Patent GB-1062082-A (GB)
Title: Production of carbon black
IPC: C09C1/52
Filed: 1964-03-31
Abstract: <PICT:1062082/C1/1> <PICT:1062082/C1/2> <PICT:1062082/C1/3> In a process for producing carbon black by allowing a multiplicity of horizontally arrayed, vertically directed flames to burn in a chamber in a controlled air supply so as to deposit black on an adjacent receiving surface, all of the air is introduced into the chamber below the flame zones defined as the space surrounding each flame and enters the flame zone as upwardly moving columns of air, horizontal movement being inhibited by directing all the air through a plurality of vertical passageways each passageway extending from beneath a burner nozzle and extending upwardly to adjacent the burner nozzle, each passageway directing air to a flame zone whereby all of the air introduced into the chamber passes through a flame zone.  The air is preferably at atmospheric pressure and the receiving surface is preferably a reciprocating collecting plate. The apparatus used for the above process comprises a burner arrangement utilizing an air supply system fulfilling the conditions set out above, a collecting surface, a means for removing the deposited carbon from this surface and collecting the carbon so removed, and a housing for containing these items.  In the preferred system, the burners are divided into compartments-burner boxes-each with its own air supply and one or more of these boxes are arranged as units and arrayed alternately along the length of the housing with hoppers for collecting the carbon black formed.  In a burner box (see Fig. 7) the air from duct 38 is dispersed evenly by plate 29 beneath the criss-cross array of plates 57 and 58 which form the necessary vertical passages of the invention. The gas pipe 39, 43, 44, 45, 46, 47, 48, 49, 50, the horizontal main 52, the risers 53 and the burner pipes 54 are arranged so that burners 55 are situated in the spaces defined by plates 57 and 58.  The collecting plate may consist of the usual assembly of channel beams supported by transverse girders and reciprocated about the flames by driving means.  The joints in the channel beams preferably occur at the transverse girders and are preferably staggered across the width of the plate.  In a preferred plate construction (see Fig. 14) the transverse girders 160 are of a box construction and the channel beams 161 have a central web 162 which fits into slots 160a cut transversely across beam 160.  The portion of web fitting into the beam is pierced by holes 164 by means of which pins or bars 166, 167 hold the channel beams in position. The means for removing carbon from the collector plate preferably comprises a brush, part of which is shown attached to bar 105 in Fig. 7 and a cross-section of which is shown in Fig. 6.  The mounting of the brush, which includes tensioning means and height-adjusting means, are given in Fig. 5 (not shown).  The probe 122 (Fig. 6) is mounted on the side of the hopper F so as to be able to clean the spaces between the channel beam. Alternatively, a brush (see Fig. 12, not shown) may be substituted for the probe.  The carbon black removed by the brush is collected by the hoppers F, part of one of which is shown in Fig. 7.  As is indicated, the hopper is rectangular in plan, one dimension which extends transversely across the housing being long in relation to the other.  In its elevation transverse to the housing the hopper presents a funnel-shape which narrows down to form a duct to the conveyer system which removes the black from the housing.  The housing (see Fig. 1, not shown) may be made portable, and its construction is based on a gas main 10 which rests on the ground and circumscribes the base of the housing.  The main is fitted with a nipple so that it can be connected to a gas supply.  The housing is so constructed that two units with associated burners, hoppers, collecting plates, ducting and conveying means may be assembled in tandem, and the collecting plates reciprocated by a single driving means.