JP4804214B2 - Grain drying equipment - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a grain drying apparatus that circulates and flows grains and soaks hot air into the flowing grains to dry them by ventilation.

  The upper part of the dryer body has a grain storage tank, the middle part has a ventilation drying section, and the lower stage has a grain extraction tank, and the grains stored in the grain storage tank are circulated and flown through the path of the ventilation drying section, grain extraction tank, and grain storage tank. Grain drying apparatuses that dry while drying are disclosed in JP-A Nos. 2001-41655, 2003-176984, 11-30483, 11-83322, 9-89453, and JP-A-9-89453. In these grain drying apparatuses described in JP-A-8-14745, far infrared rays are applied to grains flowing down the drying passage of the ventilation drying section, except for those described in JP-A-11-83322. Is used in combination with drying by ventilation and far-infrared drying.

JP 2001-41655 A JP 2003-176984 A Japanese Patent Laid-Open No. 11-30383 Japanese Patent Laid-Open No. 11-83322 JP-A-9-89453 JP-A-8-14745

  In circulation drying of grains in this kind of grain drying apparatus, in order to dry the grains evenly throughout, it is important to prevent the grains from flowing down and to prevent the occurrence of uneven ventilation in the ventilation drying section. The ventilation drying section has a plurality of hot air supply cylinders formed by the ventilation walls and a plurality of exhaust wind cylinders formed by the ventilation walls alternately arranged to form a drying passage, and the exhaust ventilation cylinder is at one end side. Since there is a considerable difference in the suction exhaust state between the side close to and far from the suction fan in the exhaust fan, it is circulated through the drying passage of the ventilation drying unit. It has been pointed out that the drying unevenness of the grain due to the unevenness of the drying air volume and the temperature distribution unevenness.

  In addition, since there is a difference in the suction exhaust state between the side closer to the suction fan and the side far from the suction fan, dust accumulates at the bottom of the exhaust fan as the distance from the suction fan increases. There is a need for room cleaning.

Accordingly, the present invention provides an exhaust chamber in which the exhaust drum of the ventilation drying unit communicates with a constricted wind tunnel so that the sectional area gradually decreases from one end side equipped with a suction blower toward the front side, and the bottom surface thereof. Is inclined downward toward the suction blower side, so that the suction air volume of the entire exhaust chamber by the suction blower is made uniform regardless of the distance from the suction blower, and unevenness in the amount of dry air flowing through the drying passage of the ventilation drying section In addition to eliminating unevenness in grain drying due to uneven temperature distribution, the cross-sectional area is reduced and the wind speed is increased as the distance from the suction fan is increased in the exhaust air chamber, so that dust does not accumulate on the bottom of the exhaust air chamber. The object is to provide a grain drying apparatus.

In order to achieve the above object, the present invention provides a grain drying apparatus according to claims 1 to 4 . That is, 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 section in the middle stage, and a grain take-out tank in the lower stage, respectively. In the grain drying apparatus that dries while circulating and flowing along the route of the take-out tank and grain storage tank, the ventilation drying unit includes a plurality of hot air supply cylinders formed by the ventilation walls and a plurality of exhaust wind cylinders formed by the ventilation walls. The hot air supply cylinder constituting the drying path is in communication with the hot air supply chamber, and the exhaust wind cylinder communicates with the exhaust air chamber, and a suction blower is provided at one end of the exhaust air chamber. The exhaust chamber has a constricted wind tunnel so that the cross-sectional area gradually decreases from one end side to the front side provided with a suction blower, and the bottom surface is inclined downward toward the suction blower side. It is characterized in that which had been It is intended.

  According to a second aspect of the present invention, there is provided the grain drying apparatus according to the first aspect, wherein a far-infrared radiator for irradiating far-infrared rays to the grain flowing down from the ventilation drying section is provided in the grain take-out tank. Is equipped with a burner that serves as a heat source for drying, and is configured to suck and circulate the exhaust heat of combustion of the far-infrared radiator in a hot air supply chamber that communicates with a hot air supply cylinder that constitutes a drying passage. To do.

  According to a third aspect of the present invention, there is provided the grain drying apparatus according to the second aspect, wherein the far-infrared radiator that irradiates the grain with far-infrared rays has a cylindrical shape, and the flame heat radiation cylinder of the burner faces the axial center of one end thereof. In addition, an exhaust pipe for combustion hot air is connected to the shaft center at the other end to rotate around the shaft center, and the combustion discharge of the far-infrared radiator is transferred from one rotary bearing portion of the far-infrared radiator to the hot air supply chamber. The configuration is such that hot air is sucked and distributed.

According to a fourth aspect of the present invention, there is provided the grain drying apparatus according to the first, second, or third aspect , wherein the hot air supply chamber forms a suction air passage for sucking and circulating the outside air, and combustion of the far-infrared radiator in the hot air supply chamber The exhaust heat air is mixed with the intake outside air.

According to the grain drying apparatus of the present invention, the exhaust chamber in which the exhaust drum of the ventilation drying unit communicates is throttled so that the cross-sectional area gradually decreases from one end side including the suction blower toward the front side. By making the bottom of the wind tunnel down and inclined toward the suction blower, the suction air volume of the entire exhaust chamber by the suction blower is made uniform regardless of the distance from the suction blower and flows through the drying passage of the ventilation drying section Grain drying unevenness due to uneven drying air volume and temperature distribution can be eliminated , and in the exhaust air chamber, the cross-sectional area is reduced and the wind speed is increased as the distance from the suction fan is increased. The effect of not depositing dust on the surface can be obtained.

  1 is a longitudinal 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 broken, FIG. 3 is a top sectional view of the same, and FIG. 4 is a perspective view of a part of the same. FIG. 5 is a plan sectional view of a grain drying apparatus according to another embodiment of the present invention.

  1 to 4, reference numeral 1 denotes a dryer main body, and a grain storage tank 2 is provided in the upper stage of the dryer body 1, a ventilation drying unit 3 is provided in the middle stage, and a grain take-out tank 4 is provided in the lower stage. It has been. A grain carry-out conveyor 5 is provided at the lower part of the grain take-out tank 4 in the front-rear direction, and the grain carry-out conveyor 5 and the upper conveyor 6 above the grain storage tank 2 are connected by an elevator 7 to carry out the grain carry-out. Through the conveyor 5, the elevator 7 and the upper conveyor 6, the grain is circulated through the path of the grain storage tank 2, the ventilation drying unit 3, the grain take-out tank 4, and the grain storage tank 2.

  The ventilation drying unit 3 alternately arranges a plurality of hot air supply cylinders 8 formed by a porous ventilation wall and a plurality of exhaust cylinders 9 formed by a porous ventilation wall to face the drying passage 10. The hot air supply cylinder 8 constituting the drying passage 10 communicates with the hot air supply chamber 11, and the exhaust air cylinder 9 communicates with the exhaust air chamber 12. A suction blower 13 is provided at one end of the exhaust air chamber 12. It has.

  The air exhaust chamber 12 forms a throttle-shaped wind tunnel so that the sectional area gradually decreases from one end side including the suction blower 13 toward the front side. In the embodiment shown in FIG. 1 to FIG. 3 and FIG. 5, a suction blower 13 is provided by providing the outer side wall 14 of the exhaust air chamber 12 so as to form an inclined surface that approaches the inside from the suction blower 13 side toward the front. The cross-sectional area is gradually reduced from the one end side toward the front side.

  Further, the exhaust air chamber 12 that forms a constricted wind tunnel so that the cross-sectional area gradually decreases from one end side provided with the suction blower 13 toward the front side, and the bottom surface 15 is inclined downward toward the suction blower 13 side. In addition, the inner wall surface 25 has a slope shape that approaches the outer side from the suction blower 13 side toward the front side (see FIG. 4), and the bottom surface 15 of the exhaust chamber 12 is a flat inclined surface shape as shown in the drawing, or a concave arc shape. Or an inclined surface such as a groove shape.

  The grain take-out tank 4 is formed by being surrounded by a drifted grain plate and both side walls that are inclined from both upper sides of the grain take-out tank 4 to the conveying basket of the grain carry-out conveyor 5. A far-infrared radiator 16 is disposed in the grain take-out tank 4, and the far-infrared radiator 16 has a cylindrical shape extending over the entire length of the grain take-out tank 4 in the front-rear direction. The far-infrared rays radiated from the far-infrared radiator 16 are fed from the drying passage 10 of the ventilation drying unit 3 by the rotation of the feeding roll 17, and the grains flow down in a granular or thin layer on the surface of the flown cereal plate. Is irradiated. At one end of the far-infrared radiator 16, a flame-radiating cylinder 19 of a gun-type burner 18 faces the axis, and on the exhaust side of the far-infrared radiator 16, an exhaust cylinder 20 is connected to the axis. .

  The far-infrared radiator 16 is freely rotatable by the rotary bearings at both ends, and the far-infrared radiator 16 obtains power from a part of the motor or the dryer main body and continuously rotates at a low speed. ing. The gun-type burner 18 and the exhaust pipe 20 are equipped with structures that do not hinder the rotation of the far-infrared radiator 16.

  The exhaust pipe 20 connected to the exhaust side of the far-infrared radiator 16 is connected to the hot air supply chamber 11, and a burner 18 provided in the far-infrared radiator 16 is a heat source required for drying, that is, far-infrared radiation. Satisfies the total amount of heat to generate radiation and warm air. An outside air intake 21 for sucking outside air is opened at a portion where the exhaust pipe 20 of the hot air supply chamber 11 is connected. That is, the hot air supply chamber 11 forms a suction air passage for sucking and circulating the outside air taken in from the outside air inlet 21, and the combustion exhaust heat air of the far-infrared radiator 16 is mixed with the intake outside air in the hot air supply chamber 11. The hot drying air is supplied to the ventilation drying unit 3.

  The grain drying apparatus according to the present invention can be configured as shown in FIG. That is, in another embodiment of the present invention, the hot air supply chamber 11 is also formed with a constricted wind tunnel so that the sectional area gradually decreases from the outside air and the exhaust hot air intake side from the far-infrared radiator 16 toward the front. For this purpose, the hot air supply chamber 11 is provided with an outer side surface 22 having a slope shape. Other configurations are the same as those shown in FIGS.

Incidentally, grain drying apparatus shown in FIGS. 2 to 5, the installation surface of the suction blower 13 of Haifushitsu 12, the configuration of the external air inlet 21 of the hot-air supply chamber 11 provided on the same side of the dryer body 1 current It is a thing.

  Combustion wind generated by the combustion of the gun type burner 18 enters the hot air supply chamber 11 from the outside air intake 21 through the exhaust pipe 20 from the far-infrared radiator 16 and is sucked from the outside air intake 21 by the suction blower 13. Are mixed in the hot air supply chamber 11 to form dry air, and are sucked into the exhaust air chamber 12 through the hot air supply cylinder 8, the drying passage 10, and the exhaust air cylinder 9, and discharged outside the apparatus.

  Normally, when the suction blower 13 and the outside air inlet 21 are provided on the same surface, the hot air supply cylinder 8, the drying passage 10, the exhaust wind cylinder close to the side surface including the outside air inlet 13 and the suction fan 13 are provided. However, in the exhaust air chamber 12, any one of the bottom surface 15, the outer side wall 14 and the inner wall surface 25 is inclined, and the outer side wall 22 of the hot air supply chamber 11 is further inclined. Since each of the cross sections reduces the area from the surface provided with the suction blower 13 and the outside air intake port 21 as an inclined surface, it is uniformly distributed over the entire area of the hot air supply chamber 11. In addition to being able to distribute the air volume of the dry air evenly, it is possible to increase the air speed in the portions where the cross-sectional areas of the exhaust air chamber 12 and the hot air supply chamber 11 are reduced.

  In addition, as shown in FIG. 4, by providing an auxiliary intake port 24 whose opening degree can be adjusted in a part of the front wall 23 of the exhaust air chamber 12 facing the suction blower 13 side, the air flow in the vicinity of the bottom surface 15 is changed to the auxiliary intake port. Since it is energized by the air sucked from 24, it is possible to more reliably prevent dust and the like from being discharged to the outside of the apparatus together with the exhaust air and accumulating on the bottom surface 15. In addition, the outer side wall 14 of the exhaust chamber 12 may be configured to be detachable or provided with an inspection port that can be opened and closed on the outer side wall 14 (not shown).

  According to the grain drying apparatus according to the present invention, the far-infrared radiator 16 irradiates far-infrared rays to the grain to be dried, thereby heating the inside of the grains in a relatively short time to transfer moisture to the surface, and By passing air to the surface of the grain to be dried, moisture can be quickly evaporated from the surface of the grain to be dried, and the grain to be dried can be efficiently dried in a relatively short time.

  And according to the grain drying apparatus which concerns on this invention, the cross-sectional area is gradually increased from the one end side provided with the suction air blower 13 to the front side by the exhaust chamber 12 with which the exhaust drum 9 of the ventilation drying part 3 is connected. By using the constricted wind tunnel so as to be small, the entire suction air volume in the exhaust air chamber 12 by the suction fan 13 can be kept uniform regardless of the distance from the suction fan 13. For this reason, the unevenness of the drying of the grain resulting from the nonuniformity of the amount of dry air which distribute | circulates the drying channel | path 10 of the ventilation drying part 3, and the nonuniformity of temperature distribution can be eliminated.

  Further, according to the grain drying device of the present invention, a sufficient air volume is maintained even at a position away from the suction blower 13 side in the exhaust air chamber 12, and a gradual cross-sectional area is increased toward the front side of the suction blower 13. Since the wind speed is reduced and the wind speed is increased, it is possible to prevent dust and the like from accumulating on the bottom 15 even at the location of the exhaust chamber 12 away from the suction blower 13. In particular, the dust accumulation preventive effect can be ensured by providing the configuration in which the bottom 15 shown in FIG. 4 is inclined downward toward the suction blower 13 and the adjustable auxiliary air port 24.

It is a longitudinal cross-sectional view of the whole grain drying apparatus which concerns on this invention. It is a perspective view which fractures | ruptures and shows a part of grain drying apparatus same as the above. It is a plane sectional view same as the above. It is a one part perspective view same as the above. It is a plane sectional view of the grain drying device concerning other embodiments of the present invention.

DESCRIPTION OF SYMBOLS 1 Dryer main body 2 Grain storage tank 3 Ventilation drying part 4 Grain extraction tank 5 Grain carry-out conveyor 6 Upper conveyor 7 Elevator 8 Hot air supply drum 9 Exhaust air drum 10 Drying passage 11 Hot air supply chamber 12 Exhaust air chamber 13 Suction blower 14 Outer side surface Wall 15 Bottom 16 Far-infrared radiator 17 Feeding roll 18 Gun type burner 19 Flame emitting cylinder 20 Exhaust cylinder 21 Outside air inlet 22 Outer side surface 23 Front wall 24 Auxiliary inlet 25 Inner wall surface

Claims (4)

The upper part of the dryer body has a grain storage tank, the middle part has a ventilation drying section, and the lower stage has a grain extraction tank. In the grain drying equipment that dries while
The ventilation drying unit alternately arranges a plurality of hot-air supply cylinders formed by the ventilation walls and a plurality of exhaust cylinders formed by the ventilation walls to form a drying passage,
The hot air supply drum constituting the drying passage communicates with the hot air supply chamber, and the exhaust wind drum communicates with the exhaust air chamber, and a suction blower is provided on one end side of the exhaust air chamber,
The exhaust air chamber has a constricted wind tunnel so that the cross-sectional area gradually decreases from one end side having a suction blower toward the front side, and the bottom surface is inclined downward toward the suction blower side. A grain drying apparatus characterized by the above. In the grain take-out tank, a far-infrared radiator that irradiates far-infrared rays to the grain flowing down from the ventilation drying section, this far-infrared radiator has a burner that serves as a heat source for drying,
2. The grain drying apparatus according to claim 1, wherein the exhaust heat exhausted from the far-infrared radiator is sucked and circulated through a hot air supply chamber communicating with a hot air supply cylinder constituting a drying passage.   The far-infrared radiator that irradiates the grain with far-infrared radiation is cylindrical and has a burner flame-radiating cylinder facing the axis of one end and a combustion hot-air exhaust cylinder connected to the other axis. 3. The structure according to claim 2, wherein the structure is configured so as to rotate about the core, and the exhaust heat exhausted from the far infrared radiator is sucked and circulated from one rotary bearing portion of the far infrared radiator to the hot air supply chamber. Grain drying equipment. Hot air supply chamber is not without a suction air passage for sucking flow of outside air, of claim 1, 2 or 3, wherein the mixing of the flue hot air of far infrared radiator to the intake fresh air in the hot air supply chamber Grain drying equipment.

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