JP2652428B2 - Grain drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is intended to efficiently and uniformly dry a grain by dry hot air flowing in the same direction as the grain flow, and at the same time, a large number of dusts contained in the grain. And a grain drying device capable of efficiently separating and removing the same.

[Prior art] Conventionally, in a drying passage, after passing a grain flow divided in the front-rear direction through the drying passage, the flow is changed in a left-right direction, that is, a so-called cross-flow method, whereby even high-moisture grains are uniformly and uniformly finished. A grain dryer that can be dried is described before the present application, for example, in Japanese Patent Publication No. 61-55037, the contents of which will be described with reference to FIG.

That is, the dryer main body 1 having a horizontally long rectangular tube shape long in the front-rear direction
A hot air blowing chamber 2 and a dust blowing chamber 3 are provided symmetrically on the left and right sides of the lower half of the inside, and a space between the hot air blowing chamber 2 and the dust blowing chamber 3 is directed in a direction orthogonal to the horizontal direction. A plurality of hot air chambers 4 communicating with the hot air blowing chamber 2 and a plurality of exhaust air chambers 5 communicating with the exhaust air chamber 3 are alternately installed so that a narrow drying passage 6 is formed between the two chambers 4, 5. The lower end of the plurality of drying passages 6 is provided with a plurality of cross-flow discharge chambers 8 formed by mountain-shaped partition walls 7 arranged in a plurality of rows along the horizontal direction just below the drying passages 6, the hot air chambers 4 and the exhaust air chambers 5. , And at the lower part of each cross-flow down-feeding chamber 8, a pay-out roll 9, which is mounted on a rotating shaft along the horizontal direction, and has a hot air blowing chamber 2, a dust-blowing chamber 3, and an intersection. It is configured so as to be viewed in a take-out chamber 10 surrounded by a down-flow delivery chamber 8.

[Problems to be Solved by the Invention] By the way, in this kind of conventional grain drying apparatus,
Grains flowing vertically along the drying passage formed between the hot air chamber and the exhaust air chamber are subjected to cross-flow drying, where they are dried by first being exposed to hot dry air circulating across the drying passage during the flowing process. When the grains fall into the lower cross-flow unloading chamber, the grains are deflected in the direction orthogonal to each other, so that the agitation and mixing are effectively performed, and the grains having different initial moisture values are circulated multiple times. It is designed to quickly dry to the desired moisture value by the flow action.

However, according to the above-described drying means, the grains vertically flowing down over the drying passage and the cross-flow discharge chamber are subjected to the cross-flow drying only once in the flow-down process.
Not only the drying efficiency is low, but also the grains on the blow side of the dry hot air are dried faster than the grains on the exhaust side of the dry hot air due to cross-flow drying, which causes uneven drying and cracking of the body, resulting in uniform drying. There is a problem that the drying cannot be equalized due to uneven flow due to the inability to efficiently sort out and remove a large amount of dust contained in grains during drying.

The present invention has been made in view of such problems of the related art, and the object thereof is to:
In the process in which the grain vertically flows down the drying passage, the process in which the grain flows vertically in the cross-flow delivery room which is deflected from the drying passage and vertically flows, and in the process in which the grain flows down in the removal room, the dry hot air is distributed in parallel with the flow of the grain. By this, in combination with the fact that the vertically flowing grains are agitated, it is possible to uniformly receive the dry hot air in substantially the entire process of the vertically flowing grains, and the grains can be dried evenly without drying unevenness. It is an object of the present invention to provide a grain drying apparatus that can efficiently sort and remove a lot of dust contained in a grain.

[Means for Solving the Problems] In order to achieve the above object, a grain drying apparatus according to the present invention comprises a hot air blower chamber and a dust exhaust wind along a horizontal direction on both left and right sides of a dryer body that is long in a front-rear direction. The hot air blower chamber is provided symmetrically, and between the hot air blower chamber and the dust blower chamber, one end is connected to the hot air blower chamber, and a plurality of rows of hot air blowout ducts each having a blowout window opened at the lower end are opposed to each other for drying. While forming a passage,
At the lower stage of the drying passage, there is provided a cross-flow discharge chamber in which a plurality of rows of grain distribution lower passages are formed in a direction intersecting with the drying passage, and the cross-flow discharge chamber is connected to the dust exhaust chamber via the lower extraction chamber. The dry hot air from the hot air chamber to the drying passage through the hot air jet duct, the cross-flow discharge chamber and the discharge chamber to the dust chamber is passed in parallel with the grains flowing down from the drying passage through the cross-flow discharge chamber to the discharge chamber. It is configured.

In addition, multiple rows of hot air guide ducts that guide the flow of hot air in the downflow direction of grains are stacked three-dimensionally along the left and right direction through a drying passage below the multiple rows of hot air jet ducts. It is.

Further, it is preferable that the dust discharge air passage and the discharge chamber are connected via a dust discharge passage formed between the main and substream plates constituting the discharge chamber.

[Operation] When the cereal to be dried is supplied into the main body of the dryer, the cereal is filled so as to fill all the drying passages as well as the feed chamber under the AC difference. Therefore, the filled grains are sequentially discharged by the feeding action, and at the same time, the dry hot air is blown into the hot air jet ducts in a plurality of rows, and at the same time, the cross-flow down feeding chamber and the discharge chamber are made to be in a negative pressure state.

Due to the negative pressure effect, the dry hot air is blown downwardly in the drying passage along the flow direction of the grain from the blow-out window opened at the lower end of the hot-air blow-off duct, so that the grain is evenly poured on the grain. And the dried hot air circulating along the drying passage in the same direction as the flowing direction of the grain flows through the cross-flowing delivery room by negative pressure while being guided by the hot air induction duct,
It is exhausted into the extraction room. Therefore, the first parallel flow drying is performed in the process in which the grain flows down to the cross-flow discharge chamber along the drying passage while being rectified by the action of the hot air blowing duct and the hot air guiding duct. When the grain falls into the cross-flow discharge chamber via the drying passage, the grain is deflected in a direction orthogonal to the drying passage by a plurality of rows of chevron-shaped porous partition walls arranged along the horizontal direction, and at the same time, the drying passage. The dry hot air flowing in parallel in the inside flows smoothly out of the cross-flow draw-out chamber toward the take-out chamber, and the second drying is performed by the dry hot air flowing downward while being effectively stirred and mixed. In the discharge chamber, the cereal discharged by the discharge operation is subjected to dry hot air sucked and circulated from the cross-flow discharge chamber through the discharge chamber to the exhaust air chamber to perform the third drying, and the cereal is simultaneously discharged. A large amount of dust is separated and sorted out by the exhausted hot air flowing from the extraction chamber through the exhaust passage to the exhaust air chamber, and the dust is concentrated and discharged outside the machine from the exhaust air chamber together with the exhausted hot air.

Therefore, even if the grain has a different desired moisture value, it can be efficiently dried by the circulation and circulation action of multiple times, or the dust in the grain can be selectively removed, causing uneven flow, drying unevenness, and body cracks. Dried grains of good quality can be easily obtained as well as being dried uniformly without any problem.

Embodiment An embodiment will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 101 denotes a dryer main body having a horizontally long rectangular tube shape that is long in the front-rear direction.
A hot air blower chamber 102 and a dust blower chamber 103 whose widths are sequentially increased from the upper part to the lower part are disposed symmetrically on the left and right sides of the lower half of the inside 101. A drying passage is provided between the hot-air blowing chamber 102 and the dust-blowing chamber 103, with one end connected to the hot-air blowing chamber 102, and a plurality of rows of hot-air blowing ducts 104 each having a lower end opening a blowing window 105. 107 and drying passage 107
In the lower stage, there is provided a cross-flow discharge chamber 108 forming a plurality of rows of grain distribution lower passages in a direction intersecting with the drying passage 107. The cross-flow discharge chamber 108 is connected to the exhaust air chamber 103 via a lower discharge chamber 113, and the drying passage 107, the cross-flow discharge chamber 108, and the discharge chamber 113 from the hot air chamber 102 through the hot air ejection duct 104. From the drying passage 107 through the cross-flow delivery chamber 108 to the grain flowing down to the extraction chamber 113. Reference numeral 106 denotes a plurality of rows of hot air induction ducts. The hot air induction duct 106 is a hot air jet duct through a drying passage 107.
It is laid three-dimensionally along the left and right direction so as to be staggered with respect to 104. The hot air induction duct 106 is formed in a mountain shape by a non-perforated plate, and at the same time, the lower end is released. Further, the above-mentioned cross-flow discharge chamber 108 is constituted by mountain-shaped porous partition walls 109 arranged in a plurality of rows along the horizontal direction, and the lower end of the drying passage 107 is connected to the cross-flow discharge chamber 108. is there. Reference numeral 110 denotes a conditioning tank, which is located above the drying passage 107 and connected to the drying passage 107.

Therefore, with the above-described configuration, the length of the hot-air blowing duct 104 and the length of the hot-air guiding duct 106 can be reduced, and at the same time, the number thereof is increased and the hot-air guiding duct 106 Even if the filling pressure of the filled grain is large, the hot air blowing duct 104 and the hot air guiding duct 106 do not bend, so that the durability can be increased, or the filling amount of the whole grain can be increased, as well as the blowing window. A rectifying operation can be performed in which the dry hot air jetted downward from the 105 in a direction parallel to the flowing direction of the grains is guided and circulated toward the cross-flow discharge chamber.

In addition, since a plurality of rows of cross-flow discharge chambers 108 are formed immediately below the hot air induction duct 106 and the drying passage 107,
After passing the flow of the cereal divided in the front and rear direction in the drying passage 107 through the drying passage 107, this time, the flow is changed in the left and right direction and crossed down, and the cereal is stirred and mixed, and at the same time, the flowability of the cereal is improved. In addition, uniform drying can be achieved without unevenness in drying and flowing down of grains. or,
Since the cereal that has been deflected down through the drying passage 107 is always filled in the cross-flow discharge chamber 108, the cereal passes through the drying passage 107 from the downward blow window 105 of the hot-air blowout duct 104, and passes through the cross-flow discharge chamber 108. It is evenly dried by being thoroughly immersed in the dry hot air flowing through it.

A feeding port 111 is opened in each valley of the chevron-shaped porous partition wall 109 along the horizontal direction, and a feeding roll 112 that is intermittently rotated is rotatably mounted on the feeding port 111.

Immediately below the cross-flow unloading chamber 108, an unloading chamber 113 for accommodating exhaust hot air and dried cereals after being subjected to drying,
Dried grains are attached to one side of the dryer main body 101 in a discharge gutter 115 which is formed by a pair of left and right mainstream grain plates 114, 114 obliquely inclined toward the center, and is disposed laterally at the lowest position of the unloading chamber 113. A transport screw 117 is rotatably mounted on a storage shaft for transport to a lower portion of the elevator 116.

In addition, at the lower part of one mainstream grain plate 114, the base end side is a discharge gutter 1
The sub-stream grain plate 118 attached to 15 is arranged so that a dust passage 119 is formed between the side stream grain plate 118 and the main stream grain plate 114, and the dust exhaust air chamber 103 and the extraction chamber 113 are connected.

Therefore, according to the above-described configuration, the cereal is dried in the passage.
In the course of circulation through 107, the first drying is performed, then the second drying is performed in the cross-flow discharge chamber 108, and the third drying is performed in the extraction chamber 113, and at the same time, the grain is dried. Exhausted hot air after drying serves to separate and remove dust.

On the front side of the hot air chamber 102 and on the back side of the exhaust air chamber 103, a burner device 120 containing a burner 121 inside and a suction exhaust device 122 containing a suction exhaust device 123 rotatably inside are placed side by side. , The burner device 120 and the hot air blower chamber 102,
The suction and exhaust device 122 and the exhaust air chamber 103 are connected to each other.

[Effects of the Invention] According to the present invention, the following effects can be obtained.

In the grain drying apparatus according to the first aspect, the grains are dried in a process of vertically flowing down a drying passage, a process of vertically flowing in a cross-flow delivery room that is deflected from the drying passage and vertically flows down, and a process of flowing down in a removal room. By flowing the hot air in parallel with the flow of the grains, the vertically flowing grains can be agitated in almost the entire process of the vertical flow, in combination with being stirred, and the grains can be uniformly dried. It is possible to dry uniformly and to efficiently remove a large amount of dust contained in the grain.

In the grain drying apparatus according to the second aspect, in addition to the above-described effects, since there is no exhaust duct in the drying unit, it is possible to increase the filling amount of the grain by that amount. Since all the operations are performed in the unloading room, the height of the dryer itself can be made lower,
The hot dry air can be accurately circulated in the same direction as the flowing direction of the grain to uniformly dry.

In the grain drying device according to the third aspect, the grains discharged into the take-out chamber by the negative pressure action in the dust exhaust chamber can be positively immersed in dry hot air to perform the third drying. Fortunately, the hot air that has been subjected to drying is taken out, circulated from the chamber through the dust passage to the dust air chamber, and the large amount of dust contained in the grain is sorted and separated, making it easy to clean and dry the grain. Obtainable.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a grain drying apparatus according to one embodiment of the present invention, FIG. 2 is a side elevational view of the essential part of the same, and FIG. 3 is a longitudinal sectional front view of a conventional example. 101: Dryer body, 102: Hot air blowing chamber, 103: Dust air chamber, 104: Hot air blowing duct, 105: Discharge window, 106
... Hot air induction duct, 107 ... Dry passage, 108 ... Cross-flow discharge room, 113 ... Extraction room, 114 ... Mainstream grain, 118 ...
… Secondary grain board, 119 …… Dust passage

Claims (3)

(57) [Claims] 1. A hot air blowing chamber and a dust blowing chamber are provided symmetrically along the horizontal direction on both left and right sides in a dryer body that is long in the front-rear direction, and a hot air blowing chamber and a dust blowing chamber are provided between the hot air blowing chamber and the dust blowing chamber. One end is connected to a hot air blowing chamber, and a plurality of rows of hot air blowing ducts each having a blowing window opened at the lower end thereof are opposed to each other to form a drying passage, and the drying passage is formed at a lower portion of the drying passage in a direction intersecting the drying passage. A cross-flow discharge chamber that forms a plurality of rows of grain distribution lower passages is provided, and the cross-flow discharge chamber is connected to a dust exhaust chamber through a lower extraction chamber, and a drying passage and an intersection are formed from the hot air chamber through a hot air ejection duct. A dry grain drying apparatus configured to flow dry hot air from the flow-down discharge chamber and the discharge chamber to the dust chamber in parallel with the grain flowing down from the drying passage through the cross-flow discharge chamber to the discharge chamber. 2. A plurality of rows of hot air guide ducts for guiding the flow of hot air in the flowing direction of the grains are provided below the plurality of rows of hot air jet ducts in a three-dimensional manner in a staggered manner through a drying passage. The grain drying device according to claim 1, which is provided. 3. The grain drying apparatus according to claim 1, wherein the exhaust air passage and the take-out chamber are connected via a dust exhaust passage formed between the main and substream grain plates constituting the take-out chamber.