METHOD FOR PROCESSING POLYMER-CONTAINING WASTE, e.g. TYRES

摘要

Tyres (T) broken up in a crusher (1) and mixed with non-combustible materials (I) are fed into a reactor (4) where they pass downwards through pyrolytic (5), coking (6), combustion (7) and cooling (8) areas. The solid residue (R) is withdrawn at a selected rate to stabilise the level of the combustion area (7). A counterflow of gas is generated by injecting an oxidising gas (A) into the bottom of the reactor and withdrawing a gaseous pyrolysis product (G) from the top of the reactor. The pieces of tyre are relatively large and pile up gravitationally in the reactor. The feed-in rate of gasifying agent, the mass ratio between the gasifying agent feed rate and the consumption of the feedstock, the composition of the gasifying agent and/or the composition of the feedstock are adjusted so that the maximum temperature inside the reactor is kept at 800-1700 DEG C and the temperature of the discharged gaseous product is lower than 250 DEG C. Efficiency and productivity may thus be improved.