JP3043520B2 - Grain drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain which can be dried efficiently and uniformly even when the height from the installation surface to the drying section is made as low as possible. It relates to a drying device.

[0002]

2. Description of the Related Art Conventionally, the inside of a drying drum is partitioned by a wall plate so as to form a paddy storage chamber at an upper part and a pressure chamber at a lower part, respectively. A paddy drying device that forms a slanted drying passage toward the discharge gutter between them, and allows the drying air to flow from the pressure chamber to the exhaust guide frame across the drying passage to dry the paddy efficiently. Prior to the present application, it is known, for example, as described in Japanese Utility Model Publication No. 53-9656.

[0003]

By the way, in this conventional seed rice drying apparatus, the drying passage is required to flow down along the drying passage smoothly by intermittent rotation of the discharge control valve. It is set at an inclination of 40 degrees or more. Therefore, in this seed rice drying apparatus, there is a problem that the height from the installation surface to the drying section is inevitably high, and as a result, the height of the entire drying drum becomes high, so that it is not possible to construct a compact body. Was.

[0004] The present invention has been made in view of such problems of the prior art, and an object of the present invention is to reduce the height from the installation surface to the drying section. Is it possible to obtain uniform dry grain efficiently by configuring so that the grain in the storage room can flow smoothly along the fluidized drying passage to the central discharge gutter without stagnation,
It is an object of the present invention to provide a grain drying apparatus capable of efficiently separating dust mixed in grains by wind.

[0005]

In order to achieve the above object, in the grain drying apparatus according to the present invention, the inside of the drying drum is inclined gradually toward a central discharge gutter on which a continuously rotating feed roll is mounted. The left and right flow partition plates and the left and right blind partition plates that are steeply inclined toward the flow partition plate are partitioned so that an accommodation room is formed at an upper portion and a hot air chamber is formed at a lower portion, respectively. A suction / exhaust chamber provided with vertical sorting air passages on both sides is provided, and a thin, gentle, slanted, short flow drying passage is provided between the left and right flowing porous partition plates and the suction / exhaust chamber. Things.

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

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 a swirling portion of the drying air inside the left and right vertical side walls. The side is connected to a vortex part to prevent a part of the grain from being sucked into the suction / exhaust chamber from the vertical sorting air passage and discharged to the outside together with the dust wind.

[0008]

Now, the grain is filled into the storage chamber and the left and right fluidized drying passages via the elevator and the loading device. Next, after the hot air generator is started and the suction / exhaust chamber is brought into a negative pressure state, the feeding roll is operated. Then, the drying air generated in the hot air chamber is sucked and circulated at high speed in the left and right flow partitioning passages in the direction of the arrow from the left and right flow partitioning plates by the suction action of the suction and exhaust chamber side, and then the left and right vertical sorting air passages After being sucked into the exhaust chamber through the, the air is concentrated and exhausted to the outside to perform a suction and exhaust operation.

As a result, the grains filled in the thin-layer fluidized drying passages flow toward the central discharge gutter while floating in the high-speed drying air sucked and circulated in substantially the same direction as the traveling direction. It was simultaneously taken out into the discharge gutter by a delivery roll rotating continuously while being uniformly dried and uniformly dried by the high-temperature drying air circulating during the flow transition, and at the same time, was mixed into the grain Light dust having a specific gravity rises upward during the flow transition, is separated from the grains, and is completely separated from the grains while passing through the vertical sorting wind path.

On the other hand, even if a part of the grain in the process of being flow-transferred toward the discharge gutter while being in a fluid-dry state is going to be sucked into the suction / exhaust chamber through the left and right vertical selection air passages, the inside of the left and right vertical walls is not removed. Is provided with a vortex part in which the drying wind has a vortex state, and this vortex part is connected to the lower end of the vertical sorting wind path, so that the grains that flew upward as they were sucked in the vortex part of the drying wind The stall is dropped into the fluidized drying passage, and the grain is never sucked into the suction and exhaust chamber through the vertical sorting air passage and is prevented from being discharged outside the machine together with the dust wind. 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 formed low, the grains are smoothly flow-transferred sequentially to the discharge gutter without stagnation, and the grains are efficiently and uniformly dried. Forgiveness or wind sorting of dust can be effectively achieved.

[0012]

An embodiment will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a drying cylinder having a horizontally long rectangular tube shape which is long in the front-rear direction. Along with the disposition, a feeding portion 4 is provided on the upper side in the discharge gutter 2 along the front-rear direction. In the feeding portion 4, a feeding roll 5 that rotates continuously toward one side is stored and suspended. The drying cylinder 1 is formed by the left and right flow partition plates 6 and 6 that are gently inclined toward the inside of the discharge gutter 2 and the left and right blind partition members 7 and 7 that are steeply inclined toward the left and right flow partition plates 6 and 6. The inside is partitioned, and the accommodation room 8 is formed in the upper part, and the hot air chamber 9 is formed in the lower part. The flow partition plates 6 and 6 have a small opening ratio and a high-temperature dry air (for example, 60 ° C. or more) in the hot air chamber 9 is inclined in a direction substantially the same as the grain traveling direction under a high-speed state. Are formed. A large number of inclined ventilation holes 10. The inclined ventilation holes 10 may be opened at an end of a bulging portion projecting from the plate surface in a bulging manner. Inside the partitioned accommodation room 8, suction and exhaust chambers 11 provided with vertical sorting air passages 12 and 12 on both the left and right sides are provided horizontally along the front-rear direction. Between the exhaust chamber 11, short fluid drying passages 13, which are thin and have a gentle slope, are formed. Therefore, the grains falling into the left and right fluidized drying passages 13 from the storage chamber 8 are in a floating state due to the dry air sucked and circulated under the high-speed state with more ventilation holes 10. While being fluidized, the fluid is transferred toward the discharge gutter 2 in accordance with the continuous rotation operation of the feeding roll 5, and at the same time, it is uniformly exposed to high-temperature dry air, so that no body cracks are generated.
It is dried uniformly. The above-mentioned left and right vertical selection air passages 12, 12 are provided with vertical side walls 15, 15 provided below left and right outer walls 14, 14 forming the suction / exhaust chamber 11, and upright walls 17, standing on both left and right sides of a bottom wall 16. 17 is provided. 18, 18 are left and right fluidized drying passages 1
The swirling portion 18 is provided near the entrances of the drying winds 3 and 13. The swirling portion 18 has left and right vertical side walls 15 and 15 formed longer than the left and right standing walls 17 and 17. By being deeply drawn into the fluidized drying passages 13, 13, they are provided inside the left and right vertical side walls 15, 15, and the suction sides 19, 19 of the left and right vertical selection air passages 12, 12 are connected to the vortex sections 18, 19. 18 to prevent a part of the grains in the flowing state from being sucked into the suction and exhaust chamber 11 through the vertical sorting air passages 12 and 12. Reference numeral 20 denotes a hot air generator including a burner or the like provided in the hot air chamber 9, and reference numeral 22 denotes a suction air blower provided in a dust discharge tube 21 which is connected to one side of the suction and exhaust chamber 11. Reference numeral 23 denotes an elevator installed on one side of the drying cylinder 1, and a lower part of the elevator 23 is connected to a discharge side of the discharge gutter 2, and an upper part is a loading side mounted on the top of the drying cylinder 1. The starting end of the gutter 24 is connected. Therefore, by adopting the drying section including the fluidized drying passages 13 as described above, it is possible to reduce the height H from the installation surface to the drying section lower than that of the conventional drying apparatus, or to reduce the configuration thereof. it can.

[0013]

Since the present invention is configured as described above, the following effects can be obtained. (A) Since it is a fluidized drying passage, the height from the installation surface to the drying section can be lowered, and in any drying work place, it is possible to easily install and achieve the drying operation, and the grain is in a flowing state. However, the flow can be smoothly moved toward the discharge gutter. (B) The dust contained in the grain is reliably separated by wind in the left and right vertical sorting air paths, and the dust is concentrated and discharged outside the machine together with the exhaust air, so that a clean dry grain containing no dust can be obtained. . (C) Since the swirling portion of the drying air is provided at the start end side of the fluidized drying passage, that is, inside the left and right vertical side walls, a part of the floating grain is sucked into the suction and exhaust chamber by the suction air and discharged outside the machine. Can be reliably prevented. (D) Since the fluidized drying passage is extremely short and is about 1/5 of the ventilation area of the conventional apparatus, the ventilation efficiency is significantly improved. (E) Since the feeding roll is continuously rotated, not only the flow state in the drying section is promoted, but also it is possible to shorten the time per circulation and perform high-speed drying. (F) Since the grains in the floating drying passage are constantly flowed in a floating state by the ventilation action of the drying wind from the lower part, the drying wind hits the whole grain surface to promote the heat receiving effect and to make the grains uniform. Can be dried. (G) Since the grains are transferred under a fluidized state in a thin-layer fluidized-drying passage, drying can be performed without generating a body cracking phenomenon even with a high-temperature (eg, 60 ° C. or more) dry air. As a result, the drying loss rate can be increased to 1.2% or more. (H) Despite being a two-layer type dryer, the entire lower portion was formed as a hot air chamber, so that the occurrence of drying unevenness and flow unevenness on the left and right could be prevented. (I) Since the configuration of the drying section is extremely simplified, an inexpensive grain dryer can be provided. (J) Since the flowing porous partition plate has a small opening ratio and allows the dry air to flow upward from below to under high-speed conditions,
It can be accurately distributed without causing clogging due to adhesion of sari particles or dust to the fluidized partition plate.

[Brief description of the drawings]

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying cylinder 2 Carriage gutter 5 Feeding roll 6 Flow partition 7 Blind partition 8 Housing 9 Hot air chamber 11 Suction exhaust chamber 12 Vertical sorting air path 13 Flow drying path 14 Outer wall 15 Vertical side wall 16 Bottom wall 17 Standing wall 18 Eddy flow Department

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-60171 (JP, A) JP-A-5-118760 (JP, A) Fully open 1979-64097 (JP, U) Really open 1985 106096 (JP, U) Actually open Showa 53-9656 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F26B 17/14

Claims (3)

(57) [Claims] 1. A left and right flow partition plate which is gently inclined toward a center discharge gutter on which a feeding roll continuously rotating inside a drying cylinder is accommodated, and a left and right blind partition which is steeply inclined toward the flow partition plate. The plate and the plate are partitioned so that an accommodation chamber is formed in the upper part and a hot air chamber is formed in the lower part, and a suction / exhaust chamber provided with vertical selection air passages on both the left and right sides is arranged in the accommodation chamber. A grain drying apparatus characterized in that a thin fluid drying passage having a thin and gentle slope is provided between the porous partition plate and the suction and exhaust chamber. 2. The vertical separation air passage is provided between a vertical side wall provided below the 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 drying equipment. 3. The left and right vertical walls are formed to be longer than the left and right standing walls, extend into the fluidized drying passage to form a swirling portion of the drying air inside the left and right vertical side walls, and suction air into the vertical sorting air passage. The grain drying device according to claim 1, wherein the side is connected to a vortex part.