JPH01174882A - Drying method for grains - Google Patents

Abstract

PURPOSE:To eliminate irregularities in flowing and drying, and to obtain dry grains of uniform and high quality by so controlling the circulating speed of the grains as to become faster than that at the time of normal drying while predetermined conditions are satisfied after a drying operation is started. CONSTITUTION:Feeding rolls 9 are so rotated as to accelerate the rotating speeds of the rolls 9 to circulate to feed grains of, for example, 4.6tons per one hour in a drier 1 when the fact that high-aqueous grains containing, for example, 23% or more of moisture are contained in the drier 1 is detected by a suitable moisture value detector 10, and so controlled as to become a normal circulating speed, for example, 1ton per one hour of the rotating speed of the rolls 9 when the fact that the moisture rate of the grains is reduced, for example, to 23% or less is detected by the detector 10. As a result that part of the grains having high tackiness is circulated and fed without adhering and depositing on the inner wall of a drier 101 even if the moisture dispersion amount from the surfaces of the grains is large, the high-aqueous grains are uniformly dried without irregular drying due to irregularity in the flow, thereby rapidly obtaining dried grains of high quality.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a method for drying high-moisture grains with a moisture content of, for example, 23% or more, even when the grains are dried by the ventilation action of dry hot air. It adheres to the inside wall of the machine and causes uneven flow.
This invention relates to a method for drying grains that can quickly dry grains without uneven drying.

Conventional technology Conventionally, inside a dryer, a refining tank is installed in the upper stage, a ventilation drying cylinder is in the middle stage, and a take-out tank is installed in the lower stage in a three-dimensional manner. The chambers are arranged vertically alternately so that a drying passage is formed between the two chambers, with the upper end connected to the tempering tank and the lower end connected to the take-out tank via the feeding roll, and the said temper tank and the take-out yuzu is connected via an elevator, and the grain to be dried loaded in the dryer is made to flow down three times through the tempering tank, ventilation drying drum, and take-out yuzu by the feeding action of the feed roll, and then tempered again by the elevator. A grain drying method in which grains can be quickly dried by circulating back flow to a tank is known and was described in, for example, Japanese Patent Publication No. 48-36753 before the present application.

Problems to be Solved by the Invention Incidentally, in the conventional grain drying method of this type, the grain to be dried loaded in the dryer is circulated in a state with the least damage to the grain, regardless of the moisture content. High moisture content (e.g. 23% or more) because it was circulated by a feed roll that rotates in a constant state so that it is circulated with a predetermined constant circulation time (e.g. 1 hour)
When grains are placed in a dryer and dried, a large amount of moisture evaporates from the surface of the grains while they are stored in the tempered yuzu under warm conditions. The grain surface becomes highly sticky, and some of the grain to be dried adheres and accumulates on the inner wall of the tempering tank, causing uneven flow. As a result, uneven drying occurs, making it difficult to dry the grain uniformly. A problem arose.

Means for Solving the Problems The present invention provides that even when high-moisture grain is placed in a dryer and the grain is dried by the flow of drying hot air, a portion of the heated grain remains. The above-mentioned problem is quickly solved by preventing the buildup from adhering to the inner wall of the tempering tank and causing uneven flow, and by promoting drying. The drawings will be explained.

In other words, when the grain loaded in the dryer 1 has a high moisture content, the circulation speed of the grain is changed to the normal drying speed until a certain condition (for example, moisture content of 23% or less) is established after the start of drying operation. The drying process is controlled to be faster than the circulation rate.

Function If you want to use the dryer 1, which can accommodate 10 stones of grain, to uniformly dry high-moisture grains with a moisture content of 23% or more, for example, without causing uneven drying, first Grain with a high moisture content of 23% or more is filled into a 10 stone dry smoker 1.

Next, in the early stage of drying, the high moisture grains are dried by flowing dry hot air while being made to flow so as to circulate through the dryer 1 at a rate of, for example, 4.6 tons per hour. Once the high-moisture grain has been dried to a moisture content of 23% or less by the above-mentioned initial drying action, the circulation speed of the grain is controlled so that it can circulate and flow through the dryer 101 at 1 ton per hour. If you dry the grain with hot drying air to a finished moisture content of, for example, 14.5%, no matter how high the moisture content of the grain is, the circulation speed will be faster than the normal circulation speed in the early stages of drying, so moisture will evaporate from the surface of the grain. Even if there is a lot of moisture, once a part of the highly sticky grain is deposited on the inner wall of the dryer 101, it will soon be circulated and flowed.
To uniformly dry high-moisture grains without causing uneven drying due to uneven flow, and to quickly obtain high-quality dried grains.

Embodiment An embodiment of a grain drying apparatus for carrying out the grain drying method according to the present invention will be described with reference to the accompanying drawings.

□ In the drawing, 1 is a known circulation type dryer that can accommodate 10 stones of grain;
The refining tank 2 is installed in the upper stage, the ventilation drying cylinder 3 is in the middle stage, and the take-out tank 4 is installed in the lower stage in three-dimensional manner, and the refining tank 2 and the take-out tank 4 are connected via an elevator 5. ing. The ventilation drying cylinder 3 is constructed by alternately disposing hot air blowing frames 6 and hot air exhaust frames T, and forming a drying passage 8 between them. is rotatably mounted on an axis.

The feed roll 9 is placed in the dryer 1 at a moisture content of 23, for example.
% or more is detected by an appropriate moisture value detector 10, the rotation speed of the feed roll 90 is increased, and, for example, 4.6 tons of grain per hour is transferred to the dryer 1.
When the moisture value detector 10 detects that the moisture content of the grains is, for example, 23% or less, the rotation speed of the feed roll 9 is changed to the normal circulation speed, for example, 1. It is configured to be controlled so that the amount is 1 ton per hour.

Reference numeral 11 denotes a hot air generator that blows hot air to the hot air blower frame 6, and 12 represents an air exhaust device that can centrally exhaust the dust air discharged from the hot air exhaust frame 7 to the outside of the aircraft. .

13 is an upper conveyor, and 14 is a lower conveyor. Note that the structure of the dryer 1 is not limited to the structure described above (it goes without saying that a dryer having another structure may be used).

Effects of the Invention In short, the present invention provides dry jP! If the grain packed in the drying chamber has a high moisture content (for example, 23% or more), the circulation speed of the grain will be changed to the normal drying speed until a certain condition (for example, 23% or less) is established after the start of drying operation. Since the drying is controlled to be faster than the circulation speed of the grain, in the early stage of drying, the circulation speed of the high-moisture grain can be accelerated while ventilation drying is performed, allowing the grain to be dried quickly. The effect of preventing some of the highly sticky grains from adhering and accumulating on the inner wall of the dryer 1, eliminating uneven flow and drying, and obtaining uniform, high-quality dried grains. play.

[Brief explanation of the drawing]

The drawing shows an embodiment of a dryer for carrying out the method of the present invention, and is a longitudinal sectional front view.

Claims (1)

[Claims] If the grain loaded in the dryer has a high moisture content, the grain circulation speed is controlled to be faster than the normal drying circulation speed until certain conditions are met after the start of drying operation. A grain drying method characterized by: