JPH06288675A - Grain drying device in grain storage bin - Google Patents

Abstract

PURPOSE:To make it possible to all over and homogeneously dry grains accumulated and stored in a grain storage bin. CONSTITUTION:The lower part of a grain storage bin 1 is divided in an upper part and a lower part with a ventilation wall 2, thereby forming a grain accumulation and storage chamber 3 in the upper art and a ventilation chamber 4 in the lower part respectively. A suction fan 5 is connected to the ventilation chamber 4 while an air duct 6, which leads to an open air, is installed to an upper space of the grain accumulation and storage chamber 3. A suction air is designed to be distributed at the lower part ventilation chamber 4 by way of an accumulated grain layer from the upper space of the grain accumulation an storage chamber 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain drying device in a grain storage bottle for ventilating and drying grains stored in a grain storage bottle to a predetermined water content.

[0002]

2. Description of the Related Art Generally, grains, especially rice and wheat, are stored under certain conditions after being dried to a water content that is unlikely to deteriorate. Conventionally, dry air is pumped upward through a piled grain layer while circulating and flowing the grain loaded in the grain tank by a loading conveyor, a vertical auger, a grain transport device and a grain lifting machine. As a grain drying device which is dried by ventilation, a device described in Japanese Patent Publication No. 63-40579 is known.

[0003]

As described in the above publication, in the conventional grain drying apparatus of this type,
The grain accumulated in the grain tank is dried while being stirred by the mixing and stirring device that rotates and moves in the grain tank.The mixing and stirring device contacts the lower ventilation wall when moving inside the grain container. In order to avoid this, the lower end of the mixing and stirring device is maintained at a certain height above the ventilation wall, and a layer in which the accumulated grains are not stirred is formed on the ventilation wall. It has been pointed out that the un-stirred accumulated grain layer remains in a stationary state and is directly exposed to the drying air blown under pressure, so that it is overdried.

In view of the problems in the conventional grain drying apparatus of this type, the present invention has the advantage that even if a stationary grain sedimentation layer is formed in the lower portion of the grain accumulation storage chamber in the grain storage bin, that portion is still present. An object of the present invention is to provide a grain drying device in a grain storage bottle that can be uniformly dried over the entire surface without overdrying.

[0005]

In order to achieve the above object, a grain drying device for a grain storage bin according to the present invention comprises a grain storage bin having a lower portion partitioned by a ventilation wall into upper and lower portions and a grain accumulation storage chamber provided in the upper portion. , A ventilation chamber is formed in the lower part, and a suction fan that sucks and discharges the air in the ventilation chamber is connected to the ventilation chamber, and an air guide passage leading to the outside air is provided in the upper space of the grain accumulation storage chamber. The suction air is circulated from the upper space of the grain accumulation storage chamber through the accumulated grain layer toward the lower ventilation chamber, and the grains accumulated in the grain accumulation storage chamber are ventilated and dried.

In the grain drying apparatus for grain storage bins according to the present invention, the lower portion of the grain storage bin is divided into upper and lower parts by a ventilation wall to form a grain accumulation storage chamber in the upper part and a ventilation chamber in the lower part. A compression fan is connected to the upper space of the sediment storage chamber through an air passage, and the lower ventilation chamber is provided with an exhaust port to the outside air so that the upper space of the grain accumulation storage chamber passes through the accumulated grain layer to the lower ventilation chamber. It is configured such that compressed air is circulated toward the air to dry the grains accumulated in the grain accumulation storage chamber.

Further, the grain drying device in the grain storage bottle according to the present invention has the above-mentioned structure, in which suction air for circulating suction air from the upper space of the grain accumulation storage chamber through the accumulated grain layer toward the lower ventilation chamber or It is equipped with a heating device for heating the compressed air.

[0008]

According to the grain drying apparatus in the grain storage bin according to the present invention, suction air or compressed air is circulated from the upper space of the grain accumulation storage chamber through the accumulated grain layer toward the lower ventilation chamber, and the grain accumulation storage is performed. Grains accumulated indoors are ventilated and dried. The suction air or the compressed air is the outside air, but when the outside air temperature is high, the outside air is used as it is as the dry air. When the outside air temperature is low, the heating storage is operated to heat the outside air sucked or pumped to the upper space of the grain accumulation storage chamber. In the grain layer accumulated in the grain accumulation storage chamber, suction air or forced air that flows downward from the upper space of the grain accumulation storage chamber to the lower ventilation chamber flows, so the static portion and mixed agitation occur in the accumulated grain layer. Even if there is unevenness, the ventilation is always uniform, no overdried parts occur, and the entire surface is dried uniformly. The operation control of the heating device is preferably performed automatically by detecting the outside air temperature and the dry air temperature.

When the grains in the grain accumulating and storing chamber have been dried to a predetermined water content, they are stored in the grain storage bottle as they are. In this case, outside air can be slowly circulated in the accumulated grain layer in the grain accumulation storage chamber by downward suction air or downward pressure blow air, and can be stored for a long period of time without impairing quality.

[0010]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 shows a first embodiment of a grain drying device in a grain storage bottle according to the present invention. 1 is a grain storage bottle, and this grain storage bottle 1 is of a substantially closed type, and is divided into upper and lower parts by a ventilation wall 2 at a lower portion, an upper portion serves as a grain accumulation storage chamber 3, and a lower portion serves as a ventilation chamber 4. There is. Ventilation chamber 4
A suction fan 5 is connected to. Further, an air guide path 6 extending downward is connected to the upper space of the grain accumulation storage chamber 3, the lower end of which is connected to a heating device 7 (for example, a liquid fuel burner), and the heating device 7 is connected to the outside air. It is open. The suction fan 5 communicates with the outside air through an exhaust port 8. A mixing and stirring device 9 is provided in the grain accumulation storage chamber 3,
This mixing and stirring device 9 is composed of a plurality of vertical spiral rotating bodies,
It moves in the grain accumulation storage chamber 3 and mixes and agitates the accumulated grains. 10 is a grain transfer conveyor and 11 is a grain discharge conveyor. 12 is a grain input port, and 13 is a leveling device for evenly dispersing grains. In addition, the outer periphery of the grain storage bin 1 can be made into a heat insulating structure by a heat insulating wall.

In the device constructed as described above, when the suction fan 5 is operated, the outside air is sucked and introduced into the upper space of the grain accumulation storage chamber 3 from the opening of the heating device 7 through the air guide passage 6, and the grain accumulation is performed. It flows downward in the layer 14 and is discharged from the lower ventilation chamber 2 through the suction fan 5. Therefore, the accumulated grain layer 14 is ventilated and dried by the suction air that flows downward from above. However, since this suction air flows while pressing the grain accumulation layer from above to below, the accumulated grain remains in a static state. It is kept stable, the suction air is evenly distributed throughout, and uniform drying is performed. Then, since the suction air is discharged downward from the lower ventilation chamber 2 by the suction fan 5, the suction fan 5 is located at the lowermost part of the grain storage bin 1, and the air discharged from the suction fan 5 is discharged. Even if a large amount of dust is contained in the grain layer, the dust can be intensively treated without rising to the air. In addition,
When the outside air temperature is low, the heating device 7 is operated to heat the sucked outside air to a temperature suitable for drying.

FIG. 2 shows a second embodiment of the grain drying device in the grain storage bottle according to the present invention. This embodiment is provided with a pressure-feeding fan 15, and an air passage 16 is provided between the upper space of the grain accumulation storage chamber 3 and the blower side of the pressure-feeding fan 15.
And the exhaust port 17 to the outside air is provided in the lower ventilation chamber 2. In addition, the pressure feeding fan 15
The blast side is connected to the ventilation chamber 2 and can be opened and closed by a damper 18. 19 and 20 are ventilation channels 16 respectively
And a damper provided at the exhaust port 17. Pumping fan 15
Is equipped with a heating device that is activated as necessary. The other structure is the same as that of the embodiment shown in FIG.
The same components are denoted by the same reference numerals. Also in this embodiment, since the exhaust port 17 is located at the lowermost part of the storage bin 1, the air exhausted from the exhaust port 17 can be intensively processed without causing dust to rise into the air.

In the second embodiment described above,
If the pressure-feeding fan 15 is operated with the dampers 19 and 20 opened and the damper 18 closed, the grain accumulation storage chamber 3
The compressed air is supplied to the upper space of the air flow path 16 through the ventilation passage 16, and the compressed air flows downward through the accumulated grain layer 14 into the ventilation chamber 2 and is discharged from the exhaust port 17. When the outside air temperature is low, the heating device is operated to heat the sucked outside air to a temperature suitable for drying. Also, in this example,
The amount of compressed air sent to the ventilation passage 16 can be controlled by the opening degree of the damper 18. Further, if the damper 18 is opened and the dampers 19 and 20 are closed, the blown air can be blown upward from the ventilating chamber 2 side, and therefore downward blown air and upward blown air are repeated in a timely manner so that grain accumulation It is possible to prevent uneven drying of the accumulated grain layer 14 in the storage chamber 3.

[0014]

EFFECTS OF THE INVENTION According to the present invention, even if a stationary sedimentation layer of grain is formed in the lower portion of the grain accumulation storage chamber in the grain storage bin, the portion is not overdried and is uniformly dried throughout. In addition, it is possible to obtain an effect that the product can be stored in a homogeneous state as a whole even after being dried.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a grain drying device in a grain storage bottle according to the present invention.

FIG. 2 is a longitudinal sectional view showing a second embodiment of the grain drying device in the grain storage bottle according to the present invention.

[Explanation of symbols]

 1 Grain Storage Bin 2 Ventilation Wall 3 Grain Accumulation Chamber 4 Ventilation Chamber 5 Suction Fan 6 Air Guide 7 Heater 8 Exhaust Port 9 Mixing and Mixing Device 10 Grain Transfer Conveyor 11 Grain Discharge Conveyor 12 Grain Input Port 13 Leveler 14 Grain deposit layer 15 Pumping fan 16 Ventilation path 17 Exhaust port 18, 19, 20 Damper

Claims (3)

[Claims] 1. A grain storage bin is divided into a lower portion by a ventilation wall to form a grain accumulation storage chamber in the upper portion and a ventilation chamber in the lower portion, and the air in the ventilation chamber is sucked and discharged into the ventilation chamber. In addition to connecting a suction fan, an air duct leading to the outside air is provided in the upper space of the grain accumulation storage chamber to allow suction air to flow from the upper space of the grain accumulation storage chamber to the lower ventilation chamber through the accumulated grain layer. A grain drying device in a grain storage bottle, which is characterized by performing ventilation drying of grains accumulated in a grain accumulation storage chamber. 2. The lower part of the grain storage bin is divided into upper and lower parts by a ventilation wall to form a grain accumulation storage chamber in the upper part and a ventilation chamber in the lower part, respectively, and is pressure-fed to the upper space of the grain accumulation storage chamber through an air passage. In addition to connecting a fan, an exhaust port to the outside air is provided in the lower ventilation chamber, and the compressed air is circulated from the upper space of the grain accumulation storage chamber through the accumulated grain layer toward the lower ventilation chamber to enter the grain accumulation storage chamber. A grain drying device in a grain storage bottle, which is characterized by performing air-drying of accumulated grains. 3. A heating device for heating the suction air or the compressed air that circulates the suction air from the upper space of the grain accumulation storage chamber to the lower ventilation chamber through the accumulated grain layer. The grain drying device in the grain storage bottle according to claim 1 or 2.