A wood-fired gasifier

Abstract

The present invention discloses a firewood gasification furnace, which aims to solve the problem in the prior art that when the firewood furnace is burning, air directly enters the firewood furnace to burn with the fuel, thereby reducing the temperature inside the furnace body and affecting the normal combustion of the fuel. The present invention adopts the following technical solutions to solve the above technical problems: comprising a furnace body, the furnace body comprising a combustion chamber and a preheating chamber arranged outside the combustion chamber; a plurality of partitions are arranged in the preheating chamber along the vertical direction, and the plurality of partitions divide the preheating chamber into a plurality of preheating channels; an air inlet is arranged on the outer wall of the plurality of preheating channels, and an air outlet connected to the combustion chamber is arranged through the inner wall of the plurality of preheating channels, and the air outlet is higher than the air inlet in the vertical direction; air enters the preheating channel from the air inlet, and the air flows through the preheating channel to be preheated, and then enters the combustion chamber from the air outlet to participate in the combustion.

Description

Technical Field

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

[0002] An outdoor wood stove is a tool used to make fire and provide energy when camping or playing outdoors. It is loved by outdoor players because of its small size, strong portability, low risk, and low risk of causing fire.

[0003] When the wood stove in the prior art is burning, air directly enters the combustion chamber to participate in the reaction. Since the temperature of the external air is lower than the temperature in the combustion chamber, the low-temperature air will inevitably absorb a part of the heat in the furnace body when participating in the combustion, thereby lowering the temperature inside the furnace body and affecting the normal combustion of the fuel; and when the low-temperature air meets the combustible substances in the combustion chamber, carbon black is easily precipitated, resulting in incomplete combustion of the fuel and low efficiency of fuel combustion. Summary of the invention

[0004] The present invention overcomes the problems in the prior art that when a wood stove is burning, air directly enters the wood stove to burn with the fuel, thereby reducing the temperature inside the stove body and affecting the normal combustion of the fuel; and when the low-temperature air meets the combustible material in the combustion chamber, carbon black is easily precipitated, resulting in incomplete combustion of the fuel and reduced efficiency of fuel combustion; a wood gasification furnace is provided, which can preheat the air before the air enters the combustion chamber, so that the air has reached or is close to the combustion temperature when entering the combustion chamber, thereby reducing or even eliminating the influence of the low-temperature air on the combustion of the fuel, and can improve the combustion efficiency of the fuel compared to the prior art; and in the present application, the air is heated by preheating the air outside the combustion chamber, which can reduce heat waste and improve heat utilization.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a wood-fired gasification furnace, comprising a furnace body, the furnace body comprising a combustion chamber and a preheating chamber arranged outside the combustion chamber; A plurality of partitions are arranged in the preheating chamber along the vertical direction, and the plurality of partitions divide the preheating chamber into a plurality of preheating channels; The outer side walls of the plurality of preheating channels are provided with air inlets, and the inner side walls of the plurality of preheating channels are provided with air outlets communicating with the combustion chamber, wherein the air outlets are higher than the air inlets in the vertical direction; Air enters the preheating channel from the air inlet, is preheated when passing through the preheating channel, and then enters the combustion chamber from the air outlet to participate in combustion.

[0006] In the present invention, the fuel participates in the combustion reaction in the combustion chamber, and when the air passes through the preheating chamber, the furnace wall is heated by the reaction heat inside the furnace body. Due to the induced effect of the flame airflow and the rising power of the low-density hot air, the air automatically passes through the preheating chamber and absorbs the heat on the furnace wall to be heated. The high-temperature air flows out from the air outlet and participates in the gasification combustion reaction. When the air enters the combustion chamber, it has reached or is close to the combustion temperature, thereby reducing or even eliminating the impact of low-temperature air on fuel combustion. Compared with the prior art, the combustion efficiency of the fuel can be improved; and in this application, the air is heated by using the waste heat outside the combustion chamber to preheat the air, which can reduce heat waste and improve heat utilization.

[0007] Preferably, the preheating channel is stepped, and a plurality of partition walls are arranged in the preheating channel, the plurality of partition walls divide the preheating channel into a plurality of small chambers wrapped in layers, and the partition walls are provided with connecting holes connecting adjacent small chambers.

[0008] In the vertical direction, the more outlets are distributed, the better the gasification effect is, and the fewer inner preheating chamber shells will correspond to too many outlets. In order to prevent the air from being preheated only by the preheating channel where it is located, a partition wall is set in the preheating channel. The partition wall divides the stepped preheating channel into several small chambers, and the number of small chambers gradually increases as it approaches the combustion chamber, and the volume of the small chamber gradually decreases. Figure 2 As shown in the figure, the preheating channel is divided into two layers, inner and outer, by a partition wall. The inner end of the preheating channel is divided into two small chambers, and the outer end of the preheating channel is divided into a small chamber. The small chamber at the inner end of the preheating channel forms a wrapping effect, that is, a wrapped chamber is formed. By analogy, multiple layers of small chambers can also be set outside to form a wrapped chamber. The wrapped chamber has the following functions: (1) It allows the preheated air to flow from the outer wrapped chamber to the inner small chamber, and the temperature gradient gradually increases on the flow path, and preheating is carried out in an orderly manner. (2) It further increases the height difference of the independent air intake (increases the height difference between the air inlet and the air outlet), and improves the flow dynamics of the air outlet of the independent air intake. (3) The cavity shell area in the preheating channel is increased due to nesting, which further increases the heat exchange surface and improves the preheating efficiency. (4) The nested small chambers and partition walls further block the heat from spreading outward. Instead, the heat conducted to the outside is brought back into the furnace by the preheated air to participate in gasification and combustion, reducing heat waste and improving heat utilization. (5) Under the premise of ensuring a large height difference between the inlet and outlet of the independent preheating channel, the outlets of each segment can be spaced closer in height and distributed more, thereby further promoting gasification and combustion.

[0009] Preferably, the furnace body includes a plurality of stacked units; the stacked units include a center sleeve and a guide sleeve arranged outside the center sleeve. When the plurality of stacked units are stacked together, the center sleeves cooperate with each other to form a combustion chamber, and adjacent guide sleeves cooperate to form a preheating channel.

[0010] The furnace body is arranged to be composed of a plurality of stacking units, so that when in use, a suitable number of stacking units can be selected according to actual needs, and the furnace has the characteristic of flexible use method.

[0011] Preferably, the plurality of stacking units are of the same size.

[0012] Each stacking unit in this embodiment is identical and can be made of the same standard profile when in use, thereby simplifying the production process; due to the standard size, the furnace body height can be freely stacked by adding a slot.

[0013] Preferably, the stacking unit comprises a plurality of unit plates connected along a circumferential direction, wherein the unit plates comprise a center plate and a guide plate; when a plurality of center plates are combined into a stacking unit, the center plates are connected to form a center sleeve, and the guide plates are connected to form a guide sleeve.

[0014] The stacking unit is further disassembled into unit plates, so that the whole furnace body can be disassembled into the unit plate structure, and the disassembled unit plates are stored in the cooker, so that the overall volume is reduced and convenient to carry. When in use, the unit plates are first assembled into the stacking unit, and then the stacking unit is assembled into the furnace body.

[0015] Preferably, the volumes of the plurality of stacking units gradually decrease from bottom to top; when folded, the upper stacking unit can be folded into the lower stacking unit.

[0016] After the stacking units are assembled into a furnace body, the overall shape of the furnace body is a pyramid or truncated cone that gradually shrinks from bottom to top, so that when the stacking units are disassembled, the upper stacking units can be stored in the lower stacking units in turn, thereby reducing the volume after storage.

[0017] Preferably, the furnace body includes a plurality of suite units that are slidably connected to each other, the suite units include an inner sleeve and an outer sleeve, and the inner sleeve and the outer sleeve are connected by a partition sleeve plate; when contracted, the plurality of suite units are nested and contracted to reduce their volume; when extended, the supporting assembly enables the plurality of suite units to remain in an extended state, the plurality of inner sleeves cooperate to form a combustion chamber, and adjacent partition sleeve plates cooperate to form a preheating channel.

[0018] The above solution makes the furnace body unfolding and storage process more convenient. There is no need to assemble the structure of each layer. The furnace body can be unfolded by pulling the uppermost kit unit when in use.

[0019] Preferably, the support assembly comprises a plurality of support sleeves slidably connected to each other; the plurality of support sleeves are arranged outside the plurality of kit units; The lowermost support sleeve is fixedly connected to the lower set unit, and the uppermost support sleeve is fixedly connected to the upper set unit; When extended, the adjacent support sleeves are kept in an extended state by the locking pieces, and the kit unit is in an extended state; During contraction, the locking piece is released, and a plurality of support sleeves and a plurality of kit units are contracted, and the volume is reduced.

[0020] In this embodiment, it is only necessary to rotate the threads between the support sleeves to unfold several layers of the kit units, without rotating each layer of the kit units, so that the unfolding of several kit units can be more convenient and quick.

[0021] Preferably, the support assembly includes a plurality of support flaps and support edge plates arranged on the outer sliding sleeve; the support flaps are rotatably arranged on the outer sliding sleeve, and the support edge plates slide in adjacent outer sliding sleeves; When extended, several kit units are in an upright state, the support flaps are kept in a supported state by gravity, and the support edges of adjacent kits are supported on the support flaps; When the device is retracted, several kit units are inverted, and the supporting flap is rotated by gravity to maintain the retracted state, and the supporting edge plate can slide along the outer sliding sleeve.

[0022] Preferably, the furnace body is formed by a plurality of mutually hinged side wall panels; the side wall panels include inner side wall panels and outer side wall panels, the inner side wall panels and the outer side wall panels cooperate to form a preheating chamber, and the plurality of inner side wall panels together form a combustion chamber.

[0023] The furnace body is enclosed by several side wall panels to form a scroll style, which is convenient for storage and carrying. In addition, during the production process, it can be made into a large furnace and a small furnace according to actual needs, forming a scroll style, and finally configured with a buckle to make a large furnace.

[0024] Compared with the prior art, the present invention has the following beneficial effects: (1) The fuel participates in the combustion reaction in the combustion chamber. When the air passes through the preheating chamber, the furnace wall is heated by the reaction heat inside the furnace body. Due to the induced effect of the flame airflow and the rising power of the low-density hot air, the air automatically passes through the preheating chamber and absorbs the heat on the furnace wall to be heated. The high-temperature air flows out from the air outlet and participates in the gasification combustion reaction. When the air enters the combustion chamber, it has reached or is close to the combustion temperature, thereby reducing or even eliminating the impact of low-temperature air on fuel combustion. Compared with the prior art, it can improve the combustion efficiency of the fuel; and in this application, the air is heated by preheating the air outside the combustion chamber, which can reduce heat waste and improve heat utilization.

[0025] (2) In the present application, the stove body can be folded for easy storage and easy assembly when in use, which is very suitable for outdoor picnics. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the furnace body in Example 1 of the present invention.

[0027] Figure 2 It is a cross-sectional view of a furnace body in Example 2 of the present invention.

[0028] Figure 3 It is a cross-sectional view of a furnace body in Example 3 of the present invention.

[0029] Figure 4 It is a schematic diagram of the explosion of the furnace body in Example 3 of the present invention.

[0030] Figure 5 It is a cross-sectional view of a furnace body in Example 4 of the present invention.

[0031] Figure 6 It is a three-dimensional structural diagram of the furnace body in Example 4 of the present invention.

[0032] Figure 7 This is a structural diagram of the furnace body when it is stored in Example 4 of the present invention.

[0033] Figure 8 It is a three-dimensional structural diagram of the stacking unit in Example 4 of the present invention.

[0034] Fig. 9 It is a three-dimensional structural diagram of a unit plate in Example 4 of the present invention.

[0035] Fig.10 It is a three-dimensional structural diagram of a pot rack in Example 4 of the present invention.

[0036] Fig.11 It is a three-dimensional structural diagram of the grate in Example 4 of the present invention.

[0037] Fig.12 It is a cross-sectional view of a furnace body in Example 5 of the present invention.

[0038] Fig.13 This is a structural diagram of a furnace body housed in a cooker in Example 5 of the present invention.

[0039] Fig.14 It is a cross-sectional view of a furnace body in Example 6 of the present invention.

[0040] Fig.15 This is a cross-sectional view of a furnace body housed in a cooker in Example 6 of the present invention.

[0041] Fig.16It is a cross-sectional view of a furnace body in Example 7 of the present invention.

[0042] Fig.17 This is a cross-sectional view of the furnace body when it is stored in Example 7 of the present invention.

[0043] Fig.18 It is a three-dimensional structural diagram of the furnace body in Example 8 of the present invention.

[0044] Fig.19 It is a three-dimensional structural diagram of the kit unit in Example 8 of the present invention.

[0045] Fig. 20 It is a three-dimensional structural diagram of the furnace body in Example 8 of the present invention.

[0046] Fig.21 It is a cross-sectional view of the furnace body when it is unfolded in Example 8 of the present invention.

[0047] Fig. 22 This is a cross-sectional view of the furnace body when it is stored in Example 8 of the present invention.

[0048] Fig.23 It is a cross-sectional view of the furnace body when it is unfolded in Example 9 of the present invention.

[0049] Fig.24 This is a cross-sectional view of the furnace body when it is contracted in Example 9 of the present invention.

[0050] Fig.25 It is a cross-sectional view of the furnace body when it is unfolded in Example 10 of the present invention.

[0051] Fig.26 It is a three-dimensional structural diagram of the furnace body when it is unfolded in Example 10 of the present invention.

[0052] Fig. 27 It is a three-dimensional structural diagram of the switch sleeve in embodiment 10 of the present invention.

[0053] Fig.28 It is a cross-sectional view of the furnace body when it is unfolded in Example 11 of the present invention.

[0054] Fig.29 This is a cross-sectional view of the furnace body when it is contracted in Example 11 of the present invention.

[0055] Fig.30 It is a three-dimensional view of the furnace body when it is extended in Example 11 of the present invention.

[0056] Fig.31 It is a three-dimensional structural diagram of the furnace body when it is unfolded in Example 12 of the present invention.

[0057] Fig.32 It is a three-dimensional structural diagram of the furnace body when folded in Example 12 of the present invention.

[0058] Fig.33 It is a three-dimensional structural diagram of the side wall plate in Example 12 of the present invention.

[0059] Fig.34 It is a three-dimensional structural diagram of the furnace body when it is unfolded in another embodiment of Example 12 of the present invention.

[0060] Fig.35 It is a three-dimensional structural diagram of the furnace body when it is folded in another embodiment of Example 12 of the present invention.

[0061] Fig.36 It is the three-dimensional structure of the side wall plate in Example 12 of the present invention.

[0062] In the figure: 1, furnace body, 11, combustion chamber, 12, preheating chamber, 13, preheating channel, 131, air inlet, 132, air outlet, 14, grate, 15, inner preheating chamber shell, 16, outer preheating chamber shell, 17, tubular gas nozzle; 2. partition block, 21. partition wall, 211. communication hole; 3. pot rack, 31. pot rack plate, 32. pot rack groove, 33. ring handle; 4. stacking unit, 41. center sleeve, 42. guide sleeve, 421. abutment platform, 43. furnace sleeve, 44. base, 441. ash hopper, 46. unit plate, 461. center plate, 462. guide plate, 463. first upper slot, 464. first lower slot, 465. second upper slot, 466. second lower slot; 5. Main air door, 51. First inlet, 52. Air ring, 53. Second inlet, 54. Adjustment lever; 6. Kit unit, 61. Inner sliding sleeve, 62. Outer sliding sleeve, 621. Upper retaining ring, 622. Lower retaining ring, 63. Separating sleeve plate; 7. Support assembly, 71. External thread, 72. Internal thread, 73. Support sleeve, 731. Support internal thread, 732. Support external thread, 733. Support retaining ring, 74. Telescopic rod, 741. Sleeve, 742. Positioning pin, 743. Positioning spring, 75. Switch sleeve, 751. Switch hole, 752. Switch retaining piece, 753. Abutment spring, 754. Arc rod, 76. Support flap, 761. Articulated shaft, 77. Support edge plate, 78. Flipping gap; 8. Side wall panel, 81. Side wall inner panel, 82. Side wall outer panel. DETAILED DESCRIPTION

[0063] 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 Figures 1 to 36As shown, a wood-fired gasification furnace comprises a furnace body 1, wherein the furnace body 1 comprises a combustion chamber 11 and a preheating chamber 12 arranged on the outer side wall of the combustion chamber 11; A plurality of partitions 2 are arranged in the preheating chamber 12 along the vertical direction, and the plurality of partitions divide the preheating chamber 12 into a plurality of preheating channels 13; The outer side walls of several preheating channels 13 are provided with air inlets 131, and the inner side walls of several preheating channels 13 are penetrated with air outlets 132 communicating with the combustion chamber 11. The air outlets 131 are evenly distributed along the side walls of the combustion chamber 11, and the air outlets 132 on the same preheating channel 13 are higher than the air inlets 131 in the vertical direction. Air enters the preheating channel 13 from the air inlet 131 , and the air is preheated when flowing through the preheating channel 13 , and then enters the combustion chamber 11 from the air outlet 132 to participate in combustion.

[0064] The furnace body 1 in this embodiment is composed of two layers of inner and outer preheating chamber shells, which form the furnace wall. The two layers of preheating chamber shells are respectively an inner preheating chamber shell 15 and an outer preheating chamber shell 16. The space enclosed by the inner preheating chamber shell 15 is the combustion chamber 11, and the space enclosed by the outer preheating chamber shell 16 and the inner preheating chamber shell 15 is the preheating chamber 12.

[0065] A pot rack 3 is arranged on the top of the furnace body 1 for conveniently setting up pots. Support legs are arranged at the bottom of the furnace body 1, and a grate 14 is arranged at the bottom of the combustion chamber 11.

[0066] In this embodiment, the fuel participates in the combustion reaction in the combustion chamber 11, and when the air passes through the preheating chamber 12, the furnace wall is heated by the reaction heat inside the furnace body 1. Due to the induced effect of the flame airflow and the rising power of the low-density hot air, the air automatically passes through the preheating chamber 12 and absorbs the heat on the furnace wall to be heated. The high-temperature air flows out from the air outlet 132 to participate in the gasification combustion reaction. When the air enters the combustion chamber 11, it has reached or is close to the combustion temperature, thereby reducing or even eliminating the impact of low-temperature air on fuel combustion. Compared with the prior art, the combustion efficiency of the fuel can be improved; and in this application, the air is heated by using the waste heat outside the combustion chamber 11 to preheat the air, which can reduce heat waste and improve heat utilization.

[0067] In the case of no fan to assist combustion, the existing naturally aspirated firewood gasification furnace adopts air intake from the outer side of the lower part of the interlayer, and arranges the air outlet on the inner side of the furnace mouth. The air is preheated after passing through the middle part of the interlayer, and a combustion reaction occurs with the smoke at the furnace mouth. The primary combustion air for gasification is supplied from the bottom grate. This supply is blocked by the accumulation of firewood ashes and charcoal, resulting in insufficient oxygen supply for the primary air and reduced gasification degree. In order to avoid this situation, it is often adopted to add all the fuel at once and ignite from the top. Since the combustion elements are not interrupted externally, the continuity of combustion is guaranteed. Although this method can be used, it is not convenient to add new fuel. Once more new fuel is added from the top, the temperature of the combustion surface is lowered, affecting the gasification process of the gasification combustion surface, and lowering the temperature of the preheated air, which is likely to cause insufficient gasification, and the secondary combustion is terminated and thick smoke is emitted. In addition to arranging the air outlet at the furnace mouth, another part of the gasification furnace also opens several air outlets in the middle part of the interlayer to promote the gasification of fuel; however, in actual use, due to the accumulation of ashes and charcoal, the air intake power of the air outlet of the middle part of the interlayer is insufficient, so that the air entering from the outside mostly flows out from the air outlet of the furnace mouth, and less enters from the blocked air outlet of the middle part of the interlayer. As a result, the gasification effect of the gasification chamber corresponding to the air outlet of the middle part of the interlayer is not good. In addition, although the existing firewood gasification furnace can provide primary air at the grate, due to the accumulation of burning ashes and charcoal, the amount of primary air entering the grate is sharply reduced, and finally it is almost difficult to conduct to the gasification combustion surface, and the role of the grate as primary air becomes smaller.

[0068] In the present invention, the preheating channel 13 is divided into independent preheating channels 13 by a partition, so that the preheating air can be independently inlet in the vertical direction. Each section of the preheating channel 13 has an independent height difference between the inlet and outlet. Under the driving force of the rising hot air, each outlet 132 has a certain flow power. Even if the outlet 132 is blocked by ashes and charcoal, it will gradually burn, gasify and dissipate under the impact of the high-temperature air with a certain driving force. It is avoided that the preheating air is mostly directly discharged from the outlet 132 of the furnace due to the blockage of the outlet 132 by ashes and charcoal, so that the gasification stage cannot get enough oxygen, affecting the gasification combustion process. The segmented independent air intake of the preheating chamber 12 has the following four functions: (1) The gasification air power in the furnace is enhanced. (2) It prevents the outside air from entering the furnace body 1 and causing backflow and cross-flow. (3) The inner surface area of ​​the preheating chamber 12 is increased, the heat exchange surface is increased, and the preheating efficiency is improved. (4) And with the increase of partitions, it can prevent heat from spreading outward, which is beneficial to maintaining furnace temperature and reducing heat loss.

[0069] Since the air outlets 132 are widely distributed, compared with the prior art, it is not necessary to set a primary air inlet grate 14 at the bottom. The grate 14 in this embodiment is mainly set to isolate the ground, filter and collect ash. All air only needs to be provided from the air outlets 132. The air in the preheating chamber is heated immediately after ignition and gradually increases in temperature, so that the combustion reaction in the furnace is better than the primary combustion of the traditional furnace body.

[0070] Example 2: Reference Figures 1 to 36 As shown, the structure of this embodiment is similar to that of embodiment 1, except that Figure 2 As shown, the preheating channel 13 is stepped, and a plurality of partition walls 21 are arranged in the preheating channel 13 . The plurality of partition walls divide the preheating channel 13 into a plurality of small chambers wrapped in layers, and the partition walls 21 are provided with connecting holes 211 connecting adjacent small chambers.

[0071] In one embodiment, if Fig.14 As shown, a tubular gas nozzle 17 extending toward the inner wall of the combustion chamber 11 is provided at the gas outlet 132. The tubular gas nozzle 17 is exposed inside the furnace combustion chamber 11, and the reaction heat inside the combustion chamber 11 is more likely to heat the tubular gas nozzle 17. The air flows out from the tubular gas nozzle 17 and absorbs heat to be further heated. In order to prevent the gas nozzle from being blocked by charcoal or ash, or to reduce the amount of ash entering the air preheating chamber, the tubular gas nozzle 17 can be arranged to face downward or the gas outlet 132 can face downward.

[0072] In the vertical direction, the more outlets 132 are distributed, the better the gasification effect. In order to prevent the air from being preheated only by the preheating channel 13 where it is located, a partition wall 21 is set in the preheating channel 13. The partition wall divides the stepped preheating channel 13 into a plurality of small chambers, and the number of small chambers gradually increases as it approaches the combustion chamber 11, and the volume of the small chambers gradually decreases. Figure 2As shown in the figure, the inner and outer layers of the preheating channel 13 are divided by the partition wall 21. The inner and outer layers of the preheating channel 13 have a height difference in the vertical direction, forming a stepped preheating channel 13 (if the partition wall 21 divides the preheating channel 13 into multiple layers, the multiple layers of the preheating channel 13 are connected to form a stepped preheating channel 13). The inner end of the preheating channel 13 is divided into two small chambers, and the outer end of the preheating channel 13 is divided into a small chamber. The small chamber at the outer end of the preheating channel 13 forms a wrapping effect with the small chamber at the inner end of the preheating channel 13, that is, a wrapped chamber is formed. By analogy, multiple layers of small chambers can also be set outside to form a wrapped chamber. The wrapped chamber has the following functions: (1) It allows the preheated air to flow from the outer wrapped chamber to the inner small chamber, and the temperature gradient gradually increases on the flow path, and preheating is orderly. (2) Further increase the height difference of the independent air intake (increase the height difference between the air inlet 131 and the air outlet 132), and enhance the flow dynamics of the air outlet 132 of the independent air intake. (3) Due to the wrapping, the cavity shell area in the preheating channel 13 is increased, which further increases the heat exchange surface and improves the preheating efficiency. (4) The added small chamber and partition wall 21 further block the heat from spreading outward, and instead the heat conducted to the outside is brought back into the furnace by the preheated air to participate in gasification and combustion, reducing heat waste and improving heat utilization. (5) Under the premise of ensuring a large height difference between the air inlet and outlet 132 of the independent preheating channel 13, the air outlets 132 of each segment can be spaced smaller in height and distributed more, thereby further promoting gasification and combustion.

[0073] Since the air outlets 132 are widely distributed and each has a certain air flow power, there is sufficient high-temperature air to participate in the secondary combustion at the beginning and end of the combustion. Therefore, fuel can be added directly without considering whether the newly added fuel has an impact on the combustion state of the original fuel. It is convenient to add fuel, and the fire after burning will slowly turn into ashes by itself. After combustion, there will be no carbon deposits inside and outside the furnace body 1, and the inner wall of the furnace will not be blackened. When the gasification condition is good, the flame at the furnace mouth appears orange-green and blue-green, translucent, the smoke has no obvious odor, and the humidity is high. Due to the good insulation effect, firewood with high humidity can be added during the stable combustion stage, which can adapt to the complex and diverse conditions of outdoor fuels.

[0074] Example 3: Figure 3 , Figure 4As shown, the structure of this embodiment is similar to that of the embodiment 1, except that the furnace body 1 includes a plurality of stacked stacking units 4; the stacking unit 4 includes a central sleeve 41 and a guide sleeve 42 disposed on the periphery of the central sleeve 41. When the plurality of stacking units 4 are stacked together, the central sleeves 41 cooperate with each other to form a combustion chamber 11, and the adjacent guide sleeves 42 cooperate to form a preheating channel 13. The plurality of stacking units 4 are of the same size. An air outlet 132 is disposed on the central sleeve 41, and an air inlet 131 is disposed at the bottom of the guide sleeve 42.

[0075] like Figure 3 and Figure 4 As shown, the center sleeve 41 in this embodiment is circular, but it can also be set to other shapes such as triangle and polygon. The shape of the guide sleeve 42 is based on the center sleeve 41, and gradually extends outward and downward to form a step shape. At the periphery of the first step of the stepped guide sleeve 42, the diameter is reduced to form an abutment platform 421. When several stacking units 4 are stacked together, the abutment platform 421 can facilitate the stacking unit 4 above to overlap.

[0076] The guide sleeve 42 in this embodiment is arranged in a stepped shape, so that when a plurality of stacking units 4 are stacked together, adjacent guide sleeves 42 cooperate to form a stepped preheating channel 13. The stepped preheating channel 13 can not only extend the length of the preheating channel 13, so that the air can be preheated in a better and orderly manner; and the air outlet 132 and the air inlet 131 form a large height difference, which can also reduce the impact of the external airflow on the internal combustion chamber 11.

[0077] In one embodiment, after a plurality of stacking units 4 are stacked together to form a furnace body 1, a plurality of furnace sleeves 43 are arranged on the outer surface of the furnace body 1, and the plurality of furnace sleeves 43 are stacked on the outer sides of the plurality of stacking units 4. The pot rack 3 is arranged on the top of the furnace sleeve 43. An outer channel is formed between the furnace sleeve 43 and the outer side wall of the furnace body 1, and a base 44 is arranged at the bottom of the lowest furnace sleeve 43, and a main air door 5 is arranged on the side wall of the base 44. By adjusting the size of the main air door 5, the size of the overall air intake in the furnace body 1 can be adjusted. The outside air first enters the outer channel, and then enters the combustion chamber 11 from the preheating channel 13.

[0078] An ash hopper 441 is provided at the center of the base 44, and a grate 14 matching the ash hopper is sleeved on the ash hopper. Ashes in the combustion chamber 11 fall from the grate 14 and fall into the ash hopper.

[0079] The structure of the main air door 5 includes: a first inlet 51 arranged on the side wall of the furnace jacket 43, an air ring 52 arranged on the inner side of the furnace jacket 43, a plurality of second inlets 53 matched with the first inlet 51 are arranged on the air ring 52, the air ring 52 is rotatably arranged on the inner side wall of the furnace jacket 43, and the air ring 52 is connected to an adjustment rod 54, which passes through the furnace jacket 43 and is arranged on the outer side of the furnace jacket 43. The adjustment rod 54 is rotated to adjust the size of the overlapping area of ​​the first inlet 51 and the second inlet 53, thereby adjusting the air intake of the main air door 5.

[0080] The specific number of the furnace jackets 43 matches the number of the stacking units 4 , so that the furnace jackets 43 can be completely sleeved on the periphery of the furnace body 1 .

[0081] In this embodiment, the furnace body 1 is configured to be composed of a plurality of stacking units 4, so that when in use, a suitable number of stacking units 4 can be selected according to actual needs, and the method of use is flexible. The furnace jacket 43 is installed, and the total air door 5 can be controlled after startup to adjust the air intake of the gasification combustion, and the size of the air intake is controlled in the gasification combustion stage and the gas combustion stage. According to the humidity of the fuel, the total air door 5 is adjusted, and the air supply is increased when the humidity is high to speed up the combustion reaction, and the air supply is reduced when the humidity is low to slow down the combustion reaction and avoid the outflow of flue gas that has no time to react due to the violent reaction.

[0082] Example 4: Figures 5 to 11 As shown, the structure of this embodiment is similar to that of embodiment 3, except that the stacking unit 4 includes a plurality of unit plates 46 connected along a circumferential direction, and the unit plates 46 include a center plate 461 and a guide plate 462; when a plurality of center plates 461 are combined into a stacking unit 4, the center plates 461 are connected to form a center sleeve 41, and the guide plates 462 are connected to form a guide sleeve 42.

[0083] The stacking unit 4 in this embodiment is composed of four unit plates 46, so the shape of the stacking unit 4 is a quadrilateral. Of course, the stacking unit 4 can also be composed of unit plates 46 of other numbers.

[0084] When the unit plates 46 are combined to form a stacking unit 4, they can be connected together by bolts and pins. In this embodiment, for the convenience of connection, a first upper slot 463 and a first lower slot 464 are respectively provided on both sides above each unit plate 46, and a second upper slot 465 and a second lower slot 466 are respectively provided on both sides below each unit plate 46; the first upper slot 463 on adjacent stacking units 4 is matched with the first lower slot 464, and the adjacent second upper slot 465 is matched with the second lower slot 466, so as to be combined into a stacking unit 4 as a whole.

[0085] In this embodiment, the stacking unit 4 can be further disassembled into the unit plate 46, so that the whole furnace body 1 can be disassembled into the unit plate 46 structure, and the disassembled unit plate 46 can be stored in the cooker, so that the overall volume is reduced and convenient to carry. When in use, the unit plate 46 is first assembled into the stacking unit 4, and then the stacking unit 4 is assembled into the furnace body 1.

[0086] In addition, each unit plate 46 in this embodiment has the same structure and can be processed from the same standard profile during the production process, which simplifies the production process; due to the standard size, the height of the furnace body 1 can be freely stacked after adding the stacking unit 4.

[0087] A grate 14 is provided at the bottom to isolate the ground and ensure sufficient primary air during the ignition stage. The grate 14 is used as an upper cover when stored. When the fuel fills the lower part, the secondary air is well preheated in the air preheating chamber. The high-temperature air impacts the fuel, causing it to dry distill and gasify. It encounters external air at the pot rack 3 to cause a combustion reaction and heat the pot.

[0088] In addition, if Fig.10 As shown, the pot rack 3 in this embodiment is formed by a plurality of pot rack plates 31 that are mutually clamped, and the pot rack 3 in this embodiment is composed of four pot rack plates 31. When stored, the pot rack 3 can also be stored in the pot like the unit plate 46. It should be noted that two pot rack grooves 32 are provided below the pot rack plate 31, so that after the pot rack 3 is assembled, the two pot rack grooves 32 are respectively matched with the two center plates 461 and are provided on the top of the furnace body 1.

[0089] Example 5: Fig.12 , Fig.13 As shown, the structure of this embodiment is similar to that of Embodiment 3, except that the volume of the plurality of stacking units 4 gradually decreases from bottom to top; when folding, the upper stacking unit 4 can be folded into the lower stacking unit 4.

[0090] After the stacking units 4 in this embodiment are assembled into the furnace body 1, the overall shape of the furnace body 1 is a pyramid or truncated cone that gradually shrinks from bottom to top, so that when the stacking units 4 are disassembled, the upper stacking units 4 can be stored in the lower stacking units 4 in turn, thereby reducing the volume after storage.

[0091] For the convenience of storage, a larger pot can be provided in this embodiment, and the stacking unit 4 can be stored and placed in the pot. The pot rack 3, pot clip, soup pot and other kitchen utensils can also be packed together and placed in the pot.

[0092] Example 6: Fig.14 and Fig.15As shown, the structure of this embodiment is similar to that of Embodiment 3, except that the center sleeve 41 and the guide sleeve 42 of this embodiment are similar in structure and shape. The center sleeve 41 and the guide sleeve 42 of this embodiment are truncated cone-shaped, and the preheating chamber 12 is formed between the center sleeve 41 and the guide sleeve 42. The outer wall of the center sleeve 41 is provided with a preheating channel 13. When in use, a furnace body 1 can be assembled from a plurality of stacking units 4, or a single stacking unit 4 can also be provided as the furnace body 1. The furnace body 1 in this embodiment is composed of two stacking units 4. A total air door 5 is provided below each stacking unit 4. The total air door 5 can control the amount of air intake.

[0093] When storing, the upper stacking unit 4 can be stored in the lower stacking unit 4, thereby saving the volume after storage. And when in use, the stacking unit 4 can be directly assembled.

[0094] In addition, since each stacking unit 4 is provided with a main air door 5, the amount of air entering the combustion chamber 11 can be adjusted by adjusting the sizes of different main air doors 5 respectively.

[0095] In this embodiment, a large pot can also be provided, and the stacking unit 4, the pot rack 3, and tableware such as bowls can be placed in the pot.

[0096] Example 7: Figures 16 to 19 As shown, the structure of this embodiment is similar to that of Embodiment 1, except that the furnace body 1 includes a plurality of mutually slidably connected kit units 6, the kit units 6 include an inner sleeve 61 and an outer sleeve 62, and the inner sleeve 61 and the outer sleeve 62 are connected by a partition sleeve 63; when contracted, the plurality of kit units 6 are nested and contracted to reduce their volume; when extended, the support assembly 7 enables the plurality of kit units 6 to maintain an extended state, the plurality of inner sleeves 61 cooperate to form a combustion chamber 11, and adjacent partition sleeves 63 cooperate to form a preheating channel 13, and in the extended state, the partition sleeve 63 and the partition baffle 2 both divide the combustion chamber 11 into a plurality of preheating channels 13.

[0097] Specifically, as shown in the figure, the inner sleeve 61, the outer sleeve 62 and the partition sleeve 63 in this embodiment directly cooperate to form a structure with a "Z"-shaped cross section. An upper retaining ring 621 is provided on the upper edge of the outer side of the outer sleeve 62, and the cross section of the upper retaining ring 621 is L-shaped. The upper retaining ring 621 in this embodiment is installed on the upper edge of the outer side of the outer sleeve 62 by screws.

[0098] A lower retaining ring 622 protruding outward is provided at the lower edge of the outer side of the outer sleeve 62, and the lower retaining ring 622 slides inside the adjacent outer sleeve 62. The inner sleeve 61 is slidably provided inside the inner sleeve 61 of the adjacent sleeve unit 6.

[0099] like Fig.16As shown, the support assembly 7 in this embodiment includes an external thread 71 arranged on the outer side of the lower retaining ring 622 , and an internal thread 72 arranged on the inner side of the upper end of the outer sliding sleeve 62 .

[0100] For the convenience of description, the topmost kit unit 6 to the bottommost kit unit 6 are listed as the first layer, the second layer to the last layer in sequence. When the kit unit 6 needs to be unfolded, the first layer of kit unit 6 is pulled to make several kit units 6 unfold into the shape of the furnace body 1, and then the first layer of kit unit 6 is rotated, and the external thread 71 on the first layer of kit unit 6 cooperates with the internal thread 72 of the second layer of kit unit 6, so that the first layer of kit unit 6 and the second layer of kit unit 6 are fixed together. When the internal thread 72 and the external thread 71 are fully matched, the upper retaining ring 621 abuts against the lower retaining ring 622, and the second layer of kit unit 6 can continue to rotate, so that the external thread 71 of the second layer of kit unit 6 cooperates with the internal thread 72 of the third layer of kit unit 6, and the above process is repeated, so that several kit units 6 can be fixed into the furnace body 1.

[0101] On the contrary, when the unfolded kit unit 6 needs to be collapsed, it is only necessary to rotate the first layer, the second layer, etc. kit units 6 in the opposite direction in sequence so that the adjacent internal threads 72 and external threads 71 ​​are separated, and the multiple layers of kit units 6 can be stored.

[0102] An ash hopper and a grate 14 are arranged in the lowermost kit unit 6, and a side hole is arranged on the side wall of the ash hopper to facilitate pouring out the ashes in the ash hopper.

[0103] In addition, in order to facilitate the lifting of the first layer kit unit 6, a furnace rack is provided on the first layer kit unit 6, and an annular handle 33 is provided in the circumferential direction of the furnace rack to facilitate the lifting and rotation of the first kit unit 6.

[0104] Compared with Embodiments 3 to 6, the unfolding and storage process in this embodiment is more convenient. There is no need to assemble the structure of each layer. The furnace body 1 can be unfolded by only pulling the uppermost kit unit 6 when in use.

[0105] Example 8: Reference Figures 18 to 22 As shown, the structure of this embodiment is similar to that of embodiment 7, except that the support assembly 7 in this embodiment includes a plurality of support sleeves 73 slidably connected to each other; the plurality of support sleeves 73 are sleeved on the outside of a plurality of kit units 6.

[0106] The lowermost support sleeve 73 is fixedly connected to the bottom kit unit 6, and the uppermost support sleeve 73 is fixedly connected to the top kit unit 6; When extended, the adjacent support sleeves 73 are kept in the extended state by the locking member, and the kit unit 6 is in the extended state; When shrinking, the locking member is released, and the plurality of support sleeves 73 and the plurality of kit units 6 shrink, and the volume is reduced.

[0107] The locking member in this embodiment is a mutually matching thread, and the two support sleeves 73 are connected by threads. Of course, the locking member can be a pin or a spring pin or other structures, and the adjacent support sleeves 73 can be connected by pins or other means. In this embodiment, two support sleeves 73 are provided, and of course, different numbers of support sleeves 73 can be provided according to actual conditions. A main air door 5 is provided on the side wall of the lower support sleeve 73, and the structure of the main air door 5 is the same as that of the main air door 5 in Example 3.

[0108] A supporting internal thread 731 is provided on the inner side of the upper end of the lower supporting sleeve 73, and a supporting external thread 732 is provided on the outer side of the lower end of the upper supporting sleeve 73. A supporting retaining ring 733 is provided at the opening of the lower end of the upper supporting sleeve 73, and the supporting retaining ring 733 is fixed to the outer periphery of the opening of the lower end of the supporting sleeve 73 by means of threads.

[0109] The working principle of this embodiment is as follows: when it is necessary to unfold several layers of the suite units 6, pull the uppermost support sleeve 73 so that the upper support sleeve 73 slides in the lower support sleeve 73. Since the upper support sleeve 73 is fixedly connected to the top suite unit 6, the upper support sleeve 73 can drive the top suite unit 6 to move upward, so that several layers of the suite units 6 are unfolded.

[0110] The upper support sleeve 73 is rotated so that the support inner thread 731 and the support outer thread 732 cooperate with each other, thereby fixing the upper support sleeve 73 and the lower support sleeve 73, and the several layers of the kit units 6 are also unfolded. Therefore, compared with the embodiment 7, the present embodiment only needs to rotate the threads between the support sleeves 73 to unfold the several layers of the kit units 6, without rotating each layer of the kit units 6, so that the unfolding of the several kit units 6 can be more convenient and quick.

[0111] Similarly, when it is necessary to store several layers of the kit units 6, the upper support sleeve 73 can be rotated in the opposite direction so that the adjacent support sleeves 73 are separated, so that the storage of several layers of the kit units 6 can be achieved.

[0112] Example 9: Reference Figure 23 to Figure 24 As shown, the structure of this embodiment is similar to that of the embodiment 8, except that the inner sleeve 61, the outer sleeve 62 and the partition sleeve 63 in this embodiment directly cooperate to form a structure with a "U"-shaped cross section. A lower retaining ring 622 is provided at the lower edge of the inner side of the outer sleeve 62, and the cross section of the lower retaining ring 622 is L-shaped. The lower retaining ring 622 in this embodiment is installed on the upper edge of the outer side of the outer sleeve 62 by screws.

[0113] An upper retaining ring 621 protruding outward is provided on the upper edge of the outer side of the outer sleeve 62, and the upper retaining ring 621 is slidably disposed on the inner side of the adjacent outer sleeve 62. The inner sleeve 61 is slidably disposed on the inner side of the adjacent inner sleeve 61 of the sleeve unit 6.

[0114] The storage method in this embodiment is slightly different from the structure in Embodiment 8, the difference being that in Embodiment 8, the upper kit unit 6 is stored in the lower kit unit 6. In this embodiment, the lower kit unit 6 is stored in the upper kit unit 6, and the order of storage is opposite to that in Embodiment 8.

[0115] Example 10: Reference Figure 25 to Figure 27 As shown, the structure of this embodiment is similar to that of the embodiment 7, except that the support assembly 7 can include a plurality of telescopic rods 74 arranged in the circumferential direction of the outer side of the furnace body 1, and the two ends of the telescopic rods 74 are respectively connected to the topmost suite unit 6 and the bottommost suite unit 6. In this embodiment, three telescopic rods 74 are arranged, and the three telescopic rods 74 are evenly distributed on the outer side of the furnace body, and the angle between the two is 120 degrees.

[0116] In this embodiment, by pulling the topmost kit unit 6, the telescopic rod 74 is lengthened, so that several kit units 6 are stretched out, and then the telescopic rod 74 is fixed (cannot be stretched or retracted), so that the kit units 6 can be stretched out.

[0117] Similarly, when it is necessary to store several kit units 6, the telescopic rod 74 can be shortened to collapse several layers of kit units 6.

[0118] The telescopic rod 74 in this embodiment includes a plurality of sleeves 741, adjacent sleeves 741 are slidably connected to each other, and adjacent sleeves 741 are positioned and fixed by positioning pins 742. Positioning springs 743 are provided in the sleeves 741 to push the positioning pins 742 to move outward. Therefore, when retracting, the telescopic rod 74 can be shortened by simply pressing the positioning pins 742 toward the inside of the sleeves 741.

[0119] In one embodiment, a switch cover 75 is provided on the outer side wall of a plurality of telescopic rods 74, and a switch hole 751 is provided on the switch cover 75, and the switch cover 75 slides along the telescopic rod 74. A switch blocking piece 752 is provided on the inner side of the switch cover 75, and the switch blocking piece 752 is a structure protruding in the middle, and an abutting spring 753 is provided in the switch cover 75 to push the switch blocking piece 752 to move toward the switch hole 751.

[0120] The switch sleeves 75 on the telescopic rods 74 are connected to form a ring structure through the arc rod 754. When in use, the arc rod 754 is pulled to make the switch sleeves 75 move upward or downward along the telescopic rod 74 at the same time, and when the switch blocking piece 752 passes the positioning pin 742, the positioning pin 742 can be pushed into the sleeve 741, so that the telescopic rod 74 is unlocked and the telescopic rod 74 can be retracted.

[0121] Therefore, by providing the switch sleeve 75 and the arc rod 754, the extension and contraction of the telescopic rod 74 can be facilitated, and it can also be more convenient to use.

[0122] Example 11: Reference Figures 28 to 30 As shown, the structure of this embodiment is similar to that of embodiment 7, except that the method of fixing adjacent kit units 6 by means of internal threads 72 and external threads 71 ​​in embodiment 7 is omitted in this embodiment. Specifically, the support assembly 7 in this embodiment includes a plurality of support flaps 76 and support edge plates 77 arranged on the outer sleeve 62; the support flaps are rotatably arranged on the outer sleeve 62 through the hinge shaft 761, and the support edge plates 77 slide in the adjacent outer sleeves 62; When extended, a plurality of the kit units 6 are in an upright state, the support flap 76 is kept in a supported state by gravity, and the support edge plate 77 is supported on the adjacent kit units 6; During contraction, a number of the kit units 6 are inverted, and the support flap 76 rotates under the action of gravity to maintain the contracted state, and the support edge plate 77 can slide along the outer sliding sleeve 62.

[0123] Specifically, as shown in the figure, the inner sleeve 61, the outer sleeve 62 and the separation sleeve in this embodiment directly cooperate to form a structure with a "Z"-shaped cross section. An upper retaining ring 621 is provided on the upper edge of the outer side of the outer sleeve 62, and the cross section of the upper retaining ring 621 is L-shaped. The upper retaining ring 621 in this embodiment is installed on the upper edge of the outer side of the outer sleeve 62 by screws.

[0124] The lower edge of the outer side of the outer sleeve 62 is provided with a support plate 77 protruding outward, and the support plate 77 is slidably arranged on the inner side of the adjacent outer sleeve 62. The inner sleeve 61 is slidably arranged on the inner side of the adjacent inner sleeve 61 of the kit unit 6.

[0125] As shown in the figure, the support flap 76 in this embodiment is rotatably arranged above the outer side wall of the outer sleeve 62, and the support flap 76 is limited and extended, so that the center of gravity of the support flap 76 is unstable and will change with the change of the placement posture.

[0126] The working principle of this embodiment is as follows: Fig.28As shown, this state is in the extended state, at this time, the support flap 76 is kept horizontal under the action of gravity, and the support edge plate 77 is supported on the support flap 76. It should be noted that at this time, the support edge plate 77 is acted on the support flap 76 by gravity, and a certain turning gap 78 is left between the upper retaining ring 621 and the support edge plate 77. When it is necessary to shrink, the whole body is turned upside down, at this time, the support edge plate 77 is abutted against the upper retaining ring 621 by gravity, and the support flap 76 is turned over by gravity and kept in a vertical state, and then the hand is released, and the support edge plate 77 can slide on the adjacent outer sliding sleeve 62, so that several suite units 6 are shrunk together. Similarly, several suite units 6 can be unfolded by the opposite method mentioned above.

[0127] In this embodiment, the principle that the support flap 76 presents different postures due to the action of gravity is cleverly used, so that the kit unit 6 can be expanded or retracted more quickly.

[0128] Example 12: Reference Figure 31 to Figure 36 As shown, the structure of this embodiment is similar to that of the embodiment 1, except that the furnace body 1 is surrounded by a plurality of mutually hinged side wall plates 8; the side wall plates 8 include a side wall inner plate 81 and a side wall outer plate 82, the side wall inner plate 81 and the side wall outer plate 82 cooperate to form a preheating chamber 12, and a plurality of side wall inner plates 81 surround a combustion chamber 11. A plurality of small chambers are arranged in the combustion chamber 11. A main air door 5 is arranged below each side wall plate 8, and the structure of the main air door 5 in this embodiment is similar to that of the embodiment 3, except that the air ring 52 in this embodiment is a straight plate structure.

[0129] In one embodiment, referring to Figure 31 to Figure 33 As shown, there are four side wall panels 8, which are hinged to each other to form a square prism. A foldable grate 14 is provided on the inner side of the side wall panel 8.

[0130] In one embodiment, referring to Figure 34 to Figure 36 As shown, the side wall plate 8 is in a long strip shape, and the furnace body 1 is composed of 16 side wall plates 8.

[0131] In this embodiment, the furnace body 1 is surrounded by a plurality of side wall plates 8 to form a scroll style, which is convenient for storage and carrying. In addition, during the production process, it can be made into a large furnace and a small furnace according to actual needs, forming a scroll style, and finally configured with a buckle to make a large furnace.

[0132] 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 wood-fired gasifier, characterized in that: The furnace body comprises a combustion chamber and a preheating chamber arranged outside the combustion chamber; A plurality of partitions are arranged in the preheating chamber along the vertical direction, and the plurality of partitions divide the preheating chamber into a plurality of preheating channels; The outer side walls of the plurality of preheating channels are provided with air inlets, and the inner side walls of the plurality of preheating channels are provided with air outlets communicating with the combustion chamber, wherein the air outlets are higher than the air inlets in the vertical direction; Air enters the preheating channel from the air inlet, is preheated when passing through the preheating channel, and then enters the combustion chamber from the air outlet to participate in combustion.

2. The wood-fired gasifier according to claim 1, characterized in that: The preheating channel is stepped, and a plurality of partition walls are arranged in the preheating channel. The plurality of partition walls divide the preheating channel into a plurality of small chambers wrapped in layers, and connecting holes for connecting adjacent small chambers are arranged on the partition walls.

3. The wood-fired gasifier according to claim 1 or 2, characterized in that: The furnace body includes a plurality of stacked units; the stacked units include a central sleeve and a guide sleeve arranged outside the central sleeve. When the plurality of stacked units are stacked together, the central sleeves cooperate with each other to form a combustion chamber, and adjacent guide sleeves cooperate with each other to form a preheating channel.

4. The wood-fired gasifier according to claim 3, characterized in that: Several stacked units are of the same size.

5. The wood-fired gasifier according to claim 4, characterized in that: The stacking unit includes a plurality of unit plates connected along the circumferential direction, and the unit plates include a center plate and a guide plate; when a plurality of center plates are combined into a stacking unit, the center plates are connected to form a center sleeve, and the guide plates are connected to form a guide sleeve.

6. The wood-fired gasifier according to claim 3, characterized in that: The volumes of the stacking units gradually decrease from bottom to top; when folded, the upper stacking unit can be folded into the lower stacking unit.

7. The wood-fired gasifier according to claim 1 or 2, characterized in that: The furnace body includes a plurality of mutually slidably connected suite units, the suite units include an inner sleeve and an outer sleeve, and the inner sleeve and the outer sleeve are connected by a partition sleeve plate; when contracted, the plurality of suite units are nested and contracted to reduce their volume; when extended, the supporting assembly enables the plurality of suite units to remain in an extended state, the plurality of inner sleeves cooperate to form a combustion chamber, and adjacent partition sleeve plates cooperate to form a preheating channel.

8. The wood-fired gasifier according to claim 7, characterized in that: The support assembly includes a plurality of support sleeves slidably connected to each other; the plurality of support sleeves are arranged outside the plurality of kit units; The lowermost support sleeve is fixedly connected to the lower set unit, and the uppermost support sleeve is fixedly connected to the upper set unit; When extended, the adjacent support sleeves are kept in an extended state by the locking pieces, and the kit unit is in an extended state; During contraction, the locking piece is released, and a plurality of support sleeves and a plurality of kit units are contracted, and the volume is reduced.

9. The wood-fired gasifier according to claim 7, characterized in that: The support assembly includes a plurality of support flaps and support edge plates arranged on the outer sliding sleeve; the support flaps are rotatably arranged on the outer sliding sleeve, and the support edge plates slide in the adjacent outer sliding sleeve; When extended, several kit units are in an upright state, the support flaps are kept in a supported state by gravity, and the support edges of adjacent kits are supported on the support flaps; When the device is retracted, several kit units are inverted, and the supporting flap is rotated by gravity to maintain the retracted state, and the supporting edge plate can slide along the outer sliding sleeve.

10. The wood-fired gasifier according to claim 1 or 2, characterized in that: The furnace body is surrounded by a plurality of mutually hinged side wall plates; the side wall plates include a side wall inner plate and a side wall outer plate, the side wall inner plate and the side wall outer plate cooperate to form a preheating chamber, and a plurality of side wall inner plates surround a combustion chamber.

Images