JP2625530B2 - Silo gas supply equipment - Google Patents

Description

The present invention relates to a gas supply device for a silo, and more particularly to a method for drying particles such as polymer pellets or removing volatile substances attached to particles. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silo gas supply device in which a silo used has a uniform flow of gas supplied therein and a uniform flow of particles without any stagnant portion.

(Prior art)

In general, a silo is used to dry particles as an object to be treated or to remove volatile substances attached to the particles, and the gas and the particles come into contact with the silo to dry or remove the volatile substances. Is performed.

Conventionally, as such an apparatus, those shown in FIGS. 4 to 7 have been proposed.

4 and 5 are cylindrical and have a conical portion at the bottom, that is, a particle supply port 1 which is an object supply port at an upper portion of a main body 3 having a cone portion 4 formed therein. An outlet 2 is provided, and a particle outlet 5 is provided at a lower end of the cone portion 4 to constitute a silo A. The cone 4 has a structure in which a plurality of gas supply ports 7 are provided.

However, in the above-described apparatus, since the perforated plate or the wire mesh 20 is installed at the gas supply port 7 to prevent the inflow of the particles, the treated particles are caught on the wire mesh or clogged. As a result, there is a problem that the deteriorated and deteriorated particles are mixed in the product, and the continuous use cannot be performed for a long time. Further, the apparatus requires a large number of gas supply ports in order to perform uniform processing over the cross section of the main body 3, and the above-mentioned problems increase in proportion thereto.

On the other hand, as shown in FIGS. 6 and 7, in order to improve the gas flow in the inner peripheral wall portion n of the main body 3, an annular internal 8 is attached near the lower portion of the main body 3, and the internal 8 and the main body 3 are connected to each other. A structure in which a gas supply port 7 is provided between the three has been proposed.

However, according to this apparatus, as shown in FIG. 6, a stagnant portion D of the particles is generated in the opening 9, and as a result, the particle processing cannot be made uniform, and as a result, deterioration and deterioration have occurred as in FIG. There was a problem that the particles were mixed into the product, so that long-term continuous use was not possible.

As described above, in the conventional method, clogging and stagnation of particles occur near the gas supply port. As a result, continuous and uniform treatment of particles could not be performed, and long-term continuous use was impossible.

In order to solve this problem, a number of silos are provided, and particle processing is performed by a batch method. However, in this case, the entire apparatus becomes large, which increases the manufacturing cost and increases the installation area. There is a problem.

[Object of the invention]

The present invention has been made in order to solve the problems of the conventional apparatus as described above, and is intended to uniformly dry the object to be processed and remove volatile substances attached to the object to be processed. Another object of the present invention is to reduce the size of the apparatus by making the flow of gas in a silo used for removal uniform, and also making the flow of particles uniform without stagnant portions, thereby enabling continuous operation.

[Summary of the Invention]

The gas supply device for a silo according to the present invention is provided with an object supply port to which a cyclone is attached, and a gas discharge port on the upper portion of the main body in which the lower portion is reduced to form a cone portion,
A processed material outlet is provided at a lower portion, and furthermore, an internal is provided in an annular shape on an inner peripheral wall of a connection portion between the main body and the cone portion. It is characterized in that it is configured to be smaller than the mounting angle θ2 with the cone portion, and to supply gas between the main body and the annular internal.

That is, in the present invention, the particles to be processed are supplied from the upper portion of the main body having the cone portion formed at the lower portion through a cyclone, and the gas is supplied from the lower portion, and the particles are brought into contact with each other by countercurrent to make the particles contact each other. An improvement of a silo for processing, wherein an internal is provided in an annular shape on an inner peripheral wall of a main body portion in which an upper end portion of the cone portion is formed so that a gas for processing an object to be processed is supplied. It is composed.

Then, by supplying particles as the object to be processed through the cyclone, air or gas used for transporting the object to be processed is discharged from the cyclone to the outside, and is fed into the silo from the supply port of the object to be processed. Only the object to be processed is processed.

Therefore, the air or gas used for transportation does not contact the object to be processed in the silo, and only the gas supplied from between the main body and the annular internal contacts the object to be processed in the silo. Becomes

Therefore, the gas supplied from between the main body and the annular internal is counter-currently contacted with the descending object to be treated without being obstructed by the air or gas used for transporting the object to be treated. The material can be dried well and volatile substances and the like adhering to the material can be satisfactorily removed.

Furthermore, since the air or gas used for transportation is discharged from the cyclone to the outside, the amount of gas discharged from the gas discharge port is reduced, and when the gas is discharged from the gas discharge port, the object to be processed in the silo is reduced. It is prevented from being exhausted with gas.

The annular internal part formed at the boundary between the parallel part and the cone part of the main body has an inclination angle smaller than the inclination angle of the cone part. In addition to facilitating the falling of certain particles, the gas is supplied from a location as close as possible to the peripheral wall of the main body so that a portion where the gas flow is slow is not formed near the peripheral wall, and supplied from the gas supply port 7. Main body 3 which is a passage for feeding the discharged gas G in the circumferential direction of the silo.
And a large cross-sectional area of the portion surrounded by the internal 16, facilitate supply of the gas G in the circumferential direction of the main body 3, reduce the opening 17, and eliminate the stagnation portion of the particles 12. It was done.

In the present invention, the place where the annular internal is provided is a part that moves from the straight part of the main body to the cone part, but this part, that is, the internal part is provided so that the lower edge part covers the upper end part of the cone part Is good.

〔Example〕

Hereinafter, an embodiment of a gas supply device for a silo according to the present invention will be described with reference to FIGS. 1 and 2. In these figures, the same reference numerals as those in FIGS. 4 to 7 denote the same names.

In FIG. 1, reference numeral 10 denotes a cyclone attached to a particle supply port 1 provided at an upper portion of the main body 3. Particles 12 (objects to be treated) are supplied to the cyclone 10 from a supply device (not shown) through a particle supply line 11. Or transported by gas.

A gas outlet 2 is further provided on the main body 3,
A cone portion 4 is formed at an angle θ2 at a lower portion thereof, and a rotary valve 15 is attached to a particle outlet 5 below the cone portion 4. Further, an annular internal 16 is provided on an inner peripheral wall of a connection portion between the main body 3 and the cone portion 4.

More specifically, as shown in FIG.
Is formed at the body 3 at an angle .theta.1, the angle .theta.1 is configured to be smaller than the mounting angle .theta.2 between the body 3 and the cone portion 4, and the lower edge 16 'of the internal 16 and the cone An opening 17 is formed between the parts 4. And this opening 17
The polymer pellets are formed at intervals (20 mm, preferably about 15 mm) at which five, preferably three, polymer particles 12 can overlap and pass. Further, a gas is supplied from the gas supply port 7 between the main body 3 and the internal 16 via a gas supply line 13 and a flow control valve 19. The cone 4 and the inclination angle θ2 are determined in consideration of the angle of repose of the particles 12 and
The attachment angle θ1 between the annular internal 16 and the main body 3 is smaller than the angle θ2, that is, by making the inclination angle steeper, the gas flow in the main body 3 is reduced. In addition to being diffused to the wall surface side, the accumulation of particles is completely eliminated and the flow of particles is improved.

Further, the opening 17 formed by the lower edge 16 'of the internal 16 and the cone portion 4 has no stagnation portion of the particles, and the flow of the particles becomes good.

It is generally known that, as shown in FIG. 3, it is effective to install a conical internal 6 in the center of the inside of the cone portion 4 in order to make the flow of particles in the silo mass flow. However, a structure in which the gas G is supplied to the lower portion from the gas supply port 7 is also conceivable. Further, in addition to the present invention,
3, the gas supplied into the main body 3 is mainly the gas G from the internal 6 at the central portion C, and the gas from the annular internal 16 is the gas at the inner peripheral wall portion n of the main body. As a result, the ascending flow of the gas can be made uniform over the cross-section of the main body 3, and the flow of the particles can be improved without any stagnant portion, and the uniformity can be achieved.

〔The invention's effect〕

The gas supply device for a silo of the present invention is
A processing object supply port to which the cyclone 10 is attached and a gas discharge port are provided.

Therefore, the air or gas used for transporting the workpiece supplied from the workpiece supply port provided with the cyclone 10 is discharged from the cyclone 10 to the outside, and is sent into the silo A from the workpiece supply port. Only the object to be processed is inserted.

Therefore, the air or gas used for transportation does not come into contact with the object to be processed in the silo A, but comes into contact with the object to be processed in the silo A only from the space between the main body 3 and the annular internal 16. Gas only.

Therefore, the gas supplied from between the main body 3 and the annular internal 16 flows counter-currently with the descending workpiece without being hindered by the air or gas used for transporting the workpiece, and becomes uniform. The object can be satisfactorily dried upon contact with the object, and volatile substances and the like adhering to the object can be satisfactorily removed.

Further, since the air or gas used for transportation is discharged outside from the cyclone 10, the amount of gas discharged from the gas discharge port and the like is reduced, and when the gas is discharged from the gas discharge port, the gas in the silo A is discharged. It is possible to prevent the object to be processed from being discharged accompanying the gas.

And the mounting angle θ1 between the main body 3 and the annular internal 16
Is smaller than the mounting angle θ2 between the main body 3 and the cone portion 4, so that the lower edge 16 ′ of the internal 16 is moved to the cone portion 4 without moving the mounting position of the internal 16 with respect to the main body 3 downward.
It became possible to approach.

Since the mounting position of the internal 16 can be positioned upward as described above, the gas G supplied from the gas supply port 7 is surrounded by the main body 3 which is a passage for supplying the silo in the circumferential direction and the internal 16. The opening 17 could be formed small with a large cross-sectional area of the portion that was secured.

As a result, gas G can be uniformly supplied from the entire circumference of the annular internal 16 into the silo, and the particles are
Since there is no stagnation portion of the particles 12, the flow of the particles 12 becomes good, and further, since the lower edge 16 'of the internal 16 approaches the cone portion 4, the gas G is supplied near the inner periphery of the silo, and the particles are continuously and uniformly formed. Processing can be performed, and there is an effect that the manufacturing cost can be reduced and the installation area can be reduced by downsizing the apparatus as a whole.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of one embodiment of a gas supply device for a silo according to the present invention, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIGS. FIG. 5 is an enlarged view of a main part of FIG. 4, and FIG. 7 is an enlarged view of a main part of FIG. 1 ... Particle supply port, 2 ... Gas outlet, 3 ... Main body, 4 ... Cone part, 5 ... Particle outlet, 6 ... Conical internal, 7 ... Gas supply port, 8,16 …… Circular internal, 9,17 …… Open, 10 …… Cyclone, 11 …… Particle supply line, 12 …… Particle, 13 …… Gas supply line, 15 …… Rotary valve, 19 …… Flow control valve , 20 ... perforated plate or wire mesh.

Claims (1)

(57) [Claims] An upper portion of a main body having a conical portion formed by reducing a lower portion thereof is provided with a supply port for a workpiece to which a cyclone is attached and a gas discharge port, and a workpiece outlet port is provided at a lower portion. Further, an inner ring is provided on the inner peripheral wall of the connection portion between the main body and the cone portion, and the mounting angle θ1 of the main body and the circular internal is smaller than the mounting angle θ2 of the main body and the cone portion. A gas supply device for a silo, wherein the gas is supplied between the main body and an annular internal.