JPH0714790Y2 - Paddy drying equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a drying facility for reducing moisture contained in paddy.

[Conventional technology]

The rice at the time of harvest usually contains about 20 to 28% of water, and in this water-containing state, it is not suitable for long-term storage and rice polishing, so the rice is dried. In this case, since the drying efficiency is extremely low in natural drying, forced drying is performed.

The conventional forced paddy drying method is to dry the paddy by blowing hot air generated by a burner or the like onto the paddy while carrying the paddy upward with a bucket conveyor and dropping the paddy from a high position. Is taken.

However, in the conventional forced drying method, hot air that reaches a maximum of 60 ° C is blown onto the paddy, so the surface suddenly dries and deteriorates, the nutrients are removed with the moisture near the surface, and the taste of cooked rice is improved. There was a problem of lowering.

As a solution to the problem of the forced drying method using hot air, Japanese Utility Model Laid-Open No. 56-163295 discloses a machine room in which an internal condenser, an evaporator, and a blower are housed on one side in a closed box, and unloading. Adjacent to the entrance plaza, a loading / unloading entrance with an open door is provided on the side facing the loading / unloading plaza, and a drainboard is laid horizontally in the lower part of the sealed box other than the machine room and loading / unloading plaza. There is disclosed a dehumidifying / drying storage device in which a storage chamber is formed in the upper part and a ventilation chamber is formed in the lower part, and the upper part of the machine chamber is connected to the storage chamber and the lower part is connected to the ventilation chamber. Then, by generating dry air or cold air in the condenser and the evaporator,
The dehumidifying and drying action of grains and the low temperature storage action are performed.

[Problems to be solved by the device]

However, in the above dehumidifying / drying storage room device, when small grains such as paddy are deposited at a predetermined height on the upper part of the drainboard and dried, the ventilation resistance of the paddy layer is not uniform with respect to the drainboard surface. Therefore, dry air or cold air passes through only a specific place to the upper part of the storage chamber as an air passage, and uneven drying occurs, and it is difficult to dry the entire paddy evenly. There was a problem that I could not.

The problem to be solved by the present invention is to uniformly dry the paddy even if the paddy layer accumulated in the drying chamber is thick.

[Means for Solving the Problems]

The paddy drying equipment of the present invention comprises a storage room for paddy, a device for loading and unloading paddy into the storage room, and cold air from a cold air generator installed adjacent to the storage room in the storage room. In a paddy drying equipment equipped with a device for blowing air into the storage room from the ceiling, the floor of the storage room has a double structure of an upper floor and a lower floor, and the upper floor is inclined downward toward the center, A mesh-shaped air passage part through which rice grain does not pass is provided in the central part, a plurality of pipes are erected at predetermined intervals on the upper floor of the storage chamber, and a forced air supply fan is provided on at least a part of the pipes, and the upper floor is The air is circulated through the pipe between the lower floor space and the upper part of the storage chamber.

It is possible to adopt a structure in which the air sucked from the storage chamber is cooled and dehumidified by a cool air generator and then circulated for use.

[Action]

In the paddy drying equipment of the present invention, the cold air blown into the storage chamber from above the paddy accumulated in the storage chamber passes through the paddy and sinks downward due to the difference in specific gravity and forced air supply by the pipe, It is sucked by the pipe, returned to the cool air generator, cooled, and blown into the storage chamber again. By blowing this cold air, the temperature of the storage room and the temperature of the paddy are raised to 15 ℃.
Dehumidify so that the water content of the paddy becomes 15 to 16%. The temperature and flow rate of the cold air blown into the storage chamber can be controlled based on the measurement result of the atmospheric temperature in the storage chamber and the moisture content of the paddy. In addition, loading and unloading paddy into the storage room is
It can be performed using a known loading / unloading device.

〔Example〕

FIG. 1 is a perspective view showing a structure of a main part of a paddy drying equipment according to an embodiment of the present invention, and FIG. 2 is a view showing a schematic structure of a building in which the drying equipment is installed.

In FIG. 1, the floor of the storage room 1 shown by the alternate long and short dash line has a double floor structure of an upper floor 2 and a lower floor 3. Upper floor 2
Has a downward slope toward the center in the width direction, and the mesh-shaped air passage portion 4 is provided in the center. The size of the mesh of the air passage part 4 is set so that the paddy cannot pass through it.
A duct 5 is provided below the air passage portion 4. The duct 5 is connected to a cold air generator (not shown) installed in the machine room 10 via a conduit (not shown).

Further, a plurality of pipes 6 and 7 for air circulation are erected on the upper floor 2. The pipe 6 has a suction fan 8 in the upper part, and is a pipe for sucking the air in the gap between the upper floor 2 and the lower floor 3 to the upper part of the storage chamber 1, and the pipe 7 is the air in the upper part of the storage chamber 1. Is a pipe for flowing into the gap between the upper floor 2 and the lower floor 3. This pipe 6 and suction fan 8
By the action of, the high temperature air in the gap between the upper floor 2 and the lower floor 3 is sucked into the upper portion of the storage chamber 1, and the cool air in the upper portion of the storage chamber 1 flows into the gap between the upper floor 2 and the lower floor 3 to circulate the cool air. However, the air in the gap between the upper floor 2 and the lower floor 3 is maintained at substantially the same temperature as the upper portion of the storage chamber 1.

For the cool air blown into the storage room 1, a known cold air generator (not shown) using a refrigerant is installed in the machine room 10 adjacent to the storage room 1, and cold air of about 6 ° C. is obtained by this cool air generator. The cold air is blown into the storage chamber 1 through the supply pipe 11 from the outlet 12 provided on the ceiling of the storage chamber 1.

The paddy deposited in the storage chamber 1 is loaded into the storage chamber 1 by a screw conveyor 14 and a hopper 15 installed from the paddy loading / unloading chamber 13 adjacent to the storage chamber 1 toward the storage chamber 1.
The hopper 15 is a well-known swivel type hopper and deposits paddy in the storage chamber 1 at a substantially uniform height. The height of paddy deposition is about 500 mm lower than the upper ends of the pipes 6 and 7 described above. In the case of the present embodiment, the size of the storage room 1 is such that the width a is 20 m and the length b is
Is 30m and the height c is 7m. The gap d between the upper floor 2 and the lower floor 3 is 500m.
When the paddy is deposited at a height of 5 m, the weight of the paddy is about 450 m.
It will be tons.

In the above configuration, when paddy is loaded into the storage room 1 and cold air is blown from the outlet 12, the cold air passes through the paddy and reaches the floor 2, and along the inclined surface of the upper floor 2, the cold air flows in the width direction. It flows to the central portion, passes through the air passage portion 4 and flows into the duct 5.
The air whose temperature has risen due to contact with the paddy is sucked into the machine room 1 from the duct 5, cooled and dehumidified, and blown into the storage room 1 again.

On the other hand, cold air also circulates in the gap between the upper floor 2 and the lower floor 3,
The air in the gap between the upper floor 2 and the lower floor 3 is maintained at substantially the same temperature as the upper portion of the storage chamber 1.

By blowing cold air in this way, the temperature of the accumulated paddy is maintained at about 15 ° C, and the water content of the paddy is reduced. In the case of the present example, by operating a cold air generator having a capacity of 25,000 cal for 72 hours with respect to the above-mentioned 450 tons of paddy, the water content at the time of charging was 28%, but was 15%. Diminished.

After the drying is completed, the operation of the drying equipment is interrupted and the paddy loading / unloading room 13
Open the door (not shown) between and, and carry out device (not shown)
Use to remove the paddy. Then, the paddy is again loaded into the storage room 1 and the operation of the drying equipment is restarted.

In this way, paddy can be efficiently dried without impairing the original taste of rice. Also, even if the paddy dried by this drying equipment is used for seed paddy, the germination rate is about 92%, which is about the same as the seed pad of conventional sun-dried rice.
No need for time-consuming sun drying for seed paddy.

Comparing the capacity of the drying equipment of this embodiment with the capacity of the conventional hot air drying type equipment, the equipment cost of one equipment of this embodiment is about 3.
300 million yen, the processing amount per hour is about 6.25 tons,
The cost of the conventional equipment is about 340 million yen for 5 units, and the total amount of treatment for 5 units per hour is about 1.5 tons. This means that, assuming the same facility cost, the facility of this example has a processing capacity four times or more that of the conventional facility, and if the processing capacity is the same, the facility cost is about 1/4. .

In the apparatus of the above-mentioned embodiment, a temperature measuring instrument for measuring the ambient temperature and a moisture measuring instrument for measuring the moisture content of the paddy are installed at arbitrary positions in the storage chamber 1, and the cool air is blown according to the measurement results of these measuring instruments. It is also possible to optimally and automatically control the drying of the paddy by adjusting the temperature and the flow rate. Also,
It is also possible to store the dried rice in the storage chamber 1 for a long time.

[Effect of device]

 The paddy drying equipment of the present invention has the following effects.

Since it is dried by keeping it at low temperature, it does not deteriorate the rice and does not impair the original taste of rice.

A large amount of paddy can be dried efficiently at one time, and the equipment cost is low compared to conventional hot air drying equipment.

Since the control items are the temperature and flow rate of cold air, automatic control is easy.

After drying, the upper body can be stored at low temperature for a long period of time.

Since the dried paddy can be used for seed paddy by the drying equipment of the present invention, it is not necessary to perform the troublesome sun drying.

Compared with a conventional device having a structure in which paddy is deposited on the slats, the forced cold air circulation by a plurality of pipes erected on the floor makes it possible to dry the cold air even if the paddy layer is thick.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a main part of a paddy drying equipment according to an embodiment of the present invention, and FIG. 2 is a view showing a schematic structure of a building in which the drying equipment is installed. 1: Storage room, 2: Upper floor 3: Lower floor, 4: Air passage part 5: Duct, 6,7: Pipe 8: Suction fan 10: Machine room, 11: Supply pipe 12: Outlet port, 13: Paddy carry-out Entry 14: Screw conveyor, 15: Hopper

Claims (2)

[Scope of utility model registration request] 1. A storage room for paddy, an apparatus for loading and unloading paddy into the storage room, and cold air from a cold air generator installed adjacent to the storage room from the ceiling of the storage room. In the paddy drying equipment equipped with a device for blowing into the storage room, the floor of the storage room has a double structure of an upper floor and a lower floor, and the upper floor is inclined downward toward the central part, and the paddy is placed in the central part. Is provided with a mesh-shaped air passage portion through which a plurality of pipes are erected at a predetermined interval on the upper floor of the storage chamber, and a forced air supply fan is provided on at least a part of the pipes, between the upper floor and the lower floor. A paddy drying equipment having a structure in which air is circulated through the pipe between the gap and the upper part of the storage room. 2. The paddy drying equipment according to claim 1, wherein the air sucked from the storage chamber is cooled and dehumidified by a cool air generator to be circulated for reuse.