Method and Device for Pyrolysis-Based Production of Hydrocarbon Oils Based on Plastic Containing Raw Material

A method for pyrolysis-based production of hydrocarbon oils from a first plastic raw material, comprising the steps of:

• (a) providing a plastic raw material;
• (b) adding a catalyst to the plastic raw material to thereby form a reaction composition;
• (c) charging the reaction composition through an airlock valve (7) to an auger pyrolysis reactor comprising at least two auger reactors (1a, 1b) heated to a temperature within an approximate range of 450-550° C.;
• (d) diverting oil vapours and non-condensable vapours from the auger reactors (1a, 1b) to a condensing device;
• and
• (e) condensing a heavy oil fraction and a light oil fraction from said vapours.

A reactor assembly for pyrolysis-based production of hydrocarbon oils from a first raw material comprising plastic materials, comprising:

• a feeding arrangement for plastic material and at least one additional hydrocarbon containing raw material selected among rubber and wood;
• at least one primary shaftless double-auger (1a, 1b), a helical reactor with variable velocity motors allowing different rotational speed at an outlet relative to rotational speed at an inlet;
• airlock valves (7, 8) at a feeding reactor port and at an exit reactor port;
• a third tubular reactor (1c) downstream of the at least one primary double-auger reactor (1a, 1b);
• a heat box (2) enclosing at least the double-auger reactor (1a, 1b) and the tubular reactor (1c);
• at least one double-stage installation of oil condensers;
• a burner (4) configured for heating the reactor assembly and arranged to be charged by non-condensable combustible gas;
• and
• a boiler (21) configured for generating warm water and steam to condense pyrolysis gases.