Fractional carbonization of coal

Abstract

Abstract A PROCESS OF PYROLYZING COAL, BY HEATING IT IN A FIRST STAGE FLUIDIZED BED IN THE ABSENCE OF ADDED OXYGEN AND VAPORS FROM COAL PYROLYSIS CONTAINING MATERIAL CONDENSABLE AS OILY LIQUID, AT A TEMPERATURE BELOW THE FUSION TEMPERATURE, BUT SUFFICIENTLY HIGH TO REMOVE SOME VOLATILES FROM THE DRY COAL UNTIL ABOUT 1-10% OF THE DRY COAL ARE REMOVED OVERHEAD AS VOLATILES; IN AT LEAST A SECOND DEVOLATIZING STAGE, PASSING THE THUS TREATED COAL INTO AT LEAST ONE OTHER FLUIDIZED BED AT A TEMPERATURE ABOVE THAT OF THE FIRST BED AND BELOW THE FUSION POINT OF THE SOLIDS FED TO THAT STAGE, IN THE ABSENCE OF OXYGEN FOR A TIME SUFFICIENT TO NEARLY REMOVE ALL OF THE VOLATILES FROM THE COAL CONDENSABLE TO OILY LIQUIDS; DIVIDING THE NEARLY DEVOLATILIZED CHAR INTO A PRODUCT STREAM, A RECYCLE STREAM AND A COMBUSTION STREAM; COMPLETELY BURNING THE COMBUSTION STREAM, ENTRAINING THE RECYCLE STREAM IN THE HOT GASES FROM THE COMBUSTION STREAM, SEPARATING THE ENTRAINED RECYCLE CHAR FROM THE HOT GASES, AND RECIRCULATING THE HEATED RECYCLE STREAM INTO THE FINAL DEVOLATIZING STAGE, AND RECOVERING THE CONDENSABLES FROM THE OVERHEADS FROM THE FIRST STAGE AND ALL OF THE DEVOLATILIZING STAGES.

Inventors

• 👤 Ralph Tracy Eddinger
• 👤 Leonard Seglin
• 👤 John Frederick Jones Jr

Bibliographic Details