JPH0648304Y2 - Grain dryer - Google Patents

Description

[Detailed Description of the Invention] "Industrial field of application" The present invention includes a large amount of grains such as high-moisture grains such as wheat, which can be dried to a finish moisture value in a short time. The dust is filtered by the hot air flowing through it to obtain dry grains of good quality that do not contain dust. The present invention relates to a grain dryer capable of preventing sticking on a draft plate by exhaust hot air flowing toward a room and allowing grains to flow smoothly along the draft plate.

“Conventional technology” Conventionally, in a drying passage, the flow of grains separated in the front-back direction is passed through the drying passage, and then the flow is changed to the left-right direction. A grain dryer capable of uniformly finishing and drying even high-moisture grains with high quality is described in, for example, Japanese Patent Publication No. 61-55037 before this application, and the content thereof will be described with reference to FIG. That is, the hot air blower chambers 2 and the dust exhaust air chambers 3 are symmetrically provided on the left and right sides of the lower half of the dryer main body 1 in the shape of a horizontally long rectangular cylinder that is long in the front-rear direction, and the hot air blower chambers 2 and the dust exhaust air chambers are provided. Between 3 and the direction orthogonal to the horizontal direction,
A plurality of hot air chambers 4 communicating with the hot air blower chamber 2 and a plurality of air exhaust chambers 5 communicating with the dust exhaust air chamber 3 are provided between the chambers 4 and 5, and a narrow drying passage 6 is provided therebetween.
So as to be formed, and the lower ends of the plurality of drying passages 6 are provided at the lower ends of the drying passages 6, the hot air chamber 4 and the exhaust air chamber 5 in a row in the lateral direction in a blind mountain-shaped partition. A plurality of cross-feeding chambers 8 formed by the walls 7 are connected to the cross-feeding chambers 8 ...
Is constituted by facing the take-out chamber 10 surrounded by the hot-air blowing chamber 2, the dust-exhausting air chamber 3 and the cross-flowing-out feeding chamber 8.

"Problems to be solved by the device" By the way, when wheat with a moisture content higher than that of paddy is dried by this type of grain dryer, the wheat passing through the drying passage is directed from the hot air chamber to the exhaust chamber. Since it was only dried once by hot air flowing across the drying passage, the drying speed was slow and the drying time was long. The wheat facing the side is hardly dried. Therefore, when high-temperature hot air was circulated in an attempt to increase the drying speed, many cracking phenomena occurred and grain damage was often caused by drying.

Moreover, when wheat is dried, the grain contains a large amount of dust, and if this is not removed quickly, the dust mixing action will cause the dried grain to cross over accurately. Perhaps it will not flow down while maintaining the condition, but it will cause uneven flow-down phenomenon, and it will not be possible to finish high-moisture wheat evenly and with good quality and speed up the drying speed to dry it.

However, in the above-mentioned known grain dryer, a means for removing dust is adopted in the process in which the wheat to be dried flows down while being sequentially dried in the dryer main body in a crossing state and then discharged into the unloading chamber. Therefore, a large number of members are inevitably required to remove dust, and the structure is complicated.

The present invention has been made in view of the above problems of the conventional technique, and the purpose thereof is to pass the grain flow divided in the front-rear direction by a plurality of drying passages through the drying passages. After that, by a so-called cross-flow method in which the flow changes in the left-right direction, the grains having different initial moisture values are uniformly and efficiently mixed with stirring, and the grain that flows down to the unloading chamber through the drying passage and the cross-flowing feeding chamber, Allow hot air to flow laterally and downward in parallel and perform ventilation drying several times to achieve high-efficiency drying without cracks in the barrel. A large amount of dust that has been removed can be removed efficiently to obtain dry wheat of good quality, and even when the dust sorting and drying operations are performed in the room, the grains to be dried do not emit dust. That to be blocking the flow of circulation ventilating flow interfere or or clean room air to flow down stuck to Kokuban was prevented, it is intended to provide a grain dryer grain smoothly flow.

[Means for Solving the Problems] In order to achieve the above object, the grain dryer according to the present invention is provided with a hot air blower chamber and an exhaust fan along the horizontal direction on both left and right sides of a horizontally long rectangular cylindrical dryer main body which is long in the front-rear direction. A dust air chamber is provided symmetrically, and a hot air chamber communicating with the hot air blowing chamber and an air exhaust chamber communicating with the dust air chamber are provided between the hot air blowing chamber and the dust exhaust chamber in a direction orthogonal to the lateral direction. In such a manner that a drying passage is alternately formed between the two chambers, the lower ends of the plurality of drying passages extend in a row in 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-out delivery chambers partitioned by bottomless ventilation partitions, and the lower part of the cross-down flow-out delivery chamber faces a take-out chamber connected to the dust-exhaust air chamber as a ventilation plate on one wall. Along with the draft plate, the tip side is taken out and opened in the chamber. In this structure, communication pipes having a triangular cross section whose base end side is connected to the dust exhaust chamber are provided at a plurality of intervals.

[Operation] Now, if grains and wheat are supplied into the dryer main body, the grains are filled in the dryer passage and the cross-flow downflow chamber and the dryer main body higher than the drying passage, and the hot air chamber and the exhaust air chamber are provided. If the whole is blocked by grains, it is closed. 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 dust exhaust chamber is made negative pressure.

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 blows across the drying passage from the left and right sides and is discharged to the exhaust chamber. At the same time, other hot air is jetted downward from the bottom toward the grains filled in the plurality of cross-flowing feed chambers. Then, a part of the hot air blown downward is circulated through the grain filled in the cross-flow downflow chamber toward the bottomless ventilation partition, and then discharged into the extraction chamber, and then the ventilation flow provided on one wall from the extraction chamber. It is sucked and distributed through the ventilation surface of the grain board into the dust exhaust chamber.

Therefore, the grain filled in the dryer main body by the feeding action is first divided into the hot air chambers and the exhaust air chambers in a plurality of rows, enters the drying passage in the front-rear direction, and is then vertically flowed down in the drying passage. After being dried by being exposed to the hot air flowing through the grain, and then passing through the drying passage, the grains flow down and are accumulated in the crossflow downflow chamber while exhibiting a so-called crossflow state in which the flow changes to the left and right due to the bottomless ventilation partition. Grains discharged from the bottom of the chamber through the bottomless ventilation partition to the unloading chamber are dried by the hot air flowing through the bottomless ventilation partition, and then discharged into the unloading chamber by the feeding action. Dust contained in a large amount of dust in the grain at the same time as being dried by being exposed to the hot air that flows through the air flow grain plate toward the dust exhaust chamber, and the dust hot air that flows through the air flow grain plate toward the dust exhaust chamber. To After being wind sorting only grains while being discharged outside the return circulation back to the dryer body through the discharge trough flowed Ri.

Therefore, when the grain flows down the drying passage, the flow direction of the grain is changed to the orthogonal direction when it falls into the cross-flow feeding chamber. Efficiently agitating and mixing, even high moisture content grains are dried uniformly by the ventilation drying action multiple times without causing uneven drying and cracking of the grains, and at the same time, the flowability of grains due to the cross-flowing state. Is also improved, and evenly flowing down without causing uneven flow.

Therefore, in order to accelerate the drying speed, it is possible to dry without causing any adverse effect even if high temperature and a large amount of hot dry air are used. By the way, when a large amount of dry hot air is used to accelerate the drying speed, a large amount of exhaust hot air is also discharged into the extraction chamber. As a result, a part of the grain flowing down along the draft air flow plate adheres to the draft air flow plate surface due to the wind pressure action of the exhaust hot air, and the draft surface is blocked or the ventilation surface is blocked to prevent the exhaust heat air from flowing. Cause a situation that hinders distribution.

However, in the present invention, on the ventilated flow grain board, communication pipes having a triangular cross-section with the tip end side open to the extraction chamber and the base end side connected to the dust blast chamber are provided at plural intervals. Therefore, a part of the exhaust hot air discharged into the extraction chamber is exhausted directly to the dust exhaust air chamber through the communication pipe, and the amount of exhaust hot air passing through the ventilation surface of the ventilation plate can be reduced. As a result, the above-mentioned drawbacks can be eliminated, grains can be smoothly flowed down, and a good drying operation can be easily achieved.

[Example] An example will be described with reference to the drawings.

In FIG. 1 to FIG. 3, 101 is a dryer main body having a horizontally long rectangular tube shape that is long in the front-rear direction.
A hot-air blowing chamber 102 and a dust-exhausting air chamber 103 are provided facing each other on both left and right sides in the lateral direction.

And, in the space upper position between the hot air blowing chamber 102 and the dust blowing chamber 103, in the direction orthogonal to the lateral direction, one side of the hot air blowing chamber 102 and the blowing window 105 of the stopper shape. Multiple hot air chambers 104, dust exhaust air chamber 103 and exhaust window 10 on one side
The exhaust chamber 106 composed of a plurality of stoppers connected via 7
Alternately installed so that a drying passage 108 is formed between the hot air chamber 104 and the exhaust air chamber 106, the upper end side of the drying passage 108 is connected to the tempering tank 109, and the lower end side thereof is the hot air chamber. 1
It is connected to a plurality of cross-down flow delivery chambers 110 formed by bottomless ventilation partition bodies 111 having a mountain shape and arranged in a plurality of rows along the lateral direction immediately below 04 and the air exhaust chamber 106. The above-mentioned hot air chamber 104 has ventilation surfaces on both left and right sides, and the bottom is opened so that the hot air sent into the hot air chamber 104 can be jetted in the left and right lateral directions and downward. The bottom of the chamber 106 is opened, and hot dry air that has traversed the drying passage 108 is introduced as a ventilation surface on both left and right sides, and this is exhausted to the dust exhaust chamber 103 by a negative pressure action.

Therefore, the dry hot air blown into the hot air chamber 104 is divided into two, one is circulated across the drying passage 108, and the other is blown downward so as to be parallel with the flow direction of the grain, so that the grain is Permitting it to be possible to dry with ventilation twice in the part, the dry hot air jetted downward is circulated through the cross-flow downflow chamber 110 into the take-out chamber 114, which will be described later, from the bottomless ventilation partition 111, and the cross-flow downflow chamber Dry the grains filled in 110.

At each trough of the bottomless ventilation partition 111, a feeding port 112 is opened along the lateral direction, and an intermittently feeding feeding roll 113 is rotatably mounted at the position of the feeding port 112. At the lower part of the cross-down flow-out chamber 110, a take-out chamber 114 surrounded by the hot air blowing chamber 102, the dust-exhaust air chamber 103, the cross-down flow-out chamber 110 and the front and rear wall plates of the dryer main body 101 is arranged and taken out. One wall surface that forms a boundary between the chamber 114 and the dust-exhaust chamber 103 is formed on the air flow grain board 115 to connect the take-out chamber 114 and the dust-exhaust chamber 103.

At the center of the bottom of the take-out chamber 114, along the horizontal direction
61 is laterally installed, and the unloading screw is rotatable inside
117 is placed horizontally, and one end of the carry-out gutter 116 is attached to the dryer main body 101.
While being connected to the lower part of the elevator 118 standing on one side, the upper part of the elevator 118 is connected to a carry-in gutter provided on the top of the dryer main body 101 (not shown). Reference numeral 119 is a hot air generator provided on the front side of the hot air blowing chamber 102, and 120
Is a suction / exhaust device arranged on the rear surface side of the dust exhaust chamber 103, wherein the hot air blowing chamber 102 is connected to a hot air generating device 119, and the dust air chamber 103 is connected to a suction / exhaust device 120. ing. 121
Is a communication having a triangular cross-section mounted on the draft plate 115 so that the tip end side is opened into the take-out chamber 114 and the base end side is connected to the dust-exhaust chamber 103 so as to project at a plurality of intervals. Even if the amount of dry hot air exhausted into the take-out chamber 114 by the plurality of communication pipes 121 is large, a part of the dry hot air is exhausted directly to the dust exhaust air chamber 103. By reducing the amount of air passing through the ventilation surface of the ventilation grain board 115, it is possible to prevent the dried grain flowing down from being adsorbed on the ventilation grain board 115.

"Effect of Invention" Since the present invention is configured as described above, it has the following effects.

It is possible to increase the drying capacity by increasing the area of the drying passage as much as possible and supplying a large amount of dry hot air into the hot air chamber with little air loss even if the amount of heat generated is the same.
When the grain flows down the drying passage and the cross-flow down-feeding chamber, the flow of the grain is changed to a cross shape to improve the flowability of the grain, and it is possible to prevent the uneven flow of the grain and to prevent the hot air from flowing. The dry hot air blown out from the bottom of the chamber is circulated so as to be parallel to the direction of grain flow, so that the grain is not only dried by the dry hot air flowing downward in the course of the drying passage and the cross-flow feeding chamber and the take-out chamber. It can be dried many times, and the grain can be dried at a high rate without causing uneven drying and cracking of the grain. Not only can a large amount of contained dust be taken out of the air in the extraction room to obtain dried grains of good quality, but even if a large amount of dry hot air is used to accelerate the drying speed, Exhausted A portion of the dry hot air is exhausted directly to the dust blast chamber by multiple communication pipes, reducing the amount of air that passes through the ventilation surface of the draft plate, and a portion of the dry grain that is in the downflow state is drafted by wind pressure. It is possible to prevent it from being adsorbed on the grain board and to always flow smoothly. Further, there is an effect that dust can be positively discharged to the dust exhaust air chamber through the plurality of communication pipes.

[Brief description of drawings]

1 is a partially cutaway vertical front view, FIG. 2 is a partially cutaway side view, and FIG. 3 is a partially cutaway side view, and FIG. 3 is a partially cutaway and partially cutaway view. FIG. 4 is a perspective view of a main part, and FIG. 4 is a vertical sectional front view of a conventional example. 101 ... dryer main body, 102 ... hot air blowing chamber, 103 ... dust exhaust chamber, 104 ... hot air chamber, 106 ... exhaust air chamber, 108 ... drying passage, 110 ... cross-flowing delivery chamber, 111 ...... Bottomless ventilation partition, 114 …… Take-out room, 115 …… Ventilation plate, 121 …… Communication pipe

Claims (1)

[Scope of utility model registration request] 1. A hot air blower chamber and a dust exhaust air chamber are provided symmetrically along the horizontal direction on both left and right sides of a horizontally long rectangular tube-shaped dryer main body, and the hot air blower chamber and the dust exhaust air chamber are provided. Between the hot air blowing chamber and the dust exhaust chamber, which are arranged alternately in a direction orthogonal to the horizontal direction between the two, so that a drying passage is formed between them. The lower ends of the plurality of drying passages are respectively connected to a plurality of cross-down flow-out feeding chambers partitioned by bottomless ventilation partitioning bodies arranged in a plurality of rows along the lateral direction immediately below the drying passage, the hot air chamber and the exhaust air chamber. The lower part of the cross-flowing feeding chamber faces a take-out chamber connected to the dust-exhaust air chamber as a ventilation flow grain plate on one wall, and the tip side is opened into the taking-out chamber on the ventilation flow grain plate, and the base end. Grain with connecting pipes protruding from the dust exhaust chamber at multiple intervals.燥機.