Furnace for making high abrasion furnace black or intermediate super abrasion furnace black and process of operating same

摘要

1,147,884. Carbon black furnace. PHILLIPS PETROLEUM CO. 20 April, 1966 [23 April, 1965], No. 17331/66. Heading C1A. A carbon black furnace comprises a cylindrical combustion section (13) having an axial hydrocarbon feed inlet (59) and a preferably tangential fuel inlet (24), and two cylindrical reaction sections (14 and 16) with quench inlets (17 and 18) at their ends, the diameters of the respective sections being at least 2d, d, and (1 1/6-1 2/3)d, and the lengths of the reaction sections being 4¢-5¢ ft., and 8-11 ft., respectively. Suitable diameters for the three sections are 3“ ft., 1 ft. and 1“ ft., respectively. In Fig. 6, hydrocarbon feed from line 43 is preheated at 42 and passed via line 52 to nozzle 59, optionally with additives, e.g. aqueous KCI, from tank 61. Fuel hydrocarbon is passed from line 64 to nozzles 31 in inlets 24; alternatively, the hydrocarbon feed may be used as fuel by opening valve 32. Compressed air from line 39 is preheated at 38 and passed via line 53 to nozzles 29 to burn with the fuel. Some air may be passed via 63 to annular space 12 round nozzle 59. In furnace 11, the hydrocarbon feed is enveloped in an annular stream of hot combustion gas, and yields ISAF black if quenched with water at 17, or HAF black if quenched at 18. The quenches 17 and 18 may have 2 and 4 radial inlets respectively. The product stream is passed through indirect heat exchangers 37 and 41 (to preheat feed and air) and thence to bag filter 46. The hydrocarbon feed is preferably a light oil, e.g. petroleum, coal tar or synthetic gas oil or cracked residue, of specified properties. Particle size and surface area of the product are given.