The invention provides a method for successive
catalytic pyrolysis of
mixed waste plastics to produce burning oil, which relates to a technology to produce the burning oil through
pyrolysis of waste plastics. A two-step successive running technology with an integration of catalyzed
pyrolysis and
pyrolysis catalyzed reforming is adopted, in the technology of pyrolysis in the first step, the successive running of the pyrolysis is accomplished through a fluid tube-type
bed technology with an
adjuvant transmission device, and a cheap non-toxic catalyst is added to raise the
reaction speed of the plastic pyrolysis and decrease the temperature of the pyrolysis; in the second step of refining technology of catalyzed
lysis, a fluidized-
bed catalyst is adopted to perform the secondary pyrolysis reforming reaction on the cracked gas produced by step one, to increase the percentage of the extract fractions of
gasoline and diesel in the
liquid fuel produced by pyrolysis. The technology provided by the invention is a wholly concealed successive running procedure with the waste plastics as the
raw material without the need of classification, washing or
drying, the operation is flexible and the running cost is low, the technology is especially suitable for production of burning oil from
mixed waste plastics from urban or suburban garbage with complicated components, the
yield rate of the qualified burning oil reaches to more than 66 percent, as calculated on the basis of waste plastics, the technology has
observable economic and
social benefits.