JPS62123281A - Cereal grain drying control system 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 allowed to flow down, while a blower was used to suck in hot air generated from a burner and outside air passing around the burner. The drying chamber is ventilated and the air is sucked and discharged by the exhaust fan, and the 'a particles flowing down the drying chamber are exposed to the hot air and the outside air and dried, and the moisture detection sensor detects the drying circulation. The moisture value of the grain inside is detected, the drying rate of the grain is detected from this detected moisture value, the detected drying rate is compared with the set drying rate, and if there is a difference, the detected drying rate is determined. At the same time, the temperature of the hot air generated from the burner is changed to a constant low temperature or high temperature, regardless of the detected grain moisture value detected by the moisture detection sensor, so that the drying rate is the same as the set drying rate, The suction outside air sucked by the exhaust M machine is kept at a constant JI.
The method was to dry grains by controlling JLFi increase or decrease.

Problem 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 by the burner and the outside air passing around the burner are removed by an exhaust fan. By sucking air into the drying chamber, the air is sucked and exhausted by the exhaust fan, and while the grains flowing down the drying chamber are exposed to this hot air and this outside air and are dried, they are detected by a moisture detection sensor. The moisture value of the grain during this drying circulation is detected, and the drying rate of the grain is detected based on this detected grain moisture value. Decrease rate and
If the detected drying rate and the set drying rate are different when compared with this control device, the temperature of the hot air generated from the burner is lowered to a certain temperature so that the detected drying rate becomes the same as the set drying rate. temperature,
Alternatively, in a dryer that dries grains by controlling the temperature to a high temperature and at the same time increasing or decreasing the amount of outside air sucked in by the exhaust fan, if the grains to be dried have a high moisture value, , it takes a long time for the grains to reach the set target finish moisture value and drying ends, but when the moisture value is low, it takes a long time for the grains to reach the set target finish moisture value and drying ends. The drying time is short, and when the drying time is short, the detected drying loss rate and the set drying rate are different, and in order to make the detected drying rate the same as the set drying rate, the burner If the temperature of the hot air generated by the exhaust fan and the outside air sucked by the exhaust fan are controlled to change over two fixed ranges, for example, the hot air temperature will be changed too high, and the amount of outside air sucked will be excessive. The grain temperature of the grains may rise abnormally and the grains may develop shell side, or the grains may become over-dried due to residual heat after drying. Contrary to the above, if the change control is performed with a constant change range, for example, the hot air temperature may be changed to too low a temperature, and the suction outside air may be too low, which may result in grain drying not being completed within a predetermined time. be.

Means for Solving the Problems This invention provides a drying chamber (2) below a storage chamber (1) for storing grains, and a drying chamber (2) is provided below the storage chamber (1) for storing grains, and the hot air generated from the burner (3) and the drying chamber (2) are connected to each other. The outside air passing around the drying chamber (
2) Provide ventilation and suction and exhaust with an exhaust fan (4),
The dryer has a moisture detection sensor (5
), and if the detected drying rate detected by this moisture detection sensor (5) differs from the set drying rate, the burner ( 3) The moisture detection sensor (5) is provided to change the temperature of the hot air generated by the exhaust fan (4) and the suction outside air sucked and exhausted by the exhaust fan (4).
A burner control device and an exhaust fan control device that control the change width of the hot air temperature and the change width of the sucked outside air to be changed based on the difference between the detected grain moisture value detected by the grain moisture value and the set finishing target moisture value. The grain drying control method of the grain dryer is characterized by the following features:

Effect of the Invention The grains flowing down from the storage chamber (1) into the drying chamber (2) are absorbed by the hot air generated from the burner (3) and the outside air passing around the burner (3). ) to the exhaust fan (4)
By suctioning and exhausting the air, the grains are dried by being exposed to this hot air and this outside air, and the moisture value of the grains during this drying circulation is detected by the moisture detection sensor (5), and the detected grain moisture value is The drying rate is detected by the controller, and this detected drying rate is compared with the set drying rate that has been set and stored in the control device.If there is a difference, the detected drying rate is changed to the set drying rate. At the same time, the burner control device changes the temperature of the hot air generated from the burner (3) to a low or high temperature so that When the grains are dried and smoked by controlling the wind to increase or decrease, and the moisture detection sensor (5) detects a grain moisture value that is the same as the set moisture value and the target moisture value, the control device automatically controls the dryer. Automatically stop.

When controlling the drying loss rate during this drying operation, if the difference between the detected grain moisture (fi) detected by the moisture detection sensor (5) and the grain finishing target moisture value is a large value, for example, A change in which the temperature of the hot air generated from the burner (3) is changed to a low temperature or a high temperature [During a change in which the opening is greatly changed and at the same time the suction outside air sucked by the exhaust fan (4) is increased or decreased. The grains are dried by controlling a large change in the moisture content of the grain.Contrary to the above, when the difference between the detected grain moisture value and the grain setting target moisture value is small, the hot air temperature is changed contrary to the above. The grains are dried by controlling small changes in the internal and suction outside air.

Effects of the Invention According to this invention, when grain drying is carried out by controlling the drying loss rate, when the grain to be dried has a high wood content and the difference from the grain's set finish target moisture value is large, the burner (3) The temperature of the generated hot air and the suction outside air sucked by the exhaust fan (4) are greatly changed and controlled, and contrary to the above, the drying grains have a low moisture value, and the set finish target moisture value of i9 grains. When the difference is small, contrary to the above, by controlling the hot air temperature and the suction outside air to a small value, it is possible to prevent the hot air temperature generated from the burner (3) from being changed too high or too low. Also, the outside air sucked in by the exhaust fan (4) will not be increased or decreased too much, and therefore the grains will not turn to the shell side or become overly dry. Drying does not end within a predetermined time, and grains can always be dried stably.

Embodiment In the example shown in Figure 1, the ja wall (7) of the dryer (6) has a rectangular shape in plan view that is long in the front and back direction, and consists of one front and rear wall plate and one left and right wall plate. 6), an operating device (8) for controlling start and stop, etc., and the a-wall (7).
The structure is equipped with a moisture detection sensor (5) that detects the moisture value of grains flowing down.

Located in the lower central part of the machine wall (7) and extending in the front-rear direction, there is a collection f9 gutter (9) that is V-shaped in front view and has a built-in transfer spiral that rotates and transfers grains. This grain collection gutter (9
) Drying chambers (2), (2) are provided in a hanging state on the upper side, and at the bottom of these drying chambers (2), (2) there are freely rotatable feeding valves (10), (10) that feed and flow the grains. It has a configuration in which it is supported by a shaft, and a two-stage pulley (
11), and subblocks 1-(12), (12) are fixed to the rear shaft ends of the delivery valves (10), (10).

A hot air chamber (13) is formed inside the drying chambers (2), (2), and communicates with a burner (3) built in a burner case (14) provided in the front wall plate. , 1. Air exhaust chambers (15), (15) are formed between the outside portion of the drying chamber (2), (2) and the left and right wall plates, and an air exhaust fan (15) provided on the rear wall plate portion is formed. 4), and the burner (3) is in communication with the burner (3).
) The structure is such that outside air and hot air generated from this burner (3) are sucked and exhausted from the outer periphery. The hot air chamber (13) and the exhaust chambers (15), (15) are provided with an inclined plate on the upper side and a partition plate on the lower side, and on the inner wall of the rear wall plate in the hot air chamber (13), The configuration includes a hot air temperature detection sensor (16) that detects the hot air temperature inside the hot air chamber.

A motor (17) and a transmission are provided at the lower part of the rear wall plate, a two-stage pulley (18) is fixed to the shaft end of the motor (17), and the transmission includes a pulley (19) having a transmission gear.
) and a sprocket (20), and the motor (17
) and the two-stage pulley (11) of the transfer spiral, a belt (21) is passed between the two-stage pulley (11) and the pulley (19) of the transmission. (22) and the sprocket (20) of the transmission and the delivery valve (10), (10)
said sprocket (+2).

(I2) is connected to a chain pulley (23), and a variable speed pulley (24) fixed to the two-stage pulley (18) of the motor (17) and the shaft end of the exhaust fan (4). It is a configuration in which the belt (25) is passed, and this belt (25) is passed.
5), a rotatable tension device (26) is provided on the rear wall plate at approximately the center of the i! ! (2
A solenoid (27) for rotating the exhaust fan (4) is provided, and this solenoid (27) is configured to operate in stages according to an electrical signal from the operating device (8). ) is configured such that the rotation of the exhaust fan (4) is decelerated or increased in steps, and the amount of outside air sucked by the exhaust fan (4) increases or decreases as a result of this increase/deceleration.

A fuel tank (28) is installed at the front of the dryer (6), a fuel pump (29) is installed at the outer side of the lower plate of the burner case (14), and a fuel hose (30) is installed from the fuel tank (28). ), this fuel pump (29)
This fuel is then passed through the fuel supply pipe (31) to the burner (3).
), and the combustion air is supplied to the blower duct l-(34) by rotating a blower (32) provided on the outer side of the upper plate of the burner case (14) with a blower motor (33).
) and into the burner (3).

A storage chamber (1) is formed above the drying chambers (2), (2), and a ceiling plate (35) is formed above the storage chamber (1).
(35), and a transfer gutter (36) with a built-in transfer spiral that rotates along the ceiling plates (35) and (35) to transfer grains, and this transfer gutter (36) - A supply port for supplying the transferred grains into the storage chamber (1) is opened in the center, and an enlarged n'1ac37) is provided at the bottom of this supply port,
The rotation of this diffusion plate (37) moves the grains into the storage chamber (
1) It has a structure that allows for uniform diffusion and reduction.

The grain elevating machine (38) is attached to the front part of the front wall board, and inside, a packet conveyor (39) belt is stretched between the upper and lower pulleys, and between the upper end and the starting end of the transfer gutter (36). A dispensing tube (40) is provided and communicated with the lower end and the grain collection gutter (9).
) A supply gutter (41) is provided to communicate with the terminal end, and a motor (4) is connected to the upper side of the elevator (38).
2), and this motor (42) rotates the packet conveyor (39) belt, the transfer spiral in the transfer gutter (36), the spreader plate (37), etc.

The moisture detection sensor (5) has a box shape, and a detection part for detecting moisture in grains is configured to protrude from inside the box, and this protruding detection part is in a state of protruding into the front wall board. At the same time, the moisture value of the crushed grains is detected, and the moisture value of the crushed grains is detected. The moisture detection sensor (5) is configured to detect the drying rate of grains by the operation device a! (8) The motor (43) installed inside the box is activated by the transmission of electrical measurement signals transmitted at predetermined intervals.
rotates, and the detection section is activated to detect the moisture value of the grain.

The operating device (8) is box-shaped, and the surface plate of the box has a start switch (44), a stop switch (45), a finish target moisture setting hole (4B), and a hot air temperature setting hole (47).
) and a display window, etc., and a control device (48) is provided inside, and this control device (48) includes the respective switches (44), (45), the respective setting switches (46), (47
), the moisture detection sensor (5) and the hot air temperature detection sensor (1B
) converts the detection value detected by the A-D converter (5
0), an input circuit (49) that inputs the converted value converted by this A-D converter (50), and these input circuits (49).
), a CPU (51) that performs arithmetic and logical operations and comparison operations on various input values input from (49);
1) has a burner control system g! ! (53) and an exhaust fan control device (54), and includes an output circuit (52) that receives and outputs various commands from the CPU (51), and these input circuits (49). ,(49),A-
The D converter (50), CPU (51) and output circuit (52) are connected, and this control device (48)
), each of the motors (17), (33), (42), (4
3) to control the start and stop of the burner control device (
53) changes the amount of fuel taken in by the fuel pump (29), and an exhaust fan control JI device (54) controls the operation of the solenoid (27) in stages.

The control device (48) sets the finishing target moisture content (4 days).
When the moisture detection sensor (5) detects a grain moisture value that is the same as the grain finishing target moisture value set by operating the grain,
The dryer (6) is configured to automatically stop, and the drying rate of the grain is detected based on the detected grain moisture value detected by the moisture detection sensor (5). It is configured to compare the set drying rate set and stored in the control device (48), and if the comparison results are different,
The hot air temperature and the suction outside air are set and stored in the burner control device (53) and the exhaust fan control device (54) so that the detected drying rate and the set drying rate are the same. Change −
The hot air temperature stored in this setting is
When the moisture value of the grain is high, the setting is stored so that a large value is changed and controlled, and when the moisture value of the grain is low, the setting is stored so as to be changed and controlled to a small value. Also, the suction outside air that has been set and memorized is set and memorized so that when the moisture value of the grain is high, a large value is changed and controlled, and when the moisture value of the grain is low, it is changed to a small value. Therefore, when the difference between the set finishing target moisture value and the detected grain moisture value is large, the hot air temperature and suction outside air to be changed and controlled are changed to large values. Contrary to the above, when the difference is small, the hot air temperature to be changed and the drawn outside air are 1# compositions that are controlled to change small values.

The burner control device (53) controls the hot air temperature setting device (53).
47) so that the set hot air temperature is reached.
The hot air temperature in the hot air chamber (13) is detected by the hot air temperature detection sensor (1B), and the detected hot air temperature and the set hot air temperature are compared. If there is a difference, the fuel pump (2S)
) to change and control the amount of fuel sucked in by this fuel pump (29).

The configuration is such that the detected hot air temperature is controlled to be the same as the set hot air temperature, and the moisture detection sensor (5) starts detecting the moisture value of the grains, and the detected grain moisture value determines whether the grains are dry. When a loss rate is detected, the detected drying rate is compared with a set drying rate to control the fuel pump (29), and the detection detected by the hot air temperature detection sensor (1B) The hot air temperature and the detected grain moisture value detected by the moisture detection sensor (5) are alternately displayed on the display window of the front panel of the operating device (8).

Each setting of the operating device (8) (46), (4?)
By operating the start switch (44), the dryer (6) is started, and at the same time hot air is generated from the burner (3) provided on the front wall plate, and this hot air and this burner (3) ) The outside air passing through the surrounding area is sucked in by the exhaust fan (4) installed on the rear wall plate, and the drying chamber (2) is ventilated from the hot air chamber (13) through the exhaust chamber (15). Exhaust fan (
The grains that are suctioned and exhausted in step 4) and stored in the storage chamber (1) of the dryer (6) are transferred from the storage chamber (1) to the drying chamber (2).
) is exposed to this hot air and this outside air while flowing down, and is dried, and is delivered to the lower part by the delivery valve (10).

Grain is transferred and discharged by the lower transfer spiral through the collection gutter (9) into the supply gutter (41), transported to the upper part by the grain raising machine (38), and supplied into the transfer gutter (36), and this transfer gutter ( 36), it is transferred and supplied via this transfer gutter (36) onto a diffusion plate (37), where it is evenly diffused and reduced into the storage chamber (1), and is circulated and dried. When the moisture detection sensor (5) detects a grain moisture value that is the same as the finishing target moisture value of the grain set in the finishing target moisture setting twist (46), the control device (48) of the operating device (8) The dryer (6) is automatically stopped under automatic control.

During this drying work, the drying rate of the grain is detected based on the detected grain moisture value detected by the moisture detection sensor (5), and this detected drying rate and the settings stored in the control device (48) are The drying loss rate is compared with this control device (4 days), and if the comparison result is different, the Pernal control device (53) and the exhaust fan control are set so that the detected drying rate is the same as the set drying rate. Device(
At the same time, the temperature of the hot air generated from the burner (3) is controlled to be changed to a high temperature or a low temperature by changing and controlling the hot air temperature and the suction outside air volume set in the exhaust fan (54).
) to dry the grains by controlling the increase or decrease of the suctioned outside air that is sucked and discharged at (4).
When the difference between the target finishing moisture value set by operating 6) and the detected grain moisture value detected by the moisture detection sensor (5) is large, the temperature of the hot air generated from the burner (3) The outside air sucked in by the exhaust fan (4) is controlled to have a large value to dry the grains. Contrary to the above, when the difference between the set finishing target moisture value and the detected grain moisture value is a small value, the hot air temperature and the sucked outside air are controlled to change to small values to dry the grains. .

The drying of the grains is controlled by the drying loss rate, and this control is based on the difference between the detected grain moisture value detected by the moisture detection sensor (5) and the set finishing target moisture value.

By controlling the change in hot air temperature and suctioned outside air, grains can be constantly and consistently dried.

[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 modified hot air temperature table, Fig. 3 is a modified suction outside air wind table, and Fig. 4 is a partial cross section of the dryer. Figure 5 is a rear view of the dryer, Figure 6 is a side view partially cut away, and Figure 7 is a front view of the dryer.
The figure is an enlarged front view of a part of the dryer. In the figure, reference numeral (1) indicates a storage chamber, (2) a drying chamber, (3) a burner, (4) an exhaust fan, and (5) a moisture detection sensor.

Claims (1)

[Claims] A drying chamber (2) is provided below the storage chamber (1) for storing grains, and the hot air generated from the burner (3) and the burner (3)
) is provided so that the outside air passing around the drying chamber (2) is sucked and exhausted by an exhaust fan (4). A moisture detection sensor (5) is provided to detect the drying rate by detecting the moisture content, and it is detected that the detected drying rate detected by the moisture detecting sensor (5) is different from the set drying rate. In order to make the drying rate the same as the set drying rate, the temperature of the hot air generated from the burner (3) and the sucked outside air sucked and exhausted by the exhaust fan (4) are provided to change, and the moisture detection sensor is installed. (5) A burner control device and an exhaust exhaust system that control the change range of the hot air temperature and the change range of the sucked outside air air to be changed based on the difference between the detected grain moisture value detected by the unit and the set finishing target moisture value. A grain drying control system for a grain dryer characterized by being equipped with a wind fan control device.