Patent GB-774543-A (GB)
Title: Improvements in or relating to the separation of solids from mixtures of solids and gases and apparatus therefor
IPC: B01D45/16
Filed: 1954-06-15
Abstract: In the conversion of hydrocarbon oils to olefines &c. by heating the oils in the presence of finely divided solid contact particles, e.g. coke, the gases produced are separated from the solid particles under the action of centrifugal force by passing the mixture through a curvilinear path at such high velocity that the solids are thrown to the outer portion of the path leaving substantially solid-free gases on the inner part <PICT:0774543/IV(b)/1> <PICT:0774543/IV(b)/2> <PICT:0774543/IV(b)/3> from which gases are removed at a plurality of positions in a direction substantially radially towards the centre of curvature of the path and are quenched immediately on withdrawal, e.g. by contact with the crude oil to be converted.  The solids are stripped from residual products adhering thereto by steam fed to the path at a plurality of positions and are separated therefrom in a centrifugal separator.  In the conversion of residual oils to ethylene the oils are heated in a coking zone and the vapour and gases produced are cracked at 110-1500 DEG  F. for 0.05-2 seconds. As shown in Fig. 2, solid particles of 40-400 microns diameter are heated by combustion with air fed through line 15 with or without oil fed through 13.  The combustion gases are removed through line 17 while the hot particles are fed through path 23 with the aid of steam injected at 25 and are mixed with the feed supplied through line 33 on entering the reactor 31 which may be of the fluid bed type.  The reaction products are fed through a curvilinear path as shown in large scale in Fig. 1 from which primary and secondary gaseous products are removed through lines 39, 47 in which they are immediately quenched by liquid oil fed through lines 41, 53.  Solid particles are separated in the separator 45 and returned through line 49 to the burner 11.  In a modified form (Fig. 4) the products from the reactor 113 pass to a spiral separating section 117 making 2.5 turns about a vertical axis and provided with branched withdrawal units 119, 122, quenching sprays 120, 123 and stripping pipes 121, 122.ALSO:<PICT:0774543/III/1> <PICT:0774543/III/2> <PICT:0774543/III/3> In the conversion of hydrocarbon oils to olefines &c. by heating the oils in the presence of finely divided solid contact particles, e.g. coke, the gases produced are separated from the solid particles under the action of centrifugal force by passing the mixture through a curvilinear path at such high velocity that the solids are thrown to the outer portion of the path leaving substantially solid-free gases on the inner part from which gases are removed at a plurality of positions in a direction substantially radially towards the centre of curvature of the path and are quenched immediately on withdrawal e.g. by contact with the crude oil to be converted.  The solids are stripped from residual products adhering thereto by steam fed to the path at a plurality of positions and are separated therefrom in a centrifugal separator.  In the conversion of residual oils to ethylene the oils are heated in a coking zone and the vapour and gases produced are cracked at 1100-1500 DEG F. for 0.05-2 seconds.  As shown in Fig. 2 solid particles of 40-400 microns diameter are heated by combustion with air fed through line 15 with or without oil fed through 13.  The combustion gases are removed through line 17 while the hot particles are fed through path 23 with the aid of steam injected at 25 and are mixed with the feed supplied through line 33 on entering the reactor 31 which may be of the fluid bed type.  The reaction products are fed through a curvilinear path as shown in large scale in Fig. 1 from which primary and secondary gaseous products are removed through lines 39, 47 in which they are immediately quenched by liquid oil fed through lines 41, 53.  Solid particles are separated in the separator 45 and returned through line 49 to the burner 11.  In a modified form (Fig. 4) the products from the reactor 113 pass to a spiral separating section 117 making 2.5 turns about a vertical axis and provided with branched withdrawal units 119, 122, quenching sprays 120, 123 and stripping pipes 121, 122.