JPS62172178A - Method of drying cereal grain by using circulation type cereal drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] A: The invention is IfiIi: Grain drying method 1 in which grains are dried by exposing them to hot air while circulating them using a type I grain dryer.
To improve the problem [VJ t le.

The fl ring-type grain dryer A usually has a box-shaped machine body a with a grain tank L installed on the upper side to hold the grains to be dried, as shown in FIG. 1. At the bottom of the aircraft a,
It is equipped with a rotary shutter 2 for controlling the discharge 1it to discharge grains from the discharge port at the bottom of the grain tank 1, and a lower conveyor 3 for discharging the grains discharged by the rotary shutter 2 to the outside of the machine a. An elevator 4 (1) is installed on the outer side of the machine body a to lift the grains delivered by the lower conveyor 3 (1).
A conveyor 5 is installed in the upper part of the machine a to feed the grains lifted by the elevator 4 into the upper part of the grain tank. ni',
In the middle part of the grain tank 1, in the part occupying the bottom of grain tank 1,
- An air guide path 6 that sends drying air (hot air) across the bottom of the grain tank 1; A hot air generation device that generates the drying air by installing an air exhaust path (not clearly shown in the drawing) and an air exhaust duct 7 that communicates with the air exhaust path outside, and generating the drying air at the inlet L of the air guide path 6. A device (burner device) 8 is disposed therein, and a blower 9 is disposed in the exhaust duct 7.

When drying grains using this circulation type grain dryer A, first, with the operation of the hot air generator 8 and the rotary shutter 2 stopped, From there, the grains are fed to the lower conveyor 3, or from the loading port provided at the bottom of the elevator 4.
A predetermined amount of grain is loaded into the grain tank l by the operation of the lower conveyor 3, the elevator 4, the upper conveyor 5, etc., and from that state, the rotary shutter 2, the lower conveyor 3, the elevator 4, the upper conveyor 5, etc. Operate the grain feeding device to feed the grain tank
While circulating the grains inside, the hot air generating device 8 and the blower 9 are operated to blow hot air (drying air) onto the circulating and flowing grains, and the circulating grain dryer A is in operation Φ. The drying process is carried out by continuing the drying process for a predetermined period of time.The method of drying the grains using the circulating grain dryer A has a method of drying the grains over time during the drying process. As drying progresses, the drying efficiency decreases, and in order to avoid deterioration of the grain, it is not possible to increase the temperature of the air that is applied to the circulating grain, so it is usually dried for around 12 hours. The problem is that efficiency cannot be improved because the process takes a relatively long time.

The present invention was made to solve this problem, and an object of the present invention is to provide a new drying method that can perform efficient drying using a circulating grain dryer.

Therefore, the present invention has been made based on the knowledge obtained through various studies and experiments in order to achieve the above-mentioned object. That is, in the drying method described above, the drying efficiency gradually decreases as the grains dry as the drying process progresses because the surface moisture of the grains that cannot be evaporated decreases as the drying progresses. As a result, during one cycle of circulation of grains in the grain tank, the efficiency of moisture removal due to exposure to the hot air decreases in the drying area where the hot air blows through, and the drying process also increases. This is due to the increase in ventilation resistance due to the denser accumulation of grains as the drying process progresses. , ``@If the number of rings increases.

Moisture removal efficiency of time dust improves, and at the same time, grain piles in the part where the hot air blows through, which becomes the drying part, become sparse due to an increase in circulation speed, reducing ventilation resistance and drying. This was done based on the knowledge that drying efficiency can be improved and drying efficiency can be increased.

For this reason, in the present invention, in the method of drying grains by using a circulation type 10 grain dryer and drying the grains by blowing 8 winds while circulating the grains, the speed at which the grains are circulated during the drying process is adjusted to The present invention proposes a method for drying grain using a circulating grain dryer, which is characterized in that the amount of grain is increased as the drying progresses.

This embodiment will be described in detail with reference to the drawings. Note that the same reference numerals as in the previous means are used for constituent members having the same effect.

:ftJ2 In the diagram, a is the fuselage, l is the grain tank installed in the fuselage a, and 2 is the drying part formed at the bottom of the grain tank l (
3 is a lower conveyor installed below the rotating shutter 2; 4 is an elevator installed on the outer surface of the machine body a; 5 is an elevator installed on the outside of the machine body a; An upper conveyor, 5a is an equalizer that rotates by being transmitted to the rotating shaft of the upper conveyor 5, 6 is an air guide path for hot air, 7 is an air exhaust duct leading to the air exhaust path, and 8 is provided at the entrance of the air guide path 6. 9 is a blower installed in the exhaust duct 7, 10 is a dust remover, P is a fuel supply pump of the hot air generator 8, and W is +i? i
Note: From grain tank 1 to rotary shunter 2 - door section conveyor 3 -> lifting m4 - 1 section conveyor 5 -> 11 of grain tank 1 Sampling the grains from the circulation system path of circulating grains and detecting the moisture value Moisture value detection device 1Ml is a motor that drives the above-mentioned blower 9, M2 is a motor that drives the lower conveyor 3, M3 is a motor that drives the lower conveyor 3, the conveyor 4b and the upper conveyor in the grain lifting tower 4a of the elevator 4. 5 and the motor that drives the equalizer 5a, M4 is the motor that drives the rotary shutter 2, M5 is the motor that drives the moisture value detection device W mentioned above, and M6 is the discharge tube part of the upper part of the grain lifting tower 4a of the elevator 4. A motor that operates a switching shutter 4d that alternately connects the takeout gutter 4c installed in the 11 and the upper conveyor described in 11 to the discharge cylinder section, M7 is a motor that drives the dust removal filo, and M8 is a hot air generation motor. The motor that drives the burner fan of the device 8, M9 is the motor that drives the fuel supply pump P of the hot air generation device 48, and these motors are installed in the control box b installed at an appropriate location on the outside of the machine a. Controlled by a control circuit.

In addition, SL is an outside temperature sensor consisting of a thermistor or the like installed on the outer surface of the aircraft body a to detect the outside temperature, and S2 is an outside temperature sensor that detects the temperature of the hot air generated by the hot air generation device 8 and sent to the air guide path 6. S3 is a grain temperature sensor consisting of a thermistor etc. arranged in the storage IV 1 of the grain +1111 to detect the temperature of the grains in the grain tank 1. , S4 is an exhaust air temperature sensor consisting of a thermistor or the like installed in the exhaust duct 7 (or the exhaust passage) to detect the temperature of the exhaust air of hot air that has blown through the drying part of the grain tank 1;
S5 is a grain star sensor consisting of a level switch etc. installed on the inner wall surface of grain 1 (Ill) to detect pickling of grains placed in grain tank 1, and S6 is a moisture value detection device W sampling. A moisture detection sensor consisting of a roll electrode, etc. installed in the moisture value detection device W to detect the moisture G+i of grains is shown, and these are connected to the control circuit in the roll box b mentioned above. .

Figure 3 is a front view of the control box b described in 1i'i, where Di is the dial for setting the grain temperature, and D2 is the dial for setting the grain temperature. D3 indicates a product type setting dial that is switched so that drying can be carried out under conditions suitable for grains, and D3 indicates a product L moisture setting dial that sets the final moisture value.

The following figure shows a block diagram of a control circuit provided in the control box b.

In the figure, S6 is the moisture detection sensor of the moisture detection device W, K1 is a grain moisture detection circuit that converts the signal sent from the moisture detection sensor S6 into a signal of grain moisture (Tfi (water content *)), 2 is a circulation amount 1 role calculation circuit incorporating a computer that calculates grain circulation jIY according to a predetermined pattern from the signal of grain moisture 6ti sent out from the grain moisture detection circuit Kl;
K3 is a circulation system motor speed control circuit that controls the rotational speed of the motor of the grain W ring system according to the setting signal sent to the above-mentioned light state setting calculation circuit, and Mn is the motor M2 that drives the lower conveyor 3 mentioned above. and elevator 4.
The figure shows motors in a first-cycle system, including a motor M3 that drives the upper conveyor 5 and the equalizer 5a, and a motor M4 that drives the single-rotation shutter 2.

Due to these, the moisture value detection device W can be used during drying work.
According to the grain moisture value detected by the moisture detection sensor S6 and the grain moisture detection circuit 1.

The circulation 111 setting calculation circuit performs calculations according to a predetermined pattern in step 2 to control the rotational speed of the motor Mn in the circulation system to be changed, but the calculation contents performed in step 2 in the circulation j4 setting calculation circuit described above are as follows. As shown in Figure 5, the moisture content of grains (%)
) Optimal circulation when M 11. A pattern was created by finding the circulation speed that corresponds to SV through experiments, and the pattern was followed so that as the water content (%) decreased, the circulation amount increased: ', I1 gradually increased. It is.

In addition, the circulation system motor Mn controlled by the circulation system motor speed control circuit 3 controls the grain 14 circulating in the circulation system to be piled up from the exhaust port at the bottom of the grain tank 1 by the rotation of the rotary shank 2. Since the discharge state corresponds to the discharge f4 and is approximately proportional to the rotational speed of the rotary shunter 2, only the motor M2 for driving the rotary shank 2 may be used.

As explained above, the method of drying grains using a circulating JQ4 grain dryer according to the present invention is to dry grains by blowing hot air while circulating 19 grains using a circulating JQ4 grain dryer. In this drying method, the speed at which the grains are circulated during the drying process is increased as the grains dry, which increases the number of circulations and improves the water removal efficiency per hour. At the same time, as drying progresses, the grain piles become denser, increasing ventilation resistance.As the circulation speed increases, the grain piles become looser in the drying area where the drying wind blows through. This effectively prevents drying and increases the amount of air passing through the drying section, thereby improving drying efficiency.

4.1 A simple explanation of the process IJI Figure 1 is an explanatory diagram of a circulating grain dryer, Figure 2 is a longitudinal cross-sectional side view of a circulating grain dryer used to implement the uninvented invention, and Figure 3 is a control of the same as above. Honks' 11:.

Top view 1 Figure 4 is a block circuit diagram 1 of the same control device as above.
The figure is an introductory diagram of a pattern in which Ml is input to the circulation t118 setting calculation circuit.

Figure ii'ij Fuso Theory 1 S1 A... Circulating grain dryer a... Machine b...
・Control box 1...Grain tank 2...Rotating shutter 3...Lower conohair 4...Elevator 4a...Grain lifting tower 4b...Pakento conveyor 4C...Take-out gutter 4d...・Switchable shutter
5... Upper conveyor 5a... Equalizer
6...Air guide path 7...υ[Wind duct 8...
・Hot air generator 9...Blower 10...
・Dust remover P...Fuel fuel 1 supply pump W...Moisture value detection device Ml-M2・M3・M4・M5 fist M6 reference M7・
M8・M9...Motor Mn...Circulation system motor Dl-02-D3-...Dial Sl...Outside temperature sensor S2...Hot air temperature sensor S3
...Grain temperature sensor S4...Exhaust air temperature sensor S5...
・Grain jIY sensor S6...Moisture detection sensor 1・
... Grain moisture detection circuit 2 ... Circulation LM jlf setting calculation circuit 3 ... Circulation system motor speed control circuit Sv ... Circulation amount patent applicant Shiraki Seisakusho Co., Ltd. 11:
4＼ First proverb M Figure 2

Claims (1)

[Claims] A grain drying method in which the grains are dried by blowing hot air while circulating them using a circulating grain dryer, characterized in that the speed at which the grains are circulated during the drying process is increased as the grains dry. A method of drying grain using a circulating grain dryer.