초록 ▼

Bitumen-containing material is processed by distillation with a solid heat-carrier with subsequent gasification of the distillation residue and combustion of the gasification residue in an aerofountain furnace. During gasification, the formed flue gas and ash are heated and part of ash is used as th

Bitumen-containing material is processed by distillation with a solid heat-carrier with subsequent gasification of the distillation residue and combustion of the gasification residue in an aerofountain furnace. During gasification, the formed flue gas and ash are heated and part of ash is used as the heat-carrier. The flue gas and ash are withdrawn from the process simultaneously in the form of their suspension in air, from which the heat-carrier is isolated for the distillation process, the consumption of the heat-carrier being controlled by withdrawing part of the suspension containing fine fraction of ash before the heat-carrier is isolated. The device for realization of the proposed method comprises an aerofountain furnace and is provided with a means for delivering the heat-carrier into the reactor, which is actually a separator with leading-in and leading-out gas ducts and a by-pass gas-duct provided with a controlled valve intended to control the delivery of the aerosuspension through the bypass gas-duct.

대표청구항 ▼

A continuous method of thermally processing a solid bitumen-containing material, comprising: (a) subjecting a mixture containing air and a heat-carrier consisting essentially of hot coke and hot fine ash particles from a previously combusted solid bitumen-containing material to complete thermal dest

A continuous method of thermally processing a solid bitumen-containing material, comprising: (a) subjecting a mixture containing air and a heat-carrier consisting essentially of hot coke and hot fine ash particles from a previously combusted solid bitumen-containing material to complete thermal destruction in an aerofountain-type furnace at a temperature of about from 700°C. to 1100°C. generated by said mixture of heat-carrier and air, to obtain an air suspension consisting essentially of air, flue gas, and hot, relatively fine ash particles; (b) separating the air suspension containing the hot fine ash particles into an air suspension carrying a heavier fraction of the fine particles and an air suspension carrying a lighter fraction of the fine particles; (c) separating the air suspension carrying the heavier fraction of the fine particles from step (b) into an ash for further use as a solid carrier and a residual air suspension containing flue gas and a residue of said heavier fraction of the fine particles; (d) mixing the solid carrier from step (c) with a fresh, dry, and hot solid bitumen-containing material; (e) subjecting the resulting mixture of step (d) to distillation at a temperature of about from 450°C. to 650°C. generated by said mixture until the fresh bitumen-containing material is converted into semicoke and liberated volatiles are removed; (f ) subjecting the resulting product from step (e) to gasification by means of steam-air or steam-oxygen whereby the temperature of said mixture containing the distillation residue is raised to about from 600°C. to 900°C. as a result of the exothermic reaction which occurs in gasifying the combustible components of the semicoke liberating volatiles which are removed and converting the semicoke into coke; (g) recycling the gasification residue as a heat carrier and consisting of hot coke and the hot fine ash particles from the previously combusted solid bitumen-containing material into said aerofountain-type furnace where it is admixed with air and subjected to complete thermal destruction as in step (a) to produce the air suspension of fine particles corresponding to that produced in step (a) which is then recycled as a heat carrier; (h) mixing the air suspension carrying the lighter fraction of the fine particles from step (b) with the residual air suspension containing flue gas and the residue of the heavier fraction of the fine particles from step (c); (i) separating the resulting air suspension from step (h) into an air suspension carrying a second heavier fraction of the fine particles and an air suspension carrying a second lighter fraction of the fine particles; (j) separating the air suspension carrying the second heavier fraction of the fine particles from step (i) into an ash for further use as a second solid carrier and a second residual air suspension containing flue gas and a residue of said second heavier fraction of the fine particles; and (k) mixing the second solid carrier from step (j) with the distillation residue resulting from step (e).