JP7305092B2 - DRYING AND COOLING METHOD AND DRYING AND COOLING DEVICE FOR SUBJECT TO PROCESS - Google Patents

Description

The present invention provides a drying and cooling method for an object to be treated using a rotating body, such as a steam tube dryer, which is rotated about an axis extending horizontally so as to incline downward from one end to the other end, and a drying and cooling method. It is related to the device.

In such a drying cooling method and a drying cooling apparatus for an object to be treated, for example, Patent Document 1 describes a method and an apparatus for recovering by-product salts, in which water to be treated containing salt is concentrated and the concentrated water is dried. After that, it is heated to 300 to 550° C. in an inert gas atmosphere and then rapidly cooled. A device for recovering by-product salt is described, which is connected by a path from a concentration water tank, through a drying and calcining furnace, to a cooling vessel.

JP-A-11-304131

However, in the drying/cooling method and the drying/cooling apparatus for the object to be processed described in Patent Document 1, the drying/calcining furnace and the cooling vessel are independent devices, and therefore the drying/calcining furnace is separated from the cooling container. It takes time to transport the object to be processed to the cooling container. In addition, transportation equipment such as conveyors, rotary valves, etc. are required at the connection with the drying/burning furnace in the transportation route of the processed material, and flexible piping is required to absorb the thermal expansion of the drying/burning furnace. and requires frequent maintenance and replacement due to wear and thermal effects.

In addition, if the drying/calcining furnace and the cooling container are separate devices, cooling is performed below the drying/calcining furnace as shown in FIGS. When the container is arranged, the height of the entire device increases, while when the drying/calcining furnace and the cooling container are arranged in series, the total length of the entire device becomes long, and the transportation route and maintenance area described above are increased. A large space is required in any case, including securing such as. Moreover, since the drying/calcining furnace and the cooling container are operated independently, the operation control becomes complicated especially when the treatment is performed continuously.

Furthermore, in the drying and cooling device for the object to be processed described in Patent Document 1, both the drying/calcining furnace and the cooling container are configured to rotate by a motor, and the rotating drying/calcining furnace and the cooling container In addition, sealability is required at the connection portions with the supply route of the non-rotating processed object, the transfer route, and the discharge route. .

Furthermore, when a carrier gas is supplied to and discharged from the drying/calcining furnace and the cooling container, the discharged carrier gas may be accompanied by fine powder of the material to be processed, and the drying/calcining furnace and the cooling container In each of the above, product loss of the material to be processed occurs, and it is necessary to process the discharged carrier gas.

The present invention has been devised under such circumstances. It does not require rotary valves or flexible piping to absorb the thermal expansion of the rotating body. It is an object of the present invention to provide a drying and cooling method and a drying and cooling apparatus capable of reducing product loss due to fine powder and the like entrained in gas and carrier gas.

In order to solve the above problems and achieve these objects, the method for drying and cooling the object to be processed of the present invention provides a method for drying and cooling an object to be processed, which rotates around an axis extending in a lateral direction so as to incline downward from one end to the other end. The object to be processed supplied from the one end side to the inside of the rotating body is conveyed to the other end side by the cylindrical rotating body centered on the axis line that is rotated in the direction of rotation, and is prepared on the one end side of the rotating body. The object to be processed is indirectly heated and dried by the heating means, and the object to be processed heated and dried by the heating means is cooled by the cooling means provided on the other end side of the rotating body. It is characterized by indirect cooling and discharge.

Further, the apparatus for drying and cooling the material to be processed of the present invention is rotated about an axis extending in the horizontal direction so as to be inclined downward from one end side to the other end side, and is supplied to the inside from the one end side. A cylindrical rotating body centered on the axis for conveying the object to be processed to the other end side, and a rotating body provided at the one end side of the rotating body and supplied from the one end side to the inside of the rotating body. A heating means for indirectly heating and drying the object to be processed, and a cooling means provided on the other end side of the rotating body for indirectly cooling the object to be processed that has been heated and dried by the heating means. It is characterized by having

In the method for drying and cooling the object to be processed and the apparatus for drying and cooling the object thus constructed, the object to be processed supplied from one end side of the rotating body to the inside is conveyed to the other end side as the rotating body rotates. , First, it is indirectly heated and dried by a heating means provided on one end side of the rotating body, then conveyed to the other end side of the same rotating body, and cooled by a cooling means provided on this other end side, Ejected.

That is, the heating means for heating and drying the supplied object to be processed and the cooling means for cooling the object to be processed heated and dried by the heating means are arranged at one end side and the other end side of one rotating body. Since it is arranged in the , it is possible to continuously heat, dry, and cool the object to be processed. Therefore, the transportation time required from heating and drying to cooling can be shortened.

In addition, there is no need for conveying equipment such as conveyors, rotary valves, flexible piping, etc. at the connection part of the conveying route. Since the transport path itself between the The installation space can be reduced, and the equipment cost can be reduced. Furthermore, since the object to be processed can be transported by rotating only one rotating body, the operation control becomes easy and the running cost can be reduced.

Moreover, since only one supply path and one discharge path for the non-rotating object to be processed are required for the rotating rotating body, the drying and cooling method for the object to be processed and the drying and cooling apparatus for the object to be processed described in Patent Document 1 are sufficient. As in the case where the drying/calcining furnace and the cooling container are connected by a conveying route, a sealing material is provided at the connection between the conveying route, the drying/calcining furnace, and the cooling container, or a sealing gas is supplied. You don't have to.

Furthermore, even when the carrier gas is supplied to and discharged from the inside of the rotating body, only one carrier gas discharge port is required. It is possible to suppress the product loss of the object to be processed, and the carrier gas discharged from this one exhaust port can be collected and processed, and the carrier gas can be easily processed.

Here, in the heating means, a plurality of heating heat transfer tubes extending in the axial direction are arranged in the circumferential direction on the inner peripheral portion of one end side of the rotating body, and the heating heat transfer tubes are provided from the one end side to the heating heat transfer tubes. By supplying a heat medium having a higher temperature than the object to be treated supplied to the inside of the rotating body and indirectly heating and drying the object to be treated, heat transfer is performed by a heat transfer tube having a large contact area with the object to be treated. The heat efficiency can be improved, and the stirring of the object to be treated by the heating heat transfer tube can be promoted, so that the object to be treated can be efficiently heated and dried. Steam can be used as a heat medium having a temperature higher than that of the supplied material to be treated, as in the case of the steam tube dryer.

Further, in the case of using a heating heat transfer tube to which a heat medium having a temperature higher than that of the object to be processed is supplied as the heating means, the heating means on the one end side of the rotating body and the cooling means on the other end side of the rotating body are used. A hollow wall-shaped heating manifold protruding from the inner peripheral surface of the rotating body to the inner peripheral side is provided at the boundary with the means, and the inside of the rotating body on the inner peripheral side of the heating manifold is provided with the above-mentioned to-be-processed It is preferable that a heating means passing hole through which an object passes from the one end side of the rotating body to the other end side is formed, and the hollow portion of the heating manifold is opened so as to communicate with the heating heat transfer tube.

As a result, the object to be treated can be dammed up to some extent by the heating manifold, stay at one end of the rotor, and be heated by the heating heat transfer tube, and the object to be treated can also be heated by the heating medium supplied to the hollow portion of the heating manifold. can be heated, efficient drying of the object to be treated can be achieved.

Further, on the other end side of a boundary portion between the heating means on the one end side of the rotating body and the cooling means on the other end side, a heat medium supply connection for supplying the heat medium to the heating means is provided. By arranging a pipe and a discharge connecting pipe for discharging the heat medium from the heating means so as to extend along the outer peripheral portion of the rotating body, the heat medium passing through the supply connecting pipe and the discharge connecting pipe It is possible to prevent the cooling effect of the cooling means from being impaired.

On the other hand, also in this cooling means, a plurality of cooling heat transfer tubes extending in the axial direction are arranged in the inner peripheral portion of the other end side of the rotating body in the circumferential direction, and the cooling heat transfer tubes are heated by the heating means. By indirectly cooling the object to be processed by supplying a coolant having a temperature lower than that of the object to be processed that has been dried and dried, the cooling heat transfer pipe can secure a contact area with the object to be processed, and It is possible to improve the cooling effect by agitating the processed material with the cooling heat transfer tube. Water can be used as a coolant having a temperature lower than that of the object to be processed that has been heated and dried by the heating means.

Furthermore, in this case also, the heating means on the one end side of the rotating body and the cooling means on the other end side are arranged on the other end side of the boundary between the heating means on the one end side and the cooling means on the other end side of the rotating body. a hollow wall-shaped cooling manifold protruding toward the inner circumference of the cooling manifold, and a cooling means passage hole for passing the object to be processed to the other end side of the rotating body is provided inside the rotating body on the inner peripheral side of the cooling manifold. In addition, the cooling heat transfer pipe is communicated with and opened in the hollow portion of the cooling manifold, so that the cooling manifold dams up the object to be processed to some extent and stays on the other end side of the rotating body, and the cooling heat transfer pipe The object to be processed can be efficiently cooled by the coolant supplied to the cooling manifold and the coolant supplied to the hollow portion of the cooling manifold.

Furthermore, when a carrier gas is supplied to the inside of the rotating body, a carrier gas supply port is provided on the other end side of the rotating body, and an exhaust port for the carrier gas is provided on the one end side of the rotating body. is provided, and a carrier gas is supplied from the other end side to the inside of the rotating body, and the carrier gas is discharged from the one end side. In addition, it is possible to prevent the carrier gas heated by the heating means from flowing to the other end side from impairing the cooling effect of the cooling means.

As described above, according to the present invention, it is possible to shorten the transportation time of the object to be processed, reduce the frequency of maintenance and replacement of piping, and save the installation space of the entire apparatus. It is possible to facilitate operation control and reduce product loss due to fine powder and the like entrained in sealing materials, seal gas, and carrier gas of the rotating body.

1 is a side cross-sectional view along the axis of a rotating body showing an outline of an embodiment of a heating and cooling device for an object to be processed according to the present invention; FIG. 2 is a detailed enlarged side cross-sectional view of the other end side of the rotating body of the embodiment shown in FIG. 1 (however, illustration of an outlet for an object to be processed, a supply port for carrier gas, etc. is omitted); 2 is a detailed enlarged side cross-sectional view of the axially central portion of the rotating body of the embodiment shown in FIG. 1; FIG.

1 to 3 show an embodiment of a drying and cooling apparatus for an object to be processed according to the present invention. In this embodiment, the rotating body 1 is made of a metal material such as steel and formed into a cylindrical shape centered on the axis O. The axis O extends from one end side of the rotating body 1 (left side in FIGS. It extends in the lateral direction with a slight downward inclination toward the other end (the right side in FIGS. 1 to 3).

As shown in FIG. 1, on the outer peripheral portion of the rotating body 1, annular tires 1A centered on the axis O are provided on the one end side and the other end side so as to protrude to the outer peripheral side. Between them, an annular driven gear 1B centered on the axis O is provided so as to protrude to the outer peripheral side. The rotating body 1 is supported so that the tires 1A are placed on support rollers (not shown) so as to be rotatable around the inclined axis O as described above, and is provided with a rotation driving means 2 such as a motor having a driving gear meshing with the driven gear 1B. is rotationally driven around the axis O by

One end of the rotating body 1 is provided with a supply device 3 for a material P to be dried and cooled. In this feeder 3, a screw feeder 3B is provided in a casing 3A. The screw feeder 3B has screw blades attached to the outer periphery of a screw shaft extending along the axis O. As shown in FIG.

By rotating the screw feeder 3B around the axis O by a driving device 3C such as a motor, the material to be processed P is fed into the casing 3A from a supply port 3D provided at the upper part of one end of the casing 3A. An object P to be processed is fed into the rotating body 1 from the center of one end of the rotating body 1 .

The feeding device 3 is supported by being fixed to the rotating body 1 so as not to rotate. They are airtightly connected while allowing rotation of the rotating body 1 via the first seal portion 1C having the attached sealing material.

Sealing gas A is supplied to each of the first seal portion 1C and the supply device seal portion 3E disposed between the screw feeder 3B and the drive device 3C of the supply device 3, thereby 1 and the inside of the casing 3A of the feeding device 3 are kept airtight. At the top of the casing 3A of the supply device 3, an exhaust port 3F for a carrier gas G, which will be described later, is provided on the other end side of the supply port 3D for the material P to be processed. Moreover, the supply device 3 may supply the material to be processed P by, for example, a vibrating feeder or a chute instead of using the screw feeder 3B.

On the other hand, at the other end of the rotating body 1, as shown in FIG. A supply/discharge device 5A for the coolant C in the cooling means 5 is provided. The supply/discharge device 4A for the heat medium B and the supply/discharge device 5A for the coolant C are also fixed and supported so as not to rotate with respect to the rotating rotating body 1, similarly to the supply device 3 for the object to be processed P. It is

At the other end of the rotating body 1, a triple tube-like connecting pipe 1D centered on the axis O protruding toward the other end along the axis O is attached so as to be rotatable integrally with the rotating body 1. As shown in FIG. Of the triple pipes of the connecting pipe 1D, the innermost pipe 1Da and the middle inner pipe 1Db, which are double pipes on the inner peripheral side, extend to the vicinity of the end plate 1b covering the other end of the rotating body 1. As shown in FIG.

Further, the innermost pipe 1Da on the innermost peripheral side is arranged so that the supply pipe 4Aa for the heat medium B in the supply/discharge device 4A of the heating means 4 extends upward in the radial direction with respect to the axis O, and this In the middle inner tube 1Db on the outer peripheral side of the innermost tube 1Da, the rotating bodies 1 of the innermost tube 1Da and the middle inner tube 1Db are arranged so that the discharge pipe 4Ab for the heat medium B extends downward in the radial direction with respect to the axis O. are slidably and airtightly connected to allow integral rotation of the

Here, the heat medium B of the heating means 4 supplied from the supply pipe 4Aa is a fluid having a higher temperature than the object to be processed P supplied from one end side of the rotating body 1, and in this embodiment, steam (steam). The heat medium B, which has heated the object P and cooled itself, is drained and discharged from the discharge pipe 4Ab. The supply pipe 4Aa for the heat medium B is arranged closer to one end in the direction of the axis O than the discharge pipe 4Ab.

An outer tube 1Dd on the outermost periphery of the connecting tube 1D is connected to the end plate 1b on the other end side of the rotating body 1. As shown in FIG. A supply pipe 5Aa for the coolant C in the supply/discharge device 5A of the cooling means 5 extends downward in a radial direction with respect to the axis O, and a discharge pipe 5Ab for the coolant C is provided on the outer periphery of the outer pipe 1Dd. It is provided so as to extend upward in a radial direction with respect to the axis O. As shown in FIG. The supply pipe 5Aa for the coolant C is arranged closer to one end in the direction of the axis O than the discharge pipe 5Ab. The coolant B is a fluid having a lower temperature than the object P heated and dried by the heating means 4, and is water (cooling water) in this embodiment. Furthermore, the diameter of the outer tube 1Dd is smaller than the diameter of the rotor 1 as shown in FIG.

Here, on the outer periphery of the outer tube 1Dd, as shown in FIG. 2, an annular cover 5B centered on the axis O is liquid-tightly attached to the outer periphery of the outer tube 1Dd via a seal member 5C and rotates. It is attached so as to allow the rotation of the outer tube 1Dd that rotates integrally with the body 1 . In the cover 5B, a rectangular hollow refrigerant supply portion 5Ba and a refrigerant discharge portion 5Bb having a cross section along the axis O extending in the direction of the axis O are formed side by side in the direction of the axis O while being isolated from each other. These coolant supply portion 5Ba and coolant discharge portion 5Bb are open to the outer peripheral surface of the outer tube 1Dd, the coolant C supply pipe 5Aa is connected to the coolant supply portion 5Ba, and the coolant C discharge pipe 5Ab is connected to the coolant C supply pipe 5Ab. It is connected to the discharge part 5Bb.

In addition, in the inner peripheral portion of the outer tube 1Dd, a plurality of supply connection pipes 5Ca and discharge pipes 5Ca for the refrigerant C are provided near the inner peripheral surface of the outer tube 1Dd at intervals in the radial direction with respect to the axis O from the middle inner tube 1Db. The connecting pipes 5Cb are arranged alternately in the circumferential direction. The supply connecting pipe 5Ca and the discharge connecting pipe 5Cb for the refrigerant C are opened at the other end to the outer peripheral surface of the outer pipe 1Dd and communicate with the refrigerant supply portion 5Ba and the refrigerant discharge portion 5Bb, respectively. It extends toward one end side in the direction of the axis O along the surface.

On the other hand, a supply connecting pipe 4Ba and a discharge connecting pipe 4Bb for the heating medium B are connected to one end of the innermost pipe 1Da and the middle inner pipe 1Db of the connecting pipe 1D, respectively. The supply connecting pipe 4Ba and the discharge connecting pipe 4Bb for the heat medium B are connected to the innermost pipe 1Da and the middle inner pipe 1Db from one end of the innermost pipe 1Da and the middle inner pipe 1Db in opposite directions in the radial direction with respect to the axis O, respectively. After extending so as not to interfere with the discharge connecting pipe 5Cb and protruding to the outer circumference of the outer pipe 1Dd, the outer circumference of the rotating body 1 extends toward one end side in the direction of the axis O.

Although not shown in FIG. 2, the supply connecting pipe 4Ba and the discharge connecting pipe 4Bb for the heat medium B protrude from the outer circumference of the outer pipe 1Dd of the connecting pipe 1D. On the other end side of the position, as shown in FIG. The discharge port 6 for the object to be processed P and the supply port 7 for the carrier gas G are formed between the lower portion and the upper portion of a cylindrical cover 8 centered on the axis O provided so as to cover the outer peripheral portion of the outer tube 1Dd. are provided in each.

Here, the cover 8 is fixed and supported so as not to rotate with respect to the rotating outer tube 1Dd. A second seal portion 8a having a sealing material is interposed at one end side and the other end side of the port 7, and the seal gas A is supplied to the second seal portion 8a, whereby the inside of the outer tube 1Dd is , the outlet 6 and the supply port 7 are hermetically sealed.

A plurality of openings are formed in the outer tube 1Dd at intervals in the circumferential direction in accordance with the positions of the discharge port 6 and the supply port 7 in the direction of the axis O. The object to be processed P is discharged when the position of the discharge port 6 is reached by the rotation of the integral connecting pipe 1D, and the carrier gas G is supplied when the position of the supply port 7 is reached.

Further, the supply connecting pipe 4Ba and the discharge connecting pipe 4Bb of the heat medium B extending to one end side of the outer peripheral portion of the rotating body 1 are located at a position approximately 1/2 the length of the rotating body 1 in the direction of the axis O. , a hollow-walled heating manifold 9 protruding inwardly from the inner peripheral surface of the rotating body 1 provided at the boundary between the heating means 4 at one end of the rotating body 1 and the cooling means 5 at the other end. It is connected to the.

As shown in FIG. 3, the heating manifold 9 has a rectangular cross section along the axis O and is formed in an annular shape centered on the axis O, and protrudes toward the outer periphery of the rotating bodies 1 that are isolated from each other. A heat medium supply chamber 9A and a heat medium discharge chamber 9B protruding toward the inner peripheral side of the rotating body 1 are provided. The supply connecting pipe 4Ba for the heat medium B is connected to the heat medium supply chamber 9A, and the discharge connecting pipe 4Bb for the heat medium B is connected to the heat medium discharge chamber 9B. A portion of the rotating body 1 on the inner peripheral side of the heat medium discharge chamber 9B is open from one end side to the other end side of the rotating body 1 and serves as a heating means passage hole 9C.

From the heat medium supply chamber 9A to the heat medium discharge chamber 9B, a plurality of heating heat transfer tubes 4C of the heating means 4 are arranged at intervals in the circumferential direction on the inner peripheral portion of the one end side of the rotating body 1. ing. Each of these heating heat transfer tubes 4C extends from the heating medium supply chamber 9A toward the inner peripheral surface of the rotating body 1 toward one end side in parallel with the axis O, and after penetrating the end plate 1a on the one end side of the rotating body 1, The inner peripheral side of the rotating body 1 is bent toward the other end side from the inner peripheral side of the rotating body 1 toward the other end side in a U-shape, and the inner peripheral side of the rotating body 1 extends toward the other end side from the portion extending toward the one end side, and penetrates the end plate 1a again. It extends parallel to the axis O and reaches the heat medium discharge chamber 9B, and communicates with the heat medium supply chamber 9A and the heat medium discharge chamber 9B, which are hollow portions of the heating manifold 9, and opens.

On the other hand, in this embodiment, as shown in FIG. 2, the inner peripheral surface of the rotating body 1 is also provided on the other end side of the boundary between the heating means 4 on the one end side of the rotating body 1 and the cooling means 5 on the other end side. A cooling manifold 10 having a hollow wall shape protruding toward the inner peripheral side is provided. A discharge connecting pipe 5Cb for the coolant C, which is connected to the pipe 5Ab through the coolant discharge portion 5Bb, is connected to the cooling manifold 10 . The discharge port 6 and the supply port 7 including the cover 8 may be provided at one end of the cooling manifold 10 .

2, the cooling manifold 10 is also formed in an annular shape centered on the axis O with a square cross section along the axis O in the present embodiment. A coolant supply chamber 10A and a coolant discharge chamber 10B are provided. These coolant supply chamber 10A and coolant discharge chamber 10B are arranged along one end side of the end plate 1b on the other end side of the rotor 1, and the coolant supply chamber 10A is positioned on the outer peripheral side of the coolant supply chamber. A refrigerant discharge chamber 10B is located on the inner peripheral side of 10A.

A supply connecting pipe 5Ca for the refrigerant C extending from the refrigerant supply portion 5Ba to one end side is bent over the end plate 1b on the other end side of the rotating body 1 and extends to the outer peripheral side, and is connected to the refrigerant discharge chamber on the inner peripheral side. 10B to communicate with the coolant supply chamber 10A. Further, the discharge connecting pipe 5Cb extending from the refrigerant discharge portion 5Bb to one end side is also bent at a point beyond the end plate 1b on the other end side of the rotating body 1 and extends to the outer peripheral side to form the refrigerant discharge chamber 10B on the inner peripheral side. is communicated with and opened. A cooling means passage hole 10C is formed in a portion on the inner peripheral side of the rotating body 1 from the coolant discharge chamber 10B, so that the workpiece P is moved from one end side of the cooling manifold 10 on the rotating body 1 to the other end side. It can pass through the outer tube 1Dd of the connecting tube 1D.

From the coolant supply chamber 10A to the coolant discharge chamber 10B, a plurality of cooling heat transfer pipes 5D of the cooling means 5 are arranged at intervals in the circumferential direction on the inner peripheral portion of the other end side of the rotating body 1. there is These cooling heat transfer tubes 5D also extend from the refrigerant supply chamber 10A toward the inner peripheral surface of the rotating body 1 toward one end side in parallel with the axis O, and before the heating manifold 9, from the inner peripheral side of the rotating body 1 It bends toward the end side in a U shape, extends parallel to the axis O toward the other end side of the inner peripheral side of the rotating body 1 from the portion extending toward the one end side, and reaches the refrigerant discharge chamber 10B. A coolant supply chamber 10A and a coolant discharge chamber 10B, which are hollow portions of the manifold 10, are communicated and opened.

In one embodiment of the drying and cooling method for the object to be processed P of the present invention using the drying and cooling apparatus for the object to be processed P configured as described above, the rotating body 1 is rotated about the axis O by the rotary drive means 2. At the same time, the workpiece P supplied from one end of the rotating body 1 by the supply device 3 to the inside is moved by the rotation of the rotating body 1 about the axis O and the downward inclination of the axis O of the rotating body 1. Convey to the other end side.

Then, the heat medium B supplied from the supply pipe 4Aa in the supply/discharge device 4A of the heating means 4 is directed toward one end of the rotating body 1 from the innermost pipe 1Da of the connecting pipe 1D as indicated by the solid line in FIG. The heat is supplied to the heating medium supply chamber 9A of the heating manifold 9 via the supply connecting pipe 4Ba, then supplied to the heating heat transfer tube 4C and flows to one end side of the rotating body 1, thereby being supplied from one end side of the rotating body 1. After the object P to be processed is indirectly heated and dried, the object P to be processed P is further indirectly heated by being folded back by the heating heat transfer tube 4C bent in a U shape at one end and flowing to the other end. and dry.

Further, the heat medium B, which has been cooled by heating and drying the object P, is discharged from the heating heat transfer pipe 4C to the heat medium discharge chamber 9B of the heating manifold 9, as indicated by the dashed line in FIG. Secondly, from the discharge connecting pipe 4Bb, it passes between the innermost pipe 1Da and the middle inner pipe 1Db of the connecting pipe 1D and is discharged from the discharge pipe 4Ab in the supply/discharge device 4A of the heating means 4.

Further, the workpiece P heated by the heating medium B at one end of the rotating body 1 and dried is transported to the other end and reaches the heating manifold 9, where it is dammed up and stays there. When the staying height from the inner peripheral surface of the rotating body 1 exceeds the protrusion height of the heating manifold 9 toward the inner peripheral side, the workpiece P thus retained climbs over the heating manifold 9 and passes through the heating means passage hole 9C. to the other end.

The workpiece P transported to the other end side of the rotating body 1 in this way is cooled by the cooling means 5 provided on the other end side. In the cooling means 5, the coolant C supplied from the supply pipe 5Aa in the coolant C supply/discharge device 5A is supplied to the supply connecting pipe 5Ca via the coolant supply portion 5Ba as indicated by the solid line in FIG. Furthermore, after the coolant is supplied from the coolant supply chamber 10A of the cooling manifold 10 to the cooling heat transfer pipe 5D and flows to one end side of the rotating body 1 to cool the object P to be processed, the cooling heat transfer pipe 5D is bent in a U shape at the one end side. and flows to the other end side, and further cools the object P to be processed.

Refrigerant C heated by cooling the object P is discharged from the cooling heat transfer pipe 5D into the refrigerant discharge chamber 10B of the cooling manifold 10 as shown by the dashed line in FIG. The coolant C is discharged from the discharge pipe 5Ab in the supply/discharge device 5A of the coolant C of the cooling means 5 via the coolant discharge portion 5Bb from 5Cb. Note that the cooling heat transfer pipe 5D may have a double pipe structure.

Further, while the object P to be processed is being dried and cooled in this manner, the carrier gas G is supplied to the inside of the rotating body 1 from the supply port 7 on the other end side of the rotating body 1 in this embodiment. It flows to the one end side, and is exhausted from the exhaust port 3F of the supply device 3 on the one end side together with gas and dust generated from the object P to be processed when the object P to be processed is heated and dried. Furthermore, the object to be processed P, which has been dried by being heated by the heating means 4 on one end side of the rotating body 1 and then cooled by the cooling means 5 on the other end side, is discharged from the discharge port 6 .

In the drying and cooling method and the drying and cooling apparatus for the workpiece P having such a configuration, the workpiece P supplied from one end side of the rotating body 1 to the inside moves along the axis O downward as the rotating body 1 rotates. While being transported to the opposite end side, it is indirectly heated and dried by the heating means 4 provided on one end side of the rotating body 1, and then transported to the other end side of the same rotating body 1, where it is dried. It is cooled by the cooling means 5 provided on the other end and discharged.

Therefore, the heating means 4 for heating and drying the object P supplied in this way and the cooling means 5 for cooling the object P thus heated and dried are arranged on one end side of one rotating body 1. and the other end, the process from heating and drying the object P to cooling can be performed continuously. For this reason, compared with the drying and cooling method and the drying and cooling apparatus described in Patent Document 1, in which the heated and dried object to be processed is conveyed through the conveying route and cooled, it takes more time from heating and drying to cooling. The transportation time can be shortened, and the time required for heating, drying, and cooling the object P to be processed can be shortened.

In addition, as in the case of transporting the object to be processed through such a transport route, a transport device such as a conveyor or a rotary valve is required at the connection part of the transport route, or flexible piping is required. Therefore, maintenance and replacement of such equipment and piping are not required. Furthermore, since it is only necessary to rotate one rotating body 1 to transport the object P, the operation control can be facilitated and the running cost can be reduced.

Moreover, since the transport path itself between heating, drying, and cooling is unnecessary, compared to the case where the drying/calcining furnace and the cooling vessel are arranged in series in the drying and cooling apparatus described in Patent Document 1, for example, the apparatus It is possible to reduce the installation space by making the whole compact, and to reduce the equipment cost.

Furthermore, since only one supply device 3 and one discharge port 6 for the non-rotating workpiece P are required for the rotating rotating body 1, the drying and cooling method and the drying cooling of the workpiece described in Patent Document 1 are sufficient. As in the case of equipment in which the drying/calcining furnace and the cooling container are connected by a conveying route, a sealing material is provided at the connection between the conveying route, the drying/calcining furnace, and the cooling container. No need to supply gas.

Furthermore, even when the carrier gas G is supplied to and discharged from the inside of the rotating body 1 as in the present embodiment, only one exhaust port 3F for the carrier gas G is required. The amount of fine powder of the material to be processed P that is discharged can be reduced, and the product loss of the material to be processed P can be suppressed. In addition, the carrier gas G can be easily treated because the carrier gas G discharged from the single exhaust port 3F can be dust-collected and treated.

Further, in the present embodiment, in the heating means 4, a plurality of heating heat transfer tubes 4C extending in the direction of the axis O are arranged in the circumferential direction on the inner peripheral portion on the one end side of the rotating body 1, and in the heating heat transfer tubes 4C A heating medium B having a temperature higher than that of the material to be processed P supplied from one end side of the rotating body 1 is supplied to indirectly heat and dry the material to be processed.

Regarding the heating means 4 and the cooling means 5, for example, the rotating body 1 has a double-pipe jacket structure, and the heating medium B and the refrigerant C are supplied between the inner and outer tubes of the double-pipe. However, by using the heating heat transfer tube 4C as the heating means 4 as in the present embodiment, it is possible to secure a large contact area with the object to be processed P and improve the heat transfer efficiency, and the heating heat transfer tube 4C also makes it possible to promote agitation of the object P to be processed, so that the object P to be processed can be efficiently heated and dried. Moreover, in this embodiment, since the heat medium B is steam, it is easy to handle. However, as the heat medium B, it is also possible to use heat medium oil or hot water other than steam.

Furthermore, in the present embodiment, when the heating heat transfer tube 4C is used as the heating means 4 in this way, a rotating A hollow-walled heating manifold 9 protruding from the inner peripheral surface of the body 1 to the inner peripheral side is provided. A heating means passage hole 9C is formed through which the material P passes from one end side to the other end side of the rotating body 1, and the heating medium supply chamber 9A and the heating medium discharge chamber 9B, which are hollow portions of the heating manifold 9, are provided with heating means. The heat transfer tubes 4C are communicated and opened.

Therefore, the material to be treated P supplied to one end of the rotating body 1 and heated and dried by the heating means 4 is dammed up to some extent by the heating manifold 9 as described above and stays at the one end of the rotating body 1. , is further heated by the heating heat transfer pipe 4C, and is also heated by the heat medium B supplied to the heat medium supply chamber 9A and the heat medium discharge chamber 9B, which are the hollow portions of the heating manifold 9. Efficient drying can be achieved.

In this embodiment, the heating heat transfer tube 4C extending from the heat medium supply chamber 9A is passed through the end plate 1a on the one end side of the rotor 1 and then bent in a U shape to communicate with the heat medium discharge chamber 9B. , the heat medium B, which itself has been cooled and turned into a liquid (hot water in this embodiment) by heating the object P to be processed, is discharged to the heat medium discharge chamber 9B. Then, the heating heat transfer pipe 4C may be sealed and the heat medium B, which has been cooled and turned into a liquid, may be discharged to the heat medium discharge chamber 9B through the same heating heat transfer pipe 4C.

Further, in the present embodiment, on the other end side of the boundary between the heating means 4 on the one end side of the rotor 1 and the cooling means 5 on the other end side, the heat medium B for supplying the heat medium B to the heating means 4 A supply connecting pipe 4Ba and a discharge connecting pipe 4Bb for discharging the heat medium B from the heating means 4 are arranged so as to extend along the outer peripheral portion of the rotating body 1. As shown in FIG. For this reason, it is possible to prevent the cooling effect of the cooling means 5 on the other end side of the boundary from being impaired by the heat medium B passing through the supply connecting pipe 4Ba and the discharge connecting pipe 4Bb. It is also possible to cool the object P.

On the other hand, in this embodiment, in the cooling means 5 as well, a plurality of cooling heat transfer pipes 5D extending in the direction of the axis O are arranged in the inner peripheral portion of the other end side of the rotating body 1 in the circumferential direction. Inside, a coolant C having a lower temperature than the object P heated and dried by the heating means 4 is supplied to indirectly cool the object P. As shown in FIG.

Therefore, in the cooling means 5 as well, a large contact area with the object P can be ensured by the cooling heat transfer pipe 5D, and the object P can be agitated by the cooling heat transfer pipe 5D, resulting in a cooling effect. can be improved. Further, in the present embodiment, since the coolant C supplied to the cooling heat transfer tubes 5D is water, it is also easy to handle. However, the coolant C may be a fluid having a temperature lower than that of the heat medium B, and a fluid such as a liquid other than water may be used as the coolant C.

Furthermore, in the present embodiment, in this cooling means 5 as well, the inner peripheral surface of the rotating body 1 is located on the other end side of the boundary between the heating means 4 on the one end side of the rotating body 1 and the cooling means 5 on the other end side. A hollow-walled cooling manifold 10 protruding to the inner peripheral side from the cooling manifold 10 is provided. A cooling means passage hole 10C is formed through which the coolant passes, and a cooling heat transfer pipe 5D is opened in communication with the coolant supply chamber 10A and the coolant discharge chamber 10B, which are the hollow portions of the cooling manifold 10 .

Therefore, even in this cooling means 5, the cooling manifold 10 can dam up the object P to some extent and cause it to stay on the other end side of the rotating body 1. The object P to be processed can be efficiently cooled by the coolant C supplied to the coolant supply chamber 10A and the coolant discharge chamber 10B of the cooling manifold 10 .

Furthermore, in the present embodiment, the carrier gas G is supplied to the inside of the rotating body 1 as described above. The G exhaust port 3F is provided in the supply device 3 on one end side of the rotating body 1, supplies the carrier gas G from the other end side into the rotating body 1, and discharges it from the one end side of the rotating body 1. I'm trying

Therefore, the carrier gas G heated by the heating means 4 provided on one end side of the rotating body 1 can be prevented from flowing to the other end side, so that the cooling effect of the cooling means 5 on the other end side is impaired. Therefore, it is possible to effectively cool the object P to be processed. However, the carrier gas G may be supplied from one end side of the rotor 1 and discharged from the other end side.

In the present embodiment, as described above, the heating means 4 on one end side of the rotating body 1 and the cooling means 5 on the other end side are positioned at approximately half the length of the rotating body 1 in the direction of the axis O. is provided, and the heating means 4 and the cooling means 5 have substantially the same length in the direction of the axis O of the rotating body 1. These heating means 4 and the cooling means 5 can be appropriately set according to the characteristics of the object P to be processed and the required processing conditions. That is, the length of the heating means 4 in the direction of the axis O may be longer than that of the cooling means 5 , and conversely, the length of the cooling means 5 in the direction of the axis O may be longer than that of the heating means 4 .

REFERENCE SIGNS LIST 1 rotator 1D connecting pipe 2 rotation drive means 3 supply device 3F exhaust port 4 heating means 4A supply/discharge device in heating means 4 4Aa supply pipe in heating means 4 4Ab discharge pipe in heating means 4 4Ba supply connection pipe in heating means 4 4Bb Discharge connecting pipe in heating means 4 4C Heating heat transfer pipe 5 Cooling means 5A Supply/discharge device in cooling means 5 5Aa Supply pipe in cooling means 5 5Ab Discharge pipe in cooling means 5 5Ba Refrigerant supply part 5Bb Refrigerant discharge part 5Ca Cooling means 5 Supply connecting pipe 5Cb in cooling means 5 Discharge connecting pipe 5D Cooling heat transfer pipe 6 Discharge port 7 Supply port 9 Heating manifold 9A Heat medium supply chamber 9B Heat medium discharge chamber 10 Cooling manifold 10A Refrigerant supply chamber 10B Refrigerant discharge chamber O Rotating body 1 Axis of P Workpiece A Seal gas B Heat medium C Refrigerant G Carrier gas

Claims (11)

By means of a cylindrical rotating body that rotates about the axis extending in the horizontal direction so as to incline downward from one end to the other end, the fuel is supplied from the one end to the inside of the rotating body. While conveying the object to be processed to the other end side,
Indirectly heating and drying the object to be processed by a heating means provided on the one end side of the rotating body,
A method for drying and cooling an object to be processed, in which the object to be processed that has been heated and dried by the heating means is indirectly cooled by cooling means provided on the other end of the rotating body and discharged,
In the heating means, a plurality of heating heat transfer tubes extending in the axial direction are arranged in the circumferential direction on the inner peripheral portion of the rotating body on the one end side. A heat medium having a higher temperature than the object to be processed supplied to the inside of the rotating body is supplied,
A hollow-walled heating manifold protruding inwardly from the inner peripheral surface of the rotating body is provided at the boundary between the heating means on the one end side of the rotating body and the cooling means on the other end side of the rotating body. and
A heating means passing hole is formed inside the rotating body on the inner peripheral side of the heating manifold for allowing the object to be processed to pass from the one end side of the rotating body to the other end side,
A method for drying and cooling an object to be processed, wherein a hollow portion of the heating manifold is open to communicate with the heating heat transfer pipe. In the heating means, a plurality of heating heat transfer tubes extending in the axial direction are arranged in the circumferential direction on the inner peripheral portion of the rotating body on the one end side. 2. Drying of the object to be processed according to claim 1, wherein a heating medium having a temperature higher than that of the object to be processed supplied to the inside of the rotating body is supplied to indirectly heat and dry the object to be processed. cooling method. 3. The method for drying and cooling an object to be processed according to claim 2, wherein said heat medium is steam. In the cooling means, a plurality of cooling heat transfer tubes extending in the axial direction are arranged in the circumferential direction on the inner peripheral portion of the other end side of the rotating body. 4. The object to be processed according to any one of claims 1 to 3, wherein the object to be processed is indirectly cooled by supplying a coolant having a temperature lower than that of the heated object to be processed. dry cooling method. 5. The method for drying and cooling an object to be processed according to claim 4, wherein the coolant is water. 6. The substrate according to any one of claims 1 to 5, characterized in that a carrier gas is supplied to the inside of the rotating body from the other end side, and the carrier gas is discharged from the one end side. A method for drying and cooling the processed material. The axis line is rotated about an axis line extending in a horizontal direction so as to be inclined downward from one end side to the other end side, and conveys to the other end side the material to be processed that has been supplied inside from the one end side. a cylindrical rotating body centered;
a heating means provided on the one end side of the rotating body for indirectly heating and drying an object to be processed supplied from the one end side to the inside of the rotating body;
cooling means provided on the other end side of the rotating body for indirectly cooling the object to be processed that has been heated and dried by the heating means ;
In the heating means, a plurality of heating heat transfer tubes extending in the axial direction are arranged in the circumferential direction on the inner peripheral portion of the rotating body on the one end side. A heat medium having a higher temperature than the object to be processed supplied to the inside of the rotating body is supplied,
A hollow-walled heating manifold protruding inwardly from the inner peripheral surface of the rotating body is provided at the boundary between the heating means on the one end side of the rotating body and the cooling means on the other end side of the rotating body. and
A heating means passing hole is formed inside the rotating body on the inner peripheral side of the heating manifold for allowing the object to be processed to pass from the one end side of the rotating body to the other end side,
A drying and cooling apparatus for an object to be processed, wherein a hollow portion of the heating manifold is open to communicate with the heating heat transfer pipe . a heat medium supply connecting pipe that supplies the heat medium to the heating means on the other end side of the boundary between the heating means on the one end side of the rotating body and the cooling means on the other end side; 8. The apparatus for drying and cooling an object to be processed according to claim 7, wherein the discharge connecting pipe for discharging the heat medium from the heating means extends along the outer peripheral portion of the rotating body. In the cooling means, a plurality of cooling heat transfer tubes extending in the axial direction are arranged in the circumferential direction on the inner peripheral portion of the other end side of the rotating body. 9. An apparatus for drying and cooling an object to be processed according to claim 7, wherein a coolant having a temperature lower than that of the heated and dried object to be processed is supplied. A hollow wall protruding from the inner peripheral surface of the rotating body toward the inner peripheral side from the boundary portion between the heating means on the one end side of the rotating body and the cooling means on the other end side is provided on the other end side of the rotating body. of cooling manifolds are provided,
A cooling means passing hole is formed inside the rotating body on the inner peripheral side of the cooling manifold for allowing the object to be processed to pass to the other end side of the rotating body,
10. The apparatus for drying and cooling an object to be processed according to claim 9, wherein a hollow portion of the cooling manifold is open in communication with the cooling heat transfer pipe. 8. A carrier gas supply port is provided on the other end side of the rotating body, and an exhaust port for the carrier gas is provided on the one end side of the rotating body. An apparatus for drying and cooling an object to be processed according to claim 10.

Images