WO2015156205A1 - Horizontal rotary dryer - Google Patents

Horizontal rotary dryer Download PDF

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Publication number
WO2015156205A1
WO2015156205A1 PCT/JP2015/060495 JP2015060495W WO2015156205A1 WO 2015156205 A1 WO2015156205 A1 WO 2015156205A1 JP 2015060495 W JP2015060495 W JP 2015060495W WO 2015156205 A1 WO2015156205 A1 WO 2015156205A1
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WO
WIPO (PCT)
Prior art keywords
heating tube
tube core
rotating cylinder
heating
arrangement
Prior art date
Application number
PCT/JP2015/060495
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French (fr)
Japanese (ja)
Inventor
洋一 中田
Original Assignee
月島機械株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 月島機械株式会社 filed Critical 月島機械株式会社
Priority to CN201580003849.7A priority Critical patent/CN105899901B/en
Publication of WO2015156205A1 publication Critical patent/WO2015156205A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/30—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotary or oscillating containers; with movement performed by rotary floors
    • F26B17/32—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotary or oscillating containers; with movement performed by rotary floors the movement being in a horizontal or slightly inclined plane

Definitions

  • the present invention relates to a horizontal rotary dryer that improves the drying speed.
  • Steam dryers hereinafter referred to as “STD”), call-in tubes (Patent Document 1), rotary kilns, and the like are frequently used as dryers for drying workpieces such as coal and ore.
  • the coal and ore are used as raw materials for steelmaking and refining, power generation fuel, etc., and since it is required to process them stably and in large quantities, each of the above-mentioned dryers is a dryer that meets this requirement. It has been adopted.
  • STD indirectly heats the object to be treated, it has high thermal efficiency and a large amount of treatment per unit volume. Moreover, since the size can be increased, it is suitable for the demand for mass processing.
  • the call-in tube also indirectly heats the object to be processed, so that the heat efficiency is high and the processing amount per unit volume is large as in the case of the STD.
  • the processing amount per unit volume is large as in the case of the STD.
  • Rotary kilns have the disadvantage of poor thermal efficiency compared to indirect heating because they are dried directly by applying hot air to the workpiece.
  • the exhaust treatment facility becomes very large. For this reason, STD has an advantage as a dryer for processing a large amount of objects to be processed.
  • an object of the present invention is to improve the drying speed of the object to be processed by the dryer.
  • a supply port for the object to be processed is provided on one end side, and a discharge port for the object to be processed is provided on the other end side.
  • a rotating cylinder rotatable around the axis and a number of heating tubes through which a heating medium passes are provided in the rotating cylinder.
  • a plurality of the heating tubes are arranged in the circumferential direction and the radial direction so as to form a substantially concentric circle around the axis of the rotating cylinder, and a gap is provided between each heating tube,
  • the connecting line that connects the first reference heating tube core to the second reference heating tube core on the center side circle is one of the following arrangement forms (1) or (2) or an arrangement form combining these.
  • the heating tube is arranged in the selected arrangement form selected: (1) Each heating tube core is located on a straight line L1 directly connecting the first reference heating tube core and the second reference heating tube core, and further, the radiation radiation passes through the first reference heating tube core.
  • the first reference form in which the second reference heating tube core is located behind the rotating cylinder in the rotation direction
  • Each heating tube core is positioned on a curve L2 that connects the first reference heating tube core and the second reference heating tube core, and the rotating cylinder becomes closer to the second reference heating tube core.
  • a second arrangement in which the second reference heating tube core is positioned rearward in the rotation direction of the rotating cylinder with respect to radial radiation passing through the first reference heating tube core.
  • the heating tube 11 is in the first arrangement form having a slanting linear shape or the second arrangement form having a curved shape, so that the direction in which the workpiece W falls and the workpiece W are between the heating tubes 11
  • the entering direction approximates, and the workpiece W that has fallen enters the gaps between the plurality of heating tubes 11 and 11 without greatly changing the moving direction.
  • the workpiece W that has entered the gap between the heating tubes 11 and 11 flows from the inside to the outside of the rotating cylinder 10 and reaches the cylinder wall of the rotating cylinder 10.
  • the workpiece W quickly enters the gap between the heating tubes 11 and does not stay outside the heating tube 11 (center side of the rotating cylinder 10), and is heated with the workpiece W. Since the contact of the tube 11 is improved, the drying efficiency can be improved. Moreover, since the contact area of the to-be-processed object W and the heating pipe
  • the workpiece W smoothly enters the gap between the heating tubes 11, 11, when the workpiece W falls, the impact received by the heating tube 11 from the workpiece W is reduced.
  • the diameter of the heating tube 11 must be increased in order to withstand the impact of dropping, but the diameter of the heating tube 11 can be reduced by the present invention, and the number of the heating tubes 11 can be increased. As a result, the heat transfer area of the heating tube 11 increases as a whole, and the drying efficiency can be improved.
  • the drying speed of the object to be processed by the dryer can be improved. Further, as a result of the improvement of the drying speed, the amount of drying treatment per dryer size (shell diameter) can be increased. In other words, the size of the apparatus per processing amount can be reduced.
  • FIG. 1 is a side view of a horizontal rotary dryer according to the present invention. It is the side view which showed the screw feeder and its periphery. It is an enlarged view (side view) of the other end side of a rotating cylinder. It is a side view of the horizontal rotary dryer (modification) concerning the present invention.
  • FIG. 6 is a sectional view taken along line XX in FIG. 5. It is a side view in case a supply system is a chute type. It is a side view in case a supply system is a vibration trough type. It is the example which made the shape of the cross section of the rotation cylinder the rectangle.
  • the object to be processed W is preferably a material whose surface is not sticky and has low adhesion.
  • FIG. 1 shows a table quoted from FIG. 5 on page 17 of the manual 17 of the Japanese Powder Industrial Technology Association standard SAP15-13, 2013.
  • the present invention what is in the area surrounded by the dotted line in FIG. 1, specifically dry (dry), pendular area (suspended area), funicular area 1 (corrugated area 1), funicular area 2 (corrugated area 2)
  • dry (dry) specifically dry
  • pendular area suspended area
  • funicular area 1 corrugated area 1
  • funicular area 2 corrugated area 2
  • FIG. 2 the structure of this horizontal rotary dryer has a cylindrical rotating cylinder 10, and is installed so that the axis of the rotating cylinder 10 is slightly inclined with respect to the horizontal plane. One end of the rotating cylinder 10 is positioned higher than the other end. Below the rotating cylinder 10, two support units 20 and a motor unit 30 are installed so as to support the rotating cylinder 10, and the rotating cylinder 10 is rotated around its own axis by the motor unit 30. It is supposed to be free.
  • the rotating cylinder 10 is configured to rotate in one direction.
  • the direction can be arbitrarily determined. For example, as shown in FIG. 6, when viewed from one end side (supply port side of the workpiece W) to the other end side (discharge port side of the workpiece W), It can be rotated clockwise (arrow R direction).
  • a plurality of heating tubes 11 are arranged in the circumferential direction and the radial direction so as to form a concentric circle with respect to the axis of the rotating cylinder 10. This arrangement will be described in detail later.
  • the heating tube 11 is warmed by steam or the like, which is a heating medium, flowing inside the heating tube 11.
  • gas blowing means for blowing air, inert gas, or the like as the carrier gas A from the supply port 41, which is also a gas blowing port, into the rotary cylinder 10 is provided.
  • the carrier gas A blown by this gas blowing means flows through the inside of the rotating cylinder 10 toward the other end side of the rotating cylinder 10.
  • a plurality of discharge ports 50 are formed through the peripheral wall on the other end side of the rotating cylinder 10.
  • a plurality of discharge ports 50 are formed along the circumferential direction of the rotating cylinder 10, and in the example of FIGS. 2 and 4, they are formed so as to be separated from each other so as to form two rows.
  • the several discharge port 50 is all made the same shape, it can also be made into a different shape.
  • a steam supply pipe 70 and a drain pipe 71 for supplying steam into the heating pipe 11 are provided on the other end side of the rotary cylinder 10.
  • stirring means (detailed structure is not shown) 65 for stirring the workpiece W may be provided inside the other end of the rotating cylinder 10.
  • the rotary cylinder 10 is provided with a classification hood 55 that can discharge the workpiece W and the carrier gas A so as to cover the other end side having the plurality of discharge ports 50. May be.
  • the classification hood 55 is formed from a thick metal, and a fixed discharge port 57 that discharges the dried and classified workpiece W, that is, the processed article E, is exhausted on the bottom surface, and the carrier gas A is exhausted on the top surface.
  • Each has a fixed exhaust port 56.
  • the workpiece W is supplied into the screw feeder 42 from the supply port 41, and is supplied into the rotary cylinder 10 by rotating a screw installed in the screw feeder 42 by a driving means (not shown).
  • the workpiece W supplied from the supply port 41 moves to the other end side of the rotary cylinder 10 while being in contact with the heating tubes 11, 11. As discharged.
  • the carrier gas A blown from the supply port 41 by the blowing means provided on one end side of the rotating cylinder 10 passes through the rotating cylinder 10 and is a discharge port 50 that is also a discharge port for the workpiece W.
  • a discharge port 50 that is also a discharge port for the workpiece W.
  • the steam supplied from the steam supply pipe 70 into the heating pipe 11 is cooled in the process of flowing through the heating pipe 11 and becomes drain D by the workpiece W and the heating pipe 11 contacting and exchanging heat. , And is discharged from the drain pipe 71.
  • the carrier gas A blown from the supply port 41 by the blowing means provided on one end side of the rotating cylinder 10 passes through the rotating cylinder 10 and is a discharge port 50 that is also a discharge port for the workpiece W.
  • the carrier gas A is exhausted from the discharge port 50 together with the fine particles C dispersed in the rotary cylinder 10 by the scraping plate 60.
  • the carrier gas A exhausted from the exhaust port 50 is exhausted from the classification hood 55 through the fixed exhaust port 56.
  • particles having a large particle size and a heavy weight fall in the rotary cylinder 10 and naturally fall from the discharge port 50 located on the lower side without accompanying the carrier gas A.
  • the particles that have fallen naturally are discharged to the outside as a processed object E from the fixed discharge port 57.
  • a chute method (FIG. 7), a vibration trough method (FIG. 8), and the like can be used as a method for supplying a workpiece to the horizontal rotary dryer.
  • the supply chute 46 is coupled to the intake box 45, and the workpiece W supplied from the supply port 41 falls in the supply chute 46 and moves into the rotary cylinder 10.
  • An intake box 45 is connected to the rotary cylinder 10 via a seal packing 47, and the rotary cylinder 10 rotates while maintaining a seal between the rotary cylinder 10 and the intake box 45.
  • the intake box 45 is a trough (the cross-sectional shape is concave), and a vibration motor 48 and a spring 49 are coupled to the lower end of the intake box 45.
  • the workpiece W supplied from the supply port 41 falls on the trough.
  • the workpiece W is moved into the rotary cylinder 10 by the vibration of the intake box 45 by the vibration motor 48.
  • the intake box 45 it is preferable to have an inclination downward toward the rotating cylinder so that the workpiece W can easily move.
  • the cross-sectional shape of the rotating cylinder 10 may be a rectangle as well as a circle described later. As an example of a rectangle, a hexagonal rotating cylinder 10 is shown in FIG.
  • the rectangular rotating cylinder 10 is rotated, the workpiece W is lifted by the corner portion 15 of the rotating cylinder 10, so that there is an advantage that the mixing property of the workpiece W is improved.
  • the number of heating tubes to be arranged is reduced because the cross-sectional area of the rotary cylinder 10 is narrower than that of a circular case.
  • the number of corners (the number of sides) of the rectangle can be changed. More specifically, the number of corners can be any number of three or more.
  • a jacket 12 surrounding the rotating cylinder 10 may be provided.
  • the heating medium S is allowed to flow between the outer wall surface of the rotating cylinder 10 and the inner wall of the jacket 12, and heating is also performed from the outside of the rotating cylinder 10.
  • the drying speed of the workpiece W can be increased as compared with the case where the jacket 12 is not provided.
  • the heating medium S include high temperature gas of 200 to 400 ° C., hot oil of 200 to 400 ° C., and the like.
  • a plurality of trace pipes may be provided so as to surround the rotating cylinder 10 instead of the jacket 12.
  • the carrier gas A is sent into the partition wall 23 from the carrier gas supply port 33 at the top of the casing 80.
  • the carrier gas A is a reuse gas
  • dust or the like is contained in the carrier gas A.
  • the ribbon screw Z is disposed inside the partition wall 23, that is, the gas passage U2
  • the gas Dust or the like mixed in is captured by the ribbon screw Z.
  • the captured dust or the like is sent toward the openings 21 and 22 by the feeding action of the ribbon screw Z, and is discharged into the casing 80.
  • the discharged dust or the like is discharged from the discharge port 32 below the discharge casing by free fall.
  • the gas other than the dust of the carrier gas A is sent into the rotary cylinder 10 without being obstructed by the ribbon screw Z.
  • the screw blades 24 also rotate. Therefore, the dried processed product E from which the workpiece W has been dried is sent through the feed passage U1 toward the openings 21 and 22 by the feeding action of the screw blades 24 and is discharged from the openings 21 and 22.
  • the discharged dry matter E is discharged from the discharge port 32 below the discharge casing by its own weight.
  • a steam path (an internal steam supply pipe 61 and an internal drain discharge pipe 62) that penetrates the casing 80 and extends into the partition wall 23 is provided integrally with the rotary cylinder 10.
  • the internal steam supply pipe 61 communicates with the inlet header part of the heating pipe 11 in the end plate part 17, and the internal drain discharge pipe 62 communicates with the outlet header part of the heating pipe 11 in the end plate part 17.
  • the steam supply pipe 70 and the drain discharge pipe 71 are connected to the internal steam supply pipe 61 and the internal drain discharge pipe 62 via the rotary joint 63, respectively.
  • the horizontal rotary dryer employs “cocurrent flow” in which the direction in which the workpiece W moves and the direction in which the carrier gas A flows are the same.
  • a “countercurrent” in which the direction in which the workpiece W moves and the direction in which the carrier gas A flows may be reversed may be employed.
  • Fig. 12 shows an example of a horizontal rotary dryer using "countercurrent".
  • a supply port 31 for the workpiece W is provided above the screw feeder 42, and a discharge port 32 for the workpiece E is provided at the lower end of the hood 35. Then, the workpiece W is supplied from the supply port 31, the workpiece W is moved from one end side to the other end side of the rotating cylinder 10, and is heated and dried by the heating tube 11 in the moving process, and then dried.
  • the processed product E is discharged from the discharge port 32.
  • a carrier gas A supply port 33 is provided at the upper end of the hood 35, and a carrier gas A discharge port 34 is provided above the screw feeder 42.
  • the carrier gas A is supplied from the supply port 33, the carrier gas A is flowed from the other end side to the one end side of the rotating cylinder 10, and the vapor evaporated from the workpiece W in the process is conveyed, The accompanying carrier gas A is discharged from the discharge port 34.
  • a gas blowing tube type horizontal rotary dryer having a gas blowing tube 36 in the rotary cylinder 10 may be used.
  • the gas blowing pipe 36 is provided extending in the axial direction inside the rotary cylinder 10 and rotates together with the rotary cylinder 10 and the heating pipe 11.
  • it can be provided between the plurality of heating tubes 11, 11 or further inside the heating tube 11 located on the innermost side.
  • the display of the heating pipe 11 is omitted for easy understanding of the gas blowing pipe 36.
  • a plurality of gas blowing ports 37 are open on the wall surface of the gas blowing pipe 36. In the example of FIG. 13, two rows of gas blowing ports 37 are provided in the axial direction above the gas blowing tube 36.
  • the carrier gas A When operating the gas blowing tube dryer, the carrier gas A is supplied into the gas blowing tube 36 from the other end of the rotary cylinder 10.
  • the supplied carrier gas A is ejected from the gas blowing port 37 into the rotating cylinder, and flows out from one end side of the rotating cylinder with the vapor of the workpiece W.
  • the carrier gas A may be supplied into the gas blowing pipe 36 from one end side of the rotating cylinder 10 and exhausted from the other end side of the rotating cylinder.
  • the support structure of the rotary cylinder 10 includes a screw casing 42 provided on one end side and a gas pipe 72 provided on the other end side in addition to the support structure in which the two tire members 20, 20 are attached to the outer periphery of the rotary cylinder 10.
  • a bearing (not shown) may be attached to the outer periphery of the tire to support the bearing, or a support structure in which the tire member 20 and the bearing are combined.
  • the size and arrangement of the heating tube 11 can be selected as appropriate.
  • the following is described. The knowledge that the means to do was effective was acquired.
  • the heating tubes 11 are arranged radially in the rotating cylinder 10.
  • the workpiece W (powder particles) enters the gaps of the plurality of heating tubes 11 that have moved to the lower portion of the rotating cylinder 10, and the rotation direction is rotated by the plurality of heating tubes 11 as the rotating cylinder 10 rotates. Scratched up.
  • the workpiece W that has been scraped up to the angle of repose begins to collapse mainly when it exceeds the angle of repose and starts to fall. More specifically, it falls like an avalanche between a plurality of heating tubes 11 positioned above the repose angle limit, and collides with the heating tube 11 positioned below the rotating cylinder 10.
  • the dropped workpiece W reenters the gaps between the plurality of heating tubes 11 and 11 below the rotating cylinder 10. Since the angle at which the workpiece W falls and the angle into the gap between the heating tubes 11 and 11 are different, the workpiece W does not quickly enter the gap between the heating tubes 11 and 11 and the outside of the heating tubes 11 and 11 (rotation) It was found that the contact efficiency between the workpiece W and the heating tube 11 was poor. When the contact efficiency is poor, there is a problem that the drying speed of the object to be processed is reduced.
  • the present invention has improved the arrangement of the heating tubes in order to solve the above problems. That is, the supply port for the object to be processed is provided on one end side, and the discharge port for the object to be processed is provided on the other end side.
  • the groups of the heating tubes 11, 11... Are arranged substantially concentrically around the center of the rotating cylinder 10, and the first reference heating tube S1 core on the center side circle is connected to the second reference heating tube S2.
  • the connecting line connecting up to the core is selected from one of the following arrangement forms (1) or (2) or an arrangement form combining these.
  • Each heating pipe 11, 11 ... core is located on the straight line L1 which directly connects the first reference heating pipe S1 core and the second reference heating pipe S2 core, and further the first reference heating pipe S1 core.
  • Each heating pipe 11, 11 ... core is located on the curve L2 which connects the 1st standard heating pipe S1 core and the 2nd standard heating pipe S2 core, and is on the 2nd standard heating pipe S2 core.
  • the second reference heating tube S2 core is located rearward in the rotation direction of the rotating cylinder 10 with respect to the radial radiation J1 passing through the first reference heating tube S1 core.
  • positioning form which is located.
  • the heating tubes 11, 11,... are arranged concentrically around the center F of the rotating cylinder 10, and the concentric circle r1 of the first reference heating tube S1 on the center side circle.
  • the concentric circle r2 of the second reference heating tube S2 and the concentric circle r3 of the outermost heating tube 11 located on the outermost side of the rotary cylinder 10 are arranged on the respective concentric circles.
  • the first reference heating tube S1 core (see FIG. 15 and FIG. 16) is arbitrarily selected from a row of heating tube 11 groups (“row 1”: see FIG. 17) located on the most central side of the rotary cylinder 10. This is the core of the heating tube 11 (the center of the heating tube).
  • the second reference heating tube S2 core is identical to the heating tube 11 (first reference heating tube S1) located on the most central side of the rotary cylinder 10 in the “row” of the plurality of heating tubes (see FIG. 17). Counting outward along the “row”, the core of the heating tube S2 having the desired number of columns (the center of the heating tube) is designated.
  • the position of the second reference heating tube S2 core is the flow behavior of the workpiece (this flow behavior is caused by the physical properties (shape, size, viscosity, material type, etc.) of the workpiece, and the operation of the dryer. Depending on factors derived from conditions, etc.).
  • the arrangement ratio ⁇ h2 (the concentric circle r2 of the second reference heating tube S2—the concentric circle r1 of the first reference (innermost) heating tube S1) / h1 (the inner surface of the rotating cylinder—the first reference (innermost) heating tube S1. Is preferably more than 1 ⁇ 2.
  • the present invention it is desirable that at least the section from the first reference heating pipe S1 to the second reference heating pipe S2 is the heating pipe arrangement of the first arrangement form or the second arrangement form described above. Furthermore, the present invention includes the case where the position of the second reference heating tube S2 core is on the concentric circle r3 of the outermost heating tube 11.
  • the region adopting the first arrangement form or the second arrangement form can be appropriately selected.
  • the number of the heating tubes 11 is 7 in total, and the core of the second reference heating tube S2 is used.
  • An example is shown in the fourth column.
  • FIGS. 16 and 17 are the second arrangement form.
  • all seven rows are in the first arrangement form. That is, it is located on a straight line L1 that directly connects the first reference heating tube S1 core and the second reference heating tube S2 core, and further, for the radial radiation J1 passing through the first reference heating tube S1 core, the second The reference heating tube S2 core is located behind the rotating cylinder 10 in the rotation direction.
  • the line passing through the first reference heating tube S1 core with the center point F of the rotating cylinder 10 as the starting point is set as the radial radiation J1
  • the line passing through the second reference heating tube S2 core is set as the radial radiation J2.
  • the distances h1 and h2 may be obtained from the distance on the radial radiation J2.
  • the gap between the adjacent heating tubes 11 can be increased as it is positioned outward from the center side.
  • FIGS. 15 to 17 are examples in which the gap between adjacent heating tubes 11 is gradually increased from the center side toward the outside.
  • FIG. 18 shows an example in which the inside of the heating tubes 11, 11... Is arranged in a curved shape according to the second arrangement form, and the outer part is arranged along the radial direction (radial direction).
  • FIG. 19 shows an example in which the inside of the heating tubes 11, 11... Is arranged in a curved shape according to the second arrangement form, and the outer part is arranged along the radial direction (radial direction).
  • the heating tubes 11, 11... are arranged in an oblique straight line according to the first arrangement form, and the outer portion is arranged from the middle concentric circle to the outermost concentric circle through a row of oblique straight heating tubes.
  • An example is shown.
  • the arrangement ratio ⁇ h2 (the concentric circle r2 of the second reference heating tube S2). It is desirable that the concentric circle r1) of the first reference (innermost) heating tube S1) / h1 (the inner surface of the rotating cylinder—the concentric circle r1 of the first reference (innermost) heating tube S1) is greater than 1/2.
  • the heating tube 11 is arranged in a curved line or an oblique straight line, so that the direction in which the workpiece W falls and the direction in which the workpiece W enters between the plurality of heating tubes 11 are approximated and dropped.
  • the workpiece W enters the gaps between the plurality of heating tubes 11 and 11 without greatly changing the direction of movement.
  • the workpiece W that has entered the gap between the heating tubes 11 and 11 flows from the inside to the outside of the rotating cylinder 10 and reaches the cylinder wall of the rotating cylinder 10.
  • the workpiece W quickly enters the gap between the heating tubes 11 and does not stay outside the heating tube 11 (center side of the rotating cylinder 10), and is heated with the workpiece W. Since the contact of the tube 11 is improved, the drying efficiency can be improved. Moreover, since the contact area of the to-be-processed object W and the heating pipe
  • the heating tube 11 since the workpiece W smoothly enters the gap between the heating tubes 11 and 11, the impact received by the heating tube 11 from the workpiece W is reduced. Therefore, compared with the case where the heating tube 11 is arrange
  • the object to be processed W (powder particles) was crushed by the collision of the object to be processed W and the heating tube 11, but according to the above-mentioned preferred embodiment, Crushing can be prevented or suppressed. As a result, the particle size distribution of the final product (dried product) can be stabilized, and the fine powder can be reduced to reduce the load on the exhaust treatment facility.
  • each heating tube 11, 11 ... can be selected suitably.
  • the number of the heating tubes 11 on the concentric circles may be the same, but when the heating tubes 11 are provided in a straight line, the heating from the outermost periphery to the middle of the rotating cylinder 10 is performed as shown in FIG. It is better to increase the number of the tubes 11 than the number of the heating tubes 11 from the middle of the rotating cylinder 10 to the innermost periphery.
  • the distance between the adjacent heating tubes 11, 11 can be made substantially the same from the innermost periphery to the outermost periphery.
  • the heat transfer area of the heating tube 11 increases, and the drying efficiency of the workpiece W moved to the outer peripheral side of the rotating cylinder 10 can be improved.
  • Diameter of heating tube 11 Although all the diameters of the heating tubes 11 may be the same, as shown in FIG. 17, the diameter can be gradually increased from the inner peripheral side to the outer peripheral side of the rotating cylinder 10. Thus, by changing the diameter of the heating tube 11, the distance between the adjacent heating tubes 11 can be made substantially the same from the inner periphery to the outer periphery. By increasing the diameter of the heating tube 11 in this way, the heat transfer area of the heating tube 11 is increased, and the drying efficiency of the workpiece W moved to the outer peripheral side of the rotating cylinder 10 can be improved.
  • the arrangement of the heating tubes 11 is represented by a “matrix”, the arrangement in the radial direction of the rotating cylinder 10 (the direction from the center side of the rotating cylinder 10 toward the outside) is “column”, and the arrangement in the circumferential direction is “row”.
  • Dispersibility of the workpiece W by changing the distance between adjacent rows (for example, the distance between rows 1 and 2) and the distance between adjacent columns (for example, the distance between columns 1 and 2). And change the fluidity.
  • the distance between the rows is the distance between the heating tube 11 and the reference heating tube 11 in (1)
  • the distance between the heating tube 11 and the reference heating tube 11 in (2) the distance between the heating tube 11 and the reference heating tube 11 in (8)
  • the distance between the heating tube 11 and the reference heating tube 11 and the distance between the heating tube 11 and the reference heating tube 11 in (6) are considered, and these are set to be equal to or greater than the predetermined value.
  • the distance between the heating tube 11 and the reference heating tube 11 in (3) and the distance between the heating tube 11 and the reference heating tube 11 in (7) can be considered, and these are also equal to or greater than the predetermined value. To do.
  • the distance between adjacent heating tubes 11 is preferably 80 to 150 mm.
  • the distance between the rows and the distance between the columns are the constraint conditions when determining the arrangement of the heating tubes 11. While following this restraint condition, in order to increase the heat transfer area as much as possible and improve the fluidity, various variations were tried by changing the diameter, the number of rows and the number of columns of the heating tube 11, and the heat transfer area was the widest.
  • the product is designed by adopting an arrangement that improves fluidity.
  • the curvature of the row when the curvature of the row is gradually increased, the diameter of the heating tube 11 is gradually decreased and the number of columns is gradually increased, so that the heat transfer area is maximized. I was able to.
  • the heat transfer area could be maximized by gradually increasing the diameter of the heating tube 11 and gradually decreasing the number of columns.

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

[Problem] To provide a horizontal rotary dryer which exhibits improved drying performance and makes it easy to process large quantities of a processing-target material. [Solution] A horizontal rotary dryer, the positional configuration of which is selected from positional configuration (1), positional configuration (2), or a combination thereof, wherein heating tubes are positioned in the selected positional configuration. (1) Each heating tube core is positioned on a straight line (L1) directly connecting the first reference heating tube core and the second reference heating tube core, wherein the second reference heating tube core is positioned to the rear in the direction of rotation of a rotating tube, relative to a radial line passing through the first reference heating tube core. (2) Each heating tube core is positioned on a curved line (L2) connecting the first reference heating tube core and the second reference heating tube core, and the position of the heating tube cores is increasingly farther to the rear in the direction of rotation of the rotating tube toward the second reference heating tube core, wherein the second reference heating tube core is positioned to the rear in the direction of rotation of the rotating tube relative to the radial line passing through the first reference heating tube core.

Description

横型回転式乾燥機Horizontal rotary dryer
　本発明は、乾燥速度を向上させる横型回転式乾燥機に関する。 The present invention relates to a horizontal rotary dryer that improves the drying speed.
　石炭や鉱石等の被処理物を乾燥する乾燥機としては、スチームチューブドライヤー（以下「ＳＴＤ」という。）、コールインチューブ（特許文献１）、ロータリーキルン等が多用されている。前記石炭や鉱石は、製鉄や精錬の原料、発電燃料等として用いられ、これらを安定的にかつ大量に処理することが要求されるため、この要求に適う乾燥機として、前記の各乾燥機が採用されている。 Steam dryers (hereinafter referred to as “STD”), call-in tubes (Patent Document 1), rotary kilns, and the like are frequently used as dryers for drying workpieces such as coal and ore. The coal and ore are used as raw materials for steelmaking and refining, power generation fuel, etc., and since it is required to process them stably and in large quantities, each of the above-mentioned dryers is a dryer that meets this requirement. It has been adopted.
　ＳＴＤは被処理物を間接加熱するため、熱効率が高く、単位容量当たりの処理量も多い。また、大型化も可能であるため、大量処理の要求に適している。 Since STD indirectly heats the object to be treated, it has high thermal efficiency and a large amount of treatment per unit volume. Moreover, since the size can be increased, it is suitable for the demand for mass processing.
　コールインチューブも被処理物を間接加熱するため、前記ＳＴＤと同様に、熱効率が高く、単位容量当たりの処理量も多い。しかし、ＳＴＤに比べて大型化が難しいという欠点がある。例えば、前記ＳＴＤ１台で処理できる量をコールインチューブで処理しようとしたとき、複数台必要となる場合がある。 The call-in tube also indirectly heats the object to be processed, so that the heat efficiency is high and the processing amount per unit volume is large as in the case of the STD. However, there is a drawback that it is difficult to increase the size as compared with STD. For example, when an amount that can be processed by one STD is to be processed by a call-in tube, a plurality of units may be required.
　ロータリーキルンは、被処理物に熱風を当てて直接乾燥させるため、間接加熱に比べて熱効率が悪いという欠点がある。また、排気処理設備が非常に大きくなるという欠点もある。かかる理由から、大量の被処理物を処理する乾燥機としては、ＳＴＤに優位性がある。 Rotary kilns have the disadvantage of poor thermal efficiency compared to indirect heating because they are dried directly by applying hot air to the workpiece. In addition, there is a drawback that the exhaust treatment facility becomes very large. For this reason, STD has an advantage as a dryer for processing a large amount of objects to be processed.
実用新案登録第２５１５０７０号公報Utility Model Registration No. 2515070 特公昭６２－６０６３２号公報Japanese Examined Patent Publication No. 62-60632
　近年は、被処理物の大量乾燥処理の要求が強く、その要求に応えるため、乾燥機の大型化が進んでいる。ＳＴＤの大型化を例に挙げると、シェル径が４ｍで、本体長が３０ｍ以上のものも作られている。 In recent years, there has been a strong demand for mass drying of workpieces, and the size of dryers has been increasing in order to meet the demand. Taking STD as an example, a shell with a shell diameter of 4 m and a body length of 30 m or more is also made.
　しかし、乾燥機の大型化は、設置面積が増えてしまうという問題が生じるほか、製造や輸送に問題が生じる。具体的には、強度を保持するために各部材の板厚が増加し、シェル径が４ｍ、本体長が３０ｍの前記ＳＴＤでは、本体重量が４００ｔｏｎにも達する。そのため、完成までに多くの時間かかるという問題がある。また、製造に特別な設備を要するという問題もある。 However, an increase in the size of the dryer causes a problem that the installation area increases, and also causes problems in manufacturing and transportation. Specifically, in order to maintain the strength, the plate thickness of each member increases, and in the STD having a shell diameter of 4 m and a main body length of 30 m, the main body weight reaches 400 tons. Therefore, there is a problem that it takes a lot of time to complete. There is also a problem that special equipment is required for production.
　さらに、大型化に伴って製品輸送の際に、その重量に耐えられる特殊車両が必要になり、輸送路が狭い場合には、分割して輸送し、現場で接合し、組立てる必要があり、工事が非常に繁雑であるという問題もある。 In addition, special products that can withstand the weight of products are required as products become larger, and when the transportation route is narrow, it is necessary to divide and transport, join and assemble on site. There is also a problem that is very complicated.
　そこで、このように装置の大型化には限界があることを踏まえ、むしろ、被処理物の乾燥速度を向上させることを指向するべきであるとの課題を見出した。 Therefore, based on the fact that there is a limit to increasing the size of the apparatus in this way, the present inventors have found a problem that it should rather be directed to improve the drying speed of the workpiece.
　したがって、本発明の課題は、乾燥機による被処理物の乾燥速度を向上させることにある。 Therefore, an object of the present invention is to improve the drying speed of the object to be processed by the dryer.
　上記課題を解決した本発明は次記のとおりである。
　＜請求項１記載の発明＞
　一端側に被処理物の供給口を、他端側に被処理物の排出口を有し、軸心周りに回転自在な回転筒と、加熱媒体が通る多数の加熱管を前記回転筒内に設け、前記回転筒の回転に伴って加熱管群により被処理物を回転方向に掻き上げる構成であり、
　被処理物を前記回転筒の一端側に供給して他端側から排出する過程で、前記加熱管群により被処理物を加熱して乾燥させる横型回転式乾燥機において、
　前記加熱管が、前記回転筒の軸心を中心として実質的に同心円を成すように周方向及び径方向に複数配列され、それぞれの加熱管の間には隙間が設けられ、
　その中心側円上の第１基準加熱管芯から、第２基準加熱管芯までを繋ぐ繋ぎ線が、次記（１）または（２）の配置形態の一つ又はこれらを組み合わせた配置形態から選択され、その選択された配置形態で前記加熱管が配置されている：
　（１）各加熱管芯が、前記第１基準加熱管芯と第２基準加熱管芯とを直接繋ぐ直線Ｌ１上に位置しており、さらに、前記第１基準加熱管芯を通る半径放射線に対して、前記第２基準加熱管芯が、回転筒の回転方向後方に位置している第１配置形態、
　（２）各加熱管芯が、前記第１基準加熱管芯と前記第２基準加熱管芯とを繋ぐ曲線Ｌ２上に位置しており、かつ、前記第２基準加熱管芯に向かうほど回転筒の回転方向後方に位置しており、さらに、前記第１基準加熱管芯を通る半径放射線に対して、前記第２基準加熱管芯が、回転筒の回転方向後方に位置している第２配置形態；
　ことを特徴とする横型回転式乾燥機。 The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A supply port for the object to be processed is provided on one end side, and a discharge port for the object to be processed is provided on the other end side. A rotating cylinder rotatable around the axis and a number of heating tubes through which a heating medium passes are provided in the rotating cylinder. Provided, and is configured to scoop up the object to be processed by the heating tube group along with the rotation of the rotating cylinder,
In the process of supplying the workpiece to one end of the rotating cylinder and discharging it from the other end, in the horizontal rotary dryer that heats and drys the workpiece by the heating tube group,
A plurality of the heating tubes are arranged in the circumferential direction and the radial direction so as to form a substantially concentric circle around the axis of the rotating cylinder, and a gap is provided between each heating tube,
The connecting line that connects the first reference heating tube core to the second reference heating tube core on the center side circle is one of the following arrangement forms (1) or (2) or an arrangement form combining these. The heating tube is arranged in the selected arrangement form selected:
(1) Each heating tube core is located on a straight line L1 directly connecting the first reference heating tube core and the second reference heating tube core, and further, the radiation radiation passes through the first reference heating tube core. On the other hand, the first reference form in which the second reference heating tube core is located behind the rotating cylinder in the rotation direction,
(2) Each heating tube core is positioned on a curve L2 that connects the first reference heating tube core and the second reference heating tube core, and the rotating cylinder becomes closer to the second reference heating tube core. A second arrangement in which the second reference heating tube core is positioned rearward in the rotation direction of the rotating cylinder with respect to radial radiation passing through the first reference heating tube core. Form;
A horizontal rotary dryer characterized by that.
　（作用効果）
　本発明に従って、加熱管１１を斜め直線状の第１配置形態又は曲線状の第２配置形態とすることで、被処理物Ｗが落下する方向と被処理物Ｗが複数の加熱管１１の間に入り込む方向が近似し、落下した被処理物Ｗはその運動方向を大きく変えずに複数の加熱管１１,１１の隙間に入り込む。加熱管１１,１１の隙間に入り込んだ被処理物Ｗは、回転筒１０の内側から外側へと流れ、回転筒１０の筒壁に到達する。加熱管１１の配置を選定することで、加熱管１１の隙間に被処理物Ｗが速やかに入り込み、加熱管１１の外側（回転筒１０の中心側）に滞留せず、被処理物Ｗと加熱管１１の接触が良くなるため、乾燥効率を向上させることができる。また、被処理物Ｗと加熱管１１の接触面積が増大し、両者の接触時間も増えるため、この点からも乾燥効率を向上させることができる。 (Function and effect)
According to the present invention, the heating tube 11 is in the first arrangement form having a slanting linear shape or the second arrangement form having a curved shape, so that the direction in which the workpiece W falls and the workpiece W are between the heating tubes 11 The entering direction approximates, and the workpiece W that has fallen enters the gaps between the plurality of heating tubes 11 and 11 without greatly changing the moving direction. The workpiece W that has entered the gap between the heating tubes 11 and 11 flows from the inside to the outside of the rotating cylinder 10 and reaches the cylinder wall of the rotating cylinder 10. By selecting the arrangement of the heating tube 11, the workpiece W quickly enters the gap between the heating tubes 11 and does not stay outside the heating tube 11 (center side of the rotating cylinder 10), and is heated with the workpiece W. Since the contact of the tube 11 is improved, the drying efficiency can be improved. Moreover, since the contact area of the to-be-processed object W and the heating pipe | tube 11 increases and both contact time also increases, drying efficiency can be improved also from this point.
　さらに、被処理物Ｗが加熱管１１,１１の隙間に滑らかに入り込むため、被処理物Ｗが落下した際に、被処理物Ｗから加熱管１１が受ける衝撃が小さくなる。従来は落下の衝撃に耐えるために加熱管１１の直径を大きくせざるを得なかったが、本発明によって加熱管１１の直径を小さくすることができ、加熱管１１の本数を増やすことができる。その結果、全体として加熱管１１の伝熱面積が増え、乾燥効率を向上させることができる。 Furthermore, since the workpiece W smoothly enters the gap between the heating tubes 11, 11, when the workpiece W falls, the impact received by the heating tube 11 from the workpiece W is reduced. Conventionally, the diameter of the heating tube 11 must be increased in order to withstand the impact of dropping, but the diameter of the heating tube 11 can be reduced by the present invention, and the number of the heating tubes 11 can be increased. As a result, the heat transfer area of the heating tube 11 increases as a whole, and the drying efficiency can be improved.
　＜請求項２記載の発明＞
　配置比ε＝離間距離ｈ２（第２基準加熱管の同心円－第１基準加熱管の同心円）／離間距離ｈ１（回転筒内面－第１基準加熱管の同心円）が、１／２超とする範囲で、前記（１）または（２）の配置形態の一つ又はこれらを組み合わせた配置形態が採られている請求項１記載の横型回転式乾燥機。 <Invention of Claim 2>
Arrangement ratio ε = separation distance h2 (concentric circle of the second reference heating pipe−concentric circle of the first reference heating pipe) / separation distance h1 (inner surface of the rotating cylinder−concentric circle of the first reference heating pipe) exceeds 1/2 2. The horizontal rotary dryer according to claim 1, wherein one of the arrangement forms (1) or (2) or an arrangement form combining these is adopted.
　（作用効果）
　配置比εが１／２超とする範囲では、請求項１の効果が顕著に現われる。 (Function and effect)
In the range where the arrangement ratio ε is more than ½, the effect of the first aspect is remarkable.
　＜請求項３記載の発明＞
　前記第１基準管の同心円から少なくとも４番目の加熱管の同心円の範囲で、前記（１）または（２）の配置形態の一つ又はこれらを組み合わせた配置形態が採られている請求項１記載の横型回転式乾燥機。 <Invention of Claim 3>
2. The arrangement form according to claim 1, wherein one of the arrangement forms of (1) or (2) or a combination thereof is employed in a range from the concentric circle of the first reference pipe to the concentric circle of at least the fourth heating pipe. Horizontal rotary dryer.
　（作用効果）
　第１基準管の同心円から少なくとも４番目の加熱管の同心円の範囲では、請求項１の効果が顕著に現われる。 (Function and effect)
In the range from the concentric circle of the first reference tube to the concentric circle of at least the fourth heating tube, the effect of claim 1 is prominent.
　以上のように、本発明によれば、乾燥機による被処理物の乾燥速度を向上させることができる。
　また、乾燥速度が向上する結果、乾燥機の大きさ（シェル径）当たりの乾燥処理量を増大できる。逆からいえば、処理量当たりの装置の大きさを小さくできる。 As described above, according to the present invention, the drying speed of the object to be processed by the dryer can be improved.
Further, as a result of the improvement of the drying speed, the amount of drying treatment per dryer size (shell diameter) can be increased. In other words, the size of the apparatus per processing amount can be reduced.
被処理物の付着性を説明した表である。It is the table | surface explaining the adhesiveness of the to-be-processed object. 本発明に係る横型回転式乾燥機の側面図である。1 is a side view of a horizontal rotary dryer according to the present invention. スクリューフィーダ及びその周辺を示した側面図である。It is the side view which showed the screw feeder and its periphery. 回転筒の他端側の拡大図（側面図）である。It is an enlarged view (side view) of the other end side of a rotating cylinder. 本発明に係る横型回転式乾燥機（変形例）の側面図である。It is a side view of the horizontal rotary dryer (modification) concerning the present invention. 図５のＸ－Ｘ線断面図である。FIG. 6 is a sectional view taken along line XX in FIG. 5. 供給方式がシュート式である場合の側面図である。It is a side view in case a supply system is a chute type. 供給方式が振動トラフ式である場合の側面図である。It is a side view in case a supply system is a vibration trough type. 回転筒の横断面の形状を矩形にした例である。It is the example which made the shape of the cross section of the rotation cylinder the rectangle. 回転筒の外側にジャケットを設けた場合の側面図である。It is a side view at the time of providing a jacket on the outer side of a rotating cylinder. 処理物の排出方式の変形例を示した側面図である。It is the side view which showed the modification of the discharge method of a processed material. 向流を採用した横型回転式乾燥機の斜視図である。It is a perspective view of the horizontal rotary dryer which employ | adopted countercurrent. ガス吹き込み管式の横型回転式乾燥機の説明図であり、（ａ）はガス吹き込み管の断面図であり、（ｂ）はガス吹き込み管を乾燥機内に配した斜視図である。It is explanatory drawing of a gas blowing tube type horizontal rotary dryer, (a) is sectional drawing of a gas blowing tube, (b) is the perspective view which has distribute | arranged the gas blowing tube in the dryer. 従来の横型回転式乾燥機の加熱管の配置例を示した横断面図である。It is the cross-sectional view which showed the example of arrangement | positioning of the heating tube of the conventional horizontal rotary dryer. 本発明に係る横型回転式乾燥機の加熱管の配置（第１配置形態）例を示した横断面図である。It is the cross-sectional view which showed the example of arrangement | positioning (1st arrangement | positioning form) of the heating pipe | tube of the horizontal rotary dryer which concerns on this invention. 本発明に係る横型回転式乾燥機の加熱管の配置（第２配置形態）例を示した横断面図である。It is the cross-sectional view which showed the example of arrangement | positioning (2nd arrangement | positioning form) of the heating tube of the horizontal rotary dryer which concerns on this invention. 行及び列の説明図である。It is explanatory drawing of a row and a column. 本発明に係る横型回転式乾燥機の加熱管の他の配置例を示した横断面図である。It is the cross-sectional view which showed the other example of arrangement | positioning of the heating tube of the horizontal rotary dryer which concerns on this invention. 本発明に係る横型回転式乾燥機の加熱管の別の配置例を示した横断面図である。It is the cross-sectional view which showed another example of arrangement | positioning of the heating pipe | tube of the horizontal rotary dryer which concerns on this invention. 本発明に係る横型回転式乾燥機の加熱管の異なる配置例を示した横断面図である。It is the cross-sectional view which showed the example of a different arrangement | positioning of the heating pipe of the horizontal rotary dryer which concerns on this invention.
　以下、本発明の好適な実施形態について、図を用いて更に説明する。なお、以下の説明及び図面は、本発明の実施形態の一例を示したものにすぎず、本発明の内容をこの実施形態に限定して解釈すべきでない。 Hereinafter, preferred embodiments of the present invention will be further described with reference to the drawings. Note that the following description and drawings are merely examples of embodiments of the present invention, and the contents of the present invention should not be construed as being limited to these embodiments.
（被処理物Ｗ）
　まず、乾燥対象物としての被処理物Ｗについて限定はなく、その具体例として、石炭、銅鉱石、鉄粉、亜鉛粉等の鉱石、金属系物質、テレフタル酸、ポリエチレン、ポリアセタール、塩化ビニール等の樹脂系物質、メチオニン、グルテンミール、大豆加工粉、コーンファイバー、コーンジャーム等の加工食品系物質、石膏、アルミナ、ソーダ灰等の無機系物質、脱水汚泥等を挙げることができる。 (Workpiece W)
First, there is no limitation on the object to be processed W as a dry object, and specific examples thereof include ores such as coal, copper ore, iron powder, and zinc powder, metallic substances, terephthalic acid, polyethylene, polyacetal, vinyl chloride, and the like. Examples thereof include resin-based substances, processed food-type substances such as methionine, gluten meal, processed soybean powder, corn fiber and corn germ, inorganic substances such as gypsum, alumina and soda ash, and dehydrated sludge.
　被処理物Ｗは、物質表面がべたべたとしておらず、付着性の低いものが好ましい。図１に、日本粉体工業技術協会規格　ＳＡＰ１５－１３、２０１３　解説書１７頁　解説図５より引用した表を図１に示す。本発明では、図１の点線で囲った領域にあるもの、詳しくはドライ（乾燥）、ペンジュラー域（懸垂域）、ファニキュラー域１（索状域１）、ファニキュラー域２（索状域２）、キャピラリー域（毛管域）の物質を被処理物Ｗとして用いることが好ましい。スラリー（泥しょう）は、付着性が極めて高い傾向にあるため、本発明の被処理物Ｗとして用いることは適していない。 The object to be processed W is preferably a material whose surface is not sticky and has low adhesion. FIG. 1 shows a table quoted from FIG. 5 on page 17 of the manual 17 of the Japanese Powder Industrial Technology Association standard SAP15-13, 2013. In the present invention, what is in the area surrounded by the dotted line in FIG. 1, specifically dry (dry), pendular area (suspended area), funicular area 1 (corrugated area 1), funicular area 2 (corrugated area 2) It is preferable to use a substance in the capillary region (capillary region) as the workpiece W. Since the slurry (mud) tends to have very high adhesion, it is not suitable for use as the workpiece W of the present invention.
（間接加熱横型回転式乾燥機）
　次に、本発明に係る横型回転式乾燥機（以下、「ＳＴＤ（Ｓｔｅａｍ　Ｔｕｂｅ　Ｄｒｙｅｒの略称）」ともいう。）について説明する。この横型回転式乾燥機の構造は、図２に例示するように、円筒状の回転筒１０を有し、この回転筒１０の軸心が水平面に対して若干傾くようにして設置されており、回転筒１０の一端が他端よりも高く位置している。回転筒１０の下方には、２台の支持ユニット２０及びモーターユニット３０が回転筒１０を支持するようにして設置されており、回転筒１０は、モーターユニット３０によって、自身の軸心回りに回転自在とされている。この回転筒１０は、一方向に回転するようになっている。その方向は任意に定めることができ、例えば、図６に示すように、一端側（被処理物Ｗの供給口側）から他端側（被処理物Ｗの排出口側）を見て、反時計回り（矢印Ｒ方向）に回転させることができる。 (Indirect heating horizontal rotary dryer)
Next, a horizontal rotary dryer according to the present invention (hereinafter also referred to as “STD (abbreviation of“ Steam Tube Dryer ”)”) will be described. As illustrated in FIG. 2, the structure of this horizontal rotary dryer has a cylindrical rotating cylinder 10, and is installed so that the axis of the rotating cylinder 10 is slightly inclined with respect to the horizontal plane. One end of the rotating cylinder 10 is positioned higher than the other end. Below the rotating cylinder 10, two support units 20 and a motor unit 30 are installed so as to support the rotating cylinder 10, and the rotating cylinder 10 is rotated around its own axis by the motor unit 30. It is supposed to be free. The rotating cylinder 10 is configured to rotate in one direction. The direction can be arbitrarily determined. For example, as shown in FIG. 6, when viewed from one end side (supply port side of the workpiece W) to the other end side (discharge port side of the workpiece W), It can be rotated clockwise (arrow R direction).
　回転筒１０の内部には、金属製のパイプであるスチームチューブ（加熱管）１１が、被乾燥物への伝熱管として、回転筒１０の軸心に沿って延在して多数取り付けられている。この加熱管１１は、例えば回転筒１０の軸心に対して同心円を成すように周方向及び径方向に複数本ずつ配列されている。この配置形態については、後に詳説する。なお、この加熱管１１は、加熱媒体である蒸気等が加熱管１１の内部を流通することで温められる。 A large number of steam tubes (heating tubes) 11, which are metal pipes, extend along the axis of the rotating tube 10 as heat transfer tubes to the object to be dried inside the rotating tube 10. . For example, a plurality of heating tubes 11 are arranged in the circumferential direction and the radial direction so as to form a concentric circle with respect to the axis of the rotating cylinder 10. This arrangement will be described in detail later. The heating tube 11 is warmed by steam or the like, which is a heating medium, flowing inside the heating tube 11.
　スクリューフィーダ４２の近傍には、ガス吹込み口でもある供給口４１からキャリアガスＡとして空気、不活性ガス等を回転筒１０の内部に吹き込むガス吹込み手段（図示しない）が設けられており、このガス吹込み手段によって吹き込まれたキャリアガスＡは、回転筒１０の他端側に向かって回転筒１０の内部を流通する。 In the vicinity of the screw feeder 42, gas blowing means (not shown) for blowing air, inert gas, or the like as the carrier gas A from the supply port 41, which is also a gas blowing port, into the rotary cylinder 10 is provided. The carrier gas A blown by this gas blowing means flows through the inside of the rotating cylinder 10 toward the other end side of the rotating cylinder 10.
　図２、図４に示すように、回転筒１０の他端側における周壁には、複数の排出口５０が貫通して形成されている。排出口５０は、回転筒１０の周方向に沿って複数形成され、図２、図４の例では、２つの列を成すように相互に離間して形成されている。また、複数の排出口５０は、全て同形とされているが、異形とすることもできる。 2 and 4, a plurality of discharge ports 50 are formed through the peripheral wall on the other end side of the rotating cylinder 10. A plurality of discharge ports 50 are formed along the circumferential direction of the rotating cylinder 10, and in the example of FIGS. 2 and 4, they are formed so as to be separated from each other so as to form two rows. Moreover, although the several discharge port 50 is all made the same shape, it can also be made into a different shape.
　また、回転筒１０の他端側には、加熱管１１内に蒸気を供給する蒸気供給管７０とドレン管７１とが設けられている。 Further, a steam supply pipe 70 and a drain pipe 71 for supplying steam into the heating pipe 11 are provided on the other end side of the rotary cylinder 10.
（変形例）
　なお、図５に示すように、前記回転筒１０の他端側内部に、被処理物Ｗを撹拌する撹拌手段（詳細構造は図示していない）６５を設けても良い。 (Modification)
As shown in FIG. 5, stirring means (detailed structure is not shown) 65 for stirring the workpiece W may be provided inside the other end of the rotating cylinder 10.
　また、図５、図６に示すように、回転筒１０には、複数の排出口５０を有する他端側を覆うように、被処理物Ｗ及びキャリアガスＡを排出可能な分級フード５５を設けても良い。この分級フード５５は、肉厚な金属から形成されており、底面に、乾燥及び分級された被処理物Ｗ、つまり処理物Ｅを排出する固定排出口５７を、天面にキャリアガスＡを排気する固定排気口５６を、それぞれ有する。 Further, as shown in FIGS. 5 and 6, the rotary cylinder 10 is provided with a classification hood 55 that can discharge the workpiece W and the carrier gas A so as to cover the other end side having the plurality of discharge ports 50. May be. The classification hood 55 is formed from a thick metal, and a fixed discharge port 57 that discharges the dried and classified workpiece W, that is, the processed article E, is exhausted on the bottom surface, and the carrier gas A is exhausted on the top surface. Each has a fixed exhaust port 56.
（乾燥過程）
　次に、図２～図４を参照しながら、横型回転式乾燥機で被処理物Ｗを乾燥する過程を説明する。 (Drying process)
Next, a process of drying the workpiece W with a horizontal rotary dryer will be described with reference to FIGS.
　被処理物Ｗは、供給口４１からスクリューフィーダ４２内に供給され、このスクリューフィーダ４２内部に設置されたスクリューを図示しない駆動手段によって回動させることによって、回転筒１０の内部に供給される。供給口４１から供給された被処理物Ｗは、蒸気によって加熱された加熱管１１,１１…に接触して乾燥されつつ、回転筒１０の他端側に移動し、排出口５０から処理物Ｅとして排出される。 The workpiece W is supplied into the screw feeder 42 from the supply port 41, and is supplied into the rotary cylinder 10 by rotating a screw installed in the screw feeder 42 by a driving means (not shown). The workpiece W supplied from the supply port 41 moves to the other end side of the rotary cylinder 10 while being in contact with the heating tubes 11, 11. As discharged.
　他方、回転筒１０の一端側に設けられた吹込み手段によって、供給口４１から吹き込まれたキャリアガスＡは、回転筒１０内を通過して、被処理物Ｗの排出口でもある排出口５０から回転筒１０外に排気される。 On the other hand, the carrier gas A blown from the supply port 41 by the blowing means provided on one end side of the rotating cylinder 10 passes through the rotating cylinder 10 and is a discharge port 50 that is also a discharge port for the workpiece W. To the outside of the rotary cylinder 10.
　また、蒸気供給管７０から加熱管１１内に供給した蒸気は、被処理物Ｗと加熱管１１が接触して熱交換することにより、加熱管１１内を流れる過程で冷却されてドレンＤになり、ドレン管７１から排出される。 Further, the steam supplied from the steam supply pipe 70 into the heating pipe 11 is cooled in the process of flowing through the heating pipe 11 and becomes drain D by the workpiece W and the heating pipe 11 contacting and exchanging heat. , And is discharged from the drain pipe 71.
（変形例）
　次に、図５、図６を参照しながら、撹拌手段６５及び分級フード５５を備えた横型回転式乾燥機を用いる場合についての動作についても説明する。この場合において、前記説明と重複する部分は、省略する。 (Modification)
Next, the operation in the case of using a horizontal rotary dryer provided with the stirring means 65 and the classification hood 55 will be described with reference to FIGS. In this case, the part which overlaps with the said description is abbreviate | omitted.
　回転筒１０内に供給された被処理物Ｗは、撹拌手段６５の存在する位置まで到達すると、撹拌手段６５によって撹拌され、続いて、図６に示すように、回転筒１０の回転に伴って回動する掻上板６０によって掻き上げられる。掻き上げられた被処理物Ｗは、掻上板６０が回転筒１０の上側に位置すると、自然に落下し、その際に被処理物Ｗに含まれる微粒子Ｃが回転筒１０内に分散する（いわゆるフライトアクション）。 When the workpiece W supplied into the rotary cylinder 10 reaches a position where the stirring means 65 exists, the workpiece W is stirred by the stirring means 65, and subsequently, as the rotary cylinder 10 rotates, as shown in FIG. It is scraped up by the rotating scraping plate 60. When the scraped plate 60 is positioned on the upper side of the rotary cylinder 10, the workpiece W that has been scraped is naturally dropped, and at that time, the fine particles C contained in the workpiece W are dispersed in the rotary cylinder 10 ( So-called flight action).
　他方、回転筒１０の一端側に設けられた吹込み手段によって、供給口４１から吹き込まれたキャリアガスＡは、回転筒１０内を通過して、被処理物Ｗの排出口でもある排出口５０から回転筒１０外に排気される。この際、キャリアガスＡは、掻上板６０によって回転筒１０内に分散された微粒子Ｃを伴って排出口５０から排気される。排出口５０から排気されたキャリアガスＡは、固定排気口５６を介して分級フード５５から排気される。 On the other hand, the carrier gas A blown from the supply port 41 by the blowing means provided on one end side of the rotating cylinder 10 passes through the rotating cylinder 10 and is a discharge port 50 that is also a discharge port for the workpiece W. To the outside of the rotary cylinder 10. At this time, the carrier gas A is exhausted from the discharge port 50 together with the fine particles C dispersed in the rotary cylinder 10 by the scraping plate 60. The carrier gas A exhausted from the exhaust port 50 is exhausted from the classification hood 55 through the fixed exhaust port 56.
　被処理物Ｗのうち、粒子径が大きく重量が重い粒子は、回転筒１０内において落下し、キャリアガスＡに伴うことなく、下側に位置した排出口５０から自然落下する。この自然落下した粒子（被処理物Ｗ）は、固定排出口５７から処理物Ｅとして外部に排出される。 Among the workpieces W, particles having a large particle size and a heavy weight fall in the rotary cylinder 10 and naturally fall from the discharge port 50 located on the lower side without accompanying the carrier gas A. The particles that have fallen naturally (the object to be processed W) are discharged to the outside as a processed object E from the fixed discharge port 57.
（被処理物の供給方式の変形例）
　本発明に係る横型回転式乾燥機の被処理物の供給手段の変形例を説明する。
　横型回転式乾燥機へ被処理物を供給する方式には、前記スクリュー式（図３）のほか、シュート式（図７）や振動トラフ式（図８）なども使用できる。シュート式では、供給シュート４６が吸気ボックス４５と結合しており、供給口４１から供給した被処理物Ｗが、供給シュート４６内を落下し、回転筒１０内へ移動する。吸気ボックス４５がシールパッキン４７を介して回転筒１０に接続しており、回転筒１０と吸気ボックス４５間のシールを維持しながら、回転筒１０が回転する構造になっている。振動トラフ式では、吸気ボックス４５がトラフ（断面形状が凹状）であり、その吸気ボックス４５の下端に振動モータ４８とばね４９が結合している。供給口４１から供給した被処理物Ｗは、トラフの上に落下する。そして、振動モータ４８により吸気ボックス４５が振動することにより、被処理物Ｗが回転筒１０内へと移動する。吸気ボックス４５を取り付ける際は、被処理物Ｗが移動しやすいように、回転筒へ向かって下る傾斜を持たせると良い。 (Modification of processing object supply system)
The modification of the to-be-processed object supply means of the horizontal rotary dryer according to the present invention will be described.
In addition to the screw method (FIG. 3), a chute method (FIG. 7), a vibration trough method (FIG. 8), and the like can be used as a method for supplying a workpiece to the horizontal rotary dryer. In the chute type, the supply chute 46 is coupled to the intake box 45, and the workpiece W supplied from the supply port 41 falls in the supply chute 46 and moves into the rotary cylinder 10. An intake box 45 is connected to the rotary cylinder 10 via a seal packing 47, and the rotary cylinder 10 rotates while maintaining a seal between the rotary cylinder 10 and the intake box 45. In the vibration trough type, the intake box 45 is a trough (the cross-sectional shape is concave), and a vibration motor 48 and a spring 49 are coupled to the lower end of the intake box 45. The workpiece W supplied from the supply port 41 falls on the trough. The workpiece W is moved into the rotary cylinder 10 by the vibration of the intake box 45 by the vibration motor 48. When the intake box 45 is attached, it is preferable to have an inclination downward toward the rotating cylinder so that the workpiece W can easily move.
（回転筒変形例）
　回転筒１０の断面形状は、後述する円形のほか、矩形にしても良い。矩形の例として、六角形の回転筒１０を図９に示す。矩形の回転筒１０を回転すると、回転筒１０の角部１５により被処理物Ｗが持ち上がるため、被処理物Ｗの混合性が良くなる利点がある。一方で、円形の場合に比べて、回転筒１０の断面積が狭くなるため、配置する加熱管の数が減るというデメリットも存在する。なお、矩形の角部の数（辺の数）は変更でき、より詳しくは、角部の数を３つ以上の任意の数にすることができる。 (Rotating cylinder modification)
The cross-sectional shape of the rotating cylinder 10 may be a rectangle as well as a circle described later. As an example of a rectangle, a hexagonal rotating cylinder 10 is shown in FIG. When the rectangular rotating cylinder 10 is rotated, the workpiece W is lifted by the corner portion 15 of the rotating cylinder 10, so that there is an advantage that the mixing property of the workpiece W is improved. On the other hand, there is a demerit that the number of heating tubes to be arranged is reduced because the cross-sectional area of the rotary cylinder 10 is narrower than that of a circular case. Note that the number of corners (the number of sides) of the rectangle can be changed. More specifically, the number of corners can be any number of three or more.
　図１０に示すように、回転筒１０を囲むジャケット１２を設けても良い。この場合、回転筒１０の外壁面とジャケット１２の内壁の間に加熱媒体Ｓを流し、回転筒１０の外側からも加熱を行う。その結果、ジャケット１２を設けない場合と比べて、被処理物Ｗの乾燥速度を上げることができる。この加熱媒体Ｓの例として、２００～４００℃の高温ガス、２００～４００℃のホットオイル等を挙げることができる。そのほか、前記ジャケット１２の代わりに、回転筒１０を囲むようにトレース配管（図示しない）を複数設けても良い。 As shown in FIG. 10, a jacket 12 surrounding the rotating cylinder 10 may be provided. In this case, the heating medium S is allowed to flow between the outer wall surface of the rotating cylinder 10 and the inner wall of the jacket 12, and heating is also performed from the outside of the rotating cylinder 10. As a result, the drying speed of the workpiece W can be increased as compared with the case where the jacket 12 is not provided. Examples of the heating medium S include high temperature gas of 200 to 400 ° C., hot oil of 200 to 400 ° C., and the like. In addition, a plurality of trace pipes (not shown) may be provided so as to surround the rotating cylinder 10 instead of the jacket 12.
（処理物の排出方式の変形例）
　横型回転式乾燥機から乾燥処理物Ｅを排出する方式としては、図１１のような形態も採用できる。かかる形態において、キャリアガスＡが、ケーシング８０の上部のキャリアガス供給口３３から隔壁２３の内側へ送り込まれる。このキャリアガスＡが再利用ガスである場合は、キャリアガスＡ中に粉塵等が含まれているが、隔壁２３の内側、すなわちガス通路Ｕ２には、リボンスクリューＺが配されているため、ガスに混入している粉塵等は、このリボンスクリューＺによって捕捉される。捕捉された粉塵等は、リボンスクリューＺの送り作用により開口部２１、２２へ向かって送られ、ケーシング８０内へ排出される。排出された粉塵等は、自由落下により排出ケーシング下方の排出口３２から排出される。一方、キャリアガスＡの粉塵等以外の気体は、リボンスクリューＺによって妨げられることなく、回転筒１０内へ送られる。 (Modification of the discharge method of processed materials)
As a system for discharging the dried processed product E from the horizontal rotary dryer, a form as shown in FIG. 11 can also be adopted. In such a form, the carrier gas A is sent into the partition wall 23 from the carrier gas supply port 33 at the top of the casing 80. When the carrier gas A is a reuse gas, dust or the like is contained in the carrier gas A. However, since the ribbon screw Z is disposed inside the partition wall 23, that is, the gas passage U2, the gas Dust or the like mixed in is captured by the ribbon screw Z. The captured dust or the like is sent toward the openings 21 and 22 by the feeding action of the ribbon screw Z, and is discharged into the casing 80. The discharged dust or the like is discharged from the discharge port 32 below the discharge casing by free fall. On the other hand, the gas other than the dust of the carrier gas A is sent into the rotary cylinder 10 without being obstructed by the ribbon screw Z.
　また、回転筒１０の回転に伴って、スクリュー羽根２４も回転する。従って、被処理物Ｗが乾燥した乾燥処理物Ｅは、送り出し通路Ｕ１内を、開口部２１、２２へ向かってスクリュー羽根２４の送り作用により送られ、開口部２１、２２から排出される。排出された乾燥物Ｅは、自重により排出ケーシング下方の排出口３２から排出される。 Also, as the rotary cylinder 10 rotates, the screw blades 24 also rotate. Therefore, the dried processed product E from which the workpiece W has been dried is sent through the feed passage U1 toward the openings 21 and 22 by the feeding action of the screw blades 24 and is discharged from the openings 21 and 22. The discharged dry matter E is discharged from the discharge port 32 below the discharge casing by its own weight.
　他方、ケーシング８０を貫き、隔壁２３内へ延在する蒸気経路（内部蒸気供給管６１及び内部ドレン排出管６２）が、回転筒１０と一体で設けられている。内部蒸気供給管６１は、端板部１７における加熱管１１の入口ヘッダ部に、内部ドレン排出管６２は端板部１７における加熱管１１の出口ヘッダ部に連通している。また、蒸気供給管７０及びドレン排出管７１は、回転継手６３を介して、内部蒸気供給管６１及び内部ドレン排出管６２にそれぞれ連結している。 On the other hand, a steam path (an internal steam supply pipe 61 and an internal drain discharge pipe 62) that penetrates the casing 80 and extends into the partition wall 23 is provided integrally with the rotary cylinder 10. The internal steam supply pipe 61 communicates with the inlet header part of the heating pipe 11 in the end plate part 17, and the internal drain discharge pipe 62 communicates with the outlet header part of the heating pipe 11 in the end plate part 17. Further, the steam supply pipe 70 and the drain discharge pipe 71 are connected to the internal steam supply pipe 61 and the internal drain discharge pipe 62 via the rotary joint 63, respectively.
（ガス流通方式変形例）
　前記横型回転式乾燥機は、被処理物Ｗの移動する方向とキャリアガスＡの流れる方向が同じである「並流」を採用していた。そのほか、被処理物Ｗの移動する方向とキャリアガスＡの流れる方向を逆にした「向流」を採用しても良い。 (Modification of gas distribution system)
The horizontal rotary dryer employs “cocurrent flow” in which the direction in which the workpiece W moves and the direction in which the carrier gas A flows are the same. In addition, a “countercurrent” in which the direction in which the workpiece W moves and the direction in which the carrier gas A flows may be reversed may be employed.
　図１２に「向流」を採用した横型回転式乾燥機の一例を示す。スクリューフィーダ４２の上方に被処理物Ｗの供給口３１を設け、フード３５の下端に処理物Ｅの排出口３２を設ける。そして、供給口３１から被処理物Ｗを供給し、被処理物Ｗを回転筒１０の一端側から他端側へ向かって移動させ、その移動過程で加熱管１１により加熱して乾燥させ、乾燥した処理物Ｅを排出口３２から排出する。一方、フード３５の上端にキャリアガスＡの供給口３３を設け、スクリューフィーダ４２の上方にキャリアガスＡの排出口３４を設ける。そして、供給口３３からキャリアガスＡを供給し、前記キャリアガスＡを回転筒１０の他端側から一端側へ向かって流し、その過程で被処理物Ｗから蒸発した蒸気を搬送させ、蒸気を伴うキャリアガスＡを排出口３４から排出する。 Fig. 12 shows an example of a horizontal rotary dryer using "countercurrent". A supply port 31 for the workpiece W is provided above the screw feeder 42, and a discharge port 32 for the workpiece E is provided at the lower end of the hood 35. Then, the workpiece W is supplied from the supply port 31, the workpiece W is moved from one end side to the other end side of the rotating cylinder 10, and is heated and dried by the heating tube 11 in the moving process, and then dried. The processed product E is discharged from the discharge port 32. On the other hand, a carrier gas A supply port 33 is provided at the upper end of the hood 35, and a carrier gas A discharge port 34 is provided above the screw feeder 42. Then, the carrier gas A is supplied from the supply port 33, the carrier gas A is flowed from the other end side to the one end side of the rotating cylinder 10, and the vapor evaporated from the workpiece W in the process is conveyed, The accompanying carrier gas A is discharged from the discharge port 34.
　そのほか、図１３に示すような、回転筒１０内にガス吹き込み管３６を備えているガス吹き込み管式の横型回転式乾燥機を用いても良い。ガス吹き込み管３６は、回転筒１０の内部に軸方向に延在して設けられ、回転筒１０や加熱管１１と共に回転する。例えば、複数の加熱管１１、１１の間や、最も内側に位置する加熱管１１よりも更に内側に設けることができる。なお、図１３では、ガス吹き込み管３６を分かり易くするために、加熱管１１の表示を省いている。このガス吹き込み管３６の壁面には、複数のガス吹き出し口３７が開いている。図１３の例では、ガス吹き込み管３６の上部に、ガス吹き込み口３７を軸方向に２列設けている。 In addition, as shown in FIG. 13, a gas blowing tube type horizontal rotary dryer having a gas blowing tube 36 in the rotary cylinder 10 may be used. The gas blowing pipe 36 is provided extending in the axial direction inside the rotary cylinder 10 and rotates together with the rotary cylinder 10 and the heating pipe 11. For example, it can be provided between the plurality of heating tubes 11, 11 or further inside the heating tube 11 located on the innermost side. In FIG. 13, the display of the heating pipe 11 is omitted for easy understanding of the gas blowing pipe 36. A plurality of gas blowing ports 37 are open on the wall surface of the gas blowing pipe 36. In the example of FIG. 13, two rows of gas blowing ports 37 are provided in the axial direction above the gas blowing tube 36.
　前記ガス吹き込み管式乾燥機を運転する際は、回転筒１０の他端側からガス吹き込み管３６内へキャリアガスＡを供給する。供給されたキャリアガスＡは、ガス吹き込み口３７から回転筒内へ噴き出し、被処理物Ｗの蒸気を伴って、回転筒の一端側から流れ出る。そのほか、回転筒１０の一端側からガス吹き込み管３６内にキャリアガスＡを供給し、回転筒の他端側から排気する構成にしても良い。 When operating the gas blowing tube dryer, the carrier gas A is supplied into the gas blowing tube 36 from the other end of the rotary cylinder 10. The supplied carrier gas A is ejected from the gas blowing port 37 into the rotating cylinder, and flows out from one end side of the rotating cylinder with the vapor of the workpiece W. In addition, the carrier gas A may be supplied into the gas blowing pipe 36 from one end side of the rotating cylinder 10 and exhausted from the other end side of the rotating cylinder.
（回転筒の支持構造変形例）
　そのほか、回転筒１０の支持構造は、回転筒１０の外周に２つのタイヤ部材２０,２０を取り付ける前記支持構造のほか、一端側に設けたスクリューケーシング４２と、他端側に設けたガス管７２の外周にベアリング（図示しない）を取り付け、このベアリングを支持する構造や、前記タイヤ部材２０とベアリングを組み合わせる支持構造にしても良い。 (Variation of support structure of rotating cylinder)
In addition, the support structure of the rotary cylinder 10 includes a screw casing 42 provided on one end side and a gas pipe 72 provided on the other end side in addition to the support structure in which the two tire members 20, 20 are attached to the outer periphery of the rotary cylinder 10. A bearing (not shown) may be attached to the outer periphery of the tire to support the bearing, or a support structure in which the tire member 20 and the bearing are combined.
　＜本発明の加熱管の配置について＞
　本発明において加熱管１１のサイズ及び配置は適宜選択できるものの、本発明者らが高速回転化を指向する過程の中で、主に接触効率を高め、もって乾燥速度を高めるためには、次述する手段が有効であるとの知見を得た。 <About the arrangement of the heating tube of the present invention>
In the present invention, the size and arrangement of the heating tube 11 can be selected as appropriate. However, in order to increase mainly the contact efficiency and increase the drying speed in the process of the present inventors aiming at high speed rotation, the following is described. The knowledge that the means to do was effective was acquired.
（加熱管の配置）
　従来は、図１４に示すように、回転筒１０内に加熱管１１を放射状に配置していた。回転筒１０内では、被処理物Ｗ（粉粒体）が回転筒１０下部に移行した複数の加熱管１１の隙間に入り込み、回転筒１０の回転に伴って、複数の加熱管１１により回転方向に掻き上げられる。安息角まで掻き上げられた被処理物Ｗは、主に安息角を越えた時点から崩落し始め、落下運動に転じる。より詳しくは、安息角限を超えて、より上方に位置する複数の加熱管１１の間から雪崩のように落下し、回転筒１０下部に位置する加熱管１１に衝突する。 (Arrangement of heating tube)
Conventionally, as shown in FIG. 14, the heating tubes 11 are arranged radially in the rotating cylinder 10. In the rotating cylinder 10, the workpiece W (powder particles) enters the gaps of the plurality of heating tubes 11 that have moved to the lower portion of the rotating cylinder 10, and the rotation direction is rotated by the plurality of heating tubes 11 as the rotating cylinder 10 rotates. Scratched up. The workpiece W that has been scraped up to the angle of repose begins to collapse mainly when it exceeds the angle of repose and starts to fall. More specifically, it falls like an avalanche between a plurality of heating tubes 11 positioned above the repose angle limit, and collides with the heating tube 11 positioned below the rotating cylinder 10.
　落下した被処理物Ｗは、回転筒１０下部の複数の加熱管１１、１１の隙間に再び入り込む。被処理物Ｗが落下する角度と加熱管１１、１１の隙間に入り込む角度が異なるため、加熱管１１、１１の隙間に被処理物Ｗが速やかに入り込まず、加熱管１１、１１の外側（回転筒１０の中心側）に滞留してしまい、被処理物Ｗと加熱管１１の接触効率が悪いことが判明した。接触効率が悪いと、被処理物の乾燥速度が低下するという問題があった。 The dropped workpiece W reenters the gaps between the plurality of heating tubes 11 and 11 below the rotating cylinder 10. Since the angle at which the workpiece W falls and the angle into the gap between the heating tubes 11 and 11 are different, the workpiece W does not quickly enter the gap between the heating tubes 11 and 11 and the outside of the heating tubes 11 and 11 (rotation) It was found that the contact efficiency between the workpiece W and the heating tube 11 was poor. When the contact efficiency is poor, there is a problem that the drying speed of the object to be processed is reduced.
　また、被処理物Ｗが落下する方向と複数の加熱管１１、１１の間に入り込む方向が異なるため、落下した被処理物Ｗは最内列（回転筒１０の最も中心側の列）の加熱管１１、１１に衝突して、運動エネルギーが一旦、ゼロになってしまう（リセットされてしまう）という問題があった。 Moreover, since the direction to which the to-be-processed object W falls differs from the direction in which it enters between the some heating pipes 11 and 11, the to-be-processed object W which fell has heated the innermost row | line | column (row most central side of the rotating cylinder 10). There was a problem that the kinetic energy once became zero (reset) by colliding with the tubes 11 and 11.
　本発明は、前記問題を解決するために加熱管の配置を改良した。
　すなわち、一端側に被処理物の供給口を、他端側に被処理物の排出口を有し、軸心周りに回転自在な回転筒１０と、加熱媒体が通る多数の加熱管１１,１１…を前記回転筒１０内に設け、被処理物を前記回転筒１０の一端側に供給して他端側から排出する過程で、前記加熱管１１,１１…により被処理物を加熱して乾燥させる横型回転式乾燥機において、加熱管１１,１１…の配置は、次の配置形態が望ましいのである。
　前記加熱管１１,１１…群が、前記回転筒１０の中心を中心とする実質的に同心円状に配置され、その中心側円上の第１基準加熱管Ｓ１芯から、第２基準加熱管Ｓ２芯までを繋ぐ繋ぎ線が、次記（１）または（２）の配置形態の一つ又はこれらを組み合わせた配置形態から選択されるものである。 The present invention has improved the arrangement of the heating tubes in order to solve the above problems.
That is, the supply port for the object to be processed is provided on one end side, and the discharge port for the object to be processed is provided on the other end side. Are provided in the rotary cylinder 10, and the processed object is heated by the heating tubes 11, 11... In the horizontal rotary dryer to be used, the arrangement of the heating tubes 11, 11.
The groups of the heating tubes 11, 11... Are arranged substantially concentrically around the center of the rotating cylinder 10, and the first reference heating tube S1 core on the center side circle is connected to the second reference heating tube S2. The connecting line connecting up to the core is selected from one of the following arrangement forms (1) or (2) or an arrangement form combining these.
　＜図１５参照：斜め直線状形態＞
　（１）各加熱管１１,１１…芯が、第１基準加熱管Ｓ１芯と第２基準加熱管Ｓ２芯とを直接繋ぐ直線Ｌ１上に位置しており、さらに、第１基準加熱管Ｓ１芯を通る半径放射線Ｊ１に対して、前記第２基準加熱管Ｓ２芯が、回転筒１０の回転方向後方に位置している第１配置形態。 <See FIG. 15: Diagonal linear form>
(1) Each heating pipe 11, 11 ... core is located on the straight line L1 which directly connects the first reference heating pipe S1 core and the second reference heating pipe S2 core, and further the first reference heating pipe S1 core. The first arrangement form in which the second reference heating tube S2 core is located rearward in the rotation direction of the rotary cylinder 10 with respect to the radial radiation J1 passing through the rotary cylinder 10.
　＜図１６参照：曲線状形態＞
　（２）各加熱管１１,１１…芯が、第１基準加熱管Ｓ１芯と第２基準加熱管Ｓ２芯とを繋ぐ曲線Ｌ２上に位置しており、かつ、第２基準加熱管Ｓ２芯に向かうほど回転筒１０の回転方向後方に位置しており、さらに、第１基準加熱管Ｓ１芯を通る半径放射線Ｊ１に対して、第２基準加熱管Ｓ２芯が、回転筒１０の回転方向後方に位置している第２配置形態。 <See FIG. 16: Curved Form>
(2) Each heating pipe 11, 11 ... core is located on the curve L2 which connects the 1st standard heating pipe S1 core and the 2nd standard heating pipe S2 core, and is on the 2nd standard heating pipe S2 core. The second reference heating tube S2 core is located rearward in the rotation direction of the rotating cylinder 10 with respect to the radial radiation J1 passing through the first reference heating tube S1 core. The 2nd arrangement | positioning form which is located.
　すなわち、図１５及び図１６に示すように、加熱管１１,１１…は、回転筒１０の中心Ｆを中心にして同心円状に配置され、中心側円上の第１基準加熱管Ｓ１の同心円ｒ１、第２基準加熱管Ｓ２の同心円ｒ２、回転筒１０の最も外側に位置する最外加熱管１１の同心円ｒ３を含めた各同心円上に配置されている。 15 and 16, the heating tubes 11, 11,... Are arranged concentrically around the center F of the rotating cylinder 10, and the concentric circle r1 of the first reference heating tube S1 on the center side circle. The concentric circle r2 of the second reference heating tube S2 and the concentric circle r3 of the outermost heating tube 11 located on the outermost side of the rotary cylinder 10 are arranged on the respective concentric circles.
　第１基準加熱管Ｓ１芯（図１５及び図１６参照）は、回転筒１０の最も中心側に位置する加熱管１１群の列（「列１」：図１７参照。）の中から任意に選んだ加熱管１１の芯（加熱管の中心）である。 The first reference heating tube S1 core (see FIG. 15 and FIG. 16) is arbitrarily selected from a row of heating tube 11 groups (“row 1”: see FIG. 17) located on the most central side of the rotary cylinder 10. This is the core of the heating tube 11 (the center of the heating tube).
　また、第２基準加熱管Ｓ２芯は、複数加熱管の「列」において（図１７参照）、回転筒１０の最も中心側に位置する加熱管１１（第１基準加熱管Ｓ１）から、同一の「行」に沿って外側へ向かって数えて、所望の列数の加熱管Ｓ２の芯（加熱管の中心）を指称する。 Further, the second reference heating tube S2 core is identical to the heating tube 11 (first reference heating tube S1) located on the most central side of the rotary cylinder 10 in the “row” of the plurality of heating tubes (see FIG. 17). Counting outward along the “row”, the core of the heating tube S2 having the desired number of columns (the center of the heating tube) is designated.
　第２基準加熱管Ｓ２芯の位置は、被処理物の流動挙動（この流動挙動は、被処理物の物性（形状、大きさ、粘性、材料種など）に由来する要因と、乾燥機の運転条件に由来する要因などに左右される）に応じて適宜選択できる。
　このとき、配置比ε＝ｈ２（第２基準加熱管Ｓ２の同心円ｒ２－第１基準（最内）加熱管Ｓ１の同心円ｒ１）／ｈ１（回転筒内面－第１基準（最内）加熱管Ｓ１の同心円ｒ１）を、１／２超とするのが望ましい。
　また、本発明においては、少なくとも、第１基準加熱管Ｓ１から第２基準加熱管Ｓ２までの区間については、前述の第１配置形態か第２配置形態の加熱管配置とするのが望ましい。
　さらに、本発明においては、第２基準加熱管Ｓ２芯の位置が、最外加熱管１１の同心円ｒ３上にある場合も含むものである。 The position of the second reference heating tube S2 core is the flow behavior of the workpiece (this flow behavior is caused by the physical properties (shape, size, viscosity, material type, etc.) of the workpiece, and the operation of the dryer. Depending on factors derived from conditions, etc.).
At this time, the arrangement ratio ε = h2 (the concentric circle r2 of the second reference heating tube S2—the concentric circle r1 of the first reference (innermost) heating tube S1) / h1 (the inner surface of the rotating cylinder—the first reference (innermost) heating tube S1. Is preferably more than ½.
In the present invention, it is desirable that at least the section from the first reference heating pipe S1 to the second reference heating pipe S2 is the heating pipe arrangement of the first arrangement form or the second arrangement form described above.
Furthermore, the present invention includes the case where the position of the second reference heating tube S2 core is on the concentric circle r3 of the outermost heating tube 11.
　このように、第１配置形態又は第２配置形態を採る領域は、適宜選択でき、図１５に示す例では、加熱管１１の列数が全７列であり、第２基準加熱管Ｓ２の芯が４列目にある例を示した。 As described above, the region adopting the first arrangement form or the second arrangement form can be appropriately selected. In the example shown in FIG. 15, the number of the heating tubes 11 is 7 in total, and the core of the second reference heating tube S2 is used. An example is shown in the fourth column.
　図１５の例は第１の配置形態の例であり、図１６及び図１７の例は第２の配置形態である。 15 is an example of the first arrangement form, and the examples of FIGS. 16 and 17 are the second arrangement form.
　図１５の例は、全７列のすべてが第１の配置形態である。すなわち、第１基準加熱管Ｓ１芯と第２基準加熱管Ｓ２芯とを直接繋ぐ直線Ｌ１上に位置しており、さらに、第１基準加熱管Ｓ１芯を通る半径放射線Ｊ１に対して、第２基準加熱管Ｓ２芯が、回転筒１０の回転方向後方に位置している。 In the example of FIG. 15, all seven rows are in the first arrangement form. That is, it is located on a straight line L1 that directly connects the first reference heating tube S1 core and the second reference heating tube S2 core, and further, for the radial radiation J1 passing through the first reference heating tube S1 core, the second The reference heating tube S2 core is located behind the rotating cylinder 10 in the rotation direction.
　図１６及び図１７の例では、全９列のすべてが第２の配置形態である。すなわち、各加熱管１１，１１…の芯が、第１基準加熱管Ｓ１芯と第２基準加熱管Ｓ２芯とを繋ぐ曲線Ｌ２上に位置しており、かつ、第２基準加熱管Ｓ２芯に向かうほど回転筒の回転方向後方に位置しており、さらに、第１基準加熱管Ｓ１芯を通る半径放射線Ｊ１に対して、第２基準加熱管Ｓ２芯が、回転筒１０の回転方向後方に位置している。 In the examples of FIGS. 16 and 17, all nine rows are in the second arrangement form. That is, the cores of the heating tubes 11, 11... Are positioned on the curve L2 connecting the first reference heating tube S1 core and the second reference heating tube S2 core, and the second reference heating tube S2 core The second reference heating tube S2 core is positioned rearward in the rotation direction of the rotating cylinder 10 with respect to the radial radiation J1 passing through the first reference heating tube S1 core. is doing.
　なお、図１５及び図１６において、回転筒１０の中心点Ｆを始点として、第１基準加熱管Ｓ１芯を通る線を半径放射線Ｊ１として、第２基準加熱管Ｓ２芯を通る線を半径放射線Ｊ２として、それぞれ示した。前記ｈ１及びｈ２の各距離は、半径放射線Ｊ２上の距離から求めると良い。 In FIGS. 15 and 16, the line passing through the first reference heating tube S1 core with the center point F of the rotating cylinder 10 as the starting point is set as the radial radiation J1, and the line passing through the second reference heating tube S2 core is set as the radial radiation J2. As shown respectively. The distances h1 and h2 may be obtained from the distance on the radial radiation J2.
（加熱管の他の曲線状または直線状配置）
　そのほか、本発明の別の好適な形態の下では、回転筒１０の回転軸の同心円上において、中心側から外側に位置するに従って、隣り合う加熱管１１の隙間を大きくした配置とすることもできる。図１５～図１７は、中心側から外側へ向かうに従って、隣り合う加熱管１１の隙間を次第に大きくする配置とした例である。 (Other curvilinear or linear arrangement of heating tube)
In addition, according to another preferred embodiment of the present invention, on the concentric circle of the rotating shaft of the rotary cylinder 10, the gap between the adjacent heating tubes 11 can be increased as it is positioned outward from the center side. . FIGS. 15 to 17 are examples in which the gap between adjacent heating tubes 11 is gradually increased from the center side toward the outside.
　また、第１基準加熱管Ｓ１芯と、第２基準加熱管Ｓ２芯とを繋ぐ曲線Ｌ２としては、サイクロイド（粒子が最速で降下する場合に描く線）、コルニュの螺旋（滑らかに降下する場合に描く線）若しくは対数曲線、円弧線またはそれらの線と近似する線などとすることができる。 In addition, as a curve L2 connecting the first reference heating tube S1 core and the second reference heating tube S2 core, cycloid (a line drawn when particles descend at the fastest speed), Cornu spiral (when falling smoothly) Drawn lines), logarithmic curves, circular arc lines, or lines approximating those lines.
　図１８には、加熱管１１，１１…の内側を第２配置形態に従う曲線状に配置し、外側部分については半径方向（放射方向）に沿う形態の例を示した。 FIG. 18 shows an example in which the inside of the heating tubes 11, 11... Is arranged in a curved shape according to the second arrangement form, and the outer part is arranged along the radial direction (radial direction).
　図１９には、加熱管１１，１１…の内側を第２配置形態に従う曲線状に配置し、外側部分については半径方向（放射方向）に沿う形態の例を示した。 FIG. 19 shows an example in which the inside of the heating tubes 11, 11... Is arranged in a curved shape according to the second arrangement form, and the outer part is arranged along the radial direction (radial direction).
　図２０には、加熱管１１，１１…を第１配置形態に従う斜め直線状に配置し、外側部分については、中間の同心円上から最も外側の同心円にかけて、斜め直線状の加熱管の行を介装した例を示している。 In FIG. 20, the heating tubes 11, 11... Are arranged in an oblique straight line according to the first arrangement form, and the outer portion is arranged from the middle concentric circle to the outermost concentric circle through a row of oblique straight heating tubes. An example is shown.
　他方、これらの例から推測できるように、図面に具体例を示さないが、第１配置形態と第２配置形態とを組み合せて配置することも可能である。 On the other hand, as can be inferred from these examples, a specific example is not shown in the drawings, but the first arrangement form and the second arrangement form may be combined and arranged.
　全列について、第１配置形態や第２配置形態を採用しないで、それらの配置形態を途中まで採用する場合も、前述のように、配置比ε＝ｈ２（第２基準加熱管Ｓ２の同心円ｒ２－第１基準（最内）加熱管Ｓ１の同心円ｒ１）／ｈ１（回転筒内面－第１基準（最内）加熱管Ｓ１の同心円ｒ１）を、１／２超とするのが望ましい。 Even when the first arrangement form and the second arrangement form are not adopted for all the rows and those arrangement forms are adopted halfway, as described above, the arrangement ratio ε = h2 (the concentric circle r2 of the second reference heating tube S2). It is desirable that the concentric circle r1) of the first reference (innermost) heating tube S1) / h1 (the inner surface of the rotating cylinder—the concentric circle r1 of the first reference (innermost) heating tube S1) is greater than 1/2.
（作用効果）
　前記のように加熱管１１を曲線状または斜め直線状に配置することで、被処理物Ｗが落下する方向と被処理物Ｗが複数の加熱管１１の間に入り込む方向が近似し、落下した被処理物Ｗはその運動方向を大きく変えずに複数の加熱管１１,１１の隙間に入り込む。加熱管１１,１１の隙間に入り込んだ被処理物Ｗは、回転筒１０の内側から外側へと流れ、回転筒１０の筒壁に到達する。加熱管１１の配置を選定することで、加熱管１１の隙間に被処理物Ｗが速やかに入り込み、加熱管１１の外側（回転筒１０の中心側）に滞留せず、被処理物Ｗと加熱管１１の接触が良くなるため、乾燥効率を向上させることができる。また、被処理物Ｗと加熱管１１の接触面積が増大し、両者の接触時間も増えるため、この点からも乾燥効率を向上させることができる。 (Function and effect)
As described above, the heating tube 11 is arranged in a curved line or an oblique straight line, so that the direction in which the workpiece W falls and the direction in which the workpiece W enters between the plurality of heating tubes 11 are approximated and dropped. The workpiece W enters the gaps between the plurality of heating tubes 11 and 11 without greatly changing the direction of movement. The workpiece W that has entered the gap between the heating tubes 11 and 11 flows from the inside to the outside of the rotating cylinder 10 and reaches the cylinder wall of the rotating cylinder 10. By selecting the arrangement of the heating tube 11, the workpiece W quickly enters the gap between the heating tubes 11 and does not stay outside the heating tube 11 (center side of the rotating cylinder 10), and is heated with the workpiece W. Since the contact of the tube 11 is improved, the drying efficiency can be improved. Moreover, since the contact area of the to-be-processed object W and the heating pipe | tube 11 increases and both contact time also increases, drying efficiency can be improved also from this point.
　また、被処理物Ｗが加熱管１１,１１の隙間に滑らかに入り込むため、被処理物Ｗから加熱管１１が受ける衝撃が小さくなる。そのため、従来のように加熱管１１を配置した場合と比べて、加熱管１１の直径を小さくすることができ、加熱管１１の本数を増やすことができる。その結果、全体として加熱管１１の伝熱面積が増え、乾燥効率を向上させることができる。 Further, since the workpiece W smoothly enters the gap between the heating tubes 11 and 11, the impact received by the heating tube 11 from the workpiece W is reduced. Therefore, compared with the case where the heating tube 11 is arrange | positioned like before, the diameter of the heating tube 11 can be made small and the number of the heating tubes 11 can be increased. As a result, the heat transfer area of the heating tube 11 increases as a whole, and the drying efficiency can be improved.
　そのほか、従来の装置では、落下する被処理物Ｗと加熱管１１とが衝突することにより、被処理物Ｗ（粉粒体）の破砕が生じていたが、前述の好適な形態によれば、破砕を防ぐ又は抑制できる。その結果、最終製品（乾燥製品）の粒度分布が安定するとともに、微粉が減少して排気処理設備の負荷を下げることもできる。 In addition, in the conventional apparatus, the object to be processed W (powder particles) was crushed by the collision of the object to be processed W and the heating tube 11, but according to the above-mentioned preferred embodiment, Crushing can be prevented or suppressed. As a result, the particle size distribution of the final product (dried product) can be stabilized, and the fine powder can be reduced to reduce the load on the exhaust treatment facility.
　なお、各加熱管１１，１１…の直径や肉厚は適宜選択できる。 In addition, the diameter and thickness of each heating tube 11, 11 ... can be selected suitably.
（加熱管１１の本数）
　同心円上にある加熱管１１の本数を全て同じにしても良いが、加熱管１１を直線状に設けた場合には、図２０に示すように、回転筒１０の最外周から中間付近までの加熱管１１の本数を、回転筒１０の中間付近から最内周までの加熱管１１の本数より多くした方が良い。このように、中間付近から最外周までの加熱管１１の本数を増やすことで、隣り合う加熱管１１，１１の間の距離を最内周から最外周までほぼ同じにすることができる。そして、加熱管１１の本数を増やすことで、加熱管１１の伝熱面積が増え、回転筒１０の外周側へ移動した被処理物Ｗの乾燥効率を向上させることができる。 (Number of heating tubes 11)
The number of the heating tubes 11 on the concentric circles may be the same, but when the heating tubes 11 are provided in a straight line, the heating from the outermost periphery to the middle of the rotating cylinder 10 is performed as shown in FIG. It is better to increase the number of the tubes 11 than the number of the heating tubes 11 from the middle of the rotating cylinder 10 to the innermost periphery. Thus, by increasing the number of the heating tubes 11 from the vicinity of the middle to the outermost periphery, the distance between the adjacent heating tubes 11, 11 can be made substantially the same from the innermost periphery to the outermost periphery. And by increasing the number of the heating tubes 11, the heat transfer area of the heating tube 11 increases, and the drying efficiency of the workpiece W moved to the outer peripheral side of the rotating cylinder 10 can be improved.
（加熱管１１の直径）
　加熱管１１の直径を全て同じにしても良いが、図１７に示すように、回転筒１０の内周側から外周側へ向かうに連れて、次第に直径を大きくすることもできる。このように、加熱管１１の直径を変えることで、隣り合う加熱管１１の間の距離を内周から外周までほぼ同じにすることができる。このように加熱管１１の直径を大きくすることで、加熱管１１の伝熱面積が増え、回転筒１０の外周側へ移動した被処理物Ｗの乾燥効率を向上させることができる。 (Diameter of heating tube 11)
Although all the diameters of the heating tubes 11 may be the same, as shown in FIG. 17, the diameter can be gradually increased from the inner peripheral side to the outer peripheral side of the rotating cylinder 10. Thus, by changing the diameter of the heating tube 11, the distance between the adjacent heating tubes 11 can be made substantially the same from the inner periphery to the outer periphery. By increasing the diameter of the heating tube 11 in this way, the heat transfer area of the heating tube 11 is increased, and the drying efficiency of the workpiece W moved to the outer peripheral side of the rotating cylinder 10 can be improved.
（加熱管１１の配列の決め方）
　加熱管１１の配列の決定方法について、図１７を参照しながら説明する。なお、加熱管１１の配列を「行列」で表し、回転筒１０の径方向（回転筒１０の中心側から外側へ向かう方向）の配列を「列」とし、円周方向の配列を「行」とする。 (How to determine the arrangement of the heating tubes 11)
A method for determining the arrangement of the heating tubes 11 will be described with reference to FIG. The arrangement of the heating tubes 11 is represented by a “matrix”, the arrangement in the radial direction of the rotating cylinder 10 (the direction from the center side of the rotating cylinder 10 toward the outside) is “column”, and the arrangement in the circumferential direction is “row”. And
　隣接する行間の距離（例えば、行１と行２の間の距離）及び隣接する列間の距離（例えば、列１と列２の間の距離）を変えることにより、被処理物Ｗの分散性や流動性を変えることができる。 Dispersibility of the workpiece W by changing the distance between adjacent rows (for example, the distance between rows 1 and 2) and the distance between adjacent columns (for example, the distance between columns 1 and 2). And change the fluidity.
　例えば、図１７のハッチングを施した加熱管１１（以下、「基準加熱管１１」という。）を基準にして考えると、行間距離として、（１）の加熱管１１と基準加熱管１１の距離、（５）の加熱管１１と基準加熱管１１の距離のほか、（２）の加熱管１１と基準加熱管１１の距離、（８）の加熱管１１と基準加熱管１１の距離、（４）の加熱管１１と基準加熱管１１の距離、（６）の加熱管１１と基準加熱管１１の距離が考えられ、これらが前記一定値以上になるようにする。また、列間距離として、（３）の加熱管１１と基準加熱管１１の距離、（７）の加熱管１１と基準加熱管１１の距離が考えられ、これらも前記一定値以上になるようにする。なお、隣接する加熱管１１の距離は８０～１５０ｍｍにすることが好ましい。 For example, considering the hatched heating tube 11 (hereinafter referred to as “reference heating tube 11”) in FIG. 17 as a reference, the distance between the rows is the distance between the heating tube 11 and the reference heating tube 11 in (1), In addition to the distance between the heating tube 11 and the reference heating tube 11 in (5), the distance between the heating tube 11 and the reference heating tube 11 in (2), the distance between the heating tube 11 and the reference heating tube 11 in (8), (4) The distance between the heating tube 11 and the reference heating tube 11 and the distance between the heating tube 11 and the reference heating tube 11 in (6) are considered, and these are set to be equal to or greater than the predetermined value. Further, as the inter-column distance, the distance between the heating tube 11 and the reference heating tube 11 in (3) and the distance between the heating tube 11 and the reference heating tube 11 in (7) can be considered, and these are also equal to or greater than the predetermined value. To do. The distance between adjacent heating tubes 11 is preferably 80 to 150 mm.
　以上のように、行間距離及び列間距離が、加熱管１１の配列を決定する際の拘束条件となる。この拘束条件に従いつつ、出来る限り伝熱面積が広くなり、かつ流動性が良くなるように、加熱管１１の径、行数及び列数を変えて様々なバリエーションを試し、最も伝熱面積が広くなり、かつ流動性が良くなる配列を採用し、製品を設計する。なお、実際に加熱管１１の配列を検討した結果、行の曲率を次第に大きくした場合は、加熱管１１の径を次第に小さくし、列数を次第に多くすることで、伝熱面積を最も広くすることができた。逆に、行の曲率を次第に小さくした場合は、加熱管１１の径を次第に大きくし、列数を次第に少なくすることで、伝熱面積を最も広くすることができた。 As described above, the distance between the rows and the distance between the columns are the constraint conditions when determining the arrangement of the heating tubes 11. While following this restraint condition, in order to increase the heat transfer area as much as possible and improve the fluidity, various variations were tried by changing the diameter, the number of rows and the number of columns of the heating tube 11, and the heat transfer area was the widest. The product is designed by adopting an arrangement that improves fluidity. As a result of actually examining the arrangement of the heating tubes 11, when the curvature of the row is gradually increased, the diameter of the heating tube 11 is gradually decreased and the number of columns is gradually increased, so that the heat transfer area is maximized. I was able to. Conversely, when the row curvature was gradually reduced, the heat transfer area could be maximized by gradually increasing the diameter of the heating tube 11 and gradually decreasing the number of columns.
１０　回転筒
１１　スチームチューブ（加熱管）
４１　供給口
５０　排出口
５５　分級フード
５６　固定排気口
５７　固定排出口
６０　掻上板
Ａ　　キャリアガス
Ｅ　　処理物
Ｗ　　被処理物 10 Rotating cylinder 11 Steam tube (heating tube)
41 Supply port 50 Discharge port 55 Classification hood 56 Fixed exhaust port 57 Fixed exhaust port 60 Raising plate A Carrier gas E Processed object W Processed object

Claims (3)

  1. 　一端側に被処理物の供給口を、他端側に被処理物の排出口を有し、軸心周りに回転自在な回転筒と、加熱媒体が通る多数の加熱管を前記回転筒内に設け、前記回転筒の回転に伴って加熱管群により被処理物を回転方向に掻き上げる構成であり、
    　被処理物を前記回転筒の一端側に供給して他端側から排出する過程で、前記加熱管群により被処理物を加熱して乾燥させる横型回転式乾燥機において、
    　前記加熱管が、前記回転筒の軸心を中心として実質的に同心円を成すように周方向及び径方向に複数配列され、それぞれの加熱管の間には隙間が設けられ、
    　その中心側円上の第１基準加熱管芯から、第２基準加熱管芯までを繋ぐ繋ぎ線が、次記（１）または（２）の配置形態の一つ又はこれらを組み合わせた配置形態から選択され、その選択された配置形態で前記加熱管が配置されている：
    　（１）各加熱管芯が、前記第１基準加熱管芯と第２基準加熱管芯とを直接繋ぐ直線Ｌ１上に位置しており、さらに、前記第１基準加熱管芯を通る半径放射線に対して、前記第２基準加熱管芯が、回転筒の回転方向後方に位置している第１配置形態、
    　（２）各加熱管芯が、前記第１基準加熱管芯と前記第２基準加熱管芯とを繋ぐ曲線Ｌ２上に位置しており、かつ、前記第２基準加熱管芯に向かうほど回転筒の回転方向後方に位置しており、さらに、前記第１基準加熱管芯を通る半径放射線に対して、前記第２基準加熱管芯が、回転筒の回転方向後方に位置している第２配置形態；
    　ことを特徴とする横型回転式乾燥機。     A supply port for the object to be processed is provided on one end side, and a discharge port for the object to be processed is provided on the other end side. A rotating cylinder rotatable around the axis and a number of heating tubes through which a heating medium passes are provided in the rotating cylinder. Provided, and is configured to scoop up the object to be processed by the heating tube group along with the rotation of the rotating cylinder,
    In the process of supplying the workpiece to one end of the rotating cylinder and discharging it from the other end, in the horizontal rotary dryer that heats and drys the workpiece by the heating tube group,
    A plurality of the heating tubes are arranged in the circumferential direction and the radial direction so as to form a substantially concentric circle around the axis of the rotating cylinder, and a gap is provided between each heating tube,
    The connecting line that connects the first reference heating tube core to the second reference heating tube core on the center side circle is one of the following arrangement forms (1) or (2) or an arrangement form combining these. The heating tube is arranged in the selected arrangement form selected:
    (1) Each heating tube core is located on a straight line L1 directly connecting the first reference heating tube core and the second reference heating tube core, and further, the radiation radiation passes through the first reference heating tube core. On the other hand, the first reference form in which the second reference heating tube core is located behind the rotating cylinder in the rotation direction,
    (2) Each heating tube core is positioned on a curve L2 that connects the first reference heating tube core and the second reference heating tube core, and the rotating cylinder becomes closer to the second reference heating tube core. A second arrangement in which the second reference heating tube core is positioned rearward in the rotation direction of the rotating cylinder with respect to radial radiation passing through the first reference heating tube core. Form;
    A horizontal rotary dryer characterized by that.
  2. 　配置比ε＝離間距離ｈ２（第２基準加熱管の同心円－第１基準加熱管の同心円）／離間距離ｈ１（回転筒内面－第１基準加熱管の同心円）が、１／２超とする範囲で、前記（１）または（２）の配置形態の一つ又はこれらを組み合わせた配置形態が採られている請求項１記載の横型回転式乾燥機。 Arrangement ratio ε = separation distance h2 (concentric circle of the second reference heating pipe−concentric circle of the first reference heating pipe) / separation distance h1 (inner surface of the rotating cylinder−concentric circle of the first reference heating pipe) exceeds 1/2 2. The horizontal rotary dryer according to claim 1, wherein one of the arrangement forms (1) or (2) or an arrangement form combining these is adopted.
  3. 　前記第１基準管の同心円から少なくとも４番目の加熱管の同心円の範囲で、前記（１）または（２）の配置形態の一つ又はこれらを組み合わせた配置形態が採られている請求項１記載の横型回転式乾燥機。 2. The arrangement form according to claim 1, wherein one of the arrangement forms of (1) or (2) or a combination thereof is employed in a range from the concentric circle of the first reference pipe to the concentric circle of at least the fourth heating pipe. Horizontal rotary dryer.
PCT/JP2015/060495 2014-04-11 2015-04-02 Horizontal rotary dryer WO2015156205A1 (en)

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