JP4480157B2 - Grain drying method and apparatus - Google Patents

Description

  The present invention relates to a grain drying method and apparatus for drying a grain to be dried by ventilation and agitation while generating a whirling air current in a space separated from the outside and floating the grain to be dried by the whirling airflow. is there.

  Grain drying method, in which dried grains are dispersed and suspended in a swirling updraft of heated air generated in a cylindrical body, is attracting attention as a new drying preparation technology aimed at shortening drying time and improving quality. However, the method and apparatus for drying the granular material by swirling ascending air current are introduced in Japanese Patent No. 314512, Japanese Patent Laid-Open No. 11-230672, Japanese Patent Laid-Open No. 2002-350047 and Japanese Patent Laid-Open No. 2001-133150. Yes. Japanese Laid-Open Patent Publication No. 7-180959 discloses a drying apparatus for a granular material that blows hot air swirling from the bottom of the deposited layer of granular material supplied into the drum and dries it.

Japanese Patent No. 314512 JP-A-11-230672 JP 2002-350047 A JP 2001-133150 A JP 7-180959 A

  According to the drying method and apparatus using the swirling updraft of the granular material introduced by the above-mentioned Japanese Patent No. 314512, Japanese Patent Laid-Open No. 11-230672 and Japanese Patent Laid-Open No. 2002-350047, However, most of the powder to be dried moves up on the swirling updraft, so the hot air exchange action on the powder to be dried in the upward movement process In addition, the contact time with hot air in the moving route was short and the drying ability was inferior.

  For this reason, the drying method introduced in the above-mentioned Japanese Patent Laid-Open No. 2001-133150 aims to enhance the stirring, mixing, and dispersion during the upward movement of the granular material due to the swirling updraft. The drying method introduced by the publication No. -180959 attempts to enhance the stirring, mixing and dispersion by circulating hot air as a swirling flow through the accumulation layer of the granular material. When stirring, mixing, and dispersing actions are given, the drying ability can be improved, but the quality of the powder may be deteriorated because the powder is impacted.

Therefore, the present invention floats the grain to be dried by a swirling airflow and emits far infrared rays from a far-infrared radiation device provided at the axial center position of the swirling airflow to irradiate the to-be-dried grain by far-infrared radiation. Grain drying method that can efficiently dry dried grains that move in a swirling airflow without deteriorating quality by giving a heating effect, and shortening drying time and improving quality And an apparatus for the same.

In order to achieve the above object, the present invention proposes a grain drying method according to claims 1 and 2, and a grain drying apparatus according to claims 3 to 18. That is, in the grain drying method according to claim 1, a swirling airflow is generated in a space separated from the outside, and the dried grain is dried by ventilation and agitation while floating the dried grain by the swirling airflow. A drying method of the above , characterized in that far infrared rays are emitted from a far infrared ray emitting device provided at the axial position of the swirling air flow, and a heating effect by irradiation of far infrared rays is imparted to the floating grains to be dried. To do.

In the grain drying method according to claim 2, a swirling updraft is generated in a cylindrical space that forms a space separated from the outside, and ventilation by the swirling updraft is performed in the process of floating and lifting the grain to be dried by the swirling updraft. A method for drying grains to be dried by agitating action, wherein far-infrared radiation is emitted from a far-infrared radiation device provided at the axial center of the swirling updraft, and far-infrared radiation is applied to the grains to be dried It is characterized by giving a heating effect by irradiation.

  The grain drying apparatus according to claim 3 includes a drying tank having a cylindrical space separated from the outside, a far-infrared radiation device provided at an axial position of the cylindrical space of the drying tank, and the cylindrical shape of the drying tank. A blower that generates a swirling updraft in the space and a dried grain supply device that feeds the dried grain into the drying tank, and a far infrared radiation device is provided at the axial center of the cylindrical space of the drying tank. Further, the present invention is characterized in that it is configured to give a heating effect by irradiation with far-infrared rays to the dried grains that float and rise.

  According to a fourth aspect of the present invention, there is provided the grain drying apparatus according to the third aspect, wherein the far-infrared radiator of the far-infrared radiation device is provided over substantially the entire length of the cylindrical space of the drying tank.

  The grain drying apparatus according to claim 5 is the structure of claim 4, wherein the far-infrared radiation device emits far-infrared radiation by heating the far-infrared radiator with heated air or heated steam. It is characterized by this.

  According to a sixth aspect of the present invention, there is provided the grain drying apparatus according to the fourth aspect, wherein the far-infrared radiation device is configured to radiate far-infrared radiation by heating with the heat of combustion of fuel in the far-infrared radiation body. It is characterized by being.

  The grain drying apparatus according to claim 7 is the structure according to claim 3 or 4, wherein the cylindrical space of the drying tank is provided with a spiral next to reinforce the ascending swirling action of the dried grain floating and rising by the swirling updraft. It is characterized by that.

  The grain drying apparatus according to claim 8 is the structure according to claim 7, wherein the cylindrical space of the drying tank has a function of preventing the fall of the dried grain floating up and the next spiral or ascending dried grain rising. It is characterized in that either one or both of the following spirals having a floating promotion function are provided.

  The grain drying apparatus according to claim 9 is configured such that in the configuration of claim 3, 4, 5, 6, 7 or 8, the exhaust from the far-infrared radiation device is circulated through the cylindrical space of the drying tank. It is characterized by.

  The grain drying apparatus according to claim 10 is the structure according to claim 3, 4, 5, 6, 7, 8 or 9, wherein the cylindrical space of the drying tank has a dried grain supply side below and an upper covering. A part of the circulation path of the to-be-dried grain is formed with the dry grain sending side.

  The grain drying apparatus according to claim 11 is the structure of claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the grain storage tank is added to the drying tank, A drying grain circulation path is formed between the dried grain supply side and the dried grain delivery side of the cylindrical space via the grain storage tank.

  The grain drying apparatus according to claim 12 is characterized in that, in the configuration of claim 11, the exhaust from the far-infrared radiator of the far-infrared radiation device is circulated to the grain storage tank. .

  A grain drying apparatus according to claim 13 is the drying tank according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the drying tank is provided with a grain ventilation drying tank. A circulation path for dried grains is formed between the dried grain supply side and the dried grain delivery side of the cylindrical space via the grain ventilation drying tank.

  A grain drying apparatus according to a fourteenth aspect is characterized in that, in the configuration of the thirteenth aspect, the exhaust from the far-infrared radiator of the far-infrared radiation device is circulated through the grain ventilation drying tank. It is.

  The grain drying apparatus according to claim 15 is the structure of claim 11, 12, 13 or 14, wherein the exhaust from the far-infrared radiator of the far-infrared radiation device is supplied to a grain storage tank or a grain ventilation drying tank, It is configured to circulate through a drying tank.

  The grain drying apparatus according to claim 16 is the structure of claim 11 or 13, wherein there are a plurality of grain storage tanks or grain ventilation drying tanks attached to the drying tank, and they are parallel to the cylindrical space of the drying tank. It is characterized by being connected to.

  The grain drying apparatus according to claim 17 is characterized in that, in the configuration of claim 16, the plurality of grain storage tanks or grain ventilation drying tanks are arranged so as to surround the drying tank around the drying tank. To do.

  The grain drying apparatus according to claim 18 is the grain drying apparatus according to claim 17, wherein the plurality of grain storage tanks or grain ventilation drying tanks installed so as to surround the drying tank are dried grains in the cylindrical space of the drying tank. A shutter for opening and closing between the supply side or the delivery side and both is provided.

According to the grain drying method and apparatus according to the present invention, the to-be-dried grain is floated by the swirling airflow, and the far-infrared radiation is radiated from the far-infrared radiation device provided at the axial position of the swirling airflow. By applying a heating effect by irradiation of far-infrared rays to the dried grains to be dried, the dried grains moving on the swirling airflow can be efficiently dried without quality deterioration, shortening the drying time and quality The effect which can aim at improvement is acquired.

  FIG. 1 shows a first embodiment of a drying apparatus for carrying out the grain drying method according to the present invention. In the 1st form shown in FIG. 1, 1 is a drying tank. The drying tank 1 forms a cylindrical space separated from the outside, and the drying tank 1 is composed of a vertically long cylindrical body. A blower chamber 3 partitioned by a perforated plate 2 is formed at the lower part of the drying tank 1, and the upper part of the drying tank 1 is a drying chamber 4 that forms a long cylindrical space vertically.

A blower duct 5 is connected to the drying tank 1 in the tangential direction at the bottom of the drying chamber 4. Ventilation duct 5 is substantially at right angles connected to the axis of the cylinder, but rather it may also be connected with a shaft center connecting angle C of the cylindrical body as the air duct 5 ', the angle C is 90 ° A range of over 125 ° to 125 ° is preferable.

A supply hopper 6 for the dried grain b is connected to the blower duct 5 via a feeding part 7, and 8 is a feeding valve, which feeds the dried grain b into the drying tank 1. The apparatus 9 is configured. A blower 10 is connected to the blower duct 5, and the dried grain b is supplied to the tangential direction of the inner surface of the cylindrical body in the drying chamber 4 through the blower duct 5 by the compressed air from the blower 10. Inside, a swirling updraft a is generated. An air exhaust port 11 is opened at the top of the drying chamber 4 so that the dried grain b is discharged together with the swirling airflow and the rising airflow. A blower 13 is connected to the blower chamber 3 of the drying tank 1 via a blower duct 12, and is configured to blow air from the blower chamber 3 to the drying chamber 4 through the perforated plate 2. The blower 10 mainly plays a role of encouraging a swirling airflow, and the blower 13 mainly promotes a rising airflow. The air sent from the blowers 10 and 13 is a combustion air of fuel by a burner, an electric heat, or a heat generation by a heat pump. It may be warm air using as a heat source.

  Reference numeral 14 denotes a far-infrared radiation device, and reference numeral 15 denotes a far-infrared radiator. The far-infrared radiator 15 is provided at the axial center position of the drying tank 1 over substantially the entire length thereof. The far-infrared radiator 15 is an elongated cylindrical body, the lower end of which is a hot air supply unit 16, and the upper end is an exhaust port 17. The far-infrared radiation device 14 is configured to radiate far-infrared rays by heating with the combustion heat of the fuel in the far-infrared radiator 15 and to radiate far-infrared rays by heating with heated air or heated steam. Is. Further, the far-infrared radiator 15 can be heated by a heat pump, an electric heater or other electric heat source.

  In the grain drying apparatus configured as described above, a swirling updraft a is generated in the drying chamber 4 of the drying tank 1 by the air blown by the blower 10 (swirling air) and the rising air by the blower 13, and is formed in the lower portion of the drying chamber 4. The to-be-dried grain b to be carried in rises while swirling on the swirling updraft a, and is carried out from the upper exhaust port 11 together with the swirling updraft a. The to-be-dried grain b that rises while swirling on the swirling updraft a in the drying chamber 4 is irradiated with far-infrared rays by the far-infrared radiator 15 from the axial center position of the swirling updraft a, and is dried by blowing the swirling updraft. Combined with the action, a warming effect by far infrared rays is given, and the dried grains are dried evenly and efficiently.

5 is a plan cross section of FIG. 1, the state is to be dried grains b from the air duct 5 in the lower part of the drying chamber 4 in FIG. 5, "A" is introduced into the drying chamber 4, and 5 " “B” shows a state in which the dried grain b is discharged from the exhaust port 11 above the drying chamber 4, and the dried grain b is in the drying chamber 4 even between “A” and “B” in FIG. 5. A state in which the inner surface of the drying tank 1 is uniformly swung from the far-infrared radiator 15 at a constant interval is shown.

  The dried grain b that rises while turning on the swirl rising airflow a as described above receives the centrifugal force due to swirling as shown in FIG. 5, so that by adjusting the strength and amount of the swirl rising airflow, Around the infrared radiator 15, a floating layer of the dried grain b that is appropriately separated therefrom can be formed, and the dried grain b that forms the floating layer strongly adheres to the inner peripheral surface of the drying chamber 4. Since the state where it is not in contact can be maintained, drying can be equalized and the drying efficiency can be improved, and the impact acting on the dried grain b can be greatly reduced to greatly contribute to the improvement of quality.

As in the air duct 5 ', connecting I also connection angle C from the cylinder axis, with giving more the upward force on the whirling airflow to pivot in the direction also increases the drying grain b Therefore, the air volume of the blower 13 can be reduced, which leads to a reduction in power.

  Far-infrared rays that are effective for drying, that is, wavelengths that effectively vibrate water molecules are set to “2.66 μ”, “2.74 μm”, and “6.27 μm”. When converted to temperature, the temperatures are 816 ° C., 784 ° C., and 189 ° C. Therefore, in order to emit efficient far infrared rays, far infrared radiation is emitted to a temperature at which adverse effects occur when the dried grain b comes into contact with the far infrared radiator 15. It is also necessary to increase the surface temperature of the body 15. However, as shown in FIG. 5, the to-be-dried grain b swirls while maintaining a certain distance from the far-infrared radiator 15 by the centrifugal force of swirling, and receives far-infrared radiation uniformly, and the blowers 10 and 13 By adjusting the air volume, it is possible to change the number of swirling times and the time for receiving far-infrared rays, so that various kinds of applied drying of grains can be applied.

  FIG. 2 shows a second embodiment of a drying apparatus for carrying out the grain drying method according to the present invention. In the 2nd form shown in FIG. 2, 101 is a drying tank. The drying tank 101 forms a cylindrical space separated from the outside, and the drying tank 101 is formed of a long and narrow cylindrical body in the horizontal direction. The inside of the drying tank 101 forms a drying chamber 104 over its entire length, and a blower duct 105 is connected to one end in the left-right direction.

Air duct 105 is substantially at right angles connected to the axis of the cylinder but, but it may also be connected with a shaft center connecting angle C of the cylindrical body as the air duct 105 '. The connection angle C is preferably in the range of more than 90 ° and up to 125 °.

  A supply hopper 106 for the dried grain b is connected to the air duct 105 via a feeding unit 107, and 108 is a feeding valve, which feeds the dried grain into the drying tank 101. 109 is configured.

The blower duct 105 connected to the drying chamber 104 of the drying tank 101 is provided with a blower 110, and the compressed air supplied from the blower 110 through the blower duct 105 to the tangential direction of the inner surface of the cylindrical body in the drying chamber 104. Thus, to-be-dried grain b is supplied through the air duct 105 in the tangential direction of the inner surface of the cylindrical body in the drying chamber 104, and a swirling airflow is generated in the vertical direction that swirls up and down in the drying chamber 104. An air exhaust port 111 is opened at the other end of the drying chamber 104 so that the dried grain b is discharged along with the swirling airflow. Incidentally, the air from the blower 110, the combustion air of the fuel by the burner as in the first embodiment of the invention, or, but it may also the heat generation by electric heating or heat pump a hot air as a heat source.

  Reference numeral 114 denotes a far-infrared radiation device, and reference numeral 115 denotes a far-infrared radiator. The far-infrared radiator 115 is provided at the axial center position of the drying tank 101 over substantially the entire length. The far-infrared radiator 115 is an elongated cylindrical body, and has a hot air supply unit 116 at one end on the air duct 105 side and an exhaust port 117 in the other end direction on the air exhaust port 111 side. The far-infrared radiation device 114 is configured to radiate far-infrared rays by heating with the combustion heat of fuel in the far-infrared radiator 115, or to radiate far-infrared rays by heating with heated air or heated steam. Is. Further, the far-infrared radiator 115 can be heated by a heat pump, an electric heater or other electric heat sources.

  In the grain drying apparatus configured as described above, a swirling airflow is generated in the drying chamber 104 of the drying tank 101 by the air blown by the blower 110 (swirling air), and the to-be-dried grain b carried into the drying chamber 104 swirls. It is carried out with the swirling airflow from the air exhaust port 111 while swirling up and down on the airflow.

In addition, if it connects with the connection angle C from the axial center of a cylindrical body like air duct 105 ' , the flow of the wind which goes to the exhaust outlet 111 will generate | occur | produce more in a swirling airflow and the to-be-dried grain b, and to-be-dried grain quickly. b can be discharged from the drying chamber 104.

In the drying chamber 104, the to-be-dried grain b swirling in the swirling air current is irradiated with far infrared rays from the axial position of the swirling airflow by the far infrared radiator 115, and coupled with the drying action by the swirling airflow, the far infrared rays The drying effect is given evenly and efficiently.

And the to-be-dried grain b which swirls on a swirl airflow as mentioned above receives the centrifugal force by swirling similarly to the plane cross section of the 1st form shown in FIG. By adjusting, the far-infrared radiator 115 is appropriately separated from the far-infrared radiator 115 and forms a floating layer of the dried grain b that rotates while maintaining a certain distance from the far-infrared radiator 115 so that the far-infrared radiation 115 is uniformly distributed. together receive radiation, the object to be dried grains b to form a floating layer is able to keep a strong state not in contact with the internal peripheral surface of the drying chamber 104, improvement in equalization and drying efficiency of the drying is achieved, moreover The impact which acts on the to-be-dried grain b can be reduced significantly, and it can contribute greatly to the improvement of quality.

  FIG. 3 shows a third embodiment of a drying apparatus for carrying out the grain drying method according to the present invention. In the 3rd form shown in FIG. 3, 201 is a drying tank. The drying tank 201 forms a cylindrical space, and the drying tank 201 is composed of a vertically long cylindrical body. The inside of the drying tank 201 forms a drying chamber 204 that forms a vertically long cylindrical space over substantially the entire length, and a blower duct 205 is connected to the upper part thereof. A dry hopper supply hopper 206 is connected to the blower duct 205 via a feeding unit 207, and 208 is a feeding valve, which is a dried grain supply device 209 that feeds the dried grain into the drying tank 201. Is configured.

  The blower duct 205 connected to the drying chamber 204 of the drying tank 201 is provided with a blower 210, and the compressed air supplied from the blower 210 through the blower duct 205 in the tangential direction of the inner surface of the cylindrical body in the drying chamber 204. Carries the grain b to be dried into the drying chamber 204 through the air duct 205, and generates a downward swirling airflow in the drying chamber 204.

As the air duct 205 is substantially at right angles connected to the axis of the cylinder, but the air duct 205 ', connecting angle C with a rather good be connected, the angle C is to 125 ° beyond the 90 ° The range is good.

In the lower part of the drying chamber 204, an air exhaust port 211 is opened so that the grain b to be dried is discharged together with the swirling descending airflow. Note that air blown by the blower 210, the combustion air of the fuel by the burner or, but it may also the heat generation by electric heating or heat pump a hot air as a heat source.

  Reference numeral 214 denotes a far-infrared radiation device, and reference numeral 215 denotes a far-infrared radiator. The far-infrared radiator 215 is provided at the axial center position of the drying tank 201 over substantially the entire length thereof. The far-infrared radiator 215 is an elongated cylindrical body, the lower part thereof being a hot air supply part 216, and the upper part being an exhaust port 217. The far-infrared radiation device 214 is configured to radiate far-infrared rays by heating with the combustion heat of the fuel in the far-infrared radiator 215, or to radiate far-infrared rays by heating with heated air or heated steam. Is. Further, the far-infrared radiator 215 can be heated by a heat pump, an electric heater, or another electric heat source.

FIG. 4 shows another example of the third embodiment of the drying apparatus for carrying out the grain drying method according to the present invention. In another example of the fourth embodiment shown in FIG. 4, reference numeral 301 denotes a conical cylindrical drying tank. The conical cylindrical drying tank 301 has an inverted conical shape in which the diameter of the drying tank is reduced downward, and an air exhaust port 311 is provided at the lower end of the cone. Also it has good inner tube 302 be set only above the axis of the conical tubular drying chamber 301.

In addition , the throwing-in apparatus of the to-be-dried grain b, the ventilation duct 205 ' which shows the throwing angle, its connection angle C, and a far-infrared radiation structure are the same as that of FIG.

  In the grain drying apparatus of FIG. 3 configured as described above, a swirling descending airflow is generated in the drying chamber 204 of the drying tank 201 by the blower (swirling air) by the blower 210 and is carried into the drying chamber 204. The grain b is carried out together with the swirling and descending airflow from the air outlet 211 while swirling and falling by the swirling and descending airflow. The to-be-dried grain b swirling in the swirling airflow in the drying chamber 204 is irradiated with far-infrared rays from the far-infrared radiator 215 from the axial center position of the swirling airflow, coupled with the drying action by the swirling downflow airflow. The effect of heating by infrared rays is given, and the dried grains are dried evenly and efficiently.

Also in the grain drying apparatus shown in FIG. 4, the to-be-dried grain b that is carried into the drying chamber 304 is generated by the swirling and descending airflow generated by the blower 210 blown into the drying chamber 304 of the conical cylindrical drying tank 301. The air is exhausted along with the swirling descending airflow from the air exhaust port 311 while gradually swirling and falling on the inner surface of the conical cylindrical drying tank 301 having an inverted conical shape. The action of the far-infrared radiation is the same as in FIG. 3, but if the inner cylinder 302 is provided above the conical cylindrical drying tank 301 with the far-infrared radiator 215 as an axis as shown in FIG. Since the swirl force is applied to the dried grain b and then discharged from the inner cylinder 302, the swirl descending airflow that blows out along with the dried grain b discharged from the exhaust port 311 can be reduced, and the subsequent transport of the dried grain b can be carried out. Ru can be easily performed.

In the third embodiment shown in FIGS. 3 and 4, the dried grain b that swirls in the swirling descending airflow is also subjected to centrifugal force due to swirling, as in the plane cross section of the first embodiment shown in FIG. 5. Therefore, by adjusting the strength and amount of the swirling airflow, the far-infrared radiator 215 is appropriately separated from the periphery of the far-infrared radiator 215, and the dried grain b that swirls while maintaining a certain distance from the far-infrared radiator 215. can form a floating layer, Ru can receive uniform far-infrared radiation.

  The dried grain b forming the floating layer is kept in a state where it does not come into strong contact with the inner peripheral surfaces of the drying chambers 204 and 304, and the drying is equalized and the drying efficiency is improved, and the impact acting on the dried grain b Can be greatly reduced to greatly improve quality.

Incidentally, FIG. 3, as the air duct 205 'shown in FIG. 4, the connection angle if C is connected I also, be dried grains b are more times over the inner cylinder or inverted conical tube or a number of times Since the turning is performed, it is possible to receive more far-infrared radiation from the far-infrared radiator 215, and the drying efficiency is further improved.

Example in FIG. 13 from FIG. 6 is a first embodiment, i.e. drying apparatus grain utilizing swirl updraft a preferred embodiment of the present invention, illustrating the respective embodiments below with reference to FIG. .

Example 6 1, Ru example der the drying chamber was next helical provided 1 of the inner surface of the drying chamber 4 to form a cylindrical space of the drying chamber 1. Helix next reinforces the upwardly whirling action of the dry cereal b floating rises it may also be provided over substantially the entire length Iga, by respectively turning updraft in the upper and lower portions of FIG. 6 in the drying chamber 4 of the drying chamber 4 A spiral next 35, 36 can be provided. The upper spiral next 35 also has a function of preventing the fall of dried grain b that floats and rises, and the lower spiral next 36 also has a function of promoting ascending and floating of swirling dried grain b. Both may be provided.

The to-be-dried grain b is passed from the to- be-dried grain supply device 9 through the blower duct 5 by the blower 10 and guided into the drying chamber 4. Since entered the drying chamber 4 to be dried cereal b is guided helically next 36 inclined upward toward the turning direction is the turning upward the prompting, porous air volume of the blower 10 and 13 be slightly less The dried grain b rises on the plate 2 without staying.

Further, depending on the air volume of the blowers 10 and 13, the dried grain b rises near the discharge port 11, and a phenomenon occurs in which the discharge is not continuously performed because it swirls while repeatedly falling, but rises with respect to the turning direction. by providing the helical next 35 having a slope that makes it possible to continuously and uniform discharge of the dried grain b.

In the second embodiment shown in FIG. 7, the exhaust of the far-infrared radiator 15 of the far-infrared radiator 14 is returned to the drying chamber 4 and the blower chamber 3 of the drying tank 1 and circulated in the configuration shown in FIG. is there. In FIG. 7, the exhaust from the far-infrared radiator 15 is returned from the exhaust port 17 to the drying chamber 4 and the blower chamber 3 via the blowers 10 and 13, but the exhaust is returned to one of the blowers and returned to the drying chamber 4. or but it may also be one or the other of the exhaust air circulation of the air chamber 3.

When the hot air supply unit 16 is burner burning, the dried grain b absorbs far infrared rays generated from the far-infrared radiator 15 due to burning of the burner while raising and turning in the drying chamber 4, and the grain internal temperature rises. To do. The to-be-dried grain b whose internal temperature has risen moves the moisture inside to the surface, and the moisture is removed from the surface of the to-be-dried grain b by the air blown by the swirling rising wind and dried. By circulating the high-temperature exhausted air burned in the far-infrared radiator 15 again to one or both of the blowers 10 and 13, the temperature of the swirling updraft a rises and moves to the surface of the dried grain b. it is possible to remove more water, drying efficiency is intended to upper direction.

  In Example 3 shown in FIG. 8, the grain storage tank 18 is provided in the drying tank 1, the grain supply port 19 at the upper part of the grain storage tank 18 is communicated with the air outlet 11 of the drying tank 1, and the grain feeding at the lower part is performed. The drying chamber 4 having the opening 20 connected to the air duct 5 and forming the cylindrical space of the drying tank 1 is located between the dried grain supply side below and the dried grain delivery side above. A part of the circulation path of the grain to be dried is formed through the grain storage tank 18. 21 is a delivery valve, 22 is an exhaust port.

In the apparatus of Example 3 shown in FIG. 8, to-be-dried grain b is put into the grain storage tank 18, but the to-be-dried grain b is fed from the grain storage tank 18 by the feed valve 21 and dried through the air duct 5. It is supplied to the drying chamber 4 of the tank 1 and rides on the swirl rising air current a and is dried by the heating action by the swirl rising air current a and the far infrared rays irradiated from the far infrared radiator 15 while ascending. The to-be-dried grain b is returned to the grain storage tank 18 from the air outlet 11 of the drying chamber 4 and sequentially circulated and dried with the drying chamber 4. Incidentally, after the transition from the turning updraft a is exhaust outlet 11 in the grain storage tank 18 is discharged from the exhaust port 22 to the outside of the machine, also be dried grains b discharged I also momentum of the grain storage tank 18 A cyclone configuration that can swirl and fall may be used. When the dried grain b swirls and falls in the grain storage tank 18, the swirl rising air flow a and the exhaust air from the exhaust port 17 are mixed and the inside of the grain storage tank 18 is mixed. turning is ventilated, and is exhausted from subsequent exhaust port 22 the drying efficiency is above improvement.

  Example 4 shown in FIG. 9 has a structure in which the grain storage tank 18 shown in FIG. 8 is replaced with a grain ventilation drying tank 23, and the grain supply port 24 at the top of the grain ventilation drying tank 23 is connected to the drying tank 1. It is configured to communicate with the air exhaust port 11 and connect the lower grain discharge conveyor 25 to the lowermost supply port 26 of the drying chamber 4. The grain ventilation drying tank 23 is provided with a suction ventilator 27. 28 is a feeding valve.

In the fourth embodiment, the exhaust port 17 of the far-infrared radiator 15 of the far-infrared radiation device 14 provided in the drying tank 1 is open near the top of the drying chamber 4 and the grain supply port 24 of the grain ventilation drying tank 23. Te, since the upper exhaust from the far infrared radiator 15 is mixed with swirling updraft a deposition cereals layer grain circulation drying chamber 23 so as to flow in the direction of the lower, passes through the deposition grain layer The water temperature of the grain can be efficiently removed by raising the temperature of the wind.

  Example 5 shown in FIG. 10 is a variation of that shown in FIG. 9, wherein the flow passage 30 of the drying chamber 29 of the grain ventilation drying tank 23 is a porous ventilation surface, and the inner side surface is a lower grain feeding chamber 31. In addition, the grain feed chamber 31 is provided with a suction exhauster 32 and the grain to be dried that flows down from the far-infrared radiator 15 of the far-infrared radiation device 14 through the flow path 30 is provided. The layers are circulated and discharged from the grain feeding chamber 31 to the outside by the suction exhaust fan 32. Grain b to be dried is stored in the drying chamber 29 from the exhaust port 11 by the momentum of the discharge of the swirling updraft a, and the separated swirling upflow a will pass through the grain layer of the flowing grain path 30 to dry the grain. It is what.

  In addition, in the thing of this structure, the drying chamber which forms the cylindrical space of the drying tank 1 by supplying the exhaust_gas | exhaustion discharged | emitted from the suction exhauster 32 to the air blowers 10 and 13 like Example 6 shown in FIG. 4 can be distributed.

In Example 7 shown in FIG. 12, a plurality of grain ventilation drying tanks 23 shown in FIGS. 10 and 11 are provided and provided in the drying chamber 4 of the drying tank 1 through the blower 33 provided in each grain ventilation drying tank 23. It is also possible to use a configuration in which the supply is performed by the supply conveyor 34. Note Although not shown, may be introduced into the drying chamber 4 through the blower 10 from the blower 33, in this case, the feed conveyor 34 supply port 26 is shall be omitted.

In the seventh embodiment, a plurality of grain ventilation drying tanks 23 provided in the drying tank 1 are connected in parallel to the drying chamber 4 that forms the cylindrical space of the drying tank 1. is there.

Example 8 shown in FIG. 13, in which are arranged a grain ventilation drying tank 23 of the plurality groups so as to surround it around the drying tank 1. The plurality of grain ventilation drying tanks 23 installed so as to surround the drying tank 1 are provided with shutters 37 that open and close between the dry grain supply side or the delivery side of the cylindrical space of the drying tank 1 and both. Good.

FIG. 13 is a schematic cross-sectional view of a portion connected by a connection duct 38 that connects the discharge port 11 of the drying tank 1 and the upper part of the grain ventilation drying tank 23, and a pair of shutters 37 are provided in each grain ventilation drying tank 23. in a state the shutter 37 is closed, which is provided on the outlet 11, the inner periphery of the drying chamber 4 rather by the a substantially without any step sealable structure, also there shutter 37 is opened, the dried cereal It is preferable that b has a shape that can enter the connection duct 38 without resistance.

  The grain drying tank 23 shown in the seventh embodiment of FIG. 12 and the eighth embodiment of FIG. 13 may have the structure of the grain storage tank 18.

The grain drying method and apparatus according to the present invention are mainly used for drying straw , but it is used for drying various grains such as wheat , soybeans, red beans, millet and other agricultural products, foods, medicines, fertilizers, moisture adjustment, ingredients Wide range of use, such as adjustment, blending, etc.

It is sectional drawing which shows typically fundamental embodiment of the drying apparatus of the grain which concerns on this invention. It is sectional drawing which shows typically 2nd Embodiment of the drying apparatus of the grain which concerns on this invention. It is sectional drawing which shows typically 3rd Embodiment of the drying apparatus of the grain which concerns on this invention. It is sectional drawing which shows typically the other example of 3rd Embodiment of the drying apparatus of the grain which concerns on this invention. It is a top sectional view of Drawing 1 of a basic embodiment of a grain drying device concerning the present invention. It is sectional drawing which shows Example 1 of FIG. 1 of fundamental embodiment of the drying apparatus of the grain which concerns on this invention. It is sectional drawing of Example 2 which shows typically the aspect which was made to circulate the exhaust_gas | exhaustion from the far-infrared radiator of a far-infrared radiator in the drying tank in the basic embodiment of FIG. It is sectional drawing of Example 3 which shows typically the form which provided the grain storage tank together with the drying tank of the basic form of FIG. It is sectional drawing of Example 4 which shows typically the form which provided the grain ventilation drying tank side by side with the drying tank of the basic form of FIG. It is sectional drawing of Example 5 which shows typically the aspect of what is shown in FIG. It is sectional drawing of Example 6 which shows the modification of what is shown in FIG. 10 typically. It is sectional drawing of Example 7 which shows typically the aspect which provided two or more grain ventilation drying tanks of what is shown in FIG. It is sectional drawing of Example 8 which shows typically the aspect which has arrange | positioned so that the multiple grain ventilation drying tank of what is shown in FIG. 12 may be surrounded centering on a drying tank.

DESCRIPTION OF SYMBOLS 1 Drying tank 2 Porous board 3 Blower chamber 4 Drying chamber 5 Blower duct 5 'Blower duct 6 Feeding hopper 7 Feeding part 8 Feeding valve 9 Dried grain supply apparatus 10 Blower 11 Exhaust port 12 Blower duct 13 Blower 14 Far-infrared radiation apparatus 15 Far-infrared radiator 16 Hot air supply unit 17 Exhaust port 18 Grain storage tank 19 Grain supply port 20 Grain feed port 21 Feed valve 22 Exhaust port 23 Grain ventilation drying tank 24 Grain supply port 25 Grain discharge conveyor 26 Supply port 27 Suction exhaust fan 28 Feeding valve 29 Drying chamber 30 Grain passage 31 Grain feeding chamber 32 Suction exhaust fan 33 Blower 34 Supply conveyor 35, 36 Next spiral 37 Shutter 38 Connection duct 101 Drying tank 104 Drying chamber 105 Blower duct 105 ' Blower duct 106 Supply hopper 107 Part 108 Feeding valve 109 Dried grain Material supply device 111 Exhaust port 114 Far-infrared radiation device 115 Far-infrared radiation device 116 Hot-air supply unit 117 Exhaust port 201 Drying tank 204 Drying chamber 205 Blowing duct 205 ' Blowing duct 206 Feeding hopper 207 Feeding unit 208 Feeding valve 209 Feeding dried grains Device 211 Exhaust outlet 214 Far-infrared radiation device 215 Far-infrared radiator 216 Hot air supply unit 217 Exhaust port 301 Conical cylindrical drying tank 302 Inner cylinder 304 Drying chamber 311 Exhaust outlet a Swirling updraft b Dried grain C Connection angle

Claims (18)

A method for drying a grain, wherein a swirling airflow is generated in a space separated from the outside, and the dried grain is dried by aeration and agitation while floating the dried grain by the swirling airflow,
A method for drying a grain, wherein far-infrared radiation is emitted from a far-infrared radiation device provided at the axial center position of the swirling airflow, and a heating effect by irradiation with far-infrared radiation is imparted to a floating grain to be dried. Grains that produce a swirling updraft in a cylindrical space that forms a space separated from the outside, and dry the dried grains by the aeration and stirring action of the swirling updraft in the process of floating and lifting the dried grains by this swirling updraft. A drying method of
A method for drying a grain, characterized in that a far infrared ray is radiated from a far infrared radiation device provided at the axial center position of the swirling updraft to provide a heating effect by irradiation of far infrared rays to a dried grain that floats and rises . A drying tank having a cylindrical space separated from the outside, a far-infrared radiation device provided at the axial center of the cylindrical space of the drying tank, and a blower that generates a swirling updraft in the cylindrical space of the drying tank And a dried grain supply device for feeding dried grains into the drying tank,
Grain drying characterized in that a far-infrared radiation device is provided at the axial center of the cylindrical space of the drying tank so that a heating effect by irradiation of far-infrared rays is imparted to the grains to be dried floating and rising apparatus.   4. The grain drying apparatus according to claim 3, wherein the far-infrared radiator of the far-infrared radiation apparatus is provided over substantially the entire length of the cylindrical space of the drying tank.   5. The grain drying apparatus according to claim 4, wherein the far-infrared radiation device is configured to radiate far-infrared radiation by heating the far-infrared radiator with heated air or heated water vapor.   5. The grain drying apparatus according to claim 4, wherein the far-infrared radiation device is configured to radiate far-infrared radiation by heating with combustion heat of fuel in the far-infrared radiation body.   5. The grain drying apparatus according to claim 3, wherein the cylindrical space of the drying tank is provided with a spiral that reinforces the ascending and swirling action of the grain to be dried that floats and rises due to the swirling updraft.   In the cylindrical space of the drying tank, either or both of the upper spiral following the function of preventing the falling of floating dry grains and the lower spiral following the function of promoting the rising and floating of swirling dry grains are provided. 8. The grain drying apparatus according to claim 7, further comprising:   9. The grain drying apparatus according to claim 3, 4, 5, 6, 7 or 8, wherein the exhaust from the far-infrared radiation device is circulated in a cylindrical space of the drying tank.   The cylindrical space of the drying tank forms a part of the circulation path of the dried grain between the dried grain supply side below and the dried grain delivery side above. The grain drying apparatus according to 4, 5, 6, 7, 8, or 9.   A grain storage tank was added to the drying tank, and a circulation path for dried grains was formed between the dried grain supply side and the dried grain delivery side of the cylindrical space of the drying tank via the grain storage tank. The grain drying apparatus according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.   12. The grain drying apparatus according to claim 11, wherein the exhaust from the far-infrared radiator of the far-infrared radiator is circulated in the grain storage tank.   Grain ventilation drying tank is added to the drying tank, and a circulation path for dried grains is formed between the dried grain supply side and the dried grain delivery side in the cylindrical space of the drying tank via the grain ventilation drying tank. The grain drying apparatus according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.   14. The grain drying apparatus according to claim 13, wherein the exhaust from the far-infrared radiator of the far-infrared radiator is configured to circulate through the grain ventilation drying tank.   The exhaust from the far-infrared radiator of the far-infrared radiator is supplied to a grain storage tank or a grain ventilation drying tank and is circulated through the drying tank. Description grain drying equipment.   14. The grain drying tank according to claim 11 or 13, wherein there are a plurality of grain storage tanks or grain ventilation drying tanks attached to the drying tank and connected in parallel to the cylindrical space of the drying tank. apparatus.   The grain drying apparatus according to claim 16, wherein the plurality of grain storage tanks or grain ventilation drying tanks are arranged so as to surround the drying tank with the drying tank as a center.   A plurality of grain storage tanks or grain ventilation drying tanks installed so as to surround the drying tank are provided with shutters that open and close between the dried grain supply side or the delivery side and both of them in the cylindrical space of the drying tank. The grain drying apparatus according to claim 17.

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