JPS60629Y2 - Device to prevent contaminants and grains from sticking in storage tanks for grain dryers - Google Patents

Description

[Detailed description of the invention] The present invention allows contaminants to be deposited at the corners of a rectangular cylindrical storage tank due to the dew point phenomenon, not only when a normal amount of grain is loaded, but also when an odd amount of grain is loaded. This invention relates to a device for preventing contaminants and grains from sticking in a storage tank for a grain dryer, which prevents grains, etc., from sticking to each other and causing uneven flow of grains, thereby ensuring good uniform drying work. .

The grains packed in a rectangular cylindrical storage tank are fed from the storage tank to the ventilation drying barrel at the lower stage, and as the grains flow down the ventilation drying barrel, they are dried by being exposed to hot air, and the temperature of the grains is increased. In the case of a grain dryer, in which the grains with increased drying temperature are circulated back to the storage tank via the take-out tank and the same drying operation as described above is repeated, the grains stored in the storage tank are exposed to hot air to dry the grains. The temperature has been raised to approximately 35°C to 40°C.

If the grains are temporarily left in the storage tank at the above-mentioned grain temperature, a portion of the water that has migrated from the inside of the grains to the surface will evaporate due to the moisture diffusion movement, and the dew point will be lowered due to the temperature difference with the outside temperature. It is well known that a dew point phenomenon occurs in which many water droplets are generated on the inner wall side of the storage tank, especially at the corners.

In addition, many impurities are mixed into grains, and because these impurities are lightweight, they flow down on the grain layer during circulation drying and become concentrated in the corners of the storage tank. be.

As a result, the foreign matter that has fallen into the corner sticks to the inner wall of the corner due to the water droplets generated due to the dew point phenomenon and the pressure of the filling grains, preventing it from flowing down. Due to the above-mentioned action, the parts also stick together and the flow is obstructed.

Therefore, in a dryer with a rectangular cylindrical storage tank, it is important to eliminate the corners as much as possible and to eliminate the occurrence of dew points at the corner positions so that the grains remain level during the drying process. Even though it is very important to uniformly flow down the ventilation drying cylinder and to expose all the grains to uniform drying hot air for uniform drying, there is no solution to this problem.

In view of the above, the present invention forms a hot air passage by vertically installing a sticking prevention plate having an upper opening and a lower porous surface at the corner of a storage tank having a rectangular cylindrical shape. In addition to communicating with the exhaust frame installed vertically in the ventilation drying cylinder installed in the lower layer, the sticking prevention plate is equipped with an adjusting plate that can be moved up and down to adjust the exposed area of the lower porous surface to be wide or narrow. The hot air evaporated from the stored grains is drawn into the hot air passage by suction from the exhaust frame side, where the temperature of the grains is raised by blowing dry hot air near the corners of the storage tank. After being forcibly sucked in, the hot air is exhausted to the outside through the exhaust frame, and the formation of the hot air passage and the heat insulating effect of the circulating hot air eliminate the temperature difference with the outside temperature and prevent the occurrence of dew point phenomenon at the corner position. It reliably eliminates contaminants and grains to prevent them from sticking, completely eliminating uneven drying due to uneven grain flow, and also prevents dew point generation when drying fractional grains smaller than the specified amount in the same way as described above. However, it is an object of the present invention to provide a device for preventing contaminants and grains from sticking in a storage tank for a grain dryer, which is capable of remotely achieving an effective uniform drying operation.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the apparatus of the present invention will be described below with reference to a preferred embodiment shown in the accompanying drawings.

Reference numeral 1 denotes a dryer main body having a rectangular tube shape as a whole, and inside the dryer main body 1, a storage tank 2, a ventilation drying cylinder 3, and a take-out tank 4 are stacked three-dimensionally in order from the upper stage to the lower stage. It's important.

The storage tank 2 and the ventilation drying cylinder 3 communicate with each other internally, and inside the ventilation drying cylinder 3 there is a fumarole frame 5 that blows dry hot air.
and an exhaust frame 6 for exhausting the waste hot air are vertically arranged alternately through a paddy flow path 7.

The lower part of the exhaust frame 6 communicates with the lowermost take-out tank 4, and a rotatable pay-out roll 8 is mounted on an axis at the end of the paddy flow path 7.

The carry-out gutter 9 provided at the bottom of the take-out tank 4 and the carry-in gutter 10 installed horizontally at the top of the storage tank 2 are connected by a circulation elevator 11. Transfer screws 12 and 13 are mounted on storage shafts.

A suction exhaust fan 14 is attached to the back side of the takeout tank 4 formed as described above, and the hot air supply starting end side of the blower frame 5 is connected to a hot air generator 15.

Then, a sticking prevention plate 16 is attached to each corner position of the storage tank 2 having a rectangular cylindrical shape. A hot air passage 17 having a substantially rectangular cross section is provided vertically.

The upper part of the hot air passage 17 is sealed, and the lower part communicates with the exhaust frame 6 through a communication passage 18.

In the embodiment of the present invention, the exhaust frame 6 and the take-out tank 4 are communicated with each other, and a suction exhaust fan 14 is installed on the back side of the take-out tank 4. 6 is independent without communicating with the take-out tank 4,
This may be a grain dryer equipped with a suction exhaust fan 14 so as to communicate with the exhaust frame 6.

Reference numeral 19 denotes an adjustment plate mounted on the surface of the above-mentioned sticking prevention plate 16 so that it can be moved up and down.
9 is vertically provided with a long hole 21 into which a fixed tensioning tool 20 is inserted;
When the adjustment plate 19 is raised along the fixed tensioning device 20, the exposed area of the lower porous surface 16a is widened to make it suitable for drying a specified amount of grain, and the adjustment plate 19 is raised along the fixed tensioning device 20.
When lowered along the lower porous surface 16b, the exposed area of the lower porous surface 16b is reduced, making it suitable for fractional drying work.

Next, the operation of the present invention will be explained.

Now, if the adjustment plate 19 is raised so that the lower porous surface 16b is completely exposed and fixed with the fixing tension tool 20, the elevator 11
Even if a specified amount of grain is filled into the storage tank 2 through the carry-in gutter 10, the lower porous surface 16b remains blocked by the grain.

When a specified amount of grain is filled in this way, the supply is stopped and the feed roll 8, suction/exhaust fan 14, hot air generator 15, and other operating members are started.

Then, the grains flowing sequentially from the storage tank 2 through the paddy flow path 7 are exposed to dry hot air in the process of exiting from the fumarole frame 5 and entering the exhaust frame 6, being somewhat dried, and then discharged into the take-out tank 4 and carried out. The water is circulated back into the storage tank 2 through the gutter 9, the elevator 11, and the carry-in gutter 10, and is again subjected to the same drying action as described above to be dried to the desired moisture content by a plurality of circulation actions.

By the way, if the grains are left in the storage tank 2 for a period of time when the grain temperature has been raised to approximately 35°C to 40°C by being exposed to dry hot air, some of the moisture that has migrated from the inside to the surface will be absorbed. is naturally evaporated, and the evaporated hot air has a dew point due to the temperature difference with the outside air temperature, and water droplets tend to be generated on the inner wall side of the storage tank 2, particularly at the corner positions.

However, during drying work, the suction exhaust fan 14
Due to the suction action, the inside of the exhaust frame 6 as well as the inside of the hot air passage 17 is in a negative pressure state, so the hot air naturally evaporated from the grains near the corner quickly flows through the lower porous holes due to the suction action. After being introduced into the hot air passage 17 from the surface 16b, the hot air passes through the exhaust frame 6 and the take-out tank 4, and is collectively exhausted to the outside of the machine by the suction exhaust fan 14 together with the subsequent dust exhaust air used for drying.

As a result, hot air is sucked and distributed toward the exhaust frame 6 in the hot air passage 17 provided in the corner position where the dew point is most likely to be established in the storage tank 2, and this area becomes a heat insulating layer. Since the occurrence of the dew point phenomenon is eliminated, foreign matter and grains that have fallen into the corners are smoothly flowed down along the sticking prevention plate 16 without sticking.

Therefore, even if you repeat the circulation of grains many times, the storage tank 2
The grains housed in the container are flowed down in a substantially even manner without causing uneven flow, and are evenly dried by being exposed to uniform hot air.

Also, when attempting to dry less than the specified amount of grain due to drying work conditions, the adjusting plate 19 can be adjusted downward until the lower porous surface 16b is covered with the supplied grain, and this can be done in the case of fractional grains. Even if there is, the drying work can be carried out without causing uneven flow.

In short, since the present invention has the above-mentioned configuration, even if natural evaporation occurs while grains with a high grain temperature are stored in the storage tank 2 during drying operation,
The evaporated hot air is sucked into the hot air passage 17 provided at the corner position through the lower porous surface 16b, and is quickly exhausted to the outside through the exhaust frame 6, forming a rectangular cylindrical shape. It quickly eliminates the dew point phenomenon that is most likely to occur at the corners of the storage tank 2, and prevents foreign objects, grains, etc. from sticking to the surface and causing uneven flow, and also prevents the sticking prevention plate 16 from vertically moving. The exposure of the lower porous surface 16b may be due to the fact that the corners are eliminated by the design, and the entire grain is allowed to flow down in a substantially level state, thereby making it possible to accurately dry the grain uniformly. Since the area can be easily widened or narrowed by the adjusting plate 19 which can be adjusted up and down, the simple adjustment of the up and down movement of the adjusting plate 19 can be used not only for drying a specified amount of grain but also for drying fractional grains without causing uneven flow. It has the effect of being able to be carried out effectively without any problems.

[Brief explanation of the drawing]

The drawings show one embodiment of the device of the present invention, and the first
2 is a longitudinal sectional plan view, FIG. 2 is a longitudinal sectional front view taken along the line A--A in FIG. 1...Dryer body, 2...Storage tank, 3
... Ventilation drying cylinder, 6 ... Exhaust frame, 16
... Sticking prevention plate, 16a ... Upper beginning, 16b ... Lower porous surface 17 ... Hot air passage, 19 ... Adjustment plate .

Claims (1)

[Scope of utility model registration request] A hot air passage is formed by vertically installing an anti-stick plate having an upper opening and a lower porous surface at the corner of the rectangular cylindrical storage tank. For use in a grain dryer, which communicates with an exhaust frame installed vertically in the body, and is equipped with an adjustment plate that can be moved up and down to adjust the sticking prevention plate to freely adjust the exposed area of the lower porous surface to be wide or narrow. Device to prevent contaminants and grains from sticking to storage tanks.