Patent ID: 7708963

Claim:
A method for treating waste gas with at least one regenerative thermal afterburning system, comprising at least four regenerators filled with ceramic heat accumulator bodies and connected to a common combustion chamber, the waste gas being admitted in a first phase, at least to a first said regenerator, whose heat accumulator bodies have been preheated, in order to burn the waste gas in the combustion chamber to yield clean gas, the clean gas being extracted by at least a second said regenerator, with simultaneous heating of the said heat accumulator bodies of said second regenerator, and with at least a third said regenerator that is flushed with said clean gas that is extracted from the combustion chamber as extracted flush air, the extracted flush air then being admitted to the waste gas, and in a second phase, the waste gas being admitted to the second regenerator, whose heat accumulator bodies were heated during the first phase, in order to burn the waste gas in the combustion chamber to yield clean gas, the clean gas then being extracted through the third regenerator with simultaneous heating of the heat accumulator bodies of the third regenerator, the first regenerator being flushed with said clean gas that has been extracted from the combustion chamber as extracted flush air, and the extracted flush air being admitted to the waste gas, with the waste gas, in a third phase, being admitted to the third regenerator, whose heat accumulator bodies were heated in the second phase, in order to burn the waste gas in the combustion chamber to yield clean gas, the clean gas being extracted by the first regenerator with simultaneous heating of the accumulator bodies of the first regenerator, the second regenerator being flushed with said clean gas that has been extracted from the combustion chamber as extracted flush air, the extracted flush air being admitted to the waste gas, with the first, second, and third phases being repeated continuously, and at least one remaining fourth said regenerator extracting the clean gas from the combustion chamber, said clean gas then being admitted to the waste gas via a fan in order to remove deposits from the heat accumulator bodies of the fourth regenerator by means of pyrolysis in a pyrolysis process, and the clean gas then being burned again in the combustion chamber together with the waste gas.