Continuous pyrolysis method of waste plastic and pyrolysis system of waste plastic

Abstract

Provided is a continuous pyrolysis method of waste plastic, including the following steps: crushing and drying the waste plastic, and then carrying out pyrolysis reaction under an oxygen-free condition to obtain pyrolysis products, where the obtained pyrolysis products include pyrolysis oil and gas, and a pyrolysis solid. A temperature of the pyrolysis reaction remains stable in the range of 450-500° C. for more than 7 days, pyrolysis reaction time is controlled at 30-40 min, and a proportion of the pyrolysis solid in the pyrolysis products is less than 20% by weight. According to the continuous pyrolysis method of the waste plastic and a pyrolysis system of waste plastic, a continuous and stable operation can be kept for a long period of time, the temperature of pyrolysis reaction can be kept stable for a period of up to 28 days, the amplitude of temperature fluctuation is lower than 100° C.

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