Carbonization furnace

Abstract

To provide a carbonization furnace capable of carbonizing a large amount of carbonization objects.SOLUTION: There is provided a carbonization furnace 100 comprising a container 120 forming a furnace space S0 therein for a carbonization object W such as wood biomass, i.e., a raw material to be combusted and carbonized, and a switching mechanism 130 switching between a shrunk state of the container 120 made to have a first length and an expanded state of the container made to have a second length L2 longer than the first length in a first direction DR1, i.e., the horizontal direction.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a carbonization furnace.

Background Art

[0002] There is known a carbonization furnace that obtains carbide using a carbide material such as woody biomass as a raw material, and is mounted on a truck (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a mobile carbonization furnace, the space of the vehicle on which it is loaded is inevitably limited. Therefore, there is a problem that the size of the carbonization furnace is restricted, and as a result, the production amount of biochar (and / or biofuel) as a product is restricted.

[0005] The present disclosure has been made in view of such circumstances, and an object thereof is to provide a carbonization furnace capable of processing a large amount of carbide material.

Means for Solving the Problems

[0006] In order to solve the above problems, the carbonization furnace of the present disclosure employs the following means. The carbonization furnace according to one aspect of the present disclosure includes a container that forms an internal furnace space in which combustion and carbonization of a carbide material as a raw material are performed, and the container is configured to be expandable along a first direction that is a horizontal direction.

Effects of the Invention

[0007] According to the present disclosure, a carbonization furnace capable of processing a large amount of carbide can be provided.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Mode for Carrying Out the Invention

[0009] 〔First Embodiment〕 Hereinafter, a carbonization furnace according to an embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 is a side view of a vehicle 10 on which a carbonization furnace 100 according to the first embodiment of the present disclosure is loaded. FIG. 2 is a side view of the carbonization furnace 100 according to the first embodiment of the present disclosure. FIG. 3 is a cross-sectional view taken along the line A-A of the container 120 shown in FIG. 2, showing a contracted state in which the container 120 contracts along the first direction DR1. FIG. 4 is a cross-sectional view taken along the line A-A of the container 120 shown in FIG. 2, showing an expanded state in which the container 120 expands along the first direction DR1.

[0010] A carbonization furnace 100 according to an embodiment of the present disclosure is a furnace for producing biochar using a carbonizable material W such as woody biomass as a raw material or a furnace for producing biofuel. As shown in FIG. 1, the carbonization furnace 100 is a mobile furnace that can be loaded on a vehicle 10 such as a truck. As shown in FIGS. 1 and 2, the carbonization furnace 100 includes a container 120, a switching mechanism 130, a floor 140, and a chimney 160.

[0011] The vehicle 10 includes support legs 12 that support the load of a moving part 122 of the container 120 described later. The support legs are members attached to the vehicle body 11 and can be in either a supported state shown by a solid line or a stored state shown by a dotted line. When the container 120 is in the expanded state described later, the operator of the carbonization furnace 100 sets the support legs 12 in the supported state and transmits the load of the moving part 122 to the installation surface S via the support legs 12.

[0012] The container 120 is a metal member in the shape of a rectangular parallelepiped with an internal furnace space S0 formed therein and an open upper surface. Note that the shape of the container 120 is not limited to a rectangular parallelepiped shape. The container 120 is provided with a connection portion (not shown) used for connection and fixation to the vehicle 10.

[0013] As shown in FIGS. 2 to 4, the container 120 has a fixing portion 121 fixed to the installation surface 11a of the vehicle body 11 of the vehicle 10 and a pair of moving portions 122 movably attached to the installation surface 11a.

[0014] The fixing portion 121 has a lid portion 121a, a bottom portion 121b, a pair of side wall portions 121c, and a pair of opening portions 121d. The lid portion 121a is disposed above the moving portion 122 in the vertical direction VD and is connected to the upper end of the side wall portion 121c at the end in the second direction DR2 which is a horizontal direction.

[0015] The bottom portion 121b is disposed below the moving portion 122 in the vertical direction VD and is connected to the lower end of the side wall portion 121c at the end in the second direction DR2. The side wall portions 121c are arranged along the vertical direction VD and along the first direction DR1, with the upper end connected to the lid portion 121a and the lower end connected to the bottom portion 121b. In the fixing portion 121, the opening portions 121d are formed at both ends in the first direction DR1 and are regions closed by the moving portions 122.

[0016] The moving portion 122 is a member that is inserted into the opening portions 121d formed at both ends in the first direction DR1 of the fixing portion 121 and forms the furnace space S0 together with the fixing portion 121 by closing the opening portions 121d. The moving portion 122 has a lid portion 122a, a bottom portion 122b, and side wall portions 122c. The lid portion 122a is disposed below the lid portion 121a of the fixing portion 121 in the vertical direction VD and is connected to the upper end of the side wall portion 122c at the end in the first direction DR1 which is a horizontal direction.

[0017] The bottom 122b is disposed above the bottom 121b of the fixing portion 121 in the vertical direction VD and is connected to the lower end of the side wall portion 122c at the end in the first direction DR1. The side wall portion 122c is disposed along the vertical direction VD, with its upper end connected to the lid portion 122a and its lower end connected to the bottom 122b.

[0018] At least one intake opening 122c1 is formed in the side wall portion 122c. The intake opening 122c1 is an opening (through-hole) that communicates the upper space S1 with the outside of the container 120, and combustion air (air outside the container 120) can be taken from the outside of the container 120 into the upper space S1 through the intake opening 122c1. In the case of FIG. 2, the intake opening 122c1 is a rectangular opening extending in the second direction DR2 and is formed in the upper portions of a pair of side wall portions 122c facing each other in the first direction DR1.

[0019] As shown in FIG. 2, at least one insertion opening 122c2 is formed in the side wall portion 122c. The insertion opening 122c2 is an opening (through-hole) that communicates the lower space S2 with the outside of the container 120, and the burner 200 for ignition can be inserted from the outside of the container 120 into the upper space S1 through the insertion opening 122c2. In the case of FIG. 2, the insertion opening 122c2 is a circular opening and is formed in the lower portions of a pair of side wall portions 122c facing each other in the first direction DR1.

[0020] The switching mechanism 130 is a mechanism that switches between a contracted state (the state shown in FIG. 3) in which the container 120 has a first length L1 in the first direction DR1, which is the horizontal direction, and an expanded state (the state shown in FIG. 4) in which the container 120 has a second length L2 longer than the first length L1. When the vehicle 10 transports the carbonization furnace 100, the size of the carbonization furnace 100 can be reduced by setting it to the contracted state. When the combustion and carbonization of the material to be carbonized W are performed using the carbonization furnace 100, a large amount of the material to be carbonized W can be processed by setting it to the expanded state.

[0021] As shown in FIGS. 3 and 4, the switching mechanism 130 includes a support portion 131 and a mounting portion 132. The support portion 131 is a member that is fixed to the installation surface 11a and is formed to extend along the first direction DR1. The mounting portion 132 is a member that is fixed to the lower end of the bottom portion 122b of the moving portion 122 and is movably (slidably) attached to the support portion 131 along the first direction DR1.

[0022] FIG. 5 is a plan view of the carbonization furnace 100 shown in FIG. 3 as viewed from above, showing a contracted state in which the container 120 contracts along the first direction DR1. FIG. 6 is a plan view of the carbonization furnace 100 shown in FIG. 4 as viewed from above, showing an expanded state in which the container 120 expands along the first direction DR1. As shown in FIGS. 5 and 6, the switching mechanism 130 is arranged at a plurality of positions (six positions in the example shown in FIGS. 5 and 6 for one moving portion 122) with an interval along the second direction DR2 for each of the pair of moving portions 122.

[0023] FIG. 7 is a front view of the B portion of the container 120 shown in FIG. 6 as viewed along the second direction DR2. As shown in FIG. 7, a rack 122b1 formed to extend along the first direction DR1 is fixed to the bottom portion 122b of the moving portion 122. A handle 11b for transmitting an operation for the operator to move the moving portion 122 along the first direction DR1 is attached to the installation surface of the vehicle body 11.

[0024] A pinion gear 122b2 that is arranged in the furnace space S0 and meshes with the rack 122b1 is attached to the tip of the handle 11b. The operator rotates the pinion gear 122b2 by gripping and rotating the handle 11b, and moves the moving portion 122 to which the rack 122b1 engaged with the pinion gear 122b2 is fixed along the first direction DR1.

[0025] The handle 11b, the pinion gear 122b2, and the rack 122b1 function as a transmission unit that transmits an operation of an operator for moving the container 120 along the first direction DR1 with respect to the installation surface 11a to the moving unit 122. The transmission unit is configured as a part of the switching mechanism 130. Here, it is assumed that the operator manually operates the handle 11b, but the operation of the handle 11b may also be a motor operation by installing an operating device driven by an electric motor thereto.

[0026] As shown in FIG. 3, a floor 140 is attached inside the container 120. The floor 140 is, for example, a substantially rectangular plate-like member that extends in a horizontal plane and is provided at a height position of several tens of centimeters from the bottom 122b of the container 120. The floor 140 vertically partitions the furnace space S0. Of the furnace space S0 partitioned by the floor 140, the upper space is the upper space S1, and the lower space is the lower space S2. The upper space S1 is a space for storing the carbide W. The lower space S2 is a space (flow path) through which a gas containing combustion exhaust gas flows.

[0027] A communication part 141 is formed in the floor 140. The communication part 141 is a part that communicates the upper space S1 and the lower space S2. Examples of the communication part 141 include a large number of holes (through holes) formed in the floor 140. The purpose of providing the communication part 141 is to guide a gas containing combustion exhaust gas from the upper space S1 to the lower space S2 without dropping the carbide W or carbide stored in the upper space S1 into the lower space S2. Therefore, the specific shape and number of the communication part 141 are not particularly limited as long as the purpose can be achieved.

[0028] As shown in FIGS. 3 and 4, the floor 140 has a first floor part 140A and a second floor part 140B that are arranged in the horizontal direction. One end of the second floor part 140B in the first direction DR1 is fixed to the side wall part 122c. In the contracted state shown in FIG. 3, the first floor part 140A and the pair of second floor parts 140B are arranged in a state of overlapping in a predetermined range PA1 along the first direction DR1.

[0029] On one hand, in the expanded state, the first floor portion 140A and the second floor portion 140B are arranged in a state of overlapping within a range narrower than a predetermined range PA1 along the first direction DR1. Note that, in the expanded state, the first floor portion 140A and the second floor portion 140B may be arranged so as not to overlap in the first direction DR1.

[0030] Chimneys 160 are respectively provided on a pair of side wall portions 121c of the fixing portion 121 of the container 120. The chimneys 160 extend in the vertical direction VD along the side wall portions 121c of the container 120. For example, the uppermost opening (the outlet of the exhaust passage P1 described later) is located at a position higher than the lid portion 121a. Note that the position where the chimneys 160 are provided and the number of the chimneys 160 can be arbitrarily changed.

[0031] An exhaust passage P1 is formed inside the chimneys 160. The exhaust passage P1 is connected to the lower space S2 of the furnace space S0 at the lower part and is connected to the outside of the container 120 at the upper part. That is, the exhaust passage P1 is a passage that communicates the lower space S2 of the furnace space S0 and the outside of the container 120, and is also a passage for discharging the combustion exhaust gas guided from the upper space S1 to the lower space S2 to the outside of the container 120.

[0032] Here, the heat insulation structure of the container 120 will be described with reference to FIG. 8. FIG. 8 is a cross-sectional view of the C portion of the container shown in FIG. 6. As shown in FIG. 8, the moving portion 122 is arranged to be movable along the first direction DR1 along the inner peripheral surface 121c1 on the furnace space S0 side of the side wall portion 121c of the fixing portion 121.

[0033] As shown in FIG. 8, a first heat insulation material 121e is attached to the outer peripheral surface 121c2 on the outer space S4 side of the side wall portion 121c. A first refractory material 121f is attached to the inner peripheral surface 121c1 on the furnace space S0 side of the side wall portion 121c.

[0034] As shown in FIG. 8, a second heat insulation material 122A1 is attached to the inner peripheral surface 122A on the furnace space S0 side of the moving portion 122. A second refractory material 122B1 is attached to the inner peripheral surface 122B on the furnace space S0 side of the second heat insulation material 122A1.

[0035] The carbonization furnace 100 of the present embodiment described above has the following operations and effects. According to the carbonization furnace 100 of the present embodiment, for example, when transporting the carbonization furnace 100, the size of the carbonization furnace 100 can be reduced by setting the container 120 in a contracted state. When burning and carbonizing the material to be carbonized W using the carbonization furnace 100, a large amount of the material to be carbonized W can be processed by setting the container 120 in an expanded state.

[0036] According to the carbonization furnace 100 of the present embodiment, the furnace space S0 is formed by closing the opening 121d formed at the end of the fixing portion 121 fixed to the installation surface 11a in the first direction DR1 with the moving portion, and the burning and carbonization of the material to be carbonized W can be performed in the furnace space S0. The moving portion 122 is attached so as to be movable along the first direction DR1, which is a horizontal direction with respect to the installation surface 11a on which the fixing portion 121 is installed. Therefore, by moving the moving portion 122 along the first direction DR1 by the switching mechanism 130, the contracted state and the expanded state can be appropriately switched.

[0037] According to the carbonization furnace 100 of the present embodiment, the operator can appropriately switch between the contracted state and the expanded state by operating the transmission portion to move the moving portion 122 of the container 120 along the first direction DR1 with respect to the installation surface 11a.

[0038] According to the carbonization furnace 100 of the present embodiment, the first heat insulating material 121e is attached to the outer peripheral surface 121c2 on the external space S4 side of the side wall portion 121c disposed on the external space S4 side with respect to the moving portion 122. Thereby, it is possible to appropriately suppress heat from being released from the furnace space S0 to the external space S4 through the side wall portion 121c. Further, the second heat insulating material 122A1 is attached to the inner peripheral surface 122B on the furnace space S0 side of the moving portion 122 disposed on the furnace space S0 side with respect to the side wall portion 121c. Thereby, it is possible to appropriately suppress heat from being released from the furnace space S0 to the external space S4 through the moving portion 122.

[0039] According to the carbonization furnace 100 of the present embodiment, by arranging the first floor portion 140A and the second floor portion 140B arranged in the horizontal direction so as to overlap in a predetermined range PA1 along the first direction DR1, when the container 120 is in a contracted state, the length of the floor 140 in the first direction DR1 can be shortened. Further, by arranging the first floor portion 140A and the second floor portion 140B so as to overlap in a range narrower than the predetermined range PA1 along the first direction DR1 or not to overlap along the first direction DR1, when the container 120 is in an expanded state, the length of the floor 140 in the first direction DR1 can be appropriately lengthened.

[0040] According to the carbonization furnace 100 of the present embodiment, since the container 120 has an insertion opening 122c2 into which the burner 200 for ignition is inserted from the outside, the material to be carbonized W stored in the container 120 can be ignited.

[0041] 〔Second Embodiment〕 Next, the carbonization furnace 100A according to the second embodiment of the present disclosure will be described with reference to the drawings. The second embodiment is a modification of the first embodiment, and is the same as the first embodiment except as specifically described below, and the description thereof will be omitted below.

[0042] The container 120 of the carbonization furnace 100 of the first embodiment closes the opening 121d of the fixed portion 121 with the moving portion 122 by moving the moving portion 122 inside the fixed portion 121. On the other hand, the container 120 of the carbonization furnace 100A of the present embodiment closes the opening 121d of the fixed portion 121 with the moving portion 122 by moving the moving portion 122 outside the fixed portion 121.

[0043] FIG. 9 is a cross-sectional view of the container 120 of the carbonization furnace 100A according to the second embodiment of the present disclosure, showing a contracted state in which the container 120 contracts along the first direction DR1. FIG. 10 is a cross-sectional view of the container 120 of the carbonization furnace 100A according to the second embodiment of the present disclosure, showing an expanded state in which the container 120 expands along the first direction DR1. FIG. 11 is a plan view of the carbonization furnace 100A shown in FIG. 9 as viewed from above, showing a contracted state in which the container 120 contracts along the first direction DR1. FIG. 12 is a plan view of the carbonization furnace 100A shown in FIG. 10 as viewed from above, showing an expanded state in which the container 120 expands along the first direction DR1.

[0044] As shown in FIGS. 9 to 12, the container 120 of the carbonization furnace 100A of the present embodiment closes the opening 121d of the fixed portion 121 with the moving portion 122 by moving the moving portion 122 outside the fixed portion 121.

[0045] Here, the heat insulation structure of the container 120 will be described with reference to FIG. 13. FIG. 13 is a cross-sectional view of the D portion of the container 120 shown in FIG. 12. As shown in FIG. 13, the moving portion 122 is disposed so as to be movable along the first direction DR1 along the outer peripheral surface 121c2 on the outer space S4 side of the side wall portion 121c of the fixed portion 121.

[0046] As shown in FIG. 13, a first heat insulating material 121e is attached to the inner peripheral surface 121c1 on the furnace space S0 side of the side wall portion 121c. A first refractory material 121f is attached to the inner peripheral surface 121e1 on the furnace space S0 side of the first heat insulating material 121e. Thereby, it is possible to appropriately suppress heat from being released from the furnace space S0 to the external space S4 through the side wall portion 121c.

[0047] As shown in FIG. 13, a second heat insulating material 122C1 is attached to the outer peripheral surface 122C on the external space S4 side of the moving portion 122. A second refractory material 122D1 is attached to the inner peripheral surface 122D on the furnace space S0 side of the moving portion 122. Thereby, it is possible to appropriately suppress heat from being released from the furnace space S0 to the external space S4 through the moving portion 122.

[0048] [Embodiment 3] Next, the carbonization furnace 100B according to the third embodiment of the present disclosure will be described with reference to the drawings. The third embodiment is a modification of the first embodiment and is the same as the first embodiment except as specifically described below, and the description thereof will be omitted below.

[0049] The floor 140 provided in the carbonization furnace 100 of the first embodiment has a first floor portion 140A and a second floor portion 140B arranged in the horizontal direction, and the second floor portion 140B is moved along the first direction DR1 together with the moving portion 122. On the other hand, the floor 141B provided in the carbonization furnace 100B of the present embodiment has a first floor portion 142B and a second floor portion 143B configured to be foldable along an axis X extending along a second direction DR2 orthogonal to the first direction DR1.

[0050] FIG. 14 is a cross-sectional view of the container 120 of the carbonization furnace 100B according to the third embodiment of the present disclosure, showing a contracted state in which the container 120 is contracted along the first direction DR1. FIG. 15 is a cross-sectional view of the container 120 of the carbonization furnace 100B according to the third embodiment of the present disclosure, showing an expanded state in which the container 120 is expanded along the first direction DR1.

[0051] As shown in FIG. 14, in the contracted state, it is folded about the axis X so that the first floor portion 142B and the second floor portion 143B are arranged on different planes. On the other hand, as shown in FIG. 15, in the expanded state, the first floor portion 142B and the second floor portion 143B are arranged horizontally.

[0052] According to the carbonization furnace 100B of the present embodiment, by folding the first floor portion 142B and the second floor portion 143B configured to be foldable along the axis X so as to be arranged on different planes, the length of the floor 141B in the first direction DR1 can be shortened when the container 120 is in the contracted state. Further, by arranging the first floor portion 142B and the second floor portion 143B horizontally, the length of the floor 141B in the first direction DR1 can be appropriately lengthened when the container 120 is in the expanded state.

[0053] The carbonization furnace according to the present embodiment described above can be understood as follows, for example. The carbonization furnace (100) according to the first aspect of the present disclosure includes a container (120) that forms a furnace space (S0) inside where combustion and carbonization of a carbide (W) as a raw material are performed, and a switching mechanism (130) that switches between a contracted state in which the container has a first length (L1) in a first direction (DR1) that is a horizontal direction and an expanded state in which the container has a second length (L2) longer than the first length.

[0054] According to the carbonization furnace according to the first aspect of the present disclosure, for example, when transporting the carbonization furnace, the size of the carbonization furnace can be reduced by setting the container in the contracted state. When performing combustion and carbonization of the carbide using the carbonization furnace, a large amount of carbide can be processed by setting the container in the expanded state.

[0055] The carbonization furnace according to the second aspect of the present disclosure further includes the following configuration in the first aspect. That is, the container has a fixed portion (121) fixed to the installation surface (11a) and a moving portion (122) movably attached along a first direction (DR1) that is a horizontal direction with respect to the installation surface. The fixed portion has a pair of side wall portions (121c) extending in the vertical direction and arranged along the first direction, a lid portion (121a) connected to the upper ends of the pair of side wall portions and extending along a second direction (DR2) that is a horizontal direction orthogonal to the first direction, and an opening (121d) formed at an end in the first direction. The moving portion closes the opening and forms the furnace space together with the fixed portion. The switching mechanism includes a support portion (131) fixed to the installation surface and formed to extend along the first direction, and an attachment portion (132) fixed to the lower end of the moving portion and movably attached to the support portion along the first direction.

[0056] According to the carbonization furnace according to the second aspect of the present disclosure, a furnace space is formed by closing an opening formed at an end in the first direction of a fixing portion fixed to an installation surface with a moving portion, and combustion and carbonization of a carbide can be performed in the furnace space. The moving portion is attached so as to be movable along a first direction that is horizontal with respect to the installation surface on which the fixing portion is installed. Therefore, by moving the moving portion along the first direction by a switching mechanism, the contraction state and the expansion state can be appropriately switched.

[0057] The carbonization furnace according to the third aspect of the present disclosure further includes the following configuration in the second aspect. That is, the switching mechanism includes a transmission unit (11b, 122b1, 122b2) that transmits an operation of an operator for moving the container along the first direction with respect to the installation surface to the moving portion.

[0058] According to the carbonization furnace according to the third aspect of the present disclosure, the operator can appropriately switch between the contraction state and the expansion state by operating the transmission unit to move the container along the first direction with respect to the installation surface.

[0059] The carbonization furnace according to the fourth aspect of the present disclosure further includes the following configuration in the second or third aspect. That is, the moving portion is arranged to be movable along the first direction along the inner peripheral surface (121c1) on the furnace space side of the side wall portion of the fixing portion, and a first heat insulating material (121e) is attached to the outer peripheral surface (121c2) on the external space side of the side wall portion. A second heat insulating material (122A1) is attached to the inner peripheral surface (122A) on the furnace space side of the moving portion.

[0060] According to the carbonization furnace according to the fourth aspect of the present disclosure, a first heat insulating material is attached to the outer peripheral surface on the external space side of the side wall portion arranged on the external space side of the moving portion. Thereby, heat release from the furnace space to the external space through the side wall portion can be appropriately suppressed. Also, a second heat insulating material is attached to the inner peripheral surface on the furnace space side of the moving portion arranged on the furnace space side of the side wall portion. Thereby, heat release from the furnace space to the external space through the moving portion can be appropriately suppressed.

[0061] The carbonization furnace according to the fifth aspect of the present disclosure further includes the following configuration in the second aspect or the third aspect. That is, the moving part is arranged to be movable along the first direction along the outer peripheral surface (121c2) on the outer space side of the side wall part of the fixed part, and a first heat insulating material (121e) is attached to the inner peripheral surface (121c1) on the furnace space side of the side wall part, and a second heat insulating material (122C1) is attached to the outer peripheral surface (122C) on the outer space side of the moving part.

[0062] According to the carbonization furnace according to the fifth aspect of the present disclosure, a first heat insulating material is attached to the inner peripheral surface on the furnace space side of the side wall part arranged on the furnace space side of the moving part. Thereby, heat release from the furnace space to the outer space through the side wall part can be appropriately suppressed. Also, a second heat insulating material is attached to the outer peripheral surface on the outer space side of the moving part arranged on the outer space side of the side wall part. Thereby, heat release from the furnace space to the outer space through the moving part can be appropriately suppressed.

[0063] The carbonization furnace according to the sixth aspect of the present disclosure further includes the following configuration in the first aspect or the second aspect. That is, the floor (140) has a first floor part (140A) and a second floor part (140B) arranged in the horizontal direction, and in the contracted state, the first floor part and the second floor part are arranged in a state of overlapping in a predetermined range along the first direction, and in the expanded state, the first floor part and the second floor part are arranged in a state of overlapping in a range narrower than the predetermined range along the first direction or not overlapping along the first direction.

[0064] According to the carbonization furnace according to the sixth aspect of the present disclosure, by arranging the first floor part and the second floor part arranged in the horizontal direction in a state of overlapping in a predetermined range along the first direction, the length of the floor part in the first direction can be shortened when the container is in the contracted state. Also, by arranging the first floor part and the second floor part in a state of overlapping in a range narrower than the predetermined range along the first direction or not overlapping along the first direction, the length of the floor part in the first direction can be appropriately lengthened when the container is in the expanded state.

[0065] The carbonization furnace according to the seventh aspect of the present disclosure further includes the following configuration in the first aspect. That is, the floor (141B) has a first floor portion (142B) and a second floor portion (143B) that are configured to be foldable along an axis (X) extending along a second direction orthogonal to the first direction. In the expanded state, the first floor portion and the second floor portion are arranged on the same plane, and in the contracted state, the first floor portion and the second floor portion are arranged on different planes.

[0066] According to the carbonization furnace according to the seventh aspect of the present disclosure, by folding the first floor portion and the second floor portion that are configured to be foldable along the axis so as to be arranged on different planes, the length of the floor in the first direction can be shortened when the container is in the contracted state. Further, by arranging the first floor portion and the second floor portion in the horizontal direction, the length of the floor in the first direction can be appropriately lengthened when the container is in the expanded state.

[0067] The carbonization furnace according to the eighth aspect of the present disclosure further includes the following configuration in the first aspect or the second aspect. That is, the container has an insertion opening (122c2) into which a burner (200) for ignition from the outside is inserted.

[0068] According to the carbonization furnace according to the eighth aspect of the present disclosure, since the container has an insertion opening into which a burner for ignition from the outside is inserted, it is possible to ignite the material to be carbonized stored in the container.

Explanation of Reference Numerals

[0069] 10 Vehicle 11 Chassis 11a Installation Surface 11b Handle 12 Support Leg 100, 100A, 100B Carbonization Furnace 120 Container 121 Fixing Portion 121a Lid Portion 121b Bottom Portion 121c Side Wall Portion 121c1 Inner Peripheral Surface 121c2 Outer peripheral surface 121d Opening 121e First heat insulation material 121e1 Inner peripheral surface 121f First refractory material 122 Moving part 122A Inner peripheral surface 122A1 Second heat insulation material 122B Inner peripheral surface 122B1 Second refractory material 122C Outer peripheral surface 122C1 Second heat insulation material 122D Inner peripheral surface 122D1 Second refractory material 122a Cover part 122b Bottom part 122b1 Rack 122b2 Pinion gear 122c Side wall part 122c1 Intake opening 122c2 Insertion opening 130 Switching mechanism 131 Support part 132 Mounting part 140 Floor 140A First floor part 140B Second floor part 141 Communication part 141B Floor 142B First floor part 143B Second floor part 160 Chimney 200 Burner DR1 First direction DR2 Second direction PA1 Predetermined range S Installation surface S0 Furnace space S1 Upper space S2 Lower space S4 External space VD Vertical direction W Material to be carbonized X Axis

Claims

1. A container that forms inside it a furnace space where combustion and carbonization of a carbide as a raw material are carried out, and a switching mechanism that switches the container between a contracted state having a first length and an expanded state having a second length longer than the first length in a first direction that is horizontal. A carbonization furnace comprising these.

2. The container has a fixed part fixed to the installation surface, and a moving part movably attached along the first direction, and the fixed part has a pair of side wall parts extending in the vertical direction and arranged along the first direction, a lid part connected to the upper ends of the pair of side wall parts and extending along a second direction that is a horizontal direction orthogonal to the first direction, and an opening formed at an end in the first direction. The moving part closes the opening and forms the furnace space together with the fixed part, and the switching mechanism has a support part fixed to the installation surface and formed to extend along the first direction, and an attachment part fixed to the lower end of the moving part and movably attached to the support part along the first direction. The carbonization furnace according to Claim 1 comprising these.

3. The switching mechanism according to Claim 2, further comprising a transmission part that transmits an operation of an operator for moving the container along the first direction with respect to the installation surface to the moving part.

4. The moving part is arranged to be movable along the first direction along the inner peripheral surface on the furnace space side of the side wall part of the fixed part, a first heat insulating material is attached to the outer peripheral surface on the external space side of the side wall part, and a second heat insulating material is attached to the inner peripheral surface on the furnace space side of the moving part. The carbonization furnace according to Claim 2 or Claim 3 comprising these.

5. The moving part is arranged to be movable along the first direction along the outer peripheral surface on the outer space side of the side wall part of the fixing part. A first heat insulating material is attached to the inner peripheral surface of the side wall part on the furnace space side. The carbonization furnace according to claim 2 or claim 3, wherein a second heat insulating material is attached to the outer peripheral surface of the moving part on the outer space side.

6. The floor has a first floor part and a second floor part arranged in the horizontal direction. In the contracted state, the first floor part and the second floor part are arranged in a state of overlapping within a predetermined range along the first direction, and in the expanded state, the first floor part and the second floor part are arranged in a state of overlapping within a range narrower than the predetermined range along the first direction or not overlapping along the first direction. The carbonization furnace according to claim 1 or claim 2.

7. The floor has a first floor part and a second floor part configured to be foldable along an axis extending along a second direction orthogonal to the first direction. In the expanded state, the first floor part and the second floor part are arranged horizontally, and in the contracted state, the first floor part and the second floor part are folded so as to be arranged on different planes. The carbonization furnace according to claim 1.

8. The container has an insertion opening into which a burner for ignition is inserted from the outside. The carbonization furnace according to claim 1 or claim 2.

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