JPS5825264Y2 - Dust removal device for grain ventilation drying machine - Google Patents

Description

[Detailed description of the invention] This invention uses the passage from the throwing opening of the elevator installed in parallel to the grain ventilation dryer into the machine or to the circulation gutter for circulation as a grain supply hopper room, and the upper part of the grain supply hopper room. A ventilation dryer in which a grain dust separation chamber communicating with the hopper chamber is placed in the hopper chamber, and the grain dust separation chamber is connected to a suction port of a jumping grain hoist or a suction exhaust machine. This article relates to a dust removal device.

In ventilation dryers, a large amount of dust is generated from grain particles during drying, so removing dust has become an extremely important issue from a sanitary perspective.

The grain supply hopper room near the throwing port of the elevator is thought to be one of the best places to remove dust, and conventional methods have been attempted in which this hopper room is connected to the suction port of the vault grain hoist or the suction exhaust fan. It is being

However, since the suction power of the jumping grain hoist and the suction exhaust machine is quite strong, simply connecting it with a cylindrical object as in No. 52143371 would not only collect dust but also grains. In order to prevent this, the cylinder must be extended to a height where the grains cannot be sucked up, and the drawback remains that the taller the cylinder is, the weaker the dust suction effect becomes.

This invention was devised with the aim of eliminating the above-mentioned drawbacks.At least the upper surface of the inner circumferential wall has a curved shape, and the front and rear walls are flat grain dust separation chambers. The path leading to the circulation gutter that runs horizontally in the front-rear direction at the top of the dryer near the throwing port is the grain supply hopper chamber, which is connected to the top wall of the hopper chamber and placed on the hopper chamber. To drill an exhaust port in the flat surface of one side wall of the particulate/dust separation chamber, which communicates with the suction port of the suction machine or the jumper compartment,
By specifying the position of this perforation at the left-right eccentric position of the flat wall, and by determining the relationship between this left-right eccentric distance and the diameter of the intake port to this separation chamber, it is possible to separate the hole very close to the hopper chamber. It completely separates the paddy and dust without any struggle, the paddy is collected by sliding on a curved surface, and only the dust can be discharged along with the suction wind, thereby providing a high-performance and compact dust removal device. This is what I did.

Hereinafter, embodiments of the present invention will be explained in detail based on illustrative drawings.

FIG. 1 shows the main parts of a ventilation dryer 1 equipped with the device of the present invention.

2 is an elevator, which is a grain collecting room at the bottom of the dryer (not shown)
The grains from are lifted up by a bucket conveyor 3,
The grain is dumped from the dumping port into the grain supply hopper chamber 4, which is a circulation path to the dryer.

The grain supply hopper chamber 4 is branched into a circulation gutter 5 communicating with a grain distributing device 8 having a grain distributing screw 8' and a discharge gutter 6 communicating with a jumping grain lifting machine 9. It is designed to selectively circulate and discharge grains through operation.

The jump grain lifting machine 9 has a blade wheel 11 mounted on a shaft within a blade wheel chamber 10, and the tip of the discharge tube 12 has a dust exhaust tube 14 and a grain discharge tube 15 which can be switched by a dust and grain exhaust switching plate 13. It is necessary to branch out into two.

Reference numeral 16 denotes a flat grain dust separation chamber installed above the grain supply hopper chamber 4, and has a curved upper peripheral wall.

The separation chamber 16 has an exhaust port 1 on a flat wall 17 on the back side thereof.
8 is eccentrically bored in the direction of the packet conveyor 3 of the elevator 2 so that the distance 11, 12 from the exhaust port 18 to the peripheral wall is 11>l2>0 as shown in FIG. Furthermore, an intake port 19 with a diameter of 13 is placed below the side where the distance from the exhaust port 18 to the peripheral wall is 11≧1.
It is set so that it becomes 3.

Reference numeral 20 denotes an intake port bored into the earthen wall of the hopper chamber 4, which communicates with the intake port 19 of the separation chamber 16;
Further, 21 is a dust suction cylinder that communicates the exhaust port 18 of the separation chamber 16 with the suction port 22 of the jump grain lifting machine 9.

Note that FIG. 4 shows another embodiment, in which the exhaust port 1
8 is communicated with a suction port 24 of a suction/exhaust fan 23 through a dust suction tube 21.

Since the present invention has the above-mentioned structure, when the grains are to be discharged outside the machine after drying, the circulation gutter 5 and the dust exhaust tube 14 are closed and the discharge gutter 6 and the grain exhaust tube 15 are opened. If you set the circulation discharge switching plate 7 and the dust/particle removal switching plate 13 to
The grains in the dryer are transported through a grain collecting room (not shown) → packet conveyor 3 → grain supply hopper room 4 → discharge gutter 6 → jumping grain lifting machine 9
→ Discharge pipe 12 → Particle discharge pipe 15 is the route in which the particles are discharged to the outside of the machine.

On the other hand, during circulation drying, if the circulation discharge switching plate 7 and the dust/grain removal switching plate 13 are operated and set in the opposite manner to the above, the grains are transferred from the drying room (not shown) to the grain collecting room (not shown). ) Packet conveyor 3 → grain supply hopper room 4 → circulation gutter 5 → grain distribution device 8 →
It is circulated and dried in a drying chamber (not shown).

During this circulation drying process, when the grains are discharged from the packet conveyor 3 to the grain supply hopper chamber 4, a large amount of dust is separated from the grains and accumulates in the hopper chamber 4. 20 is bored, and the suction port 22 of the jump grain lifting machine 9 is communicated with the suction port 20, so that the dust in the hopper chamber 4 is sucked into the jump grain lifting machine 9 and the impeller 11
The dust is forcibly discharged from the dust exhaust pipe 14 to the outside of the machine.

In the other embodiment shown in FIG. 4, the suction port 20 on the upper surface of the hopper chamber 4 and the suction port 24 of the suction/exhaust fan 23 are communicated with each other, so that the operation is similar.

The embodiment shown in FIG. 4 shows a case where an existing suction/exhaust machine installed for the purpose of discharging hot air after drying is used as the suction/exhaust machine. The wind fan is not limited to these; for example, a suction fan exclusively for dust removal may be installed near the separation chamber 16, or a suction fan used for other purposes may also be installed. It's also good.

As mentioned above, the impeller 11 of the jump grain lifting machine 9 also has the suction exhaust machine 2.
3 also exerts a considerable suction force, and prevents the grains from getting stuck in the distribution screw 8' and scattering toward the intake port 20 when being dumped from the packet conveyor 3 into the hopper chamber 4. It will be inhaled along with the dust.

In conventional systems in which the hopper room and the suction port of the jump grain lifting machine or the suction port of the suction exhaust fan are connected through a simple cylinder, this cylinder should be raised sufficiently to weaken the suction force exerted on the hopper room. Since this device is designed to prevent grains from being sucked in, the dust suction effect is inevitably weakened and the device itself becomes large.

In contrast, the device of the present invention provides the grain/dust separation chamber 16 having the above-described structure above the hopper chamber 4, so that the grains flying into the intake port 20 are also collected together with the dust once in the separation chamber 6.
The grains, which are heavier than the dust, are sucked into the separation chamber 6.
is returned to the hopper chamber 4 by rotating it along the peripheral wall of the hopper chamber 4,
Dust that is hardly mixed with grains is discharged from the exhaust port 18.

To explain in more detail, the flat wall 17 of the separation chamber 16 has l,>l2>0.11>1 as shown in FIG.
Since the eccentric exhaust port 18 is provided at a position such that the separation chamber 1 is
The wind entering 6 is accelerated as it passes through the narrow intake port 19 from the wide hopper chamber 4, and continues to ascend and turn along the curved casing of the separation chamber 16 until it reaches the top of the curved casing, and when the upward momentum weakens, it is exhausted. It is discharged from the port 18.

The wind and dust stop swirling and are discharged from the exhaust port 18, but
The heavy grains mixed in the wind continue to swirl along the curved casing, and the heavier the grains, the more they turn around due to centrifugal force, make one revolution, and return to the hopper chamber 4 through the intake port 19 again.

Since the returning grains accelerate and fall down the slope of the curved casing due to their own weight, they are not caught in the wind from the inlet 19 toward the separation chamber 16.

At this time, if l 1 < 73, the wind entering from the intake port 19 will not rise along the curved casing, but will be discharged straight toward the exhaust port 18, and the mixed grains will also flow into the peripheral wall of the curved casing. without turning along the intake port 19
The air moves in a straight line towards the exhaust port 18 along with the wind, and is exhausted.

Therefore, the wind entering the separation chamber 16 cannot initially cause the grain to swirl upward along the circumferential wall of the curved casing.

Even at the time of 12-0, the grains that have ascended and swirled along the peripheral wall of the curved casing are discharged together with the wind.

Therefore, it must be 12>0. Furthermore, the wind that has entered the separation chamber 16 swirls along the curved casing and is sucked into the exhaust port 18 near the top of the curve, but if l 1 < 12, the wind also swirls along the peripheral wall of the curved casing. If this continues, the exhaust from the exhaust port 18 becomes defective, and the wind that circles along the peripheral wall collides with the wind coming from the hopper room 4 at the intake port 19, causing the direction and force of the incoming wind to deteriorate. This results in a situation where not only the suction and dust removal ability at the exhaust port 18 is inferior, but also mixed grains are discharged outside the machine.

In summary, in the present invention, the path leading to the circulation gutter that extends horizontally in the front and back direction of the upper part of the dryer near the elevating and lowering throwing ports installed in parallel with the dryer is made into a grain supply hopper chamber, and the upper part of the grain supply hopper chamber 4 is A flat grain/dust separation chamber 16 having at least a curved upper surface of the inner circumferential wall is provided, and an exhaust port 18 is provided at the horizontal eccentric position of the flat wall 17 of the separation chamber 16. The distance to the left and right inner peripheral walls of the separation chamber 16 is 11>12>O, and the distance to the inner peripheral wall is 11
One intake port with a diameter of 13 is placed below the side where 11≧
13 so that the intake port 19 and the upper wall of the grain supply hopper chamber 4 communicate with each other, and the exhaust port 1
8 is connected to the suction port 22 of the impeller 11 of the road grain lifting machine 9 or the suction port 24 of the suction/exhaust fan 23, the grains and dust are swirled into the separation chamber 16, and the centrifugal force is utilized. The grains having a large weight can be rotated along the peripheral wall of the separation chamber 16 and returned to the hopper chamber 4, and only the dust can be sucked and discharged from the exhaust port 18. Since the separation chamber 16 can be placed very close to the hopper chamber 4, the device itself can be made smaller in size compared to conventional ones.

[Brief explanation of drawings]

The drawings show a ventilation dryer equipped with the device of the present invention, in which Fig. 1 is a front view showing the main parts longitudinally, Fig. 2 is an enlarged front view of the main parts of Fig. 1, and Fig. 3 The figure is a perspective view of the main part.
The figure is a side view of a main part showing another embodiment of the present invention, FIG. 5 is an enlarged front view of the main part, and FIG. 6 is a front view showing still another embodiment. In the figure, 1... Ventilation dryer, 2... Elevator, 3... Packet conveyor, 4...
Supply hopper room, 5... Circulation gutter, 6...
・Discharge gutter, 7... Circulation discharge switching plate, 9...
...Jump grain lifting machine, 10...Blade wheel room, 11...
...Wing wheel, 12...Discharge pipe, 13...
・Dust discharge switching plate, 14...Dust exhaust pipe, 15...
... Grain discharge tube 16 ... Grain dust separation chamber, 17
...Flat wall, 18...Exhaust port, 19.
...Intake port, 20...Intake port, 21...
...Dust suction, 22...Suction port, 23...
...Suction exhaust fan.

Claims (1)

[Scope of utility model registration request] The route from the throwing port of the elevator 2 installed in parallel to the grain ventilation dryer 1 to the circulation gutter 5 for feeding into the machine body or for circulation is the grain supply hopper chamber 4, and at least an internal space is provided above the grain supply hopper chamber 4. A flat grain/dust separation chamber 16 having a curved upper surface of the peripheral wall is provided, and an exhaust port 18 is provided at an eccentric position on the left and right sides of the flat wall of the separation chamber 16. The distance to the left and right inner peripheral walls of 16 is 1
1>12>0, and an intake port 19 with a diameter of 13 is provided below the side where the distance to the inner peripheral wall is 11 so that 11≧13, and the intake port 19 and the grain supply hopper chamber 4 The exhaust port 18 is connected to the inside of the upper wall of the
A dust removal device for a grain ventilation dryer, characterized in that the dust removal device is connected to a suction port 22 of a blade wheel chamber of a jump grain lifting machine 9 or a suction port 24 of a suction exhaust device 23.