JPH09113140A - Grain dryer - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a heating device for a grain dryer capable of reliably and uniformly drying grains in a relatively short time. SOLUTION: A heat radiating pipe having a far infrared radiator formed on the outer periphery is provided in a hot air chamber, a tempering chamber or a grain collecting chamber, a burner is connected to one end of these radiating pipes, and the other end of the radiating pipe is hot air. In addition to heating the kernel with far infrared,
The grains are dried by dry, hot air from the radiant tube. As a result, the heat utilization of the burner is not wasted, and the thermal efficiency is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain dryer for drying grains while circulating them inside the machine, and more particularly to improvement of a heating device for the grain dryer.

[0002]

2. Description of the Related Art Conventionally, in this type of grain dryer,
A grain refining chamber is provided at the top of the machine, and a grain-flowing passage with an aeration structure is connected to the bottom. A rotary valve is provided at the lower end of the grain flow passage, and the lower end of the grain flow passage is connected to the grain collection chamber at the bottom of the machine via this rotary valve. The exhaust chamber is adjacent to the burner and the suction fan is connected to the hot air chamber. Then, the rotary valve is rotated, and the grains in the tempering chamber are dropped into the grain collecting chamber through the grain flow passage, and are returned to the tempering chamber by the grain collecting spiral and the raising elevator and the grain feeding spiral to circulate in the machine. At the same time, the hot air of the burner is sent to the hot air chamber, passing between the grains in the grain flow passage,
Dry the grain. The exhaust hot air containing moisture after passing through the grain flow passage is sucked by the suction fan in the exhaust chamber and discharged to the outside of the machine. Thus, conventionally, there has been a problem that the thermal efficiency is not sufficient because the drying energy is supplied only by heat transfer by applying hot air to the grain.

[0003]

SUMMARY OF THE INVENTION In the present invention, radiant heat and heat transfer are used together to increase the thermal efficiency, and the grain can be removed in a relatively short time.
It is intended to be dried almost uniformly.

[0004]

In order to achieve the above object, in the present invention, a heat radiation tube having a far-infrared radiator formed on the outer circumference is provided in a hot air chamber, and a burner is connected to one end of the heat radiation tube and heat radiation is performed. The other end of the tube was opened into the hot air chamber. In addition, a mountain-shaped grain plate is installed in the tempering chamber, and a radiator pipe having a far infrared radiator formed on the outer periphery is arranged below the grain plate, and a burner is connected to one end of this radiator pipe. The other end of the heat radiation pipe was connected to the hot air chamber. Further, a heat radiation tube having a far-infrared radiator formed on the outer circumference was provided in the grain collection chamber, a burner was connected to one end of the heat radiation tube, and the other end of the heat radiation tube was connected to the hot air chamber.

[0005]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front sectional view showing the structure of a grain dryer according to the present invention, and FIG. 2 is a side view showing a part thereof in section. A heat treatment room 2 is provided above the fuselage 1. Two sets of inclined plates are formed on the left and right sides of the bottom of the tempering chamber 2 so as to face each other in a V shape to form the grain portion 4. A pair of flow-regulating chevrons 13 each formed in a chevron shape by a plate material extending in the front-rear direction are provided above the grain portion 4. Grain flow-down passages 3 surrounded by a perforated plate 16 are formed at the lower ends of the left and right flown grain portions 4, and the lower end portion thereof can be seen in a grain collection chamber 5 provided at the lower portion of the machine body 1, and the rotary portion at the lower end portion A valve 6 is provided. A large number of small holes are formed in the perforated plate 16 to provide air permeability. A hot air chamber 7 is provided on the inner side of the grain flow passage 3 and an exhaust air chamber 8 is provided on the outer side thereof so as to cross the grain flow passage 3 and to be freely ventilated to the exhaust air chamber 8. . A burner 9 is connected to the hot air chamber 7 and a suction fan 10 is connected to the air exhaust chamber 8. In the tempering chamber 2, a grain feeding spiral 11 extending in the front-rear direction is provided at the center of the ceiling, and a diffusing plate 12 connected to an electric motor (not shown) is provided at the end thereof. The grain-collecting chamber 5 is provided with a grain-collecting helix 14 extending in the front-rear direction at the center of the bottom, and the rear end of the grain-collecting helix 14 is connected to a lifting elevator 15, and the upper end of the lifting elevator 15 feeds the grain in the tempering chamber 2. Connected to the starting end of the helix 11, passed through the grain flow passage 3 from the tempering chamber 2, and from the grain collecting chamber 5 to the grain collecting helix 1.
4, through the ascending elevator 15 and the grain feeding helix 11, a diffusion plate 12 forms a circulation route for grains that diffuse to the upper part of the tempering chamber 2.

As shown in FIG. 2, a burner 9 is provided outside the machine body 1 in the front of the hot air chamber 7, and a heat radiating pipe 17 connected to the burner 9 and extending rearward is disposed substantially horizontally in the hot air chamber 7. Then, at the rear of the hot air chamber 7, it is folded back upward in a U shape, and the tip 17a is returned to the burner 9 side and opened into the hot air chamber 7. Radiator tube 17
Is a far-infrared paint that forms a far-infrared radiator on the outer periphery of the double-tube portion 18 by covering a predetermined range from the connection portion with the burner 9 with an outer tube (for example, B- manufactured by Okitsumo Co., Ltd. 600) is painted. A suction fan 10 is provided outside the machine body 1 on the back surface of the exhaust chamber 8.

The operation of the grain dryer configured as described above will be described. The harvested grain is supplied to the tempering chamber 2 by the ascending elevator 15 and the grain feeding helix 11,
The grains are dropped onto the diffusion plate 12 and the diffusion plate 12 is rotated so that the grains are widely and uniformly dispersed in the tempering chamber 2. At this time,
The grain fills the grain flow path 3 and reaches the rotary valve 6. In this state, hot air is blown into the hot air chamber 7 by the burner 9.
The double pipe portion 18 of the heat radiating pipe 17 is directly heated by the hot air from the burner 9, and far infrared rays are radiated from the far infrared paint coated on the outer periphery. Here, double pipe section 1
8 prevents the tube wall from overheating. The hot air that has heated the double pipe portion 18 is supplied into the hot air chamber 7 from the tip 17 a of the heat dissipation pipe 17. Then, it passes between the grains in the grain flow passage 3 from the hot air chamber 7 to evaporate the moisture content of the grains to form moist exhaust hot air, which is sucked and exhausted by the suction fan 10 in the exhaust chamber 8 and then out of the machine. Discharge. Far-infrared rays emitted from the outer periphery of the double pipe section 18 irradiate and heat the inner wall of the grain flow-down passage 3, and directly irradiate the grain in the grain flow-down passage 3 through the numerous small holes. By the penetration of far infrared rays, the grains in the grain flow path 3 are heated uniformly, promoting the movement of the moisture content in the grains to the surface, speeding the drying of the grains, and shrinking, cracking, and mold Prevent defects such as generation and alteration.

Then, the rotary valve 6 causes the grains in the grain flow-down passage 3 to sequentially fall into the grain collecting chamber 5. The grain descending through the grain flow-down passage 3 is heated by far infrared rays radiated from the outer periphery of the heat radiating pipe 17, and is simultaneously dried by hot air from the tip 17 a of the heat radiating pipe 17. Grains that have fallen into the grain collecting chamber 5 are sent by the grain collecting helix 14 and transferred to the ascending elevator 15 to ascend, move to the grain supplying helix 11 at the upper end of the ascending elevator 15, and the tempering chamber 2 is provided by the diffusion plate 12. Returned to the top of. After that, the grain has a predetermined moisture content (for example, 13 to 14).
%) Repeatedly circulating in the machine. As described above, in the example of FIGS. 1 and 2, since the radiation pipe 17 is housed in the hot air chamber of the conventional circulation type dryer, the conventional dryer can be used as it is, which is economical, and the conventional technology can be used for the drying capacity. It has the advantage of being easy to grasp.

FIG. 3 is a front sectional view showing the structure of a grain dryer in which the heat dissipation pipe of the present invention is provided in a tempering chamber, and FIG. 4 is a side view thereof.
FIG. 5 is a front view thereof. The structure and operation of the parts different from the grain dryer shown in FIGS. 1 and 2 will be described below. In the tempering chamber 2, two plates extending in the front-rear direction are attached in the center in a mountain shape to form a grain plate 23, and a heat radiating pipe 17 extending in the front-rear direction is disposed below the grain plate 23, and above the heat radiating pipe 17. A heat dissipation portion 20 is formed by providing a reflection plate 19 having an arcuate cross section that extends in the front-rear direction. The burner 9 is attached to the rear of the heat radiating portion 20 so as to project outward from the machine body 1. As shown in FIG. 6, the double pipe portion 18 is connected first to the heat radiating pipe 17 of the rear burner 9, and the heat radiating portion 20 is connected. Connect the heat dissipation pipe 17 at the front of the block 2
1, and the tip 17a thereof is returned to the burner 9 side and protrudes to the outside of the machine body 1. Double pipe part 1 of heat dissipation pipe 17
Far-infrared paint is applied to the outer periphery of 8 as described above. The tip 17a of the heat dissipation pipe 17 is connected to the connecting pipe 22 extending downward along the machine body 1, and the lower end of the connecting pipe 22 is communicated with the hot air chamber 7. The upper ends of the two flow regulating plates 27 are attached to the inner side surfaces at positions facing the heat radiating portion 20 in the center of the tempering chamber 2, and are fixed so that the distance between the flow regulating plates 27 is narrowed downward. A grain flow path is formed between them to regulate the grain flow. With the above configuration, the hot air is sent from the burner 9 to the radiating pipe 17, the double pipe portion 18 is heated, and sent to the hot air chamber 7 via the connecting pipe 22, and the hot air chamber 7 transfers the grain downflow passage. The air enters into the exhaust chamber 8 through 3, and is exhausted to the outside of the machine by a suction fan 10 provided so as to project on the front surface of the machine body 1. The double pipe portion 18 of the radiating pipe 17 is heated by the hot air of the burner 9, and the far-infrared paint applied to the outer periphery of the double pipe portion 18
The grains in the tempering chamber 2 are heated almost uniformly by directly irradiating the grains exposed at the bottom of the hollow portion of the grains formed below the shed plate 23. As described above, in the examples of FIGS. 3 to 6, since the grains in the tempering chamber are directly irradiated with far-infrared rays, the grains do not dry but rise in temperature and the moisture distribution inside the grains becomes substantially uniform.
When this grain flows down the grain flow path 3, it is exposed to the hot air supplied from the tip 17a of the heat radiating pipe 17, so that there is an advantage that the drying progresses quickly.

FIG. 7 is a front sectional view showing the construction of a grain dryer in which the heat radiation tube of the present invention is provided in the grain collection chamber, and FIG. 8 is a side view thereof. The structure and operation of the parts different from the grain dryer shown in FIGS. 1 and 2 will be described below. At the center of the upper part of the grain collecting chamber 5, a partition plate 25 is provided which partitions the space between the hot air chamber 7 and the eaves-like projecting pieces 24 on the right and left sides, and below the partition plate 25, the radiating pipe 17 is arranged in parallel with the front-rear direction. Set up. Grain collection room 5
The burner 9 is attached to the front of the machine so as to project from the machine body 1, the double pipe portion 18 of the heat radiating pipe 17 is connected to the burner 9, and it is folded back upward in a U-shape in front of the grain collection chamber 5 and returned to the burner 9 side. At the burner 9 side, the tip 17a of the connecting U-shaped tube 26 is looked into the hot air chamber 7. By configuring as above,
Hot air is sent from the burner 9 to the heat radiating pipe 17 to heat the double pipe portion 18, and the far infrared coating material applied to the outer periphery of the double pipe portion 18 is directly radiated to the grains in the grain collecting chamber 5 for heating. The heated grain is returned to the upper portion of the tempering chamber 2 by the grain collecting helix 14, the raising elevator 15, the grain feeding helix 11, and the diffusion plate 12. When passing through the grain flow-down passage 3, the heat dissipation pipe 17
By heating and drying with hot air supplied from the tip 17a of
The moist exhaust hot air is discharged from the exhaust chamber 8 to the outside of the machine by the suction fan 10. Thus, in the example of FIGS. 7 and 8, the burner 9
Hot air from the hot air chamber 7 through the radiating pipe 17 from the tip 17a.
To dry the grain. This grain is the grain flow path 3
When continuously flowing through the grain collection chamber 5, the radiation pipe 17 receives far infrared radiation. Therefore, the grains that have been exposed to the hot air and have a difference in water distribution between the surface layer portion and the center portion are heated to the inside by far-infrared irradiation and the water distribution is averaged, so that the tempering action in the tempering chamber 2 is smoothly performed. It has the advantage of being done.

[0011]

INDUSTRIAL APPLICABILITY In the present invention, a far-infrared radiator is formed on the outer periphery of a heat-radiating pipe connected to a burner, the heat-radiating pipe is heated by the hot air of the burner to radiate far-infrared light, and grains circulating in a dryer are collected. While heating with far infrared rays, the hot air that has passed through the heat radiation pipe is returned to the hot air chamber, and the grains that flow down through the grain downflow passage 3 are heated by ventilation. Since the hot air discharged from the heat radiation pipe does not contain moisture, it has the ability to sufficiently dry the grains in the grain flow passage 3. Therefore, according to the present invention, heating by far infrared rays and drying by hot air having no moisture proceed in parallel, grain can be efficiently dried, and shortening of drying time and reduction of heat consumption can be achieved.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing the configuration of a grain dryer of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front cross-sectional view showing the configuration of a grain dryer in which a heat dissipation pipe of the present invention is provided in a tempering chamber.

FIG. 4 is a side view of the same grain dryer.

FIG. 5 is a rear view of the same grain dryer.

FIG. 6 is a plan view showing a configuration of a heat radiating tube of the same grain dryer.

FIG. 7 is a front cross-sectional view showing the configuration of a grain dryer in which the heat radiation tube of the present invention is provided in the grain collection chamber.

FIG. 8 is a side view of the same grain dryer.

[Explanation of symbols]

 1 Airframe 2 Conditioning room 3 Grain flow path 4 Grain flow section 5 Grain collecting room 6 Rotary valve 7 Hot air chamber 8 Exhaust air chamber 9 Burner 10 Suction fan 11 Grain feeding spiral 12 Diffusion plate 13 Flow control Yamagata 14 Grain collecting helix 15 Lifting elevator 16 Perforated plate 17 Radiating pipe 18 Double pipe part 19 Reflecting plate 20 Radiating part 21 Connection block 22 Connecting pipe 23 Grains board 24 Projecting piece 25 Partition plate 26 Connecting U-shaped pipe 27 Flow regulating plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000197344 Shizuoka Machinery Co., Ltd. 1-4 Yamana-cho, Fukuroi-shi, Shizuoka Prefecture (71) Applicant 000144898 Yamamoto Manufacturing Co., Ltd. 404 Noomori, Tendo-shi, Yamagata Prefecture (72) Invention Kotaro Kubota 1-40-2 Nisshin-cho, Omiya-shi, Saitama Biotechnology-Specific Industrial Technology Research Organization (72) Inventor Katsuo Katsuzaki 1-40-2 Nisshin-cho, Omiya-shi, Saitama Bio-specific industries Within the Technical Research Promotion Organization (72) Inventor Tomohiko Ichikawa 1-40-2 Nisshin-cho, Omiya City, Saitama Prefecture Within the Research Promotion Organization for Specific Industrial Technology for Biotechnology (72) Inventor Hironori Uetani 1 Yakura, Tobe Town, Iyo-gun, Ehime Prefecture Address: Iseki Agricultural Machinery Co., Ltd. Technical Department (72) Inventor Kojo ▲ Rei ▼ No. 1, Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. (72) Inventor Masayuki Domon 2-21-10 West, Hanyu-shi, Saitama Prefecture Kaneko Agricultural Machinery Co., Ltd. (72) Inventor Satoshi Ikeda 2--21-10 West, Hanyu City, Saitama Prefecture Kaneko Agricultural Machinery Co., Ltd. (72) Inventor Zoka Waseri 6981-2, Hachihonmatsuchohara, Higashihiroshima City, Hiroshima Prefecture (72) Inventor Yoshikuni Miyatake 1232-5 Kuno, Fukuroi City, Shizuoka Prefecture (72) Inventor Toshihiro Takeda 404, Oonomori, Tendo City, Yamagata Corporation Yamamoto Manufacturing Co., Ltd. Within

Claims (3)

[Claims] 1. A grain-flowing passage having a ventilation structure is connected to the tempering chamber, a lower end of the grain-flowing passage is connected to a grain-collecting chamber, and a hot air chamber and an exhaust air chamber are provided with the grain-flowing passage sandwiched therebetween. , A heat radiating tube having a far infrared radiator formed on the outer periphery is provided in the hot air chamber, the burner is connected to one end of the heat radiating tube, and the other end of the heat radiating tube is opened in the hot air chamber to dry the grain. Machine. 2. A tempering chamber is connected to a grain flow-down passage having a ventilation structure, a lower end of the grain flow-down passage is connected to a grain collecting chamber, and a hot air chamber and an exhaust air chamber are provided across the grain flow-down passage. , A mountain-shaped grain plate is installed in the tempering chamber, a radiation pipe having a far infrared radiator formed on the outer periphery is arranged below the grain plate, and a burner is connected to one end of the radiation pipe. , A grain dryer in which the other end of the heat radiation pipe is connected to the hot air chamber. 3. The tempering chamber is connected to a grain flow-down passage having a ventilation structure, the lower end of the grain flow-down passage is connected to a grain collecting chamber, and the hot air chamber and the exhaust air chamber are adjacent to each other with the grain flow-down passage interposed therebetween. Then, a heat radiating tube having a far infrared radiator formed on the outer periphery is arranged in the grain collecting chamber, a burner is connected to one end of the heat radiating tube, and the other end of the heat radiating tube is connected to the hot air chamber. Dryer.