JP2002048471A - Grain drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve energy-saving effects by efficiently generating far infrared rays in a grain drier, moreover reducing the generation of the combustion noise of a burner and furthermore allowing a far infrared radiator to be incorporated in the small-sized grain drier easily. SOLUTION: The inside of a hot air path is provided with a far infrared radiator with a combustion path having one end side communicating with a burner and the other end side extending to an exhauster side and containing a combustion chamber formed, and moreover the outer surface of this far infrared radiator is provided with a plurality of opening parts allowing the hot air from the combustion path to flow into the hot air path.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain dryer, in particular, to reduce the size of the dryer itself, to increase the energy saving effect, to reduce the generation of burner combustion noise, and to reduce the cost. Related to grain dryer.

[0002]

2. Description of the Related Art Grain dryers for drying grains such as rice and wheat are used for drying grains such as rice and barley in a paddy state before milling, and there are circulation type and flat type grain dryers. .

In a circulation type grain dryer, an upper storage section, a middle drying section, and a lower grain collecting section are provided in a dryer body that is long in the front-rear direction, and the drying section is partitioned by a ventilation member to store the grains. A portion and a grain collecting portion are connected, and two flow passages extending in the front-rear direction are provided, and a hot air passage separated by the ventilation member and extending in the front-rear direction is provided between the two flow passages,
A burner is provided on the front side of the dryer body in the drying section, and an exhaust fan is provided on the rear side of the dryer body.The upper stage storage is conducted after the grain is led from the upper storage unit to the lower stage collecting unit via the middle drying unit. In the drying section, the grains are dried by hot air, far-infrared rays or the like while being circulated back to the section.

[0004] As shown in FIG. 8, a drying mechanism 102 of the grain dryer is provided with a combustion mechanism 104. The combustion mechanism 104 includes a burner 106 and a combustion chamber forming wall 112 that forms a combustion chamber 108 and has an opening 110. This combustion mechanism 10
In FIG. 4, the combustion flame from the burner 106
The hot air in the combustion chamber 108 flows into the hot air passage 114 from the opening 110.

[0005] As such a grain dryer, for example,
It is disclosed in JP-A-9-61055. In this publication, a grain flow passage communicating with a dry grain storage chamber on the upper half side of the machine is provided in the lower half of the machine with a pair of air-permeable partitions, and the front of the machine body is provided on one side of the grain flow path. A far-infrared radiator that emits far-infrared light and a far-infrared radiator that provides a hot air chamber connected to the burner on the side And an exhaust pipe whose base end is connected to the distal end of the exhaust pipe and whose opening at the distal end opens in the vicinity of the outside air introducing section is provided in the hot air path.

[0006]

However, in a grain dryer provided with a far-infrared radiator disclosed in the above-mentioned publication, a far-infrared radiator that emits far-infrared rays is provided in a hot air path, Since the exhaust pipe that returns the hot air in the radiator to the vicinity of the outside air introduction section is provided, and the far-infrared radiator and the exhaust pipe are incorporated in the hot air path, it is necessary to provide a large-capacity hot air path. And the incorporation into a small grain dryer becomes difficult.

[0007] Further, when the far-infrared radiator and the exhaust pipe are to be incorporated in the hot air passage of a small grain dryer, the far-infrared radiator must be made small in diameter, so that the energy by the far-infrared ray is reduced. There is a disadvantage that the effective use of the fuel is impaired and the energy saving effect is reduced.

Further, in the combustion mechanism 104 shown in FIG. 8, after the combustion flame is injected into the combustion chamber 108, the hot air immediately flows from the opening 110 to the hot air passage 114, so that a burner combustion noise is generated. There was an inconvenience.

[0009]

In order to eliminate the above-mentioned disadvantages, the present invention provides an upper storage unit, a middle drying unit, and a lower collecting unit in a dryer body that is long in the front-rear direction. Two flow passages are provided in the drying section, which are separated by a ventilation member, communicate the storage section and the grain collecting section, and extend in the front-rear direction, and are separated by the ventilation member between the two flow passages. To provide a hot air path that extends in the front-rear direction,
In a grain dryer in which a burner is provided on a front side of a dryer main body of the drying unit and an exhaust fan is provided on a rear side of the dryer main body, one end of the hot air path is connected to the burner and the other end is an exhaust fan. A far-infrared radiator extending to the side to form a combustion passage including a combustion chamber, and a plurality of openings for allowing hot air in the combustion passage to flow into the hot air passage are provided on an outer surface of the far-infrared radiator. Features.

[0010]

According to the present invention, a far-infrared radiator is provided in a hot air passage, one end of which communicates with a burner and the other end of which extends toward an exhaust fan to form a combustion passage including a combustion chamber. Since there are multiple openings on the outer surface of the infrared radiator that allow hot air from the combustion passage to flow into the hot air passage,
When the combustion flame from the burner is injected into the burner side of the combustion passage that has a large length formed in the far-infrared radiator, the heat of the combustion flame heats the far-infrared radiator, and this far-infrared radiator is heated. Generates far-infrared rays, radiates the far-infrared rays to the grains, and the hot air that has flowed into the hot air path from the combustion passage through the opening mixes with the outside air sucked by the exhaust fan to form hot air and passes through the grain path. And dry the grain. Thereby, far-infrared ray is efficiently generated by the far-infrared radiator extending from the burner side to the exhaust fan side, the grain is warmed from the inside by the far-infrared ray, and the drying of the grain is promoted, and the energy saving effect is improved. Since the combustion passage including the combustion chamber is formed long in the front-rear direction of the dryer body, the generation of burner combustion noise can be reduced.Furthermore, the far-infrared radiator has a simple shape, so the far-infrared radiator can be used. It can be easily incorporated into a small grain dryer, and the grain dryer can be reduced in size and inexpensive.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 to 4 show a first embodiment of the present invention. 3 and 4, reference numeral 2 denotes a circulation type grain dryer, and reference numeral 4 denotes a dryer main body. The dryer main body 4 includes an upper section 6 and a lower section 8. The upper portion 6 includes an upper front plate 10, an upper rear plate 12, an upper side plate 14, and an upper top plate 1.
6 form a rectangular box with a closed bottom and a long bottom in the front-rear direction. The lower portion 8 includes a lower front plate 18 and a lower rear plate 20.
The lower side plate 22 and the lower bottom plate 24 form a rectangular box with no cover and a long bottom in the front-rear direction.

The grain dryer 2 has a storage section 26 in the upper section 6.
And a drying section 28 and a grain collecting section 30 in the lower section 8.
By connecting the upper step 6 with a closed boxless bottomed box and the lower step 8 with a closed boxless bottomed box to communicate the inside, the dryer body 4 long in the front-rear direction is formed. . Thereby, the grain dryer 2 includes, in the dryer body 4, a storage section 26 into which grains are sequentially input, a drying section 28 to dry grains, and a grain collecting section 30 to collect dried grains, from the top. Is provided.

The grain dryer 2 is provided with a fryer 32 on the upper front plate 10 and lower front plate 18 side of the dryer main body 4, and communicates with the upper top plate 16 above the storage section 26 to the upper part of the fryer 32. The upper conveying means 34 is provided, and the
A lower conveying means 36 connected to the lower part is provided, and the drying unit 28
The lower side plate 22 on one side is provided with a filling port 38 communicating with the grain collecting section 30, and a filling hopper 40 for opening and closing the filling port 38 is provided.

The grain dryer 2 lifts up the grain stuck from the insertion port 38 by the graining machine 32, drops it evenly into the storage section 26 by the upper conveying means 34, and dries it in the drying section 28. It is collected in the grain collecting section 30, and the lower conveying means 3
The drying of the cereal is repeated by repeating the circulation of transporting to the lower part of the hoisting machine 32 and lifting again by 6.

As shown in FIG. 2, the grain dryer 2 is provided with a storage chamber 42 for storing grains that are equally dropped by the upper conveying means 34 in the storage section 26. Further, the grain dryer 2 is partitioned into a drying section 28 by a gas-permeable ventilation member 44 formed of a perforated plate, a mesh member, or the like, and connects the storage section 26 and the grain collection section 30 with each other. There are provided two flow channels 46 extending in the front-rear direction.

The ventilation member 44 comprises two outer ventilation members 44a, 44a and inner ventilation members 44b, 44b, respectively. The two outer ventilation members 44a, 44a
Are arranged so as to be narrowed toward the upper part of the center of the grain collecting unit 30 from the upper end sides. Two inner ventilation members 44
The b and 44b are expanded so as to be directed sideways from the vicinity of the center of the upper end of the drying unit 28, and are bent so as to be narrowed downward at the center at the intermediate position, and are joined at the lower center of the drying unit 28. It is arranged to be.

As a result, the upper end of the drying section 28 is provided between one of the outer ventilation members 44a and the inner ventilation member 44b disposed close to each other and between the other outer and inner ventilation members 44a and 44b. Two flow passages 46, 46 opening to the storage part 26 and opening at the lower end to the grain collecting part 30 are provided symmetrically.

At the openings at the lower ends of the flow passages 46, 46, guide members 48, 48 extending in the front-rear direction of the dryer body 4 in the grain collecting section 32 are provided, and rotary valves 50, 50 for feeding are provided. Are provided respectively. In addition, grain collection section 3
2 is provided with two grain collecting plates 52, 52 arranged so as to be narrowed toward the center downward from each other from the upper end side,
At the lower end of the center of the grain collecting section 32, a collecting section 54 extending in the front-rear direction of the dryer main body 4 is provided. The collecting section 2 is provided with a lower conveying means 36.

The drying section 28 is provided with a hot air path 56 which is partitioned by two inner ventilation members 44b, 44b and extends in the front-rear direction of the dryer main body 4 between the two flow passages 46, 46. In addition, the drying unit 28 includes two flow paths 46, 46.
The exhaust passages 58, 58 extending in the front-rear direction are provided between the outer ventilation member 44a, the lower side plate 22, and the grain collecting plate 52, respectively, on the outside. Furthermore, the storage room 4 is located above the hot air passage 56.
A partition member 60 extending into the inside 2 is provided. In addition, guide members 62, 62 for guiding the grains flowing down are provided at the openings at the upper ends of the flowing grain paths 46, 46.

The grain dryer 2 is provided with a combustion mechanism 64 for burning liquid fuel to generate hot air in the hot air passage 56 in front of the dryer main body 4 of the drying section 26. On the rear side, there is provided a blower 66 for sucking and discharging the hot air in the discharge path 58. The combustion mechanism 64 includes a burner 68 and a far-infrared radiator 70. Burner 68
Are attached to the lower front plate 18. The far-infrared radiator 70 is disposed in the hot air passage 56 and has a burner 68 at one end.
And the other end thereof extends to the exhaust fan 66 side to form a combustion passage 72 including a combustion chamber 72a. The length L1 of the combustion passage 72 is at least half the length L2 of the dryer body 4 in the front-rear direction. That is, L1 ≧ L2 / 2 is set. The exhaust fan 66 is attached to the lower rear plate 20.

The far-infrared radiator 70 is formed in a substantially cylindrical shape which is open at one end by a cylindrical portion 70a having one end side open to the burner 68 side and a lid portion 70b closing the other end side of the cylindrical portion 70a. And a combustion passage 72 including a combustion chamber 72a therein.
Is formed. The far-infrared radiator 70 emits far-infrared rays by heating a far-infrared radiating material (not shown) such as ceramic attached to the surface by hot air flowing through the combustion passage 72.

In the far-infrared radiator 70, a plurality of rows (for example, five rows) of openings 74 are formed as outer surfaces, for example, on the outer peripheral surfaces on both sides, for allowing hot air from the combustion passage 72 to flow into the hot air passage 56. ing.

The grain raising machine 32, the upper conveying means 34, the lower conveying means 36, the burner 68 and the blower 66 are connected to the lower front plate 18.
Is controlled by a control unit 76 attached to the controller. The control unit 76 controls the operations of the graining machine 32, the upper conveying means 34, and the lower conveying means 36 to circulate the grains, and
And controlling the operation of the blower 66 to generate hot air for drying the grains.

Next, the operation of the first embodiment will be described.

When the operation of the grain dryer 2 is started, the controller 76 controls the grain dryer 32 and the upper conveying means 34.
And the lower conveying means 36 are operated to store the grain in the upper storage section 2.
After being led from 6 through the middle drying section 28 to the lower grain collecting section 30, the mixture is lifted and circulated again.

During the circulation of the grain, the grain dryer 2 burns the burner 68 by the control unit 76 to generate hot air and activates the exhaust fan 66 to generate hot air. And irradiates far-infrared rays through the combustion passage 72, and irradiates far-infrared rays to the grains in the flow path 46 to promote drying.

The hot air that has heated the far-infrared radiator 70 flows into the hot air passage 56 from each opening 74 of each row, and is mixed with the outside air introduced by the exhaust fan 66.
Due to the suction force of the hot air passage 56, the hot air passes through the flow path 46 and flows to the exhaust path 58.
6 to the outside.

Thus, the grain dryer 2 can be used while the grain is circulated through the storage section 26, the drying section 28, and the grain collection section 30.
The cereal is heated by heat, and the drying unit 8 promotes the drying of the cereal by far-infrared rays and dries by hot air.

As a result, in the grain dryer 2, since only the far-infrared ray radiator 70 is provided in the hot air path 56 and no return pipe is provided, it is not necessary to provide the hot air path 56 having a large volume, and the far-infrared ray The body 70 can have a large diameter, thereby reducing the size of the dryer 4 itself, facilitating the incorporation of the far-infrared radiator 70 into the small grain dryer 2, and hence the grain dryer 2. It is possible to reduce the size, reduce the cost, and increase the diameter of the far-infrared radiator 70, so that the radiation area of the far-infrared ray can be increased, and the grain can be dried by effectively using the energy by the far-infrared ray. As a result, the energy saving effect can be enhanced.

Further, since the combustion passage 72 including the combustion chamber 72a is formed long in the front-rear direction of the dryer main body 4, and the far-infrared radiator 70 is formed with a plurality of rows of openings 74, the burner combustion noise is reduced. Occurrence can be reduced.

Further, since the length L1 of the far-infrared radiator 70 is set to be at least half the length L2 of the dryer body 4 in the front-rear direction, the far-infrared radiator 70 can be easily incorporated into the hot air passage 56. In addition to the installation, the energy saving effect and the suppression of burner combustion noise can be effectively achieved.

FIGS. 5 and 6 show a second embodiment of the present invention.

In the following embodiments, portions having the same functions as those in the above-described first embodiment will be described with the same reference numerals.

The features of the second embodiment are as follows. That is, the burners 6 are provided on both outer side surfaces of the far-infrared radiator 70 in the axial direction of the far-infrared radiator 70.
A burner-side opening 74a located in the combustion chamber 72a on the side of the burner 8;
74a and a fan-side opening 74b located on the side of the fan 66
Are provided, and the opening area of the burner side opening 74a is set to be larger than the opening area of the exhaust fan side opening 74b. That is, in the axial direction of the far-infrared radiator 70, the inner diameter D1 of the burner side opening 74a is formed larger than the inner diameter D2 of the exhaust fan side opening 74b. The burner-side openings 74a, 74a are surrounded by resistance plates 84, 84 supported by a holding portion 82 fixed to the outer surface of the far-infrared radiator 70. The resistance plate 84 is connected to the exhaust fan 6 from the burner 68 side.
It is arranged diagonally so as to spread to four sides.

According to the structure of the second embodiment, the combustion chamber 7
Since a relatively large burner side opening 74a is formed near 2a and the oblique resistance plate 84 is provided, high-temperature hot air is supplied to the hot air passage 56, and the high-temperature hot air is supplied to the outside of the burner 68 by the resistance plate 84. And diffuses the outside air from the air to promote the drying of the grains and to reduce the generation of burner combustion noise.

FIG. 7 shows a third embodiment of the present invention.

The features of the third embodiment are as follows. That is, in the far-infrared radiator 70, the upper radiator 70-1 and the lower radiator 70-2 are integrally formed, and extend to the vicinity of the exhaust fan 66. Further, the upper combustion passage 72-1 formed by the upper radiator 70-1 communicates with the lower combustion passage 72-2 formed by the lower radiator 70-2, and communicates with the lower radiator 70-2. Has a plurality of openings 74 formed in the axial direction.

According to the configuration of the third embodiment, the substantial length of the far-infrared radiator 70 is increased, the far-infrared rays are generated more, and the combustion passage 72 is also substantially elongated, so that the burner combustion is performed. Sound can be effectively reduced.

[0039]

As is apparent from the above detailed description, according to the present invention, one end of the hot air passage communicates with the burner and the other end of the hot air passage extends toward the exhaust fan to form a combustion passage including a combustion chamber. A far-infrared radiator is provided, and the outer surface of the far-infrared radiator is provided with a plurality of openings for allowing hot air from the combustion passage to flow into the hot air path, so that the far-infrared radiation extending from the burner side to the exhaust fan side is provided. The body efficiently generates far-infrared rays, warms grains from the inside with far-infrared rays, promotes drying of grains, improves energy saving effects, and forms a long combustion path including the combustion chamber in the longitudinal direction of the dryer body. It is possible to reduce the generation of burner combustion noise,
Further, since the far-infrared radiator has a simple shape, the far-infrared radiator can be easily incorporated into a small grain dryer, and the grain dryer can be reduced in size and inexpensive.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a drying section of a grain dryer.

FIG. 2 is a sectional view of a remote grain dryer.

FIG. 3 is a front perspective view of the grain dryer.

FIG. 4 is a perspective view from above and behind the grain dryer.

FIG. 5 is a side view of a far-infrared radiator in a second embodiment.

FIG. 6 is a plan view of the far-infrared radiator of FIG. 5;

FIG. 7 is an enlarged sectional view of a drying section of a grain dryer in a third embodiment.

FIG. 8 is a sectional view of a conventional combustion mechanism.

[Explanation of symbols]

 2 Grain Dryer 4 Dryer Main Body 26 Storage Unit 28 Drying Unit 30 Grain Collection Unit 42 Storage Room 44 Ventilation Member 46 Flowing Granular Path 56 Hot Air Path 58 Exhaust Air Path 64 Combustion Mechanism 66 Exhaust Air Heater 68 Burner 70 Far Infrared Radiator 72 Combustion Passage 74 Opening

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L113 AA07 AB03 AC04 AC35 AC45 AC46 AC48 AC49 AC51 AC54 AC63 AC67 AC73 AC74 AC79 BA03 CB03 CB22 CB24 CB33 CB34 DA02 DA14 DA26

Claims (3)

[Claims] An upper storage unit, a middle drying unit, and a lower grain collection unit are provided in a dryer body that is long in the front-rear direction, and the storage unit and the grain collection unit are separated by a ventilation member in the drying unit. And two hot flow passages extending in the front-rear direction are provided, and a hot air passage separated by the ventilation member and extending in the front-rear direction is provided between the two flow passages. In the grain dryer in which a burner is provided and an exhaust fan is provided on the rear side of the dryer main body, one end of the hot air path communicates with the burner, and the other end extends to the exhaust fan side and includes a combustion chamber. A grain dryer, comprising: a far-infrared radiator that forms a combustion passage; and an outer surface of the far-infrared radiator provided with a plurality of openings that allow hot air from the combustion passage to flow into the hot air passage. 2. A drying device having an upper storage section, a middle drying section, and a lower grain collection section provided in a dryer body that is long in the front-rear direction, wherein the storage section and the grain collection section are separated by a ventilation member in the drying section. And two hot flow passages extending in the front-rear direction are provided, and a hot air passage separated by the ventilation member and extending in the front-rear direction is provided between the two flow passages. In the grain dryer in which a burner is provided and an exhaust fan is provided on the rear side of the dryer main body, one end of the hot air path communicates with the burner, and the other end extends to the exhaust fan side and includes a combustion chamber. A far-infrared radiator forming a combustion passage is provided, and an outer surface of the far-infrared radiator has a burner-side opening located on the burner side in the axial direction of the far-infrared radiator and an exhaust fan located on the exhaust fan side. Side opening, and A grain dryer wherein the opening area of the opening on the toner side is set larger than the opening area of the opening on the exhaust fan side. 3. The grain dryer according to claim 1, wherein a length of the far-infrared radiator is set to be equal to or more than a half of a length of the dryer body in a front-rear direction. .