JP3153809U - Cremation furnace - Google Patents

Abstract

A cremation furnace capable of significantly reducing the generation of smoke by obtaining an appropriate combustion state according to the type and size of a cremation object. An air jacket (30) for forming air layers (34A, 34B) divided vertically is provided around the outer wall of the furnace (12) on the outside of the furnace (12) provided with a charging port (12) and an exhaust port (24). The inlet 12 is provided with an openable / closable door 40 having a window and a door, and a chimney 36 is connected to the exhaust outlet 24. A blower 110 and a burner 130 are provided on the back side of the air jacket 30. The blower 110 is connected to air supply pipes 116 and 118 including dampers 120 and 122, and the air supply pipes 116 and 118 are connected to the air layers 34A and 34B. By adjusting the amount of air supplied to the air layers 34A, 34B, an appropriate combustion state corresponding to the cremation object 150 can be obtained, and the generation of smoke can be greatly reduced. [Selection] Figure 2

Description

  The present invention relates to a cremation furnace for cremation of, for example, pets (pet animals), livestock, and people.

  In recent years, pets have been increasingly cremated in the same way as humans, such as cremation grounds and mobile cremation vehicles. For example, in Patent Document 1 below, an incinerator having a door at the rear is installed in the middle of a box-type cargo bed having a door at the rear, and a rail is provided from the inside of the furnace to the rear part of the cargo bed. A carriage that constitutes the furnace bottom of the furnace is movably supported above, and a partition is provided between the rear part of the furnace and the ceiling and side walls of the cargo bed, and the rear part of the cargo bed from the partition is a ritual chamber An animal cremation car is disclosed.

Utility Model Registration No. 3084360

  However, the background art described in Patent Document 1 described above has the following disadvantages. First, the burner mounting angle is adjusted so that the direction of the burner's fire can be adjusted for small animals and large animals. However, the intake of air to assist combustion is along the lower end of the combustion chamber. It is made of a blower tube embedded in the air. In other words, since air is supplied to a position where the incineration object is present, the thermal decomposition of the incineration object is promoted, but the upper layer air necessary for the combustion reaction is insufficient, and incomplete combustion is caused and smoke is likely to be generated. There is an inconvenience. In addition, since the combustion gas in the furnace emits a strong odor without being completely burned, the exhaust gas is discharged from the chimney after being led to the secondary combustion chamber and completely burned by the secondary burner, resulting in a complicated structure. There is also an inconvenience.

  The present invention focuses on the above points, and provides a cremation furnace that can significantly reduce the generation of smoke by obtaining an appropriate combustion state according to the type and size of the cremation object. That is the purpose.

  The present invention has an inlet for taking in and out a cremation object placed on a carriage, an exhaust outlet for discharging combustion gas, a furnace made of refractory material, and a first for opening and closing the inlet. 1 door, heating means for heating the inside of the furnace, the outer wall of the furnace is covered except for the inlet and the exhaust port, and an air layer is formed between the outer wall and the air layer in the height direction. An air jacket divided into a plurality of stages, a blower, an air supply pipe connecting each stage of the blower and a plurality of air layers of the air jacket, and a damper provided in each of the plurality of air supply pipes The air supply means is formed on at least one wall surface of the furnace, and includes an air injection port that penetrates the wall surface and connects the inside of the furnace and the air layer.

One of the main forms is characterized in that the air injection port is formed in the wall surface at 10 or more locations per 1 m ^{2 and} has a diameter of 1 to 20 mm. Another embodiment is characterized in that it comprises an adjusting means for changing the position of the heating means or the direction of the flame injected from the heating means. Still another embodiment is characterized in that a first opening / closing mechanism for opening / closing the first door is provided so that the insertion port can be sealed when the first door is closed. Still another embodiment is provided in the first door, and is a window for inspecting the inside of the furnace, a second door that can be opened and closed with respect to the window, and a door for opening and closing the second door. A second opening / closing mechanism is provided. The above and other objects, features, and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

  According to the present invention, at least one wall surface of a refractory furnace provided with an air jacket for forming a plurality of layers of air layers around the outer wall, the furnace interior and the air layer are passed through the wall surface. An air outlet to be connected was provided. And the amount of air adjusted for each air layer of multiple stages is supplied by the air supply means, and the appropriate combustion state is obtained according to the type and size of the cremation object, greatly reducing the generation of smoke A possible cremation furnace can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Example 1 of this invention, (A) is an external appearance perspective view, (B) is a perspective view which shows a window, (C) is a perspective view which shows the inside of a furnace, (D) shows a modification. FIG. Fig. 1 (A) is a cross-sectional view taken along line # A- # A and viewed in the direction of the arrow, (A) is a view showing the door opened, and (B) is a state during cremation. FIG.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  First, Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. 1A is an external perspective view of the cremation furnace of this embodiment, FIG. 1B is a perspective view showing a window, FIG. 1C is a perspective view showing the interior of the furnace, and FIG. FIG. FIG. 2 is a cross-sectional view of FIG. 1A cut along line # A- # A and viewed in the direction of the arrow, (A) is a view showing the door opened, and (B) is cremation. It is a figure which shows the mode inside. The cremation furnace of the present embodiment is for cremation of a cremation object such as a pet, for example, and is a stationary type as shown in FIGS. 1 (A), 2 (A) and 2 (B). . The cremation furnace 10 of the present embodiment is configured by a furnace 12, an air jacket 30, a door 40, a blower 110, a burner 130, and the like that cover the outside and form an air layer.

  The furnace 12 is made of, for example, a refractory material (irregular refractory material) such as refractory concrete, and has a pair of side surfaces 12A and 12B, an upper surface 12C, and a back surface 12D. It is a cart 14 for loading. The front side of the furnace 12 is formed as an inlet 22 for taking in and out the cremation object 150 placed on the carriage 14, and the upper surface 12C has an exhaust for exhausting combustion gas. A mouth 24 is formed, and a substantially oval opening 26 into which a nozzle 132 of a burner 130 described later is inserted is formed on the back surface 12D. A metal coating may be provided on the outer surface of the furnace 12 except for the charging port 22, the exhaust port 24, and the opening 26. A hole corresponding to an air injection port 28 described later is formed in the metal coating.

  As shown in FIG. 1 (C), the carriage 14 can be stored in a frame 18 formed on the bottom surface side of the furnace 12, and along a rail 20 formed on a bottom surface 30E of an air jacket 30 described later. By sliding, the cremation object 150 can be taken in and out from the insertion port 22. On the front side of the carriage 14, a recess 16 is formed for hooking the tip of a jig (for example, see the jig 166 in FIG. 1D) used when the carriage 14 is pulled out of the furnace 12. . The exhaust port 24 is connected with a chimney 36 for exhausting combustion gas. The chimney 36 has a structure in which the outside of a refractory material 38A such as refractory concrete is covered with a metal plate 38B such as an iron plate, and a cover (not shown) is put on the opening when not in use. In use, the cover is removed and used as it is, or in some cases, it is connected to the duct 39 as shown in FIG.

The periphery of the outer wall of the furnace 12 having the above structure is covered with an air jacket 30 except for the inlet port 22 and the exhaust port 24, and an air layer is formed between the outer wall and the outer wall. The air jacket 30 has side surfaces 30A and 30B, an upper surface 30C, a back surface 30D, and a bottom surface 30E, and is made of a metal plate such as an iron plate, for example. In the illustrated example, the partition 32 divides the air layer into an upper air layer 34A and a lower air layer 34B. Here, a plurality of air injection holes 28 are formed through the side surfaces 12A and 12B, the upper surface 12C, and the rear surface 12D of the furnace 12, and the upper and lower air layers 34A and 34B and the inside of the furnace 12 are formed. Connected. By injecting the air in the air layers 34A and 34B into the furnace 12 through the air injection port 28, the air necessary for combustion is supplied into the furnace 12, and the temperature rise of the furnace 12 is suppressed. Can do. The air injection port 28 has a diameter set in a range of 1 to 20 mm, and 10 or more locations are provided per 1 m ² of the wall surface on each wall surface.

  The door 40 for opening and closing the charging port 22 of the furnace 12 includes a door main body 42, a pair of horizontal frames 48A and 48B, vertical frames 48C and 48D, a handle 76, and the like provided on the surface thereof. As shown in FIGS. 2A and 2B, the door main body 42 has a structure in which a metal plate 46 such as an iron plate is provided on the surface of a refractory material 44 such as refractory concrete. Is formed with an inspection window 78 used for confirming the inside of the furnace 12. The horizontal frames 48A and 48B are attached substantially in the vicinity of the upper edge and the lower edge of the door main body 42, and are connected by a pair of vertical frames 48C and 48D substantially orthogonal to the horizontal frames 48A and 48B. . The horizontal frames 48A and 48B have both end portions protruding outward from the door body 42 and a groove 50 at the end portion.

  Further, a connecting member 52A is attached to a substantially central portion of the upper horizontal frame 48A, and the connecting member 52A is substantially horizontal through another connecting member 52B provided on the upper edge of the door body 42. It is connected to the support member 54 supported by. A bearing 56 is provided at a substantially central portion of the support member 54, and a shaft 58 is rotatably supported by the bearing 56. On the other hand, a fixing member 60 is provided at one end on the front side of the air jacket upper surface 30C, and a substantially triangular arm 64 is rotatably attached to the fixing member 60 via a shaft 62. ing. Furthermore, a bearing 66 is provided at the tip of the arm 64, and the shaft 58 is rotatably supported by the bearing 66. That is, the door 40 can be opened and closed with respect to the charging port 22 of the furnace 12 by turning about the shafts 58 and 62.

  In addition, on the upper side and the lower side of the front side of the side surfaces 30A and 30B of the air jacket 30, lock devices 70 are provided at positions corresponding to the horizontal frames 48A and 48B, respectively. The locking device 70 includes a bar 72 that is rotatable with respect to the side surfaces 30A and 30B. The bar 72 is rotated as indicated by an arrow in FIG. By engaging the flange portions 74 provided on the two sides with the grooves 50 at both ends of the lateral frames 48A, 48B, the door 40 can be locked in a closed state. When the door 40 is opened and closed by such a mechanism, the gap is reduced as compared with the case where the one end side of the door is opened and closed by a hinge or the like, and air leakage can be reduced to improve the sealing performance. Moreover, you may make it improve sealing property further by providing packing etc. as needed.

  The door 40 is provided with the inspection window 78 as described above and can be opened and closed by the door 86. As shown in FIG. 1B, the window 78 is provided with an edge 80 projecting to the front side, and is fixed to one short side (right edge in the illustrated example) of the edge 80. A portion 82 is provided, and a pin 83 is provided on the other short side (left edge in the illustrated example). The door 86 includes a refractory material 88 that fits inside the edge 80, a cover 90 that covers the outside of the edge 80, a pair of frames 92 </ b> A and 92 </ b> B provided on the surface of the cover 90, It is configured by a substantially L-shaped lever 94. One end side (right side in the illustrated example) of the pair of frames 92A and 92B is rotatably attached to the fixing portion 82 via a shaft 84, and the other end side (left side in the illustrated example). ), A refraction portion of the lever 94 is rotatably attached via a shaft 96. In the lever 94, the end 98 on the long side serves as a grip portion, and the end 100 on the short side serves as an engaging portion related to the pin 83. When opening the door 86 in the state of FIG. 1 (A), first, the lever 94 is operated to remove the end portion 100 from the pin 83 and further to the lever until it is opened to the state shown in FIG. 1 (B). Draw 94.

  Next, the air supply mechanism will be described. The air supply mechanism includes a blower 110 provided on the back surface 30D side of the air jacket 30, a duct 112 connected to the blower 110, a distribution hood 114 that distributes air sent from the duct 112, the distribution hood 114, and an upper portion. The air supply pipe 116 for connecting the air layer 34A, the air supply pipe 118 for connecting the distribution hood 114 and the lower air layer 34B, and the dampers 120 and 122 provided in the air supply pipes 116A and 118. . By adjusting the amount of air supplied to the air layers 34A and 34B by the dampers 120 and 122, the amount of air injected into the furnace 12 can be adjusted according to the height, and the combustion state can be optimally adjusted.

  Further, a burner 130 as a heating means is provided on the back surface 30D of the air jacket 30. The burner 130 heats the inside of the furnace 12 and is also used as an ignition source when the cremation object 150 housed therein is first burned. The air jacket back surface 30D is provided with a cylindrical portion 128 having a substantially oval cross section that penetrates the back surface 30D and is connected at one end to an opening 26 provided in the back surface 12D of the furnace 12. A fixed plate 134A is fixed to the other end side of the cylindrical portion 128, and a slide plate 134B that is slidable along the main surface is provided on the fixed plate 134A. The fixed plate 134A has an opening corresponding to the cylindrical portion 128, and the burner 130 is attached to the slide plate 134B. The slide of the slide plate 134B with respect to the fixed plate 134A is guided by a well-known guide means (not shown) (for example, a groove and a pin that slides along the groove). In addition, a fixing member 135 is provided on the upper end side of the slide plate 134B, and one end side of a link 136 that is rotatable about the shaft 138A is attached to the fixing member 135. On the other end side of the link 136, an end portion of an operation lever 140 is attached to be rotatable about the shaft 138B.

  A guide frame 144 is attached to the bending portion of the lever 140 via a shaft 142. Regardless of whether or not the lever 140 is operated, the guide frame 144 is engaged with the upper end side of the fixed plate 134A, and the distance between the shaft 142 and the fixed plate 134A is kept constant. Therefore, when the lever 140 is rotated from the position indicated by the solid line in FIG. 2B to the position indicated by the dotted line with the shaft 142 as a fulcrum, the slide plate 134B is pulled up as the link 136 rotates. As a result, the burner 130 is raised from the position PA to the position PB. When the lever 140 is returned to the position indicated by the solid line, the burner 130 returns from the position PB to the position PA. That is, in the present embodiment, the height of the burner 130 can be adjusted between the position PA and the position PB. The burner 130 may be fixed at an arbitrary position between the position PA and the position PB by a stopper means (not shown).

  <Basic cremation procedure> Next, an example of a basic cremation procedure by the cremation furnace 10 of the present embodiment will be shown. As described above, the height of the burner 130 can be adjusted, but here, the description will be made assuming that processing is performed while maintaining a certain height. First, the door 40 is opened, a rail (for example, see the rail 162 in FIG. 1D) is set on the bottom of the insertion port 22, and the carriage 14 is pulled out. Next, the cremation object 150 such as an animal body is placed in the center of the carriage 14, and the carriage 14 is returned to the furnace 12. Then, the rail is removed, the door 40 is closed, and the lock tool 70 is locked to complete the setting. Next, a cover (not shown) of the chimney 36 is opened and connected to the duct 39 as necessary. Then, a timer switch (not shown) is set to a predetermined time (for example, 2 hours), and the operation of the blower 110 is started. Further, the blower 130 is turned on, and then the combustion switch of the burner 130 is turned on to start cremation. To do.

  The air introduced from the blower 110 into the air layers 34A and 34B through the duct 112, the distribution hood 114, and the air supply pipes 116 and 118 is the wall surface of the furnace 12 (in the illustrated example, the side surfaces 12A and 12B, the upper surface 12C and It is injected into the furnace 12 through an air injection port 28 formed on the back surface 12D). At this time, the amount of air supplied to the upper and lower layers in the furnace 12 is adjusted by adjusting the amount of air supplied to the air layers 34A and 34B by the dampers 120 and 122 provided in the air supply pipes 116 and 118. can do. For this reason, the amount of air necessary for combustion can be supplied according to the size of the cremation object 150 and completely burned to greatly reduce the generation of smoke. For example, depending on the solid difference of the cremation object 150, the thermal decomposition rate may be too fast, and incomplete combustion may occur. In this case, the thermal decomposition rate is slowed (the damper 122 for adjusting the lower combustion air is used). Or by increasing the amount of air in the reaction zone of the pyrolysis gas and oxygen (opening the damper 120 for adjusting the upper combustion air), it is possible to cope with the case where smoke is generated due to incomplete combustion. If too much air for combustion is added, the temperature in the furnace 12 may be lowered to cause a combustion failure.

  Cremation ends at the set timer time. Alternatively, during the above process, the door 86 is opened and the cremation state is confirmed from the window 78. If the cremation is finished, the timer dial is returned to 0 and the process is ended. When performing the cooling operation, only the combustion switch of the burner 130 is turned off, and the cooling time is from that point to the timer time. When the cremation is completed after any progress, the blower and combustion switch of the burner 130 is returned to the “OFF” state, and the cover (not shown) of the chimney 36 is returned. If connected to the duct 39, the cover is attached after the duct 39 is removed. During the above-described cremation, it is necessary not to turn off the blower switch of the burner 130 in order to prevent the combustion heat of the cremation object 150 from flowing backward and causing damage to the burner 130.

Thus, according to the first embodiment, the following effects can be obtained.
(1) The wall of the refractory furnace 12 provided with the air jacket 30 for forming the upper and lower air layers 34A and 34B around the outer wall penetrates the wall and the inside of the furnace 12 and the air layers 34A and 34B. And 10 or more air injection ports 28 having a diameter of 1 to ²⁰ mm per 1 m ^{2 of the} wall surface. And since it decided to supply the air sent from the air blower 110 by the quantity adjusted for every air layer 34A, 34B, according to the kind and magnitude | size of the cremation object 150, a suitable combustion state is obtained and generation | occurrence | production of smoke Can be greatly reduced
(2) Since the outside air is always sent from the blower 110 to the air layers 34A and 34B of the air jacket 30, the air layers 34A and 34B become heat insulating layers, and the temperature rise of the outer wall of the furnace 12 can be suppressed.

  <Modification> The cremation furnace 10 of the present embodiment has high smokeless performance as described above, and therefore can be applied not only to a stationary type but also to a vehicle-mounted type. FIG. 1D shows an example of a vehicle-mounted type. As shown in the figure, the cremation furnace 10 is installed at the rear part of the car 160, and discharges combustion gas to the outside by connecting a duct 39 connected to the chimney 36 to the ceiling of the car 160. When the carriage 14 is pulled out of the furnace 12, the rail 162 is set on the stage 164 that matches the height of the car 160, and a jig 166 is hung on the concave portion 16 of the carriage 14 and pulled out along the rail 162. The operation after the cremation object 150 is set on the cart 14 and set in the cremation furnace 10 is the same as the basic cremation procedure described above.

  <Application example> Next, an application example of this embodiment will be described. In the above-described basic cremation procedure, the process is performed while maintaining the burner 130 at a constant height, and the good combustion state is maintained by adjusting the supply amount of combustion air at the upper part and the lower part, respectively. However, the height of the burner 130 may be adjusted during processing, or cremation may be performed while the combustion of the burner 130 is stopped. For example, when the cremation object 150 is small or when the calorific value of the cremation object 150 itself is low, the burner 130 is naturally necessary to compensate for this, but conversely, the cremation object 150 is too large, If there are too many components, the use of the burner 130 is counterproductive and may lead to the generation of black smoke. In this case, the amount of combustion air in the upper layer is increased to cope with the excessively generated pyrolysis gas, or the amount of air in the lower layer is reduced in order to suppress thermal decomposition, or combustion of the burner 130 is stopped, By performing a restraining operation such as adjusting the position, an effect equal to or greater than that obtained when performing cremation according to the basic cremation procedure described above can be obtained.

For example, an example of the operation required for each combustion step is as follows.
(a) Ignition: When the nozzle 132 of the burner 130 is at the highest position indicated by the position PB in FIG. 2 (B) at the time of ignition, and the cremation object 150 is located higher than the position of the burner 130 Since smoke tends to be generated, the dampers 120 and 122 are adjusted so that the air in the upper layer is increased and the lower layer is decreased.
(b) Continuation of combustion: At this stage where volatile components are mainly generated, combustion with less smoke generation is achieved by stopping the combustion of the burner 130 and performing only the blowing operation, due to the diffusion reaching effect of the combustion air. continue.
(c) Middle combustion stage: The position of the burner 130 is lowered between the position PB and the position PA. At this stage, since the generation of volatile components gradually decreases, the combustion by the burner 130 is resumed.

(d) Second half of combustion: The burner 130 is lowered to the lowest position PA, and the upper and lower combustion air injection quantities are reversed. At this stage, the generation of volatile components is reduced and the naturalness (continuation of automatic combustion) is reduced.
(e) Last half of combustion: Volatile components are reduced, and surface combustion of fixed carbon mainly occurs. The burning rate of surface combustion is very slow. At this stage, the amount of combustion air supplied is reduced for both the upper and lower layers to raise the ambient temperature.
(f) Combustion end and cooling operation: The combustion of the burner 130 is stopped and only the air blowing operation is performed. Maximize the supply of combustion air for both upper and lower layers. When the cooling is completed, both the blowing by the burner 130 and the blowing from the air injection port 28 are stopped.

In addition, this invention is not limited to the Example mentioned above, A various change can be added in the range which does not deviate from the summary of this invention. For example, the following are also included.
(1) The shape, size, and material of each part in the first embodiment are examples, and can be appropriately changed as necessary.
(2) In the first embodiment, the inner side of the air jacket 30 is divided into upper and lower two stages by the partition 32. However, this is also an example, and the number of divisions is divided into three or more stages as needed. You may change suitably. Further, in addition to the division in the height direction, the division in the width direction and the depth direction is not prevented.
(3) The position adjusting mechanism of the burner 130 shown in the first embodiment is also an example, and various known mechanisms may be applied as long as the same effect can be obtained. In the above embodiment, the height of the burner 130 itself is changed. However, a mechanism capable of adjusting the direction of the flame injected from the nozzle 132 may be used.

(4) The opening / closing mechanism of the doors 40 and 86 is also an example, and various known opening / closing mechanisms may be applied as long as the same effect can be obtained. Moreover, you may make it the structure which can open and close these doors 40 and 86 automatically.
(5) In the first embodiment, the air injection ports 28 are provided on the side surfaces 12A and 12B, the upper surface 12C, and the rear surface 12D of the furnace 12, but this is also an example, and may be provided on one or more of the side surfaces. That's fine. In addition, the number and diameter of the air injection ports 28 can be appropriately changed as necessary as long as they are within the above-described range.
(7) In the first embodiment, cremation of pets (competent animals) has been described as an example, but the cremation furnace of the present invention can also be applied to livestock such as chickens and pigs, wild animals, and human cremation. is there.

  According to the present invention, at least one wall surface of a refractory furnace provided with an air jacket for forming a plurality of air layers around the outer wall is connected to the interior of the furnace and the air layer through the wall surface. An air injection port is provided. And the air supply means can supply a controlled amount of air for each of the multiple air layers, and by obtaining an appropriate combustion state according to the type and size of the cremation object, the generation of smoke can be greatly reduced Therefore, it can be used for cremation furnaces. In particular, it is suitable for use in an on-vehicle cremation furnace such as for pets.

10: Cremation furnace 12: Furnace 12A, 12B: Side surface 12C: Upper surface 12D: Back surface 14: Bogie 16: Recess 18: Frame 20: Rail 22: Input port 24: Exhaust port 26: Opening portion 28: Air injection port 30: Air Jacket 30A, 30B: Side surface 30C: Top surface 30D: Back surface 30E: Bottom surface 32: Partition 34A, 34B: Air layer 36: Chimney 38A: Refractory material 38B: Metal plate 39: Duct 40: Door 42: Door main body 44: Refractory material 46 : Metal plate 48A, 48B: Horizontal frame 48C, 48D: Vertical frame 50: Groove 52A, 52B: Connecting member 54: Support member 56, 66: Bearing 58, 62: Shaft 60: Fixing member 64: Arm 70: Locking tool 72 : Bar 74: Flange part 76: Handle 78: Window 80: Edge part 82: Fixed part 83: Pin 84: Shaft 86: Door 88: Refractory material 0: Cover 92A, 92B: Frame 94: Lever 96: Shaft 98, 100: End 110: Blower 112: Duct 114: Distribution hood 116, 118: Air supply pipe 120, 122: Damper 128: Tube part 130: Burner 132 : Nozzle 134A: fixed plate 134B: slide plate 135: fixed member 136: link 138A, 138B: shaft 140: lever 142: shaft 144: guide frame 150: cremation object 160: car 162: rail 164: table 166: jig

Claims (5)

A furnace composed of a refractory material and having an inlet for taking in and out the cremation object placed on the carriage and an exhaust outlet for discharging combustion gas;
A first door for opening and closing the inlet;
Heating means for heating the inside of the furnace,
An air jacket that covers the outer wall of the furnace except the inlet and the exhaust port, forms an air layer between the outer wall and the air layer divided into a plurality of stages in the height direction,
An air supply means including a blower, an air supply pipe connecting each stage of the blower and the plurality of air layers of the air jacket, and a damper provided in each of the plurality of air supply pipes;
An air injection port which is formed on at least one wall surface of the furnace and connects the air layer and the inside of the furnace through the wall surface;
A cremation furnace characterized by comprising. ^2. The cremation furnace according to claim 1, wherein the air injection port is formed in the wall surface at 10 or more locations per 1 m ^{2 and} has a diameter of 1 to 20 mm. Adjusting means for changing the position of the heating means or the direction of the flame injected from the heating means;
The cremation furnace according to claim 1 or 2, further comprising: A first opening / closing mechanism that opens and closes the first door so that the inlet can be sealed when the first door is closed;
The cremation furnace as described in any one of Claims 1-3 characterized by the above-mentioned. A window provided on the first door for checking the inside of the furnace;
A second door that can be opened and closed with respect to the window;
A second opening / closing mechanism for opening / closing the second door;
The cremation furnace as described in any one of Claims 1-4 characterized by the above-mentioned.

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