Carbonization apparatus

Abstract

To obtain a carbonization device that is easy to transport and assemble, and capable of carbonizing various types of agricultural waste. [Solution] The carbonization apparatus 1 of the present invention includes a furnace 2 and a stand 3 that supports the furnace 2. The furnace 2 includes at least two wall portions 21 having a length and a lid portion 22 provided on each of the longitudinal ends of the wall portions 21, and the at least two wall portions 21 are directly or indirectly connected along one of their long sides. The wall portion 21 of the furnace 2 is fixed to the base 3 such that each short side of the wall portion 21 and the contact surface of the carbonization device 1 form an acute angle.

Description

Technical Field

[0001] The present invention relates to a carbonization apparatus.

Background Art

[0002] Generally, charcoal used for applications such as soil improvement is obtained by pulverizing imported charcoal within the country for use. On the other hand, in recent years, from the viewpoint of addressing environmental issues, it has been desired to effectively utilize agricultural waste such as thinned wood and rice husk. As one of the measures to effectively utilize such agricultural waste, carbonizing the agricultural waste to use it for soil improvement and the like has been studied.

[0003] Various studies have been progressed for carbonizing and effectively utilizing agricultural waste as described above. For example, Patent Document 1 discloses an invention of a carbonization apparatus characterized in that a rotatable shaft is disposed in a carbonization chamber for carbonizing a raw material, a plurality of paddles for stirring the raw material in the carbonization chamber and transferring the raw material toward an outlet are attached to the shaft, and air supply ports for feeding air to ignited raw material to cause incomplete combustion are provided at positions corresponding to between the paddles at the lower part or the bottom of the carbonization chamber. Patent Document 1 discloses that with the above configuration, the carbonization apparatus can provide the effect of providing a compact and simple-structured carbonization apparatus capable of continuously carbonizing rice husk and the like.

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] Although the carbonization apparatus described in Patent Document 1 has the effect of being able to continuously carbonize rice husks, it had the following problems. That is, because the structure of the carbonization apparatus is relatively complex, once it is installed, it is generally operated in the location where it is installed, and the apparatus itself is not moved. On the other hand, agricultural waste such as thinned wood and rice husks is generated in various places such as mountainous areas and cultivated fields, and the places where charcoal is used for soil improvement are generally mainly the places where the agricultural waste is generated.

[0006] In the case of carbonizing agricultural waste using the carbonization apparatus described in Patent Document 1, the agricultural waste must be transported from the place where it was generated to the location where the carbonization apparatus is installed, and the charred charred by the carbonization apparatus must be transported back to the place where the agricultural waste was generated. However, fuel is naturally required to operate the means of transport when transporting agricultural waste and charred. In order to further reduce the environmental burden, it is preferable to carbonize the agricultural waste at the place where it was generated, but the carbonization apparatus described in Patent Document 1 is relatively difficult to move and use on site. Furthermore, it is desirable that a single carbonization apparatus be able to carbonize agricultural waste of different types and sizes. However, the agricultural waste that can be carbonized by the carbonization apparatus described in Patent Document 1 is limited to relatively small-sized agricultural waste such as rice husks, making it relatively difficult to carbonize relatively large-sized agricultural waste such as thinned timber. Therefore, there was a need for a carbonization apparatus that is easy to carry and assemble, and that can carbonize various types of agricultural waste. [Means for solving the problem]

[0007] As a result of diligent research by the inventors, it was discovered that the above-mentioned problems can be solved by a carbonization apparatus with a specific structure, leading to the present invention. In other words, the present invention is [1] A carbonization apparatus including a furnace and a stand for supporting the furnace, The furnace includes at least two wall sections, each containing a plate having a certain length, and a lid provided at each of the longitudinal ends of the wall sections, wherein the at least two wall sections are directly or indirectly connected along one of their long sides. The wall portion of the furnace is fixed to the base such that each short side of the wall portion and the contact surface of the carbonization apparatus form an acute angle. A carbonization apparatus characterized by the following: [2] The carbonization apparatus according to [1], wherein the base includes at least two columnar sections and at least one beam section that spans the upper part of the columnar sections, and is provided at at least one end in the longitudinal direction of the wall section. [3] The carbonization apparatus described in [1], wherein an air supply mechanism is provided in the furnace on the lower side of the wall portion. [4] Furthermore, the carbonization apparatus according to [1] includes a stirring section in the furnace that includes a rotating shaft and one or more blades protruding from the rotating shaft, [5] The carbonization apparatus according to [4], wherein at least a portion of the blades of the stirring section are helical blades along the axis of rotation, and [6] Furthermore, the carbonization apparatus according to [1] includes a container section having at least an open top and a hopper section including a discharge port for discharging the contents from the container section into the furnace, Regarding. [Effects of the Invention]

[0008] Because the carbonization apparatus of the present invention has a relatively simple structure, it can be brought to the site where agricultural waste is generated and assembled on-site, allowing for carbonization of agricultural waste and other materials at the site of generation without having to move them. Furthermore, by using the carbonization apparatus of the present invention, not only small materials such as rice husks but also relatively large agricultural waste such as thinned timber can be carbonized separately or simultaneously. [Brief explanation of the drawing]

[0009] [Figure 1] (A) is a perspective view, (B) is a side view, (C) is a top view, and (D) is a bottom view showing one embodiment of the carbonization apparatus of the present invention. [Figure 2] These are (A) a front view, (B) a top view, and (C) a side view of the wall section. [Figure 3] Figure 1 shows a different embodiment of the carbonization apparatus of the present invention, with (A) an oblique view, (B) a side view, (C) a top view, and (D) a bottom view. [Figure 4] These are (A) a front view, (B) a left side view, and (C) a right side view of the air supply mechanism. [Figure 5] This is a perspective view showing yet another configuration of carbonization equipment. [Figure 6] (A) Front view of the stirring section, (B) Side view of (A), (C) Front view of a different stirring section from (A), (D) Left side view of (C), and (E) Right side view of (C). [Figure 7] This is a perspective view showing yet another configuration of carbonization equipment. [Figure 8] (A) Perspective view of the hopper section, (B) Cross-sectional view of AB in (A), and (C) Cross-sectional view of CD in Figure 7(B). [Modes for carrying out the invention]

[0010] Preferred embodiments of the present invention will be described with reference to the drawings. It goes without saying that the present invention is not limited to the following embodiments and aspects, and various modifications are possible within the technical scope of the present invention. Furthermore, "up and down," "front and back," and "left and right" in this text refer to the directions shown in each drawing.

[0011] As described above, the present invention relates to a carbonization apparatus 1 including a furnace 2 and a stand 3 supporting the furnace 2, The furnace 2 includes at least two wall portions 21 having a length and a lid portion 22 provided on each of the longitudinal ends of the wall portions 21, and the at least two wall portions 21 are directly or indirectly connected along one of their long sides. The present invention relates to a carbonization apparatus 1 in which the wall portion 21 of the furnace 2 is fixed to the base 3 such that each short side of the wall portion 21 and the contact surface of the carbonization apparatus 1 form an acute angle. The carbonization apparatus 1 of the present invention will be described below for each component.

[0012] 1. Furnace 2 The furnace 2 is a member used for carbonizing a carbonization target of agricultural waste (hereinafter simply referred to as "carbonization target"). As described above, the furnace 2 includes at least two wall surface portions 21 each including a plate having a length, and lid portions 22 provided on respective longitudinal end sides of the wall surface portions 21. The wall surface portion 21 only needs to be a plate-shaped member having a length as described above, and can be appropriately adjusted on the condition that it has a size and a shape enough to carbonize the target carbonization object. When the wall surface portion 21 is viewed from a planar direction, the shape may be, for example, a polygonal shape such as a triangle, a quadrangle, a pentagon, or a hexagon having a longitudinal direction, or a circular shape including an ellipse. The shape of the wall surface portion 21 in Fig. 1 as viewed from the planar direction is a rectangle.

[0013] In the carbonization apparatus 1 of the present invention, at least two of the wall surface portions 21 are provided, and the at least two wall surface portions 21 are directly or indirectly connected at one long side thereof. The expression "directly or indirectly connected" means that one long side of at least two wall surface portions 21 may be directly connected so as to form a V-shape when viewed from the longitudinal end side thereof, or may be indirectly connected via a planar bottom portion 23 as shown in Fig. 1.

[0014] Lid portions 22 and 22 are provided on respective longitudinal end sides of the wall surface portions 21 to close a space obtained by connecting the wall surface portions 21 and 21 from the end side. The shape and size of the lid portions 22 and 22 are not particularly limited, provided that the shape and size are such that the space obtained by the wall surface portions 21 can be closed at the longitudinal end. For example, in Fig. 1, the longitudinal end forms a substantially V-shape by the wall surface portions 21, 21 and the bottom portion 23, and the lid portions 22, 22 are the substantially V-shaped lids. However, as described above, the lid portion 22 only needs to have a shape and size that can close the space formed by the wall surface portions 21 at the end thereof, and for example, the planar shape thereof may be a polygon such as a triangle, a quadrangle, a pentagon, or a hexagon, or may be a circle including an ellipse.

[0015] The cover portion 22 may be directly connected to the end of the wall surface portion 21, or may be connected to a pillar portion 31 and / or a beam portion 32 described later so as to cover the end of the wall surface portion 21 when the carbonization device 1 is assembled.

[0016] Further, the wall surface portion 21 may include a blade portion 24 for more easily fixing the furnace 2 and a platform 3 described later. A specific embodiment of the wall surface portion 21 including the blade portion 24 is shown in FIG. 2. In the example of FIG. 2, the blade portions 24, which are projections along the short sides, are provided on both end sides of the long sides of the wall surface portion 21. By providing such a blade portion 24, for example, when fixing the wall surface portion 21 to the pillar portion 31 and / or the beam portion 32 by screw fastening, screw holes are preliminarily formed in the blade portion 24 and the pillar portion 31 and / or the beam portion 32, whereby the furnace 2 can be more easily fixed to the platform 3 by screw fastening.

[0017] The materials of the wall surface portion 21, the cover portion 22, and the bottom portion 23 can be appropriately selected on the condition that they can withstand the heat generated during carbonization and the mass of the carbonization target. Examples of such materials include metal materials such as iron, steel, and aluminum, glass materials such as heat-resistant glass, and resin materials such as heat-resistant resin. Further, when connecting the wall surface portions 21 to each other, when connecting the wall surface portion 21 and the bottom portion 23 in the case where the bottom portion 23 is provided, and when directly connecting the cover portion 22 to the wall surface portion 21, by connecting each member using screws such as bolts, each member can be transported more easily in a disassembled state, and the assembly of the furnace 2 at the site where the carbonization device 1 is used can be performed more easily.

[0018] 2. Platform 3 The platform 3 is a member for supporting the furnace 2. The material, size, and shape of the platform 3 are not particularly limited, provided that the platform 3 can support the furnace 2. As shown in FIG. 1, the platform may be connected to and support both ends of the furnace 2 in the length direction, or may be a columnar or triangular platform provided in the middle of the wall surface portion 21 to support the wall surface portion 21 at a specific angle.

[0019] As a specific example of the base 3, a base 3 including at least two column sections 31 and at least one beam section 32 spanning the upper part of the column sections 31 can be mentioned, as shown in Figure 1. The column sections 31 and beam section 32 can be combined to form a base structure, and their shape and size can be adjusted as appropriate, provided that they can withstand the mass of the furnace 2 supported by the base 3. For example, the column sections 31 and beam section 32 may be rod-shaped members or pipe-shaped hollow members with cross-sectional shapes such as triangles, squares, pentagons or hexagons, circles including ellipses, L-shaped, U-shaped or square-shaped members. In Figure 1, the column sections 31 and beam section 32 are rod-shaped members with an L-shaped cross-section. The material of the column sections 31 and beam section 32 can be appropriately selected, provided that it can support the furnace 2 and withstand the heat during carbonization. Examples of such materials include metal materials such as iron, steel, and aluminum, glass materials such as heat-resistant glass, and resin materials such as heat-resistant resin.

[0020] The base 3 is assembled by combining the column section 31 and beam section 32 as described above. The column section 31 and beam section 32 may be connected to each other by, for example, screw fastening using bolts, bonding using adhesive, or welding if metal materials are used. The base 3 includes at least two column sections 31 and at least one beam section 32 that spans the upper part of the column sections 31. However, the number of column sections 31 and beam sections 32 may be increased to make the structure of the base 3 stronger. For example, in the example shown in Figure 1, the beam section 32 spans not only the upper part but also the lower part of the two column sections 31. By providing the beam section 32 not only on the upper part but also on the lower part of the column sections 31 in this way, the strength of the base 3 can be further increased.

[0021] 3. Example of the form of carbonization apparatus 1 As described above, in the carbonization apparatus 1 of the present invention, the wall portion 21 of the furnace 2 is fixed to the base 3 such that each short side of the wall portion 21 and the contact surface of the carbonization apparatus 1 form an acute angle. A specific example of the carbonization apparatus 1 of the present invention is shown in Figure 1. In the carbonization apparatus 1 of Figure 1, the two wall portions 21 of the furnace 2 are connected via the bottom portion 23. In Figure 1(B), the contact surface when the carbonization apparatus 1 is installed on a horizontal plane is represented by the dotted line α, and the direction of the short sides of the two wall portions 21 is represented by the dotted line β. The furnace 2 is fixed to the base 3 such that the angles θ1 and θ2 of the dotted line α and the two dotted lines β are acute angles. Specifically, it is preferable that the angles θ1 and θ2 are independently 55 to 65°, and more preferably that both θ1 and θ2 are 60°. By setting the installation angle of the wall portion 21 to an acute angle, the efficiency of carbonization by the carbonization apparatus 1 can be further improved. Because the carbonization apparatus 1 of the present invention has the structure described above, it can be brought to the site where the material to be carbonized is generated and assembled on-site, allowing carbonization to be carried out at the site where it was generated without moving the material. Furthermore, by using the carbonization apparatus 1 of the present invention, not only small materials such as rice husks but also relatively large materials such as thinned timber can be carbonized separately or simultaneously.

[0022] When fixing the furnace 2 to the base 3, the wall portion 21 or, if the furnace 2 has a blade portion 24, the blade portion 24 and the base 3, for example in the configuration of Figure 1, the column portion 31 and / or beam portion 32, may be fixed by screw fastening, adhesive bonding, welding, etc. By fixing the furnace 2 to the base 3, fixing the column portion 31 and beam portion 32 on the base 3, and using screw fastening with bolts, etc., for the assembly of the furnace 2 as described above, each component can be disassembled into a more compact form for easier transport and easy assembly on-site. In this way, the transportation of the carbonization apparatus 1 of the present invention is made easier, and by performing the carbonization process at the location where the material to be carbonized is generated, the time and fuel used for transporting the material to be carbonized and the charcoal can be reduced. Furthermore, as described above, when using a base 3 composed of a column section 31 and a beam section 32, the base 3 only needs to be provided at one end of the wall section 21 in the longitudinal direction (either 3 or 3' in Figure 1(A)), but it may also be provided at both ends of the wall section 21 in the longitudinal direction, as shown in Figure 1(A). By providing the base 3 at both ends of the wall section 21 in the longitudinal direction in this way, the furnace 2 can be fixed in a more stable state. In addition, to make the structure of the carbonization apparatus 1 more robust, one or more beam sections 32 connecting the base 3 and the base 3' may be provided. In this case, a column section 31 may be provided on the beam section 32 that spans the base 3 and the base 3'.

[0023] As described above, the lid portion 22 may be directly connected to the longitudinal end of the wall portion 21 by screw fastening, adhesive bonding, welding, etc., or it may be connected to the column portion 31 and / or beam portion 32 of the base 3.

[0024] 4. Example of the form of carbonization apparatus 1 2 Figure 3 shows a further embodiment of the carbonization apparatus 1 of the present invention. The same reference numerals are used as in Figure 1, and parts that are not specifically described are the same as in the embodiment example (embodiment example 1) of Figure 1. In the example of Figure 3, an air supply mechanism 4 is provided inside the furnace 2, below the wall portion 21. For example, when small-sized materials to be carbonized, such as rice husks, are filled into the furnace 2, insufficient air may reach the bottom of the furnace 2, resulting in a decrease in carbonization efficiency. In such cases, the air supply mechanism 4 can supply sufficient air to the bottom of the furnace 2, thereby further increasing the carbonization efficiency.

[0025] Any air supply mechanism 4 can be used as long as it can supply air into the furnace 2 and withstand the heat generated during the carbonization process. A specific example of the air supply mechanism 4 is shown in Figure 4. The air supply mechanism 4 in Figure 4 includes a main body 41 which is a hollow member with a circular cross-section. Multiple holes 42 are provided on the surface of the main body 41, communicating with the hollow of the main body 41. A vent 43 is provided at one end of the main body 41, communicating with the hollow of the main body 41. The end of the main body 41 on the side without the vent 43 is closed. In the example in Figure 3, the vent 43 of the air supply mechanism 4 is exposed to the outside by penetrating the lid 22. By connecting a pump or the like to the exposed vent 43 and supplying air, air is supplied to the bottom of the furnace 2 through the holes 42. The material of the air supply mechanism 4 can be appropriately selected as long as it can withstand the heat generated during carbonization. Examples of such materials include metal materials such as iron, steel, and aluminum, glass materials such as heat-resistant glass, and resin materials such as heat-resistant resin.

[0026] 5. Example 3 of the form of carbonization apparatus 1 Further embodiments of the carbonization apparatus 1 of the present invention are shown in Figure 5(A). Note that the same reference numerals are used as in Figure 1, and parts not specifically described are the same as those in the embodiment shown in Figure 1. In the embodiment shown in Figure 5(A), the furnace 2 includes a stirring section 5 comprising a rotating shaft 51 and one or more blades 52 protruding from the rotating shaft 51. Figures 6(A) and (B) show one embodiment of the stirring section 5. As shown in Figures 6(A) and (B), the stirring section 5 is equipped with a rod-shaped rotating shaft 51 having a circular cross-section and multiple rod-shaped blades 52 protruding from the rotating shaft 51. In the carbonization apparatus 1 of Figure 5(A), holes are made in any location on both sides of the lids 22, 22 for passing the rotating shaft 51 of the stirring section 5, bearings are provided as needed, and a part of the rotating shaft 51 is passed through the holes and exposed to the outside. Power from a motor or engine is connected to the exposed rotating shaft 51 via gears or the like as needed. By operating the power source, the rotating shaft 51 rotates, and the blades 52 attached to the rotating shaft 51 agitate the material to be carbonized contained in the furnace 2. By providing such an agitation unit 5, the carbonization process of the material to be carbonized can be carried out more efficiently. The material of the agitation unit 5 can be appropriately selected on the condition that it can withstand the heat during carbonization. Examples of such materials include metal materials such as iron, steel, and aluminum, glass materials such as heat-resistant glass, or resin materials such as heat-resistant resin. In addition, the air supply mechanism 4 may also be provided in this embodiment.

[0027] 6. Example of the form of carbonization apparatus 1 4 Further embodiments of the carbonization apparatus 1 of the present invention are shown in Figure 5(B). The same reference numerals are used as in Figure 1, and parts that are not specifically described are the same as those in the embodiment shown in Figure 1. In the embodiment shown in Figure 5(B), the furnace 2 includes a stirring section 5 which includes a rotating shaft 51 and one or more blades 52 protruding from the rotating shaft 51, and at least a part of the blades 52 is a helical blade along the rotating shaft 51. One embodiment of the stirring section 5 is shown in Figures 6(C) to (E). As shown in Figures 6(C) to (E), the stirring section 5 is equipped with a rod-shaped rotating shaft 51 with a circular cross-section, and rod-shaped blades 52' and helical blades 52'' protruding from the rotating shaft 51. As shown in Figures 6(C) to (E), the stirring section 5 may be equipped with both rod-shaped blades 52' and helical blades 52'', or it may be equipped with only helical blades 52''. In the carbonization apparatus 1 shown in Figure 5(B), the stirring unit 5 is installed in the carbonization apparatus 1 in the same manner as in the above-described embodiment example 3. By providing the stirring unit 5 as described above, the material to be carbonized can be stirred not only in the vertical direction but also in the front-to-back direction, thereby enabling the carbonization process to proceed even more efficiently. In this embodiment example as well, the air supply mechanism 4 may also be provided.

[0028] 7. Example of the form of carbonization apparatus 1 5 Further embodiments of the carbonization apparatus 1 of the present invention are shown in Figure 7(A). In the embodiment shown in Figure 7(A), a hopper section 6 is included, which includes a container section 61 with at least an open top and a discharge port 62 for discharging the contents from the container section 61 into the furnace. An embodiment of the hopper section 6 is shown in Figure 8. The hopper section 6 includes a container section 61 with at least an open top and a discharge port 62 which is an opening that communicates with the inside of the container section 61. The upper opening of the container section 61 may be provided with a lid if necessary (not shown). In the embodiment shown in Figure 7(A), the container section 61 is fixed to the column section 31 and / or beam section 32 by screw fastening or the like. Also, a hole is made at any location in the lid section 23, and the discharge port 62 is inserted into the hole. By providing a hopper section 6 as described above, the carbonization process can be carried out more efficiently while continuously supplying a small-sized and large-quantity material to be carbonized, such as rice husks, into the furnace 2. In addition, this embodiment may also include the air supply mechanism 4 and / or the stirring unit 5.

[0029] 8. Example 6 of the form of carbonization apparatus 1 Further embodiments of the carbonization apparatus 1 of the present invention are shown in Figure 7(B). In the embodiment shown in Figure 7(B), the carbonization apparatus 1 is equipped with a stirring section 5 shown in Figures 6(C) to (E) and a hopper section 6 shown in Figures 8(A) and (B), and a part of the helical blades 52 is inserted into the discharge port 62 of the hopper section 6 (see Figure 8(C)). Holes are made at arbitrary locations in the lid section 22 on the side where the container section 61 and the hopper section 6 are not provided, and a rotating shaft 51 is inserted into these holes, which are equipped with bearings or the like as needed, so that it is exposed to the outside of the furnace 2. When combining the stirring section 5 and the hopper section 6 as described above, it is preferable that the diameter of the helical blades 52'' in the stirring section 5 (L1 in Figure 6(E)) be approximately the same as or slightly smaller than the inner diameter of the discharge port 62 of the hopper section 6 (L2 in Figure 8(B)). In this way, by combining the stirring unit 5 and the hopper unit 6, the carbonization process can be carried out more efficiently by stirring the material to be carbonized in the furnace 2 while continuously supplying a small-sized, large-volume material to be carbonized, such as rice husks.

[0030] Further embodiments of the present invention are shown below. [1] A carbonization apparatus including a furnace and a stand for supporting the furnace, The furnace includes at least two wall sections, each containing a plate having a certain length, and a lid provided at each of the longitudinal ends of the wall sections, wherein the at least two wall sections are directly or indirectly connected along one of their long sides. The wall portion of the furnace is fixed to the base such that each short side of the wall portion and the contact surface of the carbonization apparatus form an acute angle. A carbonization apparatus characterized by the following: [2] The carbonization apparatus according to [1], wherein the base includes at least two columnar sections and at least one beam section spanning the upper part of the columnar sections, and is provided at at least one end in the longitudinal direction of the wall section. [3] The carbonization apparatus described in [1], wherein an air supply mechanism is provided in the furnace on the lower side of the wall portion. [4] Furthermore, the carbonization apparatus according to [1] or [2] includes a stirring section in the furnace that includes a rotating shaft and one or more blades protruding from the rotating shaft, [5] The carbonization apparatus according to [3], wherein at least a portion of the blades of the stirring section is a helical blade along the axis of rotation, and [6] The carbonization apparatus according to any one of [1] to [4] further includes a container section having at least an open top and a hopper section including a discharge port for discharging the contents from the container section into the furnace. [Industrial applicability]

[0031] Because the carbonization apparatus of the present invention has a relatively simple structure, it can be brought to the site where the material to be carbonized is generated and assembled on-site, allowing for carbonization at the site without moving the material. Furthermore, by using the carbonization apparatus of the present invention, not only small materials such as rice husks but also relatively large materials such as thinned timber can be carbonized. Therefore, a carbonization apparatus is provided that allows for more efficient and effective utilization of materials to be carbonized while being environmentally conscious. [Explanation of Symbols]

[0032] 1: Carbonization device 2: Furnace, 21: Wall section, 22: Lid section, 23: Bottom section, 24: Blade section 3: Base, 31: Column, 32: Beam 4: Air supply mechanism, 41: Main body, 42: Hole, 43: Ventilation opening 5: Agitation section, 51: Rotating shaft, 52: Blades 6: Hopper section, 61: Container section, 62: Discharge port

Claims

1. A carbonization apparatus including a furnace and a stand supporting the furnace, The furnace includes at least two wall sections, each containing a plate having a certain length, and a lid provided on the longitudinal end of each of the wall sections, wherein the at least two wall sections are directly or indirectly connected along one of their long sides. The wall portion of the furnace is fixed to the base such that each short side of the wall portion and the contact surface of the carbonization apparatus form an acute angle. A carbonization apparatus characterized by the following:

2. The carbonization apparatus according to claim 1, wherein the base includes at least two columnar sections and a beam section that spans at least the upper part of the columnar sections, and is provided at at least one end in the longitudinal direction of the wall section.

3. The carbonization apparatus according to claim 1, wherein an air supply mechanism is provided on the lower side of the wall portion inside the furnace.

4. Furthermore, the carbonization apparatus according to claim 1, further comprising a stirring section in the furnace including a rotating shaft and one or more blades protruding from the rotating shaft.

5. The carbonization apparatus according to claim 4, wherein at least a portion of the blades of the stirring section is a helical blade along the rotation axis.

6. Furthermore, the carbonization apparatus according to claim 1, further comprising a container section having at least an open top and a hopper section including a discharge port for discharging the contents from the container section into the furnace.

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