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    • 1. 发明授权
    • Carbon black process and apparatus
    • 炭黑工艺和设备
    • US2809098A
    • 1957-10-08
    • US53800155
    • 1955-10-03
    • PHILLIPS PETROLEUM CO
    • LARSON HAROLD A
    • C09C1/50
    • C09C1/50
    • In an arrangement of two or more furnaces, for the continuous production of carbon black from an oil, having a common oil supply and carbon black recovery means, each furnace having an oil feed pipe terminating in an injection nozzle having a ring of diverging apertures, the oil feed to each furnace oil feed pipe is periodically replaced by oxygen-containing gas so as to burn off deposited carbon, one or two furnaces being thus treated at a particular time while the remainder continue to produce carbon black. The flow of oxygen-containing gas in each oil feed pipe may continue for 15-60 minutes. During carbon black production the oil, which may be preheated, may be injected into the furnace at a temperature above 500 DEG C., e.g. 725-775 DEG C. As shown, air and oil are supplied alternately from lines 38 and 36 respectively to a pre-combustion chamber 14 via an oil feed pipe 18 and nozzle 22 having a ring of diverging apertures 24. Simultaneously air is injected as an annular stream around the nozzle via inlet 26 and a combustible mixture of air and fuel gas is injected tangentially into chamber 14 from one or more burners 16. Reaction to produce carbon black is continued in chamber 15. During burning off of deposited carbon the rates of injection of annular air and tangential mixture of air and fuel gas may be different from those during carbon black production. Fig. 3 (not shown) illustrates an arrangement of five furnaces.