Gas distribution structure and combustor

Abstract

The utility model belongs to the technical field of combustors, and particularly discloses a gas distribution structure and a combustor. The gas distributing structure comprises a gas distributing part, a fixing part and a gas distributing pipeline. A plurality of gas flow channels are formed in the gas distribution part; a combustion-supporting gas chamber is defined by the fixing part and the gas distribution part and communicates with one end of the gas flow channel, and the other end of the gas flow channel is used for communicating with the combustion chamber. The fuel gas branch pipelines and the gas flow channels are arranged in a one-to-one correspondence mode, the ends, provided with fuel gas outlets, of the fuel gas branch pipelines penetrate through the fixing part and the combustion-supporting gas cavity to stretch into the corresponding gas flow channels, and combustion-supporting gas flow channels allowing combustion-supporting gas to circulate are defined by the outer peripheral walls of the fuel gas branch pipelines and the inner peripheral walls of the gas flow channels. According to the gas distribution structure, the safety performance of the combustor can be improved, the mixing uniformity of the fuel gas and the combustion-supporting gas is good, and the combustion effect of the combustor is improved.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a gas distribution structure and burner. Background Technology

[0002] Currently, porous media burners are divided into premixed burners and non-premixed burners. Premixed burners mix air and fuel gas in a mixing chamber before they enter the combustion zone, and the mixture is ignited upon entry. Because the mixture is flammable and explosive at high temperatures, a thick layer of insulation material is needed to prevent backfire. This increases the size and weight of the burner, hindering power output and maintenance, and still carries a significant risk of backfire. Non-premixed burners introduce air and fuel gas separately into the combustion zone, which can lead to uneven mixing. This results in some fuel gas not being completely burned and being discharged with the flue gas, failing to achieve the expected thermal efficiency and causing fuel waste. Furthermore, incomplete combustion generates large amounts of carbon monoxide, polluting the environment.

[0003] Therefore, there is an urgent need to propose a gas distribution structure and burner to solve the above-mentioned technical problems. Utility Model Content

[0004] According to one aspect of the present invention, the present invention provides a gas distribution structure that can introduce gas and auxiliary gas separately into the combustion chamber and then mix them, or can mix gas and auxiliary gas in a short space near the combustion chamber before entering the combustion chamber, thereby improving the safety performance of the burner and providing better uniformity of gas and auxiliary gas mixing, thus improving the combustion effect of the burner.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The gas distribution structure includes:

[0007] The gas distribution section is provided with multiple gas flow channels;

[0008] The fixed part, together with the gas distribution part, forms a combustion chamber, the combustion chamber is connected to one end of the gas flow channel, and the other end of the gas flow channel is used to connect to the combustion chamber;

[0009] A gas distribution pipe is provided, corresponding to the gas flow channel. One end of the gas distribution pipe with a gas outlet passes through the fixing part and the gas-supporting chamber and extends into the corresponding gas flow channel. The outer peripheral wall of the gas distribution pipe and the inner peripheral wall of the gas flow channel form a gas-supporting flow channel for the flow of gas.

[0010] Optionally, the distance between the end of the gas flow channel that communicates with the combustion chamber and the end of the gas distribution pipe that has the gas outlet is 0mm-10mm.

[0011] Optionally, the gas flow channel is coaxially arranged with the gas distribution pipe.

[0012] Optionally, multiple gas channels are arranged in an array on the gas distribution section.

[0013] Optionally, the gas distribution structure further includes a gas distribution block, which has at least one channel penetrating its two opposite sides. The channel includes a main body and air inlets located at both ends of the main body. The main body is the combustion chamber, the portion of the gas distribution block above the combustion chamber is the gas distribution part, and the portion of the gas distribution block below the combustion chamber is the fixing part.

[0014] Optionally, the gas distribution block has a cuboid structure, and each pair of oppositely arranged sides of the cuboid structure is penetrated by one of the channels.

[0015] Optionally, the gas distribution part is a gas distribution plate, the fixing part is a fixing plate, and a pad is provided between the gas distribution plate and the fixing plate, the pad forming the combustion-supporting chamber between the gas distribution plate and the fixing plate.

[0016] Optionally, multiple pads are provided, and the multiple pads are spaced apart circumferentially along the air distribution plate, with fastening connectors passing through the air distribution plate, the pads, and the fixing plate.

[0017] According to another aspect of this utility model, a burner is also provided, comprising a first housing, wherein a gas inlet chamber, a gas distribution structure installation chamber, and a combustion chamber are arranged sequentially from bottom to top within the first housing; the gas distribution structure installation chamber is used to install the gas distribution structure described in any of the above technical solutions, one end of the gas distribution pipe of the gas distribution structure having a gas inlet is connected to the gas inlet chamber, and the other end of the gas flow channel of the gas distribution structure is connected to the combustion chamber; the first housing is also provided with an opening through which combustion-supporting gas enters the combustion-supporting gas chamber of the gas distribution structure.

[0018] Optionally, the burner further includes a second housing, which is fitted outside the first housing and forms a combustion-supporting gas inlet chamber with the side and bottom surfaces of the first housing. The combustion-supporting gas in the combustion-supporting gas inlet chamber can enter the combustion-supporting gas chamber through the opening.

[0019] Optionally, the outer casing of the combustion chamber is provided with an isolation cover, and there is a first gap between the isolation cover and the side wall of the first housing. There is a second gap between the gas distribution structure and the side wall of the first housing that communicates with the first gap. The second gap communicates with the combustion chamber. The opening is disposed opposite to the isolation cover. The combustion gas in the combustion chamber enters the first gap through the opening and enters the combustion chamber through the second gap.

[0020] Optionally, the burner further includes:

[0021] A gas delivery pipe is connected to the inlet at the bottom of the gas intake chamber;

[0022] A combustion-supporting gas delivery pipe is sleeved outside the combustion-supporting gas delivery pipe and connected to the inlet at the bottom of the combustion-supporting gas inlet chamber.

[0023] Optionally, the combustion chamber is provided with a perforated plate, and the gas flowing out of the gas channel enters the perforated plate.

[0024] Optionally, the porous plate has a groove on the side near the gas distribution structure, and the groove and the gas distribution structure form an airflow buffer zone. The fuel gas and the combustion-supporting fuel gas are mixed in the airflow buffer zone and then enter the porous plate.

[0025] The beneficial effects of this utility model are:

[0026] This invention provides a gas distribution structure, including a gas distribution section, a fixing section, and a gas distribution pipe. By controlling the length of the gas distribution pipe, this structure can introduce the auxiliary combustion gas and the natural gas separately into the combustion chamber for mixing, or mix the auxiliary combustion gas and the natural gas in a shorter gas flow channel near the combustion chamber before entering the combustion chamber. This ensures that the auxiliary combustion gas and the natural gas do not premix or have a very short premixing distance before entering the combustion chamber, effectively reducing the risk of backfire caused by a large amount of premixed gas and improving the safety performance of the burner.

[0027] Because the auxiliary gas flow channel and the gas distribution pipes are independent of each other, the flow of auxiliary gas and gas does not affect each other. At the same time, the outer periphery of each gas distribution pipe is covered by the auxiliary gas flow channel. Therefore, it is convenient to control the ratio of auxiliary gas and gas according to the flow area of ​​auxiliary gas and gas, so as to further improve the completeness of gas combustion.

[0028] By setting up a combustion-supporting gas flow channel around the gas distribution pipe, the combustion-supporting gas can coat the outer periphery of the gas when it is injected, making the mixture of combustion-supporting gas and gas more uniform, improving the combustion efficiency of the burner, avoiding gas waste, reducing carbon monoxide production, and helping to protect the environment.

[0029] By utilizing the "ejection" principle, the negative pressure generated by the gas flow draws the oxidizing gas from the oxidizing gas chamber into the oxidizing gas flow channel formed by the gas distribution pipe and the gas flow channel, thus distributing an appropriate amount of oxidizing gas into the gas. On the one hand, this accelerates the flow rate of the oxidizing gas; on the other hand, it causes the oxidizing gas to move closer to the gas at the gas outlet of the gas distribution pipe, forming turbulence, which helps to fully mix the oxidizing gas and the gas.

[0030] This invention also provides a burner, including a first housing and the aforementioned gas distribution structure. Due to the adoption of the aforementioned gas distribution structure, this burner exhibits superior combustion performance and safety, while reducing fuel costs and pollution. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the gas distribution structure provided in Embodiment 1 of this utility model;

[0033] Figure 2 This is a cross-sectional view of the gas distribution structure provided in Embodiment 1 of this utility model;

[0034] Figure 3 for Figure 2 Enlarged view at point A;

[0035] Figure 4 This is a schematic diagram of the gas distribution structure provided in Embodiment 2 of the present invention.

[0036] Figure 5 This is a cross-sectional view of the gas distribution structure provided in Embodiment 2 of this utility model;

[0037] Figure 6 for Figure 5 Enlarged view at point B;

[0038] Figure 7 A cross-sectional view of a burner provided in Embodiment 3 of this utility model (using the gas distribution structure of Embodiment 1);

[0039] Figure 8 A cross-sectional view of another burner provided in Embodiment 3 of this utility model (using the gas distribution structure of Embodiment 2).

[0040] In the picture:

[0041] 10. First housing; 11. Gas inlet chamber; 12. Opening; 13. Gas distribution plate; 20. Second housing; 21. Combustion-supporting gas inlet chamber; 30. Isolation cover; 40. First gap; 50. Second gap; 60. Perforated plate; 61. Groove; 62. Combustion component; 70. Gas delivery pipe; 80. Combustion-supporting gas delivery pipe; 90. Fixing component;

[0042] 100. Gas distribution block; 101. Channel; 110. Gas distribution section; 111. Gas flow channel; 1111. Combustion-supporting flow channel; 120. Fixing part; 130. Combustion-supporting chamber;

[0043] 200. Gas branch pipeline;

[0044] 300. Spacer block. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0046] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0049] Example 1

[0050] This embodiment provides a gas distribution structure that can separate the gas and auxiliary gas into multiple fine gas streams, which are then introduced into the combustion chamber separately and mixed rapidly. Alternatively, it can allow the gas and auxiliary gas to mix in a short space near the combustion chamber before entering the combustion chamber, thereby improving the safety performance of the burner. Furthermore, the mixing uniformity of the gas and auxiliary gas is better, which improves the combustion effect of the burner.

[0051] Specifically, such as Figures 1-3 As shown, the gas distribution structure includes a gas distribution section 110, a fixing section 120, and a gas distribution pipe 200. The gas distribution section 110 has multiple gas flow channels 111. The fixing section 120 and the gas distribution section 110 form a combustion-supporting chamber 130, which is connected to one end of each gas flow channel 111. The other end of each gas flow channel 111 is connected to a combustion chamber. Each gas distribution pipe 200 corresponds to one of the gas flow channels 111. One end of each gas distribution pipe 200 with a gas outlet passes through the fixing section 120 and the combustion-supporting chamber 130 and extends into its corresponding gas flow channel 111. The outer peripheral wall of the gas distribution pipe 200 and the inner peripheral wall of the gas flow channel 111 form a combustion-supporting flow channel 1111 for the flow of combustion-supporting gas.

[0052] In use, the gas distribution structure delivers gas through the gas distribution pipe 200. The auxiliary gas in the combustion chamber 130 is drawn into the combustion channel 1111 under the negative pressure generated by the gas flow in the gas distribution pipe 200. When the height of the gas outlet of the gas pipe is greater than or equal to the height of the outlet of the end of the gas channel 111 that connects to the combustion chamber, the gas and auxiliary gas are introduced into the combustion chamber separately and then mixed. This design ensures that the gas and auxiliary gas are not premixed before entering the combustion chamber for combustion, effectively avoiding the risk of backfire caused by the presence of premixed gas. It is suitable for gases with a high degree of danger, such as hydrogen.

[0053] When the height of the gas outlet of the gas pipeline is lower than the height of the outlet at the end of the gas flow channel 111 that connects to the combustion chamber (e.g.) Figure 2 and Figure 3As shown, the combustion gas and the oxidizing gas mix in the gas flow channel 111 near the combustion chamber before entering the combustion chamber. This design ensures that the premixing distance between the combustion gas and the oxidizing gas before combustion in the combustion chamber is extremely short, effectively reducing the risk of backfire caused by the presence of a large amount of premixed gas and improving the safety performance of the burner. This structure is suitable for low-risk gases such as methane.

[0054] Since the combustion-supporting gas flow channel 1111 and the gas distribution pipe 200 are independent of each other, the flow of combustion-supporting gas and gas before mixing does not affect each other. At the same time, the outer periphery of each gas distribution pipe 200 is covered by the combustion-supporting gas flow channel 1111. Therefore, it is convenient to control the ratio of combustion-supporting gas to gas based on the flow area of ​​combustion-supporting gas and gas, so as to further improve the completeness of gas combustion.

[0055] By setting the combustion-supporting gas flow channel 1111 around the gas distribution pipe 200, when the combustion-supporting gas and the gas are sprayed out, the combustion-supporting gas covers the outer periphery of the gas, making the combustion-supporting gas and the gas mix more evenly, improving the combustion effect of the burner, avoiding gas waste and reducing carbon monoxide production, which is beneficial to environmental protection.

[0056] By utilizing the "ejection" principle, the negative pressure generated by the gas flow draws the oxidizing gas from the oxidizing gas chamber 130 into the oxidizing gas flow channel 1111, which is formed by the gas distribution pipe 200 and the gas flow channel 111. This introduces an appropriate amount of oxidizing gas into the gas flow channel. On the one hand, this accelerates the flow rate of the oxidizing gas; on the other hand, it causes the oxidizing gas to move closer to the gas at the gas outlet of the gas distribution pipe 200, forming turbulence, which helps to fully mix the oxidizing gas and the gas.

[0057] Optionally, in this embodiment, the fixing part 120 is provided with through holes corresponding to the gas branch pipes 200, and the gas branch pipes 200 are sealed through their corresponding through holes. Fixing the gas branch pipes 200 through the through holes is a simple structure and easy to assemble.

[0058] Optionally, the gas distribution pipe 200 can be sealed by interference fit with the through hole or by welding, depending on the actual needs.

[0059] Optionally, in one possible embodiment, the combustion-supporting flow channel 1111 is an annular channel.

[0060] Optionally, in other possible embodiments, the gas-supporting flow channel 1111 may also be a plurality of spaced channels, which can be set according to actual needs. For example, a plurality of recesses may be formed on the inner peripheral wall of the gas flow channel 111, with the recesses spaced apart circumferentially along the gas flow channel 111. The gas distribution pipe 200 and the plurality of recesses form a plurality of spaced channels, in which the gas-supporting combustion gas moves.

[0061] Optionally, see [link to relevant documentation] Figure 3 The distance h1 between the end of the gas flow channel 111 that connects to the combustion chamber and the end of the gas distribution pipe 200 that has a gas outlet is 0mm-10mm. This arrangement ensures that the gas and auxiliary gas are not premixed or have a short premixing space, further reducing the risk of backfire.

[0062] It is understandable that when h1 = 0 mm, the fuel gas and the combustion-supporting fuel gas will be introduced into the combustion chamber separately and then mixed; when 0 mm < h1 < 10 mm, the fuel gas and the combustion-supporting fuel gas will be mixed in a small section of the gas flow channel 111 near the combustion chamber before entering the combustion chamber.

[0063] Alternatively, in one embodiment, the air-fuel ratio can be adjusted by designing the ratio between the area of ​​the gas outlet and the cross-sectional area of ​​the combustion-supporting gas flow channel 1111.

[0064] Alternatively, in another embodiment, the ratio of gas and auxiliary gas can be controlled by separately controlling the flow rates of the gas and auxiliary gas. For example, a first proportional valve is provided on the gas delivery pipe for supplying gas to multiple gas branch pipes 200, and a second proportional valve is provided on the auxiliary gas delivery pipe for supplying auxiliary gas to the auxiliary gas chamber 130. The flow rates of the gas and auxiliary gas are adjusted by regulating the opening degrees of the first and second proportional valves.

[0065] In other embodiments, based on the ratio of the area of ​​the gas outlet to the cross-sectional area of ​​the auxiliary gas flow channel 1111, the aforementioned first proportional valve and second proportional valve can be additionally set to jointly control the ratio of gas to auxiliary gas.

[0066] Further, see also Figure 3 In this embodiment, the gas flow channel 111 and the gas distribution pipe 200 are coaxially arranged, so that the amount of auxiliary gas surrounding the gas is the same, further improving the mixing uniformity of the auxiliary gas and the gas.

[0067] Optionally, multiple gas flow channels 111 can be arranged in an array on the gas distribution section 110, correspondingly, such as Figure 1 As shown, multiple gas distribution pipes 200 are also arranged in an array on the fixing part 120. This arrangement helps to improve the uniformity of gas supply to the combustion chamber by the gas distribution structure.

[0068] In one possible embodiment, the array of multiple gas channels 111 is arranged in the form of multiple gas channel rows arranged sequentially. Each gas channel row includes multiple gas channels 111 spaced apart. The gas channels 111 in two adjacent gas channel rows can be arranged in a one-to-one correspondence or staggered arrangement, depending on actual needs.

[0069] Further, see also Figure 1 In this embodiment, the gas distribution structure further includes a gas distribution block 100. The gas distribution block 100 has at least one channel 101 extending through its two opposite sides. The channel 101 includes a main body and air inlets at both ends of the main body. The main body of the channel 101 is a combustion chamber 130. The portion of the gas distribution block 100 above the combustion chamber 130 is a gas distribution section 110, and the portion of the gas distribution block 100 below the combustion chamber 130 is a fixing section 120. With this configuration, the gas distribution section 110 and the fixing section 120 are an integral structure, resulting in high structural stability and fewer components in the gas distribution structure, facilitating its processing and assembly.

[0070] Optionally, see [link to relevant documentation] Figure 1 The gas distribution block 100 can be in the form of a cuboid structure, with a channel 101 running through each pair of opposite sides of the cuboid structure. This arrangement can increase the air intake area of ​​the combustion chamber 130 and facilitate the increase of the overall volume of the combustion chamber 130.

[0071] Example 2

[0072] This embodiment provides a gas distribution structure, which is largely the same as that of Embodiment 1, with improvements only. Therefore, only the differences between the two are described here, and the structures identical to those in Embodiment 1 will not be repeated. In this embodiment, the same or corresponding technical features as in Embodiment 1 are referred to by the same reference numerals.

[0073] Specifically, such as Figures 4-6 As shown, in this embodiment, the gas distribution section 110 is a gas distribution plate, and the fixing section 120 is a fixing plate. A spacer 300 is provided between the gas distribution plate and the fixing plate, and the spacer 300 forms a combustion-supporting chamber 130 between the gas distribution plate and the fixing plate. This arrangement allows the gas distribution structure to be processed separately, which is beneficial to improving production efficiency. The gas distribution plate and the fixing plate forming the combustion-supporting chamber 130 by the spacer 300 have a simple structure, low cost, and are easy to assemble.

[0074] Furthermore, multiple spacers 300 can be provided, spaced apart circumferentially along the gas distribution plate, with fastening connectors passing through the gas distribution plate, spacers 300, and fixing plate. By providing multiple spacers 300, the stability of the spacing between the gas distribution plate and the fixing plate can be improved, as can the stability of the combustion chamber. Connecting the gas distribution plate, spacers 300, and fixing plate together with fastening connectors reduces the number of components in the gas distribution structure compared to separate connection structures between the gas distribution plate and the fixing plate, or between the spacers 300 and the gas distribution plate and the fixing plate, thus facilitating assembly and processing of the gas distribution structure.

[0075] Alternatively, the fastening connection can be a bolt and nut assembly.

[0076] Alternatively, the spacer 300 can be made with nuts, which is less expensive and requires no additional processing.

[0077] Example 3

[0078] like Figure 7 and Figure 8 As shown, this embodiment provides a burner, including a first housing 10 and a gas distribution structure provided in Embodiment 1 or Embodiment 2. Due to the adoption of the aforementioned gas distribution structure, this burner exhibits superior combustion performance and safety, while reducing fuel costs and pollution.

[0079] Specifically, the first housing 10 contains, from bottom to top, a gas inlet chamber 11, a gas distribution structure installation chamber, and a combustion chamber. The gas distribution structure installation chamber is used to install the aforementioned gas distribution structure. Specifically, one end of the gas distribution pipe 200 of the gas distribution structure, having a gas inlet, is connected to the gas inlet chamber 11, and the other end of the gas flow channel 111 of the gas distribution structure is connected to the combustion chamber. The first housing 10 is also provided with an opening 12, through which the combustion-supporting gas enters the combustion-supporting gas chamber 130 of the gas distribution structure.

[0080] When the burner is in use, the gas required for combustion is delivered to the gas inlet chamber 11, and then enters multiple gas distribution pipes 200 connected to it, and finally enters the combustion chamber through the gas flow channel 111. The combustion-supporting gas required for combustion is delivered to the combustion-supporting gas chamber 130 through the opening 12, and then enters the combustion chamber through the combustion-supporting gas flow channel 1111 to mix with the gas and burn together.

[0081] Further, see also Figure 7 and Figure 8 The burner also includes a second housing 20, which is fitted outside the first housing 10 and forms a combustion-supporting gas inlet chamber 21 with the sides and bottom of the first housing 10. The combustion-supporting gas in the combustion-supporting gas inlet chamber 21 can enter the combustion-supporting gas chamber 130 through the opening 12. By setting the second housing 20 and forming the combustion-supporting gas inlet chamber 21 that surrounds the first housing 10, on the one hand, the low-temperature combustion-supporting gas can cool the second housing 20 and the inside of the burner, preventing the burner temperature from becoming too high and achieving the effect of heat insulation and preventing backfire. Therefore, the alumina heat insulation layer in the prior art can be eliminated, and the volume and weight of the burner can be reduced, or the combustion area can be increased while keeping the volume of the gasifier unchanged, thereby improving the combustion power of the burner. On the other hand, the heat exchange between the burner and the combustion-supporting gas has a preheating effect on the combustion-supporting gas, so that the combustion-supporting gas and the gas have a certain base temperature after mixing, making it easier to ignite and decompose, which is conducive to the complete combustion of the gas.

[0082] Optionally, see [link to relevant documentation] Figure 7 and Figure 8 In this embodiment, the outer casing of the combustion chamber is provided with an isolation cover 30. A first gap 40 exists between the isolation cover 30 and the side wall of the first housing 10. A second gap 50, communicating with the first gap 40, exists between the gas distribution structure and the side wall of the first housing 10. The second gap 50 communicates with the combustion-supporting chamber 130. An opening 12 is positioned opposite the isolation cover 30. The combustion-supporting gas in the combustion-supporting inlet chamber 21 enters the first gap 40 through the opening 12 and then passes through the second gap 50 into the combustion-supporting chamber 130. This arrangement increases the flow path of the combustion-supporting gas, improves the heat exchange area between the combustion-supporting gas and the burner, and thus enhances the cooling effect of the combustion-supporting gas on the burner.

[0083] Further, see also Figure 7 and Figure 8 A gas distribution plate 13 can be installed inside the gas intake chamber 11, located between the inlet of the gas intake chamber 11 and the gas distribution pipe 200. When gas enters the gas intake chamber 11 through the inlet, it is blocked by the gas distribution plate 13, causing the gas to diffuse into the gap between the gas distribution plate 13 and the gas intake chamber 11. This allows the gas to flow along the side wall of the gas intake chamber 11 after entering, thus ensuring that the gas is evenly distributed throughout the gas intake chamber 11 and preventing the gas from directly rushing into the gas distribution pipe 200, thereby improving the combustion stability of the burner.

[0084] Further, see also Figure 7 and Figure 8 The combustion chamber is equipped with a perforated plate 60. Gas flowing out of the gas channel 111 enters the perforated plate 60 and is ignited on the surface of the perforated plate 60. Furthermore, after the combustion-supporting gas and the fuel gas enter the perforated plate 60, they are further dispersed by the pores in the perforated plate 60, which is conducive to the full mixing and combustion of the combustion-supporting gas and the fuel gas.

[0085] Optionally, see [link to relevant documentation] Figure 7 and Figure 8 The perforated plate 60 has a groove 61 on the side near the gas distribution structure. The groove 61 and the gas distribution structure form an airflow buffer zone. The fuel gas and the auxiliary fuel gas mix in the airflow buffer zone before entering the perforated plate 60. This arrangement allows the fuel gas and the auxiliary fuel gas to be reorganized in the airflow buffer zone before entering the perforated plate 60. On the one hand, it can reduce the resistance of the airflow entering the perforated plate 60 and accelerate the gas flow rate; on the other hand, it can ensure that the fuel gas and the auxiliary fuel gas are fully mixed.

[0086] Optionally, see [link to relevant documentation] Figure 8In one possible embodiment, a combustion element 62 may be provided on the perforated plate 60. The combustion-supporting gas and the combustion gas are further mixed in the perforated plate 60 and then burned in the combustion element 62. Compared with a burner that uses a long-distance jet flame, the flame burning in the combustion element 62 can reduce the distance between the heated object and the combustion surface, thereby reducing the burn-off and oxidation of the heated object by the flame.

[0087] Optionally, see [link to relevant documentation] Figure 7 and Figure 8 The inner peripheral wall of the isolation cover 30 is provided with a fixing member 90. The fixing member 90 is used to fix the combustion element 62. The combustion element 62 can abut against the fixing member 90 on all sides.

[0088] Optionally, the combustion element 62 can be a porous foam ceramic plate, a mesh ceramic plate, or a multi-layered interwoven metal wire mesh, etc.

[0089] Optionally, the combustion element 62 can be an infrared combustion plate, which can maintain the temperature of the combustion surface above 800°C, or even reach 1200°C. Without the installation of a heat insulation layer, the cooling scheme of using the combustion-supporting air intake chamber 21 to wrap the first housing 10 can keep the temperature of the second housing 20 stable at 38°C-40°C, with a low risk of backfire.

[0090] Further, see also Figure 7 and Figure 8 The burner also includes a gas delivery pipe 70 and an auxiliary gas delivery pipe 80. The gas delivery pipe 70 is connected to the inlet at the bottom of the gas inlet chamber 11. The auxiliary gas delivery pipe 80 is fitted outside the gas delivery pipe 70 and is connected to the inlet at the bottom of the auxiliary gas inlet chamber 21. This configuration results in a simple structure and facilitates assembly.

[0091] Optionally, in this embodiment, the inlet of the gas-supporting gas delivery pipe 80 is located on its side.

[0092] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A gas-distribution structure, characterized in that, include: Gas distribution section (110), wherein the gas distribution section (110) is provided with multiple gas flow channels (111); The fixed part (120) and the gas distribution part (110) form a combustion chamber (130), the combustion chamber (130) is connected to one end of the gas flow channel (111), and the other end of the gas flow channel (111) is used to connect to the combustion chamber; A gas distribution pipe (200) is provided in a one-to-one correspondence with the gas flow channel (111). One end of the gas distribution pipe (200) with a gas outlet passes through the fixing part (120) and the gas-supporting chamber (130) and extends into the corresponding gas flow channel (111). The outer peripheral wall of the gas distribution pipe (200) and the inner peripheral wall of the gas flow channel (111) form a gas-supporting flow channel (1111) for the flow of gas.

2. The gas distribution structure according to claim 1, characterized in that, The distance between the end of the gas flow channel (111) that communicates with the combustion chamber and the end of the gas distribution pipe (200) that has the gas outlet is 0mm-10mm.

3. The gas distribution structure according to claim 1, characterized in that, The gas flow channel (111) is coaxially arranged with the gas distribution pipe (200).

4. The gas distribution structure according to claim 1, characterized in that, Multiple gas flow channels (111) are arranged in an array on the gas distribution section (110).

5. The gas distribution structure according to any one of claims 1-4, characterized in that, The gas distribution structure further includes a gas distribution block (100), which has at least one channel (101) penetrating its two opposite sides. The channel (101) includes a main body and air inlets located at both ends of the main body. The main body is the combustion chamber (130). The portion of the gas distribution block (100) above the combustion chamber (130) is the gas distribution part (110), and the portion of the gas distribution block (100) below the combustion chamber (130) is the fixing part (120).

6. The gas distribution structure according to claim 5, characterized in that, The gas distribution block (100) has a cuboid structure, and each pair of oppositely arranged sides of the cuboid structure is penetrated by a channel (101).

7. The gas distribution structure according to any one of claims 1-4, characterized in that, The gas distribution section (110) is a gas distribution plate, the fixing section (120) is a fixing plate, and a pad (300) is provided between the gas distribution plate and the fixing plate. The pad (300) makes the gas distribution plate and the fixing plate form the combustion-supporting chamber (130).

8. The gas distribution structure according to claim 7, characterized in that, Multiple pads (300) are provided, and the multiple pads (300) are spaced apart along the circumference of the air distribution plate. Fastening connectors are inserted through the air distribution plate, the pads (300) and the fixing plate.

9. A burner, characterized in that, The first housing (10) includes a gas inlet chamber (11), a gas distribution structure installation chamber, and a combustion chamber arranged sequentially from bottom to top within the first housing (10); the gas distribution structure installation chamber is used to install the gas distribution structure as described in any one of claims 1-8; one end of the gas distribution pipe (200) of the gas distribution structure has a gas inlet and is connected to the gas inlet chamber (11); the other end of the gas flow channel (111) of the gas distribution structure is connected to the combustion chamber; the first housing (10) is also provided with an opening (12), through which the combustion gas enters the combustion gas chamber (130) of the gas distribution structure.

10. The burner according to claim 9, characterized in that, The burner also includes a second housing (20), which is fitted outside the first housing (10) and forms a combustion-supporting gas inlet chamber (21) with the side and bottom surfaces of the first housing (10). The combustion-supporting gas in the combustion-supporting gas inlet chamber (21) can enter the combustion-supporting gas chamber (130) through the opening (12).

11. The burner according to claim 10, characterized in that, The outer cover of the combustion chamber is provided with an isolation cover (30). The isolation cover (30) has a first gap (40) between itself and the side wall of the first housing (10). The gas distribution structure has a second gap (50) between itself and the side wall of the first housing (10), which communicates with the first gap (40). The second gap (50) communicates with the combustion chamber (130). The opening (12) is arranged opposite to the isolation cover (30). The combustion gas in the combustion chamber (21) enters the first gap (40) through the opening (12) and enters the combustion chamber (130) through the second gap (50).

12. The burner according to claim 10, characterized in that, The burner also includes: The gas delivery pipe (70) is connected to the inlet at the bottom of the gas inlet chamber (11); A gas-supporting gas delivery pipe (80) is sleeved outside the gas delivery pipe (70) and connected to the inlet at the bottom of the gas-supporting gas inlet chamber (21).

13. The burner according to any one of claims 9-12, characterized in that, The combustion chamber is provided with a perforated plate (60), and the gas flowing out of the gas channel (111) enters the perforated plate (60).

14. The burner according to claim 13, characterized in that, The porous plate (60) has a groove (61) on the side near the gas distribution structure. The groove (61) and the gas distribution structure form an airflow buffer zone. The fuel gas and the auxiliary fuel gas are mixed in the airflow buffer zone and then enter the porous plate (60).

Images