Solid fuel gasification furnace

Abstract

The invention discloses a solid fuel gasification furnace, and aims to solve the problem that in the prior art, volatile substances generated by heating solid fuel are insufficiently combusted at the bottom of a pot, and'black pot 'is easily generated. The technical problem is solved through the following technical scheme: a hearth is arranged in a furnace body; the furnace ring assembly is arranged at the top of the hearth; the furnace ring assembly comprises an infrared generation ring, a preheating air cavity and a heat preservation and insulation layer. The preheating air cavity is arranged on the outer side of the infrared generation ring. The heat preservation and insulation layer is arranged on the outer side of the preheating air cavity. A preheating air channel is arranged in the furnace body, the preheating air cavity is communicated with the outer side of the furnace body through the preheating air channel, and a plurality of preheating air outlets are formed in the side wall of the infrared generation ring in a penetrating mode. Air enters the furnace body from the preheating air channel, enters the preheating air cavity after being heated in the furnace body, and finally enters the inner side of the infrared generation ring from the preheating air outlet to participate in secondary combustion.

Description

Technical Field

[0001] The present invention relates to the technical field of stoves, and more particularly to a solid fuel gasification stove. Background Art

[0002] Solid combustion gasifiers are heating or cooking equipment that provide heat energy by burning solid fuels such as firewood, biomass pellets, and charcoal. They are common daily appliances in people's lives, especially in the wild or in rural areas. The combustion process of solid fuels is mainly divided into the following stages: (1) Heating stage: solid fuels lose moisture and become dry during the heating process; (2) Ignition stage: solid fuels generate volatile substances, which begin to burn after reaching the ignition point, forming flames and releasing heat; (3) Combustion or deflagration stage: solid fuels burn rapidly and fully, releasing a large amount of heat. This process requires a large amount of oxygen; (4) Burnout stage: the residue after the solid fuel is burned is a small amount of ash, indicating that the wood has been burned out.

[0003] Solid fuel gasifiers in the prior art have been improving towards smokeless, mainly by increasing the oxygen supply in the combustion chamber, thereby improving the combustion efficiency of the fuel in the combustion chamber to achieve a smokeless effect (providing sufficient oxygen for the third stage of combustion). However, when cooking food, the temperature of the pot itself is reduced by the heat absorption of the food, which easily reduces the temperature of the flame, causing the volatile substances generated by the solid fuel to not burn completely, and then causing the precipitation of black carbon on the bottom surface of the pot, commonly known as a black pot. At the same time, the lower part of the flame is exposed to the air, causing a large amount of heat energy to diffuse into the surrounding air, reducing the thermal efficiency. Summary of the invention

[0004] The present invention overcomes the two deficiencies of the solid fuel gasification furnace in the prior art: (1) the volatile substances generated by heating the solid fuel are not fully burned at the bottom of the pot, which easily produces a "black pot"; (2) the flame is exposed to the air at the same time, and the heat utilization rate is low. A solid fuel gasification furnace is provided, which can perform secondary combustion on the volatile substances at the bottom of the pot, so that the solid fuel burns more fully and the formation of a black pot can be prevented; at the same time, it can reduce the heat diffused to the surrounding air and improve the heat utilization rate.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a solid fuel gasification furnace, comprising: A furnace chamber disposed within the furnace body; The furnace ring assembly is arranged on the top of the furnace; the furnace ring assembly includes an infrared generating ring and a preheating air cavity, and the preheating air cavity is arranged outside the infrared generating ring; A preheating air duct is arranged in the furnace body, and the preheating air cavity is connected with the outside of the furnace body through the preheating air duct. A plurality of preheating air outlets are arranged through the side wall of the infrared generating circle. The air enters the furnace body from the preheating air duct, and after being heated in the furnace body, it enters the preheating air cavity, and finally enters the inner side of the infrared generating circle from the preheating air outlet to participate in secondary combustion.

[0006] In the present invention, after ignition, the solid fuel is placed in the gasification chamber, the hot air of the combustion flows upward, and the suction air enters the gasification chamber from the gasification damper. At this time, the temperature of the gasification chamber rises rapidly, heating the inner wall of the gasification chamber, and further the combustion-supporting air entering from the gasification gas duct. After gradually heating up, the gasification chamber reaches the gasification condition, and the generated flame and the combustible volatile substance mixture are ignited by the high-temperature air when passing through the combustion air outlet of the combustion chamber (primary combustion). The flame generated by the primary combustion flows along the bottom of the pot, and at the same time heats the infrared generating circle, so that the air temperature in the preheating air cavity increases. The air heated in the preheating air cavity is ejected from the preheating air outlet, reacts with the incompletely burned volatile substances in the primary combustion flame, and performs secondary combustion. The high temperature generated by the secondary combustion is dispersed along the bottom of the pot, and the high temperature generated by the chemical reaction of the secondary combustion directly forms more thermal convection impact on the bottom of the pot, so that the secondary combustion material is completely burned under the impact of the high-temperature air, achieving flameless combustion. The uniform and intense combustion releases higher energy and emits infrared rays. The hot air ejected from the preheating air outlet and the high-speed combustion reaction of the combustible volatile substance mixture trigger thermal convection, and the infrared radiation generated by the infrared generating circle improves the thermal efficiency. In this high-temperature infrared radiation environment, the volatile substances that are not completely burned out are fully burned, allowing the volatile substances cooled by the bottom of the pot to reignite. In the high-temperature air combustion-supporting environment heated in the preheating air cavity, the volatile substances are completely burned, so that the black pot phenomenon will not occur.

[0007] Preferably, the furnace comprises a gasification chamber and a combustion chamber arranged above the gasification chamber; The outer wall of the gasification chamber is provided with a gasification gas channel, and the side wall of the gasification chamber is penetrated with a plurality of gasification air outlets; one end of the gasification gas channel is connected to the outside air of the furnace body, and the other end is connected to the gasification air outlet; The outer wall of the combustion chamber is provided with a combustion air passage, and the side wall of the combustion chamber is penetrated with a plurality of combustion air outlets; one end of the combustion air passage is connected with the outside air of the furnace body, and the other end is connected with the combustion air outlet.

[0008] Preferably, the preheating gas duct, the combustion gas duct and the gasification gas duct are all arranged on the periphery of the gasification chamber, and the preheating gas duct, the combustion gas duct and the gasification gas duct are arranged in layers from the outside to the inside.

[0009] The gasification gas duct is arranged outside the gasification chamber, followed by the gasification gas duct and the preheating gas duct. The heat generated in the gasification chamber can first heat up the gasification gas duct, thereby increasing the rate at which the solid fuel in the gasification chamber dries and loses moisture, so that the solid fuel can dry as quickly as possible to produce combustible volatile substances. The combustion gas duct is arranged outside the gasification gas duct, so that the waste heat outside the gasification gas duct can heat up the combustion gas duct, so that after the air enters the combustion chamber from the combustion gas duct, and the length of the combustion gas duct is longer than that of the gasification gas duct, the air already has a certain temperature, so that it can better participate in the combustion in the combustion chamber.

[0010] Preferably, a plurality of gasification partitions distributed along the axial direction of the gasification chamber are provided on the outer side wall of the gasification chamber, and the plurality of gasification partitions divide the gasification gas channel into a plurality of gasification partitions; one end of each gasification partition is connected to the gasification gas channel, and the other end is connected to the gasification air outlet.

[0011] The gasification partition can separate the air in the gasification channel, so that the air can flow in an orderly manner outside the gasification chamber, and the air can stably enter the gasification chamber through the gasification partition, so that the solid fuel gasification process inside the gasification chamber can be more stable. At the same time, even if there is wind from the outside blowing into the gasification channel, the gasification partition can also divert the wind from the outside, thereby reducing the impact of the outside wind on the combustion in the gasification chamber.

[0012] Preferably, an air duct partition is provided on the outer side of the furnace, and the air duct partition and the furnace cooperate to form a collective inner channel, the gasification gas channel and the combustion gas channel are both arranged in the collective inner channel, and the collective inner channel is connected with the air preheating chamber; a collective outer channel is provided on the outer side of the air duct partition, and the collective outer channel is connected with the outer side of the furnace body, and a number of partition perforations connecting the collective outer channel and the collective inner channel are provided on the air duct partition.

[0013] A summary inner channel is set between the air channel partition and the furnace, and the gasification gas channel and the combustion gas channel are combined and set in the summary inner channel, making the internal structure of the furnace body simpler. At the same time, once the air enters the summary inner channel, it begins to absorb heat, and then enters the summary inner channel, so that the air can be immediately preheated. When the air enters the gasification chamber downward from the summary inner channel, the gasification chamber airflow rushes down, which can better complete the gasification reaction; and when the air enters the preheating air cavity upward from the summary inner channel, it can also be well preheated, so that after pouring to the preheating air outlet, it can be burned for the second time and generate infrared radiation.

[0014] Preferably, a plurality of outer channel partitions surrounding the outer side of the furnace are arranged on the inner side of the aggregated outer channel, and the plurality of outer channel partitions divide the aggregated outer channel into layered outer channels, and adjacent layered outer channels are connected to form a curved outer channel.

[0015] The curved outer channel can extend the path of air flow, so that the heat outside the gasification chamber can be fully vaporized, the utilization rate of heat is improved, and the temperature of the furnace surface is reduced.

[0016] Preferably, a collecting outer channel is arranged on the outer side of the air channel partition, a main air inlet is arranged at the bottom of the collecting outer channel, and an air intake fan is arranged at the main air inlet.

[0017] The air intake fan can blow air into the outer channel, thereby improving the air intake efficiency of the outer channel, so that the fuel can obtain more air, thereby improving the combustion efficiency of the fuel. When the fuel burns normally, a siphon effect can be generated in the curved outer channel, which means that the air intake fan will not consume more electricity due to the setting of the outer channel partition.

[0018] Preferably, a return air cavity is provided on the outer side of the preheating air cavity, and the return air cavity is in close contact with the preheating air cavity; a return air port is provided on the top of the furnace ring assembly, and the smoke enters the return air cavity through the return air port and is discharged outside the furnace body.

[0019] When the pot is placed on the pot bottom bracket, the smoke enters the chimney from the return air cavity. The high-temperature smoke passing through the return air cavity impacts the outer wall of the preheating air cavity, thereby heating the air in the preheating air cavity, realizing the secondary utilization of the smoke heat and reducing the waste of smoke heat.

[0020] Preferably, a plurality of dividing blocks are arranged in the preheating air cavity along the axial direction thereof, wherein the dividing blocks are spiral-shaped and the spiral-shaped dividing blocks divide the preheating air cavity into a plurality of spiral preheating air cavities.

[0021] The spiral partition divides the air preheating chamber into several preheating chambers, so that the air entering the preheating chamber is forced to flow along a curved path, thereby increasing the flow path of the preheating air, making the path of the preheating air longer and the flow time longer, so that the preheating air can have a more sufficient heat exchange in the preheating chamber, making the preheated air temperature higher. After reaching the preheating air outlet, it is ejected tangentially, forming a certain swirl effect.

[0022] In addition, adjacent preheating chambers are isolated from each other, and the flow of air in each preheating chamber will not be affected by other preheating chambers, so that the air flows more stably in each preheating chamber, and the preheating air flowing out of the preheating air outlet is also more stable, which makes the secondary combustion of the gas more stable, thereby improving the efficiency of the secondary combustion of the gas.

[0023] Preferably, a grate is provided at the bottom of the furnace, and a dust collector is provided at the bottom of the grate.

[0024] The grate is provided with perforations, and the remaining ash after the solid fuel is burned can fall into the dust collector through the perforations on the grate.

[0025] Compared with the prior art, the present invention has the following beneficial effects: (1) Solid fuel is ignited in the furnace, and the pot is placed on the pot bottom support. The solid fuel is gasified during the heating process to produce combustible volatile substances, which then come into contact with air for primary combustion. The flame generated by the primary combustion encounters the bottom of the pot, flows along the bottom of the pot, and heats the infrared generator, causing the air temperature in the preheating air cavity to rise. The heated air in the preheating air cavity is ejected from the preheating air outlet, reacts with the incompletely burned volatile substances in the primary flame, and undergoes secondary combustion. The high temperature generated by the secondary combustion is dispersed along the bottom of the pot. The high temperature generated by the chemical reaction of the secondary combustion directly forms a large amount of thermal convection impact on the bottom of the pot, so that the secondary combustion products are completely burned under the impact of the high-temperature air, achieving smokeless combustion. The uniform and intense combustion releases higher energy and emits infrared rays. The hot air ejected from the preheating air outlet and the combustion reaction of the high-speed volatile substances induce thermal convection, which, in conjunction with the infrared radiation generated by the infrared generator, improves the thermal efficiency. In this high-temperature infrared radiation environment, the volatile substances that are not completely burned out are fully burned, allowing the volatile substances that are cooled by the bottom of the pot to reignite. In the high-temperature air combustion environment heated in the preheated air cavity, the volatile substances are completely burned, so there will be no black pot phenomenon; (2) When using firewood fuel outdoors, due to the need for portability, there is no chimney or firewood adding port. When using, you need to remove the pot and add firewood from the top. Because the gasification air outlet of the gasification chamber is widely distributed, the oxygen supply is controllable, and the combustion is sufficient and orderly, firewood can be added continuously from the top, and the ashes after burning are discharged from the lower grate. Because the solid fuel and flame are wrapped and insulated by the furnace body, the heat waste is limited, the air preheating effect of the gasification chamber is good, and the amount and frequency of adding firewood are not high. After testing, adding fuel once about ten minutes after full startup can achieve continuous and stable combustion. Sufficient preheating and widely distributed gasification air outlets make the stove not picky about firewood. Firewood obtained outdoors is exposed to the natural environment and is usually high in humidity. After entering the gasification chamber, the moisture contained in it encounters a high-temperature carbon particle environment and undergoes a reduction reaction to generate carbon monoxide and hydrogen, which is more conducive to the subsequent combustion reaction. In actual use, firewood with high humidity is used. The flame burning at the combustion chamber outlet is transparent or blue-green with some orange, and the odor is very small or no odor. Within half an hour without adding firewood, since the embers in the gasification chamber are still there, adding firewood again can quickly restart, which has good practicality.

[0026] (3) When the pot is placed on the pot bottom support, the smoke enters the chimney from the return air cavity. The high-temperature smoke in the return air cavity impacts the outer wall of the preheating air cavity, thereby heating the air in the preheating air cavity, realizing the secondary utilization of the smoke heat and reducing the waste of smoke heat. After the chimney is started, the fire viewing cover is opened. Due to the suction negative pressure of the chimney, the flame gas will not be ejected from the charging tube. After the pot is removed, the flame gas is directly discharged from the top of the furnace, so it will not be ejected from the charging tube. The addition of the charging tube allows fuel to be added and the combustion inside the furnace to be observed without removing the pot, avoiding the frequent removal of the pot to cause the heat diffusion of the infrared generating circle, affecting the air preheating and secondary combustion reaction in the preheating air cavity, which is beneficial to the cooking of the food in the pot. At the same time, the post-combustion gas can be discharged to other spaces, away from the cooking personnel, and can also be suitable for indoor use. In actual use, due to complete digestion and sufficient heat absorption, the discharged smoke is colorless. When the temperature is low in winter, the water vapor contained in the discharged smoke will condense and precipitate white mist. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention.

[0028] Figure 2 yes Figure 1 A magnified view of the structure in area A.

[0029] Figure 3 yes Figure 1 A magnified view of the structure in region B.

[0030] Figure 4 It is a schematic diagram of the structure in Example 3 of the present invention.

[0031] Figure 5 It is a schematic diagram of the structure when a chimney is provided in Example 3 of the present invention.

[0032] Figure 6 It is a schematic diagram of the structure of the feeding cylinder provided in the embodiment 3 of the present invention.

[0033] Figure 7 It is a schematic diagram of the structure in Example 4 of the present invention.

[0034] Figure 8 It is a schematic diagram of the structure related to the outer channel partition of the present invention.

[0035] Fig. 9 It is a structural schematic diagram of the split block of the present invention.

[0036] Fig.10 It is a cross-sectional view in Example 8 of the present invention.

[0037] Fig.11 yes Fig.10 A partial enlarged view of the .

[0038] Fig.12 It is a cross-sectional view in Example 9 of the present invention.

[0039] Fig.13 It is a cross-sectional view in Example 10 of the present invention.

[0040] Fig.14 It is a cross-sectional view in Example 11 of the present invention.

[0041] In the figure: 1, furnace body, 11, pot; 2. furnace, 21. gasification chamber, 211. gasification gas channel, 212. gasification air outlet, 213. gasification damper, 214. gasification baffle, 215. gasification baffle, 216. gasification frame, 217. gasification hood, 22. combustion chamber, 221. combustion gas channel, 222. combustion air outlet, 223. combustion damper, 23. grate, 24. drawer, 25. refractory layer, 251. tubular gas nozzle, 26. preheating ring cavity; 3. furnace ring assembly, 31. infrared generating ring, 311. preheating air outlet, 312. reflux ring groove, 32. preheating air cavity, 33. thermal insulation layer, 34. preheating air duct, 341. preheating air door, 35. pot bottom bracket; 41. air inlet, 42. adjusting ring, 421. adjusting hole, 43. adjusting rod; 5. Return air cavity, 51. Return air port, 52. Chimney, 53. Feeding tube, 54. Fire viewing cover; 6. airway baffle, 61. summary inner channel, 62. summary outer channel, 621. total air inlet, 63. baffle perforation, 64. outer channel baffle, 641. first baffle, 642. second baffle, 643. top baffle, 65. layered outer channel, 651. first outer channel, 652. second outer channel, 653. top outer channel, 654. diversion opening, 655. self-priming damper, 66. air intake fan; 7. Vent nozzle; 8. Split gear; 9. Moving wheels. DETAILED DESCRIPTION

[0042] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: Reference Figure 1 As shown, a solid fuel gasifier comprises: A furnace body 1, wherein a furnace chamber 2 is arranged in the furnace body 1; The furnace ring assembly 3 is arranged on the top of the furnace 2; the furnace ring assembly 3 includes an infrared generating ring 31, a preheating air cavity 32 and a heat preservation and heat insulation layer 33, the preheating air cavity 32 is arranged on the outside of the infrared generating ring 31; the heat preservation and heat insulation layer 33 is arranged on the outside of the preheating air cavity 32; A preheating air passage 34 is provided in the furnace body 1, and the preheating air cavity 32 is connected with the outside of the furnace body 1 through the preheating air passage 34. A plurality of preheating air outlets 311 are provided through the side wall of the infrared generating circle 31. The air enters the furnace body 1 from the preheating air passage 34 , and after being heated in the furnace body 1 , the air enters the preheating air cavity 32 , and finally enters the inner side of the infrared generating circle 31 from the preheating air outlet 311 to participate in the secondary combustion.

[0043] The shape of the infrared generating circle 31 matches the shape of the pot bottom. The infrared generating circle 31 is an annular structure. The annular structure includes a strictly circular ring structure, and also includes a triangular ring or a polygonal ring surrounded by three sides, four sides or more. The infrared generating circle 31 in this embodiment is an annular structure, and the infrared generating circle 31 is a trumpet-shaped with a gradually increasing opening. A plurality of pot bottom brackets 35 are arranged along the circumferential direction at the upper end of the infrared generating circle 31. The pot bottom brackets 35 can be annular or can be a protruding block arranged on the surface of the infrared generating circle 31.

[0044] When in use, the pot is mounted on the pot bottom support 35, the pot is mounted above the infrared generating circle 31, the infrared generating circle 31 surrounds the bottom of the pot, and the gap between the infrared generating circle 31 and the pot bottom reserves a channel for the flame generated by the primary combustion, providing a place for infrared generation. When solid fuel (such as firewood) burns in the furnace 2, the flame moves upward, flows along the bottom of the pot after encountering it, heats the infrared generating circle 31, and then heats the air in the preheating air cavity 32.

[0045] The side of the infrared generating circle 31 close to the bottom of the pot is the infrared generating area. The preheating air cavity 32 is a hollow structure, and the preheating air duct 34 is connected to the bottom of the preheating air cavity 32. The end of the preheating air duct 34 away from the preheating air cavity 32 is arranged at the bottom of the furnace body 1 and corresponds to the position of the furnace 2, so that when the air passes through the preheating air duct 34, it can flow upward along the outside of the furnace 2, so that there is a longer time to use the heat of the furnace 2 to heat the air, thereby improving the utilization rate of the waste heat energy of the furnace 2.

[0046] The actual use process of the present invention is as follows: solid fuel is ignited in the furnace 2, and the pot is mounted on the pot bottom support 35. The solid fuel is gasified in the process of heating to produce combustible volatile substances, and then contacts with air for primary combustion. The flame generated by the primary combustion encounters the bottom of the pot, and the primary flame flows along the bottom of the pot, while heating the infrared generating circle 31, so that the air temperature in the preheating air cavity 32 increases. The air heated in the preheating air cavity 32 is ejected from the preheating air outlet 311, reacts with the incompletely burned volatile substances in the primary flame, and performs secondary combustion. The high temperature generated by the secondary combustion is dispersed along the bottom of the pot. The high temperature generated by the chemical reaction of the secondary combustion directly forms more thermal convection impact on the bottom of the pot, so that the secondary combustion products are completely burned under the impact of high-temperature air, and flameless combustion is achieved. Uniform and intense combustion releases higher energy and emits infrared rays. The hot air ejected from the preheating air outlet 311 and the combustion reaction of the high-speed volatile substances induce thermal convection, and the infrared radiation generated by the infrared generating circle 31 improves the thermal efficiency. In this high temperature infrared radiation environment, the volatile substances that are not completely burned out are fully burned, so that the volatile substances cooled by the bottom of the pot are re-ignited. In the high temperature air combustion environment heated in the preheating air cavity 32, the volatile substances are completely burned, so that the black pot phenomenon will not occur.

[0047] Example 2: Reference Figure 1 and Figure 2 As shown, a solid fuel gasification furnace comprises: a furnace body 1, a support leg is arranged at the bottom of the furnace body 1, a furnace chamber 2 is arranged in the furnace body 1, and a furnace ring assembly 3 is arranged at the top of the furnace chamber 2.

[0048] The furnace ring assembly 3 includes an infrared generating ring 31, a preheating air cavity 32 and a heat preservation and heat insulation layer 33. The preheating air cavity 32 is arranged outside the infrared generating ring 31; the heat preservation and heat insulation layer 33 is arranged outside the preheating air cavity 32. It should be noted that the heat preservation and heat insulation layer 33 includes all relevant components arranged outside the preheating air cavity 32, for example, it can also be the outer shell of the preheating air cavity 32, but the heat preservation effect of the outer shell is poor. Therefore, in actual production, the heat preservation effect can be improved by increasing the thickness of the outer shell of the preheating air cavity 32. In this embodiment, a layer of heat preservation material is separately filled in the outer shell of the preheating air cavity 32 to improve the heat preservation and heat insulation effect.

[0049] A preheating air duct 34 is provided in the furnace body 1, and the preheating air cavity 32 is connected to the outside of the furnace body 1 through the preheating air duct 34. A plurality of preheating air outlets 311 are provided through the side wall of the infrared generating circle 31. A preheating air door 341 is provided at the other end of the preheating air duct 34 away from the preheating air cavity 32. The preheating air door 341 can adjust the opening size of the preheating air duct 34, so as to control the amount of air entering the preheating air duct 34.

[0050] The air enters the furnace body 1 from the preheating air duct 34 . When passing through the preheating air duct 34 , the air is heated in the furnace body 1 and then enters the preheating air cavity 32 . Finally, the air enters the inner side of the infrared generating circle 31 from the preheating air outlet 311 to participate in the secondary combustion.

[0051] In this embodiment, the gaps between the outer shell of the furnace body 1 and the furnace ring assembly 3 and the furnace chamber 2 are filled with thermal insulation materials to form a thermal insulation layer 33. That is to say, the thermal insulation layer 33 can not only insulate the outside of the preheating air cavity 32, but also insulate the entire furnace body 1.

[0052] The shape of the infrared generating circle 31 matches the shape of the pot bottom. The infrared generating circle 31 is an annular structure. The annular structure includes a strictly circular ring structure, and also includes a triangular ring or a polygonal ring surrounded by three sides, four sides or more. The infrared generating circle 31 in this embodiment is an annular structure, and the infrared generating circle 31 is a trumpet-shaped with a gradually increasing opening. A plurality of pot bottom brackets 35 are arranged along the circumferential direction at the upper end of the infrared generating circle 31. The pot bottom brackets 35 can be annular or can be a protruding block arranged on the surface of the infrared generating circle 31.

[0053] When in use, the pot is mounted on the pot bottom support 35, the pot is mounted above the infrared generating circle 31, the infrared generating circle 31 surrounds the bottom of the pot, and the gap between the infrared generating circle 31 and the pot bottom reserves a channel for the flame generated by the primary combustion, providing a place for infrared generation. When solid fuel (such as firewood) burns in the furnace 2, the flame moves upward, flows along the bottom of the pot after encountering it, heats the infrared generating circle 31, and then heats the air in the preheating air cavity 32.

[0054] The side of the infrared generating circle 31 close to the bottom of the pot is the infrared generating area. The preheating air cavity 32 is a hollow structure, and the preheating air duct 34 is connected to the bottom of the preheating air cavity 32. The end of the preheating air duct 34 away from the preheating air cavity 32 is arranged at the bottom of the furnace body 1 and corresponds to the position of the furnace 2, so that when the air passes through the preheating air duct 34, it can flow upward along the outside of the furnace 2, so that there is a longer time to use the heat of the furnace 2 to heat the air, thereby improving the utilization rate of the waste heat energy of the furnace 2.

[0055] In one embodiment, the furnace 2 includes a gasification chamber 21 and a combustion chamber 22 disposed above the gasification chamber 21 .

[0056] A gasification gas passage 211 is provided on the outer wall of the gasification chamber 21, and a plurality of gasification air outlets 212 are provided through the side wall of the gasification chamber 21; one end of the gasification gas passage 211 is connected to the outside air of the furnace body 1, and the other end is connected to the gasification air outlet 212. The gasification air outlets 212 are evenly distributed on the side wall of the gasification chamber 21. A gasification damper 213 is provided at one end of the gasification gas passage 211 away from the gasification chamber 21, and the air intake of the gasification gas passage 211 can be adjusted by adjusting the opening size of the gasification damper 213.

[0057] The outer wall of the combustion chamber 22 is provided with a combustion air passage 221, and a plurality of combustion air outlets 222 are provided through the side wall of the combustion chamber 22; one end of the combustion air passage 221 is connected to the outside air of the furnace body 1, and the other end is connected to the combustion air outlet 222. The combustion air outlets 222 are evenly distributed on the side wall of the combustion chamber 22. A combustion air door 223 is provided at the other end of the combustion air passage 221 away from the combustion chamber 22, and the air intake of the combustion air passage 221 can be adjusted by adjusting the opening size of the combustion air door 223.

[0058] The preheating air door 341, the combustion air door 223 and the gasification air door 213 in this embodiment have the same structure. Specifically, at the air inlets of the preheating air channel 34, the combustion air channel 221 and the gasification air channel 211, a plurality of air inlet holes 41 are correspondingly arranged in the circumferential direction of the side wall of the furnace body 1, and an adjustment ring 42 is arranged on the inner side wall of the furnace body 1, and the adjustment ring 42 can be rotated on the inner side of the furnace body 1, and the adjustment ring 42 is arranged with adjustment holes 421 corresponding to the plurality of air inlet holes 41. At the same time, the adjustment ring 42 is also connected to the adjustment rod 43, and the adjustment rod 43 extends out of the furnace body 1. The adjustment ring 42 is rotated by the adjustment rod 43 to adjust the overlap between the adjustment hole 421 and the air inlet hole 41, so as to adjust the size of the air intake.

[0059] In specific use, during the ignition stage, the damper of the gasification chamber 21 can be opened wide to provide sufficient primary air. During the stable combustion stage, the damper size of the gasification chamber 21 can be adjusted according to the humidity and combustion speed of the fuel. When the humidity of the fuel is high, the damper can be adjusted large to increase oxygen supply and promote gasification. When the humidity of the fuel is low, the damper of the gasification chamber 21 can be adjusted small to increase the damper of the combustion chamber 22 to slow down the gasification speed of the fuel, so that the fuel is slowly gasified to avoid the dry fuel being gasified in large quantities and not being able to burn in time to form carbon particles and smoke. During the stable combustion stage, when a high fire is needed, the dampers of the gasification chamber 21 and the combustion chamber 22 can be opened to reduce the unburned carbon particles and smoke from entering the inner side of the infrared generating circle. When the stove is finished using, the fuel will form charcoal after gasification. The charcoal has a high calorific value and can continue to burn into ashes without smoke. At this time, less oxygen is needed. The damper 21 of the gasification chamber can be closed, and the damper of the combustion chamber 22 and the damper of the preheating air duct 34 can be closed to release heat slowly and extend the furnace temperature duration. When a second ignition is needed at this time, a small amount of fuel can be added and the damper of the gasification chamber 21 can be opened to resume combustion.

[0060] In one embodiment, the preheating gas channel 34 , the combustion gas channel 221 , and the gasification gas channel 211 are all disposed at the periphery of the gasification chamber 21 , and the preheating gas channel 34 , the combustion gas channel 221 , and the gasification gas channel 211 are sequentially arranged in layers from the outside to the inside.

[0061] Specifically, the gasification gas duct 211 is arranged on the outside of the gasification chamber 21, followed by the gasification gas duct 211 and the preheating gas duct 34. The heat generated in the gasification chamber 21 can first heat up the gasification gas duct 211, thereby increasing the speed at which the solid fuel in the gasification chamber 21 dries and loses moisture, so that the solid fuel can dry as quickly as possible to produce combustible volatile substances. The combustion gas duct 221 is arranged on the outside of the gasification gas duct 211, so that the residual heat outside the gasification gas duct 211 can heat up the combustion gas duct 221, so that after the air enters the combustion chamber 22 from the combustion gas duct 221, and the length of the combustion gas duct 221 is longer than that of the gasification gas duct 211, the air already has a certain temperature, so that it can better participate in the combustion in the combustion chamber 22.

[0062] In addition, although the preheating air channel 34 is arranged at the outermost layer, the preheating path of the preheating air channel 34 is long, so that sufficient preheating can be performed on the outside of the combustion chamber 22 and the gasification chamber 21, and when the air enters the preheating air cavity 32, the primary flame inside the infrared generating circle 31 can also preheat the air in the preheating air cavity 32, so that the air can be heated to a higher temperature when it is ejected from the preheating air outlet 311, thereby ensuring the efficiency of the secondary combustion.

[0063] In one embodiment, a plurality of gasification baffles 214 are arranged on the outer wall of the gasification chamber 21 and are distributed along the axial direction of the gasification chamber 21. The gasification baffles 214 in this embodiment are truncated cone-shaped. The gasification air passage 211 is divided into a plurality of gasification partitions 215 by the plurality of gasification partitions 214. One end of each gasification partition 215 is connected to the gasification air passage 211, and the other end is connected to the gasification air outlet 212.

[0064] The gasification partition 215 can separate the air in the gasification gas channel 211, so that the air can flow in an orderly manner outside the gasification chamber 21, and the air can stably enter the gasification chamber 21 through the gasification partition 215, so that the solid fuel gasification process inside the gasification chamber 21 can be more stable. At the same time, even if there is wind from the outside blowing into the gasification gas channel 211, the gasification partition 214 can also play a diversion role for the outside wind, thereby reducing the impact of the outside wind on the combustion in the gasification chamber 21.

[0065] In one embodiment, a grate 23 is provided at the bottom of the furnace 2, and a dust collector is provided at the bottom of the grate 23.

[0066] The grate 23 is provided with perforations, and the remaining ashes after the solid fuel is burned can fall into the dust collector from the perforations on the grate 23. The dust collector in this embodiment is a drawer 24 arranged at the bottom of the furnace 2, and the ashes can be poured out by pulling out the drawer 24. In addition, since the drawer 24 is connected to the outside air, opening the drawer 24 can allow air to enter the furnace through the grate 23 to participate in the combustion. For example, in the ignition stage, if more primary air is needed, and in the flameout stage, when the charcoal needs to burn out quickly, the drawer 24 can be appropriately opened.

[0067] When in use, after ignition, the solid fuel is placed in the gasification chamber 21, and the hot air of the combustion flows upward. The air is sucked into the gasification chamber 21 from the gasification damper 213. At this time, the temperature of the gasification chamber 21 rises rapidly, heating the inner wall of the gasification chamber 21, and further the combustion-supporting air entering from the gasification gas channel 211. After gradually heating up, the gasification chamber 21 reaches the gasification condition, and the generated flame and the combustible volatile substance mixture are ignited by the high-temperature air when passing through the combustion air outlet 222 of the combustion chamber 22 (primary combustion). The flame generated by the primary combustion flows along the bottom of the pot, and at the same time heats the infrared generating circle 31, so that the air temperature in the preheating air cavity 32 increases. The heated air in the preheating air cavity 32 is ejected from the preheating air outlet 311, reacts with the incompletely burned volatile substances in the primary combustion flame, and performs secondary combustion. The high temperature generated by the secondary combustion is dispersed along the bottom of the pot, and the high temperature generated by the chemical reaction of the secondary combustion directly forms a large amount of thermal convection impact on the bottom of the pot, so that the secondary combustion material is completely burned under the impact of the high-temperature air, achieving flameless combustion. The uniform and intense combustion releases high energy and emits infrared rays. The combustion reaction between the hot air ejected from the preheating air outlet 311 and the high-speed combustible volatile substance mixture triggers thermal convection, and the infrared radiation generated by the infrared generating circle 31 improves the thermal efficiency. In this high-temperature infrared radiation environment, the volatile substances that are not completely burned out are fully burned, so that the volatile substances cooled by the bottom of the pot are reignited. In the high-temperature air combustion-supporting environment heated in the preheating air cavity 32, the volatile substances are completely burned, so that the phenomenon of black pot will not occur.

[0068] When using firewood fuel outdoors, due to portability requirements, chimneys 52 and firewood adding ports are not configured. When using, it is necessary to remove the pot and add firewood from the top. Because the gasification air outlets 212 of the gasification chamber 21 are widely distributed, the oxygen supply is controllable, and the combustion is sufficient and orderly, firewood can be continuously added from the top, and the ashes after burning are discharged from the lower grate 23. Because the solid fuel and the flame are wrapped and insulated by the furnace body 1, the heat waste is limited, the air preheating effect of the gasification chamber 21 is good, and the amount and frequency of adding firewood are not high. After testing, adding fuel once about ten minutes after full startup can achieve continuous and stable combustion. Sufficient preheating and widely distributed gasification air outlets 212 make the stove not picky about firewood. The firewood obtained outdoors is exposed to the natural environment, which is usually high in humidity. After entering the gasification chamber 21, the moisture contained in it encounters a high-temperature carbon particle environment to undergo a reduction reaction to generate carbon monoxide and hydrogen, which is more conducive to subsequent combustion reactions. In actual use, firewood with high humidity is used, and the flame gas burning at the outlet of the gasification chamber 21 is transparent or blue-green with part of orange, and has little or no odor. Within half an hour without adding firewood, since the embers of the gasification chamber 21 are still there, adding firewood again can quickly restart, which has good practicality.

[0069] Example 3: Figure 4As shown, the structure of this embodiment is similar to that of Embodiment 2, except that a return air cavity 5 is provided on the outer side of the preheating air cavity 32, and the return air cavity 5 is in contact with the preheating air cavity 32; a return air port 51 is provided on the top of the furnace ring assembly 3, and the return air port 51 is in a circular shape. After the smoke enters the return air cavity through the return air port 51, it is discharged to the outside of the furnace body 1.

[0070] In one embodiment, if Figure 5 As shown, the other end of the return air chamber away from the return air outlet 51 is connected to the chimney 52. ​​The pot bottom support 35 in this embodiment is annular, and the pot bottom support 35 is arranged above the return air outlet 51.

[0071] In one embodiment, if Figure 6 As shown, a feeding tube 53 is provided on the side wall of the gasification chamber 21 , and a transparent fire viewing cover 54 is provided on the end of the feeding tube 53 away from the gasification chamber 21 .

[0072] When the pot is placed on the pot bottom support 35, the smoke enters the chimney 52 from the return air cavity 5, and the high-temperature smoke passing through the return air cavity 5 impacts the outer wall of the preheating air cavity 32, thereby heating the air in the preheating air cavity 32, realizing the secondary utilization of the heat of the smoke, and reducing the waste of the heat of the smoke. After the chimney 52 is started, the fire viewing cover 54 is opened. Due to the suction negative pressure of the chimney 52, the flame gas will not be ejected from the charging tube 53. After the pot is removed, the flame gas is directly discharged from the top of the furnace 2, so it will not be ejected from the charging tube 53. The addition of the charging tube 53 can observe the combustion situation inside the furnace body 1 without removing the pot, avoid the heat diffusion of the infrared generating circle 31 caused by frequently removing the pot, affect the air preheating and secondary combustion reaction in the preheating air cavity 32, and is conducive to the cooking of food in the pot. At the same time, the gas after combustion can be discharged to other spaces, away from the cooker, and can also be suitable for indoor use. In actual use, due to complete digestion and sufficient heat absorption, the exhaust flue gas is colorless. When the temperature is low in winter, the water vapor contained in the exhaust flue gas will condense and precipitate white mist.

[0073] Example 4: Figure 7As shown, this embodiment is similar in structure to Embodiment 2 or Embodiment 3, except that an airway baffle 6 is provided on the outside of the furnace 2, and the airway baffle 6 cooperates with the outer wall of the furnace 2 to form a collection inner channel 61, and the gasification gas channel 211 and the combustion gas channel 221 are both provided in the collection inner channel 61, and the top of the collection inner channel 61 is connected to the bottom of the air preheating chamber. A collection outer channel 62 is provided on the outside of the airway baffle 6, and the collection outer channel 62 is connected to the outside of the furnace body 1. Specifically, an air inlet 621 is provided at the bottom of the collection outer channel 62, and a plurality of baffle perforations 63 are provided on the airway baffle 6 to connect the collection outer channel 62 with the collection inner channel 61. The baffle perforations 63 in this embodiment are provided at the top of the gasification chamber 21. The outside air enters the collecting outer channel 62 from the main air inlet 621, and then enters the collecting inner channel 61 from the partition perforation 63. The air in the collecting inner channel 61 is divided into two upper and lower paths. The lower air enters the vaporization chamber 21 to participate in vaporization, and the upper air enters the preheating air cavity 32.

[0074] In this embodiment, a collecting inner channel 61 is arranged between the gas channel partition 6 and the furnace 2, and the gasification gas channel 211 and the combustion gas channel 221 are combined and arranged in the collecting inner channel 61, so that the internal structure of the furnace body 1 is simpler. At the same time, once the air enters the collecting inner channel 61, it begins to absorb heat, and then enters the collecting inner channel 61, so that the air can be immediately preheated. When the air enters the gasification chamber 21 downward in the collecting inner channel 61, the gasification chamber 21 flows downward, which can better complete the gasification reaction; and when the air enters the preheating air cavity 32 upward in the collecting inner channel 61, it can also be well preheated. After the preheated air goes out from the preheating air outlet 311, it participates in the secondary combustion and generates infrared radiation.

[0075] Example 5: Figure 8 As shown, the structure of this embodiment is similar to that of Embodiment 4, except that a plurality of layers of outer channel partitions 64 surrounding the outer side of the furnace 2 are arranged on the inner side of the aggregated outer channel 62, and the plurality of layers of outer channel partitions 64 divide the aggregated outer channel 62 into layered outer channels 65, and adjacent layered outer channels 65 are connected to form a curved outer channel.

[0076] The curved outer passage can extend the air flow path, so that the heat outside the gasification chamber 21 can be fully absorbed, the heat utilization rate is improved, and the temperature of the surface of the furnace body 1 is reduced.

[0077] In one embodiment, a top baffle 643 is provided at a position that fits the return air cavity, and the top baffle 643 and the side wall of the return air cavity 5 form a top outer channel 653. After the air enters the collecting outer channel 62, it first passes through the top outer channel 653 and then enters the curved outer channel.

[0078] Since the outside air temperature is low, once the smoke in the return air cavity 5 is discharged, the heat cannot be utilized. Therefore, when the outside air passes through the top outer channel 653, it can first absorb the heat of the smoke in the return air cavity 5, thereby improving the utilization rate of the heat in the return air cavity 5.

[0079] In one embodiment, an air intake fan 66 is disposed at the main air intake port 621 .

[0080] The air intake fan 66 can blow air into the outer channel 62, thereby improving the air intake efficiency of the outer channel 62, so that the fuel can obtain more air, thereby improving the combustion efficiency of the fuel. When the fuel burns normally, a siphon effect can be generated in the curved outer channel, which means that the air intake fan 66 will not consume more power due to the setting of the outer channel partition 64.

[0081] This embodiment 6: Figure 8 As shown, the structure of this embodiment is similar to that of Embodiment 5, except that the outer partition plate 64 is provided with two layers, namely, a first partition plate 641 and a second partition plate 642 from the inside to the outside.

[0082] The first baffle 641 and the second baffle 642 cooperate to form the second outer channel 652, the airway baffle 6 and the first baffle 641 cooperate to form the first outer channel 651, and the airway baffle 6 and the outer wall of the vaporization chamber 21 cooperate to form the inner channel 61. The top outer channel 653 is connected to the top of the second outer channel 652.

[0083] A flow dividing opening 654 is provided at the bottom of the first partition plate 641. After the air enters the second outer channel 652, it enters the first outer channel 651 from the flow dividing opening 654. A self-suction damper 655 is provided at the bottom of the third partition plate. The structure of the self-suction damper 655 is the same as that of the preheating damper 341, the gasification damper 213 and the combustion damper 223.

[0084] Due to the suction effect of the chimney 52, the self-priming damper 655 at the bottom can be opened after the system is stable, and the fan can be turned off to save energy. Air can enter the first outer channel 651 through the self-priming damper 655, and then enter the collecting inner channel 61 to participate in the reaction.

[0085] Example 7: Figures 1 to 9 As shown, the structures of the embodiments 1 to 6 are similar, except that an air outlet nozzle 7 is provided at the preheated air outlet 311. The air outlet nozzle 7 is a tubular structure, and the air outlet nozzle 7 can be a separate component, or can be integrally formed with the infrared generating coil 31.

[0086] According to the Venturi effect, low pressure will be generated near the high-speed flowing fluid, thus generating a suction effect. The negative pressure generated by the upward flow of the gas flame and the kinetic energy generated by the preheated air from the bottom to the top make the air at the preheated air outlet 311 flow out automatically, while also ensuring that the siphon structure set up inside to absorb the dissipated heat can operate. Due to the inertial effect, the momentum direction of the air flowing out of the tubular structure outlet nozzle 7 after flowing out is related to the tilted twisting and spiraling mode of the tubular structure outlet nozzle 7. The high-temperature air ejected is perpendicular or tilted to the flow direction of the gas flame, which can significantly improve the convective heat reaction between the high-temperature air and the flame. The preheated air outlet 311 can further optimize the combustion reaction under such heat convection conditions.

[0087] In addition, the area of ​​the secondary combustion reaction is moved upward due to the extension of the tubular gas outlet 7 structure, and is closer to the bottom of the heated appliance, thereby improving the thermal efficiency. At the same time, the extension of the tubular gas outlet 7 structure leaves a channel for the exhaust of smoke, thereby avoiding the situation where the exhaust space of smoke is narrow and the combustion reaction is insufficient in order to improve the thermal efficiency.

[0088] In one embodiment, a plurality of partitions 8 are arranged along the axial direction of the preheating air cavity 32, and the partitions 8 are spiral-shaped. The spiral partitions 8 divide the preheating air cavity 32 into a plurality of spiral preheating air cavities 32. Of course, the partitions can also be arranged in other shapes, such as a spoke shape.

[0089] The spiral dividing block 8 in this embodiment divides the air preheating chamber into a plurality of preheating small chambers, so that the air entering the preheating small chamber is forced to flow along a curved path, thereby increasing the flow path of the preheating air, making the path of the preheating air longer, and the flow time longer, so that the preheating air undergoes more sufficient heat exchange in the preheating small chamber, making the preheated air temperature higher. After reaching the preheating air outlet 311, it is ejected tangentially, forming a certain swirl effect.

[0090] In addition, adjacent preheating chambers are isolated from each other, and the flow of air in each preheating chamber will not be affected by other preheating chambers, so that the air flows more stably in each preheating chamber, and the preheating air flowing out of the preheating air outlet 311 is also more stable, which makes the secondary combustion of the gas more stable, thereby improving the efficiency of the secondary combustion of the gas.

[0091] Example 8: Fig.10 and Fig.11As shown, the structure of this embodiment is similar to that of Embodiment 2, Embodiment 3, and Embodiment 7, except that the inner side wall of the gasification chamber 21 is formed by stacking a plurality of layers of gasification frames 216, and after stacking, the gasification frames 216 are fixed together by methods including but not limited to welding. The gasification frame 216 in this embodiment is annular, but the gasification frame 216 can also be set to a polygon such as a triangle or a quadrilateral (for example, a hexagon or an octagon). A plurality of gasification air outlets 212 are provided on the side wall of the gasification frame 216, and the gasification air outlets 212 in this embodiment are arranged in a circle along the side wall of the gasification frame. A gasification hood 217 is provided in the outer circumferential direction of each layer of the gasification frame 216, and the gasification hoods of two adjacent gasification frames overlap to form a gasification partition 215.

[0092] A moving wheel 9 for facilitating the movement of the furnace body is arranged at the bottom of the furnace body 1. A pot 11 cooperating with the infrared generating circle 31 is arranged inside the infrared generating circle 31.

[0093] In the above-mentioned embodiments, the inner side wall of the gasification chamber 21 is basically an integrally formed structure. Once defective products are produced due to processing, the entire structure will be discarded, increasing production costs. In this embodiment, the gasification chamber 21 is stacked by a plurality of layers of gasification frames 216. The gasification frames 216 can be manufactured in batches during processing and manufacturing. Even if one of the gasification frames 216 has a quality problem, the gasification frame 216 with the quality problem can be directly replaced, reducing production costs.

[0094] Example 9: Fig.12 As shown, the structure of this embodiment is similar to that of Embodiment 8, except that, in this embodiment, a refractory layer 25 is provided along the inner wall of the gasification chamber 21, the inner wall of the combustion chamber 22 and the inner wall of the infrared generating circle 31, and the refractory layer 25 is filled with refractory material. The refractory layer 25 in this embodiment is made of refractory clay in one-time molding.

[0095] Since the refractory layer 25 is relatively thick, tubular air nozzles 251 are provided at the gasification air outlet 212 , the combustion air outlet 222 and the preheating air outlet 311 , and the tubular air nozzles 251 penetrate the refractory layer 25 .

[0096] The gasification chamber 21, the combustion chamber 22 and the infrared generating ring 31 are usually made of metal materials such as stainless steel. Under the combustion of high-temperature flames, the gasification chamber 21, the combustion chamber 22 and the infrared generating ring 23 are easily oxidized, thereby increasing the loss of the gasification chamber, the combustion chamber and the infrared generating ring. The refractory layer 25 is provided to prevent the flame from directly contacting the gasification chamber 21, the combustion chamber 22 and the infrared generating ring 31, thereby protecting the gasification chamber 21, the combustion chamber 22 and the infrared generating ring 31 and extending the service life.

[0097] Example 10: Fig.13As shown, the structure of this embodiment is similar to that of Embodiment 2, Embodiment 3, and Embodiment 7, except that in this embodiment, a plurality of reflow annular grooves 312 arranged along the axial direction are arranged on the inner side wall of the infrared generating circle 31. As shown in the figure, the reflow annular grooves 312 in this embodiment are arranged in two circles.

[0098] The setting of the reflow annular groove 312 allows the smoke to reflux in the reflow annular groove 312, thereby increasing the time the smoke stays between the infrared generating circle 31 and the bottom of the pot, thereby increasing the combustion time, making the combustible volatile substances in the smoke burn more fully, and improving the combustion efficiency. In addition, when the smoke flows in the reflow annular groove 312, due to the longer time the smoke stays in the reflow annular groove 312, the heat of the smoke can also be better absorbed by the preheating air cavity 32.

[0099] Example 11: Reference Fig.14 As shown, the structure of this embodiment is similar to that of Embodiment 1, Embodiment 2, and Embodiment 3, except that the bottom of the pot in this embodiment is cylindrical (columnar); therefore, the shape of the infrared generating circle 31 is also cylindrical. A pot cover 12 matching the pot is provided on the top of the pot.

[0100] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A solid fuel gasifier, characterized in that: include: A furnace chamber disposed within the furnace body; The furnace ring assembly is arranged on the top of the furnace; the furnace ring assembly includes an infrared generating ring and a preheating air cavity, and the preheating air cavity is arranged outside the infrared generating ring; A preheating air duct is arranged in the furnace body, and the preheating air cavity is connected with the outside of the furnace body through the preheating air duct. A plurality of preheating air outlets are arranged through the side wall of the infrared generating circle. The air enters the furnace body from the preheating air duct, and after being heated in the furnace body, it enters the preheating air cavity, and finally enters the inner side of the infrared generating circle from the preheating air outlet to participate in secondary combustion.

2. The solid fuel gasifier according to claim 1, characterized in that: The furnace includes a gasification chamber and a combustion chamber arranged above the gasification chamber; The outer wall of the gasification chamber is provided with a gasification gas channel, and the side wall of the gasification chamber is penetrated with a plurality of gasification air outlets; one end of the gasification gas channel is connected to the outside air of the furnace body, and the other end is connected to the gasification air outlet; The outer wall of the combustion chamber is provided with a combustion air passage, and the side wall of the combustion chamber is penetrated with a plurality of combustion air outlets; one end of the combustion air passage is connected with the outside air of the furnace body, and the other end is connected with the combustion air outlet.

3. The solid fuel gasifier according to claim 2, characterized in that: The preheating gas passage, the combustion gas passage and the gasification gas passage are all arranged on the periphery of the gasification chamber, and the preheating gas passage, the combustion gas passage and the gasification gas passage are arranged in layers from the outside to the inside.

4. The solid fuel gasifier according to claim 2, characterized in that: A plurality of gasification partitions are arranged on the outer wall of the gasification chamber and are distributed along the axial direction of the gasification chamber. The plurality of gasification partitions divide the gasification gas passage into a plurality of gasification partitions. One end of each gasification partition is connected to the gasification gas passage, and the other end is connected to the gasification air outlet.

5. The solid fuel gasifier according to claim 2, characterized in that: An air duct partition is arranged on the outer side of the furnace, and the air duct partition and the furnace cooperate to form a collective inner channel. The gasification gas channel and the combustion gas channel are both arranged in the collective inner channel, and the collective inner channel is connected with the air preheating chamber; an aggregate outer channel is arranged on the outer side of the air duct partition, and the aggregate outer channel is connected with the outer side of the furnace body, and a number of partition perforations connecting the aggregate outer channel and the aggregate inner channel are arranged on the air duct partition.

6. The solid fuel gasifier according to claim 5, characterized in that The inner side of the aggregated outer channel is provided with several layers of outer channel partitions surrounding the outer side of the furnace, and the several layers of outer channel partitions divide the aggregated outer channel into layered outer channels, and adjacent layered outer channels are connected to form a curved outer channel.

7. The solid fuel gasifier according to claim 5 or 6, characterized in that: An aggregate outer channel is arranged on the outer side of the air channel partition, an air inlet is arranged at the bottom of the aggregate outer channel, and an air inlet fan is arranged at the air inlet.

8. The solid fuel gasifier according to any one of claims 1 to 6, characterized in that: A return air cavity is arranged outside the preheating air cavity, and the return air cavity is fitted with the preheating air cavity; a return air port is arranged on the top of the furnace ring assembly, and the smoke enters the return air cavity through the return air port and is discharged to the outside of the furnace body.

9. The solid fuel gasifier according to any one of claims 1 to 6, characterized in that: A plurality of dividing blocks are arranged in the preheating air cavity along the axial direction thereof, wherein the dividing blocks are spiral-shaped and the spiral-shaped dividing blocks divide the preheating air cavity into a plurality of spiral-shaped preheating air cavities.

10. The solid fuel gasifier according to any one of claims 1 to 6, characterized in that: A grate is arranged at the bottom of the furnace, and a dust collector is arranged at the bottom of the grate.

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