Waste plastic heating pyrolysis oil fume recombinant capture device

Abstract

A waste plastic thermal pyrolysis oil fume heavy component capture device is provided in the exhaust pipe of the pyrolysis chamber of a thermal pyrolysis system. The heavy component capture device is equipped with at least one fume separator, including: a fume separation barrel with a fume separation space inside the barrel body, a fume outlet at the upper part of the barrel body connecting to a fume conduit leading to an oil recovery system, and a heavy component outlet at the lower part of the barrel body connecting to a heavy component discharge pipe returning to the pyrolysis chamber; an oil fume conduit inserted into the fume separation space from the upper part of the barrel body, one end communicating with the exhaust pipe, and the other end having a pipe opening near the lower part of the barrel body, and the height distance from the pipe opening to the fume outlet being greater than the diameter of the barrel body; the overall structure, in addition to improving the quality of oil recovery, also reduces or avoids wax (grease) adhesion and blockage in the pipeline of the oil recovery system, reducing maintenance costs or expenses.

Claims

1. A waste plastic thermal pyrolysis fume recombinant capture device, wherein the waste plastic is first passed through a thermal pyrolysis system to generate pyrolysis fume, and then the pyrolysis fume is processed through an oil recovery system to produce diesel, gasoline and gas (methane) for recovery; the thermal pyrolysis system is provided with a heating device on the outer surface of the furnace wall of a thermal pyrolysis furnace, forming a pyrolysis chamber inside, and a stirrer extending into the pyrolysis chamber is provided above the furnace body; the pyrolysis chamber is provided with a feed inlet and a flue gas outlet above, and a slag outlet below; the feed inlet is used to receive the waste plastic falling into the pyrolysis chamber, which is heated by the heating device during stirring by the stirrer to form pyrolysis fume and discharged from the flue gas outlet, while the residue remaining in the pyrolysis chamber after the waste plastic is thermally pyrolyzed can be discharged from the slag outlet; and a flue gas pipe is connected to the outlet end of the flue gas outlet to a recombinant capture device; the recombinant capture device is provided with at least one fume separator; the at least one fume separator includes: A fume separation tank has a fume separation space inside its body. Above the fume separation space is an upper part of the tank, and below is a lower part. The upper part of the tank has a fume outlet leading to a fume conduit connected to the oil recovery system. The lower part of the tank has a heavy component outlet leading to a heavy component discharge pipe connected to the pyrolysis chamber. An oil fume conduit passes through the upper part of the tank and is inserted into the fume separation space. One end of the conduit is connected to the exhaust pipe at the pyrolysis chamber end, allowing the connection of the pyrolysis oil fumes discharged from the exhaust port of the pyrolysis chamber. The other end has a pipe opening facing and close to the lower part of the tank, through which the pyrolysis oil fumes can be released into the fume separation space. The height and distance from the pipe opening to the fume outlet are greater than the diameter of the fume separation tank. The heavy component capture device... At least one soot particle catcher is connected to the exhaust pipe between the at least one smoke separator and the pyrolysis chamber. The at least one soot particle catcher includes: an soot particle catching barrel with a soot particle catching space inside the barrel, a barrel top above the soot particle catching space and a barrel bottom below the soot particle catching space, and a soot particle catching section between the barrel top and the barrel bottom, dividing the soot particle catching space into an upper space and a lower space. The barrel body of the lower space is provided with a smoke inlet that communicates with the exhaust pipe. The barrel top is provided with a smoke outlet that communicates with the oil fume duct of the at least one smoke separator, and the barrel bottom is provided with a soot particle outlet that connects to a soot particle discharge pipe leading to the pyrolysis chamber. Furthermore, the soot particle catching section is provided with multiple partition layers, and each of the multiple partition layers is provided with a guide plate layer to form multiple tortuous channels.

2. The waste plastic heating and pyrolysis oil fume recombinant component capture device as described in claim 1, wherein, The height distance from the opening of the fume duct to the fume outlet is 1.2 to 1.8 times the diameter of the fume separation barrel.

3. The waste plastic heating and pyrolysis oil fume recombinant component capture device as described in claim 1, wherein, An oil fume heater is provided on the surface of the body of the smoke separation barrel, which corresponds to the opening of the oil fume duct, so that a heating zone is formed at the opening of the smoke separation space.

4. The waste plastic heating and pyrolysis oil fume recombinant component capture device as described in claim 1, wherein, The surface of the ash particle capture barrel is provided with a heater between the smoke inlet and the ash particle capture part, so that the lower space forms a heating zone.

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