JP2007271169A - Grain drying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grain drying apparatus capable of preventing accumulation of dust on a surface of a far infrared ray radiator during charging of grain. <P>SOLUTION: An grain storage tank, a forced-air drying part 3, and a grain takeout tank 4 are respectively provided in an upper section, a middle section, and a lower section of a dryer body 1. The far infrared ray radiator 14 for grain flowing down from the forced-air drying part 3 is provided in the grain takeout tank 4. The grain stored in the grain storage tank is dried by forced-air drying and irradiation of far infrared rays while circulating it in a path through the forced-air drying part 3, the grain takeout tank 4 and the grain storage tank. An exhaust side of the far infrared ray radiator 14 and the grain takeout tank 4 provided with the far infrared ray radiator 14 are communicated in a suction air duct sucking and distributing outside air into the forced-air drying part 3. A change-over damper 22 is provided for directly communicating a communication part of the exhaust side of the far infrared ray radiator 14 and the grain takeout tank 4 provided with the far infrared ray radiator 14, with a suction blower side 13 during charging and discharging of grain. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a grain drying apparatus for drying a grain by heating with irradiation of far infrared rays and ventilation of warmed air.

  The upper part of the dryer body has a grain storage tank, the middle part has a ventilation drying section, the lower stage has a grain extraction chamber, and the grain stored in the grain storage tank is a ventilation drying section, a grain extraction chamber, a grain storage tank A grain drying apparatus for drying in the far infrared by irradiating far-infrared rays to the grains flowing from the ventilation drying section in the grain take-out chamber while circulating and flowing in the path of No. 61055, JP-A-10-82586, and JP-A-2001-41655. In these grain dryers, far-infrared rays are applied to the grains flowing down the drying passage of the ventilation drying section. While irradiating, drying by far infrared rays is used in combination with drying by ventilation.

  A grain dryer that removes dust by operating a blower at the time of grain insertion at a low speed is described in JP-A-8-42967, and an apparatus for controlling the output of the blower so that the power used by the apparatus does not exceed the allowable power. This is described in JP-A-9-310833.

Japanese Patent Laid-Open No. 9-61055 Japanese Patent Laid-Open No. 10-82586 JP 2001-41655 A JP-A-8-42967 JP-A-9-310833

  In this type of grain drying device, the grains are not circulated and flowed when the grains are stretched and discharged, but especially when the grains are stretched, the dust mixed in the grains is impacted by the tension. However, the suction air blower is operated and the dust is sucked out. A part of the grain is sucked out and dissipated out of the machine.

  In addition, when a grain is stretched in a grain drying apparatus, the grain is supplied to the tension hopper of the grain drying apparatus using a normal stretching apparatus. It is necessary to take power from two machines from one power source. Furthermore, when supplying a grain from a grain drying apparatus to the hulling apparatus of a post process, it is necessary to operate the grain drying apparatus and the hulling apparatus at the same time. As described above, in the embedding or discharging of the grain, the power used by the grain drying device and the power consumption of the other devices are added, so that the allowable power amount of the contract may be exceeded.

  For this reason, conventionally, in this type of grain drying device, in order to prevent the grain from scattering outside the machine and to use power within the allowable power, the suction blower is unavoidably stopped and the grain is stretched and discharged. However, the actual situation is that the deterioration of the working environment due to dust scattering can no longer be neglected. Therefore, as in Patent Document 4, the blower is operated at a low speed at the time of grain insertion (at the time of tension), but the power consumption is small, but the dust from the grain drying device is prevented from being scattered at the work place and the working environment is good. It has been done.

  However, in a grain drying apparatus equipped with a far-infrared radiator, the amount of air in the grain take-out chamber is reduced by operating the suction blower at a low speed when the grain is inserted and discharged, so the grain is reduced. Dust scattered in the take-out chamber accumulates on the surface of the far-infrared radiator, and when the drying starts or begins to dry, the burnt smoke of the dust accumulated on the surface of the far-infrared radiator fills the aircraft and is drying It is also a cause of poor quality due to the bad smell attached to the product.

  Therefore, the present invention is provided with a switching damper that directly communicates the communication part between the exhaust side of the far-infrared radiator and the grain take-out chamber provided with the far-infrared radiator when the grain is inserted and discharged to the suction fan side. Even if the air volume of the suction blower is reduced, dust that scatters in the grain extraction chamber when the grain is stretched is preferentially excluded outside by the suction air from the suction blower. An object of the present invention is to provide a grain drying apparatus that can prevent accumulation on the surface of the body and thus prevent deterioration in quality caused by bad odor adhering to the grain being dried. is there.

  In order to achieve the above object, the present invention provides a grain drying apparatus according to claims 1, 2, and 3. The grain drying apparatus according to claim 1 is provided with a grain storage tank in the upper stage of the dryer main body, a ventilation drying unit in the middle stage, and a grain take-out chamber in the lower stage, and ventilation drying of the grains stored in the grain storage tank. In the grain drying device that circulates and flows in the path of the head part, the grain take-out chamber, and the grain storage tank, the far-infrared radiator that irradiates the grain that flows down from the ventilation drying unit into the grain take-out room The far-infrared radiator is provided with a burner that serves as a heat source for drying, and the exhaust air side of the far-infrared radiator and the far-infrared radiator are provided in the suction air passage through which the outside air is sucked and distributed to the ventilation drying unit. Communicating with the grain take-out chamber, and directly connecting the communication part between the exhaust side of the far-infrared radiator and the grain take-out room provided with the far-infrared radiator when the grain is inserted and discharged to the suction blower side A switching damper is provided.

  The grain drying apparatus according to claim 2 is the grain drying apparatus according to claim 1, wherein the far-infrared radiator that irradiates the grain with far-infrared radiation is cylindrical and has a burner at the center of one end thereof. The flame heat radiation tube is faced, and an exhaust tube for combustion hot air is connected to the other end of the axis to rotate around the axis, and the grain is extracted from one rotary bearing of the far-infrared radiator. It is characterized by introducing outside air into the chamber.

  The grain drying apparatus according to claim 3 is switched when the air volume of the suction blower is decreased from the air volume at the time of drying while circulating and flowing in the grain drying apparatus of claim 1 or 2. The damper is characterized in that the communicating part with the grain take-out chamber is directly communicated with the suction blower side.

  According to the grain drying apparatus of the present invention, the communicating part between the exhaust side of the far-infrared radiator and the grain extraction chamber provided with the far-infrared radiator is directly connected to the suction blower side when the grain is stretched and discharged. Even if the air volume of the suction blower is reduced by providing a switching damper that communicates with the dust blower, dust scattered in the grain take-out chamber when the grain is stretched is preferentially controlled by the suction air from the suction fan. It is possible to prevent the deterioration of the quality caused by the bad odor from adhering to the grain during drying by preventing it from being deposited outside and depositing on the surface of the far-infrared radiator.

  FIG. 1 is a plan sectional view of a grain drying apparatus according to the present invention, FIG. 2 is a perspective view showing a part of the grain drying apparatus according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. It is a vertical front view of the grain drying apparatus which concerns on a form.

  In FIG. 1 to FIG. 3, reference numeral 1 denotes a dryer main body, a grain storage tank 2 in the upper stage of the dryer main body 1, a ventilation drying unit 3 in the middle stage, and a grain take-out chamber 4 in the lower stage. Each is provided. In the lower part of the grain take-out chamber 4, there is provided a grain carry-out conveyor 5 over the entire length in the front-rear direction, and the grain carry-out conveyor 5 and the upper conveyor 6 at the upper part of the grain storage tank 2 are connected by an elevator 7. Thus, the grains are circulated through the path of the grain storage tank 2, the ventilation drying unit 3, the grain extraction chamber 4, and the grain storage tank 2 through the grain delivery conveyor 5, the elevator 7 and the upper conveyor 6. It is configured.

  The ventilation drying section 3 has a plurality of drying passages 8 formed by ventilation walls, and a hot air supply cylinder 9 constituting the drying passage 8 sucks and circulates outside air and mixes it with combustion air, and is suitable for drying. The exhaust air cylinder 11 communicates with the exhaust air chamber 12, and the exhaust air chamber 12 is provided with a suction blower 13.

  The grain take-out chamber 4 is formed by being surrounded by a flowing grain board and both side walls that are inclined from the upper side of the grain take-out chamber 4 to the conveying bowl of the grain carry-out conveyor 5. A far-infrared radiator 14 is disposed in the grain extraction chamber 4, and the far-infrared radiator 14 has a cylindrical shape extending over substantially the entire length in the front-rear direction of the grain extraction chamber 4. Far-infrared rays radiated from the far-infrared radiator 14 are drawn out by the rotation of the feeding roll 15 from the drying passage 8 of the ventilation drying unit 3, and the grains flow down in a granular or thin layer form on the surface of the drifted cereal plate. Irradiated to the grain. At one end of the far-infrared radiator 14, a thermal radiation cylinder 17 of a gun-type burner 16 faces the axis, and an exhaust cylinder 18 is connected to the axis on the exhaust side of the far-infrared radiator 14. .

  The far-infrared radiator 14 is rotatable by the rotary bearing portions 19 at both ends, and the far-infrared radiator 14 obtains power from the rotation from the motor 20 or the feeding roll 15 and continuously rotates at a low speed. ing. The gun-type burner 16 and the exhaust pipe 18 are connected to each other with a structure that does not hinder the rotation of the far-infrared radiator 14. The portion where the far-infrared radiator 14 of the grain extraction chamber 4 is disposed is a portion that communicates with the suction blower 13 of the hot air supply chamber 10 and the exhaust air chamber 12 by the exhaust duct 18 and the intake duct 21 that is a double cylinder. In this way, outside air is sucked and introduced into or around the rotary bearing portion 19 of the far-infrared radiator 14 to prevent overheating and the far-infrared radiator 14 in the vicinity thereof. It is intended to remove dust adhering to the surface. The exhaust pipe 18 and the intake duct 21 connected to the exhaust side of the far-infrared radiator 14 are opened to the hot air supply chamber 10 and are opened at the portion of the hot air supply chamber 10 and the exhaust air chamber 12 that communicates with the suction blower 13. The burner 16 provided in the far-infrared radiator 14 satisfies a heat source required for drying, that is, a total heat amount for generating far-infrared radiation and hot air.

  The exhaust pipe 18 and the intake duct 21 are connected to the hot air supply chamber 10 side at the boundary between the hot air supply chamber 10 and the exhaust air fan 12 connected to the suction blower 13, or the hot air supply chamber 10 is connected to the suction air fan 13 of the exhaust air chamber 12. A switching damper 22 for switching whether to communicate with the portion is provided, and at the time of grain filling and discharging, the grain provided with the exhaust side of the far-infrared radiator 14 and the far-infrared radiator 12 by switching the switching damper 22 The communicating portion with the grain extraction chamber 4 can be directly communicated with the suction blower 13 side.

Even when the switching damper 22 is switched to the direction in which the grain take-out chamber 4 and the suction blower 13 are in direct communication with each other, the action of the suction blower 13 causes the hot air supply chamber 10 and the drying passageway to function. 8, outside air flows into the exhaust chamber 12 through the exhaust cylinder 11 and the grain storage tank 2
The dust generated in the ventilation drying section 3 can be discharged from the suction blower 13 to the outside of the apparatus.

  When throwing grain into the grain drying device (at the time of loading) or discharging, there is a device for feeding grain into the dryer body 1 in addition to the dryer body 1 at the time of loading, In some cases, when the grain is discharged from the dryer main body 1 while the hulling device is in operation, sometimes the power consumption exceeds the allowable power. In this case, it is possible to stop only the suction blower 13 of the dryer body 1 so that the power consumption does not exceed the allowable power. However, the work environment is deteriorated by generating dust in the work place. End up.

  Therefore, the suction blower 13 is rotated at a low speed in order to generate a slight amount of air that prevents the dust blower 13 from only scattering dust generated in the dryer body 1. Usually, in the grain drying apparatus, the suction blower 13 uses more than half of the power used. However, since the air volume is such that dust does not scatter from the dryer body 1, the power used is 1/10 or less. In many cases, even when a device other than the grain drying device is operated at the time of filling or discharging, the power used can be kept within the allowable power.

  In a normal dry state, the suction blower 13 operates at a high rotation speed in order to generate a normal air volume suitable for drying. Therefore, a large amount of outside air is sucked in the hot air supply chamber 10 and the grain take-out chamber 4 Since the outside air forcibly sucks the dust generated in the grain take-out chamber 4 from the rotary bearing portion 19 of the far-infrared radiator 14 or its surroundings, the dust does not adhere to the surface of the far-infrared radiator 14. . However, if the suction blower 13 is rotated at a low speed during discharging during tensioning, naturally, the amount of outside air sucked from the rotary bearing portion 19 or its surroundings decreases, and dust adheres to the surface of the far-infrared radiator 14.

  In view of this, the switching damper provided at the boundary between the hot air supply chamber 10 and the exhaust air chamber 12 that communicates with the suction fan 13 is connected to the exhaust air chamber from the direction in which the exhaust pipe 18 and the intake duct 21 communicate with the hot air supply chamber 10. Even if the air volume of the suction blower 13 is reduced by switching to the direction communicating with the portion of the 12 suction blower 13, the amount of the outside air sucked preferentially from the rotary bearing portion 19 or its surroundings is increased. Dust generated in the grain extraction chamber 4 is sucked to prevent the dust from adhering to the surface of the far-infrared radiator 14.

  In addition, since the grain stays in the drying passage 8 and forms a grain layer at the time of discharging at the time of filling, ventilation resistance is generated, and although there is some ventilation in the drying passage 8, the inside of the grain extraction chamber 4 Is preferentially aspirated. Although there is ventilation resistance in the grain layer in the drying passage 8, some outside air from the hot air supply chamber 10 passes from the hot air supply drum 9 through the drying passage 8, passes through the exhaust drum 11, and is sucked from the exhaust chamber 12. Therefore, the amount of dust generated in the ventilation drying unit 3 and the grain storage unit 2 can be reduced.

  According to the grain drying apparatus according to the present invention, the far-infrared radiator 14 irradiates the grain to be dried with far infrared rays, thereby heating the inside of the grains in a relatively short time and transferring moisture to the surface. In addition, moisture can be quickly evaporated from the surface of the dried grain by ventilation with respect to the surface of the dried grain, and the dried grain can be efficiently dried in a relatively short time.

  And according to the grain drying apparatus which concerns on this invention, the grain extraction chamber 4 which provided the exhaust side of the far-infrared radiator 14 and the far-infrared radiator 14 with the switching damper 22 at the time of the tension | tensile_strength and discharge | emission of a grain. By connecting the communicating part directly to the suction blower 13 side, the dust scattered in the grain take-out chamber 4 especially when the grain is stretched is removed outside by the suction blower 13 from the machine. Accumulation on the surface of the radiator 14 can be prevented, and deterioration in quality caused by bad odor adhering to the grain being dried can be prevented.

It is a plane sectional view of the grain drying device concerning the present invention. It is a perspective view which fractures | ruptures and shows a part of grain drying apparatus which concerns on embodiment of this invention. It is a vertical front view of the grain drying apparatus which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dryer main body 2 Grain storage tank 3 Ventilation drying part 4 Grain extraction room 5 Grain carry-out conveyor 6 Upper conveyor 7 Elevator 8 Drying passage 9 Hot air supply drum 10 Hot air supply chamber 11 Exhaust drum 12 Exhaust chamber 13 Suction blower 14 Far-Infrared Radiator 15 Feed Roll 16 Burner 17 Heat Radiation Tube 18 Exhaust Tube 19 Rotating Bearing 20 Motor 21 Intake Duct 22 Switching Damper

Claims (3)

The upper part of the dryer body has a grain storage tank, the middle part has a ventilation drying section, the lower stage has a grain extraction chamber, and the grain stored in the grain storage tank is a ventilation drying section, a grain extraction chamber, a grain storage tank In the grain drying device that dries while circulating and flowing in the path of
In the grain extraction room, a far-infrared radiator that irradiates far-infrared rays to the grain flowing down from the ventilation drying unit,
This far-infrared radiator has a burner as a heat source for drying,
The suction air passage for sucking and circulating the outside air to the ventilation drying unit communicates the exhaust side of the far-infrared radiator and the grain extraction chamber provided with the far-infrared radiator,
It is characterized in that a switching damper is provided that directly communicates the communication part between the exhaust side of the far-infrared radiator and the grain take-out chamber provided with the far-infrared radiator when the grain is inserted and discharged to the suction blower side. Kernel drying equipment.   The far-infrared radiator that irradiates the grain with far-infrared rays is cylindrical, with a flame-heat radiation cylinder of a burner facing the axis of one end, and an exhaust pipe of combustion hot air connected to the axis of the other end 2. A grain drying apparatus according to claim 1, wherein the grain drying apparatus is configured to rotate about an axis, and is configured to introduce outside air from one rotary bearing portion of the far-infrared radiator to the grain extraction chamber. .   When the air flow of the suction blower is reduced from the air flow at the time of drying while circulating and flowing, the switching damper connects the communicating portion with the grain take-out tank directly to the suction blower side. Item 3. A grain drying apparatus according to item 1 or 2.

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