JP2008007737A - Waste plastic-pyrolyzed oil production system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polymeric waste plastic pyrolysis system designed not to entrain the outside air in charging feedstock( waste plastics ) thereinto and continuously discharging char therefrom. <P>SOLUTION: The polymeric waste plastic pyrolysis system comprises a multi-tiered pyrolysis chamber 10 including conveying screws 11, a heating chamber 20 for heating the pyrolysis chamber 10, a reduced-pressure charging section 50 equipped with a reduced-pressure pipe 55 connected to a charging port 13 so as to charge feedstock into the pyrolysis chamber 10 while blocking entraining the outside air, a gas collection chamber 100 designed to collect pyrolyzed gas via an exhaust pipe 14 and feed to a refining facility to liquefy the pyrolyzed gas by heat exchanging effect, a reduced-pressure discharge section 60 equipped with a pressure-reducing section 62 so as to discharge treated waste plastics via the exit 15 of the pyrolysis chamber while blocking entraining the outside air, and a vacuum pump 70 equipped for the pressure reduction of the pyrolysis chamber through being connected to the exit 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  This device is designed to recycle the waste of polymer waste such as vinyl, rubber, and synthetic resin from low oxygen state to pyrolysis process by high heat. It is about decomposition incinerator.

General synthetic resin and other polymer processing methods are classified into those that can be recycled and are used as recycling raw materials. However, the ratio is extremely small and is roughly buried or incinerated. Therefore, it is a reality that it induces not only resource waste but also serious air and environmental pollution.
A screw conveyor (10) having a vacuum transfer section (12) in the middle;
A heating line (60) equipped with a burner (50) for supplying high heat to one lower shaft and forming a heat path (61) in the upper stage;
A plurality of the heating chambers (60) are installed in the transverse heat, and are installed in a zigzag manner so as to be linked through a connecting passage (75) in which a transfer screw (73) is incorporated, and the inlet (71) is connected to the screw conveyor (10 ) And a multistage pyrolysis chamber (70) connected to the input port (80), and rotary valves (R) installed at the outlets of the inlets of the three-stage pyrolysis chamber (70),
In the above-mentioned three-stage pyrolysis chamber (70), the pyrolysis gas is passed through each exhaust pipe (74) and collected into a gas gun collection chamber (90) where it is sent to a purification facility that liquefies by heat exchange. It is configured.
In the above-mentioned prior application, a decompression device is installed in the screw conveyor (10) in order to control the inflow of external air into the multiple pyrolysis chambers so as to have a low oxygen state, and a three-stage pyrolysis chamber. Each rotary valve is installed at the entrance.
However, the pyrolysis device is operated for a long time, and in such an operation, the vacuum suction device is continuously operated so that the inflow of air into the pyrolysis chamber is blocked. There is a problem that the vacuum pump, etc. must be continuously operated together, so that the vacuum pump cannot withstand a considerable load when operating for a long time, and a failure occurs and it cannot be operated for a long time. there were.
In addition, rotary valves were installed at the entrances and exits of the pyrolysis chamber to control the inflow of air inside. However, when vinyl was introduced, the raw material was normally input due to the phenomenon of vinyl being caught in the rotary valve. In some cases, there is a problem that the connection structure is complicated and the connection structure is complicated and a separate driving means is required, which increases the production unit cost.

This device, proposed to solve the above-mentioned conventional problems, has an effect on the shape and degree of crushing of waste plastic by allowing the raw material (waste) to be compressed by the screw conveyor when it is charged. Even if it is not done, the effect of blocking the air inflow is maximized, and a compression part is placed at the lower end of the discharge port or screw conveyor to prevent the introduction of external air during continuous discharge of the product char. An object of the present invention is to provide a thermal decomposition incineration apparatus for polymer wastes.
In addition, compared with the existing process in which air is continuously removed through a vacuum pump by manually placing a diaphragm on the waste to be carried in, this device can be sustained if the air removal device is used only once in the thermal decomposition process. A low-oxygen atmosphere is maintained, so the life of the air removal device can be extended, and the thermal decomposition chamber can be configured in three stages to increase efficiency while the thermal decomposition process is sufficiently performed. it can.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.
FIG. 1 shows the overall configuration of the present invention, FIG. 2 is an enlarged view showing a decompression input portion in the present invention, and FIG. 3 is a cross-sectional view taken along the line AA of FIG. 4 shows the decompression discharge part in this device.
Equipped with a burner (40) on one shaft, forming a flue (30) in the upper stage, forming lateral heat in the combustible chamber (20) in a zigzag, and driving means ( 82) multistage pyrolysis chambers (10) each containing a transfer screw (11) rotated by
While being connected to the inlet (13) of the above-described pyrolysis chamber (10), the blades of the transfer screw (51) that gradually reduces the pitch and increases the pressure are rotated by the drive means (81). A reduced pressure charging section (50),
A gas gun collection chamber (100) in which pyrolysis gas is collected through each exhaust pipe (14) in the above pyrolysis chamber (10), liquefied by heat exchange action, and sent to a purification facility;
Installed at the outlet of the pyrolysis chamber (10), the transfer screw (61) is rotated by the drive means (83) and is connected to the vacuum discharge part (60) and the outlet (15). The pyrolysis chamber (10) is configured as a vacuum pump (70) provided to reduce the pressure.
The decompression charging part (50) is equipped with a support (53) so as to support the screw shaft and (52) in the front, and the raw material transferred rearward is compressed and connected to the charging port (13). A pressure reducing tube (55) is provided.
A transfer guide (57) is formed on the inner surface of the screw pipe (54) to increase the vinyl transfer capability in the length and direction, and the screw guide (57) is formed at an appropriate interval. The pressure reducing pipe (55) is connected to the pipe (54) with a flange connection so that maintenance and installation are easy.
The decompression discharge part (60) includes a decompression part (62) so as to block the inflow of external air so that wastes to be treated are collected on the outer side.
In the above, the drive means (81, 82, 83) is configured such that the power is transmitted by applying a chain to the sprocket whose axis is driven by the transfer screw (11, 51, 61).
Reference numeral 56 in the drawing is a hopper, and 90 is a machine base for supporting the thermal decomposition apparatus.
If we explain the action for this device configured like this,
For the time being, when this device is operated, the pressure-reducing part (62) of the pressure-reducing discharge part (60) is artificially shut off temporarily from the outside, and then this device is operated.
Driving means by crushing polymer waste plastics such as rubber and synthetic trees into an appropriate size and putting them in a hopper (56) mounted on the outer shaft of a waste plastic plastic (50) direct decompression transfer unit (50) While the waste is being crushed by the transfer screw (51) rotated by (81), the pitch of the transfer screw (51) becomes smaller and smaller while the waste plastic is being crushed, and the transfer speed of the waste plastic is delayed. 51) is sent to the pressure reducing pipe (55) so that the waste plastic is densely packed in the space inside.
Here, the transfer guide (57) is formed at an appropriate interval on the inner surface of the screw tube (54), and the middle vinyl type of waste plastic may get caught in the groove between the transfer guide (57) during the transfer. The transfer screw (51) does not wrap around and the transfer becomes smooth, and in this process, the waste collected in the decompression view (55) is packed, gradually lagging in the input port. Since it is supplied to the thermal decomposition chamber (10) through (13), waste plastic is filled in the decompression pipe (55) by compression from this process, and external air enters the thermal decomposition chamber (10) through the inlet (13). Inflow will perform the function controlled.
In this way, the air inflow is blocked at the pressure reducing inlet (50) and the pressure reducing discharge part (60) is also temporarily blocked by the vacuum pump (70) connected to the outlet (15) and operated. By depressurizing the inside of the pyrolysis chamber (10) and maintaining the low acidity state, a normal pyrolysis action can be performed.
The waste plastic put into the three-stage pyrolysis chamber (10) is transferred by the transfer screw (11) rotated by the driving means (82) and passes through the connecting passage (13) to obtain the second and third pyrolysis chambers. In step (10), the pyrolysis action is carried out by the high heat of the heating chamber (20) to which high heat is supplied by the burner (40) from the transferred process, and the lower pyrolysis chamber ( 10) If the treated waste coming out via 10) is sent to the decompression section (62) by the transfer screw (61) of the decompression discharge port (60) connected to the outlet (15), the decompression section (62) As a result, the waste collected in the form of treated ash is packed and gradually discharged to the outside, and the waste plastic treated in the decompression unit (62) is discharged from this process. Filled Therefore, the function of controlling the outside air flowing into the pyrolysis chamber (10) through the outlet (51) is performed. 70) may be turned off if the pressure in the pyrolysis chamber (10) becomes negative from the appropriate pressure.
Through the above process, the waste plastic transferred in stages in the pyrolysis chamber (10) in a low oxygen state with high heat undergoes a pyrolysis action, and a cracked gas such as oily gas generated from this process. Is introduced into the gas gun collection chamber (100) through the exhaust pipes (14) formed on the side of each pyrolysis chamber (10), and the collected gas is liquefied by a separate heat exchange action. It is possible to obtain a liquefied fuel that can be used as a fuel. Residues such as asphalt concrete remaining through a thermal decomposition action are gradually pushed out and discharged.

  As described above, this device can perform the pyrolysis action safely by reducing the pressure of the waste plastic itself rather than mechanically separating and reducing the pressure before putting the waste plastic into the pyrolysis chamber. In addition, it can control the flow of external air into the thermal decomposition chamber even if it is stopped during operation, ensuring safety and simplifying the structure, greatly reducing the manufacturing cost. Of course, there is an effect that maintenance and maintenance are easy.

Is an overall configuration diagram showing the configuration of the present invention Is an enlarged view showing a pressure reducing charging portion in the present invention Is a sectional view taken along line AA in FIG. Is an enlarged view showing a vacuum discharge part in the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 10: Pyrolysis chamber 11, 51, 61: Transfer screw 12: Connection channel 13: Input port 14: Exhaust pipe 20: Heating chamber 40: Burner 50: Depressurization introduction part 53: Support body 54: Screw pipe 55: Decompression Tube 60: Depressurization discharge part 62: Decompression part 81, 82, 83: Driving means 100: Gas gun collection chamber

Claims (3)

In the heating chamber (20) that provides a heat source to the burner (40), a transfer screw (11) that is moved by the driving means (82) while being interlocked with the connecting passage (12) is formed in the heating chamber (20). A multiple pyrolysis chamber (10);
The transfer screw (51) driven by the driving means (81) is connected to the inlet (13) of the pyrolysis chamber (10) while the material to be transferred is filled and the inflow of external air is blocked. A pressure reducing inlet (50) equipped with a pressure reducing tube (55);
In the above pyrolysis chamber (10), the pyrolysis gas is collected through each exhaust pipe (14) and sent to a purification facility to be liquefied by heat exchange action (100);
The treated waste plastic produced at the outlet (15) of the pyrolysis chamber (10) is transferred as a transfer screw (61) rotated by the driving means (83), and the waste plastic is packed. Thus, the reduced pressure discharge part (60) equipped with the reduced pressure part (62) so as to block the inflow of external air;
It is characterized by comprising a vacuum pump (70) connected to the outlet (15) and equipped to depressurize the pyrolysis chamber (10), and pyrolysis of polymer wastes Heating device. In item 1,
A polymer waste pyrolysis heating apparatus in which (57) is attached to a transfer guide which is formed on the inner surface of the screw tube (54) at an appropriate interval in the length and direction by the reduced pressure input section (50). Figure 1
Pyrolysis heating device, pyrolysis chamber, reduced pressure input, pressure reducing tube

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