JP2984968B2 - How to put waste plastics into waste oil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the continuous oilification of waste plastics, which is obtained by heating and melting waste plastics such as thermoplastic wastes and thermally decomposing them into oil, and more particularly to the input of waste plastics in the oilification. About the method.

[0002]

2. Description of the Related Art Waste plastics such as used thermoplastics usually contain metals and other foreign substances, and are disposed of as general wastes or industrial wastes by landfilling or incineration. Some of the industrial waste is recycled by crushing it, pyrolyzing the crushed material, and catalytically reforming the cracked gas to produce useful fuels (kerosene, gasoline, etc.). ing.

Conventionally, waste plastic is supplied to a pyrolysis furnace using a screw feeder, or as shown in FIG. 3, by opening and closing two-stage ball valves (21) and (22). ).

[0004]

However, when a screw feeder is used, foreign matter such as metal contained in waste plastic is caught in the screw feeder,
As a result, the supply of waste plastic may have to be interrupted. When the upper and lower ball valves (21) and (22) are used, as shown in FIG.
The distance between the furnace and the pyrolysis furnace (23)
It is necessary to increase the cooling capacity according to (24). Otherwise, in the lower cardboard valve (22), the plastic melts and forms a bridge, which can block the conduit and also interrupt the supply of waste plastic.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a method of charging waste plastic in oiling waste plastic, in which waste plastic can be charged into a pyrolysis furnace without any trouble.

[0006]

The method of charging waste plastic according to the present invention has been devised to achieve the above object, and is provided under a hopper (1) via a ball valve (2). A storage channel (3), an extrusion channel (4), which is provided in a downwardly sloped manner so as to communicate with the lower end of the storage channel (3), and a front end of the extrusion channel (4); An input path (6) reaching the pyrolysis furnace (11), a pusher (5) of the required length, which can be moved back and forth in the extrusion path (4), and an extrusion path
It can be freely opened and closed at the exit from (4) to the input path (6).
In the waste plastic dosing device provided with the damper (9) , the pusher (5) is positioned below the storage path (3), and the lower end of the storage path (3) is closed by the body of the pusher (5). A predetermined amount of waste plastic supplied to the hopper (1) is dropped into the storage path (3) and stored there, and the pusher (5)
, Open the lower end of the storage path (3), drop the waste plastic into the extrusion path (4), advance the pusher (5 ), open the damper (9) , and remove the waste in the extrusion path (4). extruding a plastic to put path (6), is dropped to the pyrolysis furnace (11), to return the pusher (5) to a position beneath the storage path (3), the damper
(9) is closed, and the lower end of the storage channel (3 ) is closed by the peripheral body of the pusher (5).

[0007]

Next, embodiments of the present invention will be specifically described.

In FIG. 1, a waste plastic charging device is connected to a storage path (3) provided below a hopper (1) via a ball valve (2) and a lower end of the storage path (3). An extrusion path (4), a charging path (6) communicating with the front end of the extrusion path (4) and reaching the pyrolysis furnace (11), and an extrusion path.
(4) Pusher of required length arranged to be able to move back and forth inside
(5).

[0009] The storage channel (3) and the charging channel (6) are both arranged vertically, and the extrusion channel (4) is arranged with a downward slope in front. The radius and length of the pusher (5) are set so that the lower end of the storage channel (3) can be closed at the periphery of the pusher (5). The pusher (5) is moved back and forth in the extrusion path (4) by a cylinder (7) connected to the rear end. The extrusion path (4) and the charging path (6) are covered with a water cooling jacket (8) and are cooled by circulation of water. A damper (9) is attached at the outlet from the extrusion path (4) to the charging path (6) so as to be freely opened and closed. In FIG.
The pusher (5) and the damper (9) , shown by solid lines, prevent the high-temperature steam of the pyrolysis oil generated in the pyrolysis furnace (11) from flowing back through the input path (6) to the extrusion path (4). Play a role. In particular, if a blockage occurs between the ball valve (2) and the extrusion path (4), the damper (9)
The gas backflow prevention function works effectively. Input path (6)
A detachable lid (10) is provided at the upper end of the cover. Input path
(6) Remove the lid (10) from the charging path (6) when cleaning the inside.

In the waste plastic charging device having the above-mentioned structure, first, the ball valve (2) is closed, and a predetermined amount of the crushed waste plastic is supplied thereto. At this time, the pusher (5) is positioned below the storage channel (3), and as shown by a solid line in FIG.
Keep the lower end closed. In this state, the ball valve (2) is opened, and the waste plastic in the hopper (1) is dropped into the storage path (3) and stored there. Thereafter, the ball valve (2) is closed again.

Then, the pusher (5) is retracted until its front end reaches a point (A) behind the lower end of the storage furnace (3),
Open the lower end of the storage channel (3) and push the waste plastic
(4) Drop naturally.

Thereafter, as shown by a chain line in FIG. 2, the pusher (5) is advanced by the cylinder (7) to push the waste plastic in the extrusion path (4) forward. as a result,
The damper (9) is pushed open by the crushed waste plastic, and the crushed waste plastic is extruded from the extruding path (4) to the input path (6) and falls into the pyrolysis furnace (11). The pusher (5) is finally advanced until its front end pushes it open at the position (B) of the damper (9).

Thereafter, the pusher (5) is returned to a position below the storage path (3), and the lower end of the storage path (3) is closed by the peripheral body of the pusher (5) as shown by a solid line in FIG.

The above operation is repeated, and the crushed waste plastic is sequentially charged into the pyrolysis furnace (11).

[0015]

According to the waste plastic charging method of the present invention, since a screw feeder is not used, there is no possibility that a foreign substance such as a metal contained in the waste plastic is caught in the screw feeder, and As in the case of using a two-stage ball valve, the plastic does not melt in the lower ball valve to form a bridge, which does not block the conduit and also interrupts the supply of waste plastic.

Therefore, according to the method of the present invention, waste plastic can be continuously introduced into the pyrolysis furnace without any trouble.

[0017] In addition, the pusher and the damper generate heat.
High-temperature steam of pyrolysis oil generated in the furnace is extruded through the input channel
It serves to prevent backflow into the road. Especially the ball
If a blockage occurs between the valve and the extrusion path, remove it.
In the work to be removed, a gas backflow prevention device by a damper
Noh works effectively.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an apparatus for converting waste plastic to oil.

FIG. 2 is a schematic view showing a waste plastic charging device of an embodiment.

FIG. 3 is a schematic view showing a conventional waste plastic charging device.

[Explanation of symbols]

 1: Hopper 2: Ball valve 3: Storage path 4: Extrusion path 5: Pusher 6: Input path 11: Pyrolysis furnace

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-89480 (JP, A) JP-A-4-170495 (JP, A) JP-A-48-71484 (JP, A) JP-A-50-89484 48080 (JP, A) Fully open 1987-48507 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) C10G 1/10 B09B 3/00

Claims (1)

(57) [Claims] A storage path (3) provided below a hopper (1) via a ball valve (2), and a downwardly sloped front so as to communicate with a lower end of the storage path (3). extruding channel provided with (4), extruding channel (4) communicating and poured path reaching the pyrolysis furnace (11) at the front end of the (6), arranged freely move back and forth in the extrusion path (4) in Pusher (5) of required length and extrusion path
It can be freely opened and closed at the exit from (4) to the input path (6).
In the waste plastic dosing device equipped with a damper (9) , the pusher (5) is positioned below the storage path (3), and the lower end of the storage path (3) is closed by the body of the pusher (5). A predetermined amount of waste plastic supplied to the hopper (1)
Drop it to (3) and store it here, retract the pusher (5) and open the lower end of the storage channel (3),
The waste plastic is dropped into the extrusion path (4), the pusher (5) is advanced, the damper (9) is opened, the waste plastic in the extrusion path (4) is extruded into the input path (6), and the pyrolysis furnace ( is dropped to 11), to return the pusher (5) to a position beneath the storage path (3), Dunn
Closing the lower end of the storage channel (3) with the peripheral part of the pusher (5 ) by closing the par (9) .