JP3651019B2 - Far infrared dryer - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a far-infrared dryer and can be used for a grain dryer or the like.
[0002]
[Prior art and problems to be solved by the invention]
Conventional grain drying is mainly performed with a kerosene burner, but is considered to be a drying method close to natural heat drying, and a drying method that emits far-infrared rays has been proposed as a convenience for maintaining grain quality (for example, Japanese Patent Laid-Open No. Hei 2). -208489).
[0003]
However, in the above embodiment, since an electric heater is used for dissipating far-infrared rays, there is a disadvantage that the energy cost is increased and is not practical.
[0004]
[Means for Solving the Problems]
The present invention is intended to eliminate the above-mentioned drawbacks. In the hot air chamber (5) adjacent to the grain flow passage (8) formed to flow down the grain, the heat pipe (11) is connected to the far infrared radiator. In a grain dryer in which a far-infrared radiator (12) configured to weld materials is installed in the front-rear direction, the far-infrared radiator (12) heats an end of the heat pipe (11) by a burner (10). Then, it is set as the structure which radiates | emits a far-infrared ray, and it is set as the far-infrared dryer characterized by having provided the reflecting plate (42) above this far-infrared radiator (12).
[0005]
[Effects of the invention]
When one end of the heat pipe (11) is heated, the temperature becomes uniform due to the convection of the gas and liquid in the heat pipe (11), and the heat is dissipated without far from the far-infrared radiator (12) welded thereto. Therefore, even when the hot air chamber is formed long in the front-rear direction, far-infrared radiation is uniformly dissipated and drying unevenness is less likely to occur, but the reflector (12) above the far-infrared radiator (12) in the hot air chamber (5) 42) improves the efficiency of drying with far-infrared rays because the upward radiation is limited and reflected downward.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a machine frame of a grain drying device, in which a storage tank 2, a drying room 3, and a grain collection room 4 are stacked in this order. In the drying chamber 3, a pair of left and right hot air chambers 5 and 5 having a rhombus cross section are provided, the upper half is formed of a C-shaped sheet metal member 6 and 6, and the lower half is formed of a breathable plate member 7 and 7. Is done. Among these, the air-permeable board materials 9 and 9 are fixed around the grain flow passages 8 and 8 in parallel with the air-permeable board materials 7 and 7 in the lower half.
[0007]
In the hot air chambers 5 and 5, horizontal portions extending from the middle portion to the other end portion of the heat pipes 11 and 11 where the vertical portion at the lower end side is heated by burner 10 combustion described later are arranged in three upper and lower stages. These heat pipes 11 and 11 constitute a far-infrared radiator 12 by plasma spraying an alumina / titanium-based far-infrared radiator material on the surface side thereof. Radiant heat from the radiator configured in this manner is radiated and absorbed by the grain in the grain flow passages 8 and 8. The water vaporized by the absorbed heat energy is exhausted by the suction fan 14 connected to the rear side of the exhaust chambers 13, 13, 13.
[0008]
Further, in AtsumariKoku chamber 4, respectively feeding valve 15, 15 provided on the collection bottom of the V-type formed above cereal rundown path 8, 8, funnel-shaped and feeding grain predetermined amount from these feeding valve It is the structure which can be transferred to the elevator 18 of the stand-up installation by the lower transfer spiral 17 which is gathered in the cereal basket 16 to be formed in the bottom and laid in the lower part thereof.
[0009]
A throwing cylinder 19 is connected to the upper side of the elevator 18, and grain can be supplied to the start end side of the upper transfer spiral 20 樋 21 laid horizontally on the ceiling of the storage tank 2. Reference numeral 22 denotes a diffusion plate that receives the grain transferred by the transfer spiral basket 21 at the center upper position of the storage tank 2 and diffuses it while rotating around the vertical axis 23.
[0010]
The diffusion plate 21 has a rectangular shape in plan view, and has a structure in which standing walls are formed so as to have appropriate grain discharge space at the four corners, and the grain is discharged from the space in the rotational tangential direction. In addition, the vertical axis 23 is provided so as to be able to interlock with the spiral 20 axis through a interlocking mechanism such as a bevel gear at a predetermined rotational speed.
[0011]
Regarding the installation structure of the burner 10, the burner 10 employs a rotary vaporization type kerosene burner incorporating a vaporizing cylinder, a combustion primary air blower fan, etc. It is accommodated in the triangular space formed in. The flame is installed to face the front of the machine frame. A hot air passage port 4b is opened on the cereal collecting machine wall 4a on the front side of the burner 10, a lower wind tunnel 24 is opened on the front surface thereof, and a drying chamber machine wall mouth portion opened on the hot air chambers 5 and 5 at the upper part thereof. Upper wind tunnels 25 are detachably provided on the front surfaces of 3a and 3b. Slit holes 26 and 26 for introducing outside air and a reflector 27 made of stainless steel are fixed to the lower wind tunnel 23. The heat pipes 11 and 11 are provided on the left and right sides, respectively, so as to be substantially vertical between the lower wind tunnel 24 and the upper wind tunnel 25 and bend at a right angle to extend the horizontal portion to the left and right hot air chambers 5 and 5. . The combustion flame of the burner 10 is ejected forward by the rotation of the suction fan 14 , but the end portions of the heat pipes 11, 11 are heated. A heat receiving fin 28 is disposed at the end of the heat pipe 11.
[0012]
In addition, with the burner 10 combustion, the remainder used for heating the end portions of the heat pipes 11 and 11 becomes a drying wind and passes through the lower wind tunnel 24 and the upper wind tunnel 25 to reach the hot air chambers 5 and 5. is there. A dryer controller 43 is fixed to the outer surface of the upper wind tunnel 25, and a cover 29 is provided so as to cover the front surface of the wind tunnel 25.
[0013]
Reference numeral 42 denotes a reflector provided on the upper surface of the heat pipes 11 and 11 at an appropriate interval. Operation control of the grain circulation mechanism or the like is performed by the controller 43 provided with a memory for storing a control program necessary for drying control, various data, and the like. This is performed by the control unit 30.
[0014]
That is, under the necessary comparison operation in response to the setting information from the various setting switches 31 to 34 provided on the operation panel of the controller 26 and the detection information from the sensors provided in each part of the dryer machine frame 1, It controls the heat radiation temperature of the far-infrared radiator 12, that is, the burner 10 combustion amount, the grain feed amount control, and the like.
[0015]
The arithmetic control unit 30 mainly has the following functions. (1) Upon receiving a drying start command signal from the drying switch 32, a starting signal is output to each part of the operation, for example, a grain circulation motor such as an elevator motor 37 and a feeding valve motor 38, and a starting signal is output to the suction fan motor 39. To do. (2) Next, the burner 10 ignition igniter (not shown) ON signal and the fuel valve 40 open signal are output. (3) A detection signal from the hot air temperature sensor 41 disposed at a predetermined position of the hot air chamber 5 is input, and the burner 10 combustion amount is increased or decreased to coincide with a preset drying temperature. (4) In response to the detection signal of the set finishing moisture, a signal is output to stop the operation parts such as the grain circulation motor and the combustion system. Etc.
[0016]
The operation of the above example will be described. The grain put into the laterally extending hopper outside the figure is lifted through the lower transfer spiral 17 and the elevator 18 which are driven by turning on the tension switch 31, and then passed through the upper transfer spiral ridge 21 to the center of the ceiling. When it is supplied to the surface of the diffusion plate 22 that rotates about the vertical axis 23, it falls while drawing a predetermined diffusion locus and is stuck to the storage tank 2.
When the tensioning is completed, the process shifts to the drying operation. In the preceding stage, the grain type setting, the desired drying finish moisture value, and the drying temperature are set. When the above processing is performed and the drying switch 32 is turned ON, the elevator 18, the vertical transfer spiral, the feeding valve, etc. start operation, and the suction fan 14 also starts operation. At the same time, the ignition igniter, the fuel valve, etc. of the burner 10 are turned on or opened, and the burner 10 is also driven.
[0017]
Here, the burner 10 flame heats the ends of the heat pipes 11, 11, heats the far-infrared radiator 12 welded to the heat pipes 11 in the hot air chambers 5, 5, and emits far-infrared rays from the radiator 12. Is emitted. The radiant heat is appropriately dried by the suction action of the suction fan 14 along with the introduced outside air through the grain flow passages 8 and 8 to the wind exhaust chamber 13 to dry the grain. At this time, the reflecting plate 42 restricts the radiation of far infrared rays upward and reflects it downward to promote drying of the grains flowing down the grain flow passages 8 and 8. In addition, a part of the combustion flame of the burner 10 is introduced into the hot air chamber 5 as hot air with the introduced outside air, and the radiant heat by the far infrared rays can be assisted. The burner 10 is ON / OFF controlled or the combustion amount of the burner 10 is changed to a large or small so that the combined hot air temperature of the far-infrared radiant heat and the auxiliary hot air becomes a preset temperature.
[0018]
Grains soaked with hot air by the burner 10 in the drying chamber 3 are returned to the storage tank 2 again through the lower transfer spiral 17, the elevator 18, and the upper transfer spiral basket 21 of the grain collection chamber 4, and are subjected to a tempering action. Such a process is repeated, and when the predetermined moisture value is reached, the drying is completed.
[0019]
When a long far-infrared radiator 12 is directly heated by a burner, in the longitudinal direction, the radiation temperature on the burner heating side becomes higher and lower as the radiation temperature increases. If the welding form is adopted, such a variation in temperature is reduced, and as a result, uneven drying is reduced.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a main part.
FIG. 2 is a front sectional view of a grain dryer.
FIG. 3 is a side sectional view of a grain dryer.
FIG. 4 is a control block diagram.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Grain drying machine frame, 2 ... Storage tank, 3 ... Drying room, 4 ... Grain collection room, 5, 5 ... Hot air room, 6, 6 ... Sheet metal material, 7, 7 ... Breathable board material, 8, 8 ... Grain flow path, 9, 9 ... Breathable plate material, 10 ... Burner, 11a, 11b, 11c ... Heat pipe, 12 ... Far infrared radiator , 13 ... Air exhaust chamber, 14 ... Suction fan, 15, 15 ... Feed valve, 16 ... cereal collecting bowl, 17 ... lower transfer spiral, 18 ... elevator, 19 ... throwing cylinder, 20 ... upper transfer spiral, 21 ... straw, 22 ... diffuser, 24 ... lower wind tunnel, 25 ... upper wind tunnel, 28 ... heat receiving fins, 29 ... cover, 30 ... arithmetic control unit, 31-34 ... various setting switches, 37 ... elevator motor, 38 ... feeding valve motor, 39 ... suction fan motor, 40 ... fuel valve, 41 ... hot air temperature Sensor, 42 ... reflector, 43 ... controller

Claims (1)

A far-infrared radiator (12) configured to weld a far-infrared radiator material to a heat pipe (11) in a hot air chamber (5) adjacent to a grain flow passage (8) formed to flow the grain. in the longitudinal direction and laterally disposed cereal dryer, the far-infrared radiator (12) is configured to emit heat then far infrared ends of the heat pipe (11) by a burner (10), the far-infrared radiation A far-infrared dryer, characterized in that a reflector (42) is provided above the body (12).

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