PROCESS AND APPARATUS FOR PRODUCING CARBON BLACK

摘要

1530379 Carbon black ASHLAND OIL Inc 23 Dec 1976 [29 Dec 1975] 53798/76 Heading C1A In a process for the production of tread grade rubber reinforcing carbon black in which precombusted fuel gas enveloping a centrally confined spray of normally liquid hydrocarbon feedstock is introduced into a tubular reaction zone 125 to effect therein the thermal decomposition of the hydrocarbon feedstock into carbon black, the liquid hydrocarbon feedstock is introduced into the reaction zone from a plurality of axially disposed spray means 18 which are contiguous to the entrance of the reaction zone. The liquid hydrocarbon feedstock may be introduced into the reaction zone from an injection assembly comprising a housing member 10 having downstream 16 and upstream 19 closure ends and equipped with means 11, 12, 13, 14 for cooling the interior confines thereof, a first metallic tubular feedstock supply line 15 positioned within the housing member and projecting beyond the downstream and upstream closure ends, the downstream projection terminating with spray means, and a plurality of metallic tubular feedstock supply lines positioned within the housing member and disposed parallel in relation to the first feedstock supply line within the housing member and projecting beyond the downstream and upstream closure ends, the downstream projections being shaped so they may be disposed helically about the corresponding projection of the first feedstock supply line and terminating with spray means and each of the plurality of metallic tubular feedstock supply lines being individually adapted to be rotated so that the position of the spray means may be varied radially with respect to the spray means of the first feedstock supply (Figs. 2 and 3). Supply lines 17 may be rotated by means of lever arms 20 and clamped by set screws 21. In the furnace shown, preheated combustion air flows via plenum 120 and conduit 121 to combine with fuel gas from jets 122 and form combustion products which are deflected by deflector element 123. The injector extends through the upstream wall of the combustion chamber 124 through packing gland 129 and gate valve 128.