Patent ID: 6029588
Filing Date: 2000-02-29
Classification: F23G,F23J,F23L,Y02E,Y10S

Abstract:
A method of treating organic waste material characterized by high ash content and a heat value of about 500 to about 9,000 Btus per pound, comprising:introducing the waste material into a slagging combustor;burning the waste material in the combustor to produce a slag of molten inorganic ash and exhaust gases;removing the slag from the combustor;removing the exhaust gases from the combustor;thereafter treating the exhaust gases to remove a substantial portion of particulate matter from the exhaust gases and to dry the exhaust gases;dividing the treated exhaust gases into more than one portion; andintroducing a first portion of the treated exhaust gases and concentrated oxygen gas into the combustor in a proportion that results in the introduced gases having a combined oxygen concentration of at least 30% by volume.