JPH02166084A - Gas supply apparatus for silo - Google Patents

Abstract

PURPOSE:To permit a continuous operation with a uniform flow of gases and particles by making an annular internal-to-body mounting angle smaller than a cone-to-body mounting angle. CONSTITUTION:Particles 12 are sent into a cyclone 10 by air or gas through a supply line 11. A gas supply device for a silo comprises an inverted cone part 4 at its lower part, an unprocessed material supply opening 1 and a gas emission opening 2 at the top of its main body 3 and a processed material discharge opening 5 at the apex of the cone part and an annularly-shaped internal 16 provided around the inner wall of a connecting part between the main body 3 and the cone part 4. The internal-to-body mounting angle theta1 is made smaller than the cone-to-body mounting angle theta2. From a gas feed opening 7, the gas is supplied through a gas feed line 13 and a flow adjusting valve 19 between the body 3 and the internal 16. In doing so, the gas can be supplied uniformly into the silo from all around the internal 16 and the particles 12 will not stay in an opening part 17. Furthermore, since a lower edge 16' approaches the cone part 4, gas G is delivered near the inner periphery of the silo, making a continuous and uniform processing of the particles possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a gas supply device for a silo, more specifically, for drying particles such as polymer pellets or removing volatile substances attached to particles. The present invention relates to a gas supply device for a silo that makes the flow of gas supplied to the inside of the silo uniform and also makes the flow of particles uniform without any stagnation.

[Prior art]

Generally, a silo is used to dry particles as a process object or to remove volatile substances attached to the particles, and in this silo, gas and particles come into contact, drying or removing volatile substances. will be carried out.

Conventionally, such devices as shown in FIGS. 4 to 7 have been proposed.

That is, what is shown in FIGS. 4 and 5 is a main body 3 which is cylindrical and has a cone portion 4 formed at its lower part, and a particle supply port I and a gas outlet port which are processed materials are provided at the top of the main body 3. 2, and a particle outlet 5 is provided at the lower end of the cone portion 4 to constitute a silo A.

This cone portion 4 is provided with a plurality of gas supply lowers.

However, in this apparatus, since a perforated plate or a wire mesh 20 is installed on the gas supply lower part to prevent particles from flowing in, the processing particles may get caught in or adhere to the wire mesh and cause clogging. As a result, there was a problem that degraded particles were mixed into the product, making it impossible to use it continuously for a long period of time. In addition, the device requires a large number of gas supply ports in order to uniformly process the entire cross section of the main body 3, which increases the number of problems described above.

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

However, according to this device, a stagnation area of particles occurs in the opening 9 as shown in FIG. 6, and as a result, particle processing cannot be achieved uniformly, and as a result, deterioration and deterioration occur as in the case of the one in FIG. 4. There was a problem with particles getting into the product, making it impossible to use it continuously for a long period of time.

As described above, in the conventional system, clogging and particulate stagnation occur in the gas supply port passage. the result,
It was impossible to use it continuously for a long period of time because it was impossible to process particles continuously and uniformly.

In order to solve this problem, it has been implemented to install many silos and perform particle processing in batch mode, but in this case, the entire device becomes large, which increases manufacturing costs and requires a large installation area. There is a problem.

[Purpose of the invention]

The present invention was made in order to solve the problems of the conventional apparatus as described above, and it equalizes the flow of gas in a silo used for drying particles or removing volatile substances, Furthermore, the purpose is to make the flow of particles uniform so that there are no stagnation areas, thereby making continuous operation possible, thereby reducing the size of the apparatus.

[Summary of the invention]

The gas supply device for a silo according to the present invention has a main body in which a cone portion is formed by reducing the lower part, and a processing material supply port and a gas discharge port are provided in the upper part of the main body, and a processing material extraction port is provided in the lower part.
Further, an annular internal is provided on the inner circumferential wall of the connecting portion between the main body and the cone portion, and the mounting angle θ between the main body and the annular internal is defined as the mounting angle θ between the main body and the cone portion,
It is characterized in that it is configured to be smaller and configured to supply gas between the main body and the annular internal.

That is, in the present invention, particles to be processed are supplied from the upper part of a main body having a cone formed at the lower part, and gas is supplied from the lower part to bring them into contact with each other through countercurrent flow, thereby processing the particles. This is an improvement of the silo, in which an annular internal is provided on the inner circumferential wall of the main body portion in which the upper end of the cone portion is formed to supply gas for treating the object to be treated.

The annular internal 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 this cone part, and the steep inclination angle of this annular internal makes it difficult to handle the workpiece. In addition to making it easier for certain particles to fall, the gas is supplied from a place as close to the peripheral wall of the main body as possible to avoid forming a slow-flowing part of the gas near the peripheral wall, and the gas is supplied from the gas supply lower. The cross-sectional area of the part surrounded by the main body 3 and the internal 16, which is a passage for feeding the gas G in the circumferential direction of the silo, is ensured to be large, making it easy to supply the gas G in the circumferential direction of the main body 3. In addition, the opening 17 is made small to eliminate the stagnation part of the particles 12.

In the present invention, the annular internal is provided at the part where the straight part of the main body transitions to the cone part, and the internal is provided so that the lower edge thereof covers this part, that is, the upper end of the cone part. It's good.

〔Example〕

An embodiment of the silo gas supply apparatus according to the present invention will be described below with reference to FIGS. 1 and 2. In addition, in these figures, the same reference numerals as in FIGS. 4 to 7 indicate the same names.

In FIG. 1, IO is a cyclone attached to a particle supply port l provided at the top of the main body 3, and a particle supply line 11 is connected to the cyclone 10 from a supply device (not shown).
Particles 12 (workpiece) are transported through the air or gas.

A gas outlet 2 is further provided on the main body 3, and a cone portion 4 is formed at an angle θ at the bottom thereof, and a rotary valve 15 is attached to a particle outlet 5 at the bottom of the cone portion 4. There is. Further, an annular internal 16 is provided on the inner circumferential wall of the connecting portion between the main body 3 and the cone portion 4.

In detail, as shown in FIG. 2, this internal 16
is formed at an angle θ on the main body 3, but this angle θ1 is configured to be smaller than the mounting angle θ between the main body 3 and the cone portion 4, and the lower edge 16゜ of this internal I6
An opening 17 is formed between the cone portion 4 and the cone portion 4. The openings 17 are formed at intervals (about 20 mm, preferably about 15 mIm) that allow five, preferably three, polymer pellet particles 12 to pass through.

Further, gas is supplied between the main body 3 and the internal 16 from a gas supply lower via a gas supply line 13 and a flow rate control valve 19.

The cone part 4 and the inclination angle [6 are determined in consideration of the angle of repose of the particles 12 so as not to be deposited on the cone part 4, but the annular internal 16 and the main body 3 are attached at an angle θ. By making the angle θ smaller, that is, by making the inclination angle steeper, the gas flow is diffused to the inner wall side of the main body 3, and the accumulation of particles is completely eliminated and the flow of particles is improved. This is what I did.

Further, the opening 17 formed between the lower edge 16° of the internal 16 and the cone portion 4 has no stagnation area for particles, and the particles can flow smoothly.

Furthermore, as shown in Fig. 3, it is generally known that installing a conical internal 6 at the center of the cone section 4 is effective in converting the flow of particles in the silo into a mass flow. , a structure in which gas G is supplied from a gas supply lower to the lower part is also conceivable. Furthermore, if the above-mentioned FIG.
In addition, the gas from the annular internal 16 rises along the inner peripheral wall portion n of the main body, making it possible to equalize the upward flow of gas over the cross section of the main body 3, and furthermore, the flow of particles is also prevented from stagnation. This is more preferable since it is possible to achieve uniformity without any problems.

〔Effect of the invention〕

In the silo gas supply device of the present invention, the mounting angle θ1 between the main body 3 and the annular internal 16 is made smaller than the mounting angle θ between the main body 3 and the cone portion 4, so that the mounting position of the internal 16 with respect to the main body 3 is It became possible to bring the lower edge 16° of the internal 16 closer to the cone portion 4 without moving it downward.

As mentioned above, since the mounting position of the internal 16 is located upward, the gas G supplied from the gas supply lower is surrounded by the main body 3 and the internal 16, which are the passages for feeding in the circumferential direction of the silo. It was possible to form the opening 17 small while maintaining a large cross-sectional area of the closed portion.

As a result, the gas G can be evenly supplied into the silo from the entire circumference of the annular internal 16, and there is no stagnation part of the particles 12 in the opening 17, and the particles 12 can flow well.
Furthermore, since the lower edge 16' of the internal 16 approaches the cone portion 4, gas G is supplied near the inner circumference of the silo, making it possible to process particles continuously and uniformly, and overall reducing manufacturing costs by downsizing the device. This has the effect of making it possible to reduce the size and installation area.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of one embodiment of the silo gas supply device according to the present invention, Fig. 2 is an enlarged view of the main part of Fig. 1, and Figs. A schematic sectional view of the supply device, FIG. 5 is an enlarged view of the main part of FIG. 4, and FIG. 7 is an enlarged view of the main part of FIG. 6. 1. Particle supply port 2. Gas outlet, 3. Main body, 4. Cone, 5. Particle outlet, 6. Conical internal, 7. Gas supply port, 8.16.・Annular internal, 9.17...opening, lO...cyclone, 1
1. Particle supply line, 12. Particles, 13. Gas supply line, 15. Rotary valve, 19. Flow rate control valve, 20. Perforated plate or wire mesh. Fig. 1j Wei M') Fig. 6 Fig. 3 Fig. 7 Broom 5 Fig. 4

Claims (1)

[Claims] A processing material supply port and a gas discharge port are provided in the upper part of the main body, in which a cone part is formed by reducing the lower part, and a processing material extraction port is provided in the lower part. is provided with an annular internal, and the mounting angle θ_1 between the main body and the annular internal is configured to be smaller than the mounting angle θ_2 between the main body and the cone part, and the mounting angle between the main body and the annular internal is A gas supply device for a silo, characterized in that it is configured to supply gas between.