JPH05332676A - Grain drying device - Google Patents

Abstract

PURPOSE:To obtain uniformly dried grain efficiently and select dust, mixed in the grain, efficiently by airflow by a method wherein a height from the surface of installation to a drying section is formed so as to be low to shift the grain in a receiving chamber smoothly toward a central discharging tray along a flowing and drying passage without being stagnated. CONSTITUTION:The inside of a drying cylinder 1 is divided by left and right flow partitioning plates 6, 6, inclined slowly toward a central discharging tray 2, and left and right blind partitioning plates 7, 7, inclined steeply, so that a receiving chamber 8 is formed in the upper part while a hot-airflow chamber 9 is formed in the lower part of the cylinder 1 respectively and an induced air discharging chamber 11, provided with vertical selecting airflow passages 12, 12 at both of left and right sides, is arranged in the receiving chamber 1. Slowly slanted short flowing and drying passages 13, 13, which are thin layers, are provided between the flow partitioning plates 6, 6 and the induced air discharging chamber 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a grain which can be efficiently and uniformly dried by allowing the grain to smoothly flow down along a fluid drying passage even if the height from the installation surface to the drying portion is made as low as possible. The present invention relates to a drying device.

[0002]

2. Description of the Related Art Conventionally, the inside of a drying cylinder is partitioned by a wall plate so that a paddy storage chamber is formed in the upper part and a pressure chamber is formed in the lower part, and an exhaust guide frame and a pressure chamber are arranged in the paddy storage chamber. A paddy drying device that can efficiently dry the paddy by forming an inclined drying passage toward the carry-out gutter between them and circulating the drying air from the pressure chamber toward the exhaust guide frame across the drying passage, Prior to the present application, for example, it is described in JP-B-53-9656 and is publicly known.

[0003]

By the way, in this type of conventional paddy drying apparatus, the drying passage is at least in order to smoothly flow down the paddy in the paddy accommodating chamber along the drying passage by the intermittent rotation operation of the discharge control valve. It was set at an inclination of 40 degrees or more. Therefore, in this kind of paddy drying apparatus, the height from the installation surface to the drying section is necessarily high, and as a result, the height of the entire drying cylinder becomes high, and there is a problem that it cannot be constructed compactly. Was.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to make the height from the installation surface to the drying portion low, Is it possible to obtain uniform dry grain efficiently by arranging so that the grain in the storage chamber can be smoothly fluidized and moved along the fluidized drying passage toward the central discharge gutter without stagnation?
An object of the present invention is to provide a grain drying device that can efficiently wind-separate dust mixed in grains.

[0005]

In order to achieve the above object, in the grain drying apparatus of the present invention, the inside of the drying cylinder is gently inclined toward the central carrying-out trough on which the continuously rotating feeding rolls are mounted. The left and right flow partition plates and the left and right blind partition plates that are steeply inclined toward the flow partition plates are partitioned so that a storage chamber is formed in the upper part and a hot air chamber is formed in the lower part. A suction / exhaust chamber having vertical selection air passages is provided on both sides, and a short fluid drying passage of a thin layer and having a gentle inclination is provided between the left and right fluid porous partition plates and the suction / exhaust chamber. It is a thing.

The vertical sorting air passage is provided between the vertical side walls provided on the lower left and right outer walls of the suction / exhaust chamber and the standing walls standing upright on both the left and right sides of the bottom wall so that dust can be favorably sorted. It was made possible.

Further, the left and right vertical walls are formed longer than the left and right standing walls and extend into the fluidized drying passage to form swirl portions of the dry air inside the left and right vertical side walls, and the intake air in the vertical selection air passage is also formed. By connecting the side to the swirl part, it is possible to prevent part of the grain from being sucked into the suction / exhaust chamber from the vertical sorting air passage and being discharged to the outside together with the dust air.

[0008]

Now, the grain is filled into the storage chamber and the left and right fluidized drying passages through the elevator and the carry-in device. Next, after the hot air generator is started and the suction / exhaust chamber is brought to a negative pressure state, the feeding roll is operated. By the way, the dry air generated in the hot air chamber is sucked and circulated at high speed in the direction of the arrows in the left and right fluidized drying passages from the left and right fluidized partition plates by the suction action inside the suction and exhaust chamber, and then the left and right vertical sorting air passages. After being sucked into the exhaust chamber, the air is concentrated and exhausted to the outside.

As a result, the grains filled in the thin-layer fluidized-drying passage move toward the central discharge gutter direction while exhibiting a floating state by the high-speed drying air that is sucked and distributed in the same direction as the traveling direction. At the same time, it was mixed in the grain at the same time as it was sequentially fed into the carry-out gutter by the feeding roll that was continuously exposed to the high-temperature drying air flowing during the flow transition and was uniformly dried. The dust having a low specific gravity floats upward during the flow transition, is separated from the grain, and is completely wind-sorted with the grain while passing through the vertical sorting air passage, and is collectively discharged outside the machine together with the exhaust air.

On the other hand, even if a part of the grain in the process of flowing and moving toward the carry-out gutter while exhibiting the fluidized dry state is sucked into the suction exhaust chamber through the left and right vertical sorting air passages, inside the left and right vertical walls. A vortex part where the dry air is swirled is installed in the sewage flow path, and this vortex part is connected to the lower end of the vertical selection air passage, so the grains that are about to be sucked up rise in the vortex part in the dry air vortex part. It stalls and falls into the fluidized drying passage, and it is possible to prevent the grain from being sucked into the suction / exhaust chamber through the vertical sorting air passage and discharged to the outside with the dust air. The effect of separating and sorting from dust can be further improved.

Therefore, even if the height from the installation surface to the drying section (fluid drying passage) is made low, the grains are smoothly fluidized and gradually transferred to the discharge trough without stagnation, and the grains are efficiently and uniformly dried. Forgiveness that can be done or dust sorting can be effectively achieved.

[0012]

EXAMPLES Examples will be described with reference to the drawings. In FIG. 1 and FIG. 2, reference numeral 1 denotes a horizontally long rectangular tube-shaped drying cylinder which is long in the front-rear direction. A delivery unit 4 is provided along the front-rear direction on the upper side of the delivery trough 2, and in the delivery unit 4, a delivery roll 5 that continuously rotates in one direction is accommodated horizontally. The left and right flow partition plates 6 and 6 that are gently inclined toward the carry-out gutter 2 and the left and right blind partition bodies 7 and 7 that are steeply inclined toward the left and right flow partition plates 6 and 6 are used for the drying cylinder 1. The inside is partitioned to form the accommodation chamber 8 in the upper part and the hot air chamber 9 in the lower part. The flow partition plates 6 and 6 are inclined in a direction substantially the same as the grain advancing direction under a high-speed condition of high-temperature dry air (for example, 60 ° C. or higher) in the hot air chamber 9 with a small opening ratio. A large number of inclined ventilation holes 10 ... Can be jetted to the. The tilted ventilation hole 10 may be a tilted opening at the end of a bulging portion provided in a bulge shape on the plate surface. A suction / exhaust chamber 11 having vertical sorting air passages 12, 12 on both left and right sides is horizontally provided in the partitioned storage chamber 8 along the front-rear direction, and the left and right flow partition plates 6, 6 are suctioned. Between the exhaust chamber 11 and the exhaust chamber 11, a thin fluidized drying passage 13, 13 having a gentle slope is formed. Therefore, the grains that have fallen from the storage chamber 8 into the left and right fluidized drying passages 13, 13 are blown by the ventilation holes 10 ... While being fluidized, it adapts to the continuous rotation operation of the payout roll 5 and is fluidized toward the carry-out gutter 2, and at the same time, it is exposed to high-temperature dry air evenly and does not cause barrel cracks.
It is dried uniformly. The left and right vertical selection air passages 12 and 12 described above include vertical side walls 15 and 15 provided under the left and right outer walls 14 and 14 forming the suction / exhaust chamber 11, and standing walls 17 standing on both left and right sides of the bottom wall 16. It is provided between 17 and. 18 and 18 are the left and right fluidized drying passages 1.
In the swirl part of the dry air provided near the inlets of the swirls 3, 13, the swirl part 18 forms the left and right vertical side walls 15, 15 longer than the left and right standing walls 17, 17, and the lower end thereof is formed. By deeply looking into the fluidizing and drying passages 13, 13, it is provided inside the left and right vertical side walls 15, 15, and the intake sides 19, 19 of the left and right vertical sorting air passages 12, 12 are swirled by the swirl part 18, A part of the grain which is connected to 18 and is in a fluid state is prevented from being sucked into the suction / exhaust chamber 11 through the vertical sorting air passages 12, 12. Reference numeral 20 is a hot-air generator provided with a burner or the like provided in the hot air chamber 9, and 22 is a suction / exhaust fan provided in a dust cylinder 21 which is open-connected to one side of the suction / exhaust chamber 11. Reference numeral 23 denotes an elevator vertically installed on one side of the drying cylinder 1. The lower part of the elevator 23 is connected to the carry-out side of the carry-out gutter 2 and the upper part thereof is provided with the carry-in installed laterally on the top of the dry cylinder 1. The starting end side of the gutter 24 is connected. Therefore, by adopting the drying section including the fluidized drying passages 13 and 13 as described above, it is possible to form the height H from the installation surface to the drying section lower than that of the conventional drying apparatus, or to make the configuration compact. it can.

[0013]

Since the present invention is configured as described above, it has the following effects. (A) Since it is a fluidized drying passage, the height from the installation surface to the drying section can be lowered, and even if it is possible to easily install and achieve the drying operation in any drying workshop, the grain is in a fluidized state. However, it can be smoothly moved to the discharge gutter. (B) The dust contained in the grain can be reliably wind-sorted by the left and right vertical sorting air passages, and the dust can be centrally discharged outside the machine together with the exhaust air to obtain a clean dry grain containing no dust. .. (C) Since the swirl part of the dry air is provided on the starting end side of the fluidized drying passage, that is, on the inside of the left and right vertical side walls, part of the floating grains is sucked into the suction / exhaust chamber by the suction air and discharged to the outside of the machine. Can be reliably prevented. (D) Since the flow-drying passage is extremely shortened to about 1/5 of the ventilation area of the conventional device, the ventilation efficiency is remarkably improved. (E) Since the pay-out roll is continuously rotated, the flow state in the drying section is not only promoted, but also the time per circulation can be shortened and high-speed drying can be performed. (F) Grains in the floating drying passage are constantly flowed in a floating state by the ventilation effect of the drying air from the lower part, so the drying air hits the entire grain surface to promote the heat receiving effect and make the grains uniform. Can be dried. (G) Since the grains are transferred in a fluidized state in a thin-layer fluidized drying passage, it is possible to dry without causing the cracking phenomenon even with high-temperature (for example, 60 ° C. or higher) dry air. As a result, the drying loss rate could be 1.2% or more. (H) By using the hot air chamber in the entire lower part of the two-layer type dryer, it was possible to prevent uneven drying on the left and right and uneven flow. (I) Since the structure of the drying unit is extremely simplified, an inexpensive grain dryer can be provided. (J) In the fluidized porous partition plate, since the opening ratio is made small and the dry air is circulated from the lower part to the upper part at a high speed,
Accurate distribution can be achieved without causing clogging due to adhesion of dust particles or the like to the fluidized partition plate.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a grain drying device.

FIG. 2 is an enlarged vertical sectional view of a main part with a part cut away.

[Explanation of symbols]

 1 Drying Cylinder 2 Delivery Gutter 5 Feeding Roll 6 Fluid Partition Plate 7 Blind Partition Plate 8 Storage Room 9 Hot Air Chamber 11 Suction / Exhaust Chamber 12 Vertical Selection Air Channel 13 Fluid Drying Passage 14 Outer Wall 15 Vertical Side Wall 16 Bottom Wall 17 Standing Wall 18 Vortex Department

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takao Seki 2-21-10 Nishi 2-chome, Hanyu-shi, Saitama Kaneko Agricultural Machinery Co., Ltd.

Claims (3)

[Claims] 1. A left and right flow partition plate that is gently inclined toward a central carrying-out gutter in which a feeding roll that continuously rotates is accommodated in a drying cylinder, and left and right blind partitions that are steeply inclined toward the flow partition plate. A plate and a partition are formed so that an accommodation chamber is formed in the upper part and a hot air chamber is formed in the lower part. A grain drying apparatus, characterized in that a thin fluidized drying passage having a gentle slope is provided between the porous partition plate and the suction / exhaust chamber. 2. The vertical selection air passage is provided between a vertical side wall provided on the lower left and right outer walls of the suction / exhaust chamber and an upright wall standing upright on both left and right sides of the bottom wall. Grain dryer. 3. The left and right vertical walls are formed longer than the left and right standing walls and extend into the fluidized drying passage to form swirl portions of the dry air inside the left and right vertical side walls, and the intake air of the vertical selection air passage is also formed. The grain drying device according to claim 1, wherein the side is connected to the swirl portion.