JPS6387583A - Grain discharge control method of grain dryer - Google Patents

Abstract

(57) [Abstract] 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 discharge control method for a grain dryer.

Conventional technology In the past, grains were circulated downward in a drying chamber, and the flowing grains were sucked by hot air generated from a burner and outside air passing around the burner using an exhaust fan.
This hot air and outside air mix to become hot air for drying, and while the grains are exposed to this hot air for drying and dried, a moisture sensor detects the moisture value of the grains during this circulation drying. When a grain moisture value that is the same as the finishing target moisture value is detected, the drying operation is stopped, and when performing the discharge operation to discharge the dried grains outside the machine, the hot air generated from the burner is stopped. In this method, outside air passing around the burner was sucked in by the blower, and the dried grains were discharged outside the machine while being exposed to the outside air.

Problem to be Solved by the Invention When the drying process is performed to discharge the dried grains from the dryer outside the dryer after the drying of the grains is completed, the hot air generated from the burner is stopped and the surrounding area of the burner is By sucking the outside air passing through the machine with the exhaust fan and discharging the dried grains outside the machine while exposing them to the outside air, if the outside air humidity is high during this discharge operation, the equilibrium moisture content of the outside air will also decrease. If the equilibrium moisture content is higher than the moisture value of the dried grains to be discharged, the dried grains will absorb moisture, and this moisture absorption may cause the dried grains to have many shells. Ta.

Means for Solving the Problems This invention ventilates and sucks hot air generated from a burner (2) and outside air passing around the burner (2) into a drying chamber (1) where grains flow down. An exhaust fan (3) that discharges air, a moisture sensor (4) that detects the moisture value of the grains that are circulated and dried in the drying room (1) at predetermined time intervals, and further detects the outside air temperature. An outside air temperature sensor (5) and an outside air humidity sensor (6) for detecting outside air humidity are provided,
The equilibrium moisture content of the outside air is calculated based on the outside air temperature detected by this outside air temperature sensor (5) and the outside air humidity detected by this outside air humidity sensor (6), and when performing a discharge operation to discharge dried grains to the outside of the machine. In the dryer, the hot air generated from the burner (2) is stopped and the outside air passing around the burner (2) is sucked and exhausted by the exhaust fan (3), and the dried grains are removed from the machine. During the discharge operation, when the calculated equilibrium moisture content of the outside air obtained by the calculation is equal to or higher than the discharge grain moisture value, the suction wind is stopped to stop the outside air being sucked and exhausted by the exhaust fan (3). The structure of the grain discharge control system is characterized by the provision of a control device.

Effect of the Invention After the drying of the grains is completed, when carrying out the discharge operation of discharging the dried grains from the dryer, the burner (2
), the hot air generated from the burner (2) is stopped, and while the exhaust fan (3) sucks the outside air passing around the burner (2), the outside air temperature sensor (5) detects the detected outside air temperature and the outside air humidity sensor ( According to the detected outside air humidity detected by 6),
The equilibrium moisture content of the outside air is calculated, and the calculated equilibrium moisture content of the outside air obtained by this calculation is compared with the moisture value of the dried grains to be discharged. If there is, the exhaust fan (3) is stopped and controlled by the suction wind stop control device, and the exhaust fan (3) is not sucked in outside air, and the dried grains are discharged from the inside of the dryer to the outside of the dryer. .

Effects of the Invention According to the present invention, when performing a discharge operation to discharge dried grains to the outside of the machine, the outside air temperature and humidity detected by the outside air temperature sensor (5) and the outside air humidity sensor (6) are used to The equilibrium moisture content of the outside air is calculated, and the suction of the outside air sucked and exhausted by the exhaust fan t31 is stopped based on the calculated equilibrium moisture content of the outside air obtained by this calculation and the moisture value of the dried grains to be discharged. As a result, the dried grains are not exposed to high-humidity outside air, so they do not absorb moisture. Therefore, the dried grains do not turn to the shell side, and the quality is always stable. dried grains can be obtained.

Embodiment In the illustrated example, the machine wall (8) of the dryer (7) has a rectangular shape that is long in the front-rear direction when viewed from above, and consists of one front and rear wall plate and one left and right wall plate. 7) is equipped with an operating device M (9) for starting and stopping the burner (2), and a burner case ill equipped with an exhaust fan (3) on the rear wall plate. In the center of the lower part of the machine wall (8), there is a grain collection @ (121) equipped with a transfer spiral, and above the grain collection gutter there is a drying chamber (121) with a feed valve (13+) rotatably supported at the bottom. ) are arranged in parallel and communicated with each other, and a hot air chamber (B) is formed between the insides of the drying chambers (1) and (1), and communicated with the burner (2). A hot air temperature sensor (ISl) was provided to detect the hot air temperature in the hot air chamber 04, and an air exhaust chamber (IL IIG) was formed outside the drying chamber fil (1) and communicated with the air exhaust fan (3). The rear wall plate is equipped with a motor (II).
3, this motor (■ rotates and statically moves the transfer spiral and the delivery valve (13, (13, etc.), and the motor (formerly used to rotate and drive the exhaust fan (3), RoomflL
(A valve that can be opened and closed may be provided at the terminal end of +61, and this valve may be opened and closed by the rotation of a motor.

A fuel pump 0υ having a fuel valve is provided on the outside of the lower plate of the burner case 0[1, and this fuel pump (1υ) is configured to suck in fuel from the fuel tank (lCI) and supply it into the burner (2). A blower (to) and a motor 3υ are provided on the outside of the upper plate, and the rotation of this motor 2υ drives this blower to rotate, and this blower (to) supplies combustion air into the burner (2). It is also possible to provide a valve that can be opened and closed at the front of the burner case (11), and to open and close this valve by rotation of a motor.

A storage chamber t23 is formed above the drying chamber (1), (1), and this storage chamber I2? On the upper side of J, there is a ceiling plate (to) and a transfer gutter G with an internal transfer spiral! 41, a supply port for supplying transferred grains into this storage chamber C3 is provided in the center of this transfer gutter (C), and a diffusion plate (to) is provided below this supply port.
Furthermore, a discharge funnel equipped with a discharge shutter is provided on the bottom plate of the starting end of the transfer gutter e4, and a discharge tube ω is provided at the lower end of the discharge funnel.

A grain hoist is attached to the front part of the front wall plate, and a bucket conveyor belt is stretched between the upper and lower pulleys inside, and a grain elevator is installed between the upper end and the starting end of the transfer @ (24). A tube (5) is provided for communication, a supply gutter (to) is provided between the lower end and the terminal end of the grain collecting gutter for communication, and a motor is installed in the upper part of the grain hoist. 129 is provided, and this motor C! l
The packet conveyor czFj belt, the transfer gutter 4
The structure is such that the transfer spiral and the diffusion plate O1 within the grain hoist are rotationally driven, and a moisture sensor (4) is provided approximately at the center of the grain hoist 4 in the vertical direction.

The moisture sensor (4) receives grains that fall while being conveyed to the upper part by the packet conveyor (2), supplies the grains into the moisture sensor (1), and crushes the supplied grains under pressure. At the same time, the moisture sensor (4) is configured to detect the moisture value of the crushed grains, and this moisture sensor (4) is connected to the operating device (9).
The motor 0υ in this moisture sensor (4) rotates due to the transmission of an electrical measurement signal transmitted at predetermined time intervals from , and the rotation of this motor Gυ causes this moisture sensor +4
Each part operates to detect the moisture value of the grain.

The operating device (9) is box-shaped, and the surface plate of the box has a staking operation start switch (to) for starting and stopping the dryer (7) for each operation, and a drying operation start switch. 0 discharge work start switch (b), stop switch (
(to), set the target moisture value for finishing (to), set the target moisture value (to), and the burner! 2) A display window that alternately displays the detected moisture value detected by the moisture sensor (4) and the detected hot air temperature detected by the hot air temperature sensor (151). Establish a country,
There is an outside temperature sensor (5) on the outside of the lower plate that detects the outside temperature.
) and an outside air humidity sensor (6) that detects the outside air humidity, and a control device (to) and a suction wind stop control device (
This is a configuration that includes (b).

The suction wind stop control device (g) includes each of the sensors (4),
(A-D converts the detection value detected by 51, +61
D converter 60. An input circuit 821 to which the converted value converted by this A-D converter 141) is input, a CPU f-13 that performs arithmetic and logical operations, comparison operations, etc. on various input values input from this input circuit hz, and this CPU &+3. This configuration is provided with an output circuit that receives various commands and outputs them.

The control device (to) includes an A-D converter (g) that converts the detected value detected by the hot air temperature sensor (one) to A-D, and an input to which the converted value of the A-D converter is input. (into the circuit), an input circuit (input circuit) into which the operation of each of the switches (to), (to), (b), country and each of the above settings (to), 嬶 is input, to each of these input circuits), (G) Performs arithmetic and logical operations, comparison operations, etc. on various input values input from
It has a configuration in which a PU (43, this CPU (in an output circuit that receives and outputs various commands issued by the CPU 43) is provided.

The suction air stop control device (G) sets and stores the settings in the CPU (B) based on the detected outside air temperature and the detected outside air humidity detected by the outside air temperature sensor (5) and the outside air humidity sensor (6). The structure is such that the equilibrium moisture content of outside air is calculated using a calculation formula, and the operation of the discharge work start switch (B) is input to the control device (To), and the operation for setting the target moisture is inputted to the control device (To). When the moisture sensor (4) detects the grain moisture value that is input and is the same as the finishing target moisture value of this setting, the suction air stop control device! When input to IC), this grain moisture value at the time of finishing is compared with the calculated equilibrium moisture content obtained by calculation, and if this calculated equilibrium moisture content is greater than or equal to the grain moisture value at the time of finishing, This suction wind stop control device (G) drives the motor (1a) that rotationally drives the exhaust fan (3).
It is configured to stop the suction of outside air that is sucked and discharged by this exhaust fan (3), and the finish target moisture value is the same as the target moisture value set by operating the target moisture setting control. When the moisture sensor (4) detects the grain moisture value, the dryer (7) is automatically stopped, and if the calculated equilibrium moisture content is equal to or higher than the grain moisture value at the time of finishing, the exhaust air is The motor that opens and closes the valve in the chamber and the motor that opens and closes the valve at the front of the burner case are rotated to close these valves and suck and exhaust air with the exhaust fan (3). It may be configured such that outside air cannot be sucked in.

The control device controls each of the starting switches (1) and (2).

When the operation (b) is input, this input causes the motors +17), (+8, I21), (to), and 0υ that rotate each part of the dryer (7) necessary for each task to rotate. The set hot air temperature set by operating the hot air temperature setting trap is compared with the detected hot air temperature detected by the hot air temperature sensor 119, and if they are different, the set hot air temperature is set to be the same. , the fuel pump 03 is configured to control the number of times the fuel valve of the fuel pump 131 is opened and closed to change the amount of fuel sucked by the fuel pump 03.

In addition, when the calculated equilibrium moisture content obtained by the calculation is equal to or higher than the grain moisture value at the time of finishing, the shell side prediction is displayed in the display window (to) as a symbol, etc., and at the same time, an alarm is activated in the operating device (9). It may be configured such that a warning device is provided to issue an alarm, or the outside air humidity detected by the outside air humidity sensor (6) may be displayed on the display M.

The dryer (7) is started and the burner (2
) Hot air is generated from the exhaust fan (3), and the hot air is sucked by the exhaust fan (3), and is then passed through the hot air chamber (141) to the drying room (1), passes through the exhaust chamber (9), and is sucked in by the exhaust fan (3). Exhausted air,
The grains stored in the storage chamber I2δ of the dryer (7) are exposed to this hot air and dried while flowing down from the storage chamber Q3 into the drying chamber (1), and are then sent to the lower part by the delivery valve (13). The grains are fed out and flowed down to be supplied into the collection @ (18), transferred to and discharged into the supply @ (2) by the transfer spiral in the grain collection gutter I3, conveyed to the upper part by the packet conveyor 129, and fed into the dumping tube ( 5)
It is supplied into the transfer gutter (to) through the transfer gutter (Q4), and is transferred and supplied onto the diffusion plate (to) by the transfer spiral in this transfer gutter Q4, where it is evenly diffused and returned into the storage chamber (2). When the moisture sensor (4) detects a grain moisture value that is the same as the finished target moisture value set by operating the target moisture setting control after being circulated and dried, the operation device (9) stops the suction air. Control device 6
Q and the control device (to) automatically control the dryer (7) to automatically stop the dryer (7).

When performing a discharge operation for discharging dried grains to the outside of the machine, the dryer (7) is started by operating the discharge operation start switch (to) of the operating device fi +91.

By opening the discharge shutter in the discharge funnel (1), the grains conveyed to the upper part of the packet conveyor 4 are discharged to the outside of the machine via the discharge funnel (g) and the discharge tube group. However, during this discharge work, the equilibrium moisture content of the outside air is calculated based on the detected outside air temperature and the detected outside air humidity detected by the outside air temperature sensor (5) and the outside air humidity sensor (6), and the calculated equilibrium moisture content obtained by this calculation is calculated. The moisture content is compared with the grain moisture value at the time of finishing, and if this calculated equilibrium moisture content is greater than or equal to the grain moisture value at the time of finishing, the motor (IEI) that rotationally drives the exhaust fan (3) The wind stop control device ■ stops the suction of the outside air that is sucked and exhausted by this exhaust fan (3), and the dried grains are machined without being exposed to the outside air. Discharge outside.

When the dried grains are discharged outside the machine, the outside air sucked and exhausted by the exhaust fan (3) is stopped depending on the calculated equilibrium moisture content of the outside air obtained by calculation and the moisture content of the grains at the time of finishing. By being controlled, the dried grains are not exposed to outside air, so the dried grains do not absorb moisture, and therefore do not deteriorate in quality due to drying. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a flowchart, Fig. 3 is an overall front view of the dryer partially cut away, and Fig. 4 is partially cut away. FIG. 5 is an enlarged front view of a portion of the dryer. In the figure, reference numeral (1) indicates a drying chamber, (2) a burner, (3) an exhaust fan, (4) a moisture sensor, (5) an outside air temperature sensor, and (6) an outside air humidity sensor.

Claims (1)

[Claims] An exhaust fan (3) that sucks and exhausts the hot air generated from the burner (2) and the outside air passing around the burner (2) to the drying chamber (1) where the grains flow down; (1)
A moisture sensor (4) is provided to detect the moisture value of the grains that are circulated to and dried at predetermined time intervals, and an outside air temperature sensor (5) that detects the outside air temperature and an outside air humidity sensor (5) that detects the outside air humidity. (6) is installed, and the equilibrium moisture content of the outside air is calculated based on the outside air temperature detected by this outside air temperature sensor (5) and the outside air humidity detected by this outside air humidity sensor (6), and the dried grains are discharged to the outside of the machine. When performing the discharge work, the hot air generated from the burner (2) is stopped and the outside air passing around the burner (2) is sucked and exhausted by the exhaust fan (3). During discharge work to discharge grains outside the machine, if the calculated equilibrium moisture content of the outside air obtained by calculation is greater than the discharged grain moisture value, the exhaust fan (3) sucks and exhausts the outside air. A grain discharge control system characterized by being equipped with a suction wind stop control device that stops.