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    Fractional carbonization of coal
    3.
    发明授权
    Fractional carbonization of coal 失效
    煤炭的分类碳化

    公开(公告)号：US3574065A

    公开(公告)日：1971-04-06

    申请号：US3574065D

    申请日：1969-08-05

    Applicant: FMC CORP

    Inventor： EDDINGER RALPH TRACY ,  SEGLIN LEONARD ,  JONES JOHN FREDERICK JR

    IPC: C10B49/22 ,  C10B49/10

    CPC classification number: C10B49/22

    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.

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