Burner capable of preventing hopper from burning

Abstract

The utility model discloses a combustion machine capable of preventing combustion of a hopper, the combustion machine capable of preventing combustion of the hopper comprises a preheating device, the preheating device is used for preheating fuel so as to increase the temperature of the fuel, and the preheating device comprises a gas collecting pipe, a plurality of gas spraying pieces and a plurality of air guiding pieces. The gas collecting pipe forms a gas inlet and a gas collecting cavity, and high-pressure gas enters the gas collecting cavity from the gas inlet; the plurality of gas spraying pieces are communicated with the gas collecting cavity, and the high-pressure gas in the gas collecting cavity is sprayed out through the gas spraying pieces; the air guide part forms an air cavity, the air cavity is arranged to be communicated with the nozzle of the air injection part, the air guide part further comprises a heat conduction wall located at the bottom of the air guide part, the heat conduction wall is in contact with fuel, and the nozzle of the air injection part faces the interior of the air cavity. Fuel before entering the combustion cavity is preheated through high temperature generated by high-pressure gas blown out of the nozzle, so that the ignition temperature of the fuel is reduced, and the purpose of preventing the hopper from being ignited is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a burner capable of preventing hopper combustion. Background Art

[0002] Burners are a common thermal energy equipment, usually used in heating equipment such as boilers and industrial furnaces. The basic working principle of a burner is to send fuel into the combustion chamber and mix it with the air in the combustion chamber for combustion. The released energy is converted into heat or mechanical energy to provide heat sources for industrial production and daily life. Burners can be divided into many types according to the type of fuel and the combustion method. Among them, biomass burners are more widely used. They use biomass fuels for combustion, such as wood chips, sawdust, straw, etc., which are low-cost and do not produce harmful gases during the combustion process.

[0003] Biomass fuel has the characteristics of high volatility and low ignition point. Specifically, at a certain temperature, when high-volatile biomass fuel is heated in an air-tight environment, more combustible gas is produced after the biomass fuel is thermally decomposed. In this way, the biomass fuel may ignite prematurely due to the ignition of the volatilized combustible gas. Too fast a burning speed will cause the heat of the biomass fuel to be too concentrated and damage the burner. In addition, since the flame temperature of the ignited biomass fuel is relatively low, the biomass fuel is very easy to be ignited during the transmission process of the burner, which may cause the hopper loaded with the biomass fuel to be burned, and in serious cases, may cause major accidents. Utility Model Content

[0004] In order to solve the above technical problems and achieve at least one advantage of the utility model, the utility model provides a burner capable of preventing hopper combustion, wherein the burner capable of preventing hopper combustion comprises a preheating device for preheating fuel to increase the temperature of the fuel, and the preheating device comprises:

[0005] An air collecting pipe, wherein the air collecting pipe forms a first air inlet and an air collecting cavity, and the first air inlet and the air collecting cavity are connected;

[0006] An injection member, wherein the injection member is implemented as a pipe member with two connected ports, the injection member forms a second air inlet and an injection port, the second air inlet is connected to the injection port, the second air inlet is connected to the air collecting cavity of the air collecting pipe, and the diameter of the injection port is much smaller than the diameter of the second air inlet;

[0007] An air guide member, wherein the air guide member includes a heat-conducting wall, the air guide member forms an air cavity, the jet port of the jet member is connected to the air cavity, the high-pressure gas enters the air collecting cavity through the first air inlet of the air collecting pipe, further passes through the second air inlet and is ejected from the jet port, the high-pressure gas ejected from the multiple jet ports forms an air curtain, and the air curtain is ejected into the air cavity.

[0008] According to an embodiment of the utility model, the burner capable of preventing hopper combustion further comprises:

[0009] A hopper, wherein the hopper forms a high end portion and a low end portion, wherein the hopper forms an upper material opening at the high end portion, and wherein the hopper forms a lower material opening at the low end portion, and wherein the hopper forms a hopper cavity between the upper material opening and the lower material opening;

[0010] A conveying device, the conveying device comprises a conveying pipe and a conveying assembly, the conveying assembly is installed on the conveying pipe, the outer wall of the conveying pipe is in contact with the heat-conducting wall, the conveying pipe forms a feed port and a discharge port, the feed port is connected with the discharge port, the feed port is connected with the discharge port of the hopper, the conveying pipe also forms a conveying cavity between the feed port and the discharge port, the fuel enters the conveying cavity from the feed port, the fuel in the conveying cavity is conveyed by the conveying assembly toward the discharge port, the preheating device is installed on the outer wall of the conveying pipe, and the preheating device is installed near the discharge port;

[0011] A burner, wherein the burner forms a high end portion and a low end portion, wherein the high end portion of the burner is disposed close to the discharge port of the conveying pipe, and the burner forms a combustion chamber, wherein the fuel is conveyed to the discharge port via the conveying assembly and then falls into the combustion chamber under the action of the fuel's own gravity for combustion.

[0012] A discharge device is arranged close to the burner, and the discharge device includes a smoke exhaust piece, and the smoke exhaust piece is implemented as a pipe with two ends connected, and the smoke exhaust piece forms a smoke exhaust port and a smoke exhaust cavity, and the smoke exhaust port and the smoke exhaust cavity are connected. The smoke exhaust piece is arranged to be connected to the combustion cavity of the burner at one end away from the smoke exhaust port, and the waste smoke generated after the fuel is burned in the burner enters the smoke exhaust cavity and is discharged into the atmosphere through the smoke exhaust port.

[0013] According to one embodiment of the utility model, the conveying assembly includes a conveying member and a rotating rod, the conveying member is implemented as a spiral blade, the conveying member is fixedly mounted on the rotating rod, and the rotating rod is driven and installed in the conveying chamber so as to rotate along its own axial direction. The rotating rod rotates, thereby driving the conveying member to rotate along the axial direction of the rotating rod.

[0014] According to an embodiment of the present invention, the transmission device further comprises a transmission driving member, and the transmission driving member is implemented as a motor to drive the rotating rod to rotate along its own axis.

[0015] According to an embodiment of the utility model, the air guide member further forms a plurality of exhaust holes at a position adjacent to the heat-conducting wall, so that the high-pressure gas sprayed into the wind cavity from the air jet port can be discharged from the exhaust holes.

[0016] According to one embodiment of the utility model, the preheating device also includes a regulating valve and a heat conductor, the regulating valve is installed on the air collecting pipe to control the airflow size of the high-pressure air entering the air collecting cavity of the air collecting pipe, and the heat conductor is implemented as a copper tube, the heat conductor is wound and installed on the smoke exhaust part, and fits with the side wall of the smoke exhaust part.

[0017] According to an embodiment of the utility model, the regulating valve forms a third air inlet and a first air outlet, and the third air inlet is arranged to be connected to the air collecting cavity of the air collecting pipe. The heat conducting member forms a fourth air inlet and a second air outlet, and the fourth air inlet is connected to the second air outlet. The second air outlet is connected to the third air inlet of the regulating valve, and the fourth air inlet is connected to the atmosphere.

[0018] According to an embodiment of the present invention, the preheating device further includes a fixing member, and the air collecting pipe is detachably mounted on the fixing member.

[0019] According to an embodiment of the utility model, the burner further comprises a nozzle, which is in communication with the combustion chamber, and the high-temperature combustion gas containing hydrogen, methane, carbon monoxide, etc. generated by the cracking of the fuel under high temperature conditions is discharged through the nozzle.

[0020] According to one embodiment of the utility model, the discharging device also includes a residue piece, the residue piece forms a residue chamber and a residue cleaning port, the residue cleaning port is connected to the residue chamber, the residue chamber is connected to the combustion chamber, the combustion chamber and the residue chamber are separated by a filter plate with evenly distributed through holes, and the residue chamber is arranged below the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A front perspective view of the burner capable of preventing hopper combustion according to the utility model is shown.

[0022] Figure 2 A top view of the burner capable of preventing hopper combustion according to the utility model is shown.

[0023] Figure 3A front sectional view of the burner capable of preventing hopper combustion according to the utility model is shown.

[0024] Figure 4 A side sectional view of the regulating valve of the burner capable of preventing hopper combustion according to the utility model is shown. DETAILED DESCRIPTION

[0025] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0026] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0027] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0028] refer to Figures 1 to 4 According to a preferred embodiment of the utility model, a burner capable of preventing hopper combustion is used to preheat the biomass fuel before combustion to reduce the flame temperature of igniting the fuel, and then burn the preheated fuel.

[0029] The burner capable of preventing hopper combustion comprises a hopper 10, a conveying device 20 and a preheating device 30. The fuel in the hopper 10 is conveyed to the preheating device 30 by the conveying device 20, and the preheating device 30 is used to preheat the fuel to increase the temperature of the fuel, thereby reducing the flame temperature for igniting the fuel.

[0030] Specifically, the hopper 10 forms a high end and a low end, wherein the hopper 10 forms a feed port 101 at the high end, and a feed port 102 at the low end, and the hopper 10 forms a hopper cavity 103 between the feed port 101 and the feed port 102, so that the fuel put into the hopper cavity 103 from the feed port 101 at the high end falls to the feed port 102 at the low end under the action of gravity. The fuel falling to the feed port 102 is further conveyed by the conveying device 20 to the preheating device 30 for preheating.

[0031] The conveying device 20 includes a conveying pipe 21 and a conveying assembly 22. The conveying assembly 22 is installed on the conveying pipe 21 to convey the fuel.

[0032] The conveying pipe 21 forms a feed port 2101 and a discharge port 2102, the feed port 2101 is connected to the discharge port 2102, and the feed port 2101 is connected to the discharge port 102 of the hopper 10. The conveying pipe 21 also forms a conveying cavity 2103 between the feed port 2101 and the discharge port 2102. The fuel enters the conveying cavity 2103 from the feed port 2101, and the fuel in the conveying cavity 2103 is conveyed by the conveying assembly 22 toward the discharge port 2102.

[0033] In this embodiment, the conveying assembly 22 is implemented as a spiral conveying mechanism. The conveying assembly 22 includes a conveying member 221 and a rotating rod 222. The conveying member 221 is implemented as a spiral blade, and the conveying member 221 is fixedly mounted on the rotating rod 222. The rotating rod 222 is driven and installed in the conveying chamber 2103 between the feed port 2101 and the discharge port 2102 to rotate along its own axis. The rotating rod 222 rotates, thereby driving the conveying member 221 to rotate along the axis of the rotating rod 222. Under the interaction of the centrifugal force generated by the rotation of the conveying member 221 and the self-weight of the fuel, the fuel is conveyed from the feed port 2101 to the discharge port 2102.

[0034] The conveying device 20 further includes a conveying driving member 23 , which is implemented as a motor to drive the rotating rod 222 to rotate along its own axis.

[0035] The preheating device 30 is installed on the outer wall of the conveying pipe 21 of the conveying device 20, and the preheating device 30 is installed near the discharge port 2102 of the conveying pipe 21, so that the fuel in the conveying chamber 2103 is preheated by the preheating device 30 and then continues to be conveyed to the discharge port 2102 by the conveying component 22.

[0036] The preheating device 30 includes an air collecting pipe 31, a plurality of air injection members 32 and an air guide member 33. The air collecting pipe 31 is fixedly installed near the conveying pipe 21. The air guide member 33 is arranged to contact the outer wall of the conveying pipe 21, and the air guide member 33 and the conveying pipe 21 are implemented as heat-conducting metal materials. The air guide member 33 includes a heat-conducting wall 331, and the heat-conducting wall 331 contacts the outer wall of the conveying pipe 21.

[0037] The air collecting pipe 31 forms a first air inlet 3101 and an air collecting cavity 3102, and the first air inlet 3101 is connected to the air collecting cavity 3102. The jet component 32 is implemented as a pipe with two ports connected, and the jet component 32 forms a second air inlet 3201 and an air jet 3202, and the second air inlet 3201 is connected to the air jet 3202. The second air inlet 3201 is connected to the air collecting cavity 3102 of the air collecting pipe 31. The air guide 33 forms a wind cavity 3301, and the air jet 3202 of the jet component 32 is connected to the wind cavity 3301.

[0038] It should be noted that the diameter of the jet port 3202 of the jet component 32 connected to the air guide cavity 3301 is much smaller than the diameter of the second air inlet 3201 of the jet component 32 connected to the gas collecting cavity 3102. In this way, the high-pressure gas ejected from the jet port 3202 has a higher gas pressure and a higher temperature.

[0039] The high-pressure gas enters the gas collecting cavity 3102 through the first air inlet 3101 of the gas collecting pipe 31, further passes through the second air inlet 3201 of the jet member 32 connected to the gas collecting cavity 3102, and then is ejected from the jet port 3202 connected to the second air inlet 3201. The high-pressure gas ejected from the plurality of jet ports 3202 forms an air curtain and is ejected into the wind cavity 3301 of the wind guide member 33 connected to the jet port 3202. At this time, the temperature of the wind cavity 3301 and the heat-conducting wall 331 rises, thereby increasing the temperature of the fuel in contact with the heat-conducting wall 331, so as to achieve the effect of preheating the fuel. In this way, the temperature of the fuel is increased before combustion, so that the ignition temperature at which the fuel can be ignited is reduced, and the fuel that has not been preheated will not be ignited, thereby preventing the flame from igniting the unpreheated fuel in the hopper cavity 103 of the hopper 10, thereby reducing the fire risk of the hopper 10.

[0040] In addition, the fuel is a biomass fuel with high volatility. That is to say, at a certain temperature, the fuel is isolated from air and heated, and more combustible gas is generated after the fuel is thermally decomposed. However, the heat-conducting wall 331 of the air guide 33 is not connected to the wind cavity 3301. In this way, after the fuel is heated by the heat-conducting wall 331, a large amount of combustible gas generated by thermal decomposition will not escape, but continue to be ignited together with the fuel, so that the fuel can be fully burned.

[0041] Preferably, the jet port 3202 of the jet member 32 is arranged to be inclined at a predetermined angle, so as to improve the uniformity of the high-pressure gas ejected from the jet port 3202 .

[0042] The air guide 33 is further formed with a plurality of exhaust holes 3303 at a position adjacent to the heat-conducting wall 331 , so that the high-pressure gas sprayed into the air cavity 3301 from the air injection port 3202 can be discharged from the exhaust holes 3303 .

[0043] Furthermore, the burner capable of preventing hopper combustion further comprises a burner 40, wherein the burner 40 forms a high end portion and a low end portion. The high end portion of the burner 40 is disposed close to the discharge port 2102 of the conveying pipe 21. The burner 40 forms a combustion chamber 401, wherein the fuel is conveyed to the discharge port 2102 via the conveying assembly 22, and then falls into the combustion chamber 401 under the action of the fuel's own gravity for combustion.

[0044] After the fuel is burned in the burner 40, solid residue and gaseous waste smoke will be generated. Further, the burner capable of preventing hopper combustion further comprises a discharge device 50, and the discharge device 50 is arranged close to the burner 40. The discharge device 50 comprises a smoke exhaust member 51, and the smoke exhaust member 51 is implemented as a pipe member with two ends connected. The smoke exhaust member 51 forms a smoke exhaust port 5101 and a smoke exhaust cavity 5102, and the smoke exhaust port 5101 is connected to the smoke exhaust cavity 5102. The smoke exhaust member 51 is arranged at an end away from the smoke exhaust port 5101 to be connected to the combustion cavity 401 of the burner 40. The waste smoke generated after the fuel is burned in the burner 40 enters the smoke exhaust cavity 5102 and is discharged into the atmosphere through the smoke exhaust port 5101.

[0045] It is worth mentioning that the preheating device 30 further includes a regulating valve 34 and a heat conducting member 35. The regulating valve 34 is installed on the air collecting pipe 31 to control the air flow of the high-pressure air entering the air collecting cavity 3102 of the air collecting pipe 31. The heat conducting member 35 is implemented as a copper tube, and the heat conducting member 35 is wound and installed on the smoke exhaust member 51, and is in contact with the side wall of the smoke exhaust member 51.

[0046] The regulating valve 34 forms a third air inlet 3401 and a first air outlet 3402, and the third air inlet 3401 and the first air outlet 3402. The third air inlet 3401 is arranged to be connected to the air collecting cavity 3102 of the air collecting pipe 31. The heat conducting member 35 forms a fourth air inlet 3501 and a second air outlet 3502, and the fourth air inlet 3501 and the second air outlet 3502 are connected. The second air outlet 3502 is connected to the third air inlet 3401 of the regulating valve 34, and the fourth air inlet 3501 is connected to the atmosphere.

[0047] It is understandable that the waste smoke generated after the fuel in the burner 40 is burned enters the smoke exhaust chamber 5102, and generates a large amount of heat in the smoke exhaust chamber 5102, so that the temperature of the smoke exhaust member 51 increases. According to the principle of heat conduction, the heat in the smoke exhaust chamber 5102 is conducted to the heat conductive member 35 wound and installed with the smoke exhaust member 51, so that the temperature of the heat conductive member 35 increases. In this way, after the air enters the fourth air inlet 3501 of the heat conductive member 35, it is heated by the heat conductive member 35 and then discharged through the second air outlet 3502. It further passes through the regulating valve 34 and enters the air collecting pipe 31, thereby realizing the reuse of the fuel.

[0048] The preheating device 30 further includes a fixing member 36, and the gas collecting pipe 31 is detachably mounted on the fixing member 36 so as to fix the preheating device 30 on the burner capable of preventing hopper combustion.

[0049] The burner 40 further includes a nozzle 41 , which is connected to the combustion chamber 401 . The high-temperature combustion gas containing hydrogen, methane, carbon monoxide, etc. generated by the cracking of the fuel under high temperature conditions is discharged through the nozzle 41 .

[0050] Furthermore, the discharge device 50 further includes a residue piece 52, the residue piece 52 forms a residue chamber 5201 and a residue removal port 5202, and the residue removal port 5202 is connected to the residue chamber 5201. The user can remove the ash and residue in the residue chamber 5201 through the residue removal port 5202. The residue chamber 5201 is connected to the combustion chamber 401, and the combustion chamber 401 and the residue chamber 5201 are separated by a filter plate with evenly distributed through holes, and the residue chamber 5201 is arranged below the combustion chamber 401, so that the ash and residue formed after the fuel is burned in the combustion chamber 401 fall into the residue chamber 5201 through the filter plate under the action of gravity for collection.

[0051] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A burner capable of preventing hopper combustion, characterized in that: The burner capable of preventing hopper combustion includes a preheating device for preheating fuel to increase the temperature of the fuel, and the preheating device includes: An air collecting pipe, wherein the air collecting pipe forms a first air inlet and an air collecting cavity, and the first air inlet and the air collecting cavity are connected; An injection member, wherein the injection member is implemented as a pipe member with two connected ports, the injection member forms a second air inlet and an injection port, the second air inlet is connected to the injection port, the second air inlet is connected to the air collecting cavity of the air collecting pipe, and the diameter of the injection port is much smaller than the diameter of the second air inlet; An air guide member, wherein the air guide member includes a heat-conducting wall, the air guide member forms an air cavity, the jet port of the jet member is connected to the air cavity, the high-pressure gas enters the air collecting cavity through the first air inlet of the air collecting pipe, further passes through the second air inlet and is ejected from the jet port, the high-pressure gas ejected from the multiple jet ports forms an air curtain, and the air curtain is ejected into the air cavity.

2. The burner capable of preventing hopper combustion according to claim 1, characterized in that: The burner capable of preventing hopper combustion also includes: A hopper, wherein the hopper forms a high end portion and a low end portion, wherein the hopper forms an upper material opening at the high end portion, and wherein the hopper forms a lower material opening at the low end portion, and wherein the hopper forms a hopper cavity between the upper material opening and the lower material opening; A conveying device, the conveying device comprises a conveying pipe and a conveying assembly, the conveying assembly is installed on the conveying pipe, the outer wall of the conveying pipe is in contact with the heat-conducting wall, the conveying pipe forms a feed port and a discharge port, the feed port is connected with the discharge port, the feed port is connected with the discharge port of the hopper, the conveying pipe also forms a conveying cavity between the feed port and the discharge port, the fuel enters the conveying cavity from the feed port, the fuel in the conveying cavity is conveyed by the conveying assembly toward the discharge port, the preheating device is installed on the outer wall of the conveying pipe, and the preheating device is installed near the discharge port; A burner, wherein the burner forms a high end portion and a low end portion, wherein the high end portion of the burner is disposed close to the discharge port of the conveying pipe, and wherein the burner forms a combustion chamber, wherein the fuel is conveyed to the discharge port via the conveying assembly, and then falls into the combustion chamber under the action of the fuel's own gravity for combustion; A discharge device is arranged close to the burner, and the discharge device includes a smoke exhaust piece, and the smoke exhaust piece is implemented as a pipe with two ends connected, and the smoke exhaust piece forms a smoke exhaust port and a smoke exhaust cavity, and the smoke exhaust port and the smoke exhaust cavity are connected. The smoke exhaust piece is arranged to be connected to the combustion cavity of the burner at one end away from the smoke exhaust port, and the waste smoke generated after the fuel is burned in the burner enters the smoke exhaust cavity and is discharged into the atmosphere through the smoke exhaust port.

3. The burner capable of preventing hopper combustion according to claim 2, characterized in that: The conveying assembly includes a conveying member and a rotating rod. The conveying member is implemented as a spiral blade. The conveying member is fixedly installed on the rotating rod. The rotating rod is driven and installed in the conveying chamber so as to rotate along its own axis. The rotating rod rotates, thereby driving the conveying member to rotate along the axial direction of the rotating rod.

4. The burner capable of preventing hopper combustion according to claim 3, characterized in that: The conveying device further comprises a conveying driving member, which is implemented as a motor to drive the rotating rod to rotate along its own axial direction.

5. The burner capable of preventing hopper combustion according to claim 1, characterized in that: The air guide member is further formed with a plurality of exhaust holes at a position adjacent to the heat-conducting wall, so that the high-pressure gas sprayed into the air cavity from the air injection port can be discharged from the exhaust holes.

6. The burner capable of preventing hopper combustion according to at least one of claims 2, characterized in that: The preheating device also includes a regulating valve and a heat conductor. The regulating valve is installed on the air collecting pipe to control the airflow size of the high-pressure air entering the air collecting cavity of the air collecting pipe. The heat conductor is implemented as a copper tube. The heat conductor is wound and installed on the smoke exhaust component and fits with the side wall of the smoke exhaust component.

7. The burner capable of preventing hopper combustion according to claim 6, characterized in that: The regulating valve forms a third air inlet and a first air outlet, and the third air inlet is arranged to be connected to the air collecting cavity of the air collecting pipe; the heat conducting component forms a fourth air inlet and a second air outlet, and the fourth air inlet is connected to the second air outlet, and the second air outlet is connected to the third air inlet of the regulating valve, and the fourth air inlet is connected to the atmosphere.

8. The burner capable of preventing hopper combustion according to claim 6, characterized in that: The preheating device further comprises a fixing member, and the air collecting pipe is detachably mounted on the fixing member.

9. The burner capable of preventing hopper combustion according to claim 8, characterized in that: The burner also includes a nozzle, which is in communication with the combustion chamber, and through which high-temperature combustion gas generated by cracking of the fuel under high-temperature conditions is discharged.

10. The burner capable of preventing hopper combustion according to claim 9, characterized in that: The discharge device also includes a residue piece, which forms a residue cavity and a residue cleaning port, the residue cleaning port is connected to the residue cavity, the residue cavity is connected to the combustion cavity, the combustion cavity and the residue cavity are separated by a filter plate with evenly distributed through holes, and the residue cavity is arranged below the combustion cavity.

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