JPH087353Y2 - Grain drying equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is capable of efficiently drying even high-moisture grains to finish moisture within a short time, and at the same time, a large amount of dust contained in grains. Whether the grain is sorted by the hot air that flows in the cross-feeding chamber to obtain dry grain that does not contain dust and that is of good quality, the grain has a uniform velocity regardless of whether it is on the hot air blowing chamber side or the dust blowing chamber side. The present invention relates to a grain drying device that can flow down in a dryer body.

[Prior Art] Conventionally, a grain having different initial moisture values is evenly distributed by a so-called cross-flow system in which a grain flow divided in the front-rear direction by a plurality of drying passages passes through the drying passage and then the flow is changed in the left-right direction. In addition to efficiently stirring and mixing, hot air is co-flowed laterally and downward to the grain flowing down to the unloading chamber through the drying passage and the cross-flow down-feeding chamber, and ventilation drying work is repeatedly performed, resulting in cracking of the barrel. Perhaps it is possible to achieve an efficient drying operation without the occurrence of dust, but using hot air to remove a large amount of dust contained in the grain in the take-out room to efficiently obtain dried wheat of good quality. Even if the dust sorting and drying operations are performed inside the room, the grains to be dried will stick to the draft plates through which the dust air flows and obstruct the downflow, or In order to prevent the flow from being blocked and to allow the grain to flow smoothly, the hot air blower chamber and the dust exhaust air are blown along the horizontal direction on both the left and right sides of the horizontal oblong rectangular dryer main body. The chamber is provided symmetrically, between the hot air blower chamber and the dust exhaust chamber, in the direction orthogonal to the horizontal direction, a hot air chamber leading to the hot air blower chamber and an exhaust air chamber leading to the dust blower chamber. In a structure in which a drying passage is alternately formed between both chambers, the lower ends of the plurality of drying passages are arranged in a plurality of rows along the lateral direction immediately below the drying passage, the hot air chamber and the exhaust air chamber. Connected to each of a plurality of cross-down flow feeding chambers partitioned by the bottomless ventilation partitioning body, the lower part of the cross-down flow feeding chamber faces a take-out chamber connected to the dust-exhaust air chamber as one wall ventilation plate, On the air flow plate, the tip side is opened inside the take-out room. , Grain dryer projecting every several intervals communicating pipe was allowed connecting proximally dust-exhaust air chamber is known as described before this application for example real-Open 1-136896 JP.

[Problems to be solved by the invention] By the way, in this type of conventional grain dryer, since the grain flowing down in the cross-flowing and feeding chamber along the hot air blowing chamber side and the dust blowing chamber side is not exposed to any hot air. , This will lead to the situation that the grain in this part is not dried.

Therefore, in order to uniformize and promote the drying by exposing all the grains flowing down in the cross-flow feeding chamber to uniform drying and at the same time, in order to wind-separate the dust contained in the grain in the cross-flow feeding chamber, When the cross-flow delivery chamber has a perforated plate on the surface in contact with the hot-air blower chamber and the dust-exhaust air chamber, the grains that flow down along the perforated plate on the hot-air blower chamber side cross-flow through the perforated plate from the hot-air blower chamber. It is smoothly flowed down along the perforated plate in a relation that it is pushed up by the wind pressure action of the hot air that is about to be pressed out toward the feeding chamber.

However, a suction / exhaust device is mounted on the rear side of the dust-exhaust chamber, and the inside of the dust-exhaust chamber is in a negative pressure state due to the suction action of the suction-exhaust device. The closer the suction / exhaust device is, the stronger the suction force is.Therefore, the grain that is trying to flow down on the perforated plate near the suction / exhaust device is attracted to the perforated plate surface by the strong suction force, which prevents the flow and is stagnant. Due to the stagnation phenomenon, there is a problem that the grain cannot be dried evenly because the grain does not flow evenly in the cross-feeding chamber as well as in the upper part of the grain, and it cannot flow down evenly on the left and right sides. Was there.

The present invention has been made in view of such problems of the conventional technique, and the purpose thereof is to, after passing through the drying passage a grain flow divided in the front-rear direction in the drying passage, Even if the fluidity of high-moisture grains is further improved by the cross-flow system that changes the flow in the left-right direction, in the process in which grains containing a large amount of dust flow down in the cross-flow feed chamber, the porosity from the cross-flow feed chamber is increased. Permit that it is possible to efficiently obtain a dry grain of good quality that does not contain dust by promoting drying while sorting air with a part of hot air that directly flows through the plate toward the exhaust air chamber. Grain that flows near the suction / exhaust device during the drying and dust sorting process is firmly attracted to the perforated plate due to the strong suction force, and it is surely prevented that the grain in this part will be stagnated, and the grain will always be even on the left and right. Flow It is intended to provide a grain drying apparatus capable of flowing down the cross flow down feed chamber with velocity.

[Means for Solving the Problems] In order to achieve the above object, a grain drying apparatus according to the present invention is provided with a hot air blower chamber and a dust exhaust chamber along the horizontal direction on the left and right sides of a horizontally long rectangular tube dryer main body. Is provided symmetrically, between the hot air blowing chamber and the dust exhaust chamber, in the direction orthogonal to the lateral direction, a hot air chamber leading to the hot air blowing chamber and a dust blowing chamber communicating with the dust blowing chamber. The drying passages are alternately installed between the two chambers, and the lower ends of the plurality of drying passages are respectively connected to a plurality of cross-down flow-feeding chambers partitioned by bottomless ventilation partition bodies arranged along the lateral direction. The lower part of the cross-down flow-out chamber faces the take-out chamber, and the cross-down flow-out chamber is formed with a perforated plate on the surface in contact with the hot air blowing chamber and the dust exhaust chamber.

Further, the perforated plate has a blind plate formed on the side close to the suction / exhaust device attached to one side of the dust-exhaust chamber to prevent the grain from being sucked.

[Operation] If the grain is now fed into the dryer main body, the grain is filled in the drying passage and the cross-flow down-feeding chamber, and further in the dryer main body higher than the drying passage, so that the plurality of hot air chambers and the exhaust air chamber as a whole are filled. If it is closed with cereals. When a predetermined amount of grain is filled as described above, the supply of the grain is stopped, hot air is generated in the hot air blowing chamber, and the inside of the dust exhaust air chamber is brought to a negative pressure state.

By the way, after the hot air blown in the hot air blowing chamber enters a plurality of hot air chambers from the hot air blowing chamber by negative pressure action,
A part of the hot air is discharged from the left and right sides across the drying passage to the air exhaust chamber, and the other hot air is jetted downward from the bottom toward the grains packed in the plurality of cross-down flow feeding chambers.
Then, a part of the hot air blown downward was circulated in the grain filled in the cross-flowing delivery chamber toward the bottomless ventilation partition, and then discharged into the delivery chamber, and further provided on one wall surface from the delivery chamber. It is sucked and distributed through the dust selection window into the dust exhaust chamber.

On the other hand, the other hot air blown downward into the cross-flowing feed chamber passes through the perforated plate provided at the boundary between the cross-flow feeding chamber and the dust-exhaust air chamber into the dust-exhaust chamber by the suction action of the suction / exhaust device. After being sucked, while being exhausted to the outside of the machine by the suction and exhaust device, a part of the hot air filled in the hot air blowing chamber is squeezed out from the porous plate provided at the position facing the hot air blowing chamber side, Due to this wind pressure action, the grain flowed down along the perforated plate is smoothly flowed down while being pushed up into the cross flow-down feeding chamber.

By the way, since the perforated plate provided on the dust exhaust chamber side is formed in a blind shape on the side close to the suction / exhaust device, even when the hot air is exhausted as described above, it is strong by the intake / exhaust device. Since the suction force is not applied, the falling grain is smoothly flowed without sticking to the perforated plate surface.

Therefore, it is permissible that the grain in the cross-flow delivery chamber is uniformly dried by the hot air flowing in the process in which the hot air blower chamber side and the dust exhaust chamber side flow down at a uniform downflow rate, or the dust contained in the grain is also allowed. Dust is removed by the wind sorting action.
Therefore, the grain filled in the dryer main body by the feeding operation is first divided into a plurality of rows of hot air chambers and exhaust air chambers, enters the drying passage in the front-rear direction, and is then vertically flowed down in the drying passage. The grain after being subjected to the primary drying by being exposed to the hot air flowing in, and flowing through the drying passage, has a so-called cross-flow condition in which the flow changes to the left and right due to the bottomless ventilation partition, and the grain flows down in the cross-flow feed chamber. After that, the hot air that flows from the bottom of the hot air chamber to the extraction chamber through the bottomless ventilation partition, the hot air that flows from the bottom of the hot air chamber to the dust exhaust chamber through the perforated plate, and the hot air blowing chamber through the perforated plate. At the same time, the hot air that has been extruded into the cross-flowing feeding chamber is subjected to secondary drying, and at the same time dust is removed by the air sorting action. Furthermore, the grain discharged into the feeding chamber by the feeding action does not flow through the bottom without passing through. The hot air that flows from the partition through the take-out chamber and the dust selection window to the dust-exhaust chamber is subjected to the third drying, and at the same time, the dust contained in the grain is exhausted from the take-out chamber through the dust selection window. After the air is sorted by the hot dust exhausted toward the room, it is discharged to the outside of the machine, and only the grain is circulated back to the dryer body through the discharge gutter, so even if it is a high-moisture grain. It is possible to obtain a high-quality dry grain free from dust at the same time as being uniformly dried without causing unevenness in drying, cracking in the barrel, and unevenness in flowing down by the ventilation drying operation performed a plurality of times.

[Examples] Examples will be described with reference to the drawings.

1 to 3, reference numeral 1 denotes a dryer main body having a horizontally long rectangular tube shape that is long in the front-rear direction. The dryer main body 1 has a hot air blower chamber 2 and a ventilation chamber 2 on both left and right sides in the horizontal direction. The dust chamber 3 is provided so as to face the dust chamber 3.

At the upper position of the space between the hot air blowing chamber 2 and the dust blowing chamber 3, one side is connected to the hot air blowing chamber 2 and the blowing window 5 in a direction orthogonal to the lateral direction, and has a stopper shape. A plurality of hot air chambers 4 and a plurality of front-end-shaped air exhaust chambers 6 which are connected to the dust exhaust air chamber 3 through the air exhaust window 7 on one side are dried between the hot air chambers 4 and the air exhaust chambers 6. The passages 8 are alternately arranged so that the upper end side of the drying passage 8 is connected to the tempering tank 9, and the lower end side of the drying passage 8 is directly below the hot air chamber 4 and the exhaust air chamber 6 along the lateral direction. It is connected to a plurality of intersecting downflow feeding chambers 10 formed by bottomless ventilation partitions 11 each having a mountain shape and arranged in a plurality of rows. In addition, the above-mentioned hot air chamber 4 forms a ventilation surface on both left and right sides, and can open the bottom to blow out the hot air introduced into the hot air chamber 4 in the left and right lateral directions and downward. Exhaust chamber 6
Open the bottom of the drying passage 8
The hot air that has traversed is introduced into the dust blast chamber 3 by the negative pressure action.

Therefore, the hot air blown into the hot air chamber 4 is divided into two parts, one is circulated across the drying passage 8 and the other is blown downward so as to be parallel with the flow direction of the grain, so that the grain is blown out in this portion. Permitting it to be possible to dry by ventilation twice in the above, the hot air blown downward is circulated from the bottomless ventilation partition body 11 through the cross-flow downflow chamber 10 toward the extraction chamber 14 described later, and at the same time, the perforated plate 21, twenty two
Through the flow path toward the dust-exhaust chamber 3 to efficiently dry the grain filled in the cross-flowing-down feeding chamber 10.

A delivery port 12 is opened in each of the valleys of the bottomless ventilation partition 11 along the lateral direction, and a delivery roll 13 that is intermittently rotated is rotatably mounted at the position of the delivery port 12. At the lower part of the cross-down flow-out chamber 10, a hot air blowing chamber 2, a dust-exhaust chamber 3, a cross-down flow-out chamber 10 and a take-out chamber 14 surrounded by front and rear wall plates of the dryer main body 1 are arranged. A dust selection window 15 is opened on one wall surface that forms a boundary between the take-out chamber 14 and the dust-exhaust chamber 3 to connect the take-out chamber 14 and the dust-exhaust chamber 3.

At the center of the bottom of the take-out chamber 14, there is a discharge gutter along the horizontal direction.
16 is installed sideways, and a unloading screw that can rotate freely inside
17 is laid horizontally, and one end of the carry-out gutter 16 is connected to the lower part of an elevator 18 standing on one side of the dryer main body 1, and
Although not shown, the upper part of the elevator 18 is connected to a carry-in gutter provided horizontally on the top of the dryer main body 1.

Reference numeral 19 denotes a hot air generating device arranged on the front side of the hot air blowing chamber 2, and 20 denotes a suction air discharging device arranged on the rear surface side of the dust blowing chamber 3, which is the hot air blowing chamber 2 Is a hot air generator
19, and the dust exhaust air chamber 3 is connected to the suction air exhaust device 20, respectively. The above-mentioned cross-flowing delivery chamber 10 is the hot air blowing chamber 2
The surface contacting the dust exhaust chamber 3 is formed by the perforated plates 21 and 22, and a part of the perforated plate 22 provided on the dust exhaust chamber 3 side,
That is, the portion near the intake side of the suction / exhaust device 20 is covered by the blind plate 23.
In order to prevent a part of the grain flowing down along the perforated plate 22 in the cross-down feed-out chamber 10 from being sucked by the suction force of the suction / exhaust device 20, and the flow down being stagnated.

[Advantages of the Invention] Since the present invention is configured as described above, it has the following effects.

Even if the area of the drying passage is as large as possible, even if the amount of heat generated is the same, a large amount of dry hot air can be supplied to the hot air chamber with little air loss to improve the drying capacity. When flowing down the drying passage and the cross-flow down-feeding chamber, the grain flow can be changed to a cross shape to improve the flowability of the grain, and the hot air blown out from the bottom of the hot air chamber can flow down the grain. In the process of the grain flowing downward in the cross-feeding chamber, the hot air is passed downward through the perforated plate and the hot air that is pressed in from the hot air blowing chamber, and is directed toward the dust exhaust chamber through the perforated plate. Not only can the grain be dried many times by the circulating hot air, the grain can be efficiently dried without causing uneven drying or a cracking phenomenon, but the grain can be dried by using the hot air that has been dried. Contained in Dust and wind screened in a cross flow down feed chamber can be obtained quality good drying grain.

Further, in the present invention, since the perforated plate provided on the dust exhaust chamber side is formed as a blind plate on the side close to the suction and exhaust device, it cross-flows along the dust exhaust chamber side and flows down in the chamber. It is possible to prevent grain from adhering to the surface of the perforated plate by the suction force of the suction / exhaust device to prevent the flow down and stagnant, and to allow the grain to flow smoothly. It is squeezed out toward the cross-flowing feed chamber and the grain pressure is pushed up by this wind pressure action to allow the grain to flow down smoothly.Therefore, the grain is flowed down in the cross-flowing feed chamber at a uniform flow velocity without causing uneven flow-down, Uniform dried grains can be quickly obtained.

[Brief description of drawings]

FIG. 1 is a front view in vertical section with a part cut away, and FIG. 2 is FIG. 1A.
-A side sectional view taken along line A-A, and FIG. 3 is a front sectional view taken along line B-B shown in FIG. 1 ... Dryer main body, 2 ... Hot air blowing chamber, 3 ... Dust blowing chamber, 4 ...
Hot air chamber, 6 ... Exhaust chamber, 8 ... Drying passage, 10 ... Cross-flow delivery chamber, 11 ... Bottomless ventilation partition, 20 ... Suction / exhaust device, 21, 2
2 ... perforated plate, 23 ... blind plate

Claims (2)

[Scope of utility model registration request] 1. A hot-air blowing chamber and a dust-exhaust chamber are provided symmetrically along the transverse direction on both right and left sides of a horizontally-long rectangular dryer main body, and between the hot-air blowing chamber and the dust-exhaust chamber. , In a direction orthogonal to the lateral direction, the hot air chambers communicating with the hot air blowing chamber and the dust exhaust chambers communicating with the dust exhaust chamber are alternately installed so that a drying passage is formed between the chambers, The lower end of the drying passage is respectively connected to a plurality of cross-down flow-out delivery chambers partitioned by bottomless ventilation partitions arranged along the lateral direction, and the lower part of the cross-down flow-out delivery chamber faces the take-out chamber. A grain drying device in which the surface of the crossflow delivery chamber that contacts the hot air blowing chamber and the dust exhaust chamber is formed as a perforated plate. 2. The grain drying device according to claim 1, wherein the perforated plate has a blind plate on the side close to the suction and exhaust device arranged on one side of the dust exhaust chamber.