JP2568913B2 - Grain far-infrared hot air dryer - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a grain drying apparatus for continuously flowing down and drying grains, and more particularly to a grain drying apparatus in which a far-infrared hot air drying apparatus as a drying heat source is improved. Related to the device.

(Conventional technology) A conventional grain drying device generally burns kerosene with a burner or the like, immediately mixes the combustion gas with the outside air to lower the temperature, and sends it to a flowing grain layer to dry the grain. I have to. Further, a device in which far infrared rays are used as a drying heat source is disclosed in, for example, JP-A-61-195265.

(Problems to be Solved by the Invention) As described above, if the combustion gas is immediately mixed with the outside air to be cooled to a low temperature and used for drying, the heat efficiency is poor and the energy loss is large. Further, in the case of using far-infrared rays as the drying heat source, a porous wall was required to form a drying passage, and the heat irradiation efficiency was poor. Further, in order for the grains to circulate and flow through the drying passage, the passage needs to have a predetermined width or more, and there is a problem in the uniformity of heat irradiation.

The present invention has been made to solve the above problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a grain drying apparatus in which a grain to be dried is caused to flow down and a heat source for drying by far-infrared hot air is provided in the falling grain layer. The heat source for drying by far-infrared hot air is connected to the burner 4 at one end, and the inner and outer cylinders are partially double and partially single
A far-infrared radiation 14 which emits electromagnetic waves containing a large amount of far-infrared rays when heated,
Is placed in the grain layer, and the hot air generated by the burner 4 heats the far-infrared radiator 14 to generate far-infrared rays, which is used as energy for drying the grain and heats the far-infrared radiator 14 The mixed gas of the exhaust gas and the outside air which emitted the electromagnetic wave and flowed into the grain layer from the vent provided in the cylindrical body 16 and flowed out from the vent of the exhaust path plate 17 to remove water evaporated from the grain. It is characterized by being removed.

(Operation) With the above configuration, for example, a burner 4 that burns kerosene
In this way, the far-infrared radiator 14 that emits electromagnetic waves containing far-infrared rays is directly heated to generate far-infrared rays, and the grains are directly dried by the far-infrared rays, and the exhaust gas and the outside air that heat the far-infrared radiators 14 The mixed gas flows into the grain layer from the vent provided in the cylinder 16 and flows out from the vent of the exhaust path plate 17 to remove moisture evaporated from the grain, so that the heat energy efficiency is further improved.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a circulation type grain dryer. The grain dryer 1 has a bucket elevator 3 erected outside a box-shaped casing 2, a burner 4, a heat distribution chamber 5, and an attraction. A fan 6, an inflow air adjusting unit 7, and the like are provided.

In the casing 2, a grain storage unit 8, a drying unit 9, and a grain collection unit 10 are provided in order from the top. At an upper portion of the grain storage unit 8, a grain distribution screw 11 that communicates with the upper end of the bucket elevator 3 to horizontally transport the grains and distribute the grains into the grain storage unit 8 is provided. Above grain collection section 10
A grain collecting and conveying screw 12 is provided at the bottom of the bucket elevator 3 and communicates with the lower end of the bucket elevator 3. Although not shown, the bucket elevator 3 is provided with a hopper for stuffing grain, stuffing grain into the grain storage unit 8 via the grain distribution screw 11, and collecting and collecting grain during the drying operation.
The cereal to be dried discharged by the transport screw 12 is sent to the cereal distribution screw 11 for circulation, and when the drying operation is completed, the cereal is switched to discharge the dried cereal from the middle of the bucket elevator 3 to the outside of the machine. It has become.

As shown in FIG. 2, the drying section 9 has one end communicating with the heat distribution chamber 5 and the other end communicating with the inflow air adjusting section 7, and has two triangular end faces. Hot air path
13,13 are provided. The hot air passage 13 includes an inner plate 15 partially provided with a far-infrared radiator (for example, a fine ceramic is applied to the inner plate 15), and an outer side of a double ventilation structure formed outside the inner plate 15. It consists of a plate 16.

As shown in FIG. 1, only the inner plate 15 communicates with the heat distribution chamber 5, and the end of the outer plate 16 on the heat distribution chamber 5 side is in contact with the inner surface of the casing 2. The two spaces formed by the inner plate 15 and the outer plate 16 are opened to communicate with the grain storage section 8 through a number of vents of the outer plate 16, and the grain is discharged from the side to the lower side by the exhaust passage plate 17. Downstream passages 18 are formed, and rotary valves 19, 19 are provided at the bottom of the grain distribution downstream passages 18,18. The ventilation fan 6 is communicated with an exhaust passage 20 formed below the exhaust passage plate 17. The grains discharged from the rotary valves 19, 19
The transfer screw 12 is provided.

In the cereal far-infrared hot air drying apparatus having such a configuration, the cereal to be dried is put into the cereal storage section 8 by the bucket elevator 3 via the cereal distribution screw 11 and the bucket elevator 3, the cereal distribution screw 11, and the burner.
4, by operating the attraction fan 6, the rotary valve 19, the grain collecting / transporting screw 12, etc., the cereal to be dried is circulated on the route of the grain storage section 8, the drying section 9, the grain collecting section 10, and the bucket elevator 3. And dry. The circulation speed is mainly determined by the rotation speed of the rotary valve 19.

The hot air generated by the combustion of the burner 4 is introduced from the heat distribution chamber 5 to the hot air passages 13, and the heat heats the far-infrared radiator 14 to generate an electromagnetic wave containing much far-infrared rays, thereby causing The grain flowing down the road 18 is dried. The electromagnetic wave containing a large amount of far-infrared rays is directly radiated below the far-infrared radiator 14 as shown in FIG. Exhaust heat that has reached the inflow air conditioning unit 7 after heating the far-infrared radiator 14 is mixed with the outside air here and is discharged from the outer plate 16 through a passage between the inner plate 15 and the outer plate 16. Dry the grain. The exhaust heat of the burner 4 is generated by the attraction of the attraction fan 6.
The grain is forced to pass through the grain flowing down the grain distribution lower path 18 to dry the grain, and moisture generated by the drying and fine dust generated by moving the grain are attracted to the attraction fan 6 through the exhaust path plate 17. And is discharged outside the machine. In addition, it is possible to freely perform so-called tempering during the drying operation.

When the drying operation is completed, the combustion of the burner 4 is stopped, the circulation path of the bucket elevator 3 is switched, and the dried grain is discharged outside the machine.

In addition, the far-infrared radiator 14 of the above embodiment may be provided not only at the bottom of the hot air passage 13 but at another position, and the type of the dryer is not limited to the above-described embodiment and may be another type. It may be.

(Effects of the Invention) As described above, according to the grain far-infrared hot-air drying device of the present invention, a drying heat source using far-infrared hot air is connected to the burner 4 at one end, and is partially double and partially single. A far-infrared radiator 14 that emits an electromagnetic wave containing a large amount of far-infrared rays when heated is installed in the grain layer, and is composed of inner and outer cylindrical bodies 15 and 16 having a structure. The generated hot air heats the far-infrared radiator 14 to generate far-infrared rays, which is used as energy for drying the grain, so that the far-infrared radiating portion is buried in the grain,
Electromagnetic waves containing a large amount of far-infrared rays can be uniformly and directly applied to the grains flowing around the far-infrared radiator 14, thereby eliminating heat loss of far-infrared rays and performing efficient grain drying.

Further, the mixed gas of the exhaust gas and the outside air, which emitted the electromagnetic wave by heating the far-infrared radiator 14, flows into the grain layer from the vent provided in the cylindrical body 16 and passes through the vent of the exhaust path plate 17 through the vent. Since the water that has flowed out and evaporated from the grain is removed, electromagnetic waves containing a large amount of far-infrared rays emitted from the far-infrared radiator 14 uniformly irradiate the grain while forming a repose angle at the lower part, and the far-infrared radiator 14 The heated waste heat can be used to remove water evaporated from the grain, thereby reducing uneven drying and eliminating the occurrence of body cracks. Further, the thermal energy generated from the far-infrared radiator 14 can be utilized without waste at all, and is economical.

[Brief description of the drawings]

FIG. 1 is a perspective view of a grain dryer showing one embodiment of the present invention,
FIG. 2 is a front view of a main part. DESCRIPTION OF SYMBOLS 1 ... Grain dryer, 2 ... Casing, 3 ... Bucket elevator, 4 ... Burner, 5 ... Heat distribution chamber, 6 ... Induction fan, 7 ... Inflow air adjustment unit, 8 ... Grain storage unit ,
9 ... Drying unit, 10 ... Grain collection unit, 11 ... Grain distribution screw, 12 ... Grain collection / transport screw, 13 ... Hot air passage 14 ...
Far-infrared radiator, 15… Inner plate, 16… Outer plate, 17… Exhaust channel plate, 18… Grain logistics lower channel, 19…
… Rotary valve, 20 …… Exhaust air path.

Claims (1)

(57) [Claims] 1. A grain drying apparatus in which a grain to be dried is caused to flow down and a heat source for drying by far-infrared hot air is provided in the falling grain layer, wherein the heat source for drying by far-infrared hot air has a burner (4) at one end. A single-structured cylindrical body (15, 16), which is connected and partially double and partly of a single-structured inner and outer cylindrical body (15, 16)
Then, a far-infrared radiator (14), which emits electromagnetic waves containing a lot of far-infrared rays when heated, is installed in the grain layer, and the far-infrared radiator (14) is heated by the hot air generated by the burner (4). To generate far-infrared light and use it as energy for drying the grain. The mixed gas of the exhaust gas and the outside air, which heats the far-infrared radiator (14) and emits electromagnetic waves, is transferred to the cylinder (16). A cereal far-infrared hot air drying apparatus characterized by removing water that has flowed into the grain layer from the provided vent and through the vent of the exhaust path plate (17) and evaporated from the grain.