JPS61116280A - 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 Field of Application) This invention relates to drying grains such as paddy and wheat, and particularly to drying grains that are configured to suspend the drying operation for a predetermined period of time during the drying operation speed. Regarding grain dryers.

(Prior Art) Some dryers of this kind have a constant downtime.

(Problems to be Solved by the Invention) However, with the above-described structure, the drying loss rate may cause insufficient heat refining, or the downtime may become longer, resulting in a longer drying operation completion time. be.

(Means for Solving the Problem) The present invention aims to solve the above technical problem, and has taken the following technical means.

That is, the grain moisture changes from the initial moisture value (M0) to the resting moisture value (
When the temperature decreases to M1), hot air drying is stopped and the rest time (M1) is reached.
A grain dryer configured to restart the hot air drying operation after 1) has elapsed, comprising a calculation means for calculating the initial moisture [drying loss rate from (M0) to the rest moisture value @), the calculation means The rest time (T
) was configured to be changeable.

(Function) When the grain moisture reaches a predetermined resting moisture value, the initial moisture value (M0), the resting moisture value (M1), and the drying loss rate α) from the drying time from the initial moisture value to the resting moisture value is calculated by the calculation means. After that, hot air drying is stopped for a rest time (T') corresponding to this drying loss rate, and this body +
After h time ('V) has elapsed, the drying operation is performed again.

(Effect) Since the downtime (T) is determined in accordance with the drying loss rate, there is no possibility of deterioration in quality due to cracking of the shell due to insufficient tempering. Further, the drying operation time is not increased and the subsequent drying operation is not hindered.

(Example) Hereinafter, an example of the present invention will be specifically described based on the drawings.

First, to explain its configuration, in FIGS. 1 and 2, a grain storage chamber (2) is provided in the upper part of the dryer (1), and a pair of left and right drying chambers ( 3) are connected to each other, and at the lower end of each drying chamber (3) there is a dispensing pulp (4) which is rotated at a constant low speed.
is constructed so that grains from the drying room (3) are sent out little by little to the collection room (5) at the bottom. The left and right side walls of both drying chambers (3) are each made of a mesh or a perforated plate, allowing the drying chamber (3) to be ventilated from side to side.

In addition, the hollow chamber formed between the left and right drying chambers (3) is configured as a hot air chamber, and is configured to uniformly dry the grains with drying air from a burner (6) and a fan (7). ing. In addition, a screw conveyor (8) is installed in the lower part of the collection chamber (5) facing forward and backward, and after once transferring the dried grain to the rear, it is transferred to the lifting/grain device (9).
), and then sent to the upper center of the grain storage chamber (2) by a transverse conveyor αq, and then diffused and discharged via a diffuser αυ.

A control box (2) and an automatic moisture meter α4 are arranged side by side on the outer wall of the machine at a position above the burner (6). The control box (2) also has a digital display section α that can digitally display the hot air temperature and the grain moisture value detected by the automatic moisture meter α1, and a dryer that can drive the dryer (1). Operation switch 09 group such as switch a5 and stop switch aQ that can stop the drive, grain type switch Ql19 that can select the type of grain such as wheat or paddy, and the loading amount for inputting the loading amount of grain to be dried. Switch 09 and a timer (desired drying time input means) for inputting the desired drying time (T) c! Q and the target water σ value (for example, 13.5%
) (ML) is provided.

Next, to explain the block circuit of FIG. 3, the arithmetic and control unit (hereinafter referred to as CPU) handles the drying curve and resting moisture (a (M
(l) and drying rate (f))) (memory (not shown) for storing necessary data such as swords, and input/output ports (c) and output ports) (very) police officer (
5) and performs arithmetic and logical operations and comparison operations. Then, the CPU via the input port 123 (c)
(b) Information taken in includes output information from the digital input circuit and A/D conversion circuit, and
The drive command signal from U (A) is sent to the dental output circuit (7) via the output port (A), to the drive circuit (7) via the output port (E), and to the drive circuit (7) via the output port (A). It is output to the display section α(1). As information input to the dental input circuit (c), the drying switch 09
The operation information output from the operation switch αη consisting of a stop switch 1 and 10, the amount information outputted from the amount switch α9, the type information outputted from the grain type switch α, and the timer control. The desired drying time (T') information outputted from the input device, the safety information outputted from various safety sensors 01) such as the sensor that detects grain clogging and the sensor that detects abnormal overheating, and the set moisture switch I2 ( There is target moisture information output from In addition, as information input to the A/D conversion circuit 4, the outside air temperature information output from the outside air temperature sensor (2), the hot air temperature information output from the hot air temperature sensor (b), and the grain temperature are detected. The grain temperature information output from the grain temperature sensor (to) and the automatic moisture meter α
] There is detected grain moisture information etc. output from.

Next, the drive command signal is sent via the digital output circuit (1) to the electromagnetic pump (7), which keeps the pressure on the discharge side constant through the action of the relief pulp, and to the ignition that ignites the mixed gas in the burner (6). A heater (9), a suction fan motor (g) that drives the suction fan (7), an elevator motor (to) that drives the grain lifting device (9), and a rotary pulp that drives the rotary pulp (4). It is output to a motor, etc. Also, via the drive circuit (7), the open time (on time) is changed to correspond to the hot air temperature calculated from the above-mentioned loading amount information, grain type information, and outside air temperature information. At the same time, a drive command signal is output to the electromagnetic pulp 0υ that can control the fuel supply amount (combustion amount) of the burner (6), and the primary air combustion fan motor A drive command signal is output to the primary air combustion fan (the primary air control circuit) so that the primary air combustion fan reaches a preset rotation speed based on the on-time of the electromagnetic pulp drive signal. ).In addition, although the automatic moisture meter αTen is not shown in the figure, it is configured to be controlled by the CP every few minutes.
It is configured to receive a drive command signal from U (a) and obtain grain moisture data.

The CPU (22) has the following functions: ■ Sets the resting moisture value (M1) corresponding to the initial moisture value (M0) of the grain (for example, when MQ≧22%, M1=20%, M
When O<22%, M1=MO-2). ■.

The drying time (T') from the start of drying to the body+h moisture value (M1) is calculated. ■, Calculate the drying loss rate (CI) (Drying loss rate (Me) %/Hr = (Initial moisture value (M0) integral moisture retention value y1)) / Resting moisture value (M1) from the start of drying
time (T)). (2) When the rest time (T) has elapsed, a drive command signal is output to the combustion system, grain circulation system, and air flow system of the dryer. ■Determine the downtime based on the calculated drying rate. (2) After re-drying, a drive command signal is output to the combustion system and air volume system to dry at a predetermined drying rate (for example, drying loss rate α>=O,S>).

Next, the control action will be explained based on the time chart of FIG. 5 and the flow chart of FIG. 4.

First, the operator sets the loading amount switch α to the scale corresponding to the amount of grain loaded into the machine, and then sets the grain type switch (to). Then, these grain amount information, grain type information, and outside temperature information are taken into the CPUfi from each input port (E) through a digital input circuit or an A/D conversion circuit valve, and the hot air temperature is calculated. Then, the operator sets the desired drying time (T) on the timer (a).

Next, the operator sets the target moisture value (M1) with the setting moisture switch (21), and then turns the drying bush button switch α9 "ON". Then, this operation information is sent to the digital input circuit via the input port (C).
Since it is imported to PU@, CPU@ is the output port (a)
・Electromagnetic pump (7) via digital output circuit (to)
, the ignition heater (G), the carburetor motor (not shown) of the burner (6), the suction fan motor (G), the elevator motor (G), and the pulp motor 00 are sequentially driven by outputting a drive N command signal. . After a few minutes, an on-time drive command signal corresponding to the hot air temperature recorded in mJ is output from the CPU (A) to the electromagnetic pulp 02 via the output port (A) and the drive circuit (7). A drive command related to the on-time signal of the pulp q-function is outputted to the primary air control circuit to drive the primary air combustion fan motor (not shown) to rotate the primary air combustion fan (not shown). The primary combustion air supplied by this fan and the vaporized gas supplied through the pulp (6) and vaporized in the vaporization tube (not shown) are mixed to form a mixed gas, and then ignited. It is ignited and burned by the heater. Then, the outside air sucked into the burner box by the suction fan (6) is heated by the combustion flame and becomes hot air, which is sent into the hot air chamber to dry the grains. At the beginning of such drying work, the CPU (a) first sets the drying time counter to 0 (step 510), and then converts the moisture data detected by the automatic moisture meter 03 into the A/D conversion circuit. The moisture value (MS) taken in through the valve power port (
Note that this first moisture value is set as the initial moisture value (M0), and resting moisture 1iil (Ml) is calculated (step 520). Next, 1 is added to the counter (
The moisture measurement time is determined from step 530) (step 540), and if the measurement time has come, the automatic moisture meter [alpha] detects grain moisture data (step 550). Then, the detected moisture value (MS) and the resting moisture value (M1) are compared (step 560), and if it is determined that the detected moisture value (MS) is smaller than or equal to the resting moisture value (Ml), the drying is reduced. The rate (force) is calculated (step 570). Next, the CPU (a) calculates the rest time (sword) corresponding to this drying rate (for example, if 1,4 = 1.5, it is 122 hours). , if recognition = 1°2, then T = 1.0 hours; however, T for ■ is not limited to this only)
(Step 580) Each body drive part of the grain dryer (1) (
A drive stop command signal is output to the combustion system, grain circulation system, air volume system, etc.) to stop the drive (step 590). after that,
When it is determined that the rest time has expired (step s too >), the CPU (a) outputs a drive command signal according to the sequence of the time chart shown in Fig. 5 to drive each rotating part of the aircraft and remove the rest water. It!
(Ml) to the target moisture value (ML) at a preset drying loss rate (for example, beauty = 0.8). Therefore, depending on the drying rate, the downtime (T
′) is also changed, so grains of good quality can be obtained without over- or under-tempering.

In addition, in this embodiment, the rest time corresponding to the drying loss rate is set in advance, but the time to start re-drying is determined, and the difference time between this time and the time to reach the rest moisture value (M1) is determined. may be used as the downtime.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a front view of a grain dryer, Fig. 2 is a partially cutaway side view thereof, Fig. 3 is a block circuit, and Fig. 4 is a flowchart. FIG. 5 is a time chart, and FIG. 6 is a diagram showing a drying curve. (M0) is the initial moisture value, (M1) is the resting moisture value, (a)
is the drying rate, and (T') is the rest time.

Claims (1)

[Claims] The grain moisture changes from the initial moisture value (M_0) to the resting moisture value (M_
When it decreases to 1), hot air drying is stopped and the rest time (M_
The grain dryer is configured to restart the hot air drying operation after 1) has passed, and is equipped with a calculation means for calculating the drying loss rate (α) from the initial moisture value (M_0) to the rest moisture value. A grain dryer configured such that a downtime (T) can be changed according to a drying rate (α) calculated by a means.