Gas distribution structure and combustor

Abstract

The invention relates 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] The present invention relates to the technical field of burners, and in particular to a gas distribution structure and a burner. Background Art

[0002] At present, porous media burners are divided into premixed burners and non-premixed burners. Premixed burners refer to burners in which air and gas are mixed in a mixing chamber before entering the combustion area, and the mixed gas is ignited when it enters the combustion area. Since the mixed gas is flammable and explosive in a high-temperature environment, in order to prevent flashback, it is necessary to wrap a thicker thermal insulation material on the outside of the mixing chamber, which will increase the size and weight of the burner, which is not conducive to improving the power and maintenance of the burner, and there is still a large risk of flashback. Non-premixed burners refer to burners in which air and gas are introduced into the combustion area separately, which is prone to uneven mixing of gas and air, so that part of the gas cannot be completely burned and is discharged with the smoke, making it difficult to achieve the expected thermal efficiency, resulting in gas waste; in addition, incomplete combustion will also cause a large amount of carbon monoxide to be generated, polluting the environment.

[0003] Therefore, it is urgent to propose a gas distribution structure and a burner to solve the above technical problems. Summary of the invention

[0004] According to one aspect of the present invention, the present invention provides a gas separation structure, which can introduce the fuel gas and the combustion-supporting gas into the combustion chamber separately and then mix them, or can mix the fuel gas and the combustion-supporting gas in a shorter space close to the combustion chamber and then enter the combustion chamber, thereby improving the safety performance of the burner, and the mixing uniformity of the fuel gas and the combustion-supporting gas is better, thereby improving the combustion effect of the burner.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The gas distribution structure includes:

[0007] A gas separation portion, wherein a plurality of gas flow channels are provided on the gas separation portion;

[0008] The fixing part and the gas dividing part enclose a combustion-supporting gas chamber, the combustion-supporting gas chamber is connected with one end of the gas flow channel, and the other end of the gas flow channel is used to communicate with the combustion chamber;

[0009] A gas branch pipe is arranged in one-to-one correspondence with the gas flow channel, and one end of the gas branch pipe has a gas outlet, which passes through the fixed part and the combustion-supporting gas chamber and extends into the corresponding gas flow channel, and the outer peripheral wall of the gas branch pipe and the inner peripheral wall of the gas flow channel form a combustion-supporting gas flow channel for the circulation of the combustion-supporting gas.

[0010] Optionally, the distance between one end of the gas flow channel communicating with the combustion chamber and one end of the gas branch pipe having the gas outlet is 0 mm-10 mm.

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

[0012] Optionally, a plurality of the gas flow channels are arranged in an array on the gas separation portion.

[0013] Optionally, the gas separation structure also includes a gas separation block, the gas separation block is provided with at least one channel running through two opposite side surfaces thereof, the channel includes a main body and air inlets located at both ends of the main body, the main body is the combustion-supporting gas chamber, the portion of the gas separation block located above the combustion-supporting gas chamber is the gas separation portion, and the portion of the gas separation block located below the combustion-supporting gas chamber is the fixed portion.

[0014] Optionally, the gas distribution block is in a rectangular structure, and each pair of oppositely disposed side surfaces of the rectangular structure is penetrated by one of the channels.

[0015] Optionally, the gas separation part is a gas separation plate, the fixed part is a fixed plate, a cushion block is provided between the gas separation plate and the fixed plate, and the cushion block enables the gas separation plate and the fixed plate to enclose the combustion-supporting gas chamber.

[0016] Optionally, a plurality of the cushion blocks are provided, and the plurality of the cushion blocks are arranged at intervals along the circumference of the air distribution plate, and fastening connectors are passed through the air distribution plate, the cushion blocks and the fixing plate.

[0017] According to another aspect of the present invention, the present invention also provides a burner, including a first shell, in which a gas intake chamber, a gas separation structure installation chamber and a combustion chamber are arranged in sequence from bottom to top; the gas separation structure installation chamber is used to install the gas separation structure described in any of the above technical solutions, and the gas distribution pipe of the gas separation structure has one end of a gas inlet connected to the gas intake chamber, and the other end of the gas flow channel of the gas separation structure is connected to the combustion chamber; the first shell is also provided with an opening, and the supporting combustion gas enters the supporting combustion gas chamber of the gas separation structure through the opening.

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

[0019] Optionally, the combustion chamber outer cover is provided with an isolation cover, a first gap is provided between the isolation cover and the side wall of the first shell, a second gap connected to the first gap is provided between the gas separation structure and the side wall of the first shell, the second gap is connected to the combustion-supporting gas chamber, the opening is arranged opposite to the isolation cover, the combustion-supporting gas in the combustion-supporting gas inlet chamber enters the first gap through the opening, and enters the combustion-supporting gas chamber through the second gap.

[0020] Optionally, the burner further comprises:

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

[0022] The auxiliary combustion gas delivery pipe is sleeved outside the auxiliary combustion gas delivery pipe and is communicated with the inlet at the bottom of the auxiliary combustion gas inlet chamber.

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

[0024] Optionally, a groove is provided on one side of the porous plate close to the gas separation structure, and the groove and the gas separation structure form an airflow buffer zone, and the fuel gas and the supporting gas are mixed in the airflow buffer zone and then enter the porous plate.

[0025] The beneficial effects of the present invention are:

[0026] The present invention provides a gas separation structure, comprising a gas separation part, a fixing part and a gas separation pipe. The gas separation structure can introduce the auxiliary gas and the gas into the combustion chamber separately and then mix them by controlling the length of the gas separation pipe, or can mix the auxiliary gas and the gas in a shorter gas flow channel close to the combustion chamber before entering the combustion chamber, so that the auxiliary gas and the gas are not premixed or the premixing distance is extremely short before entering the combustion chamber for combustion, which can effectively reduce the risk of flashback caused by the presence of a large amount of premixed gas and improve the safety performance of the burner.

[0027] Since the combustion-supporting gas flow channel and the gas branch pipe are independent of each other, the flows of the combustion-supporting gas and the gas do not affect each other. At the same time, the outer circumference of each gas branch pipe is covered with the combustion-supporting gas flow channel. Therefore, it is convenient to control the ratio of the combustion-supporting gas and the gas according to the flow area of ​​the combustion-supporting gas and the gas, so as to further improve the completeness of the gas combustion.

[0028] By setting up a combustion-supporting gas flow channel to wrap around the gas distribution pipeline, when the combustion-supporting gas and the fuel gas are sprayed out, the combustion-supporting gas can cover the outer periphery of the fuel gas, so that the combustion-supporting gas and the fuel gas are mixed more evenly, thereby improving the combustion effect of the burner, avoiding gas waste while also reducing the production of carbon monoxide, which is beneficial to protecting the environment.

[0029] Through the "injection" principle, the negative pressure generated by the gas flow is used to suck the supporting combustion gas from the supporting combustion gas chamber into the supporting combustion gas flow channel surrounded by the gas distribution pipe and the gas flow channel, and an appropriate amount of supporting combustion gas is added to the gas. On the one hand, the flow rate of the supporting combustion gas is accelerated; on the other hand, at the gas outlet of the gas distribution pipe, the supporting combustion gas moves closer to the fuel gas to form turbulence, which is conducive to the full mixing of the supporting combustion gas and the fuel gas.

[0030] The present invention also provides a burner, comprising a first shell and the above-mentioned gas separation structure. Due to the use of the above-mentioned gas separation structure, the burner has better combustion effect and combustion safety, and lower gas cost and pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of the gas separation structure provided in the first embodiment of the present invention;

[0032] Figure 2 A cross-sectional view of the gas separation structure provided in Embodiment 1 of the present invention;

[0033] Figure 3 for Figure 2 A magnified view at point A;

[0034] Figure 4 A schematic diagram of the gas separation structure provided in the second embodiment of the present invention

[0035] Figure 5 A cross-sectional view of the gas separation structure provided in the second embodiment of the present invention;

[0036] Figure 6 for Figure 5 Enlarged view at B;

[0037] Figure 7 A cross-sectional view of a burner provided in Embodiment 3 of the present invention (using the gas distribution structure of Embodiment 1);

[0038] Figure 8 A cross-sectional view of another burner provided in the third embodiment of the present invention (using the gas distribution structure of the second embodiment).

[0039] In the figure:

[0040] 10. First shell; 11. Gas inlet chamber; 12. Opening; 13. Gas distribution plate; 20. Second shell; 21. Combustion gas inlet chamber; 30. Isolation cover; 40. First gap; 50. Second gap; 60. Perforated plate; 61. Groove; 62. Combustion element; 70. Gas delivery pipe; 80. Combustion gas delivery pipe; 90. Fixing element;

[0041] 100, gas distribution block; 101, channel; 110, gas distribution part; 111, gas flow channel; 1111, combustion-supporting gas flow channel; 120, fixing part; 130, combustion-supporting gas chamber;

[0042] 200. Gas distribution pipeline;

[0043] 300. Pad. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] Embodiment 1

[0049] The present embodiment provides a gas separation structure, which can separate the fuel gas and the combustion-supporting gas into multiple small airflows, which are introduced into the combustion chamber separately and then quickly mixed, or can mix the fuel gas and the combustion-supporting gas in a short space close to the combustion chamber and then enter the combustion chamber, thereby improving the safety performance of the burner, and the mixing uniformity of the fuel gas and the combustion-supporting gas is better, thereby improving the combustion effect of the burner.

[0050] Specifically, Figure 1-Figure 3 As shown, the gas distribution structure includes a gas distribution part 110, a fixed part 120 and a gas distribution pipe 200. Among them, a plurality of gas flow channels 111 are provided on the gas distribution part 110. The fixed part 120 and the gas distribution part 110 enclose a combustion-supporting gas chamber 130, and the combustion-supporting gas chamber 130 is connected with one end of the gas flow channel 111, and the other end of the gas flow channel 111 is used to communicate with the combustion chamber. The gas distribution pipe 200 is arranged in a one-to-one correspondence with the gas flow channels 111, and one end of the gas distribution pipe 200 with a gas outlet passes through the fixed part 120 and the combustion-supporting gas chamber 130 and extends into the gas flow channel 111 corresponding thereto, and the outer peripheral wall of the gas distribution pipe 200 and the inner peripheral wall of the gas flow channel 111 enclose a combustion-supporting gas flow channel 1111 for the circulation of the combustion-supporting gas.

[0051] When the gas distribution structure is in use, the fuel gas is transported by the gas distribution pipe 200, and the supporting fuel gas in the supporting fuel gas chamber 130 will be sucked into the supporting fuel gas flow channel 1111 under the negative pressure generated by the flow of the gas 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 at one end of the gas flow channel 111 connected to the combustion chamber, the fuel gas and the supporting fuel gas will be separately introduced into the combustion chamber and then mixed. This arrangement can prevent the fuel gas and the supporting fuel gas from being premixed before they enter the combustion chamber for combustion, and can effectively avoid the risk of flashback caused by the presence of premixed gas. It is suitable for gases with a higher degree of danger, such as hydrogen.

[0052] When the height of the gas outlet of the gas pipeline is lower than the height of the outlet of the end of the gas flow channel 111 communicating with the combustion chamber (such as Figure 2 and Figure 3 As shown in FIG. 1 , the gas and the combustion-supporting gas are mixed in the gas flow channel 111 near the combustion chamber before entering the combustion chamber. This arrangement can shorten the premixing distance of the gas and the combustion-supporting gas before entering the combustion chamber for combustion, effectively reducing the risk of flashback caused by the presence of a large amount of premixed gas and improving the safety performance of the burner. This structure is suitable for gases with low risk, such as methane.

[0053] Since the auxiliary gas flow channel 1111 and the gas branch pipe 200 are independent of each other, the flows of the auxiliary gas and the gas do not affect each other before mixing. At the same time, the outer circumference of each gas branch pipe 200 is covered with the auxiliary gas flow channel 1111. Therefore, it is convenient to control the ratio of the auxiliary gas and the gas according to the flow area of ​​the auxiliary gas and the gas, so as to further improve the completeness of the gas combustion.

[0054] By setting the auxiliary gas flow channel 1111 to wrap around the gas branch pipe 200, when the auxiliary gas and the fuel gas are sprayed out, the auxiliary gas covers the outer periphery of the fuel gas, making the auxiliary gas and the fuel gas mixed more evenly, thereby improving the combustion effect of the burner, avoiding gas waste while also reducing the production of carbon monoxide, which is beneficial to environmental protection.

[0055] Through the "injection" principle, the negative pressure generated by the flow of gas is utilized to suck the supporting combustion gas from the supporting combustion gas chamber 130 into the supporting combustion gas flow channel 1111 formed by the gas branch pipe 200 and the gas flow channel 111, and an appropriate amount of supporting combustion gas is added to the gas. On the one hand, the flow rate of the supporting combustion gas is accelerated; on the other hand, at the gas outlet of the gas branch pipe 200, the supporting combustion gas moves closer to the fuel gas to form turbulence, which is conducive to the full mixing of the supporting combustion gas and the fuel gas.

[0056] Optionally, in this embodiment, the fixing portion 120 is provided with through holes corresponding to the gas branch pipes 200, and the gas branch pipes 200 are sealed and penetrated through the corresponding through holes. The gas branch pipes 200 are fixed through the through holes, which has a simple structure and is easy to assemble.

[0057] Optionally, the gas branch pipeline 200 can be sealed by interference fit with the through hole, or by welding, depending on actual needs.

[0058] Optionally, in a possible embodiment, the combustion-supporting gas flow channel 1111 is an annular channel.

[0059] Optionally, in other possible embodiments, the combustion-supporting gas flow channel 1111 may also be a plurality of spaced channels, which can be arranged according to actual needs. For example, a plurality of recessed portions may be provided on the inner circumferential wall of the gas flow channel 111, and the plurality of recessed portions are spaced apart along the circumference of the gas flow channel 111. The gas branch pipe 200 and the plurality of recessed portions enclose a plurality of spaced channels, and the combustion-supporting gas moves in each channel.

[0060] Optionally, continue to see Figure 3 The distance h1 between the end of the gas channel 111 communicating with the combustion chamber and the end of the gas branch pipe 200 having the gas outlet is 0mm-10mm. This arrangement allows the gas and the auxiliary gas to have no premixing or a shorter premixing space, further reducing the risk of flashback.

[0061] It can be understood that when h1=0mm, the fuel gas and the combustion-supporting gas will be introduced into the combustion chamber separately and then mixed; when 0mm

[0062] Optionally, in one embodiment, the air-fuel ratio may 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 .

[0063] Optionally, in another embodiment, the ratio of the gas to the combustion-supporting gas can also be controlled by controlling the flow rates of the gas and the combustion-supporting gas respectively. For example, a first proportional valve is provided on the gas delivery pipe used to deliver the gas to the plurality of gas branch pipelines 200, and a second proportional valve is provided on the combustion-supporting gas delivery pipe used to deliver the combustion-supporting gas to the combustion-supporting gas chamber 130, and the flow rates of the gas and the combustion-supporting gas are adjusted by adjusting the openings of the first proportional valve and the second proportional valve.

[0064] In other embodiments, the first proportional valve and the second proportional valve may be auxiliaryly provided based on the ratio of the design area of ​​the gas outlet to the cross-sectional area of ​​the combustion-supporting gas flow channel 1111 to jointly control the ratio of the gas to the combustion-supporting gas.

[0065] Further, see Figure 3 In this embodiment, the gas flow channel 111 is coaxially arranged with the gas branch pipe 200, so that the amount of the combustion-supporting gas wrapped around the periphery of the gas can be the same, further improving the mixing uniformity of the combustion-supporting gas and the gas.

[0066] Optionally, a plurality of gas flow channels 111 may be arranged in an array on the gas separation portion 110. Figure 1 As shown, a plurality of gas branch pipes 200 are also arranged in an array on the fixed portion 120. Such an arrangement is conducive to improving the uniformity of the gas supply from the gas distribution structure to the combustion chamber.

[0067] In a possible embodiment, the array of multiple gas flow channels 111 is a plurality of gas flow channel rows arranged in sequence, each gas flow channel row includes a plurality of spaced-apart gas flow channels 111, and the gas flow channels 111 in two adjacent gas flow channel rows can be arranged one-to-one or staggered, depending on actual needs.

[0068] Further, see Figure 1 ​In this embodiment, the gas separation structure further includes a gas separation block 100, and the gas separation block 100 is provided with at least one channel 101 penetrating two opposite sides thereof, and the channel 101 includes a main body and air inlets located at both ends of the main body, and the main body of the channel 101 is a combustion-supporting gas chamber 130, and the portion of the gas separation block 100 located above the combustion-supporting gas chamber 130 is a gas separation portion 110, and the portion of the gas separation block 100 located below the combustion-supporting gas chamber 130 is a fixed portion 120. In this configuration, the gas separation portion 110 and the fixed portion 120 are an integrated structure, and the structural stability is high, and the gas separation structure has fewer parts, which is convenient for processing and assembly of the gas separation structure.

[0069] Optionally, continue to see Figure 1 The gas distribution block 100 may be a rectangular parallelepiped structure, and each pair of oppositely disposed side surfaces of the rectangular parallelepiped structure has a channel 101 passing through. Such a configuration can increase the gas inlet area of ​​the combustion-supporting gas chamber 130 and facilitate increasing the total volume of the combustion-supporting gas chamber 130.

[0070] Embodiment 2

[0071] This embodiment provides a gas separation structure, which is substantially the same as the structure of the first embodiment, and is only improved on the basis of the first embodiment. Therefore, only the differences between the two are described here, and the structures of this embodiment that are the same as those of the first embodiment are not repeated here. In this embodiment, the same or corresponding technical features as those of the first embodiment are marked with the same reference numerals.

[0072] Specifically, Figure 4-Figure 6 As shown, in this embodiment, the gas separation part 110 is a gas separation plate, the fixed part 120 is a fixed plate, and a cushion block 300 is provided between the gas separation plate and the fixed plate. The cushion block 300 enables the gas separation plate and the fixed plate to enclose a combustion-supporting gas chamber 130. Such an arrangement enables the gas separation structure to be processed separately, which is beneficial to improving production efficiency. The gas separation plate and the fixed plate are enclosed to form a combustion-supporting gas chamber 130 through the cushion block 300, which has a simple structure, low cost, and is easy to assemble.

[0073] Furthermore, a plurality of pads 300 may be provided, and the plurality of pads 300 are spaced apart along the circumference of the gas distribution plate, and fasteners are provided through the gas distribution plate, the pads 300 and the fixed plate. By providing a plurality of pads 300, it is possible to improve the stability of the spacing between the gas distribution plate and the fixed plate, and to improve the stability of the combustion-supporting gas chamber. The gas distribution plate, the pads 300 and the fixed plate are connected together by fasteners. Compared with the connection structure of the gas distribution plate and the fixed plate, and the connection structure of the pads 300, the gas distribution plate and the fixed plate are separately provided, the number of parts of the gas distribution structure is reduced, and the assembly and processing of the gas distribution structure is facilitated.

[0074] Optionally, the fastening connection may be a bolt and nut assembly.

[0075] Optionally, the spacer 300 may be a nut, which has low cost and does not require additional processing.

[0076] Embodiment 3

[0077] like Figure 7 and Figure 8 As shown, this embodiment provides a burner, including a first shell 10 and the gas distribution structure provided in Embodiment 1 or Embodiment 2. Due to the adoption of the above-mentioned gas distribution structure, the burner has better combustion effect and combustion safety, and lower gas cost and pollution.

[0078] Specifically, the first shell 10 is provided with a gas inlet chamber 11, a gas separation structure installation chamber and a combustion chamber from bottom to top. The gas separation structure installation chamber is used to install the above-mentioned gas separation structure. Specifically, the gas distribution pipe 200 of the gas separation structure has one end of the gas inlet connected to the gas inlet chamber 11, and the other end of the gas flow channel 111 of the gas separation structure is connected to the combustion chamber. The first shell 10 is also provided with an opening 12, and the supporting combustion gas enters the supporting combustion gas chamber 130 of the gas separation structure through the opening 12.

[0079] When the burner is in use, the gas required for combustion is delivered to the gas inlet chamber 11, then enters the multiple gas branch pipes 200 connected thereto from the gas inlet chamber 11, and finally enters the combustion chamber through the gas flow channel 111. The supporting gas required for combustion is delivered to the supporting gas chamber 130 through the opening 12, then enters the combustion chamber through the supporting gas flow channel 1111, and finally enters the combustion chamber to mix with the gas and burn together.

[0080] Further, see Figure 7 and Figure 8 The burner also includes a second shell 20, which is sleeved outside the first shell 10 and forms a combustion-supporting gas inlet chamber 21 with the side and bottom of the first shell 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 shell 20 and making the second shell 20 and the first shell 10 form a combustion-supporting gas inlet chamber 21 wrapped in the first shell 10, on the one hand, the low-temperature combustion-supporting gas can cool the second shell 20 and the inside of the burner to avoid the burner temperature from being too high, and play a role in heat insulation and backfire prevention. Therefore, the aluminum oxide insulation layer in the prior art can be omitted, the volume and weight of the burner can be reduced, or the combustion area can be increased without changing the volume of the gas burner, thereby improving the combustion power of the burner; on the other hand, after the burner exchanges heat with the combustion-supporting gas, the combustion-supporting gas is preheated, so that the combustion-supporting gas has a certain basic temperature after mixing with the gas, and is more easily ignited and decomposed, which is conducive to the full combustion of the gas.

[0081] Optionally, continue to see Figure 7 and Figure 8In this embodiment, the combustion chamber outer cover is provided with an isolation cover 30, a first gap 40 is provided between the isolation cover 30 and the side wall of the first shell 10, a second gap 50 connected to the first gap 40 is provided between the gas separation structure and the side wall of the first shell 10, the second gap 50 is connected to the combustion-supporting gas chamber 130, the opening 12 is arranged opposite to the isolation cover 30, the combustion-supporting gas in the combustion-supporting gas inlet chamber 21 enters the first gap 40 through the opening 12, and enters the combustion-supporting gas chamber 130 through the second gap 50. Such an arrangement can increase the flow path of the combustion-supporting gas, increase the heat exchange area between the combustion-supporting gas and the burner, and thereby improve the cooling effect of the combustion-supporting gas on the burner.

[0082] Further, see Figure 7 and Figure 8 , an air distribution plate 13 may be provided in the gas inlet chamber 11, and the air distribution plate 13 is located between the inlet of the gas inlet chamber 11 and the gas branch pipe 200. When the gas enters the gas inlet chamber 11 from the inlet of the gas inlet chamber 11, it will be blocked by the air distribution plate 13, so that the gas diffuses to the gap between the air distribution plate 13 and the gas inlet chamber 11 respectively, so that the gas enters the gas inlet chamber 11 and flows along the side wall of the gas inlet chamber 11 to the entire gas inlet chamber 11, which can evenly distribute the gas in the entire gas inlet chamber 11 and prevent the gas from directly rushing to the gas branch pipe 200, thereby improving the combustion stability of the burner.

[0083] Further, see Figure 7 and Figure 8 A porous plate 60 is provided in the combustion chamber, and the gas flowing out of the gas flow channel 111 enters the porous plate 60 and is ignited on the surface of the porous plate 60. Moreover, after the combustion-supporting gas and the fuel gas enter the porous plate 60, they will be further dispersed by the pores in the porous plate 60, which is conducive to the full mixing and combustion of the combustion-supporting gas and the fuel gas.

[0084] Optionally, continue to see Figure 7 and Figure 8 A groove 61 is provided on one side of the porous plate 60 close to the gas separation structure. The groove 61 and the gas separation structure form an airflow buffer zone. The gas and the supporting gas are mixed in the airflow buffer zone and then enter the porous plate 60. In this way, the gas and the supporting gas are reformed in the airflow buffer zone and then enter the porous plate 60. On the one hand, the resistance of the gas entering the porous plate 60 can be reduced, and the flow rate of the gas can be accelerated; on the other hand, the gas and the supporting gas can be fully mixed.

[0085] Optionally, continue to see Figure 8In a possible embodiment, a combustion element 62 may be provided on the porous plate 60, and the combustion-supporting gas and the combustion gas are further mixed in the porous plate 60 and then burned in the combustion element 62. Compared with a burner that uses a long-distance flame spray, the flame burning in the combustion element 62 can reduce the distance between the heated object and the combustion surface, and reduce the burning and oxidation of the heated object by the flame.

[0086] Optionally, continue to see Figure 7 and Figure 8 A fixing member 90 is provided on the inner peripheral wall of the isolation cover 30. The fixing member 90 is used to fix the combustion member 62. The combustion member 62 can be abutted against the fixing member 90 around it.

[0087] Optionally, the combustion element 62 may be a foam porous ceramic plate, a grid-like ceramic plate, or a multi-layer interwoven metal wire mesh.

[0088] Optionally, the combustion member 62 may be an infrared combustion plate, which can make the temperature of the combustion surface above 800° C., or even reach 1200° C. In the case of no heat insulation layer, the cooling solution of wrapping the first shell 10 with the combustion-supporting gas inlet chamber 21 can stabilize the temperature of the second shell 20 at 38° C.-40° C., and the risk of flashback is low.

[0089] Further, see Figure 7 and Figure 8 The burner further includes a gas delivery pipe 70 and a combustion-supporting gas delivery pipe 80. The gas delivery pipe 70 is connected to the inlet at the bottom of the gas inlet chamber 11. The combustion-supporting gas delivery pipe 80 is sleeved outside the gas delivery pipe 70 and is connected to the inlet at the bottom of the combustion-supporting gas inlet chamber 21. Such a configuration has a simple structure and is easy to assemble.

[0090] Optionally, in this embodiment, the inlet of the combustion-supporting gas delivery pipe 80 is arranged on the side thereof.

[0091] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Gas separation structure, characterized in that: include: A gas separation portion (110), wherein the gas separation portion (110) is provided with a plurality of gas flow channels (111); The fixing portion (120) and the gas separation portion (110) enclose a combustion-supporting gas chamber (130), wherein the combustion-supporting gas chamber (130) is in communication with one end of the gas flow channel (111), and the other end of the gas flow channel (111) is used to communicate with the combustion chamber; The gas branch pipes (200) are arranged in one-to-one correspondence with the gas flow channels (111); one end of the gas branch pipe (200) having a gas outlet passes through the fixing portion (120) and the combustion-supporting gas chamber (130) and extends into the corresponding gas flow channel (111); and the outer peripheral wall of the gas branch pipe (200) and the inner peripheral wall of the gas flow channel (111) form a combustion-supporting gas flow channel (1111) for the circulation of the combustion-supporting gas.

2. The gas separation structure according to claim 1, characterized in that: The distance between one end of the gas flow channel (111) communicating with the combustion chamber and one end of the gas branch pipe (200) having the gas outlet is 0 mm-10 mm.

3. The gas separation structure according to claim 1, characterized in that: The gas flow channel (111) and the gas branch pipeline (200) are coaxially arranged.

4. The gas separation structure according to claim 1, characterized in that: The plurality of gas flow channels (111) are arranged in an array on the gas separation portion (110).

5. The gas separation structure according to any one of claims 1 to 4, characterized in that: The gas separation structure also includes a gas separation block (100), the gas separation block (100) is provided with at least one channel (101) penetrating two opposite side surfaces thereof, the channel (101) includes a main body and air inlets located at two ends of the main body, the main body is the combustion-supporting gas chamber (130), the portion of the gas separation block (100) located above the combustion-supporting gas chamber (130) is the gas separation portion (110), and the portion of the gas separation block (100) located below the combustion-supporting gas chamber (130) is the fixed portion (120).

6. The gas separation structure according to claim 5, characterized in that: The gas distribution block (100) is in the form of a rectangular parallelepiped structure, and each pair of two oppositely disposed side surfaces of the rectangular parallelepiped structure is penetrated by a channel (101).

7. The gas separation structure according to any one of claims 1 to 4, characterized in that: The gas distribution part (110) is a gas distribution plate, the fixed part (120) is a fixed plate, a cushion block (300) is provided between the gas distribution plate and the fixed plate, and the cushion block (300) enables the gas distribution plate and the fixed plate to enclose the combustion-supporting gas chamber (130).

8. The gas separation structure according to claim 7, characterized in that: A plurality of the cushion blocks (300) are provided, and the plurality of cushion blocks (300) are arranged at intervals along the circumference of the gas distribution plate, and fastening connectors are provided through the gas distribution plate, the cushion blocks (300) and the fixing plate.

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

10. The burner according to claim 9, characterized in that The burner further comprises a second shell (20), the second shell (20) being sleeved outside the first shell (10) and forming a combustion-supporting gas inlet chamber (21) with the side surface and the bottom surface of the first shell (10), the combustion-supporting gas in the combustion-supporting gas inlet chamber (21) being able to enter the combustion-supporting gas chamber (130) through the opening (12).

11. The burner according to claim 10, characterized in that The combustion chamber outer cover is provided with an isolation cover (30), a first gap (40) is defined between the isolation cover (30) and the side wall of the first shell (10), a second gap (50) is defined between the gas separation structure and the side wall of the first shell (10) and is communicated with the first gap (40), the second gap (50) is communicated with the combustion-supporting gas chamber (130), the opening (12) and the isolation cover (30) are arranged opposite to each other, the combustion-supporting gas in the combustion-supporting gas inlet chamber (21) enters the first gap (40) through the opening (12), and enters the combustion-supporting gas chamber (130) through the second gap (50).

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

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

14. The burner according to claim 13, characterized in that A groove (61) is provided on one side of the porous plate (60) close to the gas separation structure, and the groove (61) and the gas separation structure form an airflow buffer zone, and the fuel gas and the supporting fuel gas are mixed in the airflow buffer zone and then enter the porous plate (60).

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