JP2009222368A - Horizontal rotary drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a horizontal rotary drying machine capable of increasing the processing amount of dried objects by further improving drying efficiency by efficiently drying the dried objects accumulated on a bottom section of a rotary cylinder. <P>SOLUTION: A rotary steam drier 1 comprises the rotary cylinder 10 rotatable around a shaft center C, and a heating pipe 11 positioned in the rotary cylinder 10 for communicating the steam. A gas injection pipe 71 capable of injecting a stirring gas K into the rotary cylinder 10 while guiding the stirring gas K, is disposed on a position along an inner peripheral face of the rotary cylinder 10. A rotary connection pipe 72 connected with the gas injection pipe 71 at its one end, is disposed at an inner peripheral side of a steam supply pipe 61 and a drainage discharge pipe 62 respectively connected with the heating pipe 11. The other end side of the rotary connection pipe 72 is connected with a rotary joint 63, and the other end side of a part corresponding to the rotary connection pipe 72, of the rotary joint 63 is connected to a gas supply source 73 through an air pipe 74. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a horizontal rotary dryer that can efficiently dry a to-be-dried object deposited on the bottom of a rotary cylinder, thereby further improving the drying efficiency and increasing the throughput of the to-be-dried object.

  A so-called steam tube dryer is known as a typical example of a conventional horizontal rotary dryer. As shown in FIG. 4, the steam tube dryer includes a rotating cylinder 110 that is rotatable about an axis, and the object to be dried inserted from one end side of the rotating cylinder 110 while rotating the rotating cylinder 110 is the other end. In the process of discharging from the side, drying is performed in the rotating cylinder 110 by heating steam as external heat for drying.

  More specifically, the rotating cylinder 110 has a length of, for example, 10 m to 30 m, and in the rotating cylinder 110, steam to be dried such as wet powder or granular powder is heated as a heat medium. As the rotating cylinder 110 rotates, it is sequentially moved toward the discharge port 112 while being dried by supplying it into the heating tube 111.

  Therefore, in order to smoothly transfer the raw material from the raw material inlet 121 at one end of the rotary cylinder 110 to the dry product discharge port 112, the rotary cylinder 110 is installed with a slight downward gradient. The rotating cylinder 110 is supported on the supporting rollers 130 and 130 provided on the two bases 131 and 131 via the tires 114 and 114, respectively. It is adjusted by the height and angle of the bases 131 and 131 and the supporting rollers 130 and 130.

  On the other hand, a driven gear 150 is provided around the rotating cylinder 110 in order to rotate the rotating cylinder 110, and a driving gear 153 is engaged with the driven gear 150, and the rotational force of the prime mover 151 is transmitted via the speed reducer 152. Thus, the rotating cylinder 110 rotates around its axis.

  Further, in the steam tube dryer, a large number of heating pipes 111 are disposed between both end plates of the rotary cylinder 110 in parallel with the axial center, and heating steam as a heat medium is supplied to the rotary joint 160 in these heating pipes 111. After being supplied through the attached heat medium inlet pipe 161 and distributed to each heating pipe 111, it is discharged through the heat medium outlet pipe 162.

  On the other hand, a gas blowing port 113 for blowing carrier gas is provided at the end of the rotating cylinder 110 so as to communicate with the discharge port 112, and the other end side is accompanied by evaporating gas generated in the rotating cylinder 110. This carrier gas is discharged from the gas discharge port 122.

By the way, as a means for improving the drying efficiency in the horizontal rotary dryer, the carrier gas corresponding to the drying characteristics of the object to be dried is supplied to the reduced rate drying section and the constant rate drying section, and the water vapor generated from the object to be dried is used. A technique for reducing the vapor pressure is known. And the following patent document 1 exists as what aimed at the improvement of a drying rate according to reducing this vapor pressure in each drying area.
JP 2004-353927 A

  However, in the structure disclosed in Patent Document 1, the carrier gas is supplied along a direction substantially parallel to the rotation axis for rotating the rotating cylinder, thereby reducing the vapor pressure and promoting the drying. From the viewpoint of efficiency, it was not enough. For example, in the horizontal rotary dryer of Patent Document 1, contact between the object to be dried deposited on the bottom of the rotating cylinder and the carrier gas is insufficient, and the drying efficiency of the object to be dried could not be further increased. .

  Therefore, the main problem of the present invention is to propose a horizontal rotary dryer that can efficiently dry the objects to be dried deposited on the bottom of the rotating cylinder, thereby further improving the drying efficiency and increasing the amount of objects to be dried. There is to do.

A horizontal rotary dryer according to a first aspect of the present invention includes a rotating cylinder that is rotatable about an axis, and a heating tube that is located in the rotating cylinder and allows a heat medium to communicate therewith, and rotates the rotating cylinder and the heating tube. While in the process of discharging the material to be dried inserted from one end side of the rotating cylinder from the other end side, it is a horizontal rotary dryer that dries the material to be dried by the heat medium in the heating tube,
A gas injection pipe capable of injecting the stirring gas into the rotating cylinder while guiding the stirring gas sent from the gas supply source existing outside;
A heat medium supply / exhaust pipe that rotates integrally with the heating pipe and that can communicate with the heat pipe and supply / discharge the heat medium;
A rotary connection pipe provided in the heat medium supply / discharge pipe and having one end communicating with the gas injection pipe and the other end connected to a gas supply source via a rotary joint;
It is characterized by having.

The operation of the horizontal rotary dryer according to claim 1 will be described below.
According to this claim, while rotating a rotating cylinder rotatable around an axis and a heating pipe positioned in the rotating cylinder for communicating a heat medium, an object to be dried is charged from one end of the rotating cylinder. Thus, the object to be dried is dried by the heat of the heat medium in the heating tube, and the object to be dried is discharged from the other end side of the rotating cylinder.

  Further, the stirring gas supplied from the gas supply source is injected into the rotating cylinder while the gas injection pipe guides the stirring gas. At this time, one end of the rotary connection pipe provided in the heat medium supply / discharge pipe rotating integrally with the heating pipe is communicated with the gas injection pipe, and the other end of the rotary connection pipe is supplied with gas via the rotary joint. The stirring gas is supplied from the gas supply source to the gas injection pipe.

  That is, according to this claim, the rotation connecting pipe is arranged in the heat medium supply / discharge pipe, so that the heat of the heat medium in the heating pipe is transmitted and can be used. Furthermore, the stirring gas is reliably supplied from the gas supply source to the gas injection pipe by connecting the rotating gas injection pipe and the fixed gas supply source via the rotary connection pipe and the rotary joint. The material to be dried, which is supplied and deposited on the bottom of the rotating cylinder, is stirred by the stirring gas.

  Furthermore, the stirring gas injected from the gas injection pipe is substantially injected into the space existing between the objects to be dried, such as wet powder and granular powder. The stirring gas, which is a gas dried in the space, is replaced by a gas containing water vapor generated from the inside of the object to be dried. As a result, the difference between the vapor pressure due to moisture in the object to be dried and the vapor pressure of the stirring gas existing in the space between the objects to be dried substantially increases, so that it accumulates at the bottom of the rotating cylinder. The inside of the dried object is also dried by this stirring gas.

  As described above, according to the present invention, not only the object to be dried is stirred in this way, but also the inside of the object to be dried deposited on the bottom of the rotating cylinder is dried by jetting the dry stirring gas, As a result of increasing the drying efficiency of the object to be dried, the drying capacity is improved, and the processing amount of the object to be dried by the horizontal rotary dryer can be increased.

The operation of the horizontal rotary dryer according to claim 2 will be described below.
The horizontal rotary dryer according to the present invention has the same effect as that of the first aspect. However, the present invention has a configuration in which the blowing direction of the stirring gas from the gas injection pipe is a tangential direction opposite to the rotation direction of the rotating cylinder.

  That is, according to the present claim, the blowing direction of the stirring gas from the gas injection pipe is the above-described blowing direction, so that the material to be dried after the gas injection pipe has passed and stirred is further injected with the stirring gas. Can be dried. Accordingly, the object to be dried deposited on the bottom of the rotating cylinder can be more reliably stirred and the stirring gas can be injected onto the object to be dried. As a result, the drying efficiency of the object to be dried can be further enhanced.

The operation of the horizontal rotary dryer according to claim 3 will be described below.
The horizontal rotary dryer according to the present invention has the same effects as those of the first and second aspects. However, in the present invention, the rotary connecting pipe is configured to communicate with the gas injection pipe through a pipe branching portion provided on the outer periphery of the heat medium supply / discharge pipe.
That is, according to this claim, the contact area of the rotary connecting pipe with respect to the heat medium supply / discharge pipe capable of supplying and discharging the heat medium can be increased, and as a result, the stirring gas heated to a higher temperature is gasified It can be injected from the injection tube.

  As described above, according to the above-described configuration of the present invention, by efficiently drying the object to be dried deposited on the bottom of the rotating cylinder, it is possible to further improve the drying efficiency and increase the processing amount of the object to be dried. It has the outstanding effect that a formula dryer can be provided.

  A rotary steam dryer which is a steam tube dryer according to a first embodiment of the horizontal rotary dryer of the present invention is shown in FIGS. 1 and 2, and the present embodiment will be described with reference to these drawings. First, the rotary steam dryer 1 according to the present embodiment includes a rotating cylinder 10 that is rotatable about an axis C, and a heating tube 11 that is located in the rotating cylinder 10 and communicates steam.

  In this rotary cylinder 10, the object to be dried H, which is wet powder or granular powder, introduced from the inlet on one end of the rotary cylinder 10 is brought into contact with the heating tube 11 heated by a heat medium (for example, saturated steam). In addition to being dried, the rotating cylinder 10 is installed with a downward slope, so that it is sequentially moved to the other end side and continuously discharged from the discharge port. A large number of the heating tubes 11 are arranged in parallel with the axial center between the end plates at both ends of the rotating cylinder 10. Gases such as steam, heated hot water, A liquid such as oil is supplied to exchange heat with the material to be dried H in the rotary cylinder 10.

  Further, a charging chute (not shown) is connected to the rotating cylinder 10 so as to be relatively rotatable, and the material to be dried H passes through the charging chute fixed from the raw material charging port 121 shown in FIG. It is inserted into the rotary cylinder 10. That is, one end of the charging chute is inserted into the rotary cylinder 10 through an opening formed in the center of the inlet side end plate, and the to-be-dried object H introduced from the charging inlet gravitates through the charging chute. Thus, it slides down and is inserted into the rotary cylinder 10.

  As mentioned above, in this Embodiment, in the process of discharging the to-be-dried material H inserted from the one end side of the rotary cylinder 10 from the other end side, rotating the rotary cylinder 10 and the heating pipe 11, the steam in the heating pipe 11 is discharged. Thus, the material to be dried H is dried. In addition, the form of the charging portion can be the same form as in FIG. 4, and can take other known forms. Further, the rotation mechanism of the rotary steam dryer 1 can take the same form as in FIG. 4 and can take other known forms.

  On the other hand, as shown in FIG. 1 and FIG. 2, scraping blades 13 for lifting are radially provided on the end plate portion 12 on the discharge port side on the other end side (the discharge side of the object to be dried) of the rotating cylinder 10. Are provided at regular intervals. Furthermore, an outlet portion 20 having openings 21 and 22 at an end portion in the other end direction (right direction in FIG. 1) of the rotating cylinder 10 is integrally provided at the center portion of the end plate portion 12. The material to be dried H is discharged from the outlet portion 20.

  A cylindrical cylindrical partition wall 23 for partitioning the outlet section 20 into an inner peripheral side and an outer peripheral side is disposed in the outlet unit 20, and the outer peripheral side of the cylindrical partition wall 23 sends out a material to be dried H. The inner circumferential side of the cylindrical partition wall 23 is a gas passage L2 through which the gas G as the carrier gas passes.

  The delivery passage L1 is provided with a screw blade 24 which is a blade for delivering the material H to be dried toward the opening 21. Similarly, the gas passage L2 is also provided with a cover toward the opening 22. A ribbon screw 25 for delivering the dried product H is provided. The blades of the delivery passage L1 may be, for example, paddle-shaped blades instead of the screw blades 24, or may be simply a delivery passage of only space without providing the blades.

  Further, a portion adjacent to the outlet portion 20 has a discharge port 31A for discharging the material to be dried H on the lower side, and a gas injection port 31B for blowing a gas G as a carrier gas into the rotary cylinder 10. Is provided on the upper side. In other words, in the present embodiment, the outlets 21 and 22 of the outlet part 20 are connected to the outlet 31A and the gas inlet 31B of the outlet casing 31, respectively.

  Here, as the gas G, an appropriate gas such as air or an inert gas can be selected, and the blowing pressure is preferably blown by pressurization from the viewpoint of preventing intrusion of outside air. And finally, this gas G is mainly discharged | emitted, for example from the gas discharge port 122 shown in FIG. Further, a part thereof is discharged from the discharge port 31 </ b> A for discharging the material to be dried H together with the material to be dried H. However, a part of the gas G can be reused as a carrier gas after being recovered and separated from the material to be dried H. The discharge casing 31 and the outlet portion 20 are relatively rotatable while being sealed by a seal portion 32 interposed between the discharge casing 31 and the outer surface of the outlet portion 20.

  On the other hand, the central portion of the end plate portion 12 that forms the end portion of the rotating cylinder 10 is integrally provided with a coaxial pipe 60 in which the steam supply pipe 61 and the drain discharge pipe 62 are coaxial with each other. The coaxial pipe 60 rotates integrally with the rotary cylinder 10 and the heating pipe 11. The coaxial pipe 60 is disposed in the cylindrical partition wall 23 and the discharge casing 31 so as to extend through the cylindrical partition wall 23 and the discharge casing 31.

  Furthermore, one end side of the steam supply pipe 61 is connected to the inlet header part of the heating pipe 11 in the end plate part 12 via the pipe branching part 40 and the first connecting pipe 41, and the steam supply pipe 61 is connected to the steam supply pipe 61. Steam S is supplied into the heating pipe 11 via the inlet header. A drain discharge pipe 62 exists on the inner peripheral side of the steam supply pipe 61, and one end side of the drain discharge pipe 62 is heated in the end plate part 12 via the pipe branching part 40 and the second connection pipe 42. It is connected to the outlet header portion of the pipe 11, and the drain generated in the heating pipe 11 is discharged by the drain discharge pipe 62 through the outlet header portion.

  As described above, the steam supply pipe 61 and the drain discharge pipe 62 are connected to the heating pipe 11, respectively. Accordingly, the steam supply pipe 61 and the drain discharge pipe 62 that can supply and discharge steam are connected to the heat medium. A supply / exhaust pipe is formed.

  In addition, at the position along the inner peripheral surface of the rotary cylinder 10, six gas injection pipes 71 capable of injecting the stirring gas K into the rotary cylinder 10 while guiding the stirring gas K are equally spaced in the circumferential direction. Is arranged in. That is, the six gas injection pipes 71 are respectively formed with holes so that the stirring gas K can be injected into the rotary cylinder 10 as shown in FIG. The gas injection pipes 71 are bent toward the center of the rotary cylinder 10 in the vicinity of the end plate part 12 and connected to the pipe branching section 40, and the gas injection pipes 71 are rotated by the rotary cylinder 10. It is designed to rotate in sync with. Note that the number of gas injection pipes need not be limited to six, and can be selected as appropriate.

  On the inner peripheral side of the steam supply pipe 61 and the drain discharge pipe 62, a rotary connection pipe 72 having one end connected to the gas injection pipe 71 is disposed. That is, in the coaxial pipe 60, the steam supply pipe 61, the drain discharge pipe 62, and the rotary connection pipe 72, which are these three pipes, are configured to extend coaxially. Further, one end side of the rotary connecting pipe 72 located at the center is bent and extended to the outer peripheral surface of the pipe branching section 40 via the end of the pipe branching section 40. And, it is connected to the gas injection pipe 71 through a space 40 </ b> A formed inside the pipe branching section 40.

  Further, the other end of the coaxial pipe 60 is rotatably supported by the steam supply pipe 64 and the drain discharge pipe 65 via a rotary joint 63A such as a rotary joint. Accordingly, the steam supply pipe 61 is communicated with the steam supply pipe 64 via the rotary joint 63A, and the drain discharge pipe 62 is communicated with the drain discharge pipe 65 via the rotary joint 63A.

  The other end side of the rotary connection pipe 72 is also connected to the rotary joint 63B, and the other end side of the part corresponding to the rotary connection pipe 72 of the rotary joint 63 supplies the stirring gas K via the air supply pipe 74. Connected to a gas supply source 73. The air supply pipe 74 is branched from the gas supply source 73 and is also connected to a gas inlet 31B for injecting the gas G into the rotary cylinder 10. A valve 75 that can be stopped is arranged. For this reason, the gas sent out from the gas supply source 73 is also used as a carrier gas.

  The gas supply source 73 may be other equipment that exhausts exhaust gas other than the rotary steam dryer 1 in addition to a blower or a compressor such as a blower or a compressor that is a gas supply source. It is also conceivable to apply the exhaust gas discharged from other equipment as the stirring gas K. These supply sources may also be used as the carrier gas supply source in the same manner as described above.

  That is, in the present embodiment, one end of the rotary connection pipe 72 is connected to the gas injection pipe 71 that can be injected into the rotary cylinder 10, and the other end of the rotary connection pipe 72 connects the rotary joint 63 and the air supply pipe 74. And a gas supply source 73.

  As described above, in the present embodiment, as shown in FIG. 1, the gas G, which is the carrier gas, is sent from the gas supply source 73 to the inner peripheral side of the cylindrical partition wall 23 from the gas inlet 31 </ b> B at the top of the discharge casing 31. The However, unlike the present embodiment, when the gas G contains a reuse gas, dust or the like derived from an object to be dried is also contained in the gas G. Even in this case, since the ribbon screw 25 is arranged in the gas passage L2 on the inner peripheral side of the cylindrical partition wall 23 in which the gas G is charged, the object to be dried mixed in the gas G is provided. Of the derived dust and the like, the dust and the like accumulated on the cylindrical partition wall 23 is discharged by the ribbon screw 25.

  On the other hand, in the present embodiment, the ribbon screw 25 is fixed to the cylindrical partition wall 23 by welding, and the vicinity of the drain discharge pipe 62, which is the central portion of the gas passage L2, is a cavity. Therefore, the gas G passes through the hollow portion and is inserted into the rotary cylinder 10 without being obstructed by the ribbon screw 25, and the dust and the like deposited on the cylindrical partition wall 23 out of the powder contained in the gas G is discharged by the ribbon screw 25. Is done.

  Furthermore, since the ribbon screw 25 rotates as the rotary cylinder 10 rotates, the material to be dried H captured by the ribbon screw 25 is sent toward the opening 21 by the feeding action of the ribbon screw 25. Then, it is discharged into the discharge casing 31. The discharged to-be-dried object H is discharged from the discharge port 31A below the discharge casing 31 by free fall.

  On the other hand, as the rotating cylinder 10 rotates, the screw blade 24 also rotates around the axis, so that the material to be dried H is sent toward the opening 21 by the feeding action of the screw blade 24 and discharged from the opening 21. Eventually, it is dropped into the discharge casing 31 by its own weight, and discharged from the discharge port 31A to the outside of the machine.

Next, the operation of the rotary steam dryer 1 according to the present embodiment will be described.
According to the present embodiment, the rotating cylinder 10 that is rotatable around the axis C and the heating pipe 11 that is located in the rotating cylinder 10 and that allows the steam to communicate with each other are rotated from one end side of the rotating cylinder 10. By inserting the dried material H, the material to be dried H is dried by the heat of the steam in the heating tube 11, and the material to be dried H is discharged from the other end side of the rotating cylinder 10.

  Further, the stirring gas K supplied from the gas supply source 73 is injected into the rotating cylinder 10 while being guided by the gas injection pipe 71 that rotates in synchronization with the rotation of the rotating cylinder 10. At this time, one end of the rotary connection pipe 72 provided in the steam supply pipe 61 and the drain discharge pipe 62 rotating integrally with the heating pipe 11 is connected to the gas injection pipe 71, and The end is connected to the gas supply source 73 via the rotary joint 63 and the air supply pipe 74, and the stirring gas K is supplied from the gas supply source 73 to the gas injection pipe 71.

  That is, according to the present embodiment, the rotation connection pipe 72 is arranged in the steam supply pipe 61 and the drain discharge pipe 62, so that the heat of the steam in the heating pipe 11 is transmitted and used. It becomes possible. Furthermore, the gas injection pipe 71 is connected from the gas supply source 73 by connecting the rotating gas injection pipe 71 and the fixed gas supply source 73 via the rotary connection pipe 72 and the rotary joint 63. The stirring gas K is reliably supplied to this, and the material to be dried H deposited on the bottom of the rotating cylinder 10 is stirred by this stirring gas K.

  Then, the stirring gas K injected from the gas injection pipe 71 is substantially injected into the space existing between the objects to be dried H, and the gas is dried in this space along with this. The stirring gas K is replaced by a gas containing water vapor generated from the inside of the material H to be dried. As a result, the difference between the vapor pressure due to moisture in the material to be dried H and the vapor pressure of the stirring gas K existing in the space between the materials to be dried H is substantially increased. The inside of the material to be dried H deposited on the bottom of the substrate is also dried by the stirring gas K.

  Accordingly, not only the object to be dried H is stirred in this way, but also the inside of the object to be dried H deposited on the bottom of the rotary cylinder 10 is dried by the injection of the dry stirring gas K, so that the rate-decreasing drying section. As a result, the drying efficiency is improved as a result of increasing the drying efficiency of the to-be-dried object H, and the processing amount of the to-be-dried object H by the rotary steam dryer 1 can be increased.

  On the other hand, in the present embodiment, the gas supply source 73 is also connected to the gas blowing port 31 </ b> B through which the gas G is blown through the air supply pipe 74, so that the gas that is the carrier gas fed into the rotary cylinder 10 It also serves as a G supply source. That is, according to the present embodiment, the gas supply source 73 also serves as the supply source of the gas G fed into the rotary cylinder 10, so that the structure of the rotary steam dryer 1 is not more complicated than necessary, and the gas As a result of the reduction in consumption, the production cost of the rotary steam dryer 1 is reduced, and resource saving is achieved.

  Furthermore, according to the present embodiment, the gas injection pipe 71 rotates in synchronization with the rotation of the rotating cylinder 10, so that the object to be dried H deposited on the bottom of the rotating cylinder 10 with the rotation of the rotating cylinder 10 is obtained. On the other hand, the stirring gas K can be more reliably injected. In connection with this, the to-be-dried material H is stirred more efficiently, so that the drying efficiency of the to-be-dried material H can be further increased.

  Next, the rotary steam dryer which concerns on 2nd Embodiment of the horizontal rotary dryer of this invention is shown in FIG. 3, This Embodiment is demonstrated referring this figure. In addition, the same code | symbol is attached | subjected to the member same as the member demonstrated in 1st Embodiment, and the duplicate description is abbreviate | omitted.

  In the first embodiment, a hole is provided in the gas injection pipe 71 so that the stirring gas K is injected toward the center side of the rotary cylinder 10, whereas in the present embodiment, a hole is provided. By changing the arrangement of the parts, the blowing direction of the stirring gas K from the gas injection pipe 71 is set as the tangential direction opposite to the rotation direction R of the rotary cylinder 10. That is, according to the present embodiment, not only the gas injection pipe 71 rotates in synchronization with the rotation of the rotary cylinder 10, but also the blowing direction of the stirring gas K from the gas injection pipe 71 is the rotation direction of the rotary cylinder 10. The tangential direction is opposite to R.

  Thus, when the gas injection pipe 71 is rotated and positioned at the bottom of the rotary cylinder 10, the gas injection pipe 71 is blown out in the tangential direction opposite to the rotation direction R of the rotary cylinder 10. Can be further dried by jetting the stirring gas K. Along with this, as a result that the material to be dried H deposited on the bottom of the rotating cylinder 10 can be more reliably stirred and the stirring gas can be injected onto the material to be dried, the drying efficiency of the material to be dried H is further increased.

  On the other hand, in the present embodiment, although the air supply pipe 74 branches off from the gas supply source 73, the steam supply for supplying the steam S into the heating pipe 11 instead of being connected to the gas inlet 31B. It is connected to the pipe 64. That is, according to the present embodiment, the structure of the rotary steam dryer 1 is not complicated more than necessary, and the gas consumption is reduced. As a result, the manufacturing cost of the rotary steam dryer 1 is reduced and resource saving is achieved. Will be achieved.

  Unlike the above embodiments, when a rotary valve is installed below the discharge port 31A for discharging the material to be dried H, the vent gas of the rotary valve may be used as a gas supply source. good.

It is principal part sectional drawing which shows the rotary steam dryer which concerns on the 1st Embodiment of this invention. FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1. It is a conceptual perspective view of a horizontal rotary dryer.

Explanation of symbols

1 Rotary steam dryer (Horizontal rotary dryer)
10 Rotating cylinder 11 Heating pipe 61 Steam supply pipe (heat medium supply / discharge pipe)
62 Drain discharge pipe (heat medium supply / discharge pipe)
63 Rotating joint 71 Gas injection pipe 72 Rotating connection pipe 73 Gas supply source

Claims (3)

A rotating cylinder that is rotatable around an axis and a heating tube that is located in the rotating cylinder and communicates with a heat medium, and that is to be dried inserted from one end of the rotating cylinder while rotating the rotating cylinder and the heating tube In the process of discharging the object from the other end, a horizontal rotary dryer that dries the object to be dried by the heat medium in the heating tube,
A gas injection pipe capable of injecting the stirring gas into the rotating cylinder while guiding the stirring gas sent from the gas supply source existing outside;
A heat medium supply / exhaust pipe that rotates integrally with the heating pipe and that can communicate with the heat pipe and supply / discharge the heat medium;
A rotary connection pipe provided in the heat medium supply / discharge pipe and having one end communicating with the gas injection pipe and the other end connected to a gas supply source via a rotary joint;
A horizontal rotary dryer characterized by comprising:   2. The horizontal rotary dryer according to claim 1, wherein the blowing direction of the stirring gas from the gas injection pipe is a tangential direction opposite to the rotation direction of the rotary cylinder.   The horizontal rotary dryer according to claim 1 or 2, wherein the rotary connection pipe communicates with a gas injection pipe through a pipe branching portion provided on an outer periphery of the heat medium supply / discharge pipe.

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