JP2558770Y2 - Continuous falling grain drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an improvement of a continuous falling grain drying apparatus.

(Prior Art) There are two types of grain drying methods: continuous flow type and circulating type. Among them, the continuous down-flow dryer inputs the cereal from the upper part of the tank, and the injected cereal is dried by hot air or the like while flowing down the tank and discharged from the lower part of the tank. .

As a conventional example of this continuous-flow dryer, Japanese Patent Publication No. 47-234
There is one disclosed in JP-A-02. In this dryer, a zigzag partition wall is provided inside the tower, and an inclined plate is provided in parallel with the partition wall to form a flow path for the object to be processed between the partition wall and the inclined plate. Then, the object to be treated introduced from the upper part of the tower flows down the downflow path, supplies the drying medium from the lower part of the tower, raises the same downflow path, and opposes the object to be processed and the rising drying medium. Drying by a so-called counter flow.

Further, as another conventional example of a continuous-flow dryer, Japanese Patent Application Laid-Open
There is one disclosed in JP-A-2-44180. The grain drying apparatus disclosed herein vertically forms two rows of grain distribution lower passages so as to partition the interior of the drying chamber in the vertical direction, and provides hot air ducts on both sides of the two rows of grain distribution lower paths, An exhaust wind tunnel is provided between the two rows of grain distribution lower passages, and the hot wind tunnel and the exhaust wind tunnel are horizontally separated. Let the hot air pass through to dry the grain.

(Problems to be solved by the invention) In the above-mentioned conventional continuous down-flow dryer, Japanese Patent Publication No. 47-234
In the system disclosed in Japanese Patent Publication No. 02, the humidity of hot air supplied from the bottom of the tower, for example, becomes higher as it goes up the tower, because the drying method is countercurrent. As described above, when the material to be dried is dried with hot air having a high humidity, the drying speed per unit time is slowed down, and the residence time of the material to be dried in the tower must be increased. Therefore, since the capacity of the tower must be increased, the drying equipment becomes large, the construction cost of the drying equipment increases, and there is a problem to be improved that a large installation space is required.

Further, in the one disclosed in Japanese Patent Application Laid-Open No. 2-44180, hot air is passed so as to be substantially orthogonal to the downflow path of the grain, and the hot air after passing is discharged from the exhaust wind tunnel, so-called Since it is a cross flow type, there is no problem in terms of drying efficiency, but since the downflow path of the grain is provided vertically, it is considerably high to dry the grain until a predetermined humidity is reached. A downflow path for grain is required, and hot air ducts are installed on both sides of the two rows of grain distribution lower paths, and an exhaust duct is installed between the grain distribution lower paths. There is a problem that the cost increases and a large installation space is required.

The present invention uses a compact structure to make zigzag downflow of grain, improve the drying efficiency by changing the drying method to direct flow, and reduce the size of the dryer to reduce construction costs and installation space. The present invention is to provide a continuous falling grain drying apparatus which achieves the following.

(Means for Solving the Problems) A means according to the present invention for solving the above problems is to feed grains from above the grain tank, and in a process in which the fed grains flow down in the grain tank, In a continuous falling grain drying device that is dried by hot air or the like, the inside of the grain tank is divided into two tank chambers by a partition wall, and the two tank chambers divided into a left slope and a right slope downward. Providing alternately sloping air-permeable channel plates,
While alternately fixing the inclined surface upstream end of the flow path plate to the partition wall and the wall surface of the grain tank facing the partition wall,
A gap is alternately formed between the inclined surface downstream end and the partition wall or the wall surface of the grain tank, and the inclined surface downstream end of the channel plate faces the inclined surface upstream end of the channel plate located below. A zigzag grain flow path is formed by the inclined surface of the flow path plate, and a partition wall is formed between the downstream end of the inclined surface of the flow path plate and the partition wall and the downstream end of the inclined surface of the flow path plate and the inner wall surface of the grain tank. To form an air supply passage partitioned by the flow path plate, the partition and the partition wall, and the flow path plate, the partition and the tank inner wall, and an exhaust path on the opposite side of the flow path plate from the air supply path. Is formed, and the hot air supplied to the air supply passage and passing through each flow path plate is discharged to the exhaust passage.

(Operation) The present invention is configured as described above, and has the following operation. That is, in the two divided tank chambers, a gas-permeable flow passage plate is provided which is alternately inclined downward to the left and right slopes, and the upstream end of the inclined surface of the flow passage plate is provided on the partition wall and the wall surface of the grain tank. While alternately fixing, the downstream end of the inclined surface is alternately formed between the partition wall and the wall surface of the grain tank, and the downstream end of the inclined surface of the flow path plate is located at the upstream end of the flow path plate located thereunder. Since the grain passage is formed by the gap and the inclined surface of the passage plate, a zigzag grain passage can be formed in the tank chamber.

And, a partition wall is provided between the downstream end of the inclined surface of the flow path plate and the partition wall and the downstream end of the inclined surface of the flow path plate and the inner wall surface of the grain tank, and the flow path plate and the partition wall and the partition wall and the flow path plate are provided. While forming an air supply path divided by the partition wall and the tank inner wall, an exhaust path is formed on the opposite side of the air supply path from the flow path plate, and the air supply path is supplied to the air supply path and passes through each flow path plate. By discharging the heated hot air to the exhaust path, the air supply path and the exhaust path can be formed using the flow path plate and the flow path of the grain, and the grain flowing in the grain flow path can be formed. Hot air can be passed so as to cross at substantially right angles.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. The grain tank 1 is made of a prismatic container, and the inside of the grain tank 1 is divided into two tank chambers 1a and 1b by a partition wall 2 extending vertically. Further, in the tank chambers 1a and 1b divided by the partition wall 2, there are provided flow passage plates 5 which are alternately inclined downward leftward and rightward, and the flow passage plates 5 have air permeability. For example, a perforated plate is used. The upstream end of the inclined surface of the flow path plate 5 is alternately fixed to the partition wall 2 and the wall surface of the grain tank 1, and the downstream end of the inclined surface is alternately arranged between the partition wall 2 and the wall surface of the grain tank 1. And the downstream end of the inclined surface of the flow path plate 5 faces the upstream end of the flow path plate 5 located thereunder. A grain flow path 3 is formed. The inclination angle of the flow path plate 5 is the angle of repose of the grain (about 30 degrees in the present embodiment), and the grains on the inclined surface of the flow path plate 5 slide down at once, and a so-called bridge is formed in the gap. It has been made so that grain can flow down smoothly. Further, by setting the inclination angle of the flow path plate 5 to the angle of repose of the grain in this way, a grain layer having a substantially uniform thickness can be formed on the flow path plate 5. In short, the inclination angle of the flow path plate 5 is not limited to the angle of repose as long as a bridge cannot be formed in the gap and the grain layer on the flow path plate 5 becomes substantially uniform.

Further, partitions 6 and 7 are provided between the downstream end of the inclined surface of the flow path plate 5 and the partition wall 2 and the downstream end of the inclined surface of the flow path plate 5 and the inner wall surface of the grain tank 1 to form the air supply passage 15. At the same time, an exhaust path 16 is formed in a space between the partition walls 6 and 7 and the grain flow path 3, and hot air supplied to the air supply path 15 and passing through the flow path plate 5 is discharged to the exhaust path 16. I have.

In FIG. 2, a hot air hood 8 and an exhaust air hood 9 are attached to the wall surface of the grain tank 1, respectively, and the hot air sent from the hot air hood 8 passes through a through hole 17 shown in FIG. The hot air that has flowed in and has been exhausted to the exhaust path 16 is collected in the exhaust hood 9 through the through hole 18 shown in FIG. This exhaust port 13 is open to the atmosphere or connected to a dust collector or the like. As shown in FIG. 3, the hot-air hood 8 and the exhaust-air hood 9 are divided into two by a wall 10 from which the partition wall 2 is extended. The driven blower 11 is connected.

At the upper part of the grain tank 1, a grain inlet 20 is provided, and the upper end of the partition wall 2 faces into the grain inlet 20.
The inside is divided into two input ports 21a and 21b. A switching valve 22 is rotatably provided at an upper end portion of the partition wall 2 in the grain input port 20. The switching valve 22 is provided at a position where one of the input ports 21a and 21b is closed by appropriate means. , Or both are in an open position.

The grain tank 1 is provided with a discharge valve 23,
The cereals are provided so as to communicate with the cereal channels 3 formed in a and 1b, respectively, and the cereal is discharged from the discharge valve 23 by an appropriate discharging means.

Next, the operation of the present embodiment thus configured will be described. In FIG. 1, a partition wall 2 is provided in a grain tank 1.
Is divided into two tank chambers 1a and 1b, and a grain passage 3 is formed in each of the tank chambers 1a and 1b. Therefore, when the amount of grain to be dried is small, either one of the tank chambers 1a or 1b Can be used, a small amount of grain can be dried, and one of the blowers 23 can be used, so that power consumption can be reduced. Further, since two types of grains can be dried at the same time, the operation rate can be improved.

Then, the inside of the grain tank 1 is divided into two in this way, and a gas-permeable flow path plate 5 that is alternately inclined downward in a left gradient and a right gradient is provided in the two divided tank chambers 1a and 1b, The upstream end of the inclined surface of the flow path plate 5 is partitioned by the partition wall 2 and the grain tank 1.
And the partition wall 2 is alternately fixed to the wall surface of the grain tank 1, and the downstream end of the inclined surface is alternately fixed to the wall surface of the grain tank 1. By facing the upstream end of the surface, the gap and the inclined surface of the flow path plate 5 form the flow path 3 of the grain, so that each of the tank chambers 1a and
A zigzag grain flow path 3 can be formed in 1b.

Then, partitions 6 and 7 are provided between the downstream end of the inclined surface of the flow path plate 5 and the partition wall 2 and between the downstream end of the inclined surface of the flow path plate 5 and the inner wall surface of the grain tank 1 to form the air supply passage 15. The hot air supplied to the air supply path 15 and passed through the flow path plate 5 is discharged to an exhaust path 16 defined by the grain flow path 3 and the partitions 6 and 7, so that the hot air flows through the grain flow path 3. Hot air can be passed through the layer of grain at right angles.

In addition, the air supply passage 15 includes a flow path plate 5, partition walls 6 and 7, a partition wall 2.
Or it is a room surrounded by the wall of the grain tank 1,
Since the flow path plate 5 is a perforated plate, the hot air supplied to the air supply passage 15 temporarily stays in the air supply passage 15 and flows out from the perforations of the flow passage plate 15. And the cereal on the flow path plate 15 can be dried substantially uniformly.

Further, since the air supply path 15 is formed by using the flow path plate 5 and the exhaust path 16 is formed by using the zigzag-shaped grain flow path 3, the grain flow path is formed in the grain tank 1. 3, the supply path 15 and the exhaust path 16 can be formed compactly, and
The air supply path 15 and the exhaust path 16 can be made to correspond one-to-one to one flow path plate 15.

(Effects of the Invention) As described in detail above, according to the present invention, a gas-permeable channel plate is provided in two divided tank chambers, which is alternately inclined downward to the left and right in a downward direction. The upstream end of the inclined surface is alternately fixed to the partition wall and the wall surface of the grain tank, and the downstream end of the inclined surface is alternately formed with a gap between the partition wall and the wall surface of the grain tank. With the end facing the upstream end of the inclined surface of the flow path plate located on the lower side, the gap and the inclined surface of the flow path plate form a grain flow path, and a zigzag grain flow path is formed in the tank chamber. Is formed, the residence time of the grain in the grain tank can be lengthened, and the grain tank can be made compact.

Further, a partition is provided between the downstream end of the inclined surface of the flow path plate and the partition wall and the downstream end of the inclined surface of the flow path plate and the inner wall surface of the grain tank to form an air supply path, and the air supply path is supplied. The hot air that passed through the flow path plate was discharged to an exhaust path defined by the grain flow path and the partition wall, and the supply path and the exhaust path were formed by using the flow path plate and the flow path of the grain. The grain can be dried in a short period of time by passing hot air so as to cross the grain flowing in the grain flow path almost at right angles. This makes it possible to reduce the size of the continuous-flow-type grain dryer as a whole, thereby reducing the construction cost and the installation space.

[Brief description of the drawings]

1 is an enlarged longitudinal sectional view of the present invention along the line AA in FIG. 2, FIG. 2 is an overall front view of the present invention, FIG. 3 is a plan view of FIG. 2, and FIG. FIG. 5 is an enlarged sectional view taken along line AA of FIG. 5, and FIG. 5 is an enlarged sectional view showing another embodiment of the grain inlet. DESCRIPTION OF SYMBOLS 1 ... Grain tank 2 ... Partition board 3 ... Grain passage 5 ... Flow passage plate 6 ... Partition wall 7 ... Partition wall 15 ... Air supply path 16 ... Exhaust path

Claims (1)

(57) [Scope of request for utility model registration] 1. A continuous falling grain drying apparatus wherein a grain is charged from above a grain tank, and the charged grain is dried by hot air or the like while flowing down the grain tank. The inside of the tank is divided into two tank chambers by a partition wall, and a gas-permeable flow path plate is provided in the two divided tank chambers, which is alternately downwardly inclined leftward and rightward in a downward direction. While alternately fixing the inclined surface upstream end to the partition wall and the wall surface of the grain tank opposed to the partition wall, the inclined surface downstream end is formed alternately with the partition wall or the wall surface of the grain tank, With the sloped surface downstream end of the flow path plate facing the sloped surface upstream end of the flow path plate located below, a flow path of zigzag grain is formed by the sloped surface of the flow path plate, The downstream end of the inclined plane and the downstream end of the partition wall and flow path plate A partition wall is provided between the inner wall surface of the grain tank and an air supply passage defined by the flow path plate, the partition wall, and the partition wall, and the flow path plate, the partition wall, and the tank inner wall. A continuously flowing grain drying apparatus, wherein an exhaust path is formed on the side opposite to the air supply path, and hot air supplied to the air supply path and passing through each flow path plate is discharged to the exhaust path.