JPS6119431Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is based on the invention that when the grain that has been dried to some extent in the ventilation drying section is thrown into the outside air circulation room in the form of scattered grains by the throwing action of the throwing elevator, the grain is exposed to outside air. This grain drying device is capable of efficiently drying circulating grains by actively blowing drying air flowing from an entrance window into an outside air circulation chamber and then from a throwing elevator toward a negative pressure chamber to perform a drying action again. Regarding.

Conventionally, an elevator was attached to one side of the dryer body in which a conditioning tank, ventilation drying cylinder, and take-out tank were stacked three-dimensionally from the upper stage to the lower stage, and the upper part of the elevator was installed horizontally at the top of the dryer body. The supply side of the carrying-in device is connected to the supply side, and the lower part is connected to the take-out tank, and the grains filled into the tempering tank are connected to the drying tank through the elevator and the carrying-in device. A grain drying device that performs a circulation drying operation in which the grain is discharged into a take-out tank while being dried for several minutes and then returned to the conditioning tank via an elevator and a carry-in device was developed prior to the filing of this application, for example, in
It is described in Japanese Patent No. 36753 and is well known.

By the way, in the case of conventional drying equipment of this type,
Due to the structure of the drying equipment, the circulated grain is dried once during one cycle, and thereafter only the grain tempering action or grain transport action is performed, and as a result, the time required for one cycle is In contrast, the drying time was extremely short, which caused the problem that it was not possible to shorten the drying time of grains.

Therefore, in the present invention, an outside air circulation chamber with an outside air intake window opened in the upper part of the storage chamber is provided, and this outside air circulation chamber is connected to the ventilation drying section through a throwing elevator and a negative pressure chamber, so that the outside air can be used for ventilation drying work. After the normal temperature outside air enters through the entrance window and passes through the outside air distribution room, the throwing elevator,
The grain is allowed to flow through the negative pressure chamber to the ventilation drying section, and when the grain that has been somewhat ventilated in the ventilation drying section is thrown into the outside air distribution room by the throwing elevator, the grain and the circulating room temperature outside air are separated. The moisture on the surface of the grain is evaporated by contact with the grain, and the grain tempering effect is effectively carried out in the storage chamber until the next ventilation drying, so that the drying time can be easily increased compared to the one circulation time. The above-mentioned problem is solved by providing a grain dryer which has the purpose of shortening the final drying time of grain.

In view of the above, and in order to achieve the above object, the present invention has a structure in which the interior of the dryer body is a pair of porous partition plates installed diagonally toward the discharge section, with a storage chamber in the upper part and a negative pressure chamber in the lower part. In the storage chamber, there is provided a ventilation drying section configured by arranging a ventilation chamber so that a drying passage is formed between a pair of porous partition plates. The upper side of the chamber is formed as an outside air circulation chamber, and on one side of the dryer main body, the upper side is connected to the outside air circulation chamber through a throwing window.
Further, the grain drying device is equipped with a throwing elevator whose lower part is connected to a negative pressure chamber through a ventilation passage, and an outside air intake window is opened in the outside air circulation chamber on the opposite side to the opening side of the throwing window. This is a device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus of the present invention will be described with reference to a preferred embodiment shown in the accompanying drawings.

In the drawings, reference numeral 1 denotes a dryer main body in the shape of a rectangular rectangular cylinder. A storage chamber 3 is formed in the lower part of the storage chamber 3, and a negative pressure chamber 5 is formed in the lower part of the storage chamber 3.
The wall surfaces facing the porous partition plates 13, 13 were made porous surfaces 15, 15, respectively, so that drying passages 16, 16 whose upper ends were connected to the storage chamber 3 and whose lower ends were connected to the discharge section 12 were formed between the two. Approximately diamond-shaped ventilation chamber 14
A ventilation drying section 4 is provided, and a suction exhaust fan 17 is installed on one side of the exhaust chamber 14. An outside air circulation chamber 2 having an internal cavity is integrally provided on the upper side of the storage chamber 3.

On one side of the dryer main body 1, a throwing elevator 6 is installed, which houses a rotating belt 7 on which a large number of throwing buckets 8 are attached. The lower part is connected to the outside air circulation chamber 2 and the lower part is connected to the negative pressure chamber 5 through the ventilation passage 10, and an outside air intake window 11 is opened on one side of the outside air circulation chamber 2 opposite to the opening side of the throwing window 9. has been done. The above-mentioned outside air circulation chamber 2 is formed in the shape of a cavity, and has the function of allowing the grains thrown from the throwing window 9 to drop into the storage chamber 3 on the lower stage in a flat shape while exhibiting the shape of scattered grains, and to store the grains thrown in the form of scattered grains. Outside air intake window 11 for grain
It has the role of blowing room-temperature outside air that traverses the inside of the outside air distribution chamber 2, passes through the throwing window 9, the throwing elevator 6, and the negative pressure chamber 5, and flows toward the ventilation chamber, thereby evaporating moisture on the surface of the grain.

Reference numeral 18 denotes a swinging grain removal body provided below the discharge section 12 so as to be able to swing in the left and right directions about the support shaft 19. At the bottom of the negative pressure chamber 5 further below the oscillating grain threshing body 18, there is disposed a carry-out belt 21 which is suspended horizontally in the horizontal direction via a hopper 20, and the carry-out side of the carry-out belt 21 is is connected to the lower part of the throwing elevator 6 via a ventilation path 10. 22 is a hot air generator installed on one side of the negative pressure chamber 5.

Next, its effect will be explained.

Now, if the throwing elevator 6 is operated and grain is then supplied to the throwing elevator 6, the grain will be thrown through the throwing window 9 into the outside air circulation chamber 2 by the throwing action of the rotating throwing bucket 8.
Some of the grains that are carried into the interior in a powdered state and filled into the storage chamber 3 and the ventilation drying section 4 are transferred to the discharge section 1.
It is placed at an angle of repose on the swinging grain threshing body 18 which is in a horizontal state from 2 onwards. When a predetermined amount of grain is filled in this way, the supply is stopped, and then the swinging grain removal body 18, the carry-out belt 21, the suction exhaust fan 17, and the steam generator 22 are operated, and the outside air intake window 11 is operated. Open. Then, the drying air generated in the negative pressure chamber 5 will smoothly flow through the drying passages 16, 16 toward the ventilation chamber 14 due to the suction action of the suction and exhaust fan 17, and the outside air will be circulated through the outside air intake window 11. Another drying air sucked into the chamber 2 crosses the outside air circulation chamber 2, passes through the throwing window 9, the throwing elevator 6, and the air passage 10, and is sucked into the negative pressure chamber 5, and is drawn into the drying passage 16 together with the previous drying air. , 16 to the exhaust chamber 14. Therefore, the grains in the storage chamber 3 are subjected to the first drying action while being sequentially flowed down through the pair of drying passages 16, 16 toward the discharge section 12 by the alternating left and right rocking motions by the rocking grain scraper 18. After receiving and drying, the somewhat dried grains are discharged onto a carry-out belt 21 via a hopper 20 by the discharging action of the oscillating grain threshing body 18. Then, the grain is sent to the throwing elevator 6 by the carrying belt 21, and after being scooped up by a number of throwing buckets 8, it is vigorously thrown into the outside air circulation room 2 in a scattered state through the throwing window 9, and is thrown. A second drying action is carried out in which the grain is brought into contact with circulating ambient temperature outside air, and is stored in a storage chamber 3 in an even state while instantly absorbing and removing moisture on the surface of the grain.

Therefore, the grain is subjected to the drying action twice in one cycle, and the drying is accelerated, and the grain whose surface water level has been removed by the second drying action is stored in the storage chamber 3 for a certain period of time. Therefore, the tempering effect can be enhanced and internal moisture can be diffused and transferred to the surface to suit the next drying operation.

As described above, since the grain is dried twice during one circulation, the drying time can be significantly shortened and the drying efficiency can be improved.

In short, the present invention consists of a pair of porous partition plates 13 installed obliquely toward the discharge section 12 inside the dryer main body 1;
13, the storage chamber 3 is partitioned so that the storage chamber 3 is formed in the upper part, and the negative pressure chamber 5 is formed in the lower part.
Inside, a ventilation chamber 14 is formed so that drying passages 16, 16 are formed between the pair of porous partition plates 13, 13.
A ventilation drying section 4 is provided, and the upper side of the storage chamber 3 is formed into an outside air circulation chamber 2, and the upper part is connected to the outside air circulation chamber 2 through a throw window 9 on one side of the dryer main body 1. 2 is equipped with a throwing elevator 6 whose lower part is connected to the negative pressure chamber 5 through a ventilation path 10, and an outside air intake window 11 is opened in the outside air circulation chamber 2 on the opposite side to the opening side of the throwing window 9. Therefore, storage chamber 3,
The circulating grain, which is thrown into the upper outside air circulation chamber 2 through the ventilation drying section 4, negative pressure chamber 5, and throwing elevator 6, in a powdered state, is transferred to the ventilation drying section 4 and the outside air circulation during one circulation. Since the grains are dried by being exposed to the drying air circulating in the chamber 2 and outside air at room temperature, it is possible to significantly shorten the drying time and improve drying efficiency. The throwing direction and the direction of flow of room-temperature outside air taken into the outside air circulation chamber 2 through the outside air intake window 11 are made to be opposite to each other, thereby making the evapotranspiration effect of grain surface moisture effective, and grains from which surface moisture has been removed. It is possible to immediately accommodate the material in the lower storage chamber 3 and effectively perform a tempering action sufficient to receive the next drying action.

[Brief explanation of the drawing]

The drawings show an embodiment of the device according to the present invention, in which FIG. 1 is a longitudinal sectional front view, and FIG. 2 is a side view with main parts cut away. 1...Dryer body, 2...Outside air circulation room, 3...
Storage chamber, 4... Ventilation drying section, 5... Negative pressure chamber, 6...
...Throwing elevator, 9...Throwing window, 10...Ventilation path,
11... Outside air intake window, 12... Exhaust section, 13...
A pair of porous partition plates, 14...exhaust chamber, 16...drying passage.

Claims (1)

[Scope of utility model registration request] The inside of the dryer body is divided by a pair of porous partition plates installed diagonally toward the discharge section, so that a storage chamber is formed in the upper part and a negative pressure chamber is formed in the lower part. A ventilation drying section is provided in which an air exhaust chamber is arranged so as to form a drying passage between the porous partition plate and the upper side of the storage chamber is formed as an outside air circulation chamber. A throwing elevator is attached to the side, and the upper part is connected to the outside air circulation chamber through the throwing window, and the lower part is connected to the negative pressure chamber through the ventilation path. A grain drying device characterized in that an outside air intake window is opened.