JP2021025720A - Continuous heat treatment device - Google Patents

Abstract

To provide a continuous heat treatment device which can prevent the damage of the device when a rotary furnace is thermally expanded, and can suppress the wear of guide rollers.SOLUTION: A continuous heat treatment device includes a rotary furnace 100 for heat-treating a treated product while transferring it, and rotating with an axial core as a center, an annular frame body 120 arranged with a clearance at an external periphery of the rotary furnace 100, and a support part 130 for rotatably supporting the frame body 120. A fitment part 110 protruding toward an internal peripheral face of the frame body 120 is arranged at an external peripheral face of the rotary furnace 100, a fit part 124 which can be fit to the fitment part 110 is arranged at the internal peripheral face of the frame body 120, and a space part 115 for permitting the movement of the fitment part 110 in a radial direction of the rotary furnace 100 is formed between the fitment part 110 and the fit part 124.SELECTED DRAWING: Figure 1

Description

The present invention relates to a continuous heat treatment apparatus that dries, carbonizes, heat-decomposes, or otherwise treats rice husks, powders such as sawdust, wastes from ordinary households, and other wastes. The present invention relates to a continuous heat treatment apparatus for carbonizing waste to produce, for example, a carbonaceous material as a raw material for activated carbon.

Conventionally, as a device for carbonizing rice husks, powders such as sawdust, wastes from ordinary households, and other wastes (hereinafter, also referred to as carbonaceous materials), a rotary furnace that heat-treats while transferring carbonaceous materials has been used. , A device including a carbon material supply portion connected to one end side in the axial direction of the rotary furnace and a discharge portion connected to the other end side in the axial direction of the rotary furnace has been proposed.

In the carbonization apparatus having such a configuration, annular rail portions are welded and fixed to both ends of the rotary furnace, and guide rollers for rotatably supporting the rail portions are provided. Further, the rotary furnace is configured to be rotated by a drive device such as a motor, and by rotating the rotary furnace around its axis, the carbonaceous material supplied from the supply unit into the rotary furnace is heated while being agitated. It is configured to be sent to the discharge part side.

Therefore, in order to improve the sealing property between the rotary furnace and the supply unit, Patent Document 1 (Japanese Unexamined Patent Publication No. 2001-116460) describes the axial direction and the radial direction due to the deformation and thermal elongation of the rotary cylinder of the rotary furnace. A rotary furnace sealing device that can absorb displacement, has high reliability and safety, and can seal between the rotating portion and the stationary portion of the rotary furnace has been proposed.
The rotary furnace sealing device described in Patent Document 1 includes a rotary cylinder that rotates in a cylindrical shape, a housing that is arranged outside the rotary cylinder and through which the rotary cylinder penetrates, and a circumference of the rotary cylinder that is attached to the housing and rotates. In a rotary furnace sealing device provided with a packing box that surrounds the surface, a rotary seal member provided on the inner peripheral surface of the packing box, which is in sliding contact with the outer peripheral surface of the rotary cylinder to allow axial expansion and contraction of the rotary cylinder, and packing. It is configured to include an end face sealing member which is interposed in a mounting portion of the box to the housing and allows radial expansion and contraction of the rotating cylinder.

Further, in Patent Document 2 (Japanese Unexamined Patent Publication No. 9-72666), a large-diameter rotating body that is rotationally driven by a driving source and a fixing member in which a tubular body portion is located with a small gap around the large-diameter rotating body are described. An airtight device for a large-diameter rotating body that seals has been proposed.
The airtight device for a large-diameter rotating body described in Patent Document 2 has a tubular seal member attached to the periphery of the large-diameter rotating body at a position where the tubular portion of the fixing member is slightly removed via a blind plate portion. A seal with an annular sliding plate that has a metal fitting, a sliding surface that is attached to the vertical surface of the cylinder and has been surface-processed in advance, and whose axis is substantially aligned with the axis of the large-diameter rotating body. It is characterized in that one side thereof is attached to the member mounting bracket in a sealed state, and the other side has an elastic sealing member that opens like a trumpet and its end portion slides into contact with an annular sliding plate.

Further, in Patent Document 3 (Japanese Unexamined Patent Publication No. 2001-324272), in order to prevent gas from leaking in a rotary heat treatment device having a heat cylinder for heat-treating an object to be treated. A sealing means that completely blocks the sliding surface of the heated cylinder has been proposed.
In the rotary heat treatment apparatus described in Patent Document 3, the housings of the apparatus for supplying and discharging the object to be processed are fitted and connected to both ends of an external heat type heating cylinder that is heat-treated while transferring the object to be processed. The heated cylinder is rotatably supported, and a main sealing member made of gland packing is provided between the heating cylinder and the housing to slidably seal the heating cylinder. Further, a sheet shape is provided on the outside of the main sealing member. Auxiliary seal member is provided by surrounding the packing so as to press it against the surface of the heating cylinder via a linear elastic body to form a double-sealed structure, and the auxiliary seal member is detachably fixed to the housing and rotationally heated. It forms a processing device.

Patent Document 4 (Patent No. 5692620) discloses an activated carbon production apparatus that increases the productivity of activation treatment required for a long time.
The activated carbon production apparatus described in Patent Document 4 is a hot air that continuously receives a supply of an activated carbon raw material and wraps and heats the carbonization furnace heating chamber and the carbonization furnace heating chamber that continuously heat and transfer the supplied activated carbon raw material. A carbonization furnace that has a passage and controls the carbonization treatment temperature set according to the thermal decomposition characteristics of the activated carbon raw material to be supplied to produce carbonization, and a carbonization furnace that continuously accepts carbonization from the carbonization furnace and stores the carbonization. It consists of at least one unit and at least the other unit that activates by receiving the supply of activation activation gas after storing the carbides, and wraps around the activation furnace heating chamber and the activation furnace heating chamber in which the carbides are stored and heats them. Multiple carbonized material storage / activation furnaces with hot air passages, and dry distillation gas obtained from the carbonization furnace and carbonization gas and carbonization generated during storage of the carbonization furnace and activation during activation of the carbonization storage / activation furnace It is provided with a carbonization furnace and a hot air generator that sends hot air obtained by burning the activation generation gas generated by supplying the activation gas to the hot air passage of the carbide storage / activation furnace.

Patent Document 5 (Patent No. 5691118) discloses an activated carbon production apparatus that produces carbides as an activated carbon raw material in accordance with the thermal decomposition characteristics of the activated carbon raw material to be treated.
The activated carbon production apparatus described in Patent Document 5 has a plurality of carbonization furnaces whose carbonization temperature can be adjusted independently, and is continuously connected in series so as to sequentially transfer the carbonization raw materials to the next carbonization furnace. The continuous carbonization furnace group in which the carbonization conditions are set according to the thermal decomposition characteristics of the raw material and the carbonized material supplied from the last carbonization furnace of the continuous carbonization furnace group are stored and stored, and after the carbonization is completed, the activation activity is activated. A carbonized material storage / activation furnace that supplies and activates carbonized gas, a dry distillation gas generated from a group of continuous carbonization furnaces, a dry distillation gas generated during storage and storage of carbonized material in a carbonization storage / activation furnace, and carbonization storage / activation. A hot air generator that burns the activated gas generated during activation in the furnace as fuel to generate hot air, and the required number of continuous carbonization furnaces as hot energy used for temperature control using the hot air generated in the hot air generator. It is equipped with a hot air duct that supplies to the carbonization furnace and the carbonized material storage / activation furnace, and a cooler that cools the activator supplied from the carbonized material storage / activation furnace when activation is completed in the carbonized material storage / activation furnace. ..

Patent Document 6 (Japanese Unexamined Patent Publication No. 2014-88457) describes a method for carbonizing waste, which obtains a carbonized product in high yield by continuously and stably carbonizing an object to be treated made of inexpensively produced waste. And carbonization equipment are disclosed.
In the waste carbonization treatment method and carbonization apparatus described in Patent Document 6, plastic waste and organic waste are crushed, and they are mixed, compressed, and heated to form a solid material as a material to be treated. Preheat to 300 ° C or higher in a semi-open type furnace body that has a process of manufacturing the material and an injection part of the object to be processed on the closed wall side and an discharge part of the object to be processed with the other end open. The step of continuously charging the material to be processed from the charging part of the furnace body preheated to 300 ° C. or higher, and the total amount of solid matter charged in the vicinity of the charging part when the material to be processed is charged into the furnace body. The process of continuously supplying oxygen less than the theoretical amount of oxygen into the furnace body, the process of transporting the charged object to be processed from the input section to the discharge section, and the process of being supplied to the preheated furnace body. It includes a self-combustion carbonization step in which the furnace body temperature is maintained by combustion according to the amount of oxygen of the material and the material to be treated is carbonized by dry distilling in which the theoretical amount of oxygen is insufficient.

Patent Document 7 (Japanese Unexamined Patent Publication No. 2013-177620) discloses a reduction carbonization treatment system capable of producing high-energy regenerated coal using a wide range of raw materials.
In the reduction carbonization treatment system described in Patent Document 7, a carbonization treatment apparatus that dries, thermally decomposes, and stores heat of organic substances in one kiln, and a rotatable kiln having an inlet and an outlet, and the like. An organic substance having a high water content, which has a raw material supply unit for introducing an organic substance into the kiln from an inlet and a combustion chamber having the kiln in an internal space and supplying heat to the kiln from the outside. The length of stay in the kiln is longer than that of organic matter with low water content.

Patent Document 8 (International Publication WO2010 / 047283) discloses a reduction carbonization treatment system capable of producing high-energy regenerated coal using a wide range of raw materials.
In the reduction carbonization treatment system described in Patent Document 8, a carbonization treatment apparatus that dries, thermally decomposes, and stores heat of organic substances in one kiln, and a rotatable kiln having an inlet and an outlet, and the like. An organic substance having a high water content, which has a raw material supply unit for introducing an organic substance into the kiln from an inlet and a combustion chamber having the kiln in an internal space and supplying heat to the kiln from the outside. The length of stay in the kiln is longer than that of organic matter with low water content.

Patent Document 9 (Japanese Unexamined Patent Publication No. 10-17312) discloses a carbonizing apparatus in which the residence time of a material to be carbonized in a furnace can be easily adjusted.
In the carbonizing device described in Patent Document 9, a high-temperature gas generator for generating high-temperature gas and a screw conveyor composed of a screw and a trough are used to convey a carbide, and the high-temperature gas and the carbide are transferred during the transfer. It is equipped with a carbonization furnace that carbonizes the material to be carbonized to produce carbide by exchanging heat.

Patent Document 10 (Japanese Unexamined Patent Publication No. 10-17311) discloses a carbonization apparatus capable of preventing ashing of a material to be carbonized and producing a stable carbide.
The carbonizing device described in Patent Document 10 includes a high-temperature gas generating device that generates a high-temperature gas and a carbonizing furnace that carbonizes the carbonized material by heat exchange between the high-temperature gas and the carbonized material to produce carbonized material. It is a thing.

Japanese Unexamined Patent Publication No. 2001-116460 Japanese Unexamined Patent Publication No. 9-72666 Japanese Unexamined Patent Publication No. 2001-324272 Japanese Patent No. 5692620 Japanese Patent No. 5691118 Japanese Unexamined Patent Publication No. 2014-888457 Japanese Unexamined Patent Publication No. 2013-177620 International Publication WO2010 / 047283 Japanese Unexamined Patent Publication No. 10-17312 Japanese Unexamined Patent Publication No. 10-17311

Since the rotary furnace of the carbonization apparatus described in the prior art document is composed of a long metal pipe, when the rotary furnace is heated to a high temperature, the rotary furnace thermally expands in the axial direction and the radial direction.
Then, while the rotary furnace expands thermally with high heat, the rail portion welded to the outside of the rotary furnace has a small degree of thermal expansion, so that the rotary furnace is tightened by the rail portion, and the rotary furnace expands. There is no escape for the force to do so, which can load and damage the carbonizer. Further, since the heat of the rotary furnace is directly transferred to the guide roller, there is a drawback that the guide roller wears early.

Further, in the carbonization apparatus having such a configuration, the supply part and the discharge part are fixed and stationary on the gantry, whereas the rotary furnace rotates, and the rotary furnace extends axially and radially by heating. Since it expands to, a large gap is formed between the rotary furnace and the supply section and between the rotary furnace and the discharge section.

If a gap is formed between the rotary furnace and the supply section, there is a drawback that carbon material and gas leak to the outside of the device through the gap, and if outside air enters the rotary furnace through the gap, the inside of the rotary furnace Since the treatment atmosphere of the above changes, heat treatment such as thermal decomposition or carbonization cannot be performed in a stable state.

However, in the devices of Patent Documents 1 to 3, although research and development have been carried out on the sealing member, the influence of heat is not assumed at all. Furthermore, the problem of wear of the guide roller remains.

Furthermore, the patent documents of Patent Documents 4 to 10 do not assume the influence of heat at all. In addition, the problem of wear of the guide roller remains.

A main object of the present invention is to eliminate the above-mentioned drawbacks, and it is possible to prevent damage to the apparatus when the rotary furnace is thermally expanded and to suppress wear of the guide roller. To provide the equipment.
Another object of the present invention is to have a structure that absorbs thermal expansion and contraction even when the rotary furnace thermally expands and contracts, and is capable of responding to temperature changes and seals between the rotary furnace and the fixing device. It is an object of the present invention to provide a continuous heat treatment apparatus capable of capable.
Still another object of the present invention is to provide a continuous heat treatment apparatus capable of performing heat treatment such as thermal decomposition or carbonization in a stable state.

(1)
The continuous heat treatment device according to one aspect is a continuous heat treatment device, in which heat treatment is performed while transferring an object to be processed, and a rotary furnace that rotates about an axis and a gap between the outer circumferences of the rotary furnace are provided. It is a continuous heat treatment device including an arranged annular frame and a support portion that rotatably supports the frame, and the rotary furnace is a long tubular shape extending in one direction. , A plurality of fitting portions projecting toward the inner peripheral surface of the frame body are provided on the outer peripheral surface of the rotary furnace in the circumferential direction of the rotary furnace, and can be fitted to the fitting portion on the inner peripheral surface of the frame body. A fitted portion is provided, and a space portion is formed between the fitted portion and the fitted portion to allow the fitting portion to move in the radial direction of the rotary furnace.

In this case, when the rotary furnace rotates, the fitting portion of the rotary furnace is fitted to the fitted portion of the frame body, so that the frame body also rotates integrally with the rotary furnace as the rotary furnace rotates. .. Then, the rotary furnace and the frame are rotatably supported by the support portion.
When the rotary furnace is heated and thermally expanded, the fitting portion moves in the radial direction of the rotary furnace. Here, since a space portion is formed between the fitting portion and the fitted portion to allow the fitting portion to move in the radial direction of the rotary furnace, the fitting portion moves into the space portion. As a result, the radial movement of the fitting portion can be absorbed in the space portion, whereby the rotary furnace can be prevented from being damaged.

Moreover, since the support portion is not in direct contact with the rotary furnace, the support portion does not reach a high temperature unlike the rotary furnace. Therefore, since the support portion composed of a plurality of drive members is not easily affected by the temperature of the rotary furnace, wear of the support portion can be suppressed.
Further, the rotary shaft core of the rotary furnace does not fluctuate significantly. Therefore, the sealing property between the rotary furnace and the fixing device (for example, the supply unit and the discharge unit) can be improved. As a result, the carbonaceous material and gas do not leak to the outside of the apparatus through the gap between the rotary furnace and the supply unit, and external air does not enter the rotary furnace through the gap. Therefore, the treatment atmosphere in the rotary furnace is stabilized, and heat treatment such as thermal decomposition or carbonization can be performed in a stable state.

(2)
The continuous heat treatment apparatus according to the second invention is a continuous heat treatment apparatus according to one aspect, in which a space portion may be formed by a fitting portion and a fitted portion.

As a result, the fitting portion moves into the space portion, so that the radial movement of the fitting portion can be absorbed in the space portion, and thereby the rotary furnace can be prevented from being damaged.

(3)
The continuous heat treatment apparatus according to the third invention is the continuous heat treatment apparatus according to the second invention, in which the frame body includes an annular portion and a fitted portion protruding from the inner peripheral surface of the annular portion. The fitting portion includes a first member and a second member protruding from the outer peripheral surface of the rotary furnace, and the fitting portion is arranged in a groove formed between the first member and the second member. , A space portion may be formed between the fitted portion and the groove portion.

In this case, the rotation of the rotary furnace can be reliably transmitted to the frame, and the thermal expansion of the rotary furnace in the radial direction can be absorbed by the space portion.
Further, the first member may be formed from two convex portions, the second member may be formed from one convex portion, and the first member and the second member may be arranged so as to intersect each other. As a result, a stable space can be formed.

(4)
The continuous heat treatment apparatus according to the fourth invention is the continuous heat treatment apparatus according to the third invention, and the fitting portions are located on the outer peripheral surface of the rotary furnace at three locations at equal intervals in the circumferential direction. The above may be provided.

In this case, if three or more fitting portions are provided on the outer peripheral surface of the rotary furnace at equal intervals in the circumferential direction, the fitting portions are fitted under the rotary furnace when the rotary furnace rotates. The joint portion and the fitted portion of the frame body are always fitted. Therefore, the load of the rotary furnace is supported by the support portion via the frame body, and the fitting portion on the upper side of the rotary furnace and the fitted portion of the frame body are fitted in a state where a space portion is formed between them. It fits. Therefore, the thermal expansion of the rotary furnace due to heating is always absorbed by the space.

(5)
The continuous heat treatment apparatus according to the fifth invention is the continuous heat treatment apparatus according to the first invention, further comprising a fixing device having a side plate having an opening into which one end of a rotary furnace is inserted. The seal member includes a seal member having an L-shaped cross section arranged in the gap between the fixing device and the rotary furnace, and the seal member includes a ring-shaped member attached to the outer periphery of the rotary furnace and an opening of a side plate of the fixing device. It has a disk-shaped flange that is rotatably arranged on the periphery of the portion, and a first packing that slides into the side plate of the fixing device is attached to the flange, and the fixing bracket fixed to the side plate of the fixing device , A roller that presses the flange toward the side plate may be attached.

In this case, when the rotary furnace rotates, the seal member also rotates integrally with the rotary furnace. Therefore, the seal member is held in a state where the flange of the seal member is sandwiched between the roller of the fixing bracket fixed to the fixing device and the side plate. The flange of is moved in an arc. Therefore, since the roller presses the first packing toward the side plate, the gap between the side plate of the fixing device (supply unit) and the rotary furnace is surely sealed by the sealing member.
As a result, the carbonaceous material and gas do not leak to the outside of the device through the gap between the rotary furnace and the fixing device (supply unit), and the outside air does not enter the rotary furnace through the gap. Therefore, the treatment atmosphere in the rotary furnace is stabilized, and heat treatment such as thermal decomposition or carbonization can be performed in a stable state.

(6)
In the continuous heat treatment apparatus composed of other aspects, a rotary furnace that rotates around the axis by heat treatment while transferring the object to be processed and an opening into which one end of the rotary furnace is inserted are formed in the side plate. A continuous heat treatment device including a fixing device and a sealing member having an L-shaped cross section arranged in a gap between the fixing device and the rotary furnace. The sealing member is an opening of a side plate of the fixing device. A first having a disk-shaped (annular) flange rotatably arranged on the peripheral edge of the rotary furnace and a ring-shaped member attached to the outer periphery of the rotary furnace, which is slidably contacted with the flange of the sealing member and the side plate of the fixing device. The packing is attached, and a roller that presses the flange of the sealing member toward the side plate is attached to the fixing bracket fixed to the side plate of the fixing device.

In this case, when the rotary furnace rotates, the seal member also rotates integrally with the rotary furnace. Therefore, the seal member is held in a state where the flange of the seal member is sandwiched between the roller of the fixing bracket fixed to the fixing device and the side plate. The flange of is moved in an arc. Therefore, since the roller presses the first packing toward the side plate, the gap between the side plate of the fixing device (supply unit) and the rotary furnace is surely sealed by the sealing member.

As a result, carbon material and gas do not leak to the outside of the device from the gap between the rotary furnace and the fixing device (supply unit), and external air does not enter the rotary furnace through the gap. The treatment atmosphere in the rotary furnace is stabilized, and heat treatment such as thermal decomposition or carbonization can be performed in a stable state.

(7)
The continuous heat treatment apparatus according to the seventh invention is a continuous heat treatment apparatus according to another aspect, in which the fixing metal fittings are fixed to a plurality of side plates along the peripheral edge of the opening of the side plate, and the shaft core of the support shaft of the roller is fixed. The direction may be orthogonal to the axial core direction of the rotary furnace.

In this case, since the flange of the sealing member can be pressed with a uniform force by the roller of the fixing bracket, the sealing property can be further improved.

(8)
The continuous heat treatment apparatus according to the eighth invention may be provided with a second packing between the ring-shaped member of the seal member and the rotary furnace in the continuous heat treatment apparatus according to another aspect.

In this case, the sealing property between the rotary furnace and the side plate of the fixing device can be further improved by the second packing, and the sealing member is integrally rotated with the rotary furnace by the elasticity and friction of the second packing. Can be done.

(9)
The continuous heat treatment apparatus according to the ninth invention is the continuous heat treatment apparatus according to the first invention or the continuous heat treatment apparatus according to another aspect, in which the object to be treated is rice husk and the rotary furnace is to be treated. It may be a carbonization furnace that carbonizes by heat-treating while transferring an object.

In this case, a continuous heat treatment device can be used to carbonize the rice husks to produce a carbonaceous material. Activated carbon can be obtained by activating this carbonaceous material. The produced carbonaceous material can also be used as a carbon raw material other than activated carbon.

(A)
In the above-mentioned continuous heat treatment apparatus, the seal member is provided with a fastener that compresses the second packing and holds it on the seal member, and even if the compressed second packing is pressed against the outer peripheral surface of the rotary furnace. Good.
In this case, the fastener can reliably attach the seal member to the rotary furnace.

It is a schematic perspective view of the continuous heat treatment apparatus which concerns on this embodiment. It is a schematic cross-sectional view of the continuous heat treatment apparatus. It is a schematic enlarged sectional view of the main part of the continuous heat treatment apparatus. It is a schematic cross-sectional view which shows the seal structure of the rotary furnace of a continuous heat treatment apparatus, and the side plate of a fixing apparatus. It is a schematic diagram which shows the method of giving an angle to the rotary furnace of a continuous heat treatment apparatus. It is a schematic enlarged sectional view of the main part of the continuous heat treatment apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are designated by the same reference numerals. Moreover, in the case of the same code, their names and functions are also the same. Therefore, the detailed description of them will not be repeated.
FIG. 1 is a schematic perspective view of the continuous heat treatment device 10 according to the embodiment of the present invention, FIG. 2 is a schematic cross-sectional view of the continuous heat treatment device 10, and FIG. 3 is a main part of the continuous heat treatment device 10. It is a schematic enlarged sectional view.

As shown in FIGS. 1 to 3, the continuous heat treatment apparatus 10 according to the embodiment of the present invention includes a rotary furnace 100 that heat-treats the object to be processed while transferring the object to be processed and rotates about the axis, and a rotary furnace. An annular frame body 120 arranged on the outer periphery of the 100 via a gap, and a support portion 130 that rotatably supports the frame body 120 are included.
The continuous heat treatment device 10 (hereinafter, also simply referred to as a heat treatment device) is a fixing device 200 (hereinafter, also referred to as a supply unit) to which an upstream end portion (left end portion in FIG. 1) of the rotary furnace 100 is further connected. ) Is included.

As shown in FIGS. 1 and 4, an opening 220 is formed in the side plate 210 of the fixing device 200, and the left end portion of the rotary furnace 100 is rotatably inserted into the opening 220. The supply unit 200 is connected to the supply hopper of the object to be processed.
The downstream end portion (right end portion in FIG. 1) of the rotary furnace 100 is connected to another fixing device 250 (hereinafter, also referred to as a discharge portion).

The object to be processed is supplied from the supply unit 200 into the rotary furnace 100, and the heat-treated object (for example, carbonized material) is discharged by heat-treating (for example, carbonizing) while transferring the object to be processed in the rotary furnace 100. It is designed to be discharged from the part 250.
The continuous heat treatment device 10 is usually installed on the gantry 50.

As shown in FIG. 5A, the gantry 50 is specified as the rotary furnace 100 by setting the mounting height of the rotary furnace 100 to the supply section 200 higher than the mounting height to the discharge section 250 while keeping the gantry 50 horizontal. The tilt angle of can be given. That is, when the tilt angle is determined from the design stage, it can be adjusted to a specific tilt angle from the time of manufacturing the rotary furnace 100.
Further, as shown in FIG. 5B, the rotary furnace 100 itself may be designed in a horizontal state. In this case, the rotary furnace 100, the supply unit 200, and the discharge unit 250 can be designed in a state of being placed on a horizontal plane. That is, the manufacturing cost can be reduced.

Further, the tilt angle of the rotary furnace 100 may be adjusted by mounting the rotary furnace 100 designed in a horizontal state on the gantry 50 whose tilt angle of the gantry 50 can be adjusted by the support member 52. By appropriately adjusting the tilt angle of the gantry 50, the tilt angle of the rotary furnace 100 can be freely adjusted.
By providing the rotary furnace 100 with an inclination angle in this way, the object to be processed is discharged from the discharge unit 250 at a specific speed as the rotary furnace 100 rotates. The tilt angle and rotation speed of the rotary furnace 100 are appropriately set according to the type of raw material of the object to be processed and the required heat treatment time.

The rotary furnace 100 can be composed of a rotary kiln (rotary drum).
Both ends of the rotary furnace 100 are rotatably supported by support portions 130. The support portion 130 may include a guide roller 134 in the present embodiment. One end of the rotary furnace 100 is inserted into an opening 220 formed in the side plate 210 of the supply unit 200. Further, the other end of the rotary furnace 100 is inserted into an opening (not shown) formed in the side plate of the discharge portion 250.

Gears and the like are formed around the rotary furnace 100, and gears driven by a motor are engaged with each other, and the rotary furnace 100 is configured to be rotated by the drive of the motor.
A combustion device such as a biomass burner such as a gas burner or a wood pellet burner is attached toward the inside of the rotary furnace 100, and the inside of the rotary furnace 100 is heated by the combustion device. The gas burner can be provided at one end and / or the intermediate portion of the rotary furnace 100, and high-temperature treatment of the object to be treated (charcoal material or the like) is performed by hot air or flame.

As shown in FIG. 1, the support portion 130 rotatably supports the frame body 120. The support portion 130 has a base 132 fixed to the base 50 and a guide roller 134 rotatably supported by the base 132. A plurality of support portions 130 are arranged on the lower side of the rotary furnace 100. Both ends of the rotary furnace 100 are rotatably supported by a plurality of support portions 130, and are rotatably driven by a drive device including a motor.

The supply unit 200 and the discharge unit 250 are fixed and stationary on the gantry 50, whereas the rotary furnace 100 is rotating, so that a gap formed between the rotary furnace 100 and the supply unit 200 is formed. And a seal structure that seals the gap formed between the rotary furnace 100 and the discharge portion 250 is adopted. The specific configuration of the seal structure will be described later.

In the continuous heat treatment apparatus 10 having such a configuration, the rotary furnace 100 is typically installed so as to be slightly downwardly inclined toward the discharge portion 250, and the rotary furnace 100 is rotated about its axis. As a result, the object to be processed such as the carbonaceous material supplied from the supply unit 200 into the rotary furnace 100 is heat-treated while being agitated and sent to the discharge unit 250 side.

The object to be treated may include, for example, rice husks, powders such as sawdust, waste from ordinary households, and other wastes.

The specific configuration of each member is as follows.
(Rotary furnace 100)
As described above, both ends of the rotary furnace 100 having a body having a long metal member on the outer surface and a concrete inside are rotatably supported by the support portions 130. At the position of the support portion 130, an annular frame body 120 is arranged on the outer periphery of the rotary furnace 100 via a gap.
As shown in FIGS. 1 to 3, at the arrangement position of the frame body 120, the fitting portion 110 projecting from the outer peripheral surface of the rotary furnace 100 toward the inner peripheral surface of the frame body 120 is the circumference of the rotary furnace 100. Multiple are provided in the direction. In this embodiment, the fitting portion 110 includes a first member 111 and a second member 112 protruding from the outer peripheral surface of the rotary furnace 100, and a groove portion 113 is formed between the first member 111 and the second member 112. There is.

Then, in the present embodiment, as shown in FIG. 3, in the fitting portion 110, the first member 111 and the second member 112 are connected by a bottom plate 114. The bottom plate 114 is curved along the outer peripheral surface of the rotary furnace 110, and the first member 111 and the second member 112 are provided at both curved ends of the bottom plate 114, respectively.
In order to fit the fitting portion 110 having such a configuration to the fitted portion 124, as shown in FIG. 3, the fitting portion 110 is aligned with the grooved portion 113 of the fitting portion 110 and is aligned with the fitted portion 124. May be moved in the axial direction of the rotary furnace 100. After that, the bottom plate 114 of the fitting portion 110 in which the first member 111 and the second member 112 are integrally formed by the bottom plate 114 is attached to the outer peripheral surface of the rotary furnace 100 by welding.

Further, as shown in FIG. 6, at the fitting portion adjacent to the fitting portion between the fitting portion 110A (fitting portion 110 in FIG. 3) and the fitted portion 124, the first member 111 and the first member 111 The two members 112 are integrally connected by the bottom plate 114.
That is, it is necessary to form the fitting portion 110A in the gap between the outer peripheral surface of the rotary furnace 100 and the inner peripheral surface of the frame body 120. In this case, the thicknesses of the first member 111 or the second member 112, the bottom plate 114, and the fitted portion 124 constituting the fitting portion 110A are each smaller than the interval, but the total thickness is smaller than the gap. Of course it is also big.

Therefore, first, the fitted portion 124 is welded to the frame body 120. Next, the first member 111 and the second member 112 are fitted into the fitted portion 124, and the bottom plate 114 is inserted into the outer peripheral surface side of the rotary furnace 100 and welded to the outer peripheral surface, and then the first member 111. And weld to the second member 112. Thereby, the fitting portion 110A can be formed.

Next, the fitting portion 110B is formed by rotating the fitted portion 124, the first member 111, and the second member 112 in the fitting portion 110A by 90 degrees, and is formed by the same procedure as the welding method. Can be done.
Further, by forming the fitting portion 110A and the fitting portion 110B, the rattling of the frame body 120 can be reduced.

The bottom plate 114 in FIG. 3 is shown to be curved along the outer peripheral surface of the rotary furnace 100, but when the size of the rotary furnace 100 is sufficiently larger than the size of the bottom plate 114, the rotary furnace 100 is shown. Since the outer peripheral surface of the bottom plate 114 is close to a flat surface, a flat plate can be used for the bottom plate 114.

By using the fitting portions 110A and 110B in this way, the fitting portion 110 can be easily and accurately formed on the outer peripheral surface of the rotary furnace 100. In this way, the space portion 115 is formed by the groove portion 113 composed of the first member 111, the second member 112, and the bottom plate 114, and the fitted portion 124.

The structure of the fitting portion and the fitting portion is not limited to the above embodiment, and any space portion that can be moved in the radial direction can be formed between the fitting portion and the fitted portion. For example, the fitting portion and the fitted portion may each be composed of substantially U-shaped members, and the fitting portion and the fitted portion may be moved in opposite directions to fit the fitting portion and the fitted portion. In that case, when the fitting portion and the fitted portion are fitted, the fitting portion and the fitted portion are fitted so that the fitting portion and the fitted portion cannot be moved in the axial direction and the circumferential direction of the rotary furnace. A joint is formed. For example, the width dimension of the fitting portion of the fitting portion and the fitting portion may be formed larger than the inner width dimension of the groove portion. In order to fit the fitting portion and the fitted portion, the fitting portion and the fitted portion are moved in opposite directions to fit the two, and then the fitting portion and the outer peripheral surface of the rotary furnace are formed. A bottom plate is inserted between the two to move the fitting portion toward the fitted portion side, and then the fitting portion and the bottom plate are welded to the outer peripheral surface of the rotary furnace.

It is preferable that the fitting portions 110 are provided at three or more locations in the circumferential direction of the rotary furnace 100. In the present embodiment, the number is 4, but the number is not limited to 4, and any number is preferable. FIG. 2 shows an example in which the fitting portions 110 are provided at four locations for the sake of brevity.

(Frame body 120)
The frame body 120 is composed of an annular metal member arranged on the outer periphery of the rotary furnace 100 with a gap. The gap distance can be set arbitrarily, but the ratio of the diameter of the rotary furnace 100 to the distance of one gap (gap / rotary furnace) is preferably 0.009 or more and 0.091 or less, and is 0.018. More than 0.036 or less is preferable. The gap distance is preferably 10 mm or more and 100 mm or less, and preferably 20 mm or more and 40 mm or less.

A fitted portion 124 that can be fitted to the fitting portion 110 is provided on the inner peripheral surface of the frame body 120. That is, the frame body 120 includes an annular portion 122 and a fitted portion 124 projecting from the inner peripheral surface of the annular portion 122. The fitted portion 124 is composed of a protrusion having a mountain-shaped cross section.
Then, a space portion 115 is formed between the fitting portion 110 and the fitted portion 124 to allow the fitting portion 110 to move outward in the radial direction of the rotary furnace 100. The size and shape of the space portion 115 can be appropriately set according to the size of the rotary furnace 100, the frame body 120, the heating temperature, and the like.

When the rotary furnace 100 is rotated by the drive of the motor, the fitting portion 110 of the rotary furnace 100 is fitted to the fitted portion 124 of the frame body 120, so that the frame body 120 also rotates with the rotation of the rotary furnace 100. It rotates integrally with the furnace 100. That is, the frame body 120 is carried around to the rotary furnace 100.

When the rotary furnace 100 is thermally expanded by heating, the fitting portion 110 moves to the outside in the radial direction of the rotary furnace 100, and is fitted between the fitting portion 110 and the fitted portion 124. Since the space portion 115 that allows the joint portion 110 to move in the radial direction of the rotary furnace 100 is formed (FIG. 3), the fitting portion 110 moves into the space portion 115, so that the fitting portion 110 The movement can be absorbed by the space portion 115. As a result, even when the rotary furnace 100 is thermally expanded, it is not tightened and damaged by the frame body 120. Further, the rotary shaft core of the rotary furnace 100 does not fluctuate significantly due to heating.

That is, as shown in FIG. 2, a plurality of fitting portions 110 (preferably three or more places) are provided on the outer peripheral surface of the rotary furnace 100 at equal intervals in the circumferential direction, and the rotary furnace 100 is provided. It is supported by the support portion 130 via the frame body 120 by fitting the fitting portion 110 and the fitted portion 124.

In the state shown in FIG. 2, the load of the rotary furnace 100 is reduced by the fitting (contact) between the first fitting portion 110a on the lower side of the rotary furnace 100 and the first fitted portion 124a of the frame body 120. Although it is supported by the support portion 130 via the frame body 120, there is a space between the second fitting portion 110b on the upper side of the rotary furnace 100 and the second fitting portion 124b of the frame body 120. The portion 115 is fitted in a formed state.

Therefore, the movement of the fitting portion 110 of the rotary furnace 100 to the outside in the radial direction by heating is performed between the second fitting portion 110 of the rotary furnace 100 and the second fitted portion 124 of the frame body 120. It will be absorbed by the formed space 115. Therefore, the rotary furnace 100 is not damaged by being tightened to the frame body 120, and the position of the shaft core of the rotary furnace 100 does not change significantly due to heating.
Further, although the rotary furnace 100 thermally expands in the axial direction thereof, the rotary furnace 100 slides to the inner peripheral surface of the frame body 120 while maintaining the fitted state with the fitted portion 124. To do.

Next, a method of producing a carbonaceous material from rice husks using the rice husk as an object to be treated and using the continuous heat treatment apparatus 10 will be described.
The body portion of the rotary furnace 100 is tilted downward at a small angle of about 1/100 or more and 30/100 or less, is supported by the frame body 120 and the support portion 130, and is rotated by a motor via a gear fixed to the body portion. Driven.
A supply unit 200 fixed to the gantry 50 is arranged at one end on the inlet side of the rotary furnace 100, and a discharge unit 250 fixed to the gantry 50 is arranged at one end on the outlet side. A gas burner is fixed in the vicinity of the supply unit 200, and the rice husks are carbonized into a carbonaceous material by contact with the high-temperature gas generated by sending air. In this rotary furnace 100, it is controlled so as not to ignite internally.
Fuel oil may be introduced into the gas burner from the oil tank, and in this way, the rotary furnace 100 can be efficiently heated when the heat treatment apparatus 10 is started.

In the heat treatment apparatus 10 having such a configuration, the raw material supply device (hopper) receives the rice husks, transfers the rice husks from the supply unit 200 connected to the hopper into the rotary furnace 100, and heat-treats the rice husks in the rotary furnace 100. The rice husks are carbonized, and the carbonaceous material discharged from the discharge unit 250 is cooled and then crushed by a crusher to become fine powder.

The carbonaceous material thus obtained can be activated with, for example, a gas activator to produce activated carbon (gas activation method). As the gas activator, high-temperature steam, carbon dioxide, or the like can be used.
The activation treatment can be carried out, for example, by mixing a carbonaceous material and steam at 750 ° C. or higher in a rotary activation furnace filled with nitrogen gas and stirring for 20 minutes or longer. The carbonaceous material is gasified by the activation treatment to become activated carbon having fine pores.
C _n + H ₂ O = C _n-1 + CO + H ₂
At this time, the performance of the activated carbon can be adjusted by the type of the gas activator, the supply amount of the gas activator, the temperature of the activation furnace heating chamber, the activation time, the cooling method, and the like.
Further, the carbonaceous material obtained as described above can also be used as a carbon raw material other than activated carbon.

(Second Embodiment)
In the continuous heat treatment apparatus 10 of the second embodiment, the rotary furnace 100 that heat-treats while transferring the object to be processed and rotates about the axis, and the opening 220 into which one end of the rotary furnace 100 is inserted. Includes a supply unit 200 as a fixing device having a side plate 210 on which the is formed, and a seal member 300 having an L-shaped cross section arranged in a gap between the supply unit 200 and the rotary furnace 100.
The rotary furnace 100 has the same configuration as the rotary furnace 100 described in the first embodiment.

The supply unit 200 can have the same configuration as the supply unit 200 described in the first embodiment (on the upstream side of the raw material supply) on one end side of the rotary furnace 100, and on the other end side of the rotary furnace 100 (raw material). The configuration can be the same as that of the discharge unit 250 described in the first embodiment (on the downstream side of the supply).

In the second embodiment, as shown in FIG. 1, a supply unit 200 connected to the raw material supply hopper is disposed at the left end portion of the rotary furnace 100, and the right end portion of the rotary furnace 100 is heat-treated. A discharge unit 250 for transferring the processed material to the next step is provided.
The opening 220 provided in the side plate 210 of the supply unit 200 is a circular hole, and is formed to be slightly larger than the outer diameter of the rotary furnace 100.

The rotary furnace 100 and the supply section 200, and the rotary furnace 100 and the discharge section 250 are slidably connected to each other via a seal member 300.
As shown in FIG. 4, the seal member 300 is attached to a disk-shaped (annular) flange 310 rotatably arranged on the peripheral edge of the opening 220 of the side plate 210 of the supply unit 200 and the outer periphery of the rotary furnace 100. It has a ring-shaped member 320.

The seal member 300 is made of metal. One end of the flange 310 and one end of the ring-shaped member 320 are continuous, and the cross section is formed in an L shape.
A first packing 312 that is in sliding contact with the side plate 210 of the supply unit 200 is attached to the flange 310 of the seal member 300.

In this embodiment, a concave groove 314 is formed on the surface of the flange 310 on the supply portion side, and a band-shaped first packing 312 is mounted in the concave groove 314. As the first packing 312, for example, a gland packing made of a carbonized material having excellent heat resistance can be used. The surface side of the flange 310 is formed on a smooth surface.

A ring-shaped member 320 of the seal member 300 is attached to the outer peripheral surface of the rotary furnace 100. The inner diameter of the ring-shaped member 320 is set to be slightly larger than the outer diameter of the rotary furnace 100, and when the ring-shaped member 320 is fitted onto the rotary furnace 100, the ring-shaped member 320 and the rotary furnace 100 are combined. A gap of about several millimeters is formed between them, and a second packing 322 is arranged in the gap. Due to the elastic rebound force and friction of the second packing 322, the ring-shaped member 320 is attached to the outer peripheral surface of the rotary furnace 100.

A notch 340 for arranging and positioning the second packing 322 is formed on the rotary furnace 100 side of the ring-shaped member 320. Further, the seal member 300 is provided with a fastener 330 that compresses the second packing 322 and holds it in the seal member 300.

The fastener 330 has a bolt 332 screwed to the end of the ring-shaped member 320 of the seal member 300, and a fastener piece 334 provided with a hole for passing the bolt 332. By tightening the bolt 332 to the seal member 300, the side surface of the second packing 322 is pressed by the fastening piece 334. Then, the second packing 322 is deformed, a part of the second packing 322 protrudes from the bottom surface of the ring-shaped member 320 toward the rotary furnace 100, and the second packing 322 is pressed against the outer peripheral surface of the rotary furnace 100. To. As a result, the seal member 300 is attached to the outer peripheral surface of the rotary furnace 100 by the elastic rebound force and friction of the second packing 322.

As described above, the flange 310 of the seal member 300 is attached with the first packing 312 that is in sliding contact with the side plate 210 of the supply unit 200. That is, a concave groove 314 is formed on the bottom surface of the flange 310 on the supply portion 200 side, and a band-shaped first packing 312 is mounted in the concave groove 314.

A roller 410 that presses the flange 310 of the sealing member 300 toward the side plate 210 is attached to the fixing bracket 400 fixed to the side plate 210 of the supply unit 200.

The fixing bracket 400 includes a fixing piece 440 fixed to the side plate 210 of the supply unit 200, a standing piece 420 erected from the fixed piece 440 in a direction parallel to the axis direction of the rotary furnace 100, and a standing piece 420. It has a rotating shaft 430 inserted into a shaft hole provided in the above, and a roller 410 attached to the rotating shaft 430.
When the fixing piece 440 of the fixing bracket 400 is fixed to the side plate 210, the axis of the rotating shaft 430 becomes orthogonal to the axis of the rotary furnace 100, and therefore the rotation of the roller 410 pivotally attached to the rotating shaft 430. The shaft is orthogonal to the shaft core of the rotary furnace 100.

The fixing bracket 400 can be fixed to the side plate 210 by welding or a fixing tool such as a screw.
As shown in FIG. 1, a plurality of fixing brackets 400 are fixed to the side plate 210 on the outside of the flange 310. That is, the plurality of fixing brackets 400 are arranged on the side plates 210 so as to draw an arc at equal intervals. A plurality of fixing brackets 400 are fixed to the side plate 210 along the peripheral edge of the opening 220 of the side plate 210, and the axial core direction of the support shaft of the roller 410 is orthogonal to the axial core direction of the rotary furnace 100.

When the rotary furnace 100 rotates, the seal member 300 also rotates integrally with the rotary furnace 100, so that the flange 310 is sandwiched between the roller 410 of the fixing bracket 400 fixed to the supply unit 200 and the side plate 210. The flange 310 of the seal member 300 moves in an arc. Therefore, since the roller 410 constantly presses the first packing 312 toward the side plate 210, the gap between the side plate 210 of the supply unit 200 and the rotary furnace 100 is always sealed by the sealing member 300.

When the rotary furnace 100 expands in the radial direction due to heating, the seal member 300 attached to the rotary furnace 100 also moves outward in the radial direction, but between the fixing bracket 400 and the side plate 210. Due to the space being formed, the flange 310 moves outward in the radial direction while maintaining the sealed state.
When the rotary furnace 100 is extended in the axial direction by heating, the extension of the rotary furnace 100 can be absorbed by the deformation of the first packing 312 arranged between the side plate 210 and the seal member 300. .. Here, in the maximum extended state of the rotary furnace 100, the dimension between the sealing member 300 and the side plate 210 may be set so as to be sealed by the second packing 322.

In the above embodiment, the object to be processed charged in the heat treatment apparatus 10 is directly heated in the rotary furnace 100 for processing, but the object to be processed charged in the rotary furnace 100 of the heat treatment apparatus 10 is processed. May be configured as an external heat type in which is indirectly heated from the outside of the rotary furnace 100 for processing.
By adopting the external heat type, the temperature control in the furnace can be precisely controlled, and the temperature in the furnace can be kept uniform. Further, unlike the internal heat type, the object to be treated is not burned, so that a high quality carbide can be obtained.

Further, when the object to be processed is supplied into the rotary furnace 100 from the supply unit 200 provided with the supply hopper, the object to be processed is sent from the supply unit 200 into the rotary furnace 100 by using a screw conveyor, a chute or the like. You may.

In the above embodiment, the fitting portion 110 formed in the rotary furnace 100 is composed of a first member 111 and a second member 112 projecting from the outer peripheral surface of the rotary furnace 100 in a cross-section C shape, and is inside the frame body 120. The fitted portion 124 provided on the peripheral surface was composed of the fitted portion 124 having a mountain-shaped cross section arranged in the groove portion 113 formed between the first member 111 and the second member 112. The form of the joint portion 110 and the fitted portion 124 is not limited in any way. For example, the fitted portion and the fitted portion have the opposite forms, the fitted portion is composed of a pair of the first member and the second member, and the fitting portion is formed between the first member and the second member. It may be composed of a mountain-shaped member arranged in the groove to be formed.

Further, an inclined surface inclined in the axial direction of the rotary furnace may be provided on the surface where the fitting portion and the fitting portion come into contact with each other. That is, on the contact surface of the first member, the contact surface of the second member, and / or the contact surface of the fitted portion so that the width of the groove portion widens when the rotary furnace extends in the axial direction due to heating. An inclined surface may be formed. With this configuration, the fitting depth between the fitting portion and the fitted portion increases as the rotary furnace extends, so that fluctuations in the axial core position of the rotary furnace can be further suppressed.

Further, in the above embodiment, the example of the continuous heat treatment device 10 for carbonizing rice husks has been described, but the device of the present invention is also applied to the case of carbonizing other wastes such as sludge and wood chips in addition to rice husks. In addition, for example, sludge-derived substances (sewage sludge, rice urine sludge, various industrial sludges generated by production activities, etc.), plant-derived substances (waste wood, building materials, coconut shells, etc.), polymer substances-derived substances. The continuous heat treatment apparatus of the present invention is also used to obtain dried matter and charcoal from substances (resin, rubber, etc.), livestock waste or livestock excrement (cow manure, pig manure, chicken manure, etc.), or a mixture of these substances. Can be used.
Further, in addition to the carbonization device, the present invention can be similarly applied to each device such as a drying furnace and a pyrolysis furnace.

In the present invention, the heat treatment apparatus and the continuous heat treatment apparatus 10 correspond to the "continuous heat treatment apparatus", the rotary furnace 100 corresponds to the "rotary furnace", and the fitting portion 110 corresponds to the "fitting portion". Corresponding, the frame body 120 corresponds to the "frame body", the support portion 130 corresponds to the "support portion", the seal member 300 corresponds to the "seal member", and the space portion 115 corresponds to the "space portion". , The flange 310 corresponds to the "flange", the groove 113 corresponds to the "groove", the first member 111 corresponds to the "first member", the second member 112 corresponds to the "second member", and the second member The packing 312 of 1 corresponds to the "first packing", the second packing 322 corresponds to the "second packing", the fixing device 200 and the supply unit 200 correspond to the "fixing device", and the side plate 210 corresponds to the "fixing device". The support portion 130 corresponds to the "support portion", the ring-shaped member 320 corresponds to the "ring-shaped member", the fixing bracket 400 corresponds to the "fixing bracket", and the roller 410 corresponds to the "roller". Corresponds to.

A preferred embodiment of the present invention is as described above, but the present invention is not limited thereto. It will be appreciated that various embodiments are made that do not deviate from the spiritual scope of the present invention. Further, in the present embodiment, the actions and effects according to the constitution of the present invention are described, but these actions and effects are examples, and do not limit the present invention.

10 Continuous heat treatment device, heat treatment device 100 Rotating furnace 110 Fitting part 111 First member 112 Second member 113 Groove part 115 Space part 120 Frame body 122 Ring part 124 Fitting part 130 Support part 134 Guide roller 200 Fixing device , Supply unit 210 Side plate 220 Opening 300 Sealing member 310 Flange 312 First packing 320 Ring-shaped member 322 Second packing 330 Fastener 400 Fixing bracket 410 Roller

Claims (9)

A rotary furnace that heat-treats while transferring the object to be processed and rotates around the axis,
An annular frame arranged on the outer circumference of the rotary furnace with a gap, and
A continuous heat treatment device including a support portion that rotatably supports the frame body.
The rotary furnace is a long tubular shape that extends in one direction.
A plurality of fitting portions projecting toward the inner peripheral surface of the frame are provided on the outer peripheral surface of the rotary furnace in the circumferential direction of the rotary furnace.
A fitted portion that can be fitted to the fitting portion is provided on the inner peripheral surface of the frame body.
A continuous heat treatment apparatus in which a space portion is formed between the fitting portion and the mated portion to allow the fitting portion to move in the radial direction of the rotary furnace. The continuous heat treatment apparatus according to claim 1, wherein the space portion is formed by the fitting portion and the fitted portion. The frame includes an annular portion and the fitted portion that protrudes from the inner peripheral surface of the annular portion.
The fitting portion includes a first member and a second member protruding from the outer peripheral surface of the rotary furnace.
The fitted portion is arranged in a groove formed between the first member and the second member, and the space portion is formed between the fitted portion and the groove portion. Item 2. The continuous heat treatment apparatus according to Item 1 or 2. The continuous heat treatment apparatus according to any one of claims 1 to 3, wherein the fitting portions are provided on the outer peripheral surface of the rotary furnace at three or more locations at equal intervals in the circumferential direction. .. Further, a fixing device having a side plate having an opening into which one end of the rotary furnace is inserted, and
A seal member having an L-shaped cross section arranged in a gap between the fixing device and the rotary furnace is included.
The seal member is
A ring-shaped member attached to the outer circumference of the rotary furnace and
It has a disk-shaped flange that is rotatably arranged on the periphery of the opening of the side plate of the fixing device.
A first packing that is in sliding contact with the side plate of the fixing device is attached to the flange.
The continuous heat treatment device according to any one of claims 1 to 4, wherein a roller for pressing the flange toward the side plate is attached to a fixing bracket fixed to the side plate of the fixing device. A rotary furnace that heat-treats while transferring the object to be processed and rotates around the axis,
A fixing device having a side plate having an opening into which one end of the rotary furnace is inserted,
A continuous heat treatment device including a seal member having an L-shaped cross section arranged in a gap between the fixing device and the rotary furnace.
The seal member is
A ring-shaped member attached to the outer circumference of the rotary furnace and
It has a disk-shaped flange that is rotatably arranged on the periphery of the opening of the side plate of the fixing device.
A first packing that is in sliding contact with the side plate of the fixing device is attached to the flange.
A continuous heat treatment device in which a roller for pressing the flange toward the side plate is attached to a fixing bracket fixed to the side plate of the fixing device. The continuation according to claim 6, wherein a plurality of the fixing metal fittings are fixed to the side plate along the peripheral edge of the opening of the side plate, and the axial core direction of the support shaft of the roller is orthogonal to the axial core direction of the rotary furnace. Type heat treatment equipment. The continuous heat treatment apparatus according to claim 6 or 7, wherein a second packing is provided between the ring-shaped member and the rotary furnace. The continuous heat treatment apparatus according to any one of claims 1 to 8, wherein the object to be treated is rice husk, and the rotary furnace is a carbonization furnace in which the object to be processed is heat-treated and carbonized while being transferred.