Burner for biomass particle stove

Abstract

The utility model discloses a combustor for a biomass particle stove, which comprises a combustion cylinder, a buffer gas supply chamber, an ignition device and a gas supply pipeline, and the combustion cylinder is of an integrated hollow structure formed by a combustion chamber, a material supply chamber and a secondary combustion chamber; the buffering gas supply chamber is arranged on the outer side face of the combustion chamber and communicated with the combustion chamber, and a feeding hole is formed in the side face of the gas supply chamber; the gas supply pipeline comprises a combustion oxygen supply pipeline and a secondary oxygen supply pipeline, and the secondary combustion chamber is connected with the buffer gas supply chamber through the secondary oxygen supply pipeline; the ignition device is arranged in the combustion chamber and extends outwards to the outer side of the combustion chamber, and the ignition device is connected with the buffer gas supply chamber through a combustion oxygen supply pipeline; a material-saving grate bridge is arranged in the combustion chamber, and an ash blocking ring is arranged on the top of the secondary combustion chamber. According to the combustor, fuel can be fully combusted, the ignition device can be protected, and the combustor is simple in overall structure, convenient to operate and use, safe, practical and worthy of application and popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion stoves using biomass energy particles as fuel, in particular to a burner used for biomass particle stoves. Background Art

[0002] Biomass pellet fuel is primarily made from compressed biomass materials (such as sawdust, straw, and rice husks). Since biomass pellet fuel primarily uses agricultural and forestry waste, converting it into fuel not only reduces reliance on traditional fossil fuels but also effectively utilizes waste resources. Compared to traditional fuels, biomass pellet fuel offers significant energy-saving advantages. Due to its high calorific value, biomass pellet fuel can provide stable and long-lasting heat, thereby reducing energy consumption. Furthermore, biomass pellet fuel has high combustion efficiency, enabling more efficient fuel utilization and reducing energy waste. Therefore, biomass pellet fuel, as a renewable energy source, has gradually attracted attention.

[0003] Currently used biomass pellet stoves primarily consist of a panel, a furnace body, and a furnace core. The lower side of the furnace body is equipped with a furnace bridge, a fireproof plate, and an ash box. The side of the furnace body is equipped with a fuel tank and smoke outlet. It is also equipped with an ignition rod, a fan, and a charging device. The main problems with existing biomass pellet stoves in practice are: The fuel is delivered to the furnace through the charging device, ignited by the ignition rod located below the furnace, and then burned on the furnace bridge at the bottom of the furnace. First, the temperature at the bottom of the furnace core is high, which can easily damage the ignition rod. Second, the added fuel is located on the furnace bridge, and air can only be introduced into the furnace core from the bottom of the bridge. This prevents air outside the furnace core from effectively assisting the secondary combustion of the fuel inside the furnace core, resulting in incomplete combustion. Third, after the fuel burns at high temperatures, it forms a highly sticky ash scale that is difficult to pass freely through the furnace bridge and into the ash hopper, thus easily blocking the furnace and causing flameout.

[0004] A search revealed that patent document CN201748481U, with authorization publication number CN201748481U, discloses a burner for a biomass pellet fuel furnace; patent document CN110006032A, with application publication number CN110006032A, discloses a biomass burner; and patent document CN219607161U, with authorization publication number CN219607161U, discloses a biomass anti-slagging burner. These three patent documents each provide a burner that meets the requirements from different perspectives. To improve fuel combustion efficiency and fully utilize the generated heat, a burner different from the prior art is provided. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a burner with simple structure and easy operation in response to the problems existing in the background technology. By utilizing the burner and applying it to a biomass pellet stove, not only can the fuel be fully burned, but also ash and dirt can be prevented from blocking the chamber. At the same time, it can also protect the ignition device, thereby increasing the service life of the ignition rod. Specifically, the burner is a burner for a biomass pellet stove.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a burner for a biomass pellet stove, comprising a combustion tube, a buffer air supply chamber, an ignition device and an air supply pipe, the combustion tube is composed of a lower combustion chamber, a middle feeding chamber and an upper secondary combustion chamber to form an integrated hollow structure; the buffer air supply chamber is arranged on the outer side of the combustion chamber and is communicated with the combustion chamber, and a feeding hole communicating with its inner cavity is provided on the side of the feeding chamber; the air supply pipe includes a combustion oxygen supply pipe and a secondary oxygen supply pipe, and the secondary combustion chamber and the buffer air supply chamber are connected by the secondary oxygen supply pipe; the ignition device is arranged in the combustion chamber and extends outward to the outside of the combustion chamber, and the ignition device and the buffer air supply chamber are connected by the combustion oxygen supply pipe; a material-saving furnace bridge is also provided in the combustion chamber, and an ash retaining ring communicating with its inner cavity is provided on the top of the secondary combustion chamber.

[0007] Furthermore, a burner for a biomass pellet stove as described in the utility model is adopted, and an oxygen supply sleeve is provided on the outer periphery of the combustion tube, and the oxygen supply sleeve includes a combustion oxygen supply sleeve and a secondary combustion oxygen supply sleeve, wherein the combustion oxygen supply sleeve is located on the outer periphery of the combustion chamber, and a combustion oxygen supply cavity is formed between the inner side of the combustion oxygen supply sleeve and the outer side of the combustion tube, and the secondary combustion oxygen supply sleeve is located on the outer periphery of the secondary combustion chamber, and a secondary combustion oxygen supply cavity is formed between the inner side of the secondary combustion oxygen supply sleeve and the outer side of the combustion tube, and a plurality of oxygen supply holes that are connected to the combustion oxygen supply cavity and the secondary combustion oxygen supply cavity are respectively provided on the side of the combustion tube along its circumference; the buffer air supply chamber is arranged on the outer side of the combustion oxygen supply sleeve, and an oxygen inlet hole that is connected to the buffer air supply chamber is opened on the side of the combustion oxygen supply sleeve, and the buffer air supply chamber is connected to the secondary combustion oxygen supply cavity through a secondary oxygen supply pipe; and the ignition device arranged in the combustion chamber extends outward to the outer side of the combustion oxygen supply sleeve away from the side of the buffer air supply chamber.

[0008] Furthermore, a burner for a biomass pellet stove described in the present invention is adopted, the buffer air supply chamber is arranged as a shell structure with an air storage cavity, the buffer air supply chamber and the combustion oxygen supply sleeve are fixedly connected to form an integrated structure by welding, and an air inlet pipe interface communicating with its inner cavity is provided at the top of the buffer air supply chamber, and two pipe joints communicating with its inner cavity are provided on the side of the buffer air supply chamber, which are respectively an ignition pipe joint and a secondary oxygen supply pipe joint; an oxygen supply pipe joint communicating with the secondary combustion oxygen supply cavity is provided on the side of the secondary combustion oxygen supply sleeve, the secondary oxygen supply pipe joint and the oxygen supply pipe joint are connected by a secondary oxygen supply pipe, and oxygen is supplied to the secondary combustion oxygen supply cavity through the secondary oxygen supply pipe; and the ignition pipe joint and the ignition device are connected by a combustion oxygen supply pipe, and oxygen is supplied to the ignition device through the combustion oxygen supply pipe.

[0009] Furthermore, a burner for a biomass pellet stove described in the utility model is adopted, the ignition device includes an ignition rod, a three-way pipe and a protective tube, the three-way pipe includes a first pipe joint, a second pipe joint and a third pipe joint, wherein the first pipe joint and the second pipe joint are symmetrically arranged at both ends of the three-way pipe, and the third pipe joint is arranged in the middle of the three-way pipe; the ignition rod is screwed to the three-way pipe through the first pipe joint, and extends outward to the outside of the three-way pipe through the second pipe joint, one end of the protective tube is screwed to the three-way pipe through the second pipe joint, and the other end passes through the combustion oxygen supply sleeve and extends inward to the fuel-saving furnace bridge in the combustion chamber; the ignition rod extending to the outside of the three-way pipe extends inwardly into the protective tube in the fuel-saving furnace bridge located in the combustion chamber, and a heat supply channel is formed between the ignition rod in the protective tube and the inner wall surface of the protective tube; the combustion oxygen supply pipeline is screwed to the three-way pipe through the third pipe joint, and oxygen is supplied to the protection tube in the ignition device through the combustion oxygen supply pipeline.

[0010] Furthermore, a burner for a biomass pellet stove described in the utility model is adopted, and the material-saving furnace bridge includes an air guide plate and a furnace bridge plate. There are two air guide plates, and the two air guide plates are fixed on the furnace bridge plate in an inclined state. A plurality of evenly arranged air guide holes are provided in the air guide plate, and an ignition through hole corresponding to the protective tube is provided in the air guide plate, and an ash discharge hole is provided in the furnace bridge plate; the material-saving furnace bridge is detachably arranged in the combustion chamber in the combustion tube.

[0011] Furthermore, a burner for a biomass pellet stove as described in the present invention is adopted, wherein the furnace bridge plate is configured as a rectangular structure, with arc transition structures provided at both ends, and its length is smaller than the inner diameter of the combustion tube, and the ash discharge hole is arranged in the middle of the furnace bridge plate along the length direction of the furnace bridge plate; and the air guide plate is configured as an arc structure, and the two air guide plates are symmetrically arranged on both sides of the furnace bridge plate, and a V-shaped one-piece molded structure with the opening facing upward is formed between the two air guide plates and the furnace bridge plate.

[0012] Furthermore, the burner for a biomass pellet stove described in the present invention is used, and the burner also includes an ash guide cylinder coaxially arranged with the combustion cylinder, and the ash guide cylinder is fixed to the bottom of the combustion chamber.

[0013] Furthermore, a burner for a biomass pellet stove described in the utility model is used, and an ash blocking device is also provided at the bottom of the ash guide tube, the ash blocking device includes a support frame, a fire sealing plate, a connecting rod and an ash discharge rod, the fire sealing plate is arranged in a circular structure, and its outer diameter is larger than the outer diameter of the ash guide tube, the support frame is arranged on the outer side of the ash guide tube, two connecting rods are provided on one side of the fire sealing plate, and an ash discharge rod is provided on the other side, the fire sealing plate is movably connected to the support frame through two connecting rods, and the ash discharge rod extends outward to the outside of the stove, and under the action of external force, the fire sealing plate and the bottom of the ash guide tube are opened or closed by moving the ash discharge rod back and forth.

[0014] Furthermore, a burner for a biomass pellet stove as described in the utility model is used, and an ash discharge rod is provided on the surface of the fire sealing plate. The top end of the ash discharge rod passes upward through the ash guide tube and extends into the ash discharge hole in the furnace bridge plate.

[0015] Furthermore, a burner for a biomass pellet stove as described in the utility model is adopted, wherein the ash keepout ring is arranged as a cylindrical structure with an open top, the outer diameter of the ash keepout ring is larger than the outer diameter of the combustion tube, a fire exhaust hole corresponding to the combustion tube is provided at the bottom of the ash keepout ring, and a plurality of transversely arranged smoke guide holes are provided on the side of the ash keepout ring along its semi-circular direction, and a plurality of supporting connecting members are provided along its circumference at the fire exhaust hole in the ash keepout ring, the supporting connecting members extend downward to the outside of the ash keepout ring, and the ash keepout ring extends into the combustion tube through the supporting connecting members and is detachably arranged at the top of the secondary combustion chamber.

[0016] The burner for biomass pellet stoves described in the utility model has the advantages that, firstly, an oxygen supply sleeve is provided on the outer periphery of the combustion tube, a combustion oxygen supply chamber and a secondary combustion oxygen supply chamber are formed between the oxygen supply sleeve and the combustion tube, and a buffer air supply chamber is configured, and air can be supplied to the buffer air supply chamber under the action of an external fan, and air can be supplied to the ignition device and the secondary combustion chamber respectively under the action of an air supply pipe, and at the same time, air can be supplied to the combustion chamber by using an oxygen inlet hole provided on the side of the combustion oxygen supply sleeve, which, in addition to providing oxygen during ignition, can also participate in the secondary combustion, thereby making the fuel burn more fully, thus improving the combustion efficiency of the fuel; at the same time, it is advantageous to By supplying air to the ignition device, it can also cool down and protect the ignition rod in the ignition device, thereby increasing the service life of the ignition rod; secondly, since a fuel-saving furnace bridge is also provided in the combustion chamber, the fuel-saving furnace bridge is provided as a V-shaped structure with the opening facing upward. Through the provided fuel-saving furnace bridge, the added fuel is gathered at the bottom of the fuel-saving furnace bridge, and through the air guide holes provided in the air guide plate and the ash discharge holes in the furnace bridge plate, not only the fuel consumption can be reduced, but also ignition and ash discharge are convenient. At the same time, through the multiple air guide holes provided in the air guide plate, air can be transported from the bottom of the combustion chamber into the combustion chamber, which can further improve the combustion efficiency of the fuel above the fuel-saving furnace bridge.

[0017] Third, an ash guide tube is provided at the bottom of the combustion chamber, and an ash blocking device is also provided at the bottom of the ash guide tube. Through the cooperation of the ash guide tube and the ash blocking device, the ash after combustion can be collected in the ash guide tube first, and then extended upward to the ash discharge hole in the furnace bridge plate through the ash discharge rod in the ash blocking device, which can effectively avoid the problem of ash blocking the chamber; Fourth, through the ash blocking ring set at the top of the secondary combustion chamber, the heat and flue gas generated after the combustion of the fuel can be discharged from multiple vertically arranged smoke guide holes, run around the ash blocking ring for one circle, and finally discharged to the outside from the side where no smoke guide hole is set, which can effectively utilize the heat in the exhaust flue gas.

[0018] It can be seen that the use of the burner described in the utility model and its application in biomass pellet stoves can not only make the fuel burn fully, thereby improving combustion efficiency, reducing fuel consumption, reducing usage costs, and achieving the purpose of energy conservation and emission reduction, but also avoid the problem of ash and dirt blocking the chamber. At the same time, it can also protect the ignition device, thereby increasing the service life of the ignition rod. Its overall structure is simple, easy to operate and use, safe and practical, and worthy of promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in further detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of Example 1 of the utility model Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of Example 1 of the utility model Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the partial cross-sectional structure of Example 1 of the present utility model;

[0023] Figure 4 This is a schematic structural diagram of the ignition device of the present invention;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the ignition device of the present invention;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the material-saving furnace bridge of the utility model;

[0026] Figure 7 This is a schematic diagram of the three-dimensional structure of Example 2 of the present utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the material-saving furnace bridge and the ash blocking device during installation in Example 2;

[0028] Figure 9 This is a schematic diagram of the three-dimensional structure of Example 3 of the present utility model;

[0029] Figure 10 This is a schematic diagram of the three-dimensional structure of the dust retaining ring described in Example 3.

[0030] As shown in the figure:

[0031] 1-combustion tube, 11-combustion chamber, 12-feeding chamber, 13-secondary combustion chamber, 14-feeding hole, 15-oxygen supply hole;

[0032] 2-buffer air supply chamber, 21-air inlet pipe interface, 22-ignition pipe joint, 23-secondary oxygen supply pipe joint, 24-oxygen supply pipe joint;

[0033] 3- ignition device, 31- ignition rod, 32- three-way pipe, 33- protection tube;

[0034] 4-gas supply pipeline, 41-combustion oxygen supply pipeline, 42-secondary oxygen supply pipeline;

[0035] 5- material-saving furnace bridge, 51- air guide plate, 52- furnace bridge plate, 53- air guide hole, 54- ash discharge hole;

[0036] 6- oxygen supply sleeve, 61- combustion oxygen supply sleeve, 62- secondary combustion oxygen supply sleeve, 63- combustion oxygen supply chamber, 64- secondary combustion oxygen supply chamber, 65- oxygen inlet hole;

[0037] 7-ash guide tube;

[0038] 8-ash blocking device, 81-support frame, 82-fire sealing plate, 83-connecting rod, 84-ash discharge rod, 85-ash discharge rod;

[0039] 9-ash retaining ring, 91-fire exhaust hole, 92-smoke guide hole, 93-support connecting piece. DETAILED DESCRIPTION

[0040] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0041] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology. They are not used to limit the conditions for the implementation of this utility model and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose of the utility model. At the same time, the terms such as "upper", "lower", "left", "right", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of this utility model without substantially changing the technical content.

[0042] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "provided with" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0043] It should be noted that the term "comprise" or any other variation is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus. Example 1

[0044] like Figures 1 to 6As shown, a burner for a biomass pellet stove described in this embodiment includes a combustion tube 1, a buffer air supply chamber 2, an ignition device 3 and an air supply pipe 4, and the combustion tube 1 is composed of a lower combustion chamber 11, a middle feeding chamber 12 and an upper secondary combustion chamber 13 to form an integrated hollow structure; the buffer air supply chamber 2 is arranged on the outer side of the combustion chamber 11 and communicates with the combustion chamber 11, and a feeding hole 14 communicating with its inner cavity is provided on the side of the feeding chamber 12; the air supply pipe 4 includes a combustion oxygen supply pipe 41 and a secondary oxygen supply pipe 42, and the secondary combustion chamber 13 is connected to the buffer air supply chamber 2 through the secondary oxygen supply pipe 42; the ignition device 3 is arranged in the combustion chamber 11 and extends outward to the outside of the combustion chamber 11, and the ignition device 2 is connected to the buffer air supply chamber 2 through the combustion oxygen supply pipe 41; a material-saving furnace bridge 5 is also provided in the combustion chamber 11, and an ash retaining ring 9 communicating with its inner cavity is provided on the top of the secondary combustion chamber 13.

[0045] Furthermore, the burner described in this embodiment is used, and an oxygen supply sleeve 6 is provided on the outer periphery of the combustion tube 1, and the oxygen supply sleeve 6 includes a combustion oxygen supply sleeve 61 and a secondary combustion oxygen supply sleeve 62, wherein the combustion oxygen supply sleeve 61 is located on the outer periphery of the combustion chamber 3, and a combustion oxygen supply cavity 63 is formed between the inner side of the combustion oxygen supply sleeve 61 and the outer side of the combustion tube 1, and the secondary combustion oxygen supply sleeve 62 is located on the outer periphery of the secondary combustion chamber 13, and a secondary combustion oxygen supply cavity 64 is formed between the inner side of the secondary combustion oxygen supply sleeve 62 and the outer side of the combustion tube 1, and The side of the combustion tube 1 is provided with a plurality of oxygen supply holes 15 along its circumference, which are connected to the combustion oxygen supply chamber 63 and the secondary combustion oxygen supply chamber 64; the buffer air supply chamber 2 is arranged on the outer side of the combustion oxygen supply sleeve 61, and an oxygen inlet hole 65 connected to the buffer air supply chamber 2 is opened on the side of the combustion oxygen supply sleeve 61, and the buffer air supply chamber 2 is connected to the secondary combustion oxygen supply chamber 64 through the secondary oxygen supply pipe 42; and the ignition device 3 arranged in the combustion chamber 11 extends outward to the outside of the combustion oxygen supply sleeve 61 away from the side of the buffer air supply chamber 2.

[0046] Furthermore, the burner described in this embodiment is adopted, and the buffer air supply chamber 2 is configured as a shell structure having an air storage cavity, and the buffer air supply chamber 2 and the combustion oxygen supply sleeve 61 are fixedly connected to form an integral structure by welding, and an air inlet pipe interface 21 communicating with its inner cavity is provided on the top of the buffer air supply chamber 2, and two pipe joints communicating with its inner cavity are provided on the side of the buffer air supply chamber 2, namely an ignition pipe joint 22 and a secondary oxygen supply pipe joint 23; an oxygen supply pipe joint 24 communicating with the secondary combustion oxygen supply cavity 64 is provided on the side of the secondary combustion oxygen supply sleeve 62, and the secondary oxygen supply pipe joint 23 and the oxygen supply pipe joint 24 are connected by a secondary oxygen supply pipe 42, and oxygen is supplied to the secondary combustion oxygen supply cavity 64 through the secondary oxygen supply pipe 42; and the ignition pipe joint 22 and the ignition device 3 are connected by a combustion oxygen supply pipe 41, and oxygen is supplied to the ignition device 3 through the combustion oxygen supply pipe 41.

[0047] Furthermore, the burner described in this embodiment is used, and the ignition device 3 includes an ignition rod 31, a three-way pipe 32 and a protective tube 33. The three-way pipe 32 includes a first pipe joint, a second pipe joint and a third pipe joint, wherein the first pipe joint and the second pipe joint are symmetrically arranged at both ends of the three-way pipe 32, and the third pipe joint is arranged in the middle of the three-way pipe 32; the ignition rod 31 is screwed to the three-way pipe 32 through the first pipe joint, and extends outward through the second pipe joint to the outside of the three-way pipe 32, and one end of the protective tube 33 is screwed to the third pipe joint. The second pipe joint is screwed to the three-way pipe 32, and the other end passes through the combustion oxygen supply sleeve 61 and extends inward to the fuel-saving furnace bridge 5 in the combustion chamber 11; and the ignition rod 31 extending to the outside of the three-way pipe 32 extends inward into the protective tube 33 in the fuel-saving furnace bridge 5 in the combustion chamber 11, and a heat supply channel is formed between the ignition rod 31 in the protective tube 33 and the inner wall surface of the protective tube 33; the combustion oxygen supply pipeline 41 is screwed to the three-way pipe 32 through the third pipe joint, and oxygen is supplied to the protective tube 33 in the ignition device 3 through the combustion oxygen supply pipeline 41.

[0048] The ignition device 3 operates by connecting the ignition rod 31 to an external power source, causing the ignition rod 31 to heat and turn red. Simultaneously, air is delivered to the protective tube 33 via the combustion oxygen supply pipe 41. The delivered air, after being heated by the ignition rod 31, heats the fuel in the furnace combustion chamber 11, thereby achieving ignition. Furthermore, the combustion oxygen supply pipe 41 can also be used to deliver air to the protective tube 33, providing a cooling and protective effect on the ignition rod 31 after it has completed its ignition task. Furthermore, since the protective tube 33 is disposed outside the ignition rod 31, the protective tube 33 can be made of a high-temperature resistant metal material. When the ignition rod 31 is not in operation after ignition, the protective tube 33 delivers air to the protective tube 33, providing oxygen and cooling the ignition rod 31. This protects the ignition rod 31 and prevents damage to the ignition rod 31 in high-temperature environments, thereby increasing its service life.

[0049] Furthermore, the burner described in this embodiment is used, and the fuel-saving furnace bridge 5 includes an air guide plate 51 and a furnace bridge plate 52. There are two air guide plates 51, and the two air guide plates 51 are fixed on the furnace bridge plate 52 in an inclined state. A plurality of evenly arranged air guide holes 53 are provided in the air guide plate 51, and an ignition through hole 55 corresponding to the protective tube 33 is provided in the air guide plate 51, and an ash discharge hole 54 is provided in the furnace bridge plate 52; the fuel-saving furnace bridge 5 is detachably arranged in the combustion chamber 11 in the combustion tube 1, wherein the ignition rod 31 extends inwardly into the air guide plate 51 in the fuel-saving furnace bridge 5 located in the combustion chamber 11.

[0050] During the specific manufacturing process, the fuel-saving furnace bridge 5 adopts a circular plate that matches the inner diameter of the combustion tube 1, and is formed into a V-shaped one-piece molded structure with the opening facing upward through machine pressing, wherein the ash discharge hole 54 is arranged in the middle of the furnace bridge plate 52 along the length direction of the furnace bridge plate 52, and the ignition through hole 55 is horizontally arranged in one of the air guide plates 51, and a plurality of air guide holes 53 arranged perpendicular to the air guide plates 51 are opened in the air guide plates 51 on both sides. Through the ignition through hole 55 arranged in the air guide plate 51, the ignition rod 31 located in the combustion chamber 11 can be extended into the fuel-saving furnace bridge 5 through the protective tube 33, so as to facilitate the ignition of the fuel.

[0051] During the installation and use of the fuel-saving furnace bridge 5, the fuel-saving furnace bridge 5 is detachably installed in the combustion chamber 11, and the furnace bridge plate 52 is used to contact the inner wall surface of the combustion chamber 11, while the air guide plates 51 arranged symmetrically on both sides are in contact with the inner wall surface of the combustion chamber 11 in an inclined state. The fuel-saving furnace bridge 5 is set as a V-shaped structure with the opening facing upward. Through the setting of the fuel-saving furnace bridge 5, the added fuel is gathered at the bottom of the fuel-saving furnace bridge 5, and through the air guide holes 53 set in the air guide plate 51 and the ash discharge holes 54 in the furnace bridge plate 52, not only can the fuel consumption be reduced, but also ignition and ash discharge are convenient. At the same time, through the multiple air guide holes 53 set in the air guide plate 51, air can be transported from the bottom of the combustion chamber 11 into the combustion chamber 11, which can further improve the combustion efficiency of the fuel located in the fuel-saving furnace bridge 5. In the actual production process, since the protective tube 33 passes through the air guide plate 51 and extends into the material-saving furnace bridge 5, the protective tube 33 can play a supporting role. At the same time, in order to further improve the stability of the material-saving furnace bridge 5 and prevent the material-saving furnace bridge 5 from shaking and causing instability, a block corresponding to the furnace bridge plate 52 can be set on the inner wall surface of the combustion chamber 11 (not shown in the figure). The furnace bridge plate 52 is supported by the set block, which can improve the stability of the material-saving furnace bridge 5. At the same time, the material-saving furnace bridge 5 is set to a detachable connection mode, which is also convenient for replacement. Example 2

[0052] This embodiment is based on the first embodiment. To facilitate the free discharge of ash and slag from the combustion chamber 11 and avoid ash blockage, and to ensure more complete combustion of added fuel, facilitate adjustment of the firepower, and achieve fuel conservation, the burner of this embodiment further includes an ash guide tube 7 coaxially arranged with the combustion tube 1 and fixed to the bottom of the combustion chamber 11. At the same time, an ash blocking device 8 is also provided at the bottom of the ash guide tube 7. The ash blocking device 8 includes a support frame 81, a fire sealing plate 82, a connecting rod 83, and an ash discharge rod 84. The fire sealing plate 82 is arranged in a circular structure, and its outer diameter is larger than the outer diameter of the ash guide tube 7. The support frame 81 is arranged on the outer side of the ash guide tube 7. Two connecting rods 83 are provided on one side of the fire sealing plate 82, and an ash discharge rod 84 is provided on the other side. The fire sealing plate 82 is movably connected to the support frame 81 through the two connecting rods 83. The ash discharge rod 84 extends outward to the outside of the furnace. Under the action of external force, the ash discharge rod 84 is moved back and forth to open or close the fire sealing plate 82 and the bottom of the ash guide tube 7. In addition, to prevent the problem of ash and dirt blocking the chamber, an ash discharge rod 85 is also provided on the surface of the fire sealing plate 82. The top end of the ash discharge rod 85 passes upward through the ash guide tube 7 and extends into the ash discharge hole 54 in the furnace bridge plate 52.

[0053] During specific use, the ash discharge rod 85 set on the fire sealing plate 82 is manually pulled outward by an external force, so that the fire sealing plate 82 and the bottom of the ash guide tube 7 are in an open state. The ash discharge rod 85 can stir the ash in the furnace bridge plate 52 in the process of moving with the fire sealing plate 82 to avoid the formation of ash, and the ash produced by combustion can freely fall into the ash hopper through the furnace bridge to avoid the formation of ash blockage and flameout. Example 3

[0054] This embodiment is based on Example 2. To fully utilize the heat generated by fuel combustion, it prevents smoke from being directly discharged into the smoke pipe through the smoke exhaust hole, thereby reducing heat loss. In the burner described in this embodiment, the ash retaining ring 9 is configured as a cylindrical structure with an open top. The outer diameter of the ash retaining ring 9 is larger than the outer diameter of the combustion tube 1. A fire exhaust hole 91 corresponding to the combustion tube 1 is provided at the bottom of the ash retaining ring 9. Multiple transversely arranged smoke guide holes 92 are provided along the side of the ash retaining ring 9 along its semicircular direction. Multiple supporting connectors 93 are provided along the circumference of the fire exhaust hole 91 within the ash retaining ring 9. The supporting connectors 93 extend downward to the outside of the ash retaining ring 9. The ash retaining ring 9 extends into the combustion tube 1 through the supporting connectors 93 and is detachably mounted on the top of the secondary combustion chamber 13. Furthermore, the provision of the supporting connectors 93 facilitates determining the installation direction of the ash retaining ring 9. In the specific manufacturing process, the smoke guide holes 92 are configured as four evenly spaced transverse openings along the semicircular direction of the ash retaining ring 9.

[0055] During specific use, the ash retaining ring 9 can be placed on the top of the secondary combustion chamber 13 through the configuration, and the circumferential surface on the side with the smoke guide hole 92 is required to face the smoke exhaust hole of the stove, while the circumferential surface on the side without the smoke guide hole 92 faces the smoke exhaust hole of the stove. In this way, the heat and smoke generated after the combustion of the fuel can be discharged from multiple vertically arranged smoke guide holes 92, run around the ash retaining ring 9 for a circle, and finally be discharged to the outside from the side without the smoke guide hole 92. This can effectively utilize the heat in the exhaust smoke. At the same time, the smoke generated after the combustion of the fuel can also be collected at the bottom of the ash retaining ring 9 to prevent the smoke from falling into the combustion tube 1 and affecting the combustion of the fuel.

[0056] The burner for biomass pellet stoves described in the utility model is applied to biomass pellet stoves. Compared with existing biomass pellet stoves, its advantages are mainly reflected in the following aspects:

[0057] First, through the configuration of the buffer air supply chamber 2 and the oxygen supply sleeve 6 arranged on the outer periphery of the combustion tube 1, a combustion oxygen supply chamber 63 and a secondary combustion oxygen supply chamber 64 are formed between the oxygen supply sleeve 6 and the combustion tube 1, and through the configuration of the buffer air supply chamber 2, under the action of the external fan, air can be supplied to the buffer air supply chamber 2, and under the action of the air supply pipe 4, air can be supplied to the ignition device 3 and the secondary combustion chamber 13 respectively. At the same time, the oxygen inlet hole 65 arranged on the side of the combustion oxygen supply sleeve 61 can be used to supply air to the combustion chamber 11. In addition to providing oxygen during ignition, it can also participate in the secondary combustion, so that the fuel burns more fully, which can improve the combustion efficiency of the fuel. At the same time, by supplying air to the ignition device 3, the ignition rod 31 in the ignition device 3 can also be cooled and protected, thereby increasing the service life of the ignition rod 31.

[0058] Secondly, a fuel-saving furnace bridge 5 is provided in the combustion chamber 11. The fuel-saving furnace bridge 5 is configured as a V-shaped structure with the opening facing upward. The fuel-saving furnace bridge 5 allows the added fuel to gather at the bottom of the fuel-saving furnace bridge 5 and pass through the air guide holes 53 provided in the air guide plate 51 and the ash discharge holes 54 in the furnace bridge plate 52, which not only reduces the fuel consumption but also facilitates ignition and ash discharge.

[0059] Third, an ash guide tube 7 is provided at the bottom of the combustion chamber 11, and an ash retaining device 8 is also provided at the bottom of the ash guide tube 7. Through the cooperation between the ash guide tube 7 and the ash retaining device 8, the ash after combustion is first collected in the ash guide tube 7 and then extends upward through the ash discharge rod 85 in the ash retaining device 8 to the ash discharge hole 54 in the furnace bridge plate 52, which can effectively avoid the problem of ash clogging the furnace.

[0060] Fourthly, by means of the ash retaining ring 9 arranged at the top of the secondary combustion chamber 13, the heat and smoke generated after the fuel combustion can be discharged from a plurality of vertically arranged smoke guide holes 92, run around the ash retaining ring 9 for one circle, and finally be discharged outwardly from the side where no smoke guide holes 92 are set, so that the heat in the exhaust smoke can be effectively utilized.

[0061] In addition, the burner described in the present invention, the ignition rod 31 in the ignition device 3 is a common device in the prior art and can be directly purchased on the existing market without changing its structure. It is applied to the present invention for the purpose of facilitating ignition. Therefore, there is no requirement for its specific model or specification, as long as it matches each other and meets the use requirements.

[0062] To sum up, the use of the burner described in the utility model and its application in biomass pellet stoves can not only make the fuel burn fully, thereby improving combustion efficiency, reducing fuel consumption, reducing usage costs, and achieving the purpose of energy conservation and emission reduction, but also avoid the problem of ash and dirt blocking the chamber. At the same time, it can also protect the ignition device, thereby increasing the service life of the ignition rod. Its overall structure is simple, easy to operate and use, safe and practical, and worthy of promotion and use.

[0063] Other aspects of the present invention that are not described in detail are all conventional technologies known to those skilled in the art.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A burner for a biomass pellet stove, comprising a combustion tube (1), a buffer air supply chamber (2), an ignition device (3) and an air supply pipe (4), characterized in that: The combustion tube (1) is composed of a lower combustion chamber (11), a middle feeding chamber (12) and an upper secondary combustion chamber (13) forming an integral hollow structure; the buffer air supply chamber (2) is arranged on the outer side of the combustion chamber (11) and is communicated with the combustion chamber (11); a feeding hole (14) is provided on the side of the feeding chamber (12) and is communicated with the inner cavity thereof; the air supply pipe (4) includes a combustion oxygen supply pipe (41) and a secondary oxygen supply pipe (42); the secondary combustion chamber (43) is provided with a plurality of air supply pipes (41) and a plurality of air supply pipes (42). The combustion chamber (13) and the buffer air supply chamber (2) are connected via a secondary oxygen supply pipe (42); the ignition device (3) is arranged in the combustion chamber (11) and extends outward to the outside of the combustion chamber (11); the ignition device (3) and the buffer air supply chamber (2) are connected via a combustion oxygen supply pipe (41); a material-saving grate bridge (5) is also provided in the combustion chamber (11), and an ash retaining ring (9) communicating with the inner cavity of the secondary combustion chamber (13) is provided at the top.

2. The burner for a biomass pellet stove according to claim 1, characterized in that: An oxygen supply sleeve (6) is provided on the outer periphery of the combustion tube (1), and the oxygen supply sleeve (6) includes a combustion oxygen supply sleeve (61) and a secondary combustion oxygen supply sleeve (62), wherein the combustion oxygen supply sleeve (61) is located on the outer periphery of the combustion chamber (11), and a combustion oxygen supply cavity (63) is formed between the inner side of the combustion oxygen supply sleeve (61) and the outer side of the combustion tube (1), and the secondary combustion oxygen supply sleeve (62) is located on the outer periphery of the secondary combustion chamber (13), and a secondary combustion oxygen supply cavity (64) is formed between the inner side of the secondary combustion oxygen supply sleeve (62) and the outer side of the combustion tube (1), and a secondary combustion oxygen supply cavity (64) is formed on the side of the combustion tube (1). A plurality of oxygen supply holes (15) communicating with the combustion oxygen supply chamber (63) and the secondary combustion oxygen supply chamber (64) are respectively provided in the circumference thereof; the buffer air supply chamber (2) is arranged on the outer side of the combustion oxygen supply sleeve (61), and an oxygen inlet hole (65) communicating with the buffer air supply chamber (2) is opened on the side of the combustion oxygen supply sleeve (61); the buffer air supply chamber (2) is communicated with the secondary combustion oxygen supply chamber (64) through the secondary oxygen supply pipe (42); and the ignition device (3) arranged in the combustion chamber (11) extends outward to the outer side of the combustion oxygen supply sleeve (61) away from the buffer air supply chamber (2).

3. The burner for a biomass pellet stove according to claim 2, characterized in that: The buffer air supply chamber (2) is configured as a shell structure having an air storage cavity. The buffer air supply chamber (2) and the combustion oxygen supply sleeve (61) are fixedly connected to form an integral structure by welding. An air inlet pipe interface (21) communicating with the inner cavity of the buffer air supply chamber (2) is provided on the top of the buffer air supply chamber (2). Two pipe joints communicating with the inner cavity of the buffer air supply chamber (2) are provided on the side of the buffer air supply chamber (2), which are respectively an ignition pipe joint (22) and a secondary oxygen supply pipe joint (23); in the secondary combustion oxygen supply sleeve (62), An oxygen supply pipe joint (24) communicating with the secondary combustion oxygen supply chamber (64) is provided on the side. The secondary oxygen supply pipe joint (23) and the oxygen supply pipe joint (24) are connected via a secondary oxygen supply pipeline (42), and oxygen is supplied to the secondary combustion oxygen supply chamber (64) via the secondary oxygen supply pipeline (42); and the ignition pipe joint (22) and the ignition device (3) are connected via a combustion oxygen supply pipeline (41), and oxygen is supplied to the ignition device (3) via the combustion oxygen supply pipeline (41).

4. The burner for a biomass pellet stove according to claim 3, characterized in that: The ignition device (3) comprises an ignition rod (31), a three-way pipe (32) and a protective tube (33), wherein the three-way pipe (32) comprises a first pipe joint, a second pipe joint and a third pipe joint, wherein the first pipe joint and the second pipe joint are symmetrically arranged at both ends of the three-way pipe (32), and the third pipe joint is arranged in the middle of the three-way pipe (32); the ignition rod (31) is screwed to the three-way pipe (32) through the first pipe joint, and extends outwardly to the outside of the three-way pipe (32) through the second pipe joint, and one end of the protective tube (33) is screwed to the three-way pipe (32) through the second pipe joint. , the other end passes through the combustion oxygen supply sleeve (61) and extends inwardly to the fuel-saving furnace bridge (5) in the combustion chamber (11); and the ignition rod (31) extending to the outside of the three-way pipe (32) extends inwardly into the protection tube (33) in the fuel-saving furnace bridge (5) in the combustion chamber (11), and a heat supply channel is formed between the ignition rod (31) in the protection tube (33) and the inner wall surface of the protection tube (33); the combustion oxygen supply pipeline (41) is screwed to the three-way pipe (32) through a third pipe joint, and oxygen is supplied to the protection tube (33) in the ignition device (3) through the combustion oxygen supply pipeline (41).

5. The burner for a biomass pellet stove according to claim 4, characterized in that: The fuel-saving furnace bridge (5) includes an air guide plate (51) and a furnace bridge plate (52). Two air guide plates (51) are provided. The two air guide plates (51) are fixed on the furnace bridge plate (52) in an inclined state. A plurality of evenly arranged air guide holes (53) are provided in the air guide plate (51), an ignition through hole (55) corresponding to the protective tube (33) is provided in the air guide plate (51), and an ash discharge hole (54) is provided in the furnace bridge plate (52); the fuel-saving furnace bridge (5) is detachably arranged in the combustion chamber (11) in the combustion tube (1).

6. The burner for a biomass pellet stove according to claim 5, characterized in that: The furnace bridge plate (52) is configured as a rectangular parallelepiped structure, with arc transition structures at both ends thereof, and its length is smaller than the inner diameter of the combustion tube (1), and the ash discharge hole (54) is arranged in the middle of the furnace bridge plate (52) along the length direction of the furnace bridge plate (52); and the air guide plate (51) is configured as an arc structure, and the two air guide plates (51) are symmetrically arranged on both sides of the furnace bridge plate (52), and a V-shaped integrally formed structure with an opening facing upward is formed between the two air guide plates (51) and the furnace bridge plate (52).

7. The burner for a biomass pellet stove according to claim 5, characterized in that: The burner further comprises an ash guide cylinder (7) coaxially arranged with the combustion cylinder (1), and the ash guide cylinder (7) is fixed to the bottom of the combustion chamber (11).

8. The burner for a biomass pellet stove according to claim 7, characterized in that: An ash blocking device (8) is also provided at the bottom of the ash guide tube (7), and the ash blocking device (8) includes a support frame (81), a fire sealing plate (82), a connecting rod (83) and an ash discharge rod (84). The fire sealing plate (82) is arranged in a circular structure, and its outer diameter is larger than the outer diameter of the ash guide tube (7). The support frame (81) is arranged on the outer side surface of the ash guide tube (7), and two connecting rods (83) are provided on one side of the fire sealing plate (82), and an ash discharge rod (84) is provided on the other side. The fire sealing plate (82) is movably connected to the support frame (81) through the two connecting rods (83), and the ash discharge rod (84) extends outward to the outside of the stove. Under the action of external force, the fire sealing plate (82) and the bottom of the ash guide tube (7) are opened or closed by moving the ash discharge rod (84) back and forth.

9. The burner for a biomass pellet stove according to claim 8, characterized in that: An ash discharge rod (85) is also provided on the surface of the fire sealing plate (82). The top end of the ash discharge rod (85) passes through the ash guide cylinder (7) upward and extends into the ash discharge hole (54) in the furnace bridge plate (52).

10. The burner for a biomass pellet stove according to claim 1, characterized in that: The ash retaining ring (9) is configured as a cylindrical structure with an opening at the top, the outer diameter of the ash retaining ring (9) is larger than the outer diameter of the combustion tube (1), a fire exhaust hole (91) corresponding to the combustion tube (1) is provided at the bottom of the ash retaining ring (9), and a plurality of transversely arranged smoke guide holes (92) are provided on the side of the ash retaining ring (9) along its semicircular direction, and a plurality of supporting connecting members (93) are provided along its circumference at the fire exhaust hole (91) in the ash retaining ring (9), the supporting connecting members (93) extend downward to the outside of the ash retaining ring (9), and the ash retaining ring (9) extends into the combustion tube (1) through the supporting connecting member (93) and is detachably provided on the top of the secondary combustion chamber (13).

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