Porous media burner and combustion device

Abstract

The present application provides a porous medium burner and a combustion device, which relate to the technical field of burners. The porous medium burner includes a main body and a combustion structure; the main body includes a cylindrical shell with an opening, and a partition is provided inside the cylindrical shell. The partition divides the storage space of the cylindrical shell into a first airflow space and a second airflow space. The partition is provided with a first through hole, and the first airflow space and the second airflow space are connected through the first through hole. The side wall of the cylindrical shell is provided with a second through hole. The combustion mechanism is connected to the main body at both ends of the axial direction. The combustion mechanism is arranged around the outer wall of the cylindrical shell and spaced apart from the outer wall of the cylindrical shell to define an airflow storage chamber. The airflow storage chamber is connected to the storage space through the second through hole. The combustion mechanism has a porous ceramic body, and the holes of the porous ceramic body are connected to the airflow storage chamber. It can even out the airflow of the burner mixture and improve the uniformity of the distribution of the mixture.

Description

Technical Field

[0001] The present application relates to the technical field of burners, and in particular to a porous medium burner and a combustion device. Background Art

[0002] With the implementation of national environmental protection policies, the emission standards for NOx generated during combustion are becoming increasingly stringent. As a new combustion technology, porous media combustion is gaining increasing attention for its application in low-nitrogen combustion.

[0003] The cylindrical burner has the advantages of small size and large combustion specific surface area, but the gas distribution of the premixed gas in the cylindrical burner will affect the stability of the combustion state. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a porous medium burner and a combustion device, which can even out the flow of mixed gas in the burner and improve the uniformity of the distribution of the mixed gas.

[0005] The embodiment of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a porous medium burner, comprising a main body and a combustion mechanism;

[0007] The main body includes a cylindrical shell having an internal accommodation space, one end of the cylindrical shell having an opening for the mixed gas to enter, a partition provided inside the cylindrical shell, the partition dividing the accommodation space into a first airflow space and a second airflow space distributed along the axial direction, the first airflow space being connected to the opening, the partition having a first through hole formed therein, the first airflow space and the second airflow space being connected through the first through hole, and a second through hole further formed on a side wall of the cylindrical shell;

[0008] The combustion mechanism is connected to the main body at both ends of the axial direction. The combustion mechanism is arranged in an annular shape on the outer wall of the cylindrical shell and is spaced apart from the outer wall of the cylindrical shell to define an airflow accommodating chamber. The airflow accommodating chamber is connected to the accommodating space through a second through hole. The combustion mechanism has a porous ceramic body, and the holes of the porous ceramic body are connected to the airflow accommodating chamber.

[0009] In the above technical solution, the applicant found in the study that the mixed gas enters the cylindrical burner by the action of the fan. When the mixed gas enters the cylindrical burner, more mixed gas will be concentrated in the part away from the air inlet end of the burner, which will cause the gas to be unevenly distributed in the burner, affecting the stability of the combustion state. In the solution of the embodiment of the present application, the partition separates the accommodating space of the cylindrical shell into a first airflow space and a second airflow space distributed in the axial direction. The first airflow space is connected to the opening, and the airflow enters the first airflow space from the opening. Under the blocking effect of the partition, the mixed gas entering the second airflow space is reduced relative to when the partition is not set, and the uniform distribution degree of the mixed gas in the first airflow space and the mixed gas in the second airflow space is improved. The mixed gas in the first airflow space and the second airflow space both enter the airflow accommodating cavity through the second through hole, and then enter the holes of the porous ceramic body for combustion. Since the uniform distribution degree of the mixed gas in the first airflow space and the mixed gas in the second airflow space is improved, the mixed gas entering the holes of the porous ceramic body is more stable when burning.

[0010] In a possible embodiment, the partition includes a partition and a connecting portion, the partition is arranged in the middle of the radial cross-section of the cylindrical shell, the two ends of the connecting portion are respectively connected to the partition and the cylindrical shell, and the edge of the partition and the inner wall of the cylindrical shell are spaced apart.

[0011] In the above technical solution, the partition mainly plays the role of blocking the airflow. Under the blocking effect of the partition, the airflow enters the second airflow space from the gap between the edge of the partition and the cylindrical shell. The partition is arranged in the middle of the radial cross-section of the cylindrical shell. The mixed gas can be evenly dispersed in the area close to the edge of the second airflow space, thereby better improving the uniformity of the mixed gas entering the pores of the porous ceramic body.

[0012] In a possible embodiment, a cross section of the partition along the radial direction of the cylindrical shell is the same as a radial cross section of the cylindrical shell, and a ratio of an outer diameter of the partition to an inner diameter of the cylindrical shell is 2 to 3:4.

[0013] In the above technical solution, the applicant has found through research that the above arrangement can better ensure the uniform distribution of the mixed air in the first airflow space and the second airflow space.

[0014] In a possible embodiment, the partition is provided with a connecting hole that penetrates the partition in a thickness direction, and the ratio of the area of the connecting hole to the area of the partition is 1 to 3:10.

[0015] In the above technical solution, the connecting hole accounts for a relatively small proportion relative to the partition, and a small part of the air flow can pass through the connecting hole. Most of the mixed gas will still be blocked by the partition and enter the second air flow space from the gap between the edge of the partition and the cylindrical shell, thereby also improving the uniformity of the mixed gas entering the holes of the porous ceramic body.

[0016] In a possible embodiment, the partition is plate-shaped, and an angle between a surface of the partition close to the opening and a radial direction of the cylindrical shell is ≤30°.

[0017] In the above technical solution, the applicant has found through research that when the angle between the partition and the radial direction of the cylindrical shell is ≤30°, it is more conducive to uniform distribution of the mixed gas in the first airflow space and the second airflow space.

[0018] In a possible embodiment, the partition is arranged in the middle of the cylindrical housing in the axial direction.

[0019] In the above technical solution, the applicant has found through research that arranging the partition in the middle of the accommodating space is more conducive to uniform distribution of the mixed air in the first airflow space and the second airflow space.

[0020] In a possible embodiment, the combustion mechanism includes a support structure, which is connected to the main body at both axial ends, and the support structure is arranged in an annular manner on the outer wall of the cylindrical shell and spaced apart from the outer wall of the cylindrical shell to define an airflow accommodating chamber, and the airflow accommodating chamber is connected to the accommodating space through a second through hole, and the support structure is provided with a third through hole in the radial direction; the porous ceramic body is arranged in an annular manner on the outside of the cylindrical shell, and the porous ceramic body is fixed to the support structure, and the holes of the porous ceramic body are connected to the airflow accommodating chamber through the third through hole.

[0021] In the above technical solution, the support structure provides support for the porous ceramic body, and the mixed gases of the first airflow space and the second airflow space enter the airflow accommodating chamber through the second through hole. The airflow accommodating chamber is connected to the holes of the porous ceramic body through the third through hole. The mixed gases then pass through the airflow accommodating chamber and enter the holes of the porous ceramic body from the third through hole for combustion.

[0022] In a possible embodiment, the support structure includes two support blocks distributed axially along the cylindrical shell, and both support blocks have an annular bayonet. The annular bayonet of the two support blocks are arranged opposite to each other, and the two ends of the porous ceramic body are respectively clamped in the annular bayonet of the two support blocks. A fixing part is installed in the airflow accommodating cavity, and the two ends of the fixing part along the radial direction are respectively connected to the columnar shell and the connection point of the two support blocks.

[0023] In the above technical solution, the porous ceramic body can be better fixed by clamping it in the annular clamping holes of the two support blocks. The two support blocks of the support structure are connected to the columnar shell through fixing parts, making the two support blocks more stable.

[0024] In a possible embodiment, the fixing ring is arranged on the outer wall of the cylindrical shell and divides the airflow accommodating cavity into a first airflow channel and a second airflow channel. The first airflow channel is connected to the first airflow space and separated from the second airflow space, and the second airflow channel is connected to the second airflow space.

[0025] In the above technical solution, the fixing part divides the airflow containing cavity into a first airflow channel and a second airflow channel. The mixed gas in the first airflow space can flow into the first airflow channel, and the mixed gas in the second airflow space can flow into the second airflow channel. The first airflow channel and the second airflow channel are separated by the fixing part, so that the mixed gas entering the porous ceramic body from the first airflow channel and the second airflow channel is more evenly distributed.

[0026] In a possible embodiment, the main body includes a first connecting plate and a second connecting plate arranged at both ends of the cylindrical shell in the axial direction, the first connecting plate is connected to the cylindrical shell and the supporting structure, and seals one end of the accommodating space and the airflow accommodating cavity; the outer wall of the cylindrical shell is connected to a connecting piece, the second connecting plate is connected to the supporting structure and seals the other end of the airflow accommodating cavity, and the second connecting plate and the connecting piece are detachably connected.

[0027] In the above technical solution, the columnar shell and one end of the supporting structure are fixed by the first connecting plate, and the supporting structure is fixed to the other end of the columnar shell by connecting the second connecting plate to the connecting member. Since the second connecting plate and the connecting member are detachably connected, the columnar shell and the supporting structure can be easily disassembled and inspected.

[0028] In a second aspect, an embodiment of the present application provides a combustion device, comprising a mixing mechanism and a porous medium burner of the first aspect embodiment, wherein the mixing mechanism is used to mix fuel gas and combustion-supporting gas, and the gas outlet end of the mixing mechanism is connected to the opening of the cylindrical shell.

[0029] In the above technical solution, the fuel gas and the combustion-supporting gas are mixed by a mixing combustion mechanism, and then passed into the interior of the cylindrical shell from the mixing combustion mechanism. Since the uniform distribution of the mixed gas in the first air flow space and the mixed gas in the second air flow space is improved, the mixed gas entering the pores of the porous ceramic body is more stable during combustion.

[0030] In a possible embodiment, the mixed combustion mechanism includes a mixing tube, a gas tube and a combustion-supporting gas tube. One end of the gas tube is arranged in the mixing tube along the length direction of the mixing tube. The inner wall of the mixing tube and the outer wall of the gas tube are sealed by an annular sealing plate. The end of the gas tube extending into the mixing tube is sealed. The side wall of the gas tube has a gas hole. The gas hole connects the interior of the gas tube and the interior of the mixing tube. The gas outlet end of the combustion-supporting gas tube is connected to the interior of the mixing tube. A swirl plate for the mixed gas to pass through is installed inside the mixing tube.

[0031] In the above technical solution, the gas enters the mixing tube through the gas hole from the gas pipe, and the supporting gas enters the mixing tube from the supporting gas pipe. The gas and supporting gas are mixed inside the mixing tube. Since the gas pipe is arranged on the side wall of the gas pipe, the gas is distributed around the gas pipe, which is conducive to uniform mixing of the gas and supporting gas. A swirl plate is installed inside the mixing tube. The swirl plate will limit the mixed gas to be more evenly dispersed inside the mixing tube, thereby enhancing the uniformity of mixing of the gas and supporting gas.

[0032] In a possible embodiment, the swirl plate includes a plurality of blades, and the swirl angle of the blades is 32-45°.

[0033] In the above technical solution, the applicant has found through research that when the swirl angle of the blade is 32 to 45 degrees, it is more conducive to uniform mixing of the fuel gas and the supporting gas.

[0034] In a possible embodiment, the gas pipe and the mixing pipe are coaxially arranged.

[0035] In the above technical solution, the gas pipe and the mixing pipe are coaxially arranged, which can enhance the uniform distribution of the gas inside the mixing pipe, thereby being more conducive to the uniform mixing of the gas and the supporting combustion gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 This is a schematic structural diagram of a porous medium burner according to an embodiment of the present application;

[0038] Figure 2 for Figure 1 Cross-sectional view of AA;

[0039] Figure 3 for Figure 1 Cross-sectional view of the middle BB;

[0040] Figure 4 for Figure 1 Cross-sectional view of CC;

[0041] Figure 5 This is a schematic structural diagram of a support member according to an embodiment of the present application;

[0042] Figure 6 This is a structural schematic diagram of the support member of an embodiment of the present application from another perspective;

[0043] Figure 7 This is a simulated diagram of flow velocity distribution in the first airflow space and the second airflow space of a porous medium burner according to an embodiment of the present application;

[0044] Figure 8 This is a simulated diagram of the flow velocity distribution of the first airflow space and the second airflow space without the partition of the present application;

[0045] Figure 9 This is a schematic structural diagram of a combustion device according to an embodiment of the present application;

[0046] Figure 10 for Figure 9 Cross-sectional view of DD.

[0047] Icons: 100 - combustion device; 10 - porous medium burner; 11 - main body; 111 - cylindrical shell; 111a - opening; 1111 - first airflow space; 1112 - second airflow space; 1113 - second through hole; 112 - partition; 1121 - first through hole; 1122 - partition; 1123 - connecting part; 113 - first connecting plate; 114 - second connecting plate; 115 - connecting member; 12 - support Support structure; 121-third through hole; 122-support block; 122a-support member; 1221-annular bayonet; 123-fixing member; 13-airflow accommodating chamber; 131-first airflow channel; 132-second airflow channel; 14-porous ceramic body; 20-mixed combustion mechanism; 21-mixing tube; 22-gas pipe; 23-combustion-supporting pipe; 231-gas hole; 24-annular sealing plate; 25-swirl plate; 251-blade. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0050] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0051] In the description of this application, it should be noted that the terms "center," "left," "right," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, or electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0053] The present application embodiment provides a porous medium burner 10, please refer to Figure 1 , which includes a main body 11, a support structure 12 and a porous ceramic body 14.

[0054] The main body 11 includes a cylindrical shell 111 with an internal accommodation space. One end of the cylindrical shell 111 has an opening 111a for the mixed gas to enter. For example, the cylindrical shell 111 can be a cylindrical shell 111 or a rectangular cylindrical shell 111 such as a square or hexagonal cylindrical shell 111.

[0055] A partition 112 is provided inside the cylindrical housing 111 (see Figure 1 and Figure 3), the partition 112 divides the accommodation space into a first airflow space 1111 and a second airflow space 1112, distributed along the axial direction. The first airflow space 1111 is connected to the opening 111a. The partition 112 defines a first through-hole 1121, through which the first and second airflow spaces 1111 and 1112 are connected. The sidewall of the cylindrical housing 111 also defines a second through-hole 1113. Exemplarily, the first airflow space 1111 is located to the right of the second airflow space 1112.

[0056] The applicant found in the research that the mixed gas is blown into the cylindrical burner by the action of the fan. When the mixed gas enters the cylindrical burner, more mixed gas will be concentrated in the part far away from the air inlet end of the burner, which will cause the gas to be unevenly distributed in the burner, affecting the stability of the combustion state. In the solution of the embodiment of the present application, the partition 112 divides the accommodating space of the cylindrical shell into a first airflow space 1111 and a second airflow space 1112 distributed along the axial direction. The first airflow space 1111 is connected to the opening 111a, and the airflow enters the first airflow space 1111 from the opening 111a. Under the blocking effect of the partition 112, the mixed gas entering the second airflow space 1112 is reduced compared to when the partition 112 is not set, and the uniform distribution of the mixed gas in the first airflow space 1111 and the mixed gas in the second airflow space 1112 is improved.

[0057] Exemplarily, the partition 112 is plate-shaped, and the angle between a surface of the partition 112 proximal to the opening 111a and the radial direction of the cylindrical housing 111 is ≤ 30°, for example, 30°, 20°, 10°, 5°, or 0°. The applicant has found that an angle of ≤ 30° between the partition 112 and the radial direction of the cylindrical housing 111 is more conducive to uniform distribution of the mixed air in the first airflow space 1111 and the second airflow space 1112.

[0058] In a possible embodiment, the partition 112 includes a partition portion 1122 and a connecting portion 1123. The partition portion 1122 is arranged in the middle of the radial cross-section of the cylindrical shell 111. The two ends of the connecting portion 1123 are respectively connected to the partition portion 1122 and the cylindrical shell 111. The edge of the partition portion 1122 and the inner wall of the cylindrical shell 111 are spaced apart.

[0059] The partition 1122 mainly plays the role of blocking the airflow. Under the blocking effect of the partition 1122, the airflow enters the second airflow space 1112 from the gap between the edge of the partition 1122 and the cylindrical shell 111. The partition 1122 is arranged in the middle of the radial cross-section of the cylindrical shell 111, and the mixed gas can be evenly dispersed in the area near the edge of the second airflow space 1112.

[0060] Optionally, the cross section of the partition 1122 along the radial direction of the cylindrical housing 111 is the same as the radial cross section of the cylindrical housing 111, for example, both are circular or square. The ratio of the outer diameter of the partition 1122 to the inner diameter of the cylindrical housing 111 is 2 to 3:4.

[0061] The applicant has found through research that the above arrangement can better ensure the uniform distribution of the mixed air in the first airflow space 1111 and the second airflow space 1112 .

[0062] Optionally, the partition 1122 is provided with a connecting hole penetrating the thickness direction of the partition 1122 , and the ratio of the area of the connecting hole to the area of the partition 1122 is 1 to 3:10.

[0063] The connecting hole accounts for a smaller proportion than the partition 1122 , and a small part of the air flow can pass through the connecting hole. Most of the mixed gas will still be blocked by the partition 1122 and enter the second air flow space 1112 from the gap between the edge of the partition 1122 and the cylindrical shell 111 .

[0064] Exemplarily, the partition 112 is disposed in the middle of the cylindrical housing in the axial direction.

[0065] The applicant has discovered that placing the divider 112 in the middle of the storage space is more conducive to evenly distributing the mixed gas in the first airflow space 1111 and the second airflow space 1112. It should be noted that placing the divider 112 in the middle of the storage space means placing the divider 112 in the space between 1 / 3 and 2 / 3 of the storage space in the axial direction.

[0066] In addition, according to the applicant's test, when the partition 112 is set at 1 / 2 of the axial direction of the cylindrical shell, and the partition 112 includes a partition portion 1122 and a connecting portion 1123, the ratio of the outer diameter of the partition portion 1122 to the inner diameter of the cylindrical shell 111 is 2:3, and the angle between the side of the partition 112 close to the opening 111a and the radial direction of the cylindrical shell 111 is 0° (refer to Figure 3 ), the flow rates of the first airflow space 1111 and the second airflow space 1112 are both around 5, and the mixed gas is distributed more evenly (refer to Figure 7 ). In comparison, when other conditions are the same but the partition 112 is not provided, the flow rates of the first airflow space 1111 and the second airflow space 1112 differ greatly (refer to Figure 8 ).

[0067] Among them, the combustion mechanism is connected to the main body 11 at both ends of the axial direction, and the combustion mechanism is arranged in an annular shape on the outer wall of the cylindrical shell 111 and is spaced apart from the outer wall of the cylindrical shell 111 to define an airflow accommodating chamber 13. The airflow accommodating chamber 13 is connected to the accommodating space through the second through hole 1113. The combustion mechanism has a porous ceramic body 14, and the holes of the porous ceramic body 14 are connected to the airflow accommodating chamber 13.

[0068] The mixed gas in the first airflow space 1111 and the second airflow space 1112 enters the airflow receiving chamber 13 through the second through hole 1113, and then enters the holes of the porous ceramic body 14 for combustion. Since the mixed gas in the first airflow space 1111 and the mixed gas in the second airflow space 1112 are more evenly distributed, the mixed gas entering the holes of the porous ceramic body 14 burns more stably.

[0069] Furthermore, in a possible embodiment, the combustion mechanism includes a support structure 12, the support structure 12 is connected to the main body 11 at both ends of the axial direction, the support structure 12 is arranged around the outer wall of the cylindrical shell 111 and is spaced apart from the outer wall of the cylindrical shell 111 to define an airflow accommodating cavity 13 (refer to Figure 1 and Figure 2 ), the airflow accommodating cavity 13 is connected to the accommodating space through the second through hole 1113, and the support structure 12 is provided with a third through hole 121 along the radial direction.

[0070] For example, the main body 11 includes a first connecting plate 113 and a second connecting plate 114 provided at both ends of the cylindrical housing 111 in the axial direction. Figure 1 As shown, a first connecting plate 113 is provided on the left side, and a second connecting plate 114 is provided on the right side. The first connecting plate 113 is connected to the cylindrical housing 111 and the support structure 12, and seals the receiving space and one end of the airflow receiving chamber 13. A connecting member 115 is connected to the outer wall of the cylindrical housing 111. The second connecting plate 114 is connected to the support structure 12 and seals the other end of the airflow receiving chamber 13. The second connecting plate 114 and the connecting member 115 are detachably connected.

[0071] The first connecting plate 113 secures one end of the columnar housing 111 to the support structure 12, and the second connecting plate 114 is connected to the connecting member 115 to secure the support structure 12 to the other end of the columnar housing 111. Since the second connecting plate 114 and the connecting member 115 are detachably connected, it is convenient to disassemble and inspect the columnar housing 111 and the support structure 12. For example, the connecting member 115 has a first bolt hole, and the second connecting plate 114 has a corresponding second bolt hole. Bolts inserted through the first and second bolt holes secure the connecting member 115 to the second connecting plate 114.

[0072] The porous ceramic body 14 is disposed around the outside of the cylindrical housing 111 and fixed to the support structure 12 . The holes of the porous ceramic body 14 are connected to the airflow receiving chamber 13 through the third through hole 121 .

[0073] The mixed air in the first airflow space 1111 and the second airflow space 1112 both enter the airflow receiving chamber 13 through the second through-hole 1113. The airflow receiving chamber 13 is connected to the pores of the porous ceramic body 14 through the third through-hole 121. The mixed air then passes through the airflow receiving chamber 13 and enters the pores of the porous ceramic body 14 through the third through-hole 121 for combustion. Because the mixed air in the first airflow space 1111 and the mixed air in the second airflow space 1112 are more evenly distributed, the mixed air entering the pores of the porous ceramic body 14 burns more stably.

[0074] Please refer to Figures 1-6 In a possible embodiment, the support structure 12 includes two support blocks 122 distributed axially along the cylindrical shell 111. The two support blocks 122 are arranged in the axial direction. Both support blocks 122 have an annular bayonet 1221. The annular bayonet 1221 of the two support blocks 122 are arranged opposite to each other. The two ends of the porous ceramic body 14 are respectively clamped in the annular bayonet 1221 of the two support blocks 122. A fixing part 123 is installed in the airflow accommodating cavity 13. The two ends of the fixing part 123 along the radial direction are respectively connected to the connection points of the cylindrical shell 111 and the two support blocks 122.

[0075] By clamping the porous ceramic body 14 in the annular bayonet 1221 of the two support blocks 122, the porous ceramic body 14 can be better fixed. The two support blocks 122 of the support structure 12 are connected to the cylindrical shell 111 through the fixing parts 123, making the two support blocks 122 more stable.

[0076] Optionally, the support block 122 includes a plurality of support members 122a (see Figure 5 and Figure 6 ), multiple support members 122a are spliced together to form a support block 122. Illustratively, support block 122 includes a bridge body and a base. The bridge body is disposed around the exterior of the cylindrical shell, the base protrudes from the bridge body, and an annular bayonet 1221 is recessed into the base. Illustratively, support block 122 can be made of a material with low thermal conductivity and high temperature resistance to facilitate heat dissipation during combustion. For example, support block 122 is made of alumina fiberboard.

[0077] For further information, please refer to Figure 1In a possible embodiment, the fixing member 123 is arranged around the outer wall of the cylindrical shell 111 and divides the airflow accommodating chamber 13 into a first airflow channel 131 and a second airflow channel 132. The first airflow channel 131 is connected to the first airflow space 1111 and separated from the second airflow space 1112, and the second airflow channel 132 is connected to the second airflow space 1112.

[0078] The fixing part 123 separates the airflow accommodating chamber 13 into a first airflow channel 131 and a second airflow channel 132. The mixed gas in the first airflow space 1111 can flow into the first airflow channel 131, and the mixed gas in the second airflow space 1112 can flow into the second airflow channel 132. The first airflow channel 131 and the second airflow channel 132 are separated by the fixing part 123, so that the mixed gas from the first airflow channel 131 and the second airflow channel 132 enter the porous ceramic body 14 respectively, and the mixed gas entering the porous ceramic body 14 is more evenly distributed.

[0079] The present application also provides a combustion device 100, please refer to Figure 9 It includes a mixing combustion mechanism 20 and a porous medium burner 10 of an embodiment of the present application. The mixing combustion mechanism 20 is used to mix fuel gas and combustion-supporting gas. The gas outlet end of the mixing combustion mechanism 20 is connected to the opening 111a of the cylindrical shell 111.

[0080] The fuel gas and the combustion-supporting gas are mixed through the mixing mechanism 20 and then passed into the interior of the cylindrical shell 111 from the mixing mechanism 20. Since the uniform distribution of the mixed gas in the first air flow space 1111 and the mixed gas in the second air flow space 1112 is improved, the mixed gas entering the pores of the porous ceramic body 14 is more stable during combustion.

[0081] In one possible embodiment, the co-combustion mechanism 20 includes a mixing tube 21, a gas tube 22, and a combustion-supporting gas tube 23. One end of the gas tube 22 is disposed within the mixing tube 21 along its length. The inner wall of the mixing tube 21 and the outer wall of the gas tube 22 are sealed via an annular sealing plate 24. The end of the gas tube 22 extending into the mixing tube 21 is sealed. The sidewall of the gas tube 22 has a gas hole 231, which connects the interior of the gas tube 22 with the interior of the mixing tube 21. For example, the sidewall of the gas tube 22 may be flat or may include a curved surface.

[0082] The gas outlet end of the combustion-supporting pipe 23 is connected to the interior of the mixing pipe 21, and a swirl plate 25 for the mixed gas to pass through is installed inside the mixing pipe 21 (see Figure 10 For example, the combustion-supporting gas pipe 23 extends from the side wall of the mixing tube 21 into the interior of the mixing tube 21 .

[0083] The gas enters the mixing tube 21 from the gas pipe 22 through the gas hole 231, and the supporting combustion gas enters the mixing tube 21 from the supporting combustion gas pipe 23. The gas and supporting combustion gas are mixed inside the mixing tube 21. Since the gas pipe 22 is arranged on the side wall of the gas pipe 22, the gas is distributed around the gas pipe 22, which is conducive to uniform mixing of the gas and supporting combustion gas. A swirl plate 25 is installed inside the mixing tube 21. The swirl plate 25 will limit the mixed gas to be more evenly dispersed inside the mixing tube 21, thereby enhancing the uniformity of mixing of the gas and supporting combustion gas.

[0084] Optionally, the swirl sheet 25 includes a plurality of blades 251 , and the swirl angle of the blades 251 is 32° to 45°, for example, 32°, 34°, 37°, 38°, 40°, 42° or 45°.

[0085] The applicant has found through research that when the swirl angle of the blade 251 is 32-45°, it is more conducive to uniform mixing of the fuel gas and the supporting gas.

[0086] For example, the gas pipe 22 is coaxially arranged with the mixing pipe 21. The gas pipe 22 is coaxially arranged with the mixing pipe 21, and the uniform distribution of the gas distributed around the gas pipe 22 inside the mixing pipe 21 can be improved, thereby being more conducive to the uniform mixing of the gas and the supporting gas.

[0087] The working principle of the combustion device 100 in the embodiment of the present application is:

[0088] The gas enters the mixing tube 21 from the gas pipe 22 through the gas hole 231, and the supporting combustion gas enters the mixing tube 21 from the supporting combustion gas pipe 23. The gas and supporting combustion gas are mixed inside the mixing tube 21. A swirl plate 25 is installed inside the mixing tube 21. The swirl plate 25 will limit the mixed gas to be more evenly dispersed inside the mixing tube 21, thereby enhancing the uniformity of mixing of the gas and supporting combustion gas.

[0089] The mixed gas enters the first airflow space 1111 from the mixing tube 21 through the opening 111a of the cylindrical shell 111. Under the blocking effect of the partition 112, the mixed gas entering the second airflow space 1112 is reduced compared to when the partition 112 is not provided, and the mixed gas in the first airflow space 1111 and the mixed gas in the second airflow space 1112 are more evenly distributed. The mixed gas in the first airflow space 1111 and the second airflow space 1112 both enter the airflow accommodating chamber 13 through the second through hole 1113. The airflow accommodating chamber 13 is connected to the holes of the porous ceramic body 14 through the third through hole 121. The mixed gas then passes through the airflow accommodating chamber 13 and enters the holes of the porous ceramic body 14 from the third through hole 121 for combustion. Since the mixed gas in the first airflow space 1111 and the mixed gas in the second airflow space 1112 are more evenly distributed, the mixed gas entering the holes of the porous ceramic body 14 is more stable during combustion.

[0090] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A porous medium burner, characterized in that: include: A main body, the main body comprising a cylindrical shell having an internal accommodation space, one end of the cylindrical shell having an opening for the mixed gas to enter, a partition provided inside the cylindrical shell, the partition dividing the accommodation space into a first airflow space and a second airflow space distributed along the axial direction of the cylindrical shell, the first airflow space being connected to the opening, the partition having a first through hole, the first airflow space and the second airflow space being connected through the first through hole, and a second through hole being further provided on a side wall of the cylindrical shell; and A combustion mechanism, wherein the combustion mechanism is connected to the main body at both ends of the axial direction, the combustion mechanism is arranged in an annular manner on the outer wall of the cylindrical shell and is spaced apart from the outer wall of the cylindrical shell to define an airflow accommodating chamber, and the airflow accommodating chamber is connected to the accommodating space through the second through hole. The combustion mechanism has a porous ceramic body, and the holes of the porous ceramic body are connected to the airflow accommodating chamber.

2. The porous media burner according to claim 1, characterized in that: The partition includes a partition portion and a connecting portion. The partition portion is arranged in the middle of the radial cross section of the cylindrical shell. Both ends of the connecting portion respectively connect the partition portion and the cylindrical shell. The edge of the partition portion and the inner wall of the cylindrical shell are spaced apart.

3. The porous media burner according to claim 2, characterized in that: A cross section of the partition along the radial direction of the cylindrical shell is the same as a radial cross section of the cylindrical shell, and a ratio of an outer diameter of the partition to an inner diameter of the cylindrical shell is 2 to 3:

4.

4. The porous media burner according to claim 3, characterized in that: The partition is provided with a communicating hole penetrating the partition in a thickness direction, and the ratio of the area of the communicating hole to the area of the partition is 1 to 3:

10.

5. The porous medium burner according to any one of claims 1 to 4, characterized in that: The separator is plate-shaped, and an angle between a surface of the separator close to the opening and a radial direction of the columnar shell is ≤30°.

6. The porous medium burner according to any one of claims 1 to 4, characterized in that: The partition is provided at a middle portion of the cylindrical housing in an axial direction.

7. The porous medium burner according to any one of claims 1 to 4, characterized in that: The combustion mechanism includes a support structure, which is connected to the main body at both ends of the axial direction. The support structure is arranged in an annular manner on the outer wall of the cylindrical shell and is spaced apart from the outer wall of the cylindrical shell to define the airflow accommodating cavity. The airflow accommodating cavity is connected to the accommodating space through the second through hole. The support structure is provided with a third through hole in the radial direction; the porous ceramic body is arranged in an annular manner on the outside of the cylindrical shell, and the porous ceramic body is fixed to the support structure. The holes of the porous ceramic body are connected to the airflow accommodating cavity through the third through hole.

8. The porous media burner according to claim 7, characterized in that: The support structure includes two support blocks distributed axially along the cylindrical shell, and both support blocks have an annular bayonet. The annular bayonet of the two support blocks are arranged opposite to each other, and the two ends of the porous ceramic body are respectively clamped in the annular bayonet of the two support blocks. A fixing part is installed in the airflow accommodating cavity, and the two ends of the fixing part along the radial direction are respectively connected to the connection point of the cylindrical shell and the two support blocks.

9. The porous media burner according to claim 8, characterized in that: The fixing member is arranged on the outer wall of the cylindrical shell and divides the airflow accommodating chamber into a first airflow channel and a second airflow channel. The first airflow channel is connected to the first airflow space and separated from the second airflow space. The second airflow channel is connected to the second airflow space.

10. A combustion device, characterized in that: It comprises a combustion mixing mechanism and the porous medium burner according to any one of claims 1 to 6, wherein the combustion mixing mechanism is used for mixing fuel gas and combustion-supporting gas, and the gas outlet end of the combustion mixing mechanism is connected to the opening of the cylindrical shell.

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