JP2003083677A - Rotary dryer with cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary dryer with cooler that can successively perform drying operating and cooling operation in an integrally provided rotary drum. SOLUTION: The inside of the horizontal rotary drum which is slightly inclined so that a raw material thrown in the drum from its inlet side may be fed to its discharge side is divided into an inlet-side drying chamber to which hot air is introduced and an outlet-side cooling chamber to which cold air is introduced by providing an intermediate wall which is fixed independently from the rotation of the drum. In addition, in the lower end section of the intermediate wall, a notched port which is blocked by the moving raw material and, at the same time, makes the material pass through the port to the cooling chamber is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary dryer for charging raw materials such as granular materials, powder materials, and solid fluid materials into a rotary drum having a horizontal axis for drying. Specifically, the present invention relates to a rotary dryer device with a cooler that also cools after drying.

[0002]

2. Description of the Related Art A rotary dryer is one in which a raw material is charged from one end into a rotary drum having a slightly inclined horizontal axis, and is fed to the other end by rotation while drying it. Blow-in or heating means of the rotating drum itself is used. The product heated by drying is discharged from the other end of the rotary drum, but if it is still heated, it may deteriorate, so that it is immediately put on a cooler (cooling device) to prevent it.

The cooler may be of a horizontal axis rotary drum type in which cold air is blown, or of a tunnel type in which it is cooled while being conveyed by a belt conveyor. Conventionally, a rotary dryer and a cooler are separated, and various conveyers or human power are used for transportation between them.

[0004]

In any case, in the conventional rotary dryer, it is necessary to separately cool with a cooler at a distant place, so that a large installation area is taken by the equipment of separate devices. Not only will this cause an excessive capital investment, it will not be easy to maintain and
There were inconveniences such as leakage of raw materials between the devices.

The present invention has been made in view of the above circumstances.
An object of the present invention is to provide a rotary dryer device with a cooler that can perform drying and subsequent cooling in an integrated rotary drum.

[0006]

In order to achieve the above-mentioned object, the present invention is directed to a rotary drum having a horizontal shaft which is slightly inclined so that the raw material charged from the inlet side is discharged to the discharge side.
By providing an intermediate wall that is independently fixed to the rotation, the inlet side is defined as a drying chamber into which hot air is introduced, and the discharge side is configured as a cooling chamber into which cold air is introduced. A rotary drier device with a cooler is provided, which is provided with a notch at the lower end portion of which is blocked by the moving raw material and passes through to the cooling chamber.

[0007]

[Operation] According to the above configuration, the raw material supplied by the raw material feeding chute moves to the discharge side while repeating the reversal so that the inner peripheral surface in the rotational direction is turned upside down by the rotation of the rotary drum, and It is dried by receiving hot air in the drying chamber up to the intermediate wall in the middle, and is cooled by receiving cool air when it passes through the notch in the intermediate wall and reaches the cooling chamber. Become. In the rotary drum, since the cutout of the intermediate wall is blocked by the moving material, the movement of hot air and cold air is blocked between the drying chamber and the cooling chamber.

When the intermediate wall is attached to the cold air passage (claim 2), the cold air passage is also used for supporting the intermediate wall, and the structure is simplified. Further, when the intermediate weir is provided (Claim 3), the function of closing is ensured, and even if the supply of the raw material may be interrupted, the cutout is caused by the retention of the raw material between the intermediate wall and the intermediate weir. The sealed state is maintained.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, since the intermediate wall 11 has a function of blocking air, the rotary drum 1
There is a slight gap between the and. Also, the rotating drum 1
The rotation of the raw material a causes the raw material a to move back up to the peripheral wall on one side thereof.
Is provided. The manner in which the raw material a rises on the intermediate wall 11 differs depending on the conditions, but it is easy to deal with the shape of the crescent-shaped cutout 25 as in the embodiment.

The form of introduction of hot air and cold air is not particularly limited, but if a pipe is used for introduction, it is suitable for supporting the intermediate wall 11 in the case of the cold air passage 5. When the hot air passage 3 is a pipe, its tip may be used as a hot air outlet or an outlet may be opened in the outer periphery.

[0011]

As described above, according to the rotary dryer apparatus with a cooler of the present invention, the intermediate chamber is provided in the integral rotary drum to form the drying chamber and the cooling chamber, and Since the intermediate wall is provided with a cutout that is blocked by the moving raw material and at the same time allows the passage of the raw material, the input raw material is surely cooled after drying, and the raw material is cooled at the time of discharge. Therefore, in a compact structure that has both drying and cooling, the installation area and capital investment do not become excessive, maintenance is easy and the cost is low, and there is no leakage between drying and cooling. It has an excellent effect in economically and efficiently performing the appropriate drying treatment of.

[0012]

Embodiments of the present invention will now be described with reference to the drawings.

The drawings show an embodiment, in which a rotary dryer with a cooler has a tubular hot air passage 3 from the inlet side, and a tubular cold air passage 5 from the discharge side as opposed to the center of the rotary drum 1. And is fixed to them by penetrating the inlet hood 7 and the outlet hood 9. Reference numeral 10 is an outlet for cold air. An intermediate wall 11 is fixed to the tip of the cold air passage 5, and an intermediate weir 13 is provided on the inner peripheral surface of the rotary drum 1 at a retracted position from the intermediate wall 11. Therefore, with the intermediate wall 11 as a boundary, the inlet side is the drying chamber 14, and the outlet side is the cooling chamber 1.
It is 5. Reference numeral 16 is a raw material charging chute, 18 is a hot air generating furnace, and 20 is a cooling fan.

The rotary drum 1 has a cylindrical shape with both ends open, but the openings are closed by an inlet hood 7 and an outlet hood 9, hot air is discharged from the inlet hood 7, and cooling air and product are discharged from the outlet hood 9. Are to be discharged. 22
Is a hot air exhaust fan, and 24 is a cold air exhaust fan. Regarding the rotational drive of the rotary drum 1, the tires 17,
17, the girth gear 26 is fitted between them, the tires 17, 17 are supported by the receiving rollers 19, 19, and the pinion gear 21 meshing with the girth gear 26 is driven by the motor 23 with a reduction gear. The rotary drum 1 is supported with a slight inclination in that direction so that the raw material can easily flow from the inlet side to the outlet side.

Therefore, the raw material a introduced into the rotary drum 1 from the raw material introducing chute 16 is sequentially delivered in an inclined direction by the rotation, and is uniformly kneaded so as to be fanned, uniformly receives hot air, and is dried to a desired value. Upon completion, the intermediate wall 11 is reached. The state of this movement is as shown in FIG.
It is unevenly distributed on the rotary drum 1 so as to go up the inner periphery on one side in the rotation direction P.

As shown in FIG. 2, the intermediate wall 11 has a circular shape which fits in the inner circumference of the rotary drum 1 with a slight clearance, but a crescent-shaped notch at a position on one side in the rotation direction P in the lower half. Since 25 is provided, the raw material a that has reached the intermediate wall 11 just closes the notch 25 due to uneven distribution and at the same time passes through it. Therefore, hot air in the drying chamber 14 hardly leaks to the cooling chamber 15, and conversely, cool air in the cooling chamber 15 does not leak to the drying chamber 14.

As shown in FIG. 3, the intermediate weir 13 is annularly projected on the inner circumference of the rotary drum 1, and the inner circumference circle has a cutout 2.
The height was set so as to circumscribe the straight rim of No. 5. Further, the intermediate wall 11 is spaced from the intermediate wall 11 so that the movement of the raw material a is not hindered. In this way, the raw material a passing through the cutout 25 gets over the intermediate weir 13 to cause a traffic jam, and the cutout 25 is blocked more reliably by suppressing the passage.

[0018]

[Brief description of drawings]

FIG. 1 is an explanatory sectional view showing a rotary dryer device with a cooler of the present invention.

FIG. 2 is an enlarged cross-sectional view of the rotary drum at the position of the intermediate wall.

FIG. 3 is an enlarged cross-sectional view of the rotary drum at the position of the intermediate dam.

FIG. 4 is an enlarged cross-sectional view of a rotary drum showing a state in which a raw material closes a cutout in front of an intermediate wall.

[Explanation of symbols]

1 rotating drum 3 hot air path 5 cold wind path 7 entrance hood 9 Exit Hood 11 Middle wall 13 Intermediate weir 14 Drying room 15 Cooling room 16 Raw material chute 25 notch a raw material

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Claims (3)

[Claims] 1. A boundary is provided by providing an intermediate wall which is independently fixed to the rotation on a rotary drum of a horizontal axis slightly inclined so that the raw material fed from the inlet side is sent to the discharge side. The inlet side is configured as a drying chamber where hot air is introduced, and the discharge side is configured as a cooling chamber where cold air is introduced,
A rotary dryer device with a cooler, which is provided with a cutout at the lower end of the intermediate wall, the cutout being blocked by the moving material and passing through to the cooling chamber. 2. A hot air passage is provided from an inlet side for introducing hot air, and a cold air passage is provided from a discharge side to introduce cold air into a rotary drum. The cold air passage is formed in a tubular shape and an intermediate wall is provided at a tip thereof. In addition, the inlet side of the rotating drum is provided with an inlet hood for closing the inlet to discharge hot air, and the outlet side is closed for discharging cold air, while the dried and cooled raw material is attached. The rotary dryer device with a cooler according to claim 1, wherein an outlet hood for discharging the air is provided. 3. An annular intermediate weir through which the raw material rides is projected on the inner peripheral surface of the rotating drum so as to serve as a restraint for the raw material to pass through the cutout portion at a position closer to the discharge than the intermediate wall. The rotary dryer device with a cooler according to 1 or 2.