JP4700399B2 - Charcoal kiln - Google Patents

Description

  The present invention relates to a charcoal kiln used for producing charcoal such as bamboo charcoal.

  Charcoal such as bamboo charcoal has many excellent effects for improving the living environment such as dehumidification, insect repellent, antibacterial, deodorant, water purification, and soil improvement in addition to the use of fuel.

  In addition, charcoal holds carbon in a solid state, so wood charcoal can suppress the generation of carbon dioxide, and environmental problems such as global warming, which have become a major social problem recently. It is also highly anticipated as a countermeasure.

  As the benefits of charcoal become widely known to the public, apart from those that are industrially mass-produced, personally, for example, small-scale and affordable so that charcoal can be burned as a hobby or side job after retirement. The demand for charcoal kilns is growing rapidly.

  As the charcoal firing kiln, as shown in Patent Document 1 below, a charcoal firing chamber having a horizontally long shape is provided, and a hot air inlet is provided at the upper end of the front wall of the charcoal firing chamber, and hot air is provided at the lower end of the rear wall. A discharge port is provided. And in the state which accommodated charcoal materials, such as bamboo, in a charcoal baking room, a hot air is distribute | circulated from the front wall upper end of a charcoal baking chamber toward the rear wall lower end.

Moreover, the charcoal-grilling furnace shown in the following patent document 2 has a vertically-oriented cylindrical charcoal-burning chamber, a hot-air introduction path is formed inside the charcoal-burning chamber, and a hot-air discharge path is formed outside the charcoal-burning chamber. ing. The hot air introduced into the hot air introduction path is introduced into the cylindrical charcoal chamber from the upper end and discharged from the lower end, and the hot air is further discharged to the outside through the outer hot air discharge path.
Japanese Patent Laid-Open No. 10-110172 (FIGS. 1-3) JP 2004-250475 A (FIGS. 1 and 2)

  However, the charcoal kiln shown in Patent Document 1 has a high temperature in the vicinity of the hot air introduction port in the charcoal baking chamber, a low temperature in the vicinity of the hot air discharge port, and the temperature distribution in the charcoal baking chamber becomes uneven, resulting in temperature unevenness. . For this reason, underheating and overheating occur depending on the position where the charcoal material is stored, and almost no good quality charcoal can be obtained, especially for those who have little experience or skill, no good quality charcoal can be obtained. There was also.

  Also, in the charcoal kiln shown in Patent Document 2, since hot air is introduced from the inside of the cylindrical charcoal chamber and discharged to the outside, the inside of the charcoal chamber is high temperature and the outside is low temperature, The temperature distribution in the charcoal baking chamber becomes uneven, and it has the same problem that it is difficult to obtain good quality charcoal.

  The object of the present invention is to provide a charcoal kiln capable of solving the above-mentioned problems of the prior art and easily obtaining good quality charcoal.

  In order to achieve the above object, the present invention is summarized as follows.

[1] An outer kiln having an opening at the upper end and provided with an outer kiln hot air inlet on the bottom wall;
An upper lid attached to the upper end opening of the outer kiln;
An inner kiln arranged in the outer kiln and configured as a charcoal firing chamber;
A chimney tube having a lower end disposed in the charcoal baking chamber and an upper end penetrating the upper lid and disposed outside,
An outer peripheral hot air passage provided between the outer kiln and the inner kiln, into which hot air is introduced from the outer kiln hot air inlet;
The degree of opening in the gap (hot air introduction gap) between the upper lid and the upper end opening edge of the inner kiln by raising and lowering the upper lid and moving the upper lid to and away from the upper end opening edge of the inner kiln. Is configured to be adjustable,
In the state where the hot air introduction gap is opened, the hot air introduced into the outer peripheral hot air passage is introduced into the inner kiln through the hot air introduction gap, and the hot air is discharged to the outside through the chimney tube. While
A charcoal kiln configured to adjust the amount of hot air introduced from the outer peripheral hot air passage into the inner kiln according to the degree of opening of the hot air introduction gap.

[2] A heating chamber is provided below the outer kiln, and hot air is configured to be introduced from the heating chamber into the outer peripheral hot air passage through the outer kiln hot air inlet.
The charcoal-fired kiln according to item 1, wherein a bypass flue pipe is provided in the heating chamber to discharge hot air in the chamber directly to the outside.

  [3] The charcoal-fired kiln according to 1 or 2 above, wherein the upper lid is provided with a hot air outlet for discharging hot air in the inner kiln to the outside, and an outlet opening / closing plate is provided at the hot air outlet so as to be freely opened and closed. .

  [4] The above item 1 wherein an inner kiln hot air inlet is provided on the bottom wall of the inner kiln corresponding to the outer kiln hot air inlet, and an inlet opening / closing plate is provided at the inner kiln hot air inlet so as to be freely opened and closed. The charcoal-baking kiln of any one of -3.

  According to the charcoal-fired kiln of the invention [1], since the outer hot air passage is provided on the outer periphery of the inner kiln, the outer kiln is heated uniformly from the outer periphery of the inner kiln, and heat diffusion to the outer side in the inner kiln is prevented. Heat is also prevented. Therefore, heat treatment of wood such as bamboo grove in the inner kiln can be performed at high temperature and evenly, and good quality charcoal such as bamboo charcoal can be obtained efficiently and reliably.

  Further, since the upper lid is moved up and down to adjust the opening degree of the hot air introduction gap between the upper lid and the inner kiln, the amount of hot air introduced into the inner kiln can be easily adjusted only by raising and lowering the upper lid. That is, the transition operation between the heat treatment, the curing treatment, and the cooling treatment can be reliably performed only by performing the lifting operation of the upper lid.

  Furthermore, the charcoal-fired kiln of the present invention basically has only an inner kiln arranged in the outer kiln, has a simple structure, and can reduce kiln production days and production costs.

  According to the charcoal kiln of the invention [2], since the bypass flue pipe is provided in the heating chamber, the heat treatment and the curing treatment can be performed efficiently. That is, when performing the heat treatment, by opening the bypass flue pipe in advance and sufficiently burning the fuel in the heating chamber, high-temperature hot air in the heating chamber can be effectively introduced into the charcoal baking chamber, Heat treatment can be performed efficiently. Further, by opening the bypass flue pipe and burning the fuel in the heating chamber during the curing process, the inner kiln can be heated and maintained at a high temperature, and the curing process can be performed efficiently.

  According to the charcoal-fired kiln of the invention [3], the upper lid is provided with a hot air discharge port that can be opened and closed by an opening / closing plate. Thermal energy is transmitted efficiently and heat treatment can be performed efficiently.

  According to the charcoal-fired kiln of the invention [4], since the inner kiln hot air inlet that can be opened and closed by the opening and closing plate is provided on the inner kiln bottom wall, the inner kiln hot air inlet of the inner kiln bottom wall is opened after the curing treatment. Therefore, a large amount of air can be supplied into the charcoal firing chamber, and the volatile gas generated from the charcoal material can be reliably burned, so that the scouring treatment can be performed reliably and high quality charcoal can be obtained more reliably. it can.

  1 and 2 are sectional views showing a charcoal kiln according to an embodiment of the present invention. As shown in both figures, this charcoal-fired kiln is basically composed of an outer kiln (1), an upper lid (2), an inner kiln (3), a chimney tube (4), and a heating chamber (5). As an element.

  The outer kiln (1) has a cylindrical shape and is arranged with the axial direction as the vertical direction. The outer kiln (1) has an upper end opened to provide an upper end opening (11), and an outer kiln hot air inlet (13) penetrating the bottom wall (12) is provided at the center of the bottom wall (12). It is done.

  The inner kiln (3) is arranged inside the outer kiln (1). This inner kiln (3) has a cylindrical shape that is slightly smaller than the outer kiln (1), and is arranged with the axial direction as the vertical direction. Further, a gap is formed between the outer kiln (1) and the inner kiln (3), and this gap is configured as an outer peripheral hot air passage (6). The outer peripheral hot air passage (6) is formed in the entire outer periphery and bottom of the inner kiln (3). In addition, the outer kiln hot air inlet (13) of the outer kiln (1) communicates with the outer peripheral hot air passage (6).

  Further, the inner kiln (3) is configured as a charcoal baking chamber (30), and the upper end is opened to provide an upper end opening (31). Further, the inner kiln (3) is provided with an inner kiln hot air inlet (33) at the center of the bottom wall (32), and an inlet opening / closing plate (35) is provided at the inlet (33) so as to be freely opened and closed. Yes. The inlet opening / closing plate (35) is configured to be opened and closed by an operation from outside the kiln via an operating means (not shown).

  Near the bottom wall in the inner kiln (3), a charcoal support member (37) made of a wire mesh or the like is provided, and charcoal materials such as bamboo grove (30) stored in the charcoal baking chamber (30) in the inner kiln (3) ( As B) is supported by the support member (37), an exhaust chamber (36) is formed between the support member (37) and the bottom surface of the inner kiln (3).

  An upper lid (2) is provided at the upper end opening (11) of the outer kiln (1). The upper lid (2) is attached to the outer kiln (1) so as to be movable up and down. That is, the bracket (71) is attached to the upper end of the outer peripheral wall of the outer kiln (1) so as to protrude inward. A bolt (73) is attached to the bracket (71) along a vertical direction via a nut (72), and an upper lid (2) is attached to the lower end of the bolt (73). By rotating the nut (72) and moving the bolt (73) up and down, the upper lid (2) can be moved up and down while maintaining the horizontal state. In the present embodiment, a plurality of upper lid lifting means including a bracket (71), nuts (72), bolts (73), and the like may be provided on the upper lid (2) at predetermined intervals along the circumferential direction. .

  In the present embodiment, as described above, the gap (hot air introduction gap 8) is opened between the upper lid (2) and the upper end opening edge (31a) of the inner kiln (3) by moving the upper lid (2) up and down. The degree can be adjusted. For this reason, for example, in a state where the upper lid (2) is raised, a large gap (S) is formed between the upper lid (2) and the upper end edge (31a) of the inner kiln, and the large gap (S) is increased. A large amount of hot air is introduced from the outer peripheral hot air passage (6) into the inner kiln (3). Furthermore, in a state where the upper lid (2) is lowered by a small amount, the gap (S) between the upper lid (2) and the upper end edge (31a) of the inner kiln becomes small, and through the small gap (S), A small amount of hot air (air) is introduced from the outer peripheral hot air passage (6) into the inner kiln (3). Furthermore, in a state where the upper lid (2) is sufficiently lowered, the upper lid (2) is joined to the upper kiln upper end opening edge (31a), thereby eliminating (blocking) the gap (S) between the two. Introduction of hot air from the outer peripheral hot air passage (6) into the inner kiln (3) is prevented.

  In this embodiment, the upper part of the charcoal baking chamber (30), that is, the space between the upper lid (2) and the inner kiln (3) is configured as a dummy material installation space, and when charcoal baking is started as will be described later. The dummy material (D) is arranged in the installation space.

  The upper lid (2) is configured to be completely removable from the outer kiln (1) by removing, for example, the bracket (71), the nut (72), and the bolt (73).

  A hot air outlet (23) is provided at the center of the upper lid (2), and an outlet opening / closing plate (25) is provided at the outlet (23) so as to be freely opened and closed.

  A chimney tube (4) is attached to the discharge opening / closing plate (25) so as to penetrate the plate. The chimney tube (4) is disposed along the vertical direction, the lower end opening is disposed opposite to the carbonaceous material support member (37) in the inner kiln (3), and the upper end opening is the upper lid (2). ) Above.

  On the other hand, the heating chamber (5) communicates with the outer peripheral hot air passage (6) in the outer kiln (1) via the outer kiln hot air inlet (13) in the outer kiln (1). Furthermore, the opening (51) is provided in the one end part of the heating chamber (5).

  Moreover, while the lower end of a bypass flue pipe (9) is arrange | positioned in the other end part (back part) in a heating chamber (5), the upper end of the flue pipe (9) is an outer peripheral wall of a heating chamber (5) Is disposed outside.

  As shown in FIGS. 1 and 2, the outer peripheral portion of the outer kiln (1) is covered with a heat insulating clay material (10) except for necessary portions such as an upper lid (2) and a spout (51). Yes.

  In the charcoal kiln of the present embodiment configured as described above, when starting charcoal burning, a charcoal material (B) such as bamboo grove is set in the charcoal baking chamber (30). That is, with the top lid (2) removed and the upper end opening (31) of the inner kiln (3) opened upward, the charcoal material (B) from the opening (31) into the charcoal baking chamber (30) ( 4) Arrange many in a vertical position so that they line up around. Further, a large number of upper filling materials (dummy materials D), which are also made of bamboo forest, etc., are placed horizontally above the carbonaceous material (B).

  Subsequently, the upper lid (2) is set. At this time, as shown in FIG. 3, the upper lid (2) is arranged at the raised position to form a large hot air introduction gap (S) between the upper lid (2) and the upper end edge (31a) of the inner kiln. Keep it. The hot air outlet (23) of the upper lid (2) and the inner kiln hot air inlet (33) of the inner kiln bottom wall (32) are closed by the open / close plates (25) and (35).

  In this state, charcoal grilling is started. In the present embodiment, charcoal grilling is basically composed of three processes: a heating process (firewood process), a curing process, and a sealing process (cooling process).

  First, in the heat treatment, fuel such as soot put in the heating chamber (5) is ignited and burned, and heat is supplied from the heating chamber (5) into the kiln. Accordingly, hot air (H) such as a flame heat flow is introduced from the heating chamber (5) to the outer peripheral hot air passage (6) in the outer kiln (1) through the outer kiln hot air inlet (13). The hot air (H) introduced into the outer peripheral hot air passage (6) rises up the outer peripheral hot air passage (6) along the outer peripheral surface of the inner kiln (3), and hot air from the upper end of the outer peripheral hot air passage (6). It is introduced into the charcoal baking chamber (30) side through the passage introduction gap (S). The hot air (H) thus introduced to the charcoal baking chamber (30) side passes through the dummy material (D) and the charcoal material (B) and is introduced into the exhaust chamber (36) at the lower end of the charcoal baking chamber. 4) It is discharged to the outside through.

  Here, in this embodiment, since the dummy material (D) is arrange | positioned at the upper part of a charcoal baking chamber (30), a hot air (H) is introduce | transduced from the outer periphery hot air path (6) to the upper part of a charcoal baking chamber (30). Then, the dummy material (D) is ignited and generates heat. Thus, the carbonaceous material (B) is heated in a well-balanced manner from the entire upper area by the heat generated from the dummy material (D), and the carbonaceous material (B) is heated to a high temperature with a well-balanced and uniform temperature distribution. Moreover, since the inner kiln (3) is also heated from the outer periphery by hot air (H) passing through the outer peripheral hot air passage (6), heat diffusion and uneven heat in the charcoal baking chamber (30) is effectively prevented, The entire area of the chamber (30) is reliably maintained with a uniform temperature distribution. In this way, the carbonaceous material (B) is heated to a high temperature with a well-balanced and uniform temperature distribution, whereby a stable heat treatment is performed.

  In this embodiment, immediately after the start of the heat treatment, a large amount of hot air (H) can be introduced into the charcoal baking chamber (30) at a stretch and the heat treatment can be performed efficiently. That is, before the hot air (H) is fully introduced into the charcoal baking chamber (30), the bypass flue pipe (9) is opened in advance and a large amount of air is circulated in the heating chamber (5). ) Burn the soot inside. In the state where the soot is sufficiently burned, the bypass flue pipe (9) is closed so that the hot air (H) in the heating chamber (5) is blown through the outer peripheral hot air passage (6) at once. It is something to be introduced in. Accordingly, a large amount of hot air (H) can be introduced into the charcoal baking chamber (30) immediately after the start of the heat treatment, and the heat treatment can be performed efficiently.

  When the heat treatment has been performed for about 2 hours, as shown in FIG. 4, the discharge port opening / closing plate (25) of the upper lid (2) is opened to open the hot air discharge port (23). Thereby, the hot air (H) introduced into the dummy material (D) from the outer peripheral hot air passage (6) suddenly spreads over the entire area of the dummy material (D), and the entire dummy material (D) is reliably ignited ( Heating time shortening process). This heating time shortening process is performed for about 30 minutes.

  Subsequently, as shown in FIG. 5, the hot air outlet (23) of the upper lid (2) is closed by the opening / closing plate (25), and then the heating from the heating chamber (5) is stopped. Further, the upper lid (2) is lowered by a predetermined amount, the hot air introduction gap (S) between the upper lid (2) and the inner kiln upper end opening edge (31a) is set small, and into the charcoal baking chamber (30). Limit the introduction amount of hot air (H) to a small amount (curing treatment).

  In this curing process, carbonization proceeds in parallel with the pyrolysis of the carbonaceous material (B) in the charcoal baking chamber (30). At this time, the inside of the charcoal baking chamber (30) is maintained at a high temperature by the heat generated with the thermal decomposition of the carbonaceous material (B).

  In the present embodiment, it is possible to apply heat to the inner kiln (3) during the curing process and maintain the temperature at a high temperature. That is, during the curing process, the bypass flue pipe (9) is opened to burn the soot in the heating chamber (5), and the heat generated by the combustion is transferred to the inner kiln (3) via the outer peripheral hot air channel (6). Thus, the inner kiln (3) can be maintained at a high temperature. Therefore, the temperature reduction of the charcoal baking chamber (30) can be effectively prevented, and the pyrolysis (curing treatment) of the charcoal material (B) can be performed efficiently.

  After sufficient curing treatment (after about 8 hours), scouring treatment (aiming treatment) is performed for about 20 minutes. That is, as shown in FIG. 6, the inner kiln hot air inlet (33) of the bottom wall (32) in the inner kiln (3) is opened, and the hot air outlet (23) of the upper lid (2) is opened. Thereby, a large amount of air is supplied into the charcoal baking chamber (30), and the volatile gas generated from the charcoal material (B) is burned, so that the carbon material surface temperature is increased in a short time and surface treatment is performed.

  After the scouring process is completed, the charcoal baking chamber (30) is sealed as shown in FIG. 7 to cool the carbonaceous material (B) (cooling process). That is, the inner kiln hot air inlet (33) of the bottom wall (32) of the inner kiln (3) is closed by the opening / closing plate (34), and the hot air outlet (23) of the upper lid (2) is closed by the closing plate (24). Block. Further, the upper lid (2) is lowered until it is joined to the inner kiln upper end opening edge (31a), the gap (8) between the upper lid (2) and the inner kiln opening edge (31a) is closed, and the chimney tube ( The upper end opening of 4) is closed by a closing plate (44). As a result, the carbonaceous material (B) is cooled and carbonized in an oxygen-free state. This cooling process is performed for about 2 days (48 hours).

  And after a cooling process is completed, an upper cover (2) is removed, the upper end opening (31) of an inner kiln (3) is opened, and bamboo charcoal is taken out. This produces bamboo charcoal.

  As described above, according to the charcoal-fired kiln of the present embodiment, the outer peripheral hot air passage (6) is provided on the outer periphery of the inner kiln (3). By preventing diffusion and uneven heat, heat treatment and curing treatment of bamboo forest (B) in the inner kiln (3) can be performed at high temperature and evenly, ensuring high-quality bamboo charcoal (charcoal) efficiently and reliably. Obtainable.

  Furthermore, in this embodiment, since the upper lid (2) is moved up and down to adjust the opening degree of the hot air introduction gap (8) between the upper lid (2) and the inner kiln (3), the upper lid (2) The amount of hot air introduced into the inner kiln (3) can be easily adjusted only by the lifting operation. In other words, simply by raising and lowering the upper lid (2), the transition operation between the heat treatment, curing treatment and cooling treatment can be performed easily and reliably, improving workability, and making bamboo charcoal easier. Can be manufactured.

  Furthermore, the charcoal-fired kiln of the present embodiment is basically a structure in which the inner kiln (2) is simply arranged in the outer kiln (1), and the structure is simple, which can reduce the number of kiln production days and production costs. it can.

  Moreover, in this embodiment, since the bypass flue pipe (9) for discharging the hot air of the heating chamber (5) directly to the outside is provided, the heat treatment and the curing treatment can be performed efficiently. That is, when performing the heat treatment, by opening the bypass flue pipe (9) in advance and sufficiently burning the soot in the heating chamber (5), hot air (H) in the heating chamber (5) is generated. It can introduce | transduce into a charcoal baking room (30) at once, and can heat-process efficiently. Furthermore, the inner kiln (3) can be heated by opening the bypass flue pipe (9) and burning the soot in the heating chamber (5) during the curing process, and the charcoal baking chamber (30) is heated to a high temperature. It can be maintained and curing treatment can be performed efficiently.

  Moreover, in this embodiment, while providing a hot air discharge port (23) in an upper cover (2) and opening and closing the discharge port (23) with an opening-and-closing plate (25), it is provided in an inner kiln bottom wall (32). Since the inner kiln hot air inlet (33) is provided and the inlet (33) can be opened and closed by the opening / closing plate (35), the heat treatment and the scouring treatment can be performed efficiently and smoothly. That is, by opening the hot air outlet (23) of the upper lid (2) at the end of the heat treatment, the hot air (H) introduced into the dummy material (D) from the outer peripheral hot air path (6) is changed to the dummy material (D). The entire area of the dummy material (D) is ignited smoothly, and the heat treatment can be performed efficiently. Furthermore, a large amount of air is supplied into the charcoal baking chamber (30) by opening the inner kiln hot air inlet (33) of the inner kiln bottom wall (32) and the hot air outlet (23) of the upper lid (2) after the curing treatment. And since the volatile gas produced from a carbonaceous material (B) can be burned reliably, a scouring process can be performed reliably.

  Further, in the present embodiment, the dummy material (D) is disposed on the carbonaceous material (B), the dummy material (D) is caused to burn and generate heat, and the thermal decomposition of the carbonaceous material (B) is started. The pyrolysis of the carbonaceous material (B) proceeds in a balanced manner, and high-quality bamboo charcoal can be obtained efficiently.

  Furthermore, the amount of air (hot air) supplied to the charcoal baking chamber (30) can be adjusted appropriately by lowering the upper lid (2) according to the burning shrinkage of the dummy material (D), and curing and cooling treatments can be performed. It can be done easily and accurately.

  Moreover, in this embodiment, it is also possible to comprise so that an inner kiln (3) may be taken out from an outer kiln (1). In this case, workability at the time of putting in and out the carbonaceous material (B) can be improved by taking out and putting the carbonaceous material (B) into and out of the inner kiln (3) in a state where the inner kiln (3) is taken out to the outside. it can.

  Also, for one charcoal kiln, a plurality of inner kilns (3) are prepared (a spare inner kiln is prepared), and after charcoal baking, the inner kiln (3) is taken out and cooled while another Since charcoal baking can be performed using a (spare) internal kiln, production efficiency can be improved.

  In the present embodiment, the wood vinegar liquid (bamboo vinegar liquid) generated during charcoal baking may be collected, and the wood vinegar liquid (bamboo vinegar liquid) may be used effectively.

  In the above embodiment, the upper lid can be lifted and lowered using bolts and nuts. However, the present invention is not limited to this, and any means that can lift and lower the upper lid is adopted in the present invention. Can do.

<Example>
An iron charcoal kiln configured similarly to the embodiment shown in FIGS. 1 and 2 was prepared. At this time, the inner kiln (3) used was a cylindrical one having a diameter of 600 mm and a height of 550 mm.

  In the inner kiln (3), the carbonaceous material (B) and the dummy material (D) made of bamboo were packed in the same manner as described above.

  And in accordance with the above embodiment, heat treatment (about 2 hours), heat time shortening treatment (about 30 minutes), curing treatment (about 8 hours), scouring treatment (about 20 minutes) and sealing treatment (about 48 hours) To make bamboo charcoal.

  In this production, the yield was 90%, and high production efficiency could be obtained. Furthermore, when the electric resistance value of the manufactured bamboo charcoal was measured, all were 300Ω or less, and bamboo charcoal having a low electric resistance value, that is, good quality bamboo charcoal having a high carbonization rate could be obtained.

  For reference, most of the commercially available bamboo charcoal has a resistance value of several mega Ω to several thousand Ω, and even a good quality is about several hundred Ω.

  As described above, in the charcoal kiln related to the present invention, high quality bamboo charcoal having a low electric resistance value could be obtained efficiently.

  The present invention can be suitably used as a charcoal kiln when producing charcoal, particularly bamboo charcoal.

It is front sectional drawing which shows the charcoal-baking kiln which is embodiment of this invention. It is side surface sectional drawing which shows the charcoal kiln of the said embodiment. It is a schematic sectional drawing which shows the charcoal kiln of embodiment in the state at the time of heat processing. It is a schematic sectional drawing which shows the charcoal kiln of embodiment in the state at the time of a heating time shortening process. It is a schematic sectional drawing which shows the charcoal kiln of embodiment in the state at the time of curing treatment. It is a schematic sectional drawing which shows the charcoal kiln of embodiment in the state at the time of a scouring process. It is a schematic sectional drawing which shows the charcoal kiln of embodiment in the state at the time of a sealing process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Outer kiln cover 11 ... Upper end opening 12 ... Bottom wall 13 ... Outer kiln hot air inlet 2 ... Upper lid 23 ... Hot air outlet 25 ... Outlet opening / closing plate 3 ... Inner kiln 30 ... Charcoal baking chamber 31 ... Upper end opening 31a ... Upper end opening Edge 32 ... Bottom wall 33 ... Inner kiln hot air inlet 35 ... Inlet opening / closing plate 4 ... Chimney tube 5 ... Heating chamber 6 ... Outer hot air passage 8 ... Hot air introduction gap 9 ... Bypass flue pipe B ... Carbon material (wood) , Bamboo)
H ... Hot air

Claims (4)

An outer kiln having an opening at the upper end and an outer kiln hot air inlet on the bottom wall;
An upper lid attached to the upper end opening of the outer kiln;
An inner kiln arranged in the outer kiln and configured as a charcoal firing chamber;
A chimney tube having a lower end disposed in the charcoal baking chamber and an upper end penetrating the upper lid and disposed outside,
An outer peripheral hot air passage provided between the outer kiln and the inner kiln, into which hot air is introduced from the outer kiln hot air inlet;
The degree of opening in the gap (hot air introduction gap) between the upper lid and the upper end opening edge of the inner kiln by raising and lowering the upper lid and moving the upper lid to and away from the upper end opening edge of the inner kiln. Is configured to be adjustable,
In the state where the hot air introduction gap is opened, the hot air introduced into the outer peripheral hot air passage is introduced into the inner kiln through the hot air introduction gap, and the hot air is discharged to the outside through the chimney tube. While
A charcoal kiln configured to adjust the amount of hot air introduced from the outer peripheral hot air passage into the inner kiln according to the degree of opening of the hot air introduction gap. A heating chamber is provided below the outer kiln, and hot air is configured to be introduced into the outer peripheral hot air path from the heating chamber via the outer kiln hot air inlet.
The charcoal-fired kiln according to claim 1, wherein a bypass flue pipe is provided in the heating chamber to discharge hot air in the chamber directly to the outside.   The charcoal-baking kiln according to claim 1 or 2, wherein a hot air outlet for discharging hot air in the inner kiln to the outside is provided on the upper lid, and an outlet opening / closing plate is provided at the hot air outlet so as to be freely opened and closed.   The inner wall of the inner kiln is provided with an inner kiln hot air inlet corresponding to the outer kiln hot air inlet, and an inlet opening / closing plate is provided at the inner kiln hot air inlet so as to be freely opened and closed. The charcoal-grilling kiln of any one of these.

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