JPS5953464B2 - Automatic hot air temperature control device for grain dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an automatic hot air temperature control device for a grain dryer, and a plurality of injection nozzles are provided in the heat generator of the grain dryer to prevent sudden fluctuations during the day and night that occur in cold regions. In addition to automatically increasing or decreasing the amount of fuel liquid injected immediately in response to atmospheric temperature changes, a cylindrical cage with porous walls of different diameters is installed in the combustion chamber to reduce carbon monoxide generated in the combustion chamber. The purpose of the present invention is to develop and provide a new, high-performance drying device that completely decomposes and burns unburned particles and automatically regulates the hot air and grain temperature within an appropriate range at all times.

To explain the embodiment of the present invention with reference to illustrative drawings, reference numeral 1 in the drawing includes a hot air chamber 2, a grain flow path 3.3, and an exhaust air chamber 4.
. This is a three-dimensional circulating grain dryer.

Next, the fire heat generator 6 will be explained in detail with reference to FIG.
A plurality of injection nozzles lla, llb are fitted and arranged approximately parallel to the axial direction in the front half of a cylindrical outlet 10 connected to the blower 9, and a spark plug 12 is protruded from the vicinity thereof. A combustion chamber 17 is provided on the discharge side 13 of the combustion chamber 10, in which a plurality of porous-wall cylinder crown-shaped cages 14 and 15 of different diameters are superimposed substantially concentrically with an appropriate gap 16 in between, and the front side wall of the combustion chamber 17 is A shield plate 18 is installed on the rear side wall, and a swirl wall 19 is installed on the rear side wall, and these machine parts 9, 10, and 17 are integrally formed.

Incidentally, reference numeral 20 denotes an oil supply pipe for supplying oil to each of the nozzles 11a and llb, and electromagnetic valves 21a and 21b each having an on-off valve are installed in the container pipes 20 and 20, and the electric wire of the plug 12 is connected to the oil supply pipe 20. A transformer 22 is installed.

Note that each of the injection nozzles lla and llb has a diameter of 1
Although the openings are opened at a ratio of 2:2, the number and the old diameter ratio are arbitrary and are not limited in any way.

Next, a temperature switch 2 attached to the body 1a of the dryer
3 with respect to the circuit diagram in FIG. 4, the power terminals R,
Atmospheric temperature arbitrarily determined during S (25℃) (15℃)
(automatic return type thermostats that operate at 5°C) 23a, 23b.

23C is arranged in parallel with the relays R1, R2, R3, and the a contact R1 of the electromagnetic valve 21a thermostat 23a and the thermostat 23 are interposed in the oil supply pipe 20.
b and b contact R2 are connected in series, and both contacts R1, R2
A contact R3 circuit of a thermostat 23C is added to the outside of the , and a solenoid valve 2 interposed in the oil supply pipe 20 is added.
The a contact of the thermostat 23b is connected in series to the thermostat 23b.

In addition, the atmospheric temperature setting value for this device (5℃ to 25℃)
may be changed arbitrarily depending on each region, such as a cold region or a warm region, and the drying hot air may be set at an arbitrary set temperature between 40°C and 60°C depending on the amount of raw grain in the grain tank 7.
50° C.), and the injection nozzles lla and llb are fully opened and combusted in the lowest atmospheric temperature state (5° C.) to maintain the arbitrary set temperature (50° C.) on average. be.

Since the present invention is configured as described above, raw grain is fried in the upper grain tank 7, and any injection nozzle ll of the heat generator 6 is used.
When the device is driven by opening the igniter A to generate hot air in the hot air chamber 2, the grains in the grain tank 7 flow down and accumulate in each of the grain channels 3, 3, and the grains formed in the chamber 3 The hot air traverses the tank from the hot air chamber 2 to the exhaust chambers 4, 4 and performs a drying action, and the dried grains are returned to the upper grain tank 7 via the lifting mechanism 8, where the so-called circulation type tempering drying is carried out. This will be continued.

Generally, grains have a high moisture content at the time of harvest, with a moisture content of 10 to 30%.
Because tempering drying is carried out over a long period of time, the temperature of the supplied air (8 curves) changes by 5 to 15 degrees Celsius between day and night, as shown in Figure 3, and the hot air for drying is
When setting the temperature to 0℃ (A line), PM13 in the figure
At this time, the atmospheric temperature is 25°C, so the thermostat 23a is activated, the contact R1 is closed, the small-diameter injection nozzle lla is opened and heated, and then at 19 PM, the thermostat 23b is activated. Small diameter injection nozzle
The contact R2 of la is opened, and the contact R2 of the large-diameter injection nozzle 11b is closed for combustion. Next, at 3 AM, the thermostat t-23C is activated and the contact R3 is closed, and each injection nozzle 11a, 11b is activated. Both burn through open injection, maintain a predetermined temperature (50°C) on average throughout the day and night, and carry out a drying effect with the hot air.

Therefore, to explain the combustion situation of the fire heat generator 6, the combustion of the fuel atomized particles in the combustion chamber inner cage 14 tends to cause incomplete combustion as the opening degree of the injection nozzle 11 increases. The combustion gas includes carbon monoxide, unburned particles, tar particles, etc., and these are contained in both the cages 14,
The carbon monoxide and unburned oil particles are heated when they pass in contact with the porous wall vents of each of the cages 14 and 15, which flow out to the outside through the vent holes 15 and become red hot in the form of solid combustion. They are then decomposed and burned.

Moreover, since the cages are formed in multiple layers, the decomposition and combustion is carried out on each porous wall surface of each cage, resulting in good combustion and complete combustion, which has the effect of increasing the thermal power and increasing the combustion efficiency.

Although the opening/closing valve of the oil pipe provided in the injection nozzle is an electromagnetic valve in the embodiment, it may also be an electromagnetic pump, a solenoid valve, or the like.

In short, the present invention provides a drying apparatus in which a grain flow path, a hot air chamber, and an exhaust chamber are arranged in parallel, and is equipped with a fire heat generator and an air exhaust fan, in which oil supply pipes of a plurality of injection nozzles provided in the fire heat generator are respectively connected to each other. An on-off valve is provided, and the on-off valve is electrically connected to a plurality of temperature switches attached to the dryer body that are activated according to temperature changes, and each of the above-mentioned Since the configuration is configured such that the hot air in the hot air chamber is maintained at a predetermined temperature by individually switching on/off valves of the injection nozzles to increase or decrease the number of combustion injection nozzles, it is not possible to adjust the temperature of the hot air like in conventional devices. There is no need for complicated work or operations such as replacing each injection nozzle with a larger or smaller diameter or adjusting the compressed air, and the hot air and grain temperature are automatically regulated within the appropriate range at all times, preventing temperature adjustment defects. It is possible to completely prevent quality defects such as frequent cracking of grains, heat-damaged grains, and deterioration of taste caused by drying.It also makes the drying process extremely smooth and prevents fires caused by overheating. Since control and management are carried out accurately and automatically, excellent dry grains can always be expected, resulting in remarkable effects.

[Brief explanation of drawings]

The drawings illustrate embodiments of the present invention; FIG. 1 is a partially cutaway side view of the device, FIG. 2 is a sectional view of the fire heat generator, and FIG. 3 is an explanation showing the relationship between air temperature and hot air temperature. Figure 4 is an electrical circuit diagram. 1...Drying section body, 1a...Dryer body, 2...Hot air chamber, 3...Grain channel, 4...・Exhaust room, 5...Exhaust fan, 6.
...Fire heat generator, 7...Grain tank, 8...
...Elevator, 9...Blower, 10...
...Blower mouth, 11a...Injection nozzle, 11b...
... Injection nozzle, 12 ... Spark plug, 1
3...Discharge side of the blowing mouth 10, 14...Cage body, 15...Cage body, 16...Gap, 1
7... Combustion chamber, 18... Shielding plate, 19
...Swirl wall, 20...Refueling pipe, 2
1a...Solenoid valve, 21b...Solenoid valve, 22...Transformer, 23...
Temperature switch, 23a, 23b, 23C...Thermostat, R1, R2, R3...Relay contact, A...Set temperature, B...Atmospheric temperature curve .

Claims (1)

[Claims] 1 A grain flow path, hot air chamber, and exhaust chamber are installed in parallel, and a heat generator and
In a drying device equipped with an air exhaust fan, an on-off valve is provided in each of the oil supply pipes of a plurality of injection nozzles provided in the fire heat generator, and a plurality of temperature control valves are installed in the on-off valve and the drying machine body in response to changes in temperature. electrically connect the switch,
The hot air in the hot air chamber is maintained at a predetermined temperature by individually switching on/off valves of each injection nozzle to increase or decrease the number of combustion injection nozzles in response to changes in the temperature of the air supplied to the fire heat generator. Automatic hot air temperature control device for grain dryers.