JP5058703B2 - Drying equipment - Google Patents

Description

  The present invention relates to a drying apparatus (or carbonization apparatus) that dries or carbonizes industrial waste with high efficiency.

  Conventionally, in this type of apparatus, a technique such as deodorizing by burning dry distillation gas generated along with drying of an object has been adopted. However, simply burning the dry distillation gas is a problem from the viewpoint of energy saving.

On the other hand, the drying apparatus shown in Patent Document 1 uses dry distillation gas as a fuel, and is provided with fins for causing hot air to advance in a spiral manner for the purpose of improving efficiency. The configuration is adopted.
Japanese Patent Application No. 2002-192107 (columns 0018, 0025, etc.)

  However, in the above drying apparatus, the primary combustion furnace, which is a heat source for supplying hot air, is far from the position of the drying process and is not efficient. On the other hand, when the combustion furnace is installed close to the object to be dried, there is a risk of explosion in the drying process due to the inflow of oxygen from the outside air, etc. In reality, it is desired to realize a safe and highly efficient drying apparatus.

  The problem to be solved by the present invention is that the current drying apparatus is insufficient in the effective use of heat generated in the combustion furnace, and the safety measures in the case of drying with higher heat than before are insufficient. It is a point. An object of the present invention is to solve such problems and to provide a drying device that is totally safe and highly efficient by blocking dry distillation gas from outside air.

  A drying apparatus according to the present invention includes a hopper that inputs a drying object, a transport unit that includes a screw that sends out the drying object from the hopper, an internal screw that moves the drying object that arrives from the transport unit, and an inlet side. A cylindrical body having a plurality of ridges extending linearly from the outlet side to the outlet side and having an external screw on the outer wall, the inner cylinder rotating about an axis of the cylindrical body, and the inner cylinder And an outer envelope having a heat chamber portion for generating a hot gas for heating the inner cylinder body, and a burner for overheating the heat chamber portion. And an exhaust gas supply means for supplying the exhaust gas generated by the burner from the transfer tip of the dry object to the screw in the transfer unit.

  In the drying apparatus according to the present invention, the outer wall of the inner cylindrical body is provided with a plurality of ridges extending linearly from the inlet side to the outlet side, and the external screw is disposed on the ridges. It is characterized by.

  The drying apparatus according to the present invention includes a conduit for guiding the gas generated in the hopper and the dry distillation gas generated in the inner cylinder from the outlet side to the crater side of the burner.

  In the drying apparatus according to the present invention, the cylindrical outer wall portion of the transport portion surrounds the heat-resistant seal member provided free from the transport portion and the heat-resistant seal member, and is positioned on the outer peripheral portion of the transport portion. A body, a ring-shaped friction plate projecting in a radial direction from the enclosure, and a flange provided on an end surface of the inner cylinder so as to enclose the heat-resistant seal member, the enclosure and the friction plate A disk-shaped cover body provided on the inner wall of the cover body, a hole in which the heat-resistant sealing member and the enclosure are located is formed in the center portion, and the friction plate is interposed therebetween And two heat-resistant and wear-resistant materials that are held by the two holding plates and sandwich the friction plate freely at the center, and the covering body, and are arranged in the axial direction of the transport unit. A group of spring shafts extending in parallel with the Each interposed axially group, characterized in that it comprises a seal structure comprising a plurality of springs for urging the far holding plate from the end face of the inner cover in the two holding plates to the end face direction.

  In the drying apparatus according to the present invention, it is connected to a flange provided on an end surface of the cylinder that is adjacent to the inner cylinder and has a larger diameter than the inner cylinder, and includes the enclosure and the friction plate. A cylindrical covering body to be covered, a heat-resistant sealing member provided free from the inner cylindrical body on the cylindrical outer wall portion of the inner cylindrical body, and the heat-resistant sealing member are enclosed, and the outer peripheral portion of the inner cylindrical body is surrounded by An enclosure to be positioned; a pressing plate provided in the enclosure for pressing the heat-resistant sealing member; a first spring shaft group provided in the enclosure and extending in parallel with the axial direction of the transport unit; A plurality of first springs that are respectively interposed in one spring shaft group and urge the pressing plate in the direction of the end face; a ring-shaped friction plate that protrudes in a radial direction from the enclosure; A hole is provided in the inner wall and the enclosure is located in the center. Two disc-shaped holding plates with the friction plate in between, and two disc-shaped heat-resistant and wear-resistant materials that are held by the two holding plates and sandwich the friction plate at the center freely And a second spring shaft group provided on the covering body and extending in parallel with the axial direction of the transport unit, and the inner cylinder in the two holding plates, respectively, interposed between the second spring shaft group and the second spring shaft group It is characterized by comprising a seal structure comprising a plurality of second springs for urging the holding plate far from the end face of the body in the end face direction.

  According to the drying apparatus according to the present invention, the inner wall of the inner cylinder that moves the object to be dried coming from the transport unit is provided with the internal screw and a plurality of ridges extending linearly from the inlet side to the outlet side. As the inner cylinder rotates, the object to be dried moves on the ridge and moves from the lower part to the upper part.Before reaching the uppermost part, the dried object falls to the lower part and moves again to the upper part. Compared with the stirring only by the screw and the movement in the outlet direction, many objects to be dried are stirred, and the drying state can be advanced efficiently.

  In the drying apparatus according to the present invention, the outer wall of the inner cylindrical body is provided with a plurality of ridges extending linearly from the inlet side to the outlet side, and the external screw is disposed on the ridges. The inside of the enclosure is agitated to prevent heat bias, and heat is efficiently transferred to the inner cylinder.

  The drying apparatus according to the present invention includes a conduit that guides the gas generated in the hopper and the dry distillation gas generated in the inner cylinder from the outlet side to the crater side of the burner, so that the generated combustible gas can be used without waste. At the same time, a deodorizing effect can be expected.

  According to the drying apparatus according to the present invention, the cylindrical outer wall portion of the transport unit is provided with a heat-resistant sealing member that is provided free from the transport unit, and this portion is sealed, and the outer peripheral portion of the transport unit The ring-shaped friction plate projecting in the radial direction from the enclosure positioned at the position is sandwiched freely by two disc-shaped holding plates, and the holding plate far from the end surface of the inner cylindrical body in the two holding plates is Since a seal structure including a plurality of springs biased in the direction of the end face is provided, the dry distillation gas can be blocked from the outside without leakage of dry distillation gas from the seal structure portion.

  According to the drying device of the present invention, a seal is made at a portion of the heat-resistant sealing member that is provided free from the inner cylinder and the envelope that surrounds the heat-resistant sealing member and is positioned on the outer peripheral portion of the inner cylinder. In addition, a ring-shaped friction plate protruding in a radial direction from the enclosure is disc-shaped and freely sandwiched between two heat-resistant and wear-resistant materials, and is far from the end surface of the inner cylinder in the two holding plates. Since the seal structure for biasing the holding plate with the second spring in the end face direction is provided, the dry distillation gas can be shut off from the outside without leakage of the dry distillation gas from the seal structure portion.

  Hereinafter, embodiments of a drying apparatus according to the present invention will be described with reference to the accompanying drawings. In each figure, the same components are denoted by the same reference numerals and redundant description is omitted. FIG. 1 shows a side view of an embodiment of a drying apparatus according to the present invention, FIG. 2 shows a plan view, and FIGS. 3 and 4 show sectional views. The drying apparatus according to the present embodiment includes a hopper 11 for charging an object to be dried, and has a cylindrical shape that receives the object to be dried from above at the bottom of the hopper 11 that has been narrowed to a smaller diameter as it progresses downward in a horn shape. A transport unit 12 is provided.

  A feeding screw 13 is provided in the transport unit 12. The feeding screw 13 is pivotally supported at both ends of the transport unit 12, receives the rotation of the motor 14 through the belt (or chain) 15, and rotates to move the drying object in the right direction in FIG. 1. One end side of the transport unit 12 is inserted on the inlet side of the inner cylinder 21, and a dry object is dropped into the inner cylinder 21 from the discharge port 16 provided on one end side of the transport unit 12.

  An introduction pipe 18 is connected to the other end side of the transport unit 12 via a rotary valve 17, and the introduction pipe 18 is connected to an exhaust gas pipe 37R. Exhaust gas sent from the introduction pipe 18 to the rotary valve 17 via an exhaust gas pipe 37R connected to the chimney 37B is supplied to the transport unit 12. Thereby, the drying target object of the conveyance part 12 will be extruded by the gas pressure of waste gas toward the discharge port 16 side.

  The inner cylinder 21 is made of, for example, iron, and includes inner screws 22A and 22B on the inner wall. The internal screw 22A is provided in the vicinity of the discharge port 16 of the transport unit 12, and the internal screw 22B is provided in the vicinity of the terminal end 21E of the inner cylinder 21, respectively. Has a function of moving to the right. On the outside of the inner cylinder 21, an outer envelope 31 including a cylindrical part 31 a concentric with the inner cylinder 21 in many parts and a heat chamber portion 31 b that generates hot gas for heating the inner cylinder 21. Is provided. The inner screw 22C is formed from one end where the inner cylinder 21 is covered by the outer enclosure 31, and is provided up to the vicinity provided at the end portion 21E of the inner cylinder 21, compared to the inner screws 22A and 22B. It is steep.

  A plurality of fins forming the internal screw 22C are formed, and each strip is continuous. As shown in FIG. 5, twelve protrusions 22 </ b> S that extend linearly so as to sew between the internal screws 22 </ b> C from the inlet side to the outlet side are provided on the inner wall of the inner cylinder 21. For this reason, as the inner cylinder 21 rotates, the object to be dried is moved up by the fins of the inner screw 22C or by the protrusions 22S while being scraped up to the upper side of the inner cylinder 21 before reaching the top. In the same way, the movement of the object to be dried is repeated until it is moved to the upper part, and it has sufficient functions to remove moisture and carbonize almost all objects to be dried by humidity control. And a sufficient amount of time is taken to reach the vicinity of the end portion 21E in order to obtain a dry state in which the moisture content is about half (50%) to one third (30%) of the initial content. It is configured. In FIG. 4, the protrusion 22S is not drawn.

  A drive mechanism 25 </ b> A that rotates the inner cylinder 21 about its own axis is provided near both ends in the longitudinal direction of the inner cylinder 21. The drive mechanism 25A rotates the inner cylinder 21 by a drive source, and the other side of the drive mechanism 25A is a bearing. For example, as shown in FIG. 4, the drive mechanism 25 </ b> A includes a motor 26, a gear, a belt (or a chain), and the like, and rotates the inner cylinder 21. The bearing contributes to the rotation of the inner cylinder 21. Of course, it is also possible to employ a configuration in which a drive source is provided at the position of the bearing on the end portion 21E side of the inner cylinder 21 and the inner cylinder 21 is rotated at both ends.

  The outer enclosure 31 is made of, for example, iron, and as described above, the inner cylinder 21 is rotated inside, and the heat insulating material 32 made of a ceramic material is held on the inner wall. The outer wall of the inner cylinder 21 is provided with twelve ridges 33S extending linearly from the inlet side to the outlet side. A screw blade 33A is provided on the protrusion 33S, and the gas in the space with the outer enclosure 31 is stirred by the screw blade 33A. The hot chamber portion 31b is provided with six burners 34A to 34F, each of which is a heavy oil burner.

  For the burners 34A to 34F, air and fuel oil, which is fuel, are sent from a pipe (not shown), mixed and ignited and burned. In this embodiment, heavy oil is used as the fuel, but the present invention is not limited to this, and alcohol, kerosene, light oil, or the like can also be used.

  The crater of the burner 34A is supplied with dry distillation gas generated from the object to be dried from the end portion 21E of the inner cylinder 21 through the dry distillation gas pipe 36C, and gas generated in the hopper 11 through the generation gas pipe 36G. The dry distillation gas is consumed as fuel in the burner 34A in a state of being mixed with fuel gas of heavy oil, so that fuel consumption can be reduced.

  Heat generated by the combustion of fuel in the burners 34A to 34F is stirred by the screw blades 33A and the protrusions 33S, and travels through the gap space between the inner cylinder 21 and the outer envelope 31 to move around the outer periphery of the inner cylinder 21. The exhaust gas is discharged from the chimney 38 via the cyclone 39 via the combustion gas discharge pipes 37A and 37B.

  A discharge chamber 41 for discharging the dried object to be dried is formed on the bottom side of the end portion 21E in the inner cylinder 21, and the outer portion of the outer enclosure 31 is formed below the discharge chamber 41 as shown in FIG. A screw 42 having a shaft in a direction in contact with the circle and scraping the dried object to be dried by rotation is provided, and the rotation of the motor 43 is received via a belt (or chain) 44 to rotate. ing. A discharge port 45 is provided in the lower part of the screw 42, and the dried object to be dried is discharged through the discharge port 45 to a processed product collection unit such as a stacker.

  In the drying apparatus according to the present embodiment, the seal structure shown in FIG. 8 is adopted at the position P1, and the seal structure shown in FIG. 9 is adopted at the positions P2 to P4. FIG. 8 shows the structure at the position P1. A flange 21a that protrudes outward is formed on the peripheral end surface of the rotating inner cylinder 21, and the cylinder 51 is coupled to the flange 21a. Arms 51a projecting outward are attached to six locations around the cylindrical body 51, and a disk-shaped pressing plate 52 is fixed to the tip of the arm 51a.

  The pressing plate 52 is provided with a cylindrical wall portion 53 having the same diameter as the cylindrical body 51 and surrounding the entire periphery. The cylindrical wall portion 53 is provided with a disk-like pressing plate 53d parallel to the pressing plate 52, and a protrusion 53b corresponding to the arm 51a is formed. The tip of the protrusion 53b has a flange portion 53a bent toward the center of rotation and has a shape like an L-shaped metal fitting. The front end of the flange portion 53a is a support plate 53c bent at a right angle, and the support plate 53c is provided with bolts 54 extending in parallel with the rotation axis. A spring 55 is inserted into the bolt 54, and the two doughnut-shaped heat and wear resistant materials 56A and 56B are sandwiched between the spring 55 and the push plates 52 and 53c. The heat and wear resistant material 56 </ b> A is provided with a hole for fitting the tip of the bolt 54.

  Two ring-shaped heat-resistant casters 61 </ b> A and 61 </ b> B are attached to the outer periphery of the transport unit 12 by a cover 62. A plurality of ring-shaped heat-resistant oil dust seals 63 are interposed on the outer periphery of the cover 62, and the heat-resistant oil dust seals 63 are enclosed and held by a frame body 64. A blade ring 65 is provided around the outer peripheral surface of the frame body 64 so that the tip of the blade ring 65 is inserted into a gap that forms the boundary between the two heat-resistant and wear-resistant materials 56A and 56B. The above members are covered with a cylindrical cover 60, and the cylindrical cover 60 is fixed to the flange 21a.

  In the above sealing structure, when the inner cylinder 21 rotates, the cylindrical wall portion 53 fixed via the arm 51 a and the bolt 54 attached to the flange portion 53 a of the cylindrical wall portion 53 are inserted into the bolt 54. The two doughnut-shaped heat and wear resistant materials 56A and 56B sandwiched between the spring 55 and the push plates 52 and 53c sandwich the blade ring 65, but rotate in a free state. Due to this rotation, the heat-resistant casters 61A and 61B, the heat-resistant oil dust seal 63, and the blade ring 65 fluctuate left and right or up and down in FIG. The leakage of combustion gas and dry distillation gas entering the plate 52 side is appropriately prevented.

  FIG. 9 shows the configuration of P4 as a representative in the portions P2 to P4. P <b> 4 indicates a coupling portion between the discharge chamber 41 and the inner cylinder 21, which is a cylinder having a larger diameter than the inner cylinder 21. This portion appears symmetrically via the one-dot chain line in FIG. A base 71 having a flat part 71a that makes a round and a cylindrical part 71b that is perpendicular to this is formed at the edge of the discharge chamber 41 at the joint between the discharge chamber 41 and the inner cylinder 21. The base 71 is provided with a disk-shaped holding body 72 that goes around the outer circumference of the inner cylinder 21.

  The holding body 72 is provided with L-shaped ridges 73a at six equally spaced positions on the circumference, and a container-like enclosure 73 that makes a round along the outer periphery of the inner cylinder 21 is coupled. Has been. A support ring 74 is provided on the outer wall of the holding body 72, and a heat-resistant and wear-resistant material 75a surrounding the outer periphery of the inner cylindrical body 21 in a ring shape is provided between the support ring 74 and the tip portion of the cylindrical portion 71b. Yes.

  The heat-resistant and wear-resistant material 75a is in contact with a friction plate 82 that goes around the outer periphery of the inner cylinder 21 in a ring shape, and the inner cylinder in a ring shape at a position facing the heat-resistant and wear-resistant material 75a via the friction plate 82. A heat-resistant and wear-resistant material 75b surrounding the outer periphery of 21 is provided. The heat-resistant and wear-resistant material 75b is positioned by a pressing plate 76 constituted by a disc-shaped pressing portion 76a and grip plates 76b and 76c located on the inner and outer peripheral portions of the pressing portion 76a.

  A bolt 77 is provided at the tip of the L-shaped protrusion 73a toward the heat and wear resistant material 75b, and a spring 78 is interposed in the bolt 77 to urge the pressing plate 76. A hole is formed at a position where the tip of the bolt 77 hits the heat and wear resistant material 75b. For example, six urging structures using bolts 77 and springs 78 are provided on the peripheral surface.

  In the vicinity of the outer periphery of the inner cylindrical body 21, a cylindrical portion 81a that makes a round along the outer periphery of the inner cylindrical body 21, and a standing portion 81b that is bent from the cylindrical portion 81a to the vicinity of the outer periphery of the inner cylindrical body 21 in an L shape. A surrounding body 81 is provided. A friction plate 82 that wraps around the outer periphery of the inner cylinder 21 in a ring shape is attached to the cylinder portion 81 a of the surrounding body 81.

  A cylindrical body 83 having a tapered portion 83 a is provided between the surrounding body 81 and the inner cylindrical body 21, and a heat-resistant material 84 is interposed in the gap between the cylindrical body 83 and the surrounding body 81 and the inner cylindrical body 21. . A holding plate 85 is coupled to the end of the cylindrical portion 81 a of the surrounding body 81 so as to correspond to the position of the bolt 77. A bolt 86 is provided at the front end of the holding plate 85 so as to be parallel to the bolt 77, and a dish-like body 87 having an L-shaped cross section makes a round along the outer periphery of the inner cylinder 21 at the front end of the bolt 86. Provided in contact with the cylinder 83. A spring 88 is interposed in the bolt 86 to urge the dish-like body 87 toward the cylinder 83. For example, six urging structures by the bolts 86 and the springs 88 are provided on the peripheral surface.

  In the above configuration, when the inner cylinder 21 rotates, the friction plate 82, the surrounding body 81, the cylinder 83, and the like rotate integrally. As the plate rotates, the friction plate 82, the surrounding body 81, the cylinder 83, etc. vibrate left and right. The friction plate 82 is freely held between the heat and wear resistant materials 75a and 75b, and is supported by a spring 78 interposed in the bolt 77. Vibration is absorbed. The surrounding body 81 and the cylindrical body 83 absorb vibrations by a spring 88 interposed in the bolt 86. Heat-resistant and wear-resistant materials 75a and 75b are present on both sides of the friction plate 82, and dry distillation gas is sealed at this seal portion, and a heat-resistant material 84 is interposed in the gap between the cylinder 83 and the enclosure 81 and the inner cylinder 21. It is mounted and sealed.

  Although the sealing shown in FIG. 9 is possible, there is a concern that the heat-resistant material 84 sandwiched between the casing 83 and the inner cylinder 21 may be pressed and deteriorated. Therefore, in addition to the configuration shown in FIG. 9, the configuration shown in FIG. 10 is adopted. As already described, the holding plate 85 coupled to the surrounding body 81 makes a round along the outer periphery of the inner cylindrical body 21.

  Therefore, for example, six axles 91 are provided at equiangular positions on the surface of the holding plate 85 different from the position where the bolts 86 are attached, and casters 92 are interposed on the axles 91. An axle 91 is also provided for the standing portion 81 b of the surrounding body 81, and a caster 92 is interposed on the axle 91. The axles 91 and 91 are linearly coincident shafts, and two casters 92 and 92 are interposed on the shafts, and rotate coaxially.

  By configuring as described above, the six casters 92, 92 are present at the respective positions at the six equiangular positions on the outer periphery of the inner cylindrical body 21, and the casters 92, 92 are present at the respective positions. And supports the friction plate 82 and the like. In a portion surrounded by six equiangular casters 92, 92, the inner cylindrical body 21 rotates, causing the casters 92, 92 to rotate. By the casters 92, 92, it is possible to prevent a large pressing force from being applied to the heat-resistant material 84 interposed between the casing 83 and the inner cylindrical body 21, and it is possible to continue the sealing effect by the heat-resistant material 84 accurately for a long time.

The side view of the Example of the combustion apparatus which concerns on this invention. The top view of the Example of the combustion apparatus which concerns on this invention. The AA sectional view of Drawing 2, and the front view of Drawing 2. CC sectional drawing of FIG. The principal part enlarged view of FIG. The principal part enlarged view of FIG. BB sectional drawing of FIG. Sectional drawing which shows the 1st Example of the seal structure of the combustion apparatus which concerns on invention. Sectional drawing which shows the 2nd Example of the seal structure of the combustion apparatus which concerns on invention. Sectional drawing which shows the structure added to the 2nd Example of the seal structure of the combustion apparatus which concerns on invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Hopper 12 Conveying part 13 Input screw 14 Motor 16 Discharge port 17 Rotary valve 18 Introducing pipe 21 Inner cylinder 22A, 22B, 22C Internal screw 22S Projection 25A Drive mechanism 31 Outer enclosure 31A External screw 31b Heat chamber part 33A Screw blade 33S ridge 34A-34F burner 36C dry distillation gas pipe 36G generated gas pipe 37A combustion gas discharge pipe 38 chimney 39 cyclone 41 discharge chamber 42 screw 43 motor 45 discharge port 51 cylinder body 53 cylindrical wall part 54 bolt 55 spring 56A heat resistance and abrasion resistance Wear material 60 Cylindrical cover 61A Heat resistant caster 62 Cover 63 Heat resistant oil dust seal 65 Blade ring 71 Base 72 Holding body 73 Enclosure 73a Projection 74 Support ring 75a, 75b Heat resistant wear resistant material 76 Press plate 77 Bolt 78 Spring 8 Enclosure 82 friction plates 83 cylindrical body 84 heat-resistant material 85 holding plate 86 bolt 87 servings shaped member 88 spring 91 axle 92 casters

Claims (5)

A hopper for charging the object to be dried;
A transport unit provided with a screw that sends out a drying object from the hopper;
A cylindrical body provided with an inner screw for moving an object to be dried coming from the conveying section and a plurality of protrusions extending linearly from the inlet side to the outlet side on the inner wall, and provided with an outer screw on the outer wall, An inner cylinder that rotates about the axis of the body;
An outer enclosure that is provided outside the inner cylinder, rotatably accommodates the inner cylinder, and has a heat chamber that generates hot gas that heats the inner cylinder;
A burner for overheating the heat chamber;
Exhaust gas supply means for supplying exhaust gas generated by the burner to the screw in the transfer unit from the transfer tip of the object to be dried. The outer wall of the inner cylinder is provided with a plurality of ridges extending linearly from the inlet side to the outlet side, and the external screw is disposed on the ridges. The drying apparatus as described. The drying apparatus according to claim 1 or 2, further comprising a conduit for guiding the gas generated in the hopper and the dry distillation gas generated in the inner cylinder from the outlet side to the crater side of the burner. A heat-resistant seal member provided free from the transfer unit on the cylindrical outer wall of the transfer unit;
An enclosure that surrounds the heat-resistant sealing member and is positioned on the outer periphery of the transport unit;
A ring-shaped friction plate protruding in a radial direction from the enclosure;
A cylindrical covering that is connected to a flange provided on an end surface of the inner cylindrical body and covers the heat-resistant sealing member, the enclosure and the friction plate;
Provided on the inner wall of the covering body, a hole in which the heat-resistant sealing member and the enclosure are located is formed in the center part, and two disc-shaped holding plates in which the friction plate exists,
Two heat-resistant and wear-resistant materials in a disc shape that are held by the two holding plates and freely sandwich the friction plate in the center;
A spring shaft group provided on the covering and extending in parallel with the axial direction of the transport unit;
A plurality of springs interposed between the spring shaft groups and biasing the holding plate far from the end face of the inner cylindrical body in the two holding plates toward the end face. The drying apparatus according to any one of claims 1 to 3. A cylindrical covering that is adjacent to the inner cylinder and connected to a flange provided on an end surface of the cylinder having a larger diameter than the inner cylinder, and covers the enclosure and the friction plate;
A heat-resistant sealing member provided free from the inner cylinder on the cylindrical outer wall of the inner cylinder;
An enclosure that surrounds the heat-resistant sealing member and is positioned on the outer periphery of the inner cylinder;
A pressing plate provided in the enclosure and pressing the heat-resistant sealing member;
A first spring shaft group provided in the enclosure and extending in parallel with the axial direction of the transport unit;
A plurality of first springs respectively interposed in the first spring shaft group and biasing the pressing plate toward the end surface;
A ring-shaped friction plate protruding in a radial direction from the enclosure;
A disc-shaped holding plate provided on the inner wall of the covering body, in which a hole in which the enclosure is located is formed at a central portion, and the friction plate is present between the two;
Two heat-resistant and wear-resistant materials in a disc shape that are held by the two holding plates and freely sandwich the friction plate in the center;
A second spring shaft group provided on the covering and extending in parallel with the axial direction of the transport unit;
A plurality of second springs interposed between the second spring shaft groups and urging the holding plate far from the end face of the inner cylindrical body in the two holding plates toward the end face. The drying apparatus according to any one of claims 1 to 4, further comprising:

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