JPS6219678A - 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. Moisture is detected, the drying rate of the grain is detected based on this detected moisture value, the detected drying rate is compared with a set drying rate, and the detected drying rate and the set drying rate are calculated. This was a grain drying control system in which the temperature of the hot air generated from the burner was controlled to increase or decrease by a certain amount so that the temperature remained the same when the values were different, thereby drying the grains.

Problem to be Solved by the Invention The grains stored in the storage chamber are fed out from the storage chamber into the drying chamber at the bottom, and the hot air generated by the burner is sucked by the exhaust fan, thereby drying the grains from the hot air chamber. room,
The grains flowing through the drying chamber are sucked and exhausted by the exhaust fan and are dried by exposing them to this hot air, while a moisture detection sensor detects the moisture content of the drying grains. The drying rate of the grain is detected based on the detected moisture value, and the detected drying rate is compared with a set drying rate, and when the detected drying rate is less than the set drying rate, the burner is The temperature of the hot air generated from the burner is increased by a certain amount and controlled to a high temperature to dry the grains, and when the detected drying rate is higher than the set drying rate, the temperature of the hot air generated from the burner is increased by a certain amount. This dryer uses a drying control method that automatically stops the dryer when the moisture detection sensor detects a moisture value of the grains that is the same as the finishing target moisture value. When the detected drying rate and the set drying rate are different,
By controlling the temperature of the hot air generated by the burner to increase or decrease by a certain amount, when the amount of grain stored in the dryer is small, the amount heated by the burner is small; The amount of change in the temperature of the hot air generated from the burner becomes too large, and the temperature of the hot air generated from the burner becomes too high, making it difficult for the drying rate of grains to become the same as the set drying rate. At the same time, the grains may become over-dried, resulting in IH cracking or crushed grains.

Contrary to the above, when the amount of grain stored in the dryer is large, the amount heated by the burner is large, and the amount of change in the temperature of the hot air generated by the burner is small. Then, the temperature of the hot air generated by the burner becomes too low, making it difficult for the drying rate of the grains to be the same as the set drying rate, and at the same time, the grains are not dried within the predetermined drying time. It may not finish.

Means for Solving the Problems This invention provides a storage chamber (1) for storing grains in the upper part, a drying chamber (2) for the grains to flow down in the lower part, and a burner (3). ) is provided so that the hot air generated from the hot air chamber (4) is suctioned and exhausted by an exhaust fan (6) via the drying chamber (2) and the exhaust chamber (5). A moisture detection sensor (7) is provided to detect the moisture content of the grains during circulation drying and to detect the drying loss rate.
7) is provided to change and control the temperature of the hot air generated from the burner (3) so that the drying rate of the grain based on the moisture detected by the burner (3) is the same as the set drying rate, and the change control amount for this change control is The grain is characterized in that it is controlled by providing a control device that performs small control changes when the amount of heating of the hot air generated by the burner (3) is small, and controls a large amount when the amount of heating is large. The grain dryer is configured with a grain drying control system.

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). ) and exhaust air I! (6), the grains are exposed to this hot air and dried, and the moisture in the drying grains is detected by the moisture detection sensor (7).
), the drying rate of the grain is detected based on the detected moisture value, and the detected drying rate is compared with the set grain drying rate that is set and stored in the control device. When the detected drying rate is different from the set drying rate, the temperature of the hot air generated from the burner (3) is increased or decreased so that the detected drying rate is the same as the set drying rate. Control or change to high temperature.

In addition, the grains are dried by changing the temperature to a lower temperature, and when the moisture detection sensor (7) detects a grain moisture value that is the same as the finishing target moisture value, the control device automatically controls the dryer to automatically stop the dryer. do.

If the detected drying rate detected by the moisture detection sensor (7) during this drying operation is different from the drying loss rate set in the control device, the heating amount of the hot air generated from the burner (3) The temperature of the hot air generated from the burner (3) is changed and controlled, for example, as the amount of heating heated by the burner (3) decreases, the temperature of the hot air generated from the burner (3) changes. The amount of change is successively controlled to be small and the grains are dried.Contrary to the above, as the amount of heating heated by the burner (3) increases, the amount of heat generated by the burner (3) increases. The amount of change in the hot air temperature is successively controlled in large quantities to dry the grains.

Effects of the Invention According to this invention, the detected drying rate detected by the moisture detection sensor (7) and the set drying rate are compared, and the 8- The temperature of the hot air generated from the burner (3) is changed and controlled, and this hot air temperature change control amount is changed and controlled by the heating amount of the hot air temperature generated from the burner (3). When the amount of grains to be dried is small, the heating amount of the burner (3) is also small, and in such a state, the amount of change in the temperature of the hot air generated from the burner (3) is small. As a result, the temperature of the hot air generated from this burner (3) does not become too high, so that the detected drying rate is likely to be the same as the set drying rate, and at the same time, the grains are not over-dried. Therefore, the burner (3
) is also large, and in such a state, the amount of change in the temperature of the hot air generated from the burner (3) becomes large, so that the temperature of the hot air generated from the burner (3) decreases. Since the temperature does not become too high, the detected drying rate is likely to be the same as the set drying rate, and at the same time, the grains are completely dried within a predetermined time.

Embodiment In the illustrated example, the machine wall (9) of the dryer (8) has a rectangular shape in 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) an operating device (io) that controls starting, stopping, etc., and a moisture device that detects the moisture in the grain flowing down inside the machine wall (9) and detects the drying rate of the grain based on this detected moisture value. It has a configuration in which a detection sensor (7) is detachably attached.

A grain collection gutter (11), which is V-shaped in front view and has a built-in transfer spiral, is provided between the central part of the lower part of the a-wall (9) and extending in the front and back direction. 11) At the top, drying chambers (2), (2) are formed in the vertical direction between the left and right ventilation mesh plates and communicated with each other, and at the bottom of these drying chambers (2), (2), there is a feeder for feeding out the grains and letting them flow down. It has a structure in which pulps (12), (12) are rotatably supported.

An inclined plate is provided on the upper side of the six ventilation mesh plates, a partition plate is provided on the lower side, and a hot air chamber (4) is formed between the inner ventilation mesh plates,
It is configured to communicate with a burner (3) built into a burner case (13) provided in the front wall plate, and a ventilation chamber ( 5), (5)
is formed and communicated with the exhaust fan (6) provided in the rear wall plate section. In the hot air chamber (4), a hot air temperature detection sensor (14) for detecting the hot air temperature in the hot air chamber (4) is provided on the inner wall of the rear wall plate, and a motor (15) is provided on the lower part of the rear wall plate. ), and the motor (15) operates the grain collection gutter (11).
), the delivery valves (12), (12), the exhaust fan (6), etc. are rotated.

A fuel tank (IB) is installed at the front of the dryer (8), and a fuel pump (IB) is installed at the outer side of the lower plate of the burner case (13).
17), and a fuel hose (
18), the fuel pump (17) and the fuel 9F supply pipe (18)
), and the combustion air is generated by rotating a blower (20) provided on the outer side of the upper plate of the burner case (13) with a blower motor (21). The structure is such that air is blown into the burner (3) through the air duct (22).

A storage chamber (1) is formed above the drying chambers (2), (2), and ceiling plates (23), (23) are formed above the storage chamber (1).
A transfer gutter (24) with a built-in transfer spiral is provided along the transfer gutter (24), and a supply port for supplying the transferred grains into the storage chamber (1) is opened in the center of the transfer gutter (24). A diffusion plate (25) is provided at the lower part of the supply port, and this diffusion plate (25) is configured to evenly diffuse and dry the grains into the storage chamber (1).

Raised grain I! (2B) is detachably attached to the front part of the front wall board, and a packet conveyor (27) belt is stretched between the upper and lower pulleys inside, and a packet conveyor (27) belt is stretched between the upper and lower pulleys, and between the upper end and the starting end of the transfer gutter (24) A dispensing tube (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) for communication. 2B) A motor (3o) is provided on the upper side, and this motor (30) drives the packet conveyor (27) belt and the transfer gutter (2o).
4) is configured to rotationally drive the transfer spiral, etc.

The moisture detection sensor (7) has a box shape, and a detection part for detecting moisture in grains is configured to protrude from the inside of the box,
This protruding detection part is attached to the front wall plate in a state of protruding into the front wall plate, and at the same time crushes grains flowing down inside the machine wall (9) under pressure with the detection part, the crushed grains are crushed. The moisture detection sensor (7) detects the moisture content of the grains and detects the drying rate of the grains based on the detected moisture value. The motor (31) inside the body rotates and this moisture detection sensor (7) is activated.
Depending on the grain drying rate detected by the burner (3)
) The temperature of the hot air generated fluctuates.

The operating device (10) is box-shaped, and has a start switch (32), a stop switch (33), a target moisture setting hole (34), a hot air temperature setting hole (35), etc. on the surface, and a lower plate. The outside part is provided with an outside temperature detection sensor (38) for detecting the outside air temperature, and the inside is provided with a control device (37), and this control device (37) is connected to each switch (38).
32), (33), and each setting (34), (3
5), an input circuit (38) into which operations such as the above are input, the moisture detection sensor (7), and the hot air temperature detection sensor (14).
and an A-to-D converter (39) that converts the detected value detected by the outside temperature detection sensor (3B), and an input circuit (39) that inputs the converted value converted by the A-D converter (39).
38) A CPU (40) that performs arithmetic and logical operations, comparison operations, etc. on various input values input from these input circuits (38) and (38), and outputs in response to various commands issued by this CPU (40). The configuration includes an output circuit (41), etc., and the input circuits (38), (3B), and the A
- a converter (39), the CPU and the output circuit (41);
) are connected, and this control device (37) controls the motor (31) of the moisture detection sensor (7), each of the motors (15), (21), (30), and the fuel pump (17). ), etc., are controlled to start and stop.

When the moisture detection sensor (7) detects a grain moisture value that is the same as the finishing target moisture value set by operating the target moisture setting interrogator (34), the control device (37) controls the dryer (
8) is configured to automatically stop the moisture detection sensor (
7) Detected grain drying rate and this control device! (37)
The burner (
3) It is configured to change and control the temperature of the hot air generated from
This hot air temperature change W amount is determined by detecting the hot air temperature generated from the burner (3) by the hot air temperature detection sensor (14), and combining this detected hot air temperature with the outside temperature detection sensor (3B).
) is compared with the outside air temperature detected by the burner (3).
The heating amount is detected, and when the detected heating amount is small, the heating amount is controlled by a small amount, and when the heating amount is large, the heating amount is controlled by a large amount. For example, when the detected drying rate is 0.2% lower than the set drying rate and the heating amount is 10 degrees, the burner (3)
The temperature of the hot air generated is changed to a high temperature and controlled, and the heating is also carried out! When the equation is 30 degrees, the temperature of the hot air generated from the burner (3) is changed to a high temperature by 6 degrees. Various temperature amounts to be changed and controlled are set and stored in the control device 21 (37) according to the difference in the drying loss rate and the heating amount,
The configuration is such that the stored temperature amount is changed and controlled.

The grain moisture value detected by the moisture detection sensor (7) is displayed on a display window on the surface of the operating device (10).

The control device (37) controls the fuel pump to supply fuel into the burner (3) so that the set hot air temperature is reached by operating the hot air temperature setting knob (35) at the start of drying work. (17), and when the above-mentioned drying rate detection is started, the grains are fed into the burner (3) so that the drying rate of the grains becomes the same as the set drying rate. The fuel pump (17) that supplies fuel is controlled to control the fuel stoichiometry, and this hot air is detected by the hot air temperature detection sensor (14).

The fuel pump (17) is controlled so that the detected hot air temperature is the same as the hot air temperature controlled by the control device (37).

In addition, the amount detection sensors for detecting the amount of grains accommodated in the drying m (8) are provided at appropriate intervals in the vertical direction in the center of the inner wall of the front wall plate, and the moisture detection sensors (7)
Detection of the charging amount by which the charging amount detection sensor detects a change control amount of the hot air temperature generated by the burner (3) so that the detected grain drying rate detected by the sensor becomes the same as the set drying rate. It may be configured such that a small amount change is controlled when the detected amount is small, and a large amount change is controlled when the detected amount is large. , the amount of change mEk in the hot air temperature generated from the burner (3) is detected by the outside air relative humidity so that the detected grain drying rate detected by the moisture detection sensor (7) is the same as the set drying rate. It may be configured such that when the detected outside air relative humidity detected by the sensor is low, small change control is performed, and when the detected outside air relative humidity is high, large amount change control is performed. When the temperature is high, the change control amount of the hot air temperature generated from the burner (3) may be controlled by a small amount, and when the detected outside air temperature is low, the control amount may be changed by a large amount.

By operating each setting knob (34), (35) of the operation device 71 (10) and operating the start switch (32),
At the same time as the drying fi (8) starts, hot air is generated from the burner (3) installed on the front wall plate, and this hot air is sucked and exhausted by the exhaust fan (6) installed on the rear wall plate. , the drying chamber (2) is ventilated from the hot air chamber (4), and the dryer (8)
The grains stored in the storage chamber (1) are stored in the storage chamber (1).
While flowing down inside the drying chamber (2), it is dried by this hot air, and is delivered to the lower part by the delivery valve (12), and is transferred to the lower part! ! L: Grain collection gutter (11) with a whirlpool and then the supply gutter (2)
8) The grain is transferred and discharged into the interior, transported to the upper part by the raising machine (26), passed through the transport gutter (24) by the transport spiral at the upper part of 5, and then transferred to the spreading plate (
25) It is transferred and supplied to the top, is evenly diffused and returned into the storage chamber (1) by this diffusion plate (25), is circulated and dried, and is controlled by the target moisture setting controller (34) of the operating device (IO). When the moisture detection sensor (7) detects the same grain moisture value as the set finishing target moisture value, the control device (10) of the operating device (10)
37) to automatically stop the dryer (8).

During this drying work, the detected grain drying rate detected by the moisture detection sensor (7) is compared with the set drying rate set in the control device (37), and the detected drying rate is determined by the set drying rate. The temperature of the hot air generated by the burner (3) is changed and controlled so that it becomes the same as the lapse rate, but this change control amount is changed and controlled by the amount of heating heated by the burner (3). As the amount of heat decreases, the temperature of the hot air generated from the burner (3) is lowered or raised to a higher temperature to dry the grains. In addition, contrary to the above, as the heating amount increases, the burner (3)
The grains are dried by lowering or increasing the temperature of the hot air generated by the process.

The temperature of the hot air generated from the burner (3) is changed and controlled so that the drying rate detected by the moisture detection sensor (7) becomes the same as the set drying rate. ), the grains can always be dried at the set drying loss rate, which is stable regardless of the amount of grains to be dried.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1' is a block diagram, Figure 2 is a partially cutaway front view, and □
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, (1) is the storage chamber, (2) is the drying chamber, (3) is the burner, (4) is the hot air chamber, (5) is the exhaust chamber, (6) is the exhaust fan, and (7) is the moisture content. Detection sensor is shown.

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 to detect the drying rate. A moisture detection sensor (7) is provided for this purpose, and the hot air generated from the burner (3) is installed so that the drying rate of the grain based on the moisture detected by the moisture detecting sensor (7) is the same as the set drying rate. It is provided to change and control the temperature, and the change control amount to be changed is controlled by a small amount when the heating amount of the hot air generated from the burner (3) is small, and is changed by a large amount when the heating amount is large. A grain drying control system for a grain dryer, which is characterized in that a control device is provided to control the grain drying machine.