Patent ID: 6589315
Filing Date: 2003-07-08
Classification: F23G,F28D

Abstract:
A method for thermally regenerating the heat exchanger material of a regenerative post-combustion device, which in a housing includes from top to bottom:a) a combustion chamber; b) a section which is divided into several segments filled with heat exchanger material; c) a rotary distributor, which according to its rotary position produces: ca) a connection between an inlet connection for exhaust gas to be purified with a first segment of the heat exchanger material; cb) a connection between a second segment of the heat exchanger material and an outlet connection for purified gas; cc) a connection between a third segment of the heat exchanger material, leading the second segment in rotational direction of the rotary distributor, and a connection for flushing gas; in which method fresh air is heated in the combustion chamber and is fed one after another through all the segments of the heat exchanger material, as a result of which the heat exchanger material is brought to a temperature, at which the contaminants absorbed by the heat exchanger material are released, the air used for the thermal regeneration and heated in the combustion chamber is fed from the combustion chamber via a segment of the heat exchanger material to the bottom and via the rotary distributor to the inlet connection or outlet and is again fed from there into the combustion chamber; the air is kept in the circuit with the rotary distributor stopped until the heat exchanger material in the segment is sufficiently hot and all contaminants are released from this, whereupon this process is carried out in turn for all the other segments; fresh air is added into the circuit in order to increase the oxygen content of the air in the circuit; and excess air is continuously taken away from the circuit and is mixed with fresh air in order to reduce its temperature and is at least partly led to a flue.