Patent ID: 7922870

Claim:
A method of pyrolyzing tyres, comprising the steps of: a) introducing tyres to a pyrolyzer; b) heating the tyres to a temperature ranging from 400° C. to 950° C. directly with a flue gas in cross counterflow; c) pyrolyzing by heating the tyres having a composition including mineral oil and carbon black; d) producing pyrolysis gas containing mineral oil, vapors, gaseous pyrolysis products and flue gas; e) cooling the pyrolysis gas to a temperature ranging from 150° C. to 300° C.; f) dividing the pyrolysis gas into a first pyrolysis gas flow and a second pyrolysis gas flow; g) cooling directly the first pyrolysis gas flow additionally to a temperature ranging from 80° C. to 100° C., condensing the main part of mineral oil contained in the pyrolysis gas; h) separating the condensed mineral oil; i) obtaining a pyrolysis gas mixture by mixing the first and the second pyrolysis gas flows; j) burning the pyrolysis gas mixture with air containing water vapor forming a flue gas with a steam concentration ranging from 15 vol % to 40 vol %; k) cooling the flue gas and dividing it into a first flue gas flow and a second flue gas flow; l) providing the first flue gas flow to the pyrolyzer at a temperature ranging from 600° C. to 950° C. and a humidity ranging from 15 vol % to 40 vol % heating the tyres; m) cooling additionally the second flue gas flow; n) purifying the second flue gas flow from sulfur oxides; o) releasing the second flue gas flow into the atmosphere; p) cooling the carbon black included in the tyres; q) taking the carbon black out of the system as a product.