JP3497980B2 - Heated rotary dryer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating type rotary dryer for heating and drying a material to be dried introduced into a drum while the drum rotates.

[0002]

2. Description of the Related Art As a heating type rotary dryer for heating and drying a material to be dried introduced into a drum while the drum rotates, for example, there is one disclosed in Japanese Utility Model Publication No. 7-20161. In this heating type rotary dryer, as shown in FIG. 5, a scraping plate 21 is fixed to an inner peripheral surface 20a of a drum 20 so as to extend toward the center of the drum 20. The scraping plate 21 exerts effects such as improving the drying efficiency by scraping and dropping the material to be dried by the rotation of the drum 20.

[0003]

By the way, the above-mentioned heating type rotary dryer is also used for drying the adhesive / adhesive material, such as a drying step at the time of recycling the pavement generating material. In particular, especially the drum 2 of the scraping plate 21
As shown by reference numeral 22 in FIG. 5, the material to be dried may adhere to both front and rear sides in the moving direction of the connection portion with 0. If the material to be dried remains as the deposit 22 in this way, the scratching efficiency is reduced and the rotational load of the drum 20 is increased. Therefore, the deposit must be regularly removed. However, there is a problem in that the work efficiency is lowered because the work of removing the adhered matter 22 takes a long time. Therefore, an object of the present invention is to suppress the adhesion of the material to be dried to the connection portion of the scraping plate with the drum, whereby the time for removing the adhered material can be shortened and the work efficiency can be improved. The object of the present invention is to provide a heating type rotary dryer that can be used.

[0004]

[Means for Solving the Agenda] The present invention has been made in view of the above points, and the heating type rotary dryer according to claim 1 scrapes the inner peripheral surface of a cylindrical drum at regular intervals. In a heating type rotary drier in which a plate is provided and the material to be dried introduced into the inside of the drum is heated and dried while the drum rotates, a main plate portion of the scraping plate is in a virtual plane including a central axis of the drum. And the end plate portion of the main plate portion on the drum center side is inclined in the drum rotation direction, and the end portion on the inner peripheral surface side of the drum of the main plate portion having the flat plate shape of the scraping plate is formed. Is located on the front side of the drum in the rotating direction as it is located on the drum connection side, and the front side inclined surface portion having a concave cross-section or an inclined flat surface is bent and integrated at the end of the flat plate-shaped scraping plate. And the inside of the drum in the direction opposite to the front sloped surface of the scraping plate. As the peripheral surface side is located closer to the drum connection side, the rear side inclined surface portion having a concave sectional shape and located in the rear side in the rotational direction of the drum is provided on the end portion of the above-mentioned scraping plate. It is characterized in that it is provided as a separate member from the plate and is joined to the scraping plate. in this way,
On the front side in the moving direction of the drum of rotation of the connection part of the scraping plate with the drum, a front inclined surface part is provided which is located closer to the front as it is closer to the drum connection side, and the rear side in the moving direction of the connection part during rotation of the drum. On the side, since the rear side inclined surface portion which is located on the rear side is located closer to the drum connection side, from the inner peripheral surface of the drum generated by the rotation of the drum to the scraping plate,
Alternatively, the movement of the material to be dried from the scraping plate to the inner peripheral surface of the drum is guided and smoothed by the front inclined surface portion or the rear inclined surface portion, and the material to be dried adheres to the connection portion of the scraping plate with the drum. It becomes difficult and the self-cleaning action of the material to be dried is enhanced. Further, since the front inclined surface portion is integrally formed on the scraping plate by bending the end portion of the scraping plate, it is necessary to provide separate members for forming the inclined surface portion on both sides of the scraping plate. Instead, only one side is needed.

Further, in the heating type rotary dryer according to claim 2 of the present invention, the front inclined surface portion and the rear inclined surface portion of the scraping plate are arranged so as to be symmetrical with respect to the main plate portion. Is characterized by. Also in this case, the same as the above, and since the front inclined surface portion is formed on the scraping plate by bending the end portion of the scraping plate, a separate member for forming the inclined surface portion is provided on the scraping plate. It is not necessary to provide it on both sides, only one side is required.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of the present invention.
~ It demonstrates below with reference to FIG. In addition, this 1st Embodiment is related with invention of Claim 1 and invention of Claim 2 in a claim. Figure 1
[Fig. 3] is a side sectional view of the heating rotary dryer 1 of this embodiment. The heating rotary dryer 1 has a cylindrical rotary tilt type drum 2. The drum 2 is arranged so as to slightly incline from the inlet 6 side to the outlet 7 side, and is rotationally driven by the rotational drive mechanism 4. A burner 5 for introducing hot air into the drum 2 is provided on the inlet 6 side, and a supply conveyor 9 for supplying the material 10 to be dried into the drum 2 is provided on the inlet 6 side. An exhaust port 8 for exhausting exhaust gas is provided on the outlet 7 side.

On the inner peripheral surface 2a of the drum 2, a plurality of stages of the scraping plates 3, which are spaced from the inlet 6 side toward the outlet 7 side.
3, ... are fixed. As shown in FIG. 2, the scraping plates 3, 3, ... Are also arranged at equal intervals in the circumferential direction of the drum 2 and extend in the center direction of the drum 2.

As shown in FIG. 3, the scraping plate 3 is formed by bending a single plate member, and has a flat plate-like main plate portion 1.
2, a tip plate portion 13 extending in a flat plate shape while extending from one side in the width direction of the main plate portion 12 to one side in the thickness direction on the front side in the rotation direction of the drum 2, and the main plate portion. Forming a substantially arcuate surface shape (a part of the outer peripheral surface of the cylinder obtained by cutting the cylinder with a cutting plane including the central axis) while inclining from the other side in the width direction of 12 to the same side as the tip plate portion 13 in the thickness direction And a base end plate portion 14 which extends in a vertical direction. The base end plate portion 14 is fixed to the inner peripheral surface 2a of the drum 2 by welding or bolting.

In this fixed state, the main plate portion 12 is arranged in a virtual plane including the central axis of the drum 2, and the tip plate portion 13 is located on the drum center side of the main plate portion 12 and on the central axis line of the drum 2. As they extend in parallel and are located closer to the center of the drum, they are inclined so as to be located on the front side in the moving direction when the drum rotates (the rotating direction of the drum 2 is indicated by an arrow X). Further, the base end plate portion 14 extends to the drum inner peripheral surface 2a side of the main plate portion 12 in parallel with the central axis of the drum 2 and is located closer to the drum inner peripheral surface 2a side, the further to the front side in the moving direction during drum rotation. The center axis of the curve is located on the front side in the moving direction by the rotation of the drum 2 and is arranged parallel to the center axis of the drum 2.

As a result, the scraping plate 3 is curved to form an inclined surface portion 14a on the base end plate portion 14 of the scraping plate 3, and this is the drum rotation of the connecting portion 15 of the scraping plate 3 to the drum 2. The front inclined surface portion is arranged on the front side in the moving direction of time. The front side inclined surface portion 14a is inclined so that it is located on the front side in the moving direction when the drum is rotated, and the main plate portion 12 of the scraping plate 3 and the drum 2 are connected to each other.

A base plate 16 is provided on the rear side in the moving direction of the base plate portion 14 of the scraping plate 3 when the drum rotates.
4 is arranged so as to have a mirror- symmetrical shape around the main plate portion 12 of the scraping plate 3 and is fixed to the drum 2 and the scraping plate 3 by welding or bolting.

As a result, the front sloped surface portion 14 described above
The inclined surface portion 16a of the base end plate 16 arranged in a mirror- symmetrical shape with respect to a and the main plate portion 12 is a rear side in the moving direction of the connecting portion 15 of the scraping plate 3 with the drum 2 when the drum rotates. It becomes the rear side inclined surface portion arranged in. The rear side inclined surface portion 16a is inclined so as to be located on the rear side in the moving direction when the drum is rotated, as it is located on the side connected to the drum 2.
Moreover, the main plate portion 12 of the scraping plate 3 and the drum 2 are connected.

In the first embodiment having the above construction, the drum 2 rotates as shown by an arrow X in FIG. 2, and the material to be dried 10 charged in the drum 2 is transferred to the scraping plates 3 and 3. While being scraped up and dropped by the burner 5, it is dried by the hot air introduced from the burner 5, but when the drum 15 of the connection part 15 of each of the scraping plates 3, 3 ,. On the front side in the moving direction, the front side inclined surface portion 14a located closer to the drum connecting side is provided, and on the rear side in the moving direction of the connecting portion 15 during drum rotation, the rear side is located closer to the drum connecting side. Rear inclined surface portion 16 located at
Since a is provided, the movement of the material to be dried 10 from the inner peripheral surface 2a of the drum 2 to the scraping plate 3 or from the scraping plate 3 to the inner peripheral surface 2a of the drum 2 due to the rotation of the drum 2,
As shown by the arrow Y in FIG. 2, the front slanted surface portion 14a or the rear slanted surface portion 16a guides and smoothes the surface of the scraper plate 3, and the material 15 to be dried hardly adheres to the connection portion 15 with the drum 2. The self-cleaning action of the dry material 10 is enhanced. Therefore, it is possible to suppress the adhesion of the material 10 to be dried to the connection portion 15 of the scraping plate 3 with the drum 2, so that the time for removing the adhered material can be shortened and the work efficiency can be improved. It is possible (the above is the effect according to the invention of claim 1 in the claims).

Moreover, since the front sloped surface portion 14a is formed on the scraper surface 3 by bending the scraping surface plate 3, a separate member for forming the front sloped surface portion 14a and the rear sloped surface portion 16a is formed. Need not be provided on both sides of the scraping plate 3, and it suffices to provide only the rear end inclined surface portion 16a on one side with the base end portion 16. Therefore, Ru it is possible to reduce the number of parts.

Next, a second embodiment of the present invention will be described below with reference to FIG. 4, focusing on differences from the first embodiment. The second embodiment also relates to the invention according to claim 1 and the invention according to claim 2 in the scope of claims. In the second embodiment, the front inclined surface portion 14a and the rear inclined surface portion 16a, which are provided in the front and rear of the connecting portion 15 of the scraping plate 3 with the drum 2 in the moving direction during drum rotation, are flat. . In particular,
As shown in FIG. 4, in the scraping plate 3 formed by bending from a single plate member, the base end plate portion 14 is formed from the other side in the width direction of the main plate portion 12 to the tip end plate portion 13 in the thickness direction. It has a flat plate shape and extends while inclining to the same side,
In the state of being fixed to the drum 2, the base end plate portion 14 extends on the drum inner peripheral surface 2a side of the main plate portion 12 so as to extend parallel to the central axis of the drum 2 and to the drum inner peripheral surface 2a side. It will be inclined so as to be located on the front side in the moving direction of time.

As a result, when the scraping plate 3 is bent, the flat inclined surface part 14a formed on the base end plate part 14 of the scraping plate 3 is connected to the drum 2 of the scraping plate 3. Part 15
The front inclined surface portion is arranged on the front side in the moving direction when the drum rotates. The front side inclined surface portion 14a is inclined so that it is located on the front side in the moving direction when the drum is rotated, and the main plate portion 12 of the scraping plate 3 and the drum 2 are connected to each other.

The base plate 16 disposed on the rear side in the moving direction of the base plate 14 of the scraping plate 3 when the drum rotates also has a flat plate shape that is mirror- symmetrical to the base plate 14. This allows
The flat inclined surface portion 16a of the base end plate 16 arranged in a mirror- symmetrical shape with the front side inclined surface portion 14a and the main plate portion 12 as the center is connected to the drum 2 of the scraping plate 3 by the connecting portion 15 thereof.
The rear inclined surface portion is arranged on the rear side in the moving direction when the drum rotates. The rear inclined surface portion 16a is inclined so that it is located on the rear side in the moving direction when the drum rotates as it is located on the connection side to the drum 2, and the main plate portion 12 of the scraping plate 3 and the drum 2 are connected. Let

Also in the second embodiment as described above,
The same effect as that of the first embodiment can be obtained.
In the first and second embodiments described above, the base end plate portion 14 of the scraping plate 3 is bent to the side opposite to the tip end plate portion 13 in the thickness direction, and the base end plate 16 is attached to the main plate portion 12. It may be arranged at a mirror surface symmetrical position with respect to the base end plate portion 14 with the center as the center.

[0019]

As described above in detail, according to the heating type rotary dryer of the first aspect of the present invention, the main plate portion of the conventional scraping plate is arranged radially in a flat plate shape with respect to the drum central axis. It is possible to improve what is installed, and the movement of the material to be dried from the inner peripheral surface of the drum to the scraping plate or from the scraping plate to the inner peripheral surface of the drum caused by the rotation of the drum is caused by the front inclined surface part or the rear side. It is guided by the inclined surface portion and becomes smooth, and it becomes difficult for the material to be dried to adhere to the connection portion of the scraping plate with the drum, and the self-cleaning action of the material to be dried is enhanced. Therefore,
Since it is possible to prevent the material to be dried from adhering to the connection portion of the scraping plate with the drum, it is possible to shorten the time for removing the adhered material and improve the work efficiency. Since the front inclined surface portion is formed on the scraping plate by bending the end portion of the scraping plate whose main plate portion is a flat plate, separate members for forming the inclined surface portions are provided on both sides of the scraping plate. Since it is not necessary to provide it, only one side is required, and the number of members can be reduced.

Further, according to the heating type rotary dryer of the second aspect of the present invention, the front sloped surface portion and the rear sloped surface portion can be formed symmetrically with respect to the main plate portion on the scraping plate. The effect can be obtained as described above.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a heating type rotary dryer according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a drum of the heating type rotary dryer according to the first embodiment of the present invention.

FIG. 3 is a partially enlarged cross-sectional view showing a scraping plate of the drum of the heating type rotary dryer according to the first embodiment of the present invention.

FIG. 4 is a partially enlarged cross-sectional view showing a scraping plate of a drum of a heating type rotary dryer according to a second embodiment of the present invention.

FIG. 5 is a partially enlarged cross-sectional view showing a scraping plate of a drum of a conventional heating type rotary dryer.

[Explanation of symbols]

1 heating type rotary dryer 2 drums 2a Inner surface 3 scraping board 14a Front sloped surface 15 Connection 16a Rear inclined surface portion

Claims (2)

(57) [Claims] 1. A heating type rotary dryer in which a scrubbing plate is provided on an inner peripheral surface of a cylindrical drum at regular intervals to heat and dry a material to be dried introduced into the drum while the drum is rotating. In the above, the main plate portion of the scraping plate is arranged as a flat plate shape in a virtual plane including the center axis of the drum, and the tip plate portion of the main plate portion on the drum center side is inclined in the drum rotation direction, The flat plate-shaped main plate is positioned so that the end on the inner peripheral surface side of the drum on the drum connection side is located on the front side in the rotational direction of the drum as the drum connection side is located, and the front surface is inclined with a concave cross section or a flat surface. The surface portion is provided integrally by bending the end portion of the flat plate-shaped scraping plate, and the inner peripheral surface side of the drum is located on the drum connection side in the direction opposite to the front inclined surface portion of the scraping plate. It is located on the rear side of the drum in the direction of rotation and has an arcuate surface with a concave cross section. Is a heating type rotary dryer characterized in that a rear inclined surface portion of an inclined flat surface is provided at the end of the scraping plate as a member different from the scraping plate and is joined to each scraping plate. Machine. 2. The heating type rotary dryer according to claim 1, wherein the front side inclined surface portion and the rear side inclined surface portion of the scraping plate are arranged so as to be symmetrical with respect to the main plate portion.