Waste plastic pyrolysis unit

Abstract

This invention relates to a waste plastic pyrolysis device, particularly to a pyrolysis device for waste plastic materials, and more specifically to a technique for batch heating and gradual decomposition of waste plastic materials to achieve increased production efficiency and energy savings. The device primarily utilizes a primary pyrolysis unit with multiple heat-conducting layers covering its outer diameter. Each heat-conducting layer is surrounded by a heating layer. An air pump is provided outside the unit and connected to an extraction layer inside. An extrusion die is connected to the end of the unit, and the extrusion die is connected to a discharge pipe. The discharge pipe is connected to the inlet of the main pyrolysis furnace, allowing molten plastic waste to enter the pyrolysis reaction chamber. A heating device is installed around the periphery of the pyrolysis reaction chamber. An oil output pipe is located at the top of the pyrolysis reaction chamber to discharge the pyrolyzed gas and pyrolysis oil. A conveying pipe is located at the bottom of the pyrolysis reaction chamber, and the slag outlet of the conveying pipe is connected to a slag discharge assembly to discharge the carbon black produced after the pyrolysis reaction. Thus, by using a batch heating method, a pyrolysis device that increases production efficiency and saves energy is achieved.

Claims

1. A waste plastic pyrolysis device, mainly comprising a conveyor belt, a primary pyrolysis machine, and a main pyrolysis furnace, wherein: A conveyor belt, which feeds waste plastic into a hopper and transports it forward; a primary pyrolysis machine, which has a cylindrical body supported by a frame, containing a conveying screw, and a hopper at the front of the body for feeding the waste plastic conveyed by the conveyor belt into the machine; the outer diameter of the machine body is covered with multiple heat-conducting layers, each with a heating layer outside; an extrusion die is connected to the end of the machine body, and the extrusion die is connected to a discharge pipe; a main pyrolysis furnace body, the pyrolysis... The main furnace body is equipped with a feed inlet, which is connected to the discharge pipe of the primary pyrolysis machine. The molten plastic waste can be fed into the pyrolysis reaction chamber. A heating device is installed on the periphery of the pyrolysis reaction chamber to discharge the gas and pyrolysis oil after pyrolysis. A conveying pipe is installed at the bottom of the pyrolysis reaction chamber, and the slag outlet of the conveying pipe is connected to a slag discharge group. The slag discharge group is connected to the slag outlet by a first discharge gate. The bottom end of the first discharge gate is connected to a slag stop section, and the bottom end of the slag stop section is connected to a second discharge gate to discharge the carbon black produced after the pyrolysis reaction.

2. The waste plastic pyrolysis device as described in claim 1, wherein, The heat-conducting layer of the initial stage pyrolysis machine is filled with heat-conducting oil.

3. The waste plastic pyrolysis device as described in claim 1, wherein, The heating layer of the initial stage pyrolysis machine contains an electric heating element.

4. The waste plastic pyrolysis device as described in claim 1, wherein, The heating layer of this initial stage pyrolysis machine contains hot air.

5. The waste plastic pyrolysis device as described in claim 1, wherein, The primary pyrolysis machine is equipped with an extraction layer inside its body.

6. The waste plastic pyrolysis device as described in claim 5, wherein, The extraction layer is connected to an air pump located outside the primary pyrolysis unit, which can expel air and moisture from the unit.

7. The waste plastic pyrolysis device as described in claim 1, wherein, A heating device, which is an electric heating element, is installed on the periphery of the pyrolysis reaction chamber.

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