JPH07315482A - Powder-grain fluidizer - Google Patents

Abstract

PURPOSE:To enhance fluidizing properties of power-grain for a long time at a high efficiency in a powder-grain fluidizer. CONSTITUTION:While an agitator 3 disposed in a space in which powder-grain is accumulated is rotated by a motor 2 disposed out of the space, pressurized gas supplied from a pressurized gas supply means 7 is jetted out through a gas passage 9 having openings spaced from an axis of a rotating shaft of the agitator 3. Therefore, an agitating action of the agitator 3 and a fluidization enhancing action obtained by jetting the pressurized air can synergistically act on the powder-grain. The openings 10 of the gas passage 9 are automatically cleaned by revolving, thereby being prevented from clogging for a long term.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular material fluidizing device for preventing, for example, a bridging phenomenon in a hopper and accumulation of dust in a pipeline. The present invention relates to a fluidizing apparatus for powder and granules capable of increasing the temperature.

[0002]

2. Description of the Related Art For example, in a hopper for supplying a granular material, a chute, a pipe for conveying the granular material, the movement of the granular material is blocked by the aggregation of the granular material,
In some cases, the supply or conveyance of powder or granules may become insufficient or impossible.

Further, in a pipeline, dust may be accumulated on the inner surface of the pipe, narrowing the cross-sectional area of the pipe and making it impossible to sufficiently convey a fluid substance or the like.

[0004] For example, in a hopper for supplying powdery particles, phenomena such as bridges, arching, ratholes, and clogging occur due to the agglomeration of powdery particles. To prevent such phenomena, a device called a bridge breaker is used. Is provided. This bridge breaker is a type that gives vibration or impact to the wall surface of the hopper (wall surface vibration / impact type), a type that supplies pressurized gas into the hopper (aeration type), a part or all of the hopper. Vibration type (Direct vibration type)
It is categorized into the one that stirs the powder and granules inside (stirring type).

Among these, wall vibration / shock type,
Direct vibration type and other types that give vibration to the granular material are best suited for eliminating adhesion of the granular material to the wall surface and elimination of ratholes, but depending on the type of granular material, the granular material can be vibrated by vibration. Has a drawback that the bulk density is increased, and bridges, archings, and clogging are stronger, and the direct vibration type also has a drawback that the device becomes larger.

As the aeration type,
A type that destroys the agglomeration of powder and granules by the impact force of the pressurized gas (air blast type) and a part of the wall surface of the hopper is made of a perforated plate, and the pressurized gas is blown into the hopper from this perforated plate. There is a type (aeration type) that lowers the bulk density of the granules and increases the fluidity.

In the case of the air blast type, the impact force of the pressurized gas is weakened at a position away from the ejection port of the pressurized gas, and depending on the type of the granular material, the pressure increases the bulk density of the granular material. On the contrary, there is a drawback that the bridge, arching, and clogging become strong. Further, since the perforated plate is fixed in the aeration type, there is a problem that the perforated plate is apt to be clogged and the function is lost within a relatively short period of time.

The stirring type generally comprises a motor arranged outside the space in which the powder and granules are accumulated, and an agitator arranged in the space and driven by the motor. Stirring with agitator mechanically destroys the agglomeration of the powder and granules, so that the above phenomenon can be eliminated without increasing the bulk density of the powder and granules.

[0009]

However, in the stirring type bridge breaker, although it is possible to recover the fluidity lost by the granular material to some extent by destroying the aggregation of the granular material, the granular material can be recovered. It is not possible to increase the bulk density and increase the fluidity, and dissatisfaction may remain in solving the above phenomenon.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a granular material fluidizing device capable of efficiently improving the fluidity of the granular material over a long period of time. To do.

[0011]

Means for Solving the Problems In order to achieve the above object, a fluidizing apparatus for powder and granules according to the present invention has a motor arranged outside the space where the powder and granules are accumulated, and a motor disposed inside the space. In the powder and granular material fluidizing device including an agitator driven by the motor, a gas passage that is provided in the agitator and opens in the space at a position apart from the rotation axis of the agitator, A means for supplying a pressurized gas from outside the space is provided in the gas passage.

[0012]

In the present invention, the pressurized gas supplied from the means for supplying the pressurized gas is jetted out through the gas passage into the space where the powdery particles are accumulated, whereby the powdery particles around the agitator are discharged. The bulk density of the body is reduced and the fluidity is increased. Since the agitator agitates the powder or granular material with reduced fluidity while rotating, the agitation of the agitator and the aeration enhances the fluidity synergistically, and the fluidity of the powder or granular material is significantly improved. Is increased.

Further, since the gas passage is opened in the space at a position away from the rotation axis of the agitator, the opening also swirls as the agitator rotates, and the flow of aeration ejected from the opening. Also swirls, and the surrounding powder and granules also flow efficiently, making it difficult to clog for a long period of time.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 is an application of the present invention to a bridge breaker of a hopper, which is fixed to the outside of an inclined wall member 1 of the hopper. Motor 2 and
The hopper is provided with an agitator 3 which is arranged in a space in which the powdery particles are accumulated and which is driven by the motor 2.

The motor 2 is mounted at a right angle to the surface of the wall member 1 via the mounting frame 4, and the output shaft 5 of the motor 2 and the agitator 3 are rotatably inserted in the mounting frame 4. Are linked by.

The agitator 3 has a central boss 7 and two blades 8 extending from the central boss 7 in directions opposite to each other, and a gas passage 9 extends from the tip of each blade 8 to the central boss 7. Has been formed.

The gas passage 9 may be opened in the hopper at a position distant from the rotation axis of the agitator 3, and can be opened in the base end portion or the intermediate portion of each blade 8. However, in this embodiment, the gas passage 9 is opened at the tip of the blade 8 having a large resistance to the rotation of the agitator 3.

Although the opening 10 of the gas passage 9 is a single opening in this embodiment, a plurality of openings are provided in each blade 9, or a part or all of the surface of each blade 9 is made a porous surface. ,
Innumerable openings may be provided.

Further, the opening 10 may be opened toward the radial direction of the agitator 3 at the tip end surface of each blade 8 or toward the wall member 1, but in this embodiment, the agitator 3 is used. In order to reduce the bulk density of the powder or granules in the hopper as wide as possible, the opening is made in the direction opposite to the wall member 1.

When the opening 10 is opened toward the wall member 1, the powder particles attached to the wall member 1 are blown off by the jet pressure of the pressurized gas to attach the powder particles to the wall member 1. Also, it is possible to prevent accumulation.

A peripheral groove 11 is formed on the peripheral surface of the intermediate portion of the connecting shaft 6 near the motor 2. Inside the connecting shaft 6, a ventilation path 1 is formed from the peripheral groove 11 to the end face on the agitator 3 side.
2 is provided to communicate with the gas passage 9 of the agitator 3 fixed to the tip of the connecting shaft 6.

At the inner peripheral portion of the mounting frame 4, the peripheral groove 11 is formed.
A pair of O-rings 13 that seal between the inner peripheral surface of the mounting frame 4 and the connection shaft 6 on both sides of are fitted in, and a concave groove 14 is provided between both O-rings 13. The groove 14 is formed on the peripheral wall 1 of the mounting frame 4.
5, an external pressurized gas supply means (here, the supply pipe of the terminal and the plug hole 1
Only the plug that connects to 6 is shown. ) 17 is connected.

The pressurized gas supplied by the pressurized air supply means 17 may be appropriately selected according to the type of powder or granular material handled in the hopper. For example, in the case of powder or granular material that can be handled in the atmosphere. Pressurized air may be supplied to the. In addition, dehumidified pressurized air may be supplied to the powder or granules that agglomerate or react with moisture in the atmosphere, and the powder or granules that agglomerate or react with oxygen in the air may be supplied. For this, an inert gas such as pressurized nitrogen may be supplied.

In this powder and granular material fluidizing device, the pressurized gas supplied from the pressurized gas supply means 17 passes through the plug hole 16, the concave groove 14, the peripheral groove 11, the ventilation passage 12 and the gas passage 9 in the hopper. Are jetted out to, and as a result, the bulk density of the granular material around the agitator 3 is reduced, and the fluidity is increased. Since the agitator 3 agitates the powder or granular material with reduced fluidity while the agitator 3 rotates, the agitation by the rotation of the blade 8 and the fluidity improvement by aeration act synergistically, and the powder or granular material is remarkably efficient. It is possible to enhance the fluidity of the powder, and efficiently prevent various phenomena such as bridges due to the aggregation of the powder and granules.

Since the gas passage 9 is opened in the space at a position away from the rotation axis of the agitator 3, the opening 10 is also swirled as the agitator 3 rotates, and the gas is ejected from the opening. The aeration flow that occurs also swirls and the surrounding powder and granules also flow efficiently, making it difficult to clog for a long period of time and maintaining the effect of preventing the various phenomena due to the agglomeration of powder and granules for a long period of time. You can do it.

In another embodiment of the present invention shown in FIG. 3, the motor 22 and the agitator 23 are horizontally mounted on the inclined wall member 21 of the hopper. This agitator 23
Is four blades 2 arranged in two stages in the axial direction.
8, a gas passage 29 is formed from the central boss 27 to the tip of each blade 28, and the tip of this gas passage 29 is opened in the direction opposite to the wall member 21.

The other constitution, operation and effect of this embodiment are the same as those of the above-mentioned one embodiment except that the injection area of the stirring and pressurized gas is enlarged, so that the duplication is avoided. These explanations are omitted.

The structure of the agitators 3 and 23 is not particularly limited to the above-mentioned examples, and for example, as shown in FIG.
A pair of blades 38 made of a pipe bent in an arc shape,
A connecting pipe 40 connecting the blades 38 so as to be inclined with respect to the central boss 37, and a gas passage 39 formed in the central boss 37 and in the connecting pipe 40 has a radial direction at the center of each blade 8. As shown in FIG. 5, the agitator 33 that is opened in the vertical direction is provided with four strip-shaped blades 48 at appropriate intervals in the axial direction of the central boss 47, and the extending direction is 1 in order.
It is possible to use an agitator 43 or the like, which is fixed to the central boss 47 so as to differ by 80 °, and a gas passage 49 is provided inside the central boss 47 and each blade 48.

A powdery / fluidized body fluidizing apparatus according to another embodiment of the present invention shown in FIG. 6 is obtained by applying the present invention to a dust accumulation preventing apparatus for a pipeline, and is concentrically provided in a flue 50. The agitator 53 arranged is provided, and the agitator 53 is rotated around the axis of the flue 50 by a motor (not shown).

The agitator 53 has a central boss 57 and a coil-shaped pipe 58 partially wound around the central boss 57, and a gas passage 59 is formed in the central boss 57 and the pipe 58. Gas passages 59 are opened outward in the radial direction at intervals of 180 ° on the outer peripheral surface of the pipe 58, and pressure is applied through the respective openings of the gas passages 59 of the rotating agitator 53 in the same manner as in the above examples. The pressurized gas supplied by the gas supply means is ejected into the flue 50.

The jetting of the pressurized gas and the rotation of the agitator 53 enhance the fluidity of the dust in the pipeline 50, and prevent the dust from adhering to and depositing on the inner surface of the pipeline 50 for a long period of time.

[0032]

As described above, according to the present invention, the gas passage that is provided in the agitator and opens into the space at a position away from the rotation axis of the agitator, and the space in the gas passage. Since means for supplying the pressurized gas from the outside is provided, while the agitator is rotated, the powder and granules are accumulated through the gas passage through which the pressurized air is supplied from the means for supplying the pressurized gas into the agitator. It can be ejected into space.

Therefore, the jetting of the pressurized air lowers the bulk density of the powder or granules around the agitator, and the agitator rotates to stir the powder or granules in a state where the fluidity is increased. And the improvement of fluidity by aeration can be synergistically improved to improve the fluidity of the powder or granular material significantly efficiently, and efficiently prevent various phenomena due to aggregation of the powder or granular material such as bridges. Become.

Further, since the gas passage is opened in the space at a position away from the rotation axis of the agitator, the opening also swirls with the rotation of the agitator, and the flow of aeration ejected from the opening. By swirling, and the surrounding powder and granules also efficiently flow, clogging becomes difficult for a long period of time, and the fluidity of the jet fluid can be efficiently improved for a long period of time.

[Brief description of drawings]

FIG. 1 is a side view with a part cut away of an embodiment of the present invention.

FIG. 2 is a side view of an embodiment of the present invention.

FIG. 3 is a side view of another embodiment of the present invention.

FIG. 4 is a side view of another agitator of the present invention.

FIG. 5 is a side view of another agitator according to the present invention.

FIG. 6 is a side view of another embodiment of the present invention.

[Explanation of symbols]

 2 Motor 3 Agitator 9 Gas Passage 17 Pressurized Gas Supplying Means 22 Motor 23 Agitator 29 Gas Passage 33 Agitator 39 Gas Passage 43 Agitator 49 Gas Passage 53 Agitator 59 Agitator

Claims (1)

[Claims] 1. A fluidizing apparatus for a granular material, comprising: a motor arranged outside the space where the granular material is accumulated; and an agitator arranged inside the space and driven by the motor. A gas passage that is provided in the space and opens in the space at a position away from the rotation axis of the agitator;
A means for fluidizing a granular material, characterized in that means for supplying a pressurized gas from outside the space is provided in the gas passage.