JPS592834B2 - Rotating cylindrical dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in the crushing and exhaust performance of a rotating cylindrical drying device equipped with a stirring bar.

Conventionally, rotary cylindrical drying equipment is equipped with an exhaust fan separate from the main unit to exhaust air, but when using the drying equipment for outdoor work such as soil improvement in dam construction, it is not always necessary to connect the main unit and the exhaust fan. The problem is that this cannot be done easily.

Some dryers include an axial fan in a rotating heating cylinder along with a stirring rod, but this tends to introduce raw material particles larger than dust into the exhaust air.

An object of the present invention is to incorporate an exhaust fan into the main body of a drying apparatus to prevent large raw material particles from being mixed into the exhaust gas, thereby facilitating use in outdoor work sites and the like.

In order to achieve the above object, the gist of the present invention is as follows:
A centrifugal fan is provided at the exhaust side end of the stirring rod rotating shaft that passes through the drying device itself, and a plate is provided at the suction port of the centrifugal fan to prevent large raw material particles from being sucked in.

The rotor of the centrifugal fan is fixed to the stirring rod rotation shaft and rotated together with the rotation shaft, or a hollow shaft is attached to the outside of the rotation shaft via a bearing, and the rotor is fixed to the hollow shaft.The rotation speed of the stirring rod Rotate the centrifugal fan at a different speed.

It is desirable to attach a plate to the lower half of the inlet of the centrifugal fan to form an airflow from the upper half of the exhaust pipe to the inlet, thereby preventing large raw material particles from being sucked into the fan.

The apparatus of the present invention will be explained based on embodiments shown in the drawings.

As shown in FIGS. 1 and 2, a main body 2 of the drying device is attached to a base frame 1 installed on the floor.

The main body 2 has a supply tube 3 and an exhaust tube 4 at both ends, and a heating tube 5 is rotatably provided in the middle.

The heating cylinder 5 is supported by a rolling band 7 on a roller 6 on the frame 1 so as to be able to roll freely, and is rotated by being rotationally driven by a drive device (not shown) from a gear band 8.

A plurality of wiper plates 13 extending in the axial direction are provided within the heating cylinder 5 .

A raw material input device 9 and a heating device 10 are opened into the supply cylinder 3, respectively.

A rotating shaft 11 passing through the center of the main body 2 is provided, the rotating shaft 11 is supported by bearings at both ends of the main body 2, and a pulley 12 is provided at one end of the rotating shaft 11 to rotate at a predetermined speed.

The rotating shaft 11 is provided with a large number of stirring rods 14 that extend radially inside the heating cylinder 5 .

The stirring rods 14 are usually arranged in a spiral shape in a single or double row in the axial direction.

Note that the configuration described so far is almost the same as the conventional one.

A casing 16 of a centrifugal fan 15 is attached to the exhaust pipe 4,
A fan 15 is fixed to the rotating shaft 11.

The exhaust port 17 of the centrifugal fan 15 is connected to the cyclone separator 1
Connect to 8.

One conveyor 19 is disposed under each of the exhaust ports of the exhaust pipe 4 and the separator 18, and conveys the discharged processing raw material to a predetermined location.

As shown in FIG. 3, the lower half of the inlet 20 of the centrifugal fan has a center angle 120 whose center is shifted in the direction of rotation of the heating cylinder 5.
It is covered by a sector plate 21 of between 160° and 160°.

Next, the drying process of the apparatus of the present invention will be explained based on the same example.

The heating device 1 heats the inside while rotating the heating cylinder 5 and the rotating shaft 11.
0, and the raw material is introduced into the interior through the raw material input device 9.

The input raw materials are swept up by a wiper plate 13, subjected to a heating, drying and crushing process while being stirred by a stirring rod 14, and sequentially sent to the exhaust stack 4.

The raw material to be treated that has entered the exhaust pipe 4 is discharged onto the conveyor 19 from the lower discharge port.

On the other hand, since the fan 15 rotates together with the rotating shaft 11, the dust in the exhaust pipe 4 is sucked together with gas through the fan intake port 20 and enters the cyclone separator 18 through the exhaust port 1γ.

There, the dust and gas are separated, and the dust is separated by the separator 18.
is discharged onto the conveyor 19 from the lower discharge port.

At the rear end of the heating cylinder 5, the raw material is concentrated at a position shifted from the center of the bottom in the rotation direction.

Since the lower half of the fan suction port 20 near the point where the raw material is concentrated is covered with a fan-shaped plate 21, particles larger than the dust in the raw material are sucked into the fan 15 by the suction action of the fan 15. It's almost impossible to get caught.

Therefore, damage to the fan 15 and the cyclone separator 18 due to suction of relatively large raw material particles is prevented.

As shown in FIG. 4, instead of directly covering the lower half of the suction port 20, a plate 22 shaped like a bag may be provided to cover the lower half of the suction port 20.

As a result, gas and dust are sucked into the fan 15 only from the upper part of the exhaust pipe 4, so that the gas and dust are sucked into the exhaust pipe 4 from the rear end of the heating pipe 5.
The raw material particles fed into the fan are prevented from being sucked into the fan together with dust.

If the fan 15 rotates at the same rotation speed as the rotating shaft 11 and its capacity is insufficient, attach a hollow shaft 23 to the rotating shaft 11 via a bearing 25 as shown in FIG. Fix the fan rotor 15.

A pulley 24 is attached to the hollow shaft 23, and although not shown, the rotational drive of the motor is transmitted to the hollow shaft 23 via a belt, and the fan 15 is rotated at a speed different from that of the rotating shaft 11.

In this case, it is desirable that the rotating shaft 11 be supported between the pulley 24 and the pulley 12.

Alternatively, a bifurcated pulley may be attached to the motor that drives the rotating shaft 11 to rotate the pulley 12 and the pulley 24 simultaneously.

As shown in FIG. 6, wiper plates 13' are arranged at intervals in the axial direction within the heating cylinder 5, and the length is such that the rotating shaft 11 at the spaced portion reaches the bottom of the heating cylinder 5. A stirring rod 14' is attached so as to be accessible to the front and rear edges of the wiper plate 13'.

The raw material is sufficiently crushed into finer particles by being subjected to the crushing action between the wiper plate 13' and the stirring rod 14' in both the radial and axial directions within the heating cylinder, thereby increasing the drying efficiency.

As mentioned earlier, particles larger than dust are prevented from being drawn into the fan, so even if the particles become finer, no trouble will occur.

As mentioned above, since the device of the present invention has an exhaust fan built into the main body, there is no need for special construction for exhaust treatment, and just by installing it at an outdoor work site, you can immediately begin drying work such as soil improvement. It can be performed.

Prevents suction of processing raw material particles larger than dust.

Since the plate is provided at the intake port of the fan, troubles caused by providing an exhaust fan inside the main body can be prevented.

[Brief explanation of the drawing]

1 and 2 are a front view and a side view schematically showing a device according to an embodiment of the present invention with a portion cut away, FIG. 3 is a diagram showing the intake port of the exhaust fan in FIG. 1, and FIG. 6 through 6 are sectional views showing essential parts of other embodiments. 2... Device main body, 3... Supply tube, 4... Exhaust tube,
5... Rotating heating cylinder, 11... Stirring rod rotating shaft, 1
3゜13'...Blanking plate, 14.14'...Stirring bar, 15...Centrifugal fan, 16...Same casing, 11...Same exhaust port, 18...Cyclone separator, 20 ...Centrifugal fan inlet, 21.22...Plate, 23...Hollow shaft, 24...Opening pulley, 2
5...Bearing.

Claims (1)

[Claims] 1. A main body is formed from a supply cylinder and an exhaust pipe provided on both sides, and a heating cylinder rotatably provided in the center, and a stirring rod passing through the main body in the axial direction is attached to the outside of the main body. A plurality of stirring rods extending in the radial direction are fixed to the rotation shaft of the stirring rod in the heating cylinder, a wiper plate is attached to the inner circumferential surface of the heating cylinder, and a centrifuge is mounted in the exhaust cylinder. A casing of a fan is attached, and a rotor of the centrifugal fan is provided on the rotating shaft of the stirring rod passing through the casing of the centrifugal fan to form a centrifugal fan, thereby preventing particles larger than dust from being sucked into the suction port of the centrifugal fan. A rotary cylindrical drying device characterized in that a plate is provided, and an exhaust port of the centrifugal fan is connected to a dust separator. 2 Center angle 12 with the axis at the apex at the inlet of the centrifugal fan
2. The rotary cylindrical drying device according to claim 1, wherein the fan-shaped plates numbered 00 to 1600 are mounted with their centers shifted in the direction of rotation of the heating cylinder. 3. The rotating cylindrical drying device according to claim 1, further comprising a plate shaped like a bag to cover the lower half of the inlet of the centrifugal fan. 4 Wiring plates are disposed at intervals in the axial direction in the heating cylinder, and a stirring rod of a length approaching the bottom of the heating cylinder is attached to the heating cylinder in the space between the cleaning plates. The rotating cylindrical drying device according to any one of claims 1 to 3, characterized in that the drying device is provided on the rotating shaft of the stirring rod so as to be accessible in the direction. 5. Supply cylinders provided on both sides. A main body is formed from an exhaust pipe and a heating cylinder rotatably provided in the center, a stirring rod passing through the main body in the axial direction is rotatably supported on the outside of the main body, and the heating cylinder inside the heating cylinder is rotatably supported. A plurality of stirring rods extending in the radial direction are fixed to the stirring rod rotating shaft, a wiper plate is attached to the inner circumferential surface of the heating cylinder, a casing of a centrifugal fan is attached to the front air exhaust cylinder, and the casing of the centrifugal fan A centrifugal fan is formed by providing a rotor of a centrifugal fan on the rotating shaft of the stirring rod passing through the centrifugal fan, a plate for preventing suction of particles larger than dust is provided at the suction port of the centrifugal fan, and an exhaust port of the centrifugal fan is provided with a plate for preventing suction of particles larger than dust. connected to a separator, fixing the rotor of the centrifugal fan to a hollow shaft, and attaching the hollow shaft to a stirring rod rotating shaft so as to be relatively rotatable;
A rotation characterized in that a part of the hollow shaft projects outward and a pulley is fixed to the part, and the rotor of the centrifugal fan can be rotated through the pulley at a speed different from that of the stirring rod rotating shaft. Cylindrical drying device. 6 Center angle 12 with the axis at the apex at the inlet of the centrifugal fan
6. The rotary cylindrical drying device according to claim 5, characterized in that the fan-shaped plate of 0° to 160° is attached with its center shifted in the rotational direction of the heating cylinder. 7. The rotating cylindrical drying device according to claim 5, further comprising a plate shaped like a bag to cover the lower half of the inlet of the centrifugal fan. 8 Wiring plates are disposed at intervals in the axial direction in the heating cylinder, and a stirring rod of a length approaching the bottom of the heating cylinder is moved axially close to the said wiper plate in the spaced part of the said wiper plate. The rotating cylindrical drying device according to any one of claims 5 to 7, characterized in that the drying device is preferably provided on a rotating shaft of a stirring rod.