METHOD AND APPARATUS FOR THERMAL REPROCESSING OF PLANT MATERIALS Russian patent published in 1998 - IPC

FIELD: forestry engineering, in particular, wood and agricultural waste pyrolysis. SUBSTANCE: method involves charging material into hermetically sealed chamber; providing thermal reprocessing of material in natural gas, which had been preliminarily heated to temperature exceeding 150 C, with gas and material weight ratio being 0.25-0.5. Hermetically sealed chamber is positioned within heat-insulating layer in spaced relation to it, with space being filled with refractory heat-conductive spherical members. Inner surface of metal hermetically sealed chamber is provided with vertical ribs. Rib surface area is equal to metal chamber inner surface area or exceeds it by about two times. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 10 cl, 2 dwg