JPH0437358B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a ventilation drying device for shell grains that circulates and flows the shell grains filled in a shell tank and dries them by supplying drying air thereto.

In the above-mentioned shell grain ventilation drying device, the shell grains placed in the shell tank are separated by an air-permeable partition wall such as a net that constitutes an exhaust path and an air-permeable partition wall such as a net that constitutes an air guide path. The shell particles flow into the shell flow passage formed at the bottom of the shell tank, and flow at a speed regulated by the outflow amount by a drum shutter (or rotary valve) provided at the outlet at the lower end of the shell flow passage. At the point where it flows out from the outlet at the lower end of the shell particle flow path, it is returned to the upper part of the shell tank by a conveyor and an elevator (bucket elevator), causing a circulation flow. During the circulation flow, the above-mentioned While the grains are flowing down the shell flow passage, they are successively dried by being exposed to drying air that blows through the exhaust passage from the air guiding passage side so as to cross the shell grain flow passage.

From this, in order to increase the drying efficiency, it is possible to increase the time during which drying air is exposed to the shell grains during one circulation process, and to slow down the speed at which the shell grains flow down the flow path. There is a problem in that it takes time to circulate the shells, which actually reduces efficiency, making it difficult to increase drying efficiency.

In addition, as a means to extend the time during which drying air is applied to the shell grains flowing down the shell grain flow passage, a drying air supply passage is provided above the shell grain flow passage, and the lower end side of the shell grain flow lower passage is Japanese Unexamined Patent Publication No. 174680/1983 discloses a method of providing an exhaust port communicating with the exhaust passage so that the drying air flows vertically through the shell flow passage. The thickness of the shell grain layer through which the drying wind permeates corresponds to the longitudinal length of the shell flow path and becomes significantly thicker, allowing the drying wind to pass through this thick shell grain layer. In order to do this, the supply pressure of the drying air must be made very high, which creates another problem that increases costs.

In addition, by forming the shell particle flow downstream path between the air-permeable partition walls that are in contact with the exhaust path and the air-permeable partition walls that constitute the hot air guide path, and between these partitions, To increase the amount of hot air that is blown out and flowing into the exhaust passage across the shell grain flow passage, and to blow the hot air toward the shell grains flowing down the shell grain flow passage. There is a method of thinning the layer of shell grains in the direction in which the hot air blows through by narrowing the facing interval between the partition wall on the exhaust passage side and the partition wall on the air guiding passage side, which is the width of the shell flow lower passage. but,
With this method, hot air of the same temperature blows through the entire area from the upper end to the lower end of the shell flow passage, so when the temperature of the hot air to be supplied is increased, the shell grains flow down the shell flow passage. As the temperature gradually increases, the temperature of the shell grains becomes higher at the lower end of the shell flow path, causing changes in the shell grains, which creates a problem that limits the temperature of the hot air that is supplied. There is.

The present invention has been made in order to solve these problems occurring in the conventional means. This is done by hot air blowing across the shell from one side to the other, and the thickness of the layer of shell grains in the direction through which the hot air passes is made thinner so that the time spent exposed to the hot air is extended. However, in order to increase the amount of hot air that passes through the shell grain layer flowing down the shell grain flow path,
The purpose of the present invention is to provide a new means for efficiently drying shell grains by thinning the shell grain layer without causing deterioration of the shell grains due to temperature rise. .

In the present invention, as means for achieving this object, an exhaust passage is provided between the front and rear walls of the fuselage so as to cross the bottom of the inner cavity of the shell tank back and forth by means of a breathable partition, and A hot air guide path is provided between the front and rear machine walls of the aircraft in parallel with the exhaust path, and a shell particle flow downward path is formed between these opposing ventilation partition walls, with the upper end leading to the bottom of the shell tank. At the inlet of the lower shell flow passage, a shell guide wall is installed in which the shell grains flowing into the lower flow passage are diverted to the left and right and then merged again.The shell grain guide wall is formed in the shape of a wind trunk with an air permeable partition wall. This invention proposes a shell grain ventilation drying device characterized in that the inner cavity of the shell grain guide wall is communicated with a hot air generating device through a communication duct provided on the outer surface of the shell tank in the front and back direction. be.

Next, an example of implementation will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes the body of the shell and grain ventilation drying apparatus A, which is shaped like a box with vertically high heights.

Reference numeral 2 denotes a shell tank installed in the inner cavity of the fuselage 1, and its peripheral wall shares the front and rear walls 10 and the left and right walls 11, 11 of the fuselage 1.

a and a are shell particle flow passages formed at the bottom of the shell tank 2, from the inner surfaces of the upper and lower intermediate parts of the left and right machine walls 11, 11 to the left and right central parts of the bottom of the inner cavity of the fuselage 1, respectively. Air permeable bulkheads 20, 20 that slope downward toward the front and rear walls 10 of the fuselage 1,
It is formed into a cylindrical shape with exhaust passages b, b provided across the bottom of the shell tank 2 in the front and back directions on both sides of the bottom of the shell tank 2, and an air-permeable partition wall 30. An air guide path c is provided between the front and rear machine walls 10 of the fuselage 1 so as to cross the bottom inner cavity of the shell tank 2 back and forth between the exhaust channels b and b,
By installing them in parallel, the partitions are narrowly partitioned from side to side by the partition wall 20 of the exhaust path b and the partition wall 30 of the air guide path c, which face each other from side to side, and are formed in a long continuous state in the vertical direction. . Then, this shell particle flow path a,
Each lower end of a merges with the outlet 21 formed by the lower edges 20a, 20a of the left and right inclined ventilation partition walls 20, 20 forming the exhaust passages b, b, and the outlet 21 Each drum shutter 4 is closed by a peripheral wall 40 of a drum shutter 4 provided in each of the shells, and when the drum shutter 4 rotates and faces the opening 41 provided in its peripheral wall 40, the shell particle flow downstream path a,
The shell grains in a flow into the drum shutter 4 through the opening 41, and are discharged by rotating the drum shutter 4 so that the opening 41 is located below the outlet 21. It's starting to go well.

Reference numeral 5 denotes a screw conveyor for conveying shell grains flowing out from the outlet 21 to the outside of the machine body 1 by the rotation of the drum shutter 4, and is composed of a screw 50 and a conveying gutter 51, and its terminal end in the conveying direction is ,
It protrudes forward from a machine wall 10 on the front side of the machine body 1, is connected to and communicates with the lower part of an elevator 12 erected on the front side of the machine wall 10, and is further connected to the upper part of the elevator 12 at the starting end side in the transport direction. It communicates with the upper part of the shell tank 2 via a conveyor 13.

Reference numerals 6 and 6 denote shell grain guide walls installed in the shell tank 2 and arranged at the respective inlets of the above-mentioned shell grain flow channels a and a formed at the bottom of the shell tank 2; The upper surface side is shaped like an umbrella when viewed from the front so that the shell grains flowing down from the side toward the entrance of each shell grain flow passage a are divided into left and right sides as shown by the double-lined arrow in Fig. 1. formed into;
The structure of the bridge between the front and rear machine walls 10, 10 of the aircraft body 1 is the same as in the case of previous shell guide walls of this type, but the air-permeable bulkheads such as nets or perforated boards are used to create a wind trunk-like structure. It is formed in

As shown in FIG. 2 and FIG. The air guide path c
As shown in FIG.
The above-mentioned exhaust passages b, b are connected to the hot air generating device 7 via the communication ports 80, 80 provided in the machine wall 10 on the rear side of the machine body 1, and the duct 81 provided on the outer surface of the machine wall 10. It is connected to the suction port of the exhaust fan 8 (suction fan) via the exhaust fan 8 (suction fan).

As a result, when the exhaust fan 8 is operated and the exhaust paths b and b become negative pressure, the air in the air guide path c and the air in the spaces d and d surrounded by the shell grain guide walls 6 are By flowing as shown by the thin arrows in the figure, the hot air (dry air) sent from the hot air generating device 7 (burner device) into the air guide path c flows in the direction of the long thin arrow among the thin arrows. Along the grain flow, the grains flow toward the exhaust passage b across the lower passage a, and at the same time, 2
As shown by the double-lined arrow, the hot air flows from the communication port 62 through the duct 61 and the communication port 60 into the spaces d and d surrounded by the shell grain guide walls 6, and the hot air flows as indicated by the short thin line in FIG. Exhaust path b, b along the arrow shown in
The spaces d, d surrounded by the shell grain guide walls 6 serve as auxiliary guides for supplying drying air to the shell grains flowing down toward the entrance of the shell grain flow paths a, a. It is designed to serve as a wind path.

In addition, the arrow shown by the double chain line in FIG. Since it is lower than the static pressure in the air guide path c,
This shows the flow of drying air directly from the air guide path c into the space d without passing through the path indicated by the double-lined arrow in FIG. 2 described above. The amount of this flow is much smaller than that of the dry air flow indicated by the double-lined arrow in FIG. 2 described above.

The thus constructed embodiment apparatus operates as follows.

By the operation of the drum shutter 4, the screw conveyor 5 for discharge, the elevator 12, etc., the shell grains filled in the shell tank 2 are moved through the shell grain flow channels a, a installed at the bottom of the shell tank 2. In a state where the fluid is circulating and flowing through it and returning to the upper part of the shell tank 2,
If the hot air generator (burner device) 7 is activated and the exhaust fan (suction fan) 8 is activated,
The hot air (dry air) generated by the hot air generator 7 flows from the air guide path c formed by the air-permeable partition 30, crosses the shell grain flow lower paths a, a, and heads toward the exhaust path b. The air passes through the shell layer flowing down in the shell flow paths a, a, and as a result, the shell is exposed to hot air, thereby drying the shell.

At this time, hot air is supplied to the shell grains through the air guide path c and into the duct 61 by the operation of the exhaust fan 8.
The spaces d, d surrounded by the umbrella-shaped shell guide walls 6 communicating through the space become negative pressure, and the hot air generated by the hot air generator 7 flows into these spaces d, d as well. Therefore, the air permeable partition wall 3 forming the air guide path c
Hot air is blown out from the shell grain flow path a, crosses the shell grain flow downstream paths a, and heads toward the exhaust path b, and hot air is blown out from the grain guide wall 6, which is made of an air-permeable partition wall that forms the space d, and heads toward the exhaust path b. It is carried out by two parties.

Therefore, the area of the hot air passing through the shell grain layer in the direction perpendicular to the transmission direction is expanded by the portion 6a of the umbrella-shaped shell guide wall 6 that forms the space d, facing the exhaust path b. This part 6a
The shell grains are exposed to a large amount of hot air by the amount of hot air blown from the shell.

The umbrella-shaped shell guide wall 6 forming this space d is provided at the entrance of the shell flow path a so as to divide the shell grains flowing into the flow path a left and right. Therefore, the shell grain flow path a' formed between the above-mentioned portion 6a of the umbrella-shaped shell grain guide wall 6 from which hot air is blown out and the partition wall 20 of the exhaust passage b that opposes it has a thickness in the hot air transmission direction. The thickness is approximately half that of the grain flow lower passage a' formed between the partition wall 30 of the air guide passage c and the partition wall 20 of the exhaust passage b.

For this reason, the thickness of the shell layer in the hot air transmission direction near the entrance of the shell flow lower passage a is the same as that of the shell grain layer formed between the partition wall 30 of the air guiding passage c and the partition wall 20 of the exhaust passage b. The thickness of the shell grain layer in the hot air transmission direction in path a' is reduced to approximately half, and the resistance when the hot air passes through is halved, so that the shell grain layer is thinned from the portion 6a of the shell grain guide wall 6 toward the exhaust path b. The amount of hot air blown out increases significantly.

From this, the shell grains flowing down the shell grain flow path a are first exposed to the hot air whose permeation resistance is halved and the permeation amount is increased at the entrance of the shell grain flow path a, and this inlet region is When the hot air flows through the shell grain flow passage a, the thickness of the shell grain layer returns to a predetermined thickness and the permeation resistance increases, so that the hot air, whose permeation amount has decreased, is continuously Then, you will be able to take a bath.

As explained above, the shell grain ventilation drying device according to the present invention has a shell grain flow path a for blowing hot air while the shell grains are flowing down, a partition wall 30 of an air guide path c for blowing out hot air, and a partition wall 30 for blowing out hot air to discharge the hot air. By arranging the partition walls 20 of the exhaust passage b to face each other from the left and right, the hot air is configured to pass across the flowing shell grains,
At the entrance of the lower shell flow passage a, a shell guide wall 6 is installed in the shape of a wind trunk with an air permeable partition wall, which separates the shell grains flowing into the lower shell flow passage a to the left and right and joins them again. The thickness of the shell grain layer in the hot air transmission direction of the shell grains flowing into the shell grain flow lower passage a is the same as that of the shell grain flow lower passage a. It becomes thin once at the inlet part a, and after passing through the inlet part, it returns to the thickness equal to the width of the shell grain flow lower passage a. Then, the hot air blown from the shell grain guide wall 6 passes through the thin shell layer at the inlet portion and flows into the exhaust passage b, so that the shell grains flowing down the shell grain flow passage a are , is exposed to a large amount of hot air at the beginning of the flow, when the temperature does not rise to a high temperature even when hot air is supplied, and then passes through the shell grain layer with a thickness corresponding to the width of the left and right spacing of the shell grain flow downstream passage a. The shell grains flow down the flow path a while being exposed to a predetermined permeation amount of hot air.

Therefore, in order to efficiently supply hot air to the shell grains flowing down the shell grain flow path, the hot air is blown across the shell grain flow path from one side to the other side. In this way, the thickness of the shell grain layer in the direction through which the hot air permeates is made thinner so that the time of exposure to hot air is extended, while increasing the amount of hot air that passes through the shell grain layer flowing down the shell grain flow path. In order to achieve this, the shell grain layer can be made thinner without altering the quality of the shell grains due to an increase in temperature, and the shell grains can be dried more efficiently.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a grain shell ventilation drying device for carrying out the present invention, and FIG.
Transverse plan view of the main parts of the same device cut along a line, No. 3
The figure is a partially cutaway side view of the rear end side of the same device. Explanation of drawing symbols, A...Shell grain ventilation drying device, a
...Shell particle flow down passage, b... Exhaust passage, c... Air guide passage,
d... Space, 1... Aircraft, 10... Front and rear aircraft walls,
11...Left and right aircraft walls, 12...Elevator, 13...
Conveyor, 2...shell tank, 20...breathable bulkhead,
20a...lower edge, 21...outlet, 30...breathable partition, 31...communication port, 32...duct, 4...
... Drum shutter, 40 ... Peripheral wall, 41 ... Opening, 5 ... Screw conveyor, 50 ... Screw, 51 ... Conveying gutter, 6 ... Shell guide wall, 6a
...Part, 60...Communication port, 61...Duct, 6
2...Communication port, 7...Hot air generation device (burner device), 8...Exhaust fan (suction fan), 80...Communication port, 81...Duct.

Claims (1)

[Claims] 1 The front and rear machine walls 10, 10 of the machine body 1 are arranged so as to cross the inner cavity bottom of the shell tank 2 in the front and rear directions by the breathable partition wall 20.
Aircraft walls 1 at the front and rear of the aircraft body 1 are parallel to the exhaust path b by means of an exhaust path b provided in between and an air permeable bulkhead 30.
With the hot air guide path c provided between 0 and 10, a shell particle flow downward path a whose upper end side communicates with the bottom of the shell tank 2 is formed between the opposing air permeable partition walls 20 and 30, A shell guide wall 6 is installed at the inlet of the lower grain flow passage a to separate the shell grains flowing into the lower shell flow passage a to the left and right and join them again. The shell grain ventilation drying device is characterized in that the inner cavity of the shell grain guide wall 6 is communicated with a hot air generating device 7 via a communication duct 61 provided on the outer surface of the shell tank 2 in the front-rear direction.