JP2001341839A - Powder and granular material collector, and powder and granular material drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably discharge the flake-like lightweight powder and granular material stored in a tank 3 of a powder and granular material collector 2. SOLUTION: A first selector valve 31 is switched to a state B, a blower 3 is changed over to a working state at a high level, and an opening/closing lid 12 is opened. As a result, the gas is ejected from a gas outlet 10 in the reverse direction, and the lightweight powder and granular material stored in a filter member 14 is fed to a tank body 22 by the ejected gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular material collector and a granular material drying device.

[0002]

2. Description of the Related Art Heretofore, the following types are known as this type of particulate collector. A tank having a top wall on which a powder inlet is formed, a tapered lower portion having a downwardly tapering portion having a powder outlet at a lower portion, and further having a gas outlet on a side peripheral wall; and a gas outlet in the tank. And a filter member which is provided so as to define the particulate material inlet and the particulate material outlet, does not allow the passage of the particulate material of the set size, and allows the passage of the gas, and the particulate material outlet of the tank. Is known, which has an opening / closing lid provided in the opening.

[0003]

The operation of the prior art will be described below. A powder material storage source (having a gas inlet) in which the powder is stored is connected to the powder inlet, and a suction port of a blower is connected to the gas outlet. If the blower is actuated after closing the granule outlet, the following operation is performed. Since the pressure inside the tank becomes negative,
The powder and granules flow into the tank together with the gas from the powder inlet,
The gas exits the gas outlet, and the powder is stored in the tank. After stopping the blower, the opening and closing lid is opened to discharge the powder in the tank from the powder outlet.

[0004]

Disadvantages of the prior art The above-mentioned conventional particulate collector has the following disadvantages. Virgin raw materials such as heavy pellets (generally having a large apparent density) can be discharged by their own weight by opening and closing the lid after being collected in the tank of the above-mentioned conventional particulate collector. A light-weight particulate material (in this specification, a light-weight particulate material means that in a gas flowing at a predetermined flow rate from bottom to top, the gas is sowed upward by the flow of the gas and does not fall under its own weight. Or a powder that is hard to fall.) (In general, the apparent density is small), the light-weight powder supplied into the tank from the powder inlet is the gas that flows toward the gas outlet. It is attached and accumulated on the surface of the filter member as it flows. After the light-weight particles have accumulated in the tank in a predetermined amount, even if the blower is stopped and the opening / closing lid is opened to discharge the light-weight particles, the light-weight particles adhere and accumulate on the surface of the filter. For this reason, there is a drawback in that the light-weight powder cannot be reliably discharged under its own weight. In addition, since the reused raw material crushed to reuse the used synthetic resin product is often a light powder, it promotes the reuse of the used synthetic resin product from the viewpoint of global environmental protection. In order to
The elimination of the above drawbacks is essential.

[0005]

The present invention employs the following means to solve the above-mentioned drawbacks. According to the first aspect of the present invention, there is provided a tank in which a lower portion is formed as a powder outlet, a powder inlet is formed in a side peripheral wall, and a gas outlet is formed in an upper portion or a top wall of the side peripheral wall; An outlet is provided so as to define the granular material inlet and the granular material outlet, and has a tapered peripheral wall extending downward,
The filter has a filter member that does not allow passage of a particulate material of a set size but allows the passage of gas, and an opening / closing lid provided at the outlet of the granular material in the tank. According to a second aspect of the present invention, there is provided a granular material drying apparatus using the granular material collector according to the first aspect of the present invention, which is provided below the granular material collector and the granular material collector. A drying tank, wherein the particulate collector has a powder outlet at a lower portion and a powder inlet formed at a side peripheral wall, and a gas outlet at an upper portion or a top wall of the side peripheral wall. Formed in the tank, and a gas outlet provided in the tank so as to define the powder inlet and the powder outlet, and having a tapered peripheral wall extending downward and passing the powder of a predetermined size. Has a filter member that does not allow the passage of gas and an opening / closing lid that is provided at the outlet of the granular material of the tank, and the drying tank is provided with the granular material of the tank of the granular material collector. The upper part is directly or indirectly connected to the outlet, the lower part is the outlet, and the upper part or the top part of the side wall A tank body having a gas outlet is formed in, located granular material outlet above the tank body, those having a gas ejection stereoscopic nozzle having a plurality of drying gas outlet. The invention according to claim 3 is characterized in that, when a discharge port of a jet pump is connected to a powder material inlet of a tank of the powder material collector and the powder material is stored in the tank of the powder material collector, 3. The apparatus according to claim 2, wherein a gas from a discharge port of a blower for creating a negative pressure in the tank of the collector is guided to a compressed gas inlet of the jet pump via a switching valve.

[0006]

According to the present invention, the following effects can be obtained by the above configuration. According to the first aspect of the present invention, the light-weight powder is put into the tank from the powder inlet, and the gas is discharged from the upper gas outlet, so that the light powder is spread downward by the gas flow. The upper part of the filter member is moved upward by sequentially moving the upper part of the filter member having the tapered peripheral wall, so that the lower part of the lighter particle is denser toward the upper part and sparser toward the lower part. As described in the embodiment, the light-weight particles accumulated in the filter member due to the synergistic effect of the tendency that the filter member that separates the light-weight particles has a tapered peripheral wall that expands downwards By pushing the body downward with gas, the powder can be reliably discharged from the outlet. According to the second aspect of the present invention, after the light-weight powder stored in the tank of the powder collector is put into the tank body of the lower drying tank, it is ejected from the gas ejection three-dimensional nozzle in the tank body. The wet gas existing between the light and granular materials is successively discharged from the gas outlet by the dried gas to be replaced, and the inside of the tank body can be replaced with the dry gas, so that the drying of the light and granular material is ensured. You can do it. According to the third aspect of the present invention, when the light and granular material is stored in the tank of the granular material collector, the exhaust of the blower is used for operating the jet pump, so that the blower can be effectively used. .

[0007]

Embodiments of the present invention will be described below. The tank 3 of the granular material collector 2 has a cylindrical side peripheral wall 4.
And a top wall 5 provided above the side peripheral wall 4, and a tapered cylinder 6 which is provided at an intermediate portion in the height direction of the side peripheral wall 4 and which tapers downward.

A granular material inlet 8 is formed above the tapered cylinder 6 of the side peripheral wall 4, and the granular material inlet 8 is connected to an open / close valve 9, in this embodiment, an inner surface of the side peripheral wall 4 in a vertical direction. An on-off valve 9 composed of a check valve which is swingably openable and closable is provided. The on-off valve 9 swings upward and opens when the inside of the tank 3 (a space surrounded by the side peripheral wall 4, the top wall 5, and the tapered cylinder 6; the same applies hereinafter) becomes negative pressure. If it is not a negative pressure, it becomes drooping and closes the granular material inlet 8.

A gas outlet 10 is formed in the top wall 5, and a lower end opening of the tapered cylinder 6 serves as a granular material outlet 11. The granular material outlet 11 is provided with a pivot 13 having a horizontal axis.
The opening / closing lid 12 is configured to be freely openable and closable about the center of the screen. The opening / closing lid 12 is operated by an operating device (not shown).

In the tank 3, the gas outlet 10 is defined as the powder inlet 8 and the powder outlet 11, so that the passage of the gas of the set size is not allowed and the passage of the gas is allowed. A filter member 14 is provided, which has a tapered peripheral wall 15 that extends downward.

A drying tank 16 is provided below the powder collector 2. In the drying tank 16, the granular material inlet 17 formed in the top wall 20 is connected to the lower end of the side peripheral wall 4, the lower part is formed as the granular material outlet 18, and the upper part of the side peripheral wall 19 or the top wall 20. In this embodiment, a tank main body 22 having a gas outlet 21 formed in the upper portion of the side peripheral wall 19 and a large number of dry gas jet ports (not shown) located above the granular material outlet 18 of the tank main body 22. ) Gas jetting three-dimensional nozzle 24
And The gas ejection three-dimensional nozzle 24 is located at a position suitable for preventing a bridging phenomenon in the tank body 22. This three-dimensional gas jet nozzle 24 is
It is known in JP-A-10-310252 and the like. The gas ejection three-dimensional nozzle 24 is attached to the tank main body 22 by a conduit 23.

The inlet of a molding machine 26 is connected to a powder outlet 18 of the tank body 22 via a connection tube 25 having a rectangular horizontal section. A pair of left and right (in the left-right direction in FIG. 1) rocking plates 27 are accommodated in the connection tube 25 such that the distance between the lower ends is slightly larger than the distance between the upper ends. The upper end is attached to the upper part of the connection tube 25 via an elastic material (not shown), a predetermined gap is provided between the left and right walls of the connection tube 25, and the front and rear walls (the front and rear Is a direction perpendicular to the plane of the paper of FIG. 1). There is only a small gap that allows the swinging plate 27 to swing. Dry gas inlets 28 are formed on the left and right walls of the connection tube 25. The oscillating plate 27 is slightly oscillated (vibrated) in the left-right direction by the dry gas intermittently ejected from the drying gas inlet 28, and the oscillating plate 27 moves downward between the oscillating plates 27. It is designed so that the light-weight powder and the like that move to the area do not cause a bridge phenomenon.

The gas outlet 10 of the tank 3 is connected to a blower 33 through a conduit 32 having a first switching valve 31 on the way.
Is connected to the suction port 34. The first switching valve 31 has four ports 31a to 31d.
a state where the port 31c is connected to the port 31b and the port 31c and the port 31d (hereinafter referred to as an A state), and a state where the port 31c is connected to the port 31a and the port 31d and the port 31b are connected (hereinafter a B state). ). The conduit 32 is connected to the port 31a and the port 31b. The discharge port 35 of the blower 33 is connected to a port 31c of the first switching valve 31 via a conduit 37.

The port 31d of the first switching valve 31 is connected to a port 41b of the second switching valve 41 via a conduit 38. The second switching valve 41 has four ports 41a-4
1d, and the port 41b and the port 41a are connected and the port 41d and the port 41c are connected (hereinafter, referred to as C state) depending on the position of the internal rotary valve body.
And a state in which the port 41d is connected to the port 41a and the port 41b is connected to the port 41c (hereinafter, referred to as a D state).

The port 41a of the second switching valve 41 is open to the outside air via a conduit 42 and a filter 43.
On the other hand, the port 41c of the second switching valve 41 is open to the outside air via a conduit 46 having an on-off valve 45 and a filter 47.

A conduit 49 is connected to a conduit 46 between the port 41c and the on-off valve 45. The conduit 49 is connected to a compressed gas inlet 51 of a jet pump 50. A discharge port 53 of the jet pump 50 is connected to a powder inlet 8 via a conduit 54, and a suction port 52 of the jet pump 50 is connected to a powder storage source in which the powder is stored via a conduit 55. (Not shown) (having a gas inlet).

The dry gas inlet 28 is provided with an on-off valve 5
7 is connected to the outlet of a gas dryer 59 containing a blower through a conduit 58.

The conduit 23 connected to the three-dimensional gas jet nozzle 24 is connected to a conduit 58 between an on-off valve 57 and a gas dryer 59 via a conduit 62 having an on-off valve 61 on the way. The gas outlet 21 is connected to a port 41 d of the second switching valve 41 via a conduit 64.

[0019]

Next, the operation of the embodiment of the present invention will be described.

[Standby State] First, a standby state before the lightweight powdery material is transported to the tank 3 will be described. The first switching valve 31 is in the A state, the second switching valve 41 is in the C state,
The on-off valve 45 is open, and the on-off lid 12 is closed. In addition, the blower 33 is in a low-level operating state (a state in which the inside of the tank 3 is not set to a negative pressure so as to suck a light-weight granular material). The on-off valve 61 and the on-off valve 57 are always opened and closed at predetermined time intervals, and the gas dryer 59 is always operating.

In this state, the gas in the tank 3 is discharged from the filter 43 through the second switching valve 41 in the C state by the operation of the blower 33. Then, a small amount of the gas exhausted from the gas outlet 21 enters the tank 3 through the second switching valve 41, the conduit 49, and the conduit 54 in the C state, opening the on-off valve 9 and then into the tank 3.

The light-weight particles in the tank main body 22 of the drying tank 16 are supplied from the gas jetting three-dimensional nozzle 24 into the tank main body 22, from the dry gas inlet 28 below the rocking plate 27, to the rocking plate 2.
7 and dried by the dry gas intermittently jetted into the tank body 22, and the damp gas existing between the light and granular materials by the dry gas is discharged from the gas outlet 21 and the tank body 22. The interior continues to be filled with fresh dry gas. Gas ejection solid nozzle 24 and dry gas inlet 2
The dry gas spouted from 8 also has the effect of preventing the bridging phenomenon of the light and granular material. Most of the gas exhausted from the gas outlet 21 is discharged to the outside air from the filter 47 via the second switching valve 41 in the C state. As described above, a small amount of the gas exhausted from the gas outlet 21 enters the tank 3 via the conduit 49 and the conduit 54.

[Transportation] The transportation of the lightweight powder to the tank 3 will be described. The second switching valve 41 changes to the D state,
The on-off valve 45 closes. Further, the blower 33 changes to a high-level operation state (a state in which the inside of the tank 3 is set to a negative pressure so as to suck in a light-weight granular material). Others do not change state.
Since the second switching valve 41 changes to the D state, the exhaust air of the blower 33 is guided into the tank 3 via the second switching valve 41 and the jet pump 50. As a result, the inside of the tank 3 becomes negative pressure and the jet pump 50 sucks the light-weight granules of the granule storage source connected to the conduit 55, so that the light-weight granules are Transported within. Then, the light-weight particles are soaked on the upper part of the filter member 14 by the gas flow from the bottom to the upper part, where they are in close contact with each other, and are sequentially accumulated downward from the upper part of the filter member 14. Go. The gas outlet 21
Is discharged from the filter 43 to the outside air via the second switching valve 41 in the D state.

When a predetermined amount of the light and granular material accumulates in the filter member 14, the second switching valve 41, the on-off valve 45,
The blower 33 returns to the standby state.

[Supply to the tank body 22] Thereafter, the tank body 2
When the supply signal of the light-weight granular material to 2 is output, the first switching valve 3
When 1 changes to the B state, the blower 33 changes to the high-level operation state, and the opening / closing lid 12 opens. Others do not change state. As a result, gas is ejected from the gas outlet 10 in the reverse direction, and the ejected gas causes the light-weight powder particles accumulated in the filter member 14 to be sent to the tank body 22. Since the pressure in the tank 3 becomes high, the on-off valve 9 automatically closes. Outside air flows into the blower 33 via the filter 43. When the tank 3 becomes empty, the first switching valve 31, the blower 33, and the opening / closing lid 12 return to the standby state.

[0026]

[Modifications and the like] Modifications and the like will be described below. (1) Powders, granules, fine flakes, short fiber pieces,
Slivers and the like are included. (2) The opening / closing lid 12 may be like a horizontally moving shutter. (3) The filter member may be of any type as long as it does not allow the passage of powder having a predetermined size and allows the passage of gas. That is, the filter member includes a perforated plate and a net. (4) The horizontal cross-section of the tank 3, the filter member 14, the tank body 22, and the like is generally circular, but is not limited thereto, and may be, for example, rectangular. (5) The dry gas jetted into the tank body 22 from the gas jetting three-dimensional nozzle 24 and the dry gas inlet 28 may be an inert gas such as nitrogen gas. Further, the dry gas may be continuously ejected. (6) As a means for discharging the light-weight particles stored in the filter member 14, the filter member 14 or the tank 3 is vibrated vertically or vertically and horizontally to remove the light-weight particles from the filter member 14. For example, means for shaking off may be adopted. In this case, the on-off valve 9 is unnecessary. (7) Instead of the oscillating plate 27, a tapered cylinder extending downward may be accommodated in the connection cylinder 25.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 2 particulate collector 3 tank 4 side peripheral wall 5 top wall 6 tapered cylinder 8 particulate inlet 9 on / off valve 10 gas outlet 11 powder outlet 12 opening / closing lid 16 drying tank 17 powder inlet 18 powder outlet 19 Side peripheral wall 20 Top wall 21 Gas outlet 22 Tank main body 24 Gas jet solid nozzle

Claims (3)

[Claims] 1. A tank having a lower portion serving as a powder material outlet, a powder material inlet formed in a side peripheral wall, and a gas outlet formed in an upper portion or a top wall of the side peripheral wall, and a gas outlet in the tank. A filter member that is provided so as to define the granular material inlet and the granular material outlet and has a tapered peripheral wall that expands downward, and that does not allow the passage of a granular material of a set size and allows the passage of gas; A granular material collector having an opening / closing lid provided at a granular material outlet of a tank. 2. A powder collector, comprising: a powder collector; and a drying tank provided below the powder collector, wherein the powder collector has a powder outlet at a lower portion thereof. And a tank in which a powder inlet is formed in the side peripheral wall and a gas outlet is formed in an upper portion or a top wall of the side peripheral wall, and the gas outlet in the tank is defined as a powder inlet and a powder outlet. A filter member that is provided as described above and has a tapered peripheral wall that extends downward, and that does not allow the passage of powder of a set size but allows the passage of gas, and an opening / closing lid that is provided at the outlet of the powder or granule of the tank Wherein the drying tank is connected directly or indirectly to the upper granular material inlet to the granular material outlet of the tank of the granular material collector,
A gas tank having a lower portion serving as a powder outlet and having a gas outlet formed on the upper or top wall of the side peripheral wall, and a plurality of dry gas jet ports located above the powder outlet of the tank body. A granular material drying device having a three-dimensional nozzle. 3. A discharge port of a jet pump is connected to a powder material inlet of a tank of the powder material collector, and when the powder material is stored in the tank of the powder material collector, the powder material is collected. 3. The apparatus for drying a granular material according to claim 2, wherein the gas from the discharge port of the blower which makes the inside of the tank of the vessel a negative pressure is guided to the compressed gas inlet of the jet pump via the switching valve.