PROCESS FOR COOLING HOT PYROLYSIS GAS

摘要

In a multi-stage cooling process for hot pyrolysis gas formed by degassing of plastic wastes or the like in a pyrolysis reactor, the hot pyrolysis gas is cooled by direct heat exchange in the first cooling stage (10) immediately downstream of the pyrolysis reactor. The cooling medium used here is a low-boiling pyrolysis oil which is obtained by condensation of pyrolysis gas in a cooling stage (32) which is located downstream of the first cooling stage. As a result, separate cooling and purifying measures for the pyrolysis oil are unnecessary.