JPS6311589Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a grain dryer which has a hot air blowing chamber and a dust exhausting chamber located at opposing positions on both sides of the lower part of the long front-to-rear dryer body, but which allows the grain circulating within the dryer body to flow at a uniform flow rate throughout without causing condensation, thereby efficiently producing uniformly dried grain.

First, the present applicant has developed a hot air chamber, an exhaust chamber, and a paddy flow path constructed within the main body of the dryer, as described in Japanese Patent Application No. 57-151138 (see Japanese Patent Application Laid-open No. 59-41775). By increasing the number and shortening the length of the drying air, the loss of drying air is reduced as much as possible, and even with the same amount of drying air, more drying air is applied to the grains, improving drying efficiency. In order to increase the durability of the dryer chamber and ventilation chamber and to achieve uniform drying while preventing the bridging phenomenon of the filled grains, there are two A hot air blowing room and a dust exhausting air chamber are provided, and between the hot air blowing room and the dust exhausting air chamber, a plurality of rows of hot air chambers each having one end connected to the hot air blowing chamber and one end connected to the dust exhausting air chamber are provided. We have developed a grain dryer in which a plurality of connected rows of ventilation chambers are alternately installed so that a plurality of rows of paddy flow paths are formed between the chambers.

However, in the case of the above grain dryer,
The hot air chambers were formed in rows of corners and the exhaust chambers were arranged in odd rows, so the front and rear walls of the dryer body were surrounded by the exhaust chambers, and one side wall in the longitudinal direction of the dryer body was surrounded by the exhaust chambers. The sides will also be surrounded by a dust ventilation room.

Therefore, the side wall of the dryer body facing the hot air ventilation chamber is maintained in a heated state by the heat transfer effect of the circulating drying air, whereas the side wall of the dryer body facing the hot air ventilation chamber is maintained in a heated state by the heat transfer effect of the circulating drying air, whereas the side wall of the dryer body facing the hot air ventilation chamber is The front and rear walls and one side wall of the dryer body are cooled by the circulation action of the dust exhaust air, which has a temperature considerably lower than that of the drying air, and are brought to a low temperature state, resulting in a considerable temperature difference on the entire peripheral wall of the dryer body. the result,
When the grain in a stagnant state filled in the dryer body is circulated and flowed, condensation occurs on the front and rear walls of the dryer body and the inner surface of the side wall on the dust exhaust air chamber side, and the grains flow down at these positions. Not only will the speed be significantly reduced, but if there is significant dew condensation, the grains will no longer flow, creating an uneven flow in which only the grains facing the hot air blowing chamber will flow, and the grains will be dried evenly. The disadvantage is that it cannot be done.

Therefore, in order to solve the above-mentioned drawbacks of the grain dryer, the present invention aims to solve the problem of grain drying, even if a hot air blowing chamber and a dust exhausting chamber are provided at opposing positions on both sides of the lower part of the long dryer main body. High-temperature drying air is distributed around the entire circumference of the dryer body, eliminating any condensation on the inner surface of the side walls of the dryer body, and ensuring that the grain in the stagnant state is uniformly distributed throughout the dryer at all times. It is an object of the present invention to provide a grain dryer which enables circulating flow within a dryer main body at a constant flow rate and easily obtains uniformly dried grains at all times.

In view of the above, in order to achieve the above object, the present invention has a structure in which a hot air blowing chamber and a dust exhausting air chamber are provided at opposite positions on both sides of the lower part of a long dryer main body, and the hot air blowing chamber and the dust exhausting air chamber are There are odd rows of hot air chambers oriented perpendicular to the horizontal direction, some of which are located in front and behind the dryer main body, and one end connected to the hot air ventilation chamber, and one end connected to the dust exhaust ventilation chamber. Several rows of corner rows of ventilation chambers connected to the chamber are constructed alternately so that rows of corner rows of paddy flow paths are respectively formed between the chambers, and the upper part of the dust exhaustion ventilation chamber is partitioned by a partition wall, In addition, the grain dryer is characterized in that preheating chambers are connected to odd rows of hot air chambers, and the inner periphery of the dryer body is surrounded by the hot air blowing chambers, the hot air chambers, and the preheating chambers. According to such a grain dryer, high-temperature drying air is constantly circulated around the entire circumference of the dryer body, and a temperature difference is generated across the entire peripheral wall of the dryer body due to the heat transfer action of the drying air. The temperature is raised to a substantially uniform temperature without any problem, and even when grains in a stagnant state are circulated and flowed inside the dryer body, it is possible to ensure that no condensation forms on the inner peripheral wall surface of the dryer body. It is possible to smoothly flow down the grains at a uniform flow rate, eliminate the generation of uneven dry grains caused by uneven flow that conventionally tends to occur, and have the effect of efficiently obtaining uniform dry grains at all times.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a grain dryer according to the present invention will be described below, as shown in the accompanying drawings.

In the drawings, reference numeral 1 denotes a dryer main body having a rectangular cylindrical shape that is long in the front and rear direction, and the width of the dryer main body 1 is gradually increased from the upper part to the lower part on the lower left and right side walls 1a and 1b. A hot air blowing chamber 2 and a dust exhausting air chamber 3 having similar shapes are arranged facing each other and separated by partition walls 4 and 5. At a position above the space between the hot air blowing chamber 2 and the dust exhaust air chamber 3, a part thereof is located in a direction perpendicular to the horizontal direction, and a part thereof is located in front and behind the dryer main body, and one end is located in the direction perpendicular to the horizontal direction. A hot air chamber 6 consisting of an odd number of first-stopped rows connected to the chamber 2 through a ventilation window 7... and an even numbered first-stopped row of wind exhaust rooms connected at one end to the dust removal chamber 3 through an exhaust window 9. room 8
... are installed alternately so that several rows of paddy flow paths 10 are formed between the hot air chamber 6 and the exhaust air chamber 8, and the upper end of the paddy flow path 10 is connected to the hot air chamber 2 ... and the exhaust air chamber 8. It is connected to the tempering tank 11 formed in the upper part of the chamber 3..., and its lower end is provided with a corrugated partition wall 12 formed in the lower part of the hot air chamber 6... and the exhaust chamber 8... It is connected to chamber 13. The hot air chambers 6 and the exhaust chambers 8 have side surfaces facing the paddy flow path 10 formed into ventilation surfaces 14 and 15, and open lower portions 16 and 17.
and the inside of the exhaust chamber 8 are connected to the feeding chamber 13. Therefore, with the above configuration, the front and rear side walls 1c of the dryer main body 1,
On the 1d side and the right side wall 1a side, the lengths of the hot air chamber 6, the exhaust chamber 8, and the paddy flow path 10 are formed to be short, perhaps because the hot air chambers 6, 6 and the hot air blowing chamber 2 are located in the shape. Increase the number as much as possible,
The hot air chamber 6... and the exhaust chamber 8... can be easily manufactured, and even if the sedimentation pressure of the grains filled in the refining tank 11 is large, the durability can be increased without bending. By increasing the number of ventilation windows 7 and exhaust windows 9, the resistance to the hot air blown from the hot air ventilation chamber 2 can be reduced, and the amount of air blown from the hot air ventilation chamber 2 can be increased. In addition, by opening the lower portions 16 and 17 of the hot air chamber 6 and the exhaust chamber 8, the paddy flow path 10
Even if part of the dust mixed in the grain flowing down therein enters the hot air chamber 6 and the exhaust chamber 8 from the ventilation surfaces 14 and 15, the dust and the like will be removed from the hot air chamber 6. . . . and the exhaust chamber 8 . . . are all smoothly flowed down to the lower dispensing chamber 13 without being deposited on the inner bottom, thereby preventing fire accidents in the grain dryer due to ignition and combustion of accumulated dust and the like.

Note that since the feeding chamber 13 is always filled with grains that have flowed down through the paddy channels 10, leakage of hot air and exhaust air can be prevented. A feeding port 18 is opened in each trough of the wave-shaped partition plate 12 along the front-rear direction, and the feeding port 18 is opened in each valley portion of the wave-shaped partition plate 12.
A feed-out roll 19, which is rotated intermittently, is rotatably mounted on a shaft at the ... position. At the lower part of the feeding chamber 13 formed as described above, there is a taking out chamber 20 surrounded by the hot air blowing chamber 2, the dust exhaust air chamber 3, the feeding chamber 13, and the front and rear side walls 1c and 1d of the dryer main body 1. At the same time, a carry-out gutter 21 is provided along the front-rear direction in the lower space between the hot air blowing chamber 2 and the dust exhaust air chamber 3, and this connects the carrying-out gutter 21 with the take-out chamber 20. A carry-out scree 22 is rotatably hung horizontally inside the carry-out gutter 21, and one end of the carry-out gutter 21 is connected to the lower part of a circulation elevator 23 installed upright on one side of the dryer main body 1.
The upper part of the circulation elevator 23 is connected to the supply start end side of a carry-in gutter 24 installed horizontally along the front-rear direction at the top of the dryer main body 1. A burner device 25 housing a burner 26 therein and a suction exhaust device 27 rotatably housing a suction exhaust fan 28 are installed on the front side of the hot air blowing chamber 2 and the rear side of the dust exhaust air chamber 3, respectively. At least, the burner device 25 and the hot air blowing chamber 2 are connected, and the suction and exhaust device 27 is connected to the dust removal air chamber 3, and the burner device 25 and the suction and exhaust device 28 can be installed freely forward and backward. The direction of the dust exhaust air can be selected to the front side or the rear side with respect to the dryer main body 1 depending on the installation conditions in the workplace.

A small preheating chamber 30 partitioned by a partition wall 29 is disposed in the upper interior of the dust exhaust air chamber 3 configured as described above, and this preheating chamber 30 is located at the tip of the hot air chamber 6 in the odd row. They are connected via hot air passages 31 opened to the partition walls 5 forming the side sealing portions. Therefore, the left wall 1b side of the dryer main body 1 facing the upper side of the dust exhaust air chamber 3 also has a preheating chamber 30.
Therefore, the inner walls 1a, 1b, 1c, and 1d of the dryer main body 1 are completely surrounded by the hot air blowing chamber 2, the hot air chambers 6, 6, and the preheating chamber 30, and the dryer main body 1 inner wall entire circumference 1a, 1
b, 1c, 1d and the partition wall 5 are heated to prevent condensation from forming on their inner surfaces, so that grains in a stagnant state inside the dryer main body 1 have an even flow rate without causing uneven flow. Allow it to flow.

Next, its effect will be explained.

Now, if the grain to be dried is supplied into the tempering tank 11 via the circulation elevator 23 and the carry-in gutter 24,
The grains are not only stored in the conditioning tank 11 but also in the paddy channel 10...
...and the feeding chamber 13 is filled, and the hot air chamber 6...
. . . and the open portions 16 and 17 of the exhaust chamber 8 . . . are closed with the filled grains.

When a predetermined amount of grain is filled into the dryer main body 1 in this way, the supply is stopped, and at the same time, the burner 26 and the suction/exhaust fan 28 are operated, and then,
The delivery roll 19... and the delivery screen 22 are rotated. Then, the combustion flame of the burner 26 mixes with the outside air sucked into the hot air blowing chamber 2 from the burner device 25 by the negative pressure action of the suction/exhaust fan 28, and becomes hot air at an appropriate temperature. The hot air chamber 6 is sucked and filled through each of the ventilation windows 7, and then passed through the paddy flow path 10 through the ventilation surface 14, and then from the ventilation surface 15 into the exhaust chamber 8. and is sucked into the dust exhaust air chamber 3 through the exhaust window 9...
Finally, the suction and exhaust device 28 exhausts the air in a concentrated manner far outside the machine. Therefore, by the intermittent rotation operation of the feeding rolls 19..., the grains that flow down the paddy flow path 10 are dried by being exposed to the circulating hot air.
After being deposited in a flowing manner, it is discharged into the take-out chamber 20 by the pay-out roll 19 . And take-out chamber 20
The dried grains discharged into the tank are conveyed by the carry-out scree 22 along the carry-out gutter 21 to the lower part of the circulation elevator 23, and then returned to the tempering tank 11 through the carry-in gutter 24 for circulation. . Therefore, if the above-mentioned circulation drying operation is performed multiple times, the grains will be dried to the required moisture content and the drying operation will be completed.

By the way, during the circulation drying work as described above, the hot air blowing chamber 2 and the preheating chamber 30 are provided on the left and right side walls 1a and 1b of the dryer main body 1, and the front and rear side walls 1
Hot air chambers 6, 6 are located in c, 1d, respectively, and the left and right, front and rear side walls 1a, 1b, 1c,
1d is heated by the circulating drying air, all the side walls 1a, 1b, 1c, 1d of the dryer main body and the partition walls 4, 5 are heated to a uniform temperature by the heat transfer action of the drying air, and the temperature is approximately the same. The temperature will be maintained.

Therefore, even if the grains in a stagnant state are made to flow sequentially through the inside of the dryer main body 1 according to the intermittent rotation operation of the payout rolls 19..., condensation will not occur inside the dryer main body 1 due to the uniform temperature increase effect. The entire grain can be circulated and flowed at a uniform flow rate without causing any dry grain, and uniformly dried grain can be efficiently obtained.

[Brief explanation of drawings]

The drawings show an embodiment of the grain dryer according to the present invention, in which Fig. 1 is a front view taken longitudinally through the hot air chamber, Fig. 2 is a front view taken longitudinally through the exhaust chamber, and Fig. 2 is a front view taken longitudinally through the exhaust chamber. FIG. 3 is a longitudinal sectional side view of FIG. 1. 1...Dryer main body, 1a, 1b...Left and right side walls of the dryer main body, 2...Hot air blowing chamber, 3...Dust removal air chamber, 6...Hot air chamber in odd numbered rows, 8...Exhaust in corner rows Wind room, 10...Paddy flow path with several rows of corners, 29...Partition wall,
30... Preheating chamber, 1c, 1d... Front and rear side walls of the dryer main body.

Claims (1)

[Scope of utility model registration request] A hot air blowing chamber and a dust exhausting air chamber are provided at opposing positions on both sides of the lower part of the long dryer main body, and between the hot air blowing chamber and the dust exhausting chamber, there is a hole facing in a direction perpendicular to the horizontal direction, and one of them. The hot-air chambers in odd-numbered rows are located at the front and rear of the dryer main body, and one end is connected to the hot-air ventilation chamber, and the even-numbered row of ventilation chambers is connected to the dust exhaust ventilation chamber at one end. The chaff is constructed alternately so that the paddy flow paths are formed respectively, and a preheating chamber is provided above the dust exhaust air chamber, which is partitioned by a partition wall and connected to the hot air chambers in the odd rows. A grain dryer characterized in that the inner periphery of the machine body is surrounded by a hot air blowing chamber, a hot air chamber, and a preheating chamber.