System and process for heavy fuel oil pyrolysis

A system for continuous processing of heavy fuel oil from recycling waste oil and processing residues of crude oil, comprising:

• at least one rotating kiln comprising an outer stationary jacket which forms a heating channel and an inner rotating reactor configured to recover a solid coke fraction;
• a plurality of spray lances of different lengths configured to distribute via nozzles heavy fuel oil evenly along a longitudinal direction within the rotating reactor, said nozzles configured to produce a spray cone which ensures a non-overlapping spray pattern and an even distribution of the heavy fuel oil in the rotating reactor;
• at least one hot-gas filter receiving process gas from the rotating reactor and configured to separate a filtered process gas from a soft coke fraction;
• at least one condenser that receives the filtered process gas from the at least one hot-gas filter;
• and
• a plurality of gas burners arranged along a longitudinal direction of the rotating kiln and sufficient to evenly and indirectly heat the rotating reactor;
• wherein the rotating reactor comprises scrapers, wherein said scrapers are inclined and are configured to continuously remove accumulated solid coke from an inner wall of the rotating reactor and convert said accumulated solid coke into powdery coke,
• the rotating reactor is inclined at an angle between 2° and 8° in order to continuously discharge the powdery coke from the rotating reactor by gravity,
• the system further comprises a funnel comprising auger plates for discharging the powdery coke from the rotating reactor, and
• said system is configured to operate at a process temperature in a range of 500 to 600° C. measured at the inner wall of the rotating reactor.