METHOD FOR VARIABLE-FREQUENCY MICROWAVE ENERGY-SAVING CO-PYROLYSIS OF OIL-CONTAINING SLUDGE AND DIGESTATE TO REMOVE TAR BY MEANS OF IN-SITU CRACKING

A method for variable-frequency microwave energy-saving co-pyrolysis of oil-containing sludge and digestate to remove tar by means of in-situ cracking, belonging to the technical field of oil-containing sludge treatment. The method comprises preparing a pyrolysis charcoal catalyst by means of an alkaline solvent activation method; and then adding the pyrolysis charcoal catalyst to a mixture of oil-containing sludge and fermented digestate to perform co-pyrolysis, said co-pyrolysis being carried out by means of using an infrared temperature measurement unit coupled with a variable-frequency microwave pyrolysis unit. Adding the activated pyrolysis charcoal as the catalyst can catalyze the pyrolysis reaction and achieves in-situ removal of tar, and further lowers the activation energy of the pyrolysis reaction. The infrared temperature measurement unit monitors the pyrolysis temperature and feeds same back to a variable-frequency pyrolysis system, so as to regulate the reaction temperature in real time, thus ens