JPH03102186A - Dry control system for cereals drier - Google Patents

Abstract

PURPOSE:To set time up to dry finish of cereals to substantially the same as set finishing time and to perform rice hulling, etc., of a postworking as planned by so controlling dehumidifying air generated from a dehumidifier as to contain calculated drying moisture weight, and drying the cereals. CONSTITUTION:Stock cereal weight charged in a drier 4 is detected by a weight sensor 3 during drying. Dehumidified weight to be dehumidified up to finish of cereals is calculated from the detected stock cereal weight, initial moisture of the cereals to be detected by a moisture sensor 24 and target finish moisture set by the operation of a moisture set knob. Drying moisture weight per unit time is calculated from the calculated dehumidifying weight and drying time set by the operation of a timer setting knob 39. Temperature and moisture of dehumidifying air generated from the dehumidifier 2 are so set to predetermined temperature and moisture as to become the calculated drying moisture weight, so controlled as to become the set dehumidifying air to dry the cereals. Accordingly, a planned operation can be performed.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a drying control method for a grain dryer.

Conventional technology Conventionally, grains are fed into a drying chamber and allowed to flow down, while dehumidifying air generated from a dehumidifier is passed through the drying chamber to dry the grains.The temperature and humidity of this dehumidifying air are set and memorized. It was a drying control method that used this set dehumidifying air to dry the product.

Problem to be Solved by the Invention While the grain is repeatedly circulated in the drying chamber of the grain dryer and flowing down, the dehumidifying air generated from the dehumidifier crosses and passes through this drying chamber, causing the grain to flow down in the drying chamber. The grains inside are exposed to this dehumidified air and dried.

During this drying operation, the temperature and humidity of the dehumidified air generated from the dehumidifying device are set and memorized, and the grains are dried by this dehumidified air, but the grains are If the moisture content is particularly high, there may be variations in the time it takes to finish drying, which can interfere with the subsequent hulling work, so it is important to finish drying within the specified time. That is.

Means for Solving the Problems This invention provides a grain dryer P in which grains are fed into a drying chamber 1 and dried by passing dehumidified air through a dehumidifying device 2 while letting the grains flow down.
I. At step i, the water removed weight to be removed until the grain is finished is calculated from the loaded grain weight detected by the weight sensor 3, the initial moisture of the grain, and the finishing target moisture, and is set as this water removed weight. A drying control method characterized in that the dry moisture weight per unit time is calculated from the drying time until finishing, and the dehumidifying air is controlled and dried based on the calculated dry moisture weight per unit time. composition.

Effect of the Invention While the grain is repeatedly circulated in the drying chamber 1 of the grain dryer and flowing down, the dehumidified air generated from the dehumidifier 2 whose temperature is several degrees higher than the outside air temperature crosses and passes through the drying chamber 1. As a result, the grains flowing down the drying chamber 1 are exposed to this dehumidified air and dried. During this drying, the weight of the loaded grains loaded into the grain dryer is detected by the weight sensor 3, and the detected initial moisture content of the grains is set as the detected weight of loaded grains. The water removal weight to be removed until the grain is finished is calculated from the finishing target moisture content, and the dry water weight per unit time is calculated from this calculated water removal weight and the set drying time to finish. , the temperature and humidity of the dehumidifying air generated from the dehumidifier 2 are set to predetermined temperatures and humidity so that the calculated dry moisture weight is achieved,
The grains are dried under the control of this set dehumidifying air.

Effects of the Invention According to this invention, the water removal i that is removed before the grain is finished is
The dry moisture weight per unit time is calculated from t and the set time until drying finish, and the dehumidifying air generated from the dehumidifier 2 is controlled to dry the grains so that the calculated dry moisture weight is achieved. As a result, the time it takes to finish drying the grains is almost the same as the set finishing time, and this makes it possible to carry out post-hulling work in a planned manner. Efficiency is greatly improved and at the same time stable grain drying can be achieved.

Embodiment In the illustrated example, the machine wall 5 of the grain dryer 4 has a rectangular shape that is long in the front and back direction and is made up of front and rear wall plates and left and right wall plates. The dryer 4 is provided with an operating device 6 for starting and stopping the dryer 4, and the rear wall plate is provided with an exhaust fan 7, an exhaust fan motor 8 for rotationally driving the exhaust fan 7, and a valve motor 9. At the bottom of the four corners of the dryer wall 5, weight sensors 3 are provided to detect the weight of grains loaded into the dryer 4.

In the center of the lower part of the machine wall 5, there is provided a grain collection gutter 10 which is equipped with a transfer spiral in the front and back direction, and above the grain collection gutter 10, a drying chamber L formed between ventilation mesh plates is arranged in parallel. At the bottom of each drying chamber 1, a feed-out valve 11 for feeding and flowing grains was pivotally supported, and a blowing chamber 12 was formed between the inner sides of each drying chamber 1 and communicated with the dehumidifying device 2. In addition, a temperature sensor 26 and a humidity sensor 54 for detecting the temperature inside the ventilation chamber 12 are provided in the ventilation chamber 12, and a ventilation chamber 13 is formed outside each drying chamber 1. The valve motor 9 is connected to the speed change mechanism 4.
The structure is such that each delivery valve l1 is rotationally driven through.

A storage chamber 15 is formed on the upper side of each drying chamber 1 and transported,
A ceiling plate 16 and a transfer gutter l7 equipped with a transfer spiral are provided above the storage chamber 15, and this transfer 8! A supply port for supplying the transferred grains into the storage chamber 15 is provided in the center of 17, and a diffusion plate 18 is provided below the supply port to uniformly diffuse and return the grains into the storage chamber 15. The configuration is as follows.

The grain elevating machine 19 is provided in front of the front wall plate, and inside thereof a packet conveyor 20 belt is stretched between the upper and lower boars, and between the upper end and the starting end of the transfer gutter 17 is a dispensing cylinder 21. A supply gutter 22 is provided between the lower end and the terminal end of the grain collecting gutter 10 for communication.
9, the packet conveyor 20 is connected to the upper part by a grain hoist motor 23.
The belt, the transfer spiral in the transfer gutter 17, the spreading plate l8, and the transfer spiral in the grain collection gutter 10 are rotationally driven via the packet conveyor 20 belt, and the belt is rotated at approximately the center in the vertical direction. The provided moisture sensor 24 receives grains that fall while being conveyed to the upper part of the packet conveyor 20, crushes the grains under pressure, and simultaneously detects the moisture content of the crushed grains. Each part is configured to be rotated by an internal moisture motor 25 which is rotated by the transmission of an electrical determination signal from the operating device 6.

The dehumidifier 2 has a box shape, and the front wall plate of the box body is provided with an inlet 27 for sucking outside air, and the rear wall plate is provided with an inlet 27 for inhaling outside air. An air outlet 28 is provided through which the converted dehumidified air is blown, and the air outlet 28 and the air chamber 12 are configured to communicate with each other. In order to convert, the compressor 29 circulates and converts the low-temperature low-pressure gas that is the refrigerant into high-temperature high-pressure gas, high-temperature high-pressure liquid, and low-temperature low-pressure liquid, and this compression e! 29, a compressor motor 30, a condenser 31, an expansion valve 32, and an evaporator 33 are provided,
Furthermore, a heater 34 is provided for further heating the dehumidified air which has been converted into dehumidified air by the demixing device 2.

The operating device 6 is box-shaped, and has a start switch 35 on the surface plate of the box that connects the dryer 4 and the dehumidifying device 2, and a start switch 35 for starting and stopping the drying and discharging operations. Switch 36, Moisture setting switch 38 for setting the grain finishing target moisture depending on the operating position, Timer setting switch 39 for setting the drying time, Alternate display of detected grain moisture, detected dehumidifying air temperature, remaining drying time, etc. The configuration includes a display window 40 and a monitor display, etc., and an outside temperature sensor 41 for detecting outside air temperature is installed on the outside of the bottom plate, and a drying control device 42, a temperature control bag holder 43, and a timer are installed inside. 44 and a clock 45.
Reference numerals 8 and 39 are of a rotary switch type, and a predetermined numerical value is set depending on the operating position.

The drying control device 42 converts the detected values detected by each of the weight sensors 3 and the moisture sensor 24 into A-D converters.
A converter 46, an input circuit 47 into which the converted value converted by the A-D converter 46 is input, the operation of each switch 35, 36 and the moisture setting switch 38, and the time of the clock 45 are input. An input circuit 48, a CPU 49 that performs arithmetic and logical operations and comparison operations on various human input values input from these input circuits 47 and 48, and an output circuit 50 that receives and outputs various commands from the CPU 49 are provided. It has a three-dimensional configuration.

The temperature control device 43 includes an A-D converter 51 that converts detected values detected by the temperature sensor 26, the humidity sensor 54, and the outside air temperature sensor 41 from analog to digital; an input circuit 52 into which the converted value is input;
an input circuit 53 through which the timer setting controller 39 is manually operated, and the CPU which performs arithmetic and logical operations, comparison operations, etc. on various input values input from these input circuits 52 and 53;
49, the configuration includes an output circuit 50 that receives various commands from the CPU 49 and outputs them.

The drying control by the drying control device 42 is performed as follows. When the moisture setting knob 38 is operated, this operating position is input to the CPU 49, and the finishing target moisture of the grain is set by this input. The grain moisture detected by the moisture sensor 24 is input to the CPU 49, the input detected grain moisture is compared with the set finishing target moisture, and when the detected grain moisture becomes the same as the finishing target moisture,
This drying control device 42 is configured to automatically control and automatically stop the dryer 4.

For example, when the loaded grain weight (W) detected by each of the weight sensors 3 is detected as 3000 Kg, the CPU
49, the initial grain moisture CMSII detected by the moisture sensor 24 is detected as 20%, and the CPU 49
, the initial water content fi [
If WM1) is 600Kg, this is the configuration calculated by this CPU49, and 3000 (W) X0.2 (MSI) = 600K
g (WMI) The water content weight (WM2) at the time of finishing is calculated as follows, and the correction coefficient (S) is set and stored in the CPU 49. This correction coefficient (S) is 0 of the dust weight correction.
．． 9, and by operating the moisture setting switch 38, the CPU
If the finishing target moisture content (MS) input to 49 is 14%, the moisture content weight at finishing (WM2) is 3 using the following calculation formula.
7 8 Kg is the configuration calculated by this CPU 49, [3000 (W) X0.9 (Sl) XO.l4 (MS
) = 378Kg (WM21 From these initial water content weight (WMI) and finished water content weight (WM2), the following calculation formula shows that if the water removal weight (WN) from the start of drying to finishing is 2 2 2 Kg, the CP
The configuration is calculated by U49, 60G (WMI) - 378 (WM2) = 2
22Kg (WN) Also, the outside air temperature detected by the outside air temperature sensor 4l is input to the CPU 49, this input value is compared with the outside air temperature of 5°C that has been set and stored in this CPU 49, and the detected outside air temperature is determined as the set outside air temperature. When a temperature of 5° C. or lower is detected, the dryer 4 is automatically stopped under automatic control by the drying control device 42 to stop drying the grains, and during this stop, the outside air temperature sensor 41 is When an outside air temperature of 0.degree. PMI where the outside air temperature that is set and memorized decreases: 0
When it becomes 0, this PMII:00 is input to this CPU 49, and this input causes the dryer 4 to switch to the drying control device 4.
2, the drying of the grains is stopped automatically, and when the clock 45 reaches 8:00 AM when the outside temperature rises, this 8:00 AM is input to the CPU 49, and this input causes the drying machine 4 to is a configuration in which grain drying is restarted under restart control.

Temperature control by the temperature control device 43 is performed as follows. For example, the water removal weight (WN) 2 2 2 Kg input to the cPU 49 and the drying weight set by operating the timer control 39 are controlled by the temperature control device 43 as follows. In this configuration, 40 hours of time (T) are manually input to this CPU 49, and the dry water weight ffi (WS) per eye position time is calculated as 5.55 Kg/Hr using the following formula. Yes, 222 fWN)-40 (T) = 5. 55K
g/Hr (Is) The humidity of the dehumidified air generated from the dehumidifier 2 is controlled by the temperature control device 43 so that the calculated dry moisture per unit time (WS) becomes 5.55 Kg/Dr. The humidity of the dehumidified air is controlled by controlling the rotation speed of the compression rock 29 of the dehumidifying device 2 with the compressor motor 30, and the humidity of the dehumidified air is controlled by the compressor motor 30. The number of revolutions of the compressor motor 30 is controlled to increase or decrease to the number of revolutions set and stored in the CPU 49 separately, and the temperature of the dehumidified air is controlled by energizing the heater 34 to assist the dehumidified air. The exhaust fan motor 8 is configured to perform heating control and rotationally drive the exhaust fan 7.
It is configured to increase or decrease the volume of dehumidified air generated from the dehumidifying device 2 by controlling the rotation speed of the dehumidifying device 2.

If a drying time (T) of 50 hours is input, the dry moisture weight per unit time (Is) 4. The drying time (
T) When 10 hours are input, the dry water weight per eye position time is calculated as 22.2 Kg/Hr, and the capacity limit of the dryer 4 is 18 Kg/Hr of dry water weight. When the drying time (T) is 10 hours, the dry water weight is 22. :2Kg/Hr, which is above the capacity limit, and this drying time (T) of 10 hours is not input to the CPU 49, and drying is not started with this setting of drying time (T) to time.

The temperature and humidity of the dehumidified air generated from the dehumidifier 2 are detected by the temperature sensor 26 and the humidity sensor 54 and input to the CPU 49, and set from this input value and the dry moisture weight it (WS). The temperature and humidity of the dehumidified air are compared, and if they are different, the rotational speed of the compressor motor 30 and the start-up control of the heater 34 are performed so that the dehumidified air becomes the same as the set dehumidified air. This is a configuration in which drying is completed at a drying time (T) set by operating a timer setting switch 39.

It should be noted that FIG. 7 and parts of FIGS. 1 and 6 are views showing other embodiments. As shown in FIG. 55, an outside air inlet 56 for sucking outside air is provided on the ceiling plate of the dehumidifier 2, a rotatable on-off valve 57 is provided in the outside air inlet 56, and this on-off valve 57 The opening/closing position of the dehumidifier 2 is controlled by the rotation time of the opening/closing motor 58, which rotates in forward and reverse directions.
The dehumidified air generated from the outside air inlet 56 is mixed with the outside air taken in from the outside air intake port 56, and the mixed dry air is supplied from the air outlet 28 to the ventilation chamber 12, and from this ventilation chamber 12, the The grains are dried by passing through the drying chamber l.

The outside air humidity detected by the outside air temperature sensor 55 is
The converted value converted by the D converter 51 and the converted value by the A-D converter 51 are input to the input circuit 52, and the CPU 49 stores various data and drying data from the previous day. The grain moisture detected by the moisture sensor 24 of today's drying, the loaded grain weight detected by the weight sensor 3, the outside air temperature detected by the outside air temperature sensor 41, and the outside air humidity sensor 55 detected It may be configured such that the outside air humidity is compared with various data and drying data stored on the previous day to simulate drying, calculate the drying end time of the grains, and display it on the display window 40. It is also possible to perform post-hulling work in a planned manner by calculating the drying end time of the grains.

Hereinafter, the operation of the above embodiment will be explained.

By operating the setting knobs 38 and 39 of the operating device 6 to predetermined positions and operating the start switch 35 to start drying, each part of the grain dryer 4, the dehumidifier 2, and the moisture sensor 2 are adjusted.
4 is started, dehumidified air is generated from this dehumidifier 2, and this dehumidified air crosses the drying room 1 from the ventilation chamber l2, passes through the ventilation chamber 13, and is sucked and exhausted by the exhaust fan 7. The grains stored in the storage chamber 15 are exposed to the dehumidified air and dried while flowing down from the storage chamber 5 into the drying chamber 1, and then are fed to the lower part by the feeding valve 11 and flowed down to be collected. The grains are transferred and supplied from the inside of the gutter 10 through the supply gutter 22 into the grain raising machine 19 by the lower transfer spiral, and are conveyed to the upper part by the packet conveyor 20, and are supplied into the transfer gutter 17 via the dispensing cylinder 2l, and this transfer gutter 17 onto the diffusion plate 18 by the upper transfer spiral, and the diffusion plate 18 uniformly diffuses and supplies it into the storage chamber 15, where it is circulated and dried, and the moisture sensor 24 operates the moisture setting switch 38. When the moisture content of the grains is the same as the target moisture content set as the finishing target moisture content, the drying control device 42 of the operating device 6 automatically controls the dryer 4 to stop the drying of the grains.

During this drying work, the weight of the loaded grains loaded into the dryer 4 is detected by the weight sensor 3, and the detected weight of loaded grains and the initial moisture content of the grains detected by the moisture sensor 24 are detected. The weight of water removed until the grain is finished is calculated from the target moisture content set by the operation of the moisture setting function 38,
The dry water weight per unit time is calculated from this calculated water removed weight and the drying time set by the operation of the timer setting control 39, and the dehumidifier The temperature and humidity of the dehumidified air generated from 2 are set to predetermined temperature and humidity, and the grains are dried by controlling the dehumidified air to the set values.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a flowchart, Fig. 3 is an overall side view of the grain dryer, and Fig. 4 is A of Fig. 3. -A sectional view, 5th
The figure is a rear view of a part of the grain dryer, Figure 6 is a partially cutaway front view of a part of the grain dryer, and Figure 7 is a view showing another embodiment. It is an overall side view of a grain dryer. Explanation of symbols 1 Drying room 2 Dehumidifier 3 Weight sensor

Claims (1)

[Claims] In a grain dryer that dries grains by blowing dehumidified air through a dehumidifier 2 while letting them flow down into a drying chamber 1,
The water removed weight to be removed until the grain is finished is calculated from the loaded grain weight detected by the weight sensor 3, the initial moisture content of the grain, and the finishing target moisture, and the water removed weight and the set finish are calculated. A drying control method characterized in that a dry moisture weight per unit time is calculated from the drying time, and drying is performed by controlling the dehumidifying air based on the calculated dry moisture weight per unit time.