JPS59195086A - Hot air discharger for 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: When drying grain by exposing it to hot air from a burner, when the outside temperature is high, the amount of fuel in the burner is reduced compared to when it is low, reducing the calorific value of the burner, that is, the temperature at which the outside air is heated by the burner. If this is not done, the grain temperature will become too high and the grain will become overly dry, resulting in cracking of the grain.

However, when drying a small amount of grain in a large-capacity grain dryer, the fuel in the burner is initially squeezed and burned, so reducing the fuel even more will reduce the burner's fuel consumption.
[The fuel cannot be reduced below the rated flow rate of the burner, as this may cause a failure, and in such a case, if the outside temperature becomes high, an overdry state cannot be avoided.

The present invention solves this inconvenience. Even if the rated flow section and the minimum value of the range are used to burn the henna, the hot air temperature still exceeds the set value (Ii) due to the high outside air temperature. The purpose of LI is to prevent the grain temperature from becoming too high by letting it escape.

The present invention will be explained based on the embodiments shown in the drawings.
1 is the storage chamber of the dryer, with a cut in the center of the bottom [rll is an inverted V]
A letter-shaped chevron plate 2 is provided, and guiding swash plates 3 are provided opposite to the left and right sides of the chevron plate 2.
．． Install 3. Perforated plates 4 are connected to both side edges of the chevron plate 2 and the lower edge of the guiding swash plate 3.3, and the two opposing plates 1
A drying chamber 5.5 is formed by a set of perforated plates 4.

The discharge port at one end of the dry cooking chamber 5.5 looks into the gutter-like grain collection chamber 7 through the rotary hull processor, and the delivery end of the grain helix 8 suspended horizontally in the groove in the center is connected to the yI grain collection chamber 7. Machine 9's 1.'' part intake 1
”. Reference numeral 10 indicates a loading port that communicates with the intake section 1 of the Y1 grain machine 9.

A grain feeding helix 1.1- is connected to the upper part of the grain raising machine 9.

Diffusion plate 1 whose end is suspended from the center of the ceiling plate of storage chamber 1
It opens above 2.

Then, burners 13 and suction fans 14 are installed facing each other on the front and 1 m back of the dryer, and the burners 13 are installed in the drying chambers 5 on the left and right.
．． 5 and look into the hot air chamber 15 inside the fan I.
4 is the outside of the drying chamber 5.5, and is a shielding plate that partitions the hot air chamber 15 and the exhaust chamber 16.

The grains are evenly stacked into the storage chamber l through the loading port 10 through the Y1 grain machine 9 and the grain feeding helix 11 by the diffusion plate 12.
It flows down the drying chamber 5. At this time, the hot air from the burner 13 enters the left and right drying chambers 5 from the central hot air chamber 15 and dries the grains flowing down. At θ1, the dried grain falls into the grain collection chamber 7 by the rotation of the rotary valve 6, returns to the storage chamber 1 again by the grain removal screw 8 and the grain elevator 9, and repeats this process.

However, in the present invention, the shielding plate 17 facing the front of the fan 14 is
A hot air outlet 18 is opened at the opening, and a regulating valve 1 that can be opened and closed is attached to the hot air outlet 18.
9 (=J). 20 is a rotational support shaft of the regulating valve 19, which is connected to the body weight along the upper side of the regulating valve 19, and its both ends are rotatably attached to the plate surface of the shielding plate 17. (=Jke, one end of the rotation support +8I20 is tilted and bent downward, and the tip of the operating rod 22 of the solenoid 1ζ21 which is connected to the plate surface of the shielding plate 17 at 1A-1 is brought into contact with the bent part.

Next, set the hot air temperature setting circuit 23 to the appropriate outside air temperature meter 11 circuit 2.
4, and its output side is connected to the input terminal of a comparator 26 to the outside air temperature sensor 25 and Connect the fuel wave adjustment goss 28.

Reference numeral 29 denotes a hot air temperature correction circuit, to which the outside air temperature sensor 25 and the lJ intensifier 27 are connected to the input side, and to the hot air temperature setting circuit 23 at the output side.

Then, when the set temperature Ta of the hot air is determined according to the amount of grain to be dried and set by the setting circuit 23, the appropriate outside air temperature calculation circuit 24 calculates the set temperature Ta of the hot air and the lower heating limit temperature t of the burner 13 according to the following equation. Calculate the appropriate outside temperature Tb.

Tb = Ta - t (equation 1) Here, the lower heating limit temperature t is the temperature at which the burner is heated when the supply flow rate of fuel to the burner is set to the minimum value within the rated flow range of fuel that can be normally combusted by the burner. It is the temperature at which outside air is warmed by heating, and the (+G) is determined by the type of burner used.

Then, the comparator 26 compares the appropriate outside air temperature Tb and the outside temperature Tc actually measured by the outside air temperature sensor 25, and if the value of the appropriate outside air temperature Tb is the same as or smaller than the outside air temperature Tc (Tb≦Tc ) outputs an activation signal from the comparator 26 to excite the solenoid 21 /a L operation +122 is pushed out.As a result, the rotation support shaft 120 rotates and the adjustment valve 1
9 is opened, and a portion of the hot air from the burner 13 passes directly from the hot air chamber 15 through the discharge port 18 without passing through the drying chamber 16 and is discharged to the outside of the machine.

At the same time, the comparator 26 is activated, which is the fuel flow starting point 2.
8 and restricts the flow of fuel supplied to the burner 13 to the minimum 1G of the rated flow range.

In addition, the hot air temperature correction circuit 29
is activated, and the set temperature of the hot air in the hot air temperature transfer setting ji41 path 23 is corrected from Ta to Tc+t.

For example, when drying a dryer with a drying capacity of 8 stones to 24 stones and a burner minimum heating temperature t of 10°C with a minimum of 8 stones of h4, the set temperature Ta of the hot air is 34°C.
C to outside air 11. If the temperature Tc is 28°C, the appropriate outside air temperature Tb is 24°C from equation (1), and the outside air temperature Tc =
Since the temperature is smaller than 28 DEG C., the comparator 26 outputs an activation signal, opens the adjustment valve fl 9, and throttles the fuel 1 of 7<- to the minimum flow rate. Then, the hot air temperature correction circuit 29 corrects the hot air temperature setting Ta=34°C in the hot air temperature setting circuit 23 to Ta=Tc+t=28'C+lO'G=386G.

As a result of the correction, the output Tb of the appropriate outside air temperature calculation circuit 24
is equal to the actual outside air temperature Tc = 28°C according to (Equation 1), but the comparator 26 continues to output an operating signal and adjust f? 19 remains in the open position, and the burner continues to burn normally with the minimum flow rate of fuel.

Instead of manually opening and closing the regulating valve 19 in this way, a temperature indicator is connected to the outside air temperature sensor 25 to check the outside air temperature Tc.
is read, and the difference between that value and the hot air set temperature 1 odor Ta is as follows: Ta-Tc≦t (2 formulas) If the value of the lower heating limit temperature E of the burner is below, that is, /゛・-su heating door When the limit temperature E exceeds the difference between the hot air set temperature Ta and the outside air temperature Tc, manually close the switch of the solenoid 21, open the adjustment 3119, and select 11! Even if the fuel IAe elevation control valve 28 is throttled down to the minimum value at f, and the hot air temperature is changed from Ta to Tc+t by -1-yl by manually operating the setting guide (for example, a button meter) of the hot air temperature setting circuit 23. good.

Note that instead of the solenoid 21, a II reverse motor may be used to open and close the regulating valve 19.

To avoid this problem, in the present invention, a hot air discharge unit 1 is installed on a shielding plate 17 that cuts a gap between the hot air chamber 15 and the newspaper chamber 16 of the grain dryer.
18 is opened 1, and there are several regulating valves 19 that can be opened and closed, so even if the outside temperature is high and the fuel in the burner 13 is reduced to the minimum value within the rated flow range, the lower heating limit temperature of the burner 13 will be maintained. When t exceeds the difference between the set temperature Ta of the hot air and the outside temperature Tc, by opening the regulating valve 19, a portion of the hot air is directly discharged from the outlet 18 without passing through the drying chamber 16. This eliminates the need to reduce the heating temperature below the limit temperature by throttling the fuel in burner 13, prevents the burner from burning normally, and prevents excessive grain temperature, and even when the outside air temperature is high, This produces the effect that drying can be completed into grains of good quality without cracks.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view of the entire grain dryer embodying the present invention, shown on line II-H in Figure 1 (7) of '52. A cross q
FIG. 3 is an enlarged perspective view of the main part thereof, and FIG. 4 is a block diagram of its control system. 13 is a burner, 14 is a suction fan, 15 is a hot air chamber, 16
1 is an air exhaust chamber, 17 is a shielding plate, 18 is a hot air outlet, 19 is a regulating valve, and 21 is a solenoid. Agent Tetsube Maki (and 2 others) Figure 1 Figure 2U4 7471 Figure 3 Figure 4

Claims (1)

[Claims] This hot air discharging device for a grain dryer consists of one hot air discharging unit that has an adjustment Jr. that can be opened and closed freely on a shielding plate that partitions between a hot air chamber and a ventilation chamber of the grain dryer.