JPH02267485A - Dehumidifier for cereals drier - Google Patents

Abstract

PURPOSE:To completely dry with high thermal efficiency at small expenses by providing a dehumidifying rotor installed in a drying air passage for dehumidifying the atmosphere in a dehumidifying air passage, and a thermal conductor for heating the atmosphere in the dehumidifying passage humidified in the drying passage. CONSTITUTION:A cereals drier 1 is composed of a cereals thermal refiner 2 and a drying unit 3. The unit 3 has a dehumidifier 4, and a gas discharger 5. The unit 3 is formed with a drying passage 8 in which cereals are fed down from a screen 11 opened with a plurality of holes which pass dry air generated from the dehumidifier 4. A drying air passage 9 and a dehumidifying air passage 10 are provided in the dehumidifier 4, and a dehumidifying rotor 15 and a thermal conductor 16 are provided with respect to the two passages. A heater 14 is provided in the passage 9 to heat the conductor 16 after the rotor 15 is dehumidified. After the atmosphere is previously dehumidified by the rotor 15 in the passage 10, the atmosphere dehumidified by the conductor 16 is heated and introduced into the unit 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dehumidifying device for a grain dryer that dehumidifies and dries grain using dry air obtained by dehumidifying outside air.

[Conventional technology]

The conventional technology for drying grains consists of a tempering tank on top,
In a dryer with a circulation structure in which a drying section with multiple channels is provided at the bottom and the upper and lower sections are connected by the drying section, dry air that has been heated by a burner or the like to lower the relative humidity is placed in the lower drying section. is introduced to absorb moisture from the grain in the drying area,
The system was designed to exhaust humid air to the outside of the drying section.

Further, the grain dryer described in Japanese Utility Model Application Publication No. 58-141191 is provided with a dry dehumidifying device in the drying hot air flow path from the hot air generator to the grain drying passage of the dryer main body.

[Problem that the invention seeks to solve]

In the above conventional technology, the hot air generated by the hot air generating device is introduced into the grain drying passage either as it is or through a dehumidifying device, so the hot air generating device is, for example, an oil burner or the like. If there were, the smell from the burner and the soot generated when the burner was not burning often adhered to the grains. For this purpose, instead of directly introducing the hot air from the hot air generator into the grain drying path, a dry dehumidifier is installed in a separate hot air path, and the hot air in the hot air path dehumidifies part or all of the inside of the dry dehumidifier. Some dry dehumidifiers absorb moisture from the humid outside air and introduce it into the grain drying passage as dry air. Although the absolute humidity of the outside air is low, when it is dehumidified by the dry dehumidifier, the outside air temperature is further lowered, resulting in low-temperature dry air. efficiency was poor.

It is an object of the present invention to provide a dehumidifying device for a grain dryer that solves the problems caused by the hot air generator, has good thermal efficiency, and can complete drying at a low cost.

[Means to solve the problem]

According to the present invention, there is provided a dehumidifying device for a grain dryer that dehumidifies and dries the grain by introducing dry air obtained by dehumidifying outside air into a drying frame in which grain is stored, and is provided with a heating device such as a burner. a drying air passageway that introduces, warms, and exhausts outside air;
A dehumidifying air passage is provided for introducing dehumidified outside air into the drying frame, and in conjunction with the drying air passage and the dehumidifying air passage, the drying air passage dehumidifies the outside air, and the dehumidifying air passage dehumidifies the outside air. The above problem is solved by providing a dehumidifying rotating body and a heat conductor that is heated in the drying air passage and heats the outside air in the dehumidifying air passage.

[For production]

According to the present invention, a drying air passage and a dehumidifying air passage are provided, and a dehumidifying rotating body and a heat conductor are provided in association with the two air passages, and a heating device is used to dehumidify the drying air passage. After dehumidifying the rotating body, the heat conductor is heated,
In the dehumidifying air passage, the dehumidifying rotating body dehumidifies the outside air, and then the dehumidified outside air is heated by the heat conductor and introduced into the drying frame where the grain is stored, so that the drying air passage is heated. The hot air generated by the device further warms the heat conductor after dehumidifying the dehumidifying rotating body, so the temperature of the hot air generated by the heating device is efficiently absorbed.

Further, in the dehumidifying air passage, the dehumidifying rotating body is dehumidified in the drying air passage, so it dehumidifies the outside air in the dehumidifying air passage and lowers the absolute humidity.

Since the heat conductor is heated in the drying air passage, it acts to further warm the outside air dehumidified by the dehumidifying rotating body of the dehumidifying air passage and lower the relative humidity.

Furthermore, since the hot air from the heating device is not directly introduced into the drying frame, odor generated from the heating device and soot during non-combustibility do not adhere to the grains.

In addition, since a part of the dry air dehumidified by the dehumidifying rotary body of the dehumidifying air passage is introduced into the drying air passage, a portion of the dry air dehumidified by the dehumidifying rotary body of the dehumidifying air passage is introduced into the drying air passage. Dehumidification is also carried out efficiently because the introduced air is already dry air.

〔Example〕

A first preferred embodiment of the invention is shown in FIGS. 1 and 2. FIG.

First, reference numeral 1 is a grain dryer according to the present invention.

The grain dryer 1 is composed of a grain conditioning section 2 and a drying section 3, and the drying section 3 is equipped with a dehumidifying device 4 of the present invention and an exhaust device 5 that sucks and exhausts moist air passing through the drying section. have. Furthermore, it is provided with a cross-feeding conveyor 6 for carrying out the grains flowing down the drying section 3 to the outside of the machine, and an elevator 7 that is connected to the cross-feeding conveyor 6 and that feeds and circulates the grains to the tempering section 2.

A drying channel 8 is formed in the drying section 3 through which the grains flow down by a screen 11 having a plurality of holes through which dry air generated from the dehumidifying device 4 passes, and this drying channel 8 is connected to the tempering section 2. Needless to say, it is connected to

Next, the dehumidifying device 4 of the present invention will be described in detail.

The dehumidifying device 4 includes a drying air passage 9 and a dehumidifying air passage 10.
are provided in communication with the drying section 3, the drying air passage 9 communicates with the exhaust device 5, and the dehumidifying air passage 10 allows dry air to pass through each drying channel 8 formed by a screen 11 and be exhausted. It is connected so that it collects in the duct 12 of the device 5 and is exhausted by the exhaust device 5.

The outside air introducing portion 13 of the dehumidifier 4 provided in connection with the drying air passage 9 and the dehumidifying air passage 10 includes a dehumidifying rotating body 15 and a heat conductor 16, and the drying air passage 9 has a heated The device 14 (in this case, an oil burner) is provided.

The dehumidifying rotary body 15 and the heat conductor 16 are rotatably mounted on a drive device 17. This dehumidifying rotary body 15 is provided with a recyclable moisture absorbing material 18, and its cross-sectional shape has a shape with good air permeability. In addition, the heat conductor 16 easily absorbs heat.
It has a shape with good ventilation by providing a large number of fins 19 with a large surface area for easy heat dissipation. The hygroscopic material 18 is made of any commonly used highly hygroscopic material, and the thermal conductor 16 is made of any material with good thermal conductivity.

The effect of the above configuration will be explained. First, to explain the flow of grains to be dried, the grains loaded into the tempering section 2 from the outside flow into the drying channel 8 and are installed in an intermittent discharge device (not shown) between the drying section 3 and the lateral conveyor 6. ) is intermittently discharged onto the traverse conveyor 6. The grains discharged onto the lateral conveyor 6 are conveyed to the elevator 7, and then fed into the tempering section 2 again from the elevator 7. While flowing down the drying channel 8, the grain is dehumidified by dry air from the dehumidifier 4. In the tempering section 2, the grain is tempered so that the moisture content of the dehumidified grains is balanced.

On the other hand, in the dehumidifying device 4, by driving the exhaust device 5, outside air is introduced from the outside air introduction portion 13 of the drying air passage 9 and the dehumidifying air passage 10, passes through each of the air passages, and from the drying air passage 9, the outside air is 5, air from the dehumidifying air passage 10 passes through the respective screens 11, the drying channel 8, and the screen 11, is collected in the duct 12, and is exhausted from the exhaust device 5.

When the dehumidifying rotary body 15 and the heat conductor 16 are rotated by the drive of the drive device 17 of the dehumidifying device 4 and the heating device 14 starts heating, first the dehumidifying rotary body in the drying air passage 9 rotates. 1
The hygroscopic material 18 of No. 5 is heated by a heating device, and dry air with low relative humidity is passed through the hygroscopic material 18 to cause the moisture contained in the hygroscopic material 18 to be included in the dry air, thereby drying the hygroscopic material 18. In addition, the moisture absorbing material 18
The air that has passed through while containing moisture passes through the drying air passage 9 and is exhausted to the outside of the machine by the exhaust device 5, but the air that has passed through the dehumidifying rotor 15 further passes through the fins 19 of the heat conductor 16. The fins 19 of the heat conductor 16 are heated as they pass through the heat conductor 16 while touching them. The dehumidifying rotating body 15 and the heat conductor 16, which have been acted upon in the drying air passage in this way, are rotated by the drive device 17 and enter the dehumidifying air passage 10.

Outside air is flowing into the dehumidifying air passage 10 by the suction of the exhaust device 5, but when the dried moisture absorbing material 18 portion of the dehumidifying rotating body 15 enters the dehumidifying air passage 10,
The inflowing outside air passes through the moisture absorbing material 18, absorbs moisture, and becomes dry air. Further, the dry air is heated by the action of the fins 19 of the heat conductor 16, and the dry air is heated by the action of the fins 19 of the heat conductor 16,
By passing through the fins 8, the absolute humidity can be reduced, and by the action of the fins 19, the relative humidity can be reduced. The extremely low-humidity dry air that has been subjected to moisture absorption and heating is introduced into the drying channel 8 of the screen 11 by suction by the exhaust device 5, and absorbs moisture from the grains flowing down inside the drying channel 8. The air passes through the duct 12 and is exhausted from the exhaust device 5 to the outside of the machine.

Next, a second embodiment will be explained with reference to FIGS. 3 and 4. In this embodiment, components having the same configuration as those in the first embodiment are designated by the same reference numerals, and since the explanation of this embodiment also overlaps with that of the first embodiment, the explanation will be limited to only the different parts.

In the second embodiment, the heat conductor 20 of the dehumidifier 4 is formed by a heat exchanger.

The air with low relative humidity heated by the heating device 14 dehumidifies the remaining area of the dehumidifying rotating body 15, further heats the heat exchanger of the heat conductor 20, and is exhausted to the outside of the machine by the exhaust device i15. .

On the other hand, the dehumidifying rotary body 15 is rotated by the drive device 17, and the dehumidifying air passage 10 is moved from the outside air introduction section by the exhaust device 5.
absorbs moisture from the outside air. The moisture-absorbed outside air becomes dry air, which is further heated by the heat exchanger 20 heated in the drying air passage 9, and the dry air with low absolute humidity is further formed into dry air with low relative humidity by the screen 11. The moisture in the grains flowing down the drying channel 8 is absorbed, collected in the duct 12, and discharged to the outside of the machine by the exhaust device 5.

Since the heat conductor 20 is formed by an exchanger, the rotating part is only the dehumidifying rotating body 15, and the configuration is simple.
The dehumidifying rotating body 1 in the dehumidifying air passage efficiently heats the air.
The dry air dehumidified in step 5 can be heated.

Finally, a third embodiment will be described. As in the second embodiment, components having the same configuration as those in the first and second embodiments are designated by the same reference numerals, and overlapping explanations will be omitted.

The third embodiment will be explained with reference to FIGS. 5 and 6. The difference from the first and second embodiments is that, instead of introducing outside air into the drying air passage 9, part of the dry air from the dehumidification air passage 10 is introduced.

One side of the air passage 21 of the dehumidifying air passage 10 faces the side through which dry air flows, and the other side faces the first side of the drying air passage 9.
, an air passage 21 facing the side of the dehumidifying air passage 10 through which dry air flows, which is connected to the outside air introduction side 13 in the second embodiment and supplies a part of the dry air generated by the dehumidifier 4 of the dehumidifying air passage 10. The structure is such that the air is sucked in and introduced into the drying air passage.

This air passage 21 does not require any special blowing or suction equipment, and the drying air passage 9 becomes negative pressure due to the exhaust air from the exhaust device 5, so that the dry air in the dehumidifying air passage 10 is dried. The air is introduced into the air passage 9.

In this embodiment, since the dry air is heated by the heating device in the drying air passage 9, the dry air is further dried.
It is capable of rapidly absorbing a large amount of moisture from the moisture absorbing material 18 of the dehumidifying rotating body. Thereby, the economical efficiency of the heating device can be further improved. Also in this configuration, even if the heating device 4 is configured with an oil burner or the like, the air with the combustion odor from the burner can be directly discharged to the outside of the machine through the exhaust device, so it will not affect the grain. do not have.

By the way, when the air passage 21 is provided as in the third embodiment, an on-off valve (not shown) or the like is provided on the outside air introduction side 13 of the air passage 21, and depending on the humidity condition of the outside air, the outside air can be introduced to function. It is also possible to do so.

〔Effect of the invention〕

According to the present invention, with the above structure, even if an oil burner or the like is used in a dehumidifying dryer, there is no need to worry about the combustion odor of the oil burner or the soot from the oil burner adhering to the material to be dried. Since the heat generated by the humidifying device is used to dehumidify the dehumidifying rotating body and to heat the heat conductor, the thermal efficiency of the heating device is improved.

In other words, it has become possible to provide a dehumidifying device for a grain dryer that can greatly contribute to improving the quality of grain and improving the economic efficiency of the dryer.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of the first embodiment, Fig. 2 is a sectional view of Fig. 1 taken from section A-A, Fig. 3 is a side sectional view of the second embodiment, and Fig. 4. is a sectional view of Fig. 3 seen from section B-B, Fig. 5
The figure is a side sectional view of the third embodiment, and Figure 6 is a cross-sectional view of Figure 5.
FIG. In the figure, 1...Grain dryer, 2...Refining section, 3...Drying section, 4...Dehumidifier, 5...Exhaust device, 6...Transverse feed conveyor, 7... ...Elevator, 8...Drying channel, 9.
...Drying air passage, 10...Dehumidifying air passage, 11
... Screen, 12 ... Duct, 13 ... Outside air introduction part, 14 ... Warming device, 15 ... Rotating body for dehumidification, 16 ... Heat conductor, 17 ... Drive device , 18・
... Moisture absorbing material, 19... Fin, 20... Heat conductor, 21... Air passage.

Claims (3)

[Claims] (1) A dehumidifying device for a grain dryer that dehumidifies and dries the grain by introducing dry air obtained by dehumidifying outside air into a drying frame storing grain, and is equipped with a heating device such as a burner. A drying air passageway that introduces, warms, and discharges outside air, and a dehumidification air passageway that introduces dehumidified outside air into the drying frame, and in relation to the drying air passageway and the dehumidification air passageway, A dehumidifying rotating body that dehumidifies the outside air in the drying air passage and dehumidifies the outside air in the dehumidifying air passage, and a heat conductor that is heated in the drying air passage and warms the outside air in the dehumidification air passage. Dehumidification equipment for grain dryers. (2) A dehumidifying device for a grain dryer that dehumidifies and dries the grain by introducing dry air obtained by dehumidifying outside air into a drying frame in which grain is stored, the dehumidified outside air being introduced into the drying frame. A dehumidifying air passage is provided, and a drying air passage is provided with a heating device such as a burner to introduce, heat and discharge a portion of air from the dehumidifying air passage. a dehumidifying rotating body that dehumidifies the outside air in the drying air passage and dehumidifies the outside air in the dehumidifying air passage in relation to the drying air passage;
A dehumidifying plant for a dehumidifying dryer, characterized in that a heat conductor is provided which heats the air in the drying air passage and heats outside air in the dehumidifying air passage. (3) In the drying air passage, the hot air generated by a heating device such as a burner dehumidifies the dehumidifying rotor and then heats the heat conductor, and in the dehumidifying air passage, the dehumidifying rotor dehumidifies the outside air. The dehumidifying device for a dehumidifying dryer according to claim 1 or 2, wherein the dehumidified outside air is heated by a heat transfer body after the dehumidified outside air is heated.