, an inner shell 20 and an outer shell 30. The first gas A1 discharged from the second gas channel 210 forms a thin gas wall, and the gas thin wall prevents the second gas A2 discharged from the third gas channel 310 from directly mixing with the gas-material mixed gas A0 discharged from the first gas channel 10. The second gas A2 must be a certain distance from the burner structure 1 before the second gas A2 can be mixed with the gas-fuel mixture gas A0. In this way, its combustion position is far away from the burner structure 1, and the burner structure 1 is prevented from being damaged due to high temperature. Moreover, because the fuel is mixed with cold air first, a gas-fuel mixture gas A0 is formed. Then in the subsequent combustion process, a second gas A2 (that is, high-temperature combustion-supporting air) is mixed in, which can reduce the oxidation rate of the fuel and save fuel. In addition, the air-fuel mixture gas A0 passes through the airflow channels 141 of the laminar flow guide 140 to change the airflow path, so that the airflow shows a stable state, so the combustion situation is also in a stable state.

Please refer to FIG. 4A and FIG. 4B together, which are schematic structural diagrams of two air flow channels of the laminar flow guide of the burner. As shown in the figure, in this embodiment, the combustor structure 1 further includes a plurality of baffles 1411. The baffles 1411 are staggered in the first gas passage 110 of the pipe 10 to form the air flow passages 141. . In addition, the combustor structure 1 may also include a closure member 1412 having a plurality of through channels 1413 to form the airflow channels 141. In this way, the present embodiment has multiple variations of the air flow channels 141, and the effect is that the air flow can be smoothly discharged to the channel opening 111 of the first gas channel 110.

Please refer to the fifth figure, which is a sectional view of the structure of the burner according to the second embodiment of the present invention. As shown in the figure, this embodiment provides a burner structure 1 which can be used to introduce cold air (low-temperature air) and fuel, and then ignite the fire 1 through the igniter 150 (as shown in FIG. 6B), or introduce After the hot air (high temperature air) is mixed with the cold air (low temperature air) and the fuel, the diffused fireworks fire 2 is ignited by the hot air (as shown in Figure 7B). The burner structure 1 includes a pipe member 10, a first fuel pipe member 130, a laminar flow guide member 140, an ignition member 150, an inner shell 22, and an outer shell 32. The pipe 10 is provided with a housing 102, and a first gas passage 110 is passed through the housing 102. In this embodiment, a gas conduit 16 is further used to introduce the first gas A1 to the first gas passage 110 (as shown in FIG. 6A). As shown).

In the first gas passage 110 of this embodiment, the first fuel pipe 130 is penetrated, and a plurality of second fuel pipes 132 are further penetrated, and the first fuel pipe 130 and the second fuel are sheathed by the laminar flow guide 140. The pipe pieces 132, the first fuel pipe pieces 130, and the second fuel pipe pieces 132 are used to output the first fuel f1 and the second fuel f2, respectively. In this embodiment, the first fuel pipe piece 130 has a plurality of discharge ports 131a. The discharge opening is opened at the periphery of the first fuel pipe 130, so the first fuel f1 can be emitted toward the side (as shown in FIG. 6A), and faces the inner side wall 102a of the casing 102 of the pipe 10. The inner shell 22 is annularly arranged on the outside of the pipe member 10, and a second gas passage 210 is provided between the inner shell 22 and the pipe member 10 to output the first gas A1. The outer shell 32 is annularly arranged outside the inner shell 22, and a third gas passage 310 is provided between the outer shell 32 and the inner shell 22 to output the second gas A2. The materials of the inner shell 22 and the outer shell 32 of this embodiment may be made of 預鑄 refractory material or ceramic material. The first fuel f1 and the second fuel f2 may be fuels with the same ignition point or different ignition points.

Please refer to FIG. 6A and FIG. 6B together. In one embodiment of the present embodiment, the burner structure 1 is in a high fire mode, and the pipe 10 introduces the first gas A1 from the gas pipe 16. A gas passage 110 outputs the first gas A1 and passes the laminar flow guide 140 and the first fuel pipe 112 outputs the first fuel f1. A plurality of discharge openings of the first fuel pipe 130 are provided at the periphery of the first fuel pipe 130. The first fuel f1 is emitted in a radial direction, so it is easier for the first fuel f1 to mix with the first gas A1 to form a mixed gas, and the mixed gas is ignited by the igniter 150 so that the combustor structure 1 outputs a large fire fire1. In this way, the combustion position of the mixed gas can be concentrated, so as to improve the use efficiency of the burner structure 1. In addition, in this embodiment, the inner side wall 102 a of the end of the housing 102 (ie, the passage opening 111 of the first gas passage) is protruded from an outer side surface 140 s of one of the laminar flow guides 140. The side wall 102a and an outer side surface 140s of the laminar flow guide 140 form a gas-material mixing portion M2. As shown in FIG. 6A, the first fuel f1 and the first gas A1 are mixed in the gas-material mixing portion M2, and then ignited. Piece 150 ignites, thus providing a large fire fire1.

Please refer to FIG. 7A and FIG. 7B together. In another embodiment of this embodiment, the combustor structure 1 is in the diffuse flame mode, so the second fuel pipe 132 of the pipe 10 outputs the second fuel f2, and The second gas channel 210 outputs the first gas A1, and the third gas channel 310 outputs the second gas A2. The temperature of the second gas A2 is greater than the temperature of the first gas A1, that is, the second gas A2 belongs to hot air, and the first The gas A1 belongs to the cold wind. The burner structure 1 discharges the first gas A1 through the second gas passage 210 to form a thin wall of the gas. The gas thin wall prevents the second gas A2 discharged from the third gas passage 310 from directly mixing with the second fuel pipe 132 After outputting the second fuel f2, the first gas A1 discharged from the second gas channel 210 will weaken after a certain distance from the burner structure 1, so that the first gas A1 and the second gas A2 can mix the second fuel. f2.

In addition, the second fuel pipe 132, the second gas channel 210, and the third gas channel 310 are all direct emission gases, and the first gas A1 discharged from the second gas channel 210 will form a wind, so the second gas A2 is avoided. After leaving the third gas passage 310, it is in contact with the second fuel f2, so the first gas A1, the second gas A2, and the second fuel f2 are farther away from the burner structure 1, and form a diffused fireworks fire2, so that the mixed gas The combustion position is more diffused to improve the use efficiency of the combustor structure 1 in the state of diffusing fuel, and the first gas A1, the second gas A2, and the second fuel f2 are farther away from the combustor structure 1, which can avoid high temperature caused burner structure 1 damage. In addition, the pipe 10 can stop outputting the first gas A1. The first gas A1 enters the second gas channel 210 through the first gas inlet 212, and the second gas A2 enters the third gas channel 310 through the second gas inlet 312.

From the above, it can be seen that the first fuel f1 and the second fuel f2 have different emission directions. The first fuel f1 is emitted in a radial direction and the second fuel f2 is emitted in a straight line. The position is different, but different forms of fuel flames are formed.

In summary, the present invention provides a burner structure that can be used for low-temperature combustion air or high-temperature combustion air mixed with fuel for ignition combustion. If the fuel is mixed with low-temperature combustion-supporting air first, and then in the subsequent combustion process, high-temperature combustion-supporting air is mixed, so that the oxidation rate of the fuel can be reduced and the fuel can be saved. In addition, the combustor structure controls the gas flow through the laminar flow guide, and the gas can flow out in a regular manner, so that the airflow shows a stable state, and the airflow exiting the channel port is stable, so the combustion situation is also in a stable state. In addition, the first gas discharged from the first gas channel forms a thin gas wall, and the gas thin wall prevents the second gas discharged from the second gas channel from being directly mixed with the gas-fuel mixture gas discharged from the first gas channel. After the second gas has to be a distance from the structure of the burner, the air flow of the first gas discharged from the first gas channel is weak. Only the second gas can be mixed with the gas mixture. In this way, its combustion position is far away from the structure of the burner, and the structure of the burner is prevented from being damaged by the high temperature.

1‧‧‧burner structure

10‧‧‧Pipe Fittings

102‧‧‧shell

102a‧‧‧inner wall

110‧‧‧first gas channel

111‧‧‧passage

120‧‧‧ Cyclone

121‧‧‧through hole

130‧‧‧first fuel pipe

131‧‧‧ discharge port

131a‧‧‧Discharge port

132‧‧‧Second fuel pipe

140‧‧‧ Laminar Flow Channel

140s‧‧‧ Outside

141‧‧‧airflow channel

1411‧‧‧ Bezel

1412‧‧‧ Closure

1413‧‧‧through passage

150‧‧‧Ignition

16‧‧‧Gas duct

20‧‧‧Inner shell

22‧‧‧Inner shell

210‧‧‧second gas channel

212‧‧‧Second gas inlet

30‧‧‧ shell

32‧‧‧ shell

310‧‧‧Third gas channel

312‧‧‧Third gas inlet

A0‧‧‧Gas mixture

A1‧‧‧First gas

A2‧‧‧Second gas

f1‧‧‧first fuel

f2‧‧‧Second fuel

M1‧‧‧Gas Mixing Department

M2‧‧‧Gas Mixing Department

First diagram: It is a schematic diagram of the structure of the burner of the present invention; Second diagram: It is a sectional view of the structure of the burner of the present invention; FIG. 4A is a schematic diagram of a flow path structure of a laminar flow guide of the burner of the present invention; FIG. 4B is a schematic diagram of a flow path structure of another laminar flow guide of the burner of the present invention; Figure: It is a schematic diagram of the structure of the burner of the present invention; Figure 6A: It is a schematic cross-sectional view of another process of guiding the air flow of the burner of the present invention; Figure 6B: It is a schematic view of the burner of Figure 6A Sectional schematic diagram of the process of guiding the airflow and exhaust combustion; Figure 7A: It is a schematic sectional view of the process of guiding the airflow of the burner of the invention; and Figure 7B: Guiding flow of the combustor in Figure 7A and Schematic cross-section of exhaust combustion.

Claims (13)

A burner structure includes: a pipe member, the pipe member comprising: a housing; and a first gas passage provided inside the housing; a first fuel pipe provided through the first gas passage; A laminar flow guide having a plurality of air flow channels, the laminar flow guide is sleeved on the pipe, and is located on one side of a discharge opening of the first fuel pipe; an ignition member is provided on the laminar flow guide One side, and the side is located outside the first gas passage; an inner shell, the ring of which is located outside the pipe, a second gas passage between the inner shell and the pipe, and an outer shell, the ring A third gas channel is arranged between the outer shell and the inner shell. The burner structure according to item 1 of the scope of the patent application, further comprising: a cyclone plate having a plurality of through holes, the cyclone plate is provided in the first gas passage; wherein the first fuel pipe is provided with the cyclone plate. The burner structure according to item 2 of the scope of the patent application, wherein each of the through holes of the cyclone disk has an included angle of 40 degrees to 50 degrees with respect to the path direction of the first gas passage. The burner structure according to item 2 of the scope of the patent application, wherein the laminar flow guide, the casing and the cyclone are surrounded by a gas-material mixing section. The burner structure according to item 1 of the scope of the patent application, wherein the inner diameter of each of the airflow channels of the laminar flow guide is smaller than the length of each of the airflow channels. The burner structure according to item 1 of the patent application scope, wherein the laminar flow guide is disposed in the first gas passage, and one end of the laminar flow guide is flush with a passage opening of the first gas passage. The burner structure according to item 1 of the scope of the patent application, wherein the material of the inner shell and the outer shell is 預鑄 refractory material or ceramic material. According to the burner structure described in item 1 of the scope of patent application, the pipe fittings further include: a plurality of second fuel pipe fittings, the plurality of second fuel pipe fittings passing through the first gas passage, and looping around the first fuel pipe fittings, Wherein, the laminar flow guide covers the first fuel pipe and the plurality of second fuel pipes, and is located at one side of the plurality of discharge ports of the plurality of second fuel pipes. The burner structure described in item 8 of the scope of patent application, wherein the first fuel pipe has a plurality of discharge ports, the plurality of discharge ports are opened at the periphery of the first fuel pipe, and the plurality of discharge ports are located in the first Outside of a gas channel. The burner structure according to item 8 or 9 of the scope of patent application, wherein the first fuel pipe discharges a first fuel, and the plurality of second fuel pipes discharge a second fuel, respectively, and the discharge direction of the first fuel is different from The discharge direction of the second fuel. The burner structure according to item 8 or 9 of the scope of the patent application, wherein an outer side surface of the laminar flow guide and an inner side wall of the end of the casing are surrounded by a gas-material mixing portion. The burner structure according to item 1 of the patent application scope, wherein the laminar flow guide is more connected to the first fuel pipe, and the opening direction of the laminar flow guide corresponding to the first gas passage is different from the laminar flow guide. Corresponds to the opening direction of the first fuel pipe. The burner structure according to item 1 of the scope of the patent application, wherein the second gas channel discharges a first gas, the third gas channel discharges a second gas, and the temperature of the first gas is lower than that of the second gas. temperature.