JPS6219677A - Drying control system of cereal grain of cereal grain 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] Industrial applications The present invention relates to a grain drying control method for a grain dryer.

Conventional technology In the past, grains stored in a storage chamber were fed out from the storage chamber into a drying chamber and dried while being exposed to hot air generated by a burner. The moisture value of the grain is detected, the grain drying rate is detected, and this detected drying rate is compared with a set grain drying rate that is set and stored in the control device. When the drying loss rate is different from the set drying rate, the temperature of the hot air generated from the burner is increased or decreased by a certain amount, and the temperature of the hot air generated from the burner is changed to a higher or lower temperature for finishing. This was a drying control method in which grains were dried until the moisture detection sensor detected a grain moisture value that was the same as the target moisture value.

Problems to be Solved by the Invention While the grains stored in the storage chamber are fed out from the storage chamber into the lower drying chamber and flowed down, the hot air generated from the burner is sucked by the exhaust fan, thereby removing the grains from the hot air chamber. drying room,
The grains flowing through the drying chamber are sucked and exhausted by the exhaust fan and are exposed to this hot air to dry them, while a moisture detection sensor detects the moisture value of the grains during drying. The drying rate of the grain is detected, and this detected drying rate is compared with a set grain drying rate that is set and stored in the control device, and the detected drying rate and the set drying rate are determined. If they are different, the temperature of the hot air generated from the burner is increased or decreased by a certain amount, and the temperature of the hot air generated from the burner is changed to a higher or lower temperature. In a dryer using a grain drying control method, in which drying of grains is stopped when the moisture detection sensor detects a moisture value of the grains that is the same as the moisture value, the drying speed of the grains is reduced when the moisture value approaches the set target moisture value. Therefore, in order to make the detected drying rate the same as the set drying rate, the temperature of the hot air generated from the burner must be changed to a high temperature. In this case, the grain temperature may rise abnormally, causing grains to form on the shell side or to break.

Means for Solving the Problems This invention provides a storage chamber (1) in the upper part for storing grains, a drying chamber (2) in the lower part through which the grains flow down, and a burner (3). The hot air generated by the hot air is sucked and exhausted from the hot air chamber (4) through the drying chamber (2) and the exhaust chamber (5) by the exhaust fan (6). A moisture detection sensor (7) is provided to detect the drying rate of the grain by detecting the moisture value of the grain during drying. Until the detected grain moisture value detected by the moisture detection sensor (7) exceeds a predetermined value near the set finishing target moisture value, the burner (3)
The temperature of the hot air generated from the burner (3) is changed and controlled, and when the detected grain moisture value becomes equal to or less than the predetermined value near the set finishing target moisture value, the temperature of the hot air generated from the burner (3) is changed and controlled. A grain drying control system for a grain dryer is configured, which is characterized by being provided with a control device that controls the hot air temperature at the current temperature.

Effects of the Invention The grains flowing down from the storage chamber (1) into the drying chamber (2) are transported by hot air generated from the burner (3) from the hot air chamber (4) to the drying chamber (2) and the exhaust chamber (5). ), the grains are sucked and exhausted by an exhaust fan (6), and are exposed to this hot air and dried, and the moisture value of the drying grains is detected by a moisture detection sensor (7). The drying rate of the grain is detected based on the moisture value, and the detected drying rate is compared with a set grain drying rate that is set and stored in the control device, and the detected drying rate is determined by the setting. When the drying rate is higher than the drying rate, the moisture detection sensor (7)
The detected moisture value detected by the controller is compared with this set finishing target moisture value, which is set as the grain finishing target moisture value, and the detected moisture value is determined as the set finishing target moisture value set and stored in the control device. When the temperature exceeds a predetermined value near the burner (3)
The temperature of the hot air generated from the burner (3) is controlled to decrease by a predetermined temperature amount set and stored in the control device, and the temperature of the hot air generated from the burner (3) is controlled to be changed to a lower temperature to dry the grains. Further, when the detected drying rate is equal to or higher than the set drying rate, and when the detected moisture value is below the predetermined value near the set finishing target moisture value, the burner ( 3)
The grains are dried at the hot air temperature generated by the drying process until drying is completed without changing or controlling the hot air temperature.

Contrary to the above, when the detected drying rate is less than the set drying rate and the detected moisture value is equal to or higher than the predetermined value near the set finishing target moisture value, the burner (3) generates The burner (3) controls the hot air temperature to increase by a predetermined amount.
The temperature of the hot air generated is changed to a high temperature and controlled to dry the grains. Also, when the detected drying rate is less than the set drying rate,
When the detected moisture value is less than or equal to the predetermined value near the set finishing target moisture value, the grains are dried without changing or controlling the temperature of the hot air generated from the burner (3) in the same manner as described above.

Effects of the Invention According to the present invention, the detected drying rate detected by the moisture detection sensor (7) is compared with the set drying rate set in the control device,
The temperature of the hot air generated from the burner (3) is changed to a high temperature or a low temperature so that the detected drying rate becomes the same as the set drying rate. This change control is performed by the moisture detection sensor (
This is done until the detected moisture value detected by 7) becomes close to the set finishing target moisture value, but when it gets close to the finishing target moisture value, the change control is no longer performed, so the burner ( 3) Since the temperature of the hot air generated by the drying process is not controlled to a high temperature, the temperature of the grains during drying will not rise abnormally, and as a result, the grains may develop on the shell side or be crushed. never occurs.

Embodiment In the illustrated example, the machine wall (9) of the dryer (8) has a rectangular shape in a plan view 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. 8) and an operating device (10) for controlling starting and stopping, etc., and the machine wall (9).
Moisture detection sensor (7) that detects the moisture content of the grains flowing through the interior and detects the drying rate of the grains based on the detected moisture value.
It has a structure in which it is detachably attached.

As seen from the front, a rotatably driven transfer spiral is provided between the machine wall (9) located in the center of the lower part and extending in the front and back direction.
A letter-shaped grain collection gutter (11) is provided, and drying chambers (2), (2) are provided vertically above the grain collection gutter (11) and communicated with each other, and the lower part of the drying chambers (2), (2) are connected to each other. The structure includes rotatably supported delivery valves (12), (12) for allowing the grains to flow down.

A hot air chamber (4) was formed inside the drying chambers (2), (2) and communicated with a burner (3) built into a burner case (13) provided in the front wall plate. Air exhaust chambers (5), (5) are formed between the outside of the drying chambers (2), (2) and the left and right walls and the plate, and air exhaust chambers (5), (5) are formed on the rear wall plate. It has a configuration in which it communicates with a wind fan (6), and the hot air chamber (4)
A hot air temperature detection sensor (10) is provided on the inner wall of the rear wall plate to detect the hot air temperature in the hot air chamber (4), and the hot air temperature detection sensor (10) detects the hot air temperature in the hot air chamber (4) and the exhaust chamber (5). It has a configuration in which an inclined plate is provided on the upper side and a partition plate is provided on the lower side, and a motor (15) is provided at the lower part of the rear wall plate, and this motor (15) moves the grain in the grain collection gutter (11). a transfer spiral, said delivery valve (12), (
12) and the exhaust fan (6).

A storage chamber (1) is formed above the drying chambers (2), (2), and ceiling plates (16), (16) are formed above the storage chamber (1).
), and a transfer gutter (17) with a built-in transfer spiral that rotates along these ceiling plates (18) and (16) is provided, and in the center of this transfer gutter (17), the transferred grains are A supply port for supplying into this storage chamber (1) is opened, a diffusion plate (18) is provided below this supply port, and this diffusion! The grains are uniformly diffused and returned into the storage chamber (1) by the rotational drive of (18).

A fuel tank (19) is installed at the front of the dryer (8), a fuel pump (20) is installed at the outer side of the lower plate of the burner case (13), and a fuel hose (21) is installed from the fuel tank (19). ), the fuel pump (20) and the fuel supply pipe (2
2), and the combustion air is supplied to the burner case (13) through a blower II (23) provided on the outer side of the upper plate, which is rotated by a blower motor (24). the burner (3) through the ventilation duct (25).
) is configured to blow air into the inside.

The lift 4IjJa (2B) is removably attached to the front part of the front wall plate, and a bucket conveyor (27) belt is stretched between the upper and lower pulleys inside, and between the upper end and the starting end of the transfer gutter (17). A dispensing pipe (28) is provided for communication, and a supply gutter (29) is provided between the lower end and the terminal end of the grain collection gutter (11).
are provided and communicated with each other, and the upper part of the grain hoist (2B) is provided with a motor (30), which drives the packet conveyor (27) belt and the transfer spiral in the transfer trough (17). It is configured to rotate and drive.

The moisture detection sensor (7) has a box shape, and a detection part for detecting moisture in grains is configured to protrude from inside the box. Attached to the front wall plate, a part of the grains flowing down inside the machine wall (9) is crushed under pressure by the detection part, and at the same time, the moisture value of the crushed grains is detected, and the detected moisture value is detected. The moisture detection sensor (7) is configured to detect the drying rate of grains based on the value, and the moisture detection sensor (7) is activated by the motor (31) installed inside the box body by sending an electrical measurement signal from the operating device (lO). The structure is such that the moisture detection sensor (7) is activated by rotation.

The operating device (10) has a box shape, and a start switch (32), a stop switch (33), a target moisture setting hole (30), a hot air temperature setting hole (35), etc. are provided on the surface of the box. , a control device (36) is provided inside, and this control device f
f1 (3B) is an input circuit (37) into which the operations of the switches (32), (33) and the setting knobs (34), (35) are input, the moisture detection sensor (7), and the hot air. The detection value detected by the temperature detection sensor (14) is A-D.
A-D converter (38) to convert, this A-D converter (3
Input circuit (37) for inputting the converted value converted in step 8)
, a CPU (CPU) that performs arithmetic and logical operations and comparison operations on various input values input from these input circuits (37) and (37).
39) and an output circuit (40) that receives and outputs various commands from the CPU (39), and each of these input circuits (37), (37), and an A-D converter (38). , CPU (39) and output circuit (4
0) is a connected configuration, and this control device (3B) controls the fuel pump (20) and the moisture detection sensor (7).
The motor (31) of the dryer (8) and the motors (15), (24), (30) of the dryer (8) are controlled such as starting and stopping.

When the moisture detection sensor (7) detects a grain moisture value that is the same as the grain moisture value set by operating the target moisture setting (30), the control device (3B) (3B) to automatically stop the dryer (8), and the detected grain moisture value detected by the moisture detection sensor (7) is displayed on the display window on the surface of the operating device (lO). This moisture detection sensor (
7) detects the grain drying rate based on the detected moisture value detected by the controller (3G), and the detected drying rate and the set grain drying rate set and stored in the control device (3G). When the detected drying rate is greater than or equal to the set drying rate, the detected moisture value detected by the moisture detection sensor (7) is equal to the target moisture setting level (the set finishing target set at 30). When the moisture value is equal to or higher than a predetermined value set and stored in the control device (3B) near the moisture value, the temperature of the hot air generated from the burner (3) is set and stored in the control device (3B). The temperature of the hot air generated from the burner (3) is changed to a lower temperature by decreasing the predetermined temperature amount, and the detected moisture value is set to the predetermined value near the set finishing target moisture value. In the following cases, the temperature of the hot air generated from the burner (3) is not changed and controlled, but the temperature of the hot air is controlled at the time when the detected moisture value of the grain becomes equal to or less than the predetermined value.

Contrary to the above, when the detected drying rate is less than the set drying rate and the detected moisture value is equal to or higher than the predetermined value near the set finishing target moisture value, the burner (3) generates The configuration is such that the temperature of the hot air generated from the burner (3) is changed to a high temperature by increasing the predetermined temperature amount by 1 degree, and the detected moisture value is adjusted to the set finish target moisture content. When the value is below the predetermined value, the temperature of the hot air generated from the burner ('3) is not changed and controlled, and the hot air at the time when the detected moisture value of the grain becomes below the predetermined value. The structure is controlled by temperature.

When starting drying work, the control device (36) controls the control device (36) to supply fuel into the burner (3) so as to reach a set hot air temperature set by operating the hot air temperature setting knob (35). The fuel pump (20) is configured to control the fuel pump (20), and when the moisture detection sensor (7) starts detecting the drying loss rate of the grains, the fuel is pumped so that the hot air temperature is controlled by the control device (3B). The pump (20) is controlled so that the hot air temperature is detected by the hot air temperature detection sensor (14) and the detected hot air temperature is the same as the hot air temperature controlled by the control device (3B). This configuration controls the fuel pump (20) to change and control the flow rate of fuel supplied into the burner (3).

Each setting of the operating device (lO) (34), (35
) and the start switch (32) to start the dryer (8), and at the same time hot air is generated from the burner (3) installed on the front wall plate, and this hot air is sent to the rear wall plate. By suctioning and exhausting air with the exhaust fan (6) installed in the section,
The drying room (2) is ventilated from the hot air room (4), and the dryer (8
) The grains stored in the storage chamber (1) of this storage chamber (L
) is exposed to this hot air while flowing down in the drying chamber (2) and dried, and is fed out to the lower part by the feeding valves (12), (12), and sent to the collecting trough (11) by the lower transfer spiral. It is then transferred and discharged into the supply gutter (23), conveyed to the upper part by the hoisting machine (26), and spread through the transfer gutter (17) by the upper transfer spiral!
A (18) is transferred and supplied, and on this diffusion plate (1 day), it is evenly diffused and reduced into the storage chamber (1), and is circulated and dried to achieve the finish set in the target moisture setting hole (34). When the moisture detection sensor (7) detects the moisture value of the grains that is the same as the target moisture value, the dryer (8) is automatically stopped under automatic control by the control device (36) of the operating device (10).

During this drying work, the detected drying rate detected by the moisture detection sensor (7) and the set grain drying rate set in the control device (36) are compared, and this detected drying rate is determined by the set drying rate. When the lapse rate is below, and when the detected moisture value is equal to or higher than a predetermined value set in the control device (3B) near the set finish target moisture value, the temperature of the hot air generated from the burner (3) is controlled. The predetermined temperature stored in the device (36) is increased and the temperature of the hot air generated from the burner (3) is changed to a high temperature so that the detected drying rate becomes the same as the set drying rate. To,
Dry the grains. Also, when the value is below the specified value,
without changing or controlling the temperature of the hot air generated from the burner (3);
The grains are dried at the hot air temperature at which the detected moisture value of the grains becomes equal to or less than the predetermined value until drying of the grains is completed.

Contrary to the above, when the detected drying rate is equal to or higher than the set grain drying rate, and when the detected moisture value is equal to or higher than the predetermined value near the set finishing target moisture value, the burner ( 3)
The temperature of the hot air generated from the burner (3) is reduced by the predetermined temperature amount, and the temperature of the hot air generated from the burner (3) is changed to a lower temperature, so that the detected drying loss rate becomes the same as the set drying rate. To dry the grain. In addition, when the temperature is below the predetermined value set in the same manner as above, the temperature of the hot air generated from the burner (3) is not changed and controlled, and the hot air temperature is changed to the temperature at the time when the detected moisture value of the grain becomes below the predetermined value. , dry the grain until the grain is finished drying.

The detected drying rate detected by the moisture detection sensor (7) is compared with the set drying rate, and the temperature of the hot air generated from the burner (3) is controlled so as to be equal to the set drying rate. However, this hot air temperature control is not performed when the temperature falls below the predetermined value near the set finish target moisture value, so that the grain temperature of the grains during drying will not rise abnormally. The kernels do not develop shell side or breakage.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 being a block diagram and FIG. 2 being a partially cutaway front view. FIG. 3 is a partially cutaway side view, and FIG. 4 is an enlarged front view of a portion of the dryer. In the figure, symbol (1) is a storage chamber, and symbol (2) is a drying chamber. (3) is a burner, (4) is a hot air chamber, (5) is an exhaust chamber, (
6) shows an exhaust fan, and (7) shows a moisture detection sensor.

Claims (1)

[Claims] A storage chamber (1) for storing grains is provided in the upper part, a drying chamber (2) is provided in the lower part for the grains to flow down, and a burner (3) is provided in the lower part.
) from the hot air chamber (4) to the drying chamber (2).
A ventilation chamber (5) is provided to suck and exhaust air with an exhaust fan (6), and the storage chamber (1) is equipped with a storage chamber (1) that detects the moisture content of the grains during circulation drying. A moisture detection sensor (7) for detecting the moisture content is provided, and this moisture detection sensor (7)
The moisture detection sensor (
7) changes and controls the temperature of the hot air generated from the burner (3) until the detected grain moisture value is equal to or higher than a predetermined value near the set finish target moisture value, and the detected grain moisture value is adjusted to the set finish target moisture value. The burner (
3) A grain drying control system for a grain dryer, characterized in that a control device is provided to control the temperature of the hot air generated at that point in time without changing the temperature of the hot air.