Patent ID: 6401633
Filing Date: 2002-06-11
Classification: F23G,F23J,F23L,Y02E,Y10S

Abstract:
An apparatus for treating organic waste material characterized by high ash content and a heat value of about 500 to about 9,000 Btus per pound, the apparatus comprising:a slagging combustor for burning the organic waste material to produce a slag of molten inorganic ash and exhaust gases; a cooler in fluid communication with the combustor, the cooler receiving the exhaust gases from the combustor and cooling the exhaust gases; a condenser in fluid communication with the cooler, the condenser receiving cooled exhaust gases from the cooler and drying the cooled exhaust gases; a condenser gas output conduit in fluid communication with the condenser; an exhaust gas recirculation conduit in fluid communication with the condenser gas output conduit and the combustor, the exhaust gas recirculation conduit receiving a first portion of cooled and dried exhaust gases from the condenser gas output conduit and recirculating the first portion of cooled and dried exhaust gases to the combustor; a source of concentrated oxygen gas in fluid communication with the combustor for adding concentrated oxygen gas to the combustor; and an oxygen sensor for measuring the amount of oxygen in gases entering the cooler, wherein the source of concentrated oxygen gas includes a valve responsive to the oxygen sensor, the valve being suitable for regulating a flow of concentrated oxygen gas to the combustor in response to the oxygen sensor.