METHOD AND DEVICE FOR OBTAINING GAS FROM WASTE AND USING IT Russian patent published in 1999 - IPC

FIELD: gas formation and waste burning off. SUBSTANCE: method includes waste feed to furnace device where it gets on furnace grate to which air is supplied through different chambers with lower blasting. In first zone, air is brought to chambers with lower blasting in relation higher than stoichiometric one for waste inflammation. In lower-blasting chambers of subsequent zone oxygen is added to air which serves for gas formation. In this case, the above-indicated relation is set below stoichiometric one which brings about waste gasification. Flue gases arising in this case get into second furnace device through gas-outlet channel. In this device gases are burnt off with relation exceeding stoichiometric one. Gases formed in this case are delivered to heat exchanger. Method and device ensure gas formation at low temperatures, exclude formation of pyrolytic coke in slag and prevent intensive slag formation. EFFECT: stable gas-formation process. 17 cl, 1 dwg