JP3306704B2 - Drying equipment and processing equipment for granular materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying apparatus and a processing apparatus for, for example, a granular material such as earth and sand coated with a water repellent having a water repellent property.

[0002]

2. Description of the Related Art Conventionally, a water-repellent soil having a property of not retaining water even when exposed to rainwater or the like has been known. Even if weed seeds adhere to such water-repellent soil, for example, no water is supplied to the seeds, so that no weeds grow. Therefore, it can be used as so-called grassless soil, for example, for laying in landscaping, graveyards, median strips on roads, and the like.

[0003] Water-repellent soil is obtained by coating a specific liquid composition on earth and sand and then heating and drying the earth and sand. The water-repellent soil obtained in this way is further cooled and finally packed in a bag and shipped as a product.

[0004]

Conventionally, various devices have been proposed for heating granular materials such as soil and stone. However, it takes a long time to completely dry the granular material coated with the liquid composition or the like by using these devices. Therefore, development of a drying apparatus capable of efficiently drying granules in a short time has been desired. In addition, depending on the composition of the coating or the type of the granular material, there is a thing that is not preferable to be heated by direct fire. There was a defect.

In the case of the above-mentioned water-repellent soil, it is cooled after drying, packed in a bag or the like capable of enclosing one ton of water-repellent soil, and shipped as a product. Conventionally, the granular material is left in a large space. It was common to cool. However,
With such a cooling method, the temperature of the granular material was not easily lowered. If the granular material that is not sufficiently cooled is placed on a conveyor such as a belt conveyor, the conveyor will be damaged. Further, since such a granular material cannot be packaged even when transported, a long time is required for cooling the granular material. Further, since a measuring instrument capable of measuring a heavy weight such as 1 ton is expensive, development of a measuring instrument capable of measuring a heavy weight at low cost has been desired.

The present invention has been made in view of the above-mentioned needs, and an object of the present invention is to provide an apparatus for drying granular materials having good drying performance. It is another object of the present invention to provide a granular material processing facility capable of efficiently drying, cooling, and packaging the granular material.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to provide a kiln having a granular material inlet on one side and a granular material outlet on the other side, and a heat source for heating the kiln. An apparatus for drying granular material, comprising: an injection device;
The entire run is covered by a housing wall, and the outer wall of the kiln is connected to the heat injection device on the inlet side from the outlet between the housing wall and the outer wall of the kiln and communicates with the outlet. Hot air passage is provided, hot air injected from the heat injection device reaches the outlet through the hot air passage, flows into the kiln, is exhausted from the inlet, and is discharged from the outlet. Kiln
The granular material carried out is carried out of the housing wall.
The housing wall is provided with an opening so that
The opening is usually closed, and a predetermined amount of granular material is stored on it.
An opening / closing plate that opens when the kiln is provided is further provided.A spiral blade is provided on an inner wall surface of the kiln, and the granular material is provided at intervals in a circumferential direction between the adjacent spiral blades, with rotation of the kiln. , And a stopper for dropping the granular material until the granular material reaches substantially the top of the kiln is provided.

Here, the shape of the kiln is not limited,
For example, when the kiln has a cylindrical shape, the hot air passage may be provided over the entire outer peripheral surface of the kiln, or may be provided over, for example, about a half circumference on the outer peripheral surface.

According to such a drying apparatus for granules, since the granules are not exposed to direct fire, there is no fear that the properties of the granules are deteriorated. In addition, since the outer wall of the kiln is heated by the hot air passing through the hot air passage, heat loss is suppressed, and the granular material is sufficiently heated even though the granular material is not lit.

Another object of the present invention is to provide a drying device for the above-mentioned granular material, a cooling device provided with a water tank into which the granular material taken out of the drying device is put, and a conveying device from the cooling device. A packaging unit comprising: a guide unit for guiding the obtained granular material to a packaging container; a base on which the packaging container is installed; and a weight measuring unit having a pressure sensor in a hydraulic circuit of a hydraulic cylinder supporting the base. And an apparatus for treating a granular material, characterized in that it has an apparatus.

[0011] According to such a facility for treating granules, since drying, cooling and packaging of the granules can be performed continuously, mass production of the granules becomes possible.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to FIGS. As shown in FIG. 1, the present embodiment is a water-repellent soil treatment facility 1 including a water-repellent soil drying device 10, a cooling device 40, and a packaging device 50. The water-repellent soil coated with the liquid composition is first put into the drying device 10. Next, the water-repellent soil
It is taken out of the drying device 10 and put into the cooling device 40. The water-repellent soil is conveyed from the cooling device 40 and put into the packaging device 50.

The drying apparatus 10 includes a cylindrical kiln 11, and the kiln 11 is installed on a roller 14 whose rotation is controlled by a motor 30. By rotating the roller 14, the kiln 11 can be rotated.
The roller 14 is supported by a fixed base 16. The upper side of the kiln 11 is also supported by the pressing roller 13. The hopper 12 is provided on the inlet 23 side (left side in the figure) of the kiln 11. The kiln 11 is entirely covered by a housing wall 18, and a hot air passage 12 is provided between an outer wall surface of the kiln 11 and the housing wall 18.
Are formed.

The housing wall 18 has openings at several places. An exhaust passage 15 is connected to an opening formed in the housing wall 18 on the inlet 23 side. Input port 23
A take-out passage 19 is connected to an opening formed in the housing wall 18 on the side of the take-out port 24 on the side opposite to the side. An opening / closing plate 29 rotatably attached to the housing wall 18 is provided at an opening to which the take-out passage 19 is connected. The opening / closing plate 29 is normally closed by the action of the weight 31, but is opened when a predetermined amount of water-repellent soil is accumulated on the opening / closing plate 29.

A burner 20 as a heat injection device is connected to an opening formed in the housing wall 18 near the central portion in the kiln longitudinal direction. As the burner 20, a kerosene burner or the like can be used.

A temperature sensor 25 for detecting the temperature of the hot air to be exhausted is attached to the exhaust passage 15, and a temperature sensor 26 for detecting the temperature of the heated water-repellent soil is attached to the extraction passage 19. According to the present embodiment, the coating of the water-repellent soil can be dried by heating the water-repellent soil in the kiln 11 kept at 150 ° C. for 15 minutes. Therefore, the outputs of the motor 30 and the burner 20 are controlled by control means (not shown) based on the outputs from the temperature sensors 25 and 26 so that such conditions are always satisfied.

FIG. 2 is a schematic plan view of the heating device 10. Here, illustration of the pressing roller 13 is omitted.
As shown in FIG. 2, spiral wings 21
Are formed. A stopper 22 is provided between adjacent spiral blades 21 at intervals in the circumferential direction. Therefore, when the kiln 11 rotates, the water-repellent soil G introduced into the kiln 11 from the hopper 12 repeats a motion of being lifted up and falling, and spirally moves inside the kiln 11.

Then, hot air is injected from the burner 20, and flows through the hot air passage 12 formed over the entire outer peripheral surface of the kiln 11 toward the outlet 23 in the right direction in the drawing. When the hot air reaches the outlet 23, it then flows into the kiln 11 from the outlet 23 and flows toward the inlet 23 to the left in the drawing. When the hot air reaches the inlet 23, it is exhausted to the outside through the exhaust passage 15 connected to the inlet. Since the partition wall 28 that shields the hot air passage 12 is provided on the side of the inlet 23 near the burner 20, the hot air injected from the burner 20 does not suddenly flow toward the inlet 23.

FIG. 3 is a sectional view taken along line BB in FIG. Here, the illustration of the housing wall 18 is omitted. As shown in FIG. 3, the stopper 22 provided on the inner wall surface of the kiln 11 projects in a direction inclined with respect to a direction toward the center C of the kiln 11. This is made taking into account that the angle of repose of the water-repellent soil G is about 30 °, and when the water-repellent soil G reaches the substantially top of the kiln 11, the stopper 22 and the horizontal direction are formed. 30 corner
° and the water-repellent soil G is designed to fall from the stopper 11.

FIG. 4A is an enlarged view of a portion A in FIG. FIG. 4B is a view taken in the direction of the arrow X in FIG. As shown in FIG. 4A, a rail 17 having a U-shaped cross section is provided on the outer peripheral surface of the kiln 11. Rail 17
It is supported by the roller portion 13a of the pressing roller 13. Further, the roller portion 13a is supported by the pressing portion 13b via the spring portion 27. A pressing force F is applied to the pressing portion 13b so as to press down the kiln 11 from above. As a result, the kiln 11 is driven by the roller 14 shown in FIG.
Can rotate without slipping on the roller 14. Further, the kiln 11 does not shift in the axial direction of the kiln.

The water-repellent soil drying apparatus 10 having the above-described structure.
According to the above, the hot air injected from the burner 20 reaches the outlet 24 through the hot air passage, flows into the kiln 11, and is repeatedly lifted and dropped by the spiral blades 21 and the stopper 22. The water repellent soil G is dried. Therefore, since there is no direct fire on the water repellent soil G, the luster of the surface of the water repellent soil is maintained.
Further, since the outer wall of the kiln 11 is heated by the hot air passing through the hot air passage 12, heat loss is suppressed, and the water-repellent soil G is sufficiently heated even though the water-repellent soil G is not directly heated.

Also, the stopper 22 provided on the inner wall surface of the kiln 11 falls such that the water-repellent soil G falls from the stopper 22 when the water-repellent soil G reaches a substantially top portion of the kiln 11.
It protrudes in a direction inclined with respect to the direction toward the center C of the kiln 11. Therefore, the falling time during which the strong hot air is directly applied to the water-repellent soil G is prolonged, and the water-repellent soil G is dried efficiently in a short time. The hot air that has flowed into the kiln 11 is stirred by the spiral blades 21 and the stoppers 22 to be in a turbulent state, so that the hot air is evenly distributed in the kiln 11. Therefore, the drying efficiency is further improved.

Further, since the water repellent soil G is transported by the spiral blade 21 and the stopper 22, there is no need to incline the kiln 11 for transporting the water repellent soil G. Therefore, the support of the kiln 11 is facilitated, and the mechanism of the pressing roller 13 and the roller 14 as the support mechanism is simplified.

Next, the cooling device 40 shown in FIG. 1 will be described. The cooling device 40 includes a water tank 41 filled with water, and the lower end of an inclined belt conveyor 42 is accommodated in the water tank 41. The water tank 41 has a belt 4
A fall prevention hopper 43 for preventing the water-repellent soil from falling from above 2a is provided.

The water repellent soil heated to about 150 ° C. is introduced into the water tank 41 from the discharge passage 19 of the drying device 10. Then, the water-repellent soil falls in the water, and the fall prevention hopper 4
3 and is placed on the belt 42a. Here, the water-repellent soil is first water-cooled. The belt conveyor 42 is operated at a low speed, and the water-repellent soil placed on the belt 42a is gradually conveyed upward. Then, the water-repellent soil is transported from the water to the air, and further transported upward. At this time, the water-repellent soil is air-cooled and dehydrated on the belt 42a.

The water repellent soil cooling device 40 having the above-described configuration
According to this, the water-repellent soil is first quenched by water cooling, so that the belt 42a is not damaged even if it is placed on the belt 42a of the belt conveyor 42. Therefore,
Since the water-repellent soil supplied from the drying device 10 can be continuously conveyed while being cooled by water cooling and air cooling, the productivity of the water-repellent soil can be improved.

Next, the packaging device 50 will be described. As shown in FIG. 1, the packaging device 50 includes a base 52,
One end (the left end in the figure) of 2 is rotatably supported by a support base 57. The other end (right end in the figure) of the base 52 is supported by a hydraulic cylinder 55 for weight measurement. The hydraulic cylinder 55 is connected to an accumulator 58 via a hydraulic circuit 53. Further, a pressure sensor 54 is connected to the hydraulic circuit 53, and an output of the pressure sensor 54 is supplied to hydraulic control means (not shown). The hydraulic circuit 53 is supplied with hydraulic pressure from a hydraulic supply source 60 via a check valve 59. Hydraulic cylinder 55, accumulator 58, pressure sensor 5
4 and a hydraulic circuit 53 connecting them together,
The weight measuring unit 56 is configured.

On the base 52, a packaging container setting table 61 is provided so as to be movable on the base 52. Here, a bag 80 capable of enclosing 1 ton of water-repellent soil is placed on the packaging container installation table 61. A hydraulic cylinder 62 for moving the packaging container is connected to the packaging container installation table 61. The hydraulic cylinder 62 is driven by operating a lever 64 of the installation table driving device 63, and has a predetermined amount (here, 1 ton). Is extruded into a transport path (not shown).

Above the bag 80, a guide portion 51 for guiding the water-repellent soil to the bag 80 is provided. The guide portion 51 is formed in a hopper shape, and is provided with a hydraulic cylinder 65 for opening and closing the guide portion for opening and closing the small diameter portion 51a. The hydraulic cylinder 65 is connected to a hydraulic supply source 60 via a switching valve 66 of the three boats.
The switching valve 66 is controlled by hydraulic control means (not shown). Further, a dehydrating unit composed of a fan and a cylindrical wire mesh is provided further above the guide unit 51.

The operation of the packaging device 50 will be described first.
The water-repellent soil conveyed by the belt conveyor 42 of the cooling device 40 passes through the cylindrical wire mesh 72 and is introduced into the guide portion 51. When passing through the wire mesh 72, the fan 7
Strong wind is applied to the water-repellent soil by 1 and the belt conveyor 42
The water that has not been completely dehydrated is blown off. The water-repellent soil introduced into the guide portion 51 falls into the bag 80 through the small diameter portion 51a.

As the water-repellent soil accumulates in the bag 80, the hydraulic cylinder for weight measurement is pushed down, and the pressure in the hydraulic circuit 53 increases. When the pressure sensor 54 detects a pressure corresponding to the weight of 1 ton of water-repellent soil, the pressure sensor 54 sends a signal to hydraulic control means (not shown). Based on this signal,
The hydraulic control means switches the switching valve 66 to drive the hydraulic cylinder 65 for opening and closing the guide portion, thereby blocking the fall of the water-repellent soil at the small diameter portion 51a.

Finally, the lever 64 of the installation table driving device 63
Is operated to drive the hydraulic cylinder 62 for moving the packaging container, and to move the packaging container installation table 61 to push out the bag 80 filled with 1 ton of water-repellent soil into a transport path (not shown).

In the packaging device 50 having the above-described configuration, the weight measuring section 56 includes the hydraulic cylinder 55 and the accumulator 5.
8, a pressure sensor 54, and a hydraulic circuit 53 connecting these to each other. When measuring a heavy weight such as one ton, accuracy is not so much required.
6, the requirement can be sufficiently satisfied.

The water-repellent soil treatment equipment 1 shown in FIG. 1 includes the drying device 10, the cooling device 40, and the packaging device as described above, so that the drying, cooling, and packaging of the water-repellent soil are performed continuously. And efficiently.

[0035]

As described above, the granule drying apparatus according to the present invention is connected to the heat injection device on the outer wall surface of the kiln on the side of the discharge port from the discharge port and communicates with the discharge port. A hot air passage is provided, and hot air injected from the heat injection passage reaches the outlet through the hot air passage, flows into the kiln, and is exhausted from the inlet. Therefore, since there is no direct fire to the granules, there is no fear that the properties of the granules are deteriorated. In addition, since the outer wall of the kiln is heated by the hot air passing through the hot air passage, heat loss is suppressed, and the granular material is sufficiently heated even though the granular material is not lit.

Further, the equipment for treating granular material according to the present invention comprises:
A drying device for the granular material, a cooling device including a water tank into which the granular material taken out from the drying device is charged, a guide unit for guiding the granular material conveyed from the cooling device to a packaging container, and a packaging container are installed. And a packaging device having a weight measuring unit having a pressure sensor in a hydraulic circuit of a hydraulic cylinder supporting the base. According to such a granular material processing equipment, since drying, cooling, and packaging of the granular material can be performed continuously, mass production of the granular material becomes possible.

[Brief description of the drawings]

FIG. 1 is a schematic overall view showing an embodiment of the present invention.

FIG. 2 is a schematic plan view of the drying device in FIG.

FIG. 3 is a sectional view taken along line BB in FIG. 2;

FIG. 4 is an enlarged view of a portion A in FIG.

[Explanation of symbols]

 Reference Signs List 1 processing equipment (granular material processing equipment) 10 drying device (granular material drying device) 11 kiln 12 hot air passage 13 pressing roller 14 roller 15 exhaust passage 18 housing wall 19 extraction passage 20 burner (heat injection device) 21 spiral blade 22 Stopper 23 Input port 24 Extraction port 25, 26 Temperature sensor 30 Motor 40 Cooling device 41 Water tank 42 Belt conveyor 43 Fall prevention hopper 50 Packaging device 51 Guide part 52 Base 53 Hydraulic circuit 54 Pressure sensor 55 Pressure measurement cylinder 55 Cylinder) 56 Weight measuring section 58 Compressor 60 Hydraulic supply 80 Bag

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Taneo Shinohara 410 Togamicho, Utsunomiya-shi, Tochigi (56) References JP-A-6-226242 (JP, A) JP-A-62-87719 (JP, A) JP-A-51-95662 (JP, A) JP-A-6-107301 (JP, A) JP-A-10-53216 (JP, A) JP-A-58-179794 (JP, A) JP-A-9-304167 (JP, A) JP, A) JP-A-8-198598 (JP, A) JP-A-5-8391 (JP, U) JP-A 64-52539 (JP, U) JP-A 55-26240 (JP, U) (58) ) Surveyed field (Int.Cl. ⁷ , DB name) F26B 17/20

Claims (2)

(57) [Claims] 1. A kiln (11) having an inlet (23) for granular material on one side and an outlet (24) for granular material on the other side, and a heat injection device for heating the kiln (11). 20)
And the kiln (11) is entirely formed by the housing wall (18).
Ri covered with the Howe on the outer wall surface of the kiln (11)
A hot-air passage (12) connected to the heat injection device (20) on the side of the inlet (23) from the outlet (24) and communicating with the outlet between the jing wall (18);
Is provided, hot air injected from the heat injection device reaches the outlet through the hot air passage, flows into the kiln, is exhausted from the inlet, and is discharged from the outlet (24). Taken out of the kiln
Granules can be carried out of the housing wall (18)
An opening is provided in the housing wall,
Is usually closed and a certain amount of granular material has accumulated on it
An opening / closing plate (29) is provided to open the kiln, and a spiral wing (21) is provided on the inner wall surface of the kiln (11). And a stopper (22) for lifting the granular material with the rotation of the granular material and dropping the granular material until the granular material reaches the approximate top of the kiln. (1
0). 2. A drying apparatus for a granular material according to claim 1, a cooling device (40) including a water tank (41) into which the granular material taken out of the drying device is charged, and a transport from the cooling device. Packaging container (80)
(51), a base (52) on which the packaging container is installed, and a pressure sensor (54) in a hydraulic circuit (53) of a hydraulic cylinder (55) supporting the base. A packaging device (50) provided with a weight measuring unit (56)
(1) A processing facility for granular materials, comprising: