JPS584270B2 - storage drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows harvested paddy with a high moisture content to be dried slowly without causing any rotting or deterioration phenomena, so that it can withstand long-term storage, and also allows paddy that has been left to stand still to be dried. The present invention relates to a storage drying device that can quickly and accurately discharge air using fresh air.

The so-called one-stage drying method in which harvested paddy with a high moisture content is continuously or intermittently dried to the finished moisture content is well known as a circulation drying method or a tempering drying method.

And according to the above drying method, 1
When the maximum amount of paddy processed per day is brought in, the paddy can be quickly dried, but once the amount of high moisture raw paddy that exceeds the maximum amount processed per day is brought in, the amount of raw paddy that exceeds the fixed amount will be stored. It is also well known that if the method is not used properly, it will generate heat, deteriorate in quality within half a day, and cause discoloration and peeling.

Generally, raw paddy harvested by harvesting machines etc. is approximately 25% to 2%.
It has a moisture content of 75%, and in order to dry or store such high moisture raw rice without deterioration or coloring, it is necessary to dry the high moisture raw rice in an appropriate pre-dryer. Approximately 18
It has been proven through experiments that if it is dried down to about 1.5%, it can be stored for about a month at room temperature even if it is deposited without ventilation, unless it is particularly hot and humid.

Therefore, even if raw paddy, which has been harvested in large quantities at one time using efficient harvesting machines in recent years, is brought to a drying facility, it does not cause any deterioration or discoloration, and the purpose is to allow the drying process to be carried out while it is stored. Storage and drying methods have been attracting attention.

The storage drying method described above generally involves putting the harvested raw paddy into a grain, silo, or bin, and, in principle, blowing room-temperature air through it and allowing it to air dry in a stationary manner until the finished moisture is reduced.After that, the paddy is The idea is to store it as is in the bottle.

Therefore, when drying high-moisture raw paddy using the above-mentioned drying facility, the drying speed is slow and it takes 1 to 2 months if the paddy is piled up thickly, resulting in a severe failure rate. Since it slowly reaches the exhaust side, it causes "uneven drying" which is a drawback of stationary ventilation drying.

Therefore, in order to improve the drying efficiency, the present inventor first dried the harvested raw paddy with high moisture content using one or more pre-dryers to quickly reduce the drying content to approximately 18%. Then, if the reduced paddy is dried using one or more finishing dryers while slowly accumulating the finished moisture, it is possible to not only improve drying efficiency but also perform appropriate rotation. "Uneven dryness"
As a result, even if a large amount of raw rice is brought to a drying facility at once, it can be stored and dried without causing deterioration or discoloration.

If the drying air used for pre-drying and final drying as described above is used effectively to carry out the unloading of paddy, the overall structure of the device will be simpler and storage will be cheaper and easier to operate. A storage/drying device has been developed that can efficiently store and dry a large amount of raw paddy, and the configuration of the device will be described with reference to a preferred embodiment shown in the attached drawings. .

Reference numeral 1 denotes a pre-dryer for drying harvested high-moisture raw paddy to approximately 18%, and the pre-dryer 1 has a paddy passage 4 formed with a plurality of rows of ventilation chambers 3 at the bottom of the main body 2. The left and right side walls 3a, 3b of the ventilation chamber 3 are provided with cut-and-raised pieces 5 on the lower side thereof, as shown in FIG. A large number of blowholes 6 are opened along the bottom of the paddy passage 4 that can blow out all at once toward the discharge side, and the upper main body 2 of the ventilation chamber 3 distributes dry air evenly to the raw paddy filled in the main body 2. A porous air blower 7 that can be exposed to air to perform a drying action and a blower 8 that has an open bottom end that quickly discharges the drying air emitted from the air blower 7 to the outside of the wood body 2 are alternately installed. The pre-dryer 1 described above is arranged in stages in a horizontal direction, and one or more pre-dryers 1 are installed in a vertically elongated manner.

Reference numeral 9 denotes a finishing dryer that can dry the rice, which has been predried to a moisture content of about 18% by the pre-dryer 1, to a finished moisture level by ventilation.
A plurality of rows of ventilation chambers 11 are erected in parallel at the bottom so as to form a paddy passage 12, and the left and right side walls 11a of the ventilation chambers 11 are
, 11b is configured to have a large number of blowholes 13 formed by forming cut-and-raised pieces in the same way as the pre-dryer 1 so that wind can be blown out all at once on the paddy passage 12 toward the discharge side. The above-mentioned finishing dryer 9 is also installed in one or more machines in a vertically long manner.

The pre-dryer 1 and the finishing dryer 9 are arranged facing each other so that an appropriately sized air supply chamber 14 is provided in the middle, and the air supply chambers 3 and 11 of the dryers 1 and 9 and the blow lice are provided in the middle. One end of the body 7 is connected to the ventilation supply chamber 14 through ventilation ports 15, 16, and 17 equipped with suitable on-off valves (not shown), thereby effecting a flow-blocking effect of air.

The upper parts of the preliminary dryer 1 and the finishing dryer 9 are formed in an open shape, and the blower 1 is installed on one side of the air supply chamber 14.
8 are connected.

Discharge tubes 19 having on-off valves 20 are connected to the discharge sides of the paddy passages 4 and 12 provided in the pre-dryer 1 and the finishing dryer 9, respectively, and the lower ends of these tubes are connected to the conveyor belts 21 and 2.
2 It is shown above.

The conveyor belts 21 and 22 are connected to conveyor belts 24 and 25 which are connected to an elevator 23, and perform a movement conveyance operation and a collection operation of the paddy.

Further, two supply pipes 26 and 27 are connected to the upper part of the elevator 23 via a switching device (not shown), and the supply pipes 26 and 27 are connected to the upper part of the preliminary dryer 1 and the finishing dryer 9. It is connected to carry-in gutters 28 and 29 installed horizontally, and raw paddy or half-dried paddy is supplied to any desired dryer by means of a conveyor belt 30.

As shown in FIG. 4, one end of the above-mentioned air exhaust body 8 communicates with the outside of the main body 2 through an opening 31.

Reference numeral 32 indicates a pit for stakeout, and reference numeral 33 indicates the outline of the drying chamber.

Next, the operation of the present invention will be explained.

If the raw paddy with high moisture content just harvested is continuously put into the loading pit 32, the raw paddy is carried into the pre-dryer 1 attached thereto via the elevator 23, the supply pipe 26 and the carry-in gutter 28 and is filled. .

When a predetermined amount of paddy is filled in this way, only the ventilation ports 16 and 17 of the finishing dryer 1 filled with raw paddy are opened, and the air blower 18 is operated. The air is supplied to the air body 7 and ejected through the fumarole 6 into the rice filled with rice.

As a result, the raw rice filled in a stationary state is stored in the fumarole 6.
The water is reduced to about 18% moisture by being exposed to the flow of the wind blowing out from the air and the flow of the wind coming out from the blowing body 7 and entering the exhaust body 8.

Once the raw paddy harvested in this way has been pre-dried in the pre-dryer 1, the on-off valve 20 is raised to open the discharge tube 19, and the filled paddy is automatically discharged to the angle of repose and transferred to the conveyor belt. 21 and 24, it is transported to the elevator 23 side.

As a result, due to the automatic ejection action as described above, the ejection pipe 19
Paddy is deposited in a thin layer on the nearby paddy passage 4.

However, since air is always directed toward the discharge side from the fumarole hole 6, the aforementioned paddy is sequentially blown toward the discharge side by the blowing action of this blowing wind, so that not a single grain of paddy is left behind. The materials are discharged, passed through the conveyor belts 21 and 24, the elevator 23, the supply pipe 27, and the conveyor gutter 29, and then charged into the finishing dryer 9 arranged in parallel.

When the pre-dried paddy is filled into the finishing dryer 9, the air outlet 16 is opened and the introduced air is blown out from the fumarole 13 in the same manner as described above, so that the paddy is distributed upward. In addition to finishing drying by being exposed to wind, the drying action can be carried out while being stored by adjusting the amount of air supplied.

Of course, new raw rice can be supplied to the pre-dryer 1 which becomes empty during the above-mentioned finishing drying operation for pre-drying.

Finish drying is completed with the above operations, and when you want to take out the dried paddy, raise the on-off valve 20 and open the discharge pipe 19 in the same way as described above.The filled paddy is automatically discharged to the angle of repose, and then discharged. The paddy remaining in the main body 10 is moved to the discharge side through the paddy passage 12 by the blowing action of the wind from the fumarole holes 13 that blow out all at once toward the side, and is then transferred to an appropriate place via the conveyor bells 22 and 25. will be collected.

Therefore, if the number of the preliminary dryers 1 and finishing dryers 9 are installed according to the processing capacity, rotation can be performed arbitrarily during drying to prevent uneven drying. The grains are semi-dried, transferred to the finishing dryer 9, a part of which is finished dried, and then left to cool before being sent to the hulling process.

In addition, the paddy stored in a semi-dry state is appropriately stacked in a thick pile, and on days when raw paddy is not brought in due to rain, or after the harvest is completed, it is transferred to the pre-dryer 1 for finishing drying. Alternatively, when high-moisture paddy is brought in in excess of the processing capacity of the pre-dryer 1, the excess amount is temporarily stored in the finishing dryer 9 to provide ventilation and prevent deterioration of the raw paddy, and then the pre-dryer 1 for semi-drying, and then transferred again to the finish dryer 9 for final drying, and various other drying operations can be performed.

Therefore, according to the apparatus of the present invention, even if a large amount of high-moisture raw paddy is brought in under any conditions, it can be dried in a good condition without causing deterioration or coloring, and the paddy can be dried. Is it possible to store it for a long time without deterioration or spoilage, and to discharge it when necessary?
Since the loaded paddy can be automatically discharged using the air used during preliminary drying and final drying, the discharge device can be made very simple and the entire device can be provided at low cost, and it can also be used to perform various drying processes. Not only can more accurate drying work be carried out, but also the effect of providing the air supply chamber 14 between the pre-dryer 1 and the finishing dryer 9 so that the air blowing action can be carried out in one air supply chamber 14 can be improved. play.

[Brief explanation of the drawing]

The drawings show one embodiment of the device of the present invention.
The figure is a plan view, Figure 2 is a cross-sectional view taken along the line A-A in Figure 1, Figure 3 is an enlarged perspective view with a portion of the blow chamber cut away, and Figure 4 is a part of the blower and exhaust body. FIG. 5 is a partially cutaway enlarged perspective view of the ejector; FIG.
FIG. 6 is an enlarged perspective view with a portion of the exhaust body cut away. 1... Pre-dryer, 2... Main body, 3... Ventilation chamber,
4... Rice passage, 6... Fumarole, 7... Fumarole, 8
...Exhaust body, 9...Finishing dryer, 10...Main body,
11...Blower chamber, 12...Paddy passage, 13...Blowhole, 14...Blower supply chamber.

Claims (1)

[Claims] 1. A plurality of rows of ventilation chambers are installed in parallel at the bottom of the main body so as to form a paddy passage, and a large number of blowholes are opened in the lower parts of the left and right side walls of the ventilation chambers to blow out air toward the discharge side. In the main body above the blowing chamber, there is a pre-dryer consisting of one or more units configured by alternately tiering blowing bodies and exhaust bodies, and a paddy passage is formed with multiple rows of blowing chambers at the bottom of the main body. A finishing dryer consisting of one or more finishing dryers installed in parallel in parallel and having a large number of blowholes opened in the lower parts of the left and right side walls of the above-mentioned ventilation chamber to blow out air toward the discharge side. 1. A storage drying device characterized in that the air blowing supply chambers are connected to the respective air blowing chambers and the blowing body.