JPH0734654Y2 - Waste plastic processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a waste plastic processing apparatus for heating and melting waste plastic and cooling and solidifying it, and particularly to an apparatus suitable for processing waste expanded polystyrene. .

[Conventional technology]

A known waste plastic processing apparatus of this type has a funnel-shaped melting furnace that has a large number of hot air inlets and is reduced downward, a hot air retention chamber that surrounds the melting furnace, and hot air that supplies hot air to the hot air retention chamber. It comprises a generator and a container arranged below the melting furnace for receiving the molten waste plastic. The waste plastic introduced into the melting furnace from the upper side is heated and melted by the hot air supplied from the hot air generator through the hot air retention chamber and the hot air inlet into the funnel-shaped melting furnace and falls into the container.

[Problems to be solved by the device]

In the case of this conventional waste plastic processing apparatus, since the small diameter outlet of the funnel-shaped melting furnace is open, before the waste plastic melts, it falls from the outlet of the melting furnace.
There is a drawback that it is difficult to reduce the volume.

The present invention has been made to eliminate the above-mentioned drawbacks, and an object thereof is to provide an apparatus for treating waste plastic, which enables sufficient melting and volume reduction of waste plastic.

[Means for Solving the Problems]

To achieve this object, the waste plastic processing apparatus according to the first invention has a funnel-shaped melting furnace that has a large number of hot air inlets and is reduced in size downward, and a hot air retention chamber that surrounds the melting furnace. A hot air generator for supplying hot air to the hot air retention chamber and a container for receiving molten waste plastic disposed below the melting furnace are provided, and hot air passes from the hot air generator through the hot air retention chamber and the hot air inlet. In a waste plastic processing apparatus that is supplied into a funnel-shaped melting furnace and melts and reduces the volume of waste plastic, a rod-shaped stopper is arranged at the outlet of the funnel-shaped melting furnace with the stopper facing downward inward along the wall surface of the melting furnace. And a funnel shape continuous with the melting furnace.

Further, the waste plastic processing apparatus according to the second invention is characterized in that a rod-shaped stopper is horizontally slidable below the outlet of the melting furnace and can be taken out to the side of the melting furnace. .

[Action]

In the waste plastic processing apparatus of the first invention, a rod-shaped stopper is arranged at the outlet of the funnel-shaped melting furnace so as to face inward downward along the wall surface of the melting furnace to form a funnel shape continuous with the melting furnace. Therefore, the waste plastic pieces that have been thrown in are received by this stopper and do not fall before melting. In addition, since sticker labels and gum tape can be dropped through this stopper,
Does not cause clogging.

In the waste plastic processing apparatus of the second invention, a rod-shaped stopper is further arranged horizontally slidable below the outlet of the melting furnace so that it can be taken out to the side of the melting furnace. The stopper can be replaced according to the shape and size of the waste plastic to be cleaned, and the cleaning thereof is easy.

〔Example〕

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

1 to 3 show a waste plastic processing apparatus according to a first embodiment of the present invention. This waste plastic processing device is essentially composed of a crusher 1, a melter 2 and a hot air generator 3.

The crusher 1 has a container 4 whose upper side is open, and inside the container 4, a cutter composed of a rotary blade 5 and a fixed blade 6 is arranged. The rotary blade 5 is fixed to a horizontal shaft 8 which is rotatably driven by a motor 7 and which is supported on the side wall of the container 4. Four rotary blades 5 are provided in each vertical plane (see FIG. 2), and a large number of rotary blades 5 are arranged at regular intervals in the longitudinal direction of the shaft 8. A fixed blade 6 is horizontally fixed to the side wall of the container 4 below the shaft 8 and in parallel with the shaft 8. The fixed blade 6 has a notch at a position corresponding to the rotary blade 5. Therefore, the rotary blade 5 passes through this notch during rotation, and cuts the waste plastic with the fixed blade 6. The width of the notch is slightly larger than the width of the rotary blade 5.

As shown in FIG. 2, the bottom region 4a of the container 4 is inclined inward, and a horizontal feed screw conveyor 9 is horizontally arranged at the bottom thereof. This lateral feed screw conveyor 9 is a motor
The waste plastic rotatably driven by 10 and crushed by the cutters 5 and 6 is conveyed toward the outlet 11 of the container 4. This exit 11 has a vertical feed screw conveyor device 12
The vertical cylindrical body 13 of is connected. The vertical feed screw conveyor 14 of the vertical feed screw conveyor device 12 has a motor 15
Is driven to rotate in the vertical cylindrical body 13 to convey the waste plastic upward. Vertical feed screw conveyor device 12
The waste plastic conveyed to the upper end of is melted through the chute 16 which is connected to the upper end of the vertical cylindrical body 13 and inclines downward.

The melting machine 2 is substantially composed of a supply section 17, a melting section 18 and a cooling section.
It consists of 19. The horizontal walls of the outer walls 17a, 18a, 19a of the supply unit 17, the melting unit 18, and the cooling unit 19 are quadrangular in the embodiment, but may be circular. Outer walls 17a, 18a,
For 19a, by tightening the flange with a bolt,
Fixed to each other.

As described above, the melting machine 2 is provided with the supplying unit 17, the melting unit 18, and the cooling unit 19.
Since it is divided into two parts and bolted to each other, the supply part 17, the melting part 18 and the cooling part 19 can be attached to each other in arbitrary directions. That is, the supply unit 17, the melting unit 18, and the cooling unit 19 can be relatively rotated around the longitudinal center axis of the melting machine 2 and attached in any direction (outer wall).
If the horizontal cross section of 17a, 18a, 19a is square, install 9
It can be offset by 0 °, 180 ° if it is rectangular, and by a predetermined angle depending on the bolt spacing if it is circular).

The supply unit 17 has a function of charging and preheating waste plastic and discharging exhaust gas. Therefore, the supply part 17 is provided with an opening (waste plastic input port) 20 for inserting the chute 16, a central preheating chamber 21, and an exhaust chamber 23 connected to an exhaust blower 22. The waste plastic input port
20 is formed on the upper wall portion of the outer wall 17a formed obliquely. The exhaust chamber 23 is formed by an inner surface of the outer wall 17a, a vertical plate 23a attached to the inner surface, and a plate 23b extending obliquely upward.

A melting section 18 is provided below the supply section 17. The melting section 18 is equipped with a funnel-shaped melting furnace 24 that shrinks downward in order to melt the waste plastic and reduce its volume.
A large number of hot air inlets 25 are formed in the melting furnace 24. Regarding the width of each of the hot air inlets 25, the hot air inlet on the upper side is wide and the width is narrower toward the lower side. Each hot air inlet
Immediately above 25, a hot air inlet cover plate 26 is formed so as to form an acute angle with the inner surface of the melting furnace 24.

A hot air retention chamber 27 is formed between the melting furnace 23 and the outer wall 18a, and this hot air retention chamber is connected to the hot air generator 3 via a connection pipe 28. The hot air generator 3 includes a burner 29 and a blower 30.

The hot air generated by the hot air generator 3 is connected pipe 28, hot air retention chamber 27
And it is introduced into the funnel-shaped melting furnace 24 through the hot air inlet 25.

At the lower outlet of the melting furnace 24, a rod-shaped stopper 31 for receiving unmelted waste plastic pieces so as not to drop is attached by welding or the like. As shown in FIG. 3, the stopper 31 extends inward and downward from the lower end of the melting furnace 24. The stopper 31 also has a function of dropping a label (paper), a gum tape, or the like attached to the Styrofoam product (box). Therefore, the label or the gum tape does not block the outlet of the melting furnace 24.

The stopper 31 may be formed as shown in FIGS. 4 and 5. That is, as in the stopper 31A in FIG. 4, a long rod and a short rod may be formed in combination, or when the horizontal cross-sectional shape of the melting furnace 24 is circular, as shown in FIG. 31B can be formed.

Below the melting part 18, a cooling part 19 for cooling and solidifying the melted waste plastic is provided. The cooling unit 19 is provided with a container 32 for receiving the waste plastic melted and dropped in the melting unit 18, and a container loading / unloading door 33 for removing the container (shown by a chain double-dashed line in FIG. 1). There is.

Next, a method of using the waste plastic processing apparatus having the above structure will be described. First, waste plastic P such as Styrofoam, polyethylene, polyvinyl chloride, polypropylene, etc. is put into the container 4 of the crusher 1, and the rotary blade 5 and the fixing 6 are fixed.
Crush by. The roughly crushed waste plastic pieces fall to the bottom of the container 4, and are conveyed by the horizontal feed screw conveyor 9 through the outlet 11 to the vertical feed screw conveyor device 12. The waste plastic piece is further conveyed upward by the vertical feed screw conveyor device 12 and introduced into the melting machine 2 via the chute 16.

Waste plastic pieces are piled up in the melting machine 2 and the supply section 17
Is preheated inside, and hot air is generated in the melting section 18 (the temperature of this hot air is about 8% if the waste plastic is Styrofoam).
It is 300 ° C. Decomposes and gives off a foul odor above 320 ° C. Or it ignites at about 500 ° C) and is melted by heating. At that time, the hot air reaches the inside of the melting furnace 24 from the hot air generator 3 through the connecting pipe 28, the hot air retention chamber 27 and the hot air inlet 25.
Therefore, the waste plastic pieces are directly heated by the hot air and indirectly heated by the heat transmitted from the hot air retention chamber 27 through the wall of the melting furnace 24.

Molten waste plastic passes through stopper 31 and container 32
To fall. Since the unmelted waste plastic piece is received by the stopper 31, it does not fall. Therefore, the waste plastic pieces are sufficiently melted and reduced in volume. Since the label (paper), gum tape, etc. attached to the Styrofoam product (box) drop through the stopper 31, the outlet of the melting furnace 24 is not blocked. Further, the generated exhaust gas is exhausted from the upper exhaust chamber 23 by the exhaust blower 22.

The molten waste plastic collected in the container 32 is solidified by natural cooling and taken out from the container entrance / exit door 33. By the above melting and cooling and solidification, the volume of the waste plastic is reduced to about 1/10.

FIGS. 6 and 7 show a waste plastic processing apparatus according to a second embodiment of the present invention. In this waste plastic processing device, a rod-shaped stopper 31C is arranged below the outlet of the melting furnace 24 so as to be horizontally slidable,
This is different from the waste plastic processing apparatus according to the first embodiment. The stopper 31C is fixed to the frame 34 by welding or the like,
And it is mounted on the horizontal rail 35. Stopper 31C
Can be moved in and out through a stopper door 36 formed on the outer wall 18a of the fusion zone 18. Therefore, the stopper 31C can be replaced and cleaned according to the shape and size of the waste plastic to be treated. Therefore, it is necessary to prepare a plurality of stoppers 31C having different rod intervals, inclinations, arrangement structures, and the like.

[Effect of device]

As described above, in the waste plastic processing apparatus of the first invention, the rod-shaped stopper is arranged at the outlet of the funnel-shaped melting furnace so as to face inward downward along the wall surface of the melting furnace and is continuously connected to the melting furnace. Since it is formed in the shape of a funnel, the waste plastic pieces that are thrown in are received by this stopper and do not fall before melting. Therefore, the waste plastic can be sufficiently melted and the volume thereof can be reduced, and the solid matter becomes considerably dense. Furthermore, since the sticky label, gum tape, etc. pass through the stopper, the stopper does not become clogged.

Further, in the waste plastic processing apparatus of the second invention, the rod-shaped stopper is arranged below the exit of the melting furnace so as to be slidable in the horizontal direction and can be taken out to the side of the melting furnace. The stopper can be replaced according to the shape and size of the waste plastic, and the stopper can be easily cleaned.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical cross-sectional view showing a waste plastic processing apparatus according to a first embodiment of the present invention, and FIG. 2 is a crusher II- of FIG.
A cross-sectional view taken along line II, FIG. 3 is a view of the stopper of FIG. 1 seen from above, FIGS. 4 and 5 show other stoppers, a view similar to FIG. 3, and FIG. FIG. 7 is a vertical sectional view showing a melting machine of the waste plastic processing apparatus according to the second embodiment, and FIG. 7 is a perspective view showing stoppers and rails of the melting machine of FIG. 1 ... Crusher, 2 ... Melting machine, 3 ... Hot air generator, 4 ...
… Vessel of coarse crusher, 4a …… Bottom area of vessel 4, 5 …… Rotating blade, 6 …… Fixed blade, 7 …… Motor, 8 …… Axis, 9 …… Side feed screw conveyor, 10 …… Motor, 11 …… Exit,
12 …… Vertical feed screw conveyor device, 13 …… Vertical cylinder, 14 …… Vertical feed screw conveyor device, 15 …… Motor, 16 …… Chute, 17 …… Supply section, 17a …… Supply section outer wall, 18 ...... Melting section, 18a …… Melting section outer wall, 19 …… Cooling section, 19a …… Cooling section outer wall, 20 …… Waste plastic inlet, 21 …… Preheating chamber, 22 …… Exhaust blower, 23 ...... Exhaust chamber, 23a ...... Vertical plate of exhaust chamber, 23b ...... Oblique plate of exhaust chamber, 24 ...... Melting furnace, 25 ...... Hot air inlet, 26 ...... Hot air inlet cover plate, 27 ...... Hot air retention chamber, 28 …… connection pipe, 29 …… burner, 30 …… blower, 31,31A, 31B, 31C …… stopper,
32 …… container, 33 …… container access door, 34 …… frame, 35 ……
Rail, 36 ... Stopper door, P ... Waste plastic

Claims (2)

[Scope of utility model registration request] 1. A funnel-shaped melting furnace having a large number of hot-air inlets and reduced in size, a hot-air holding chamber surrounding the melting furnace, a hot-air generator for supplying hot air to the hot-air holding chamber, and melting. A container for receiving molten waste plastic, which is arranged below the furnace, and hot air is supplied from the hot air generator into the funnel-shaped melting furnace through the hot air retention chamber and the hot air inlet.
In a waste plastic processing apparatus for melting and reducing the volume of waste plastic, a rod-shaped stopper is arranged at the outlet of the funnel-shaped melting furnace facing the inside wall downward along the wall of the melting furnace. A waste plastic processing device characterized in that it is formed into. 2. A rod-shaped stopper is provided below the melting furnace outlet.
The waste plastic processing device according to claim 1, wherein the waste plastic processing device is arranged so as to be slidable in a horizontal direction and can be taken out to the side of the melting furnace.