Patent GB-744906-A (GB)
Title: Improvements in or relating to a device for producing orientated circular flow of fluid media in reaction chambers or rectifying or contacting apparatus
IPC: B01J8/44
Filed: 1953-03-06
Abstract: <PICT:0744906/III/1> <PICT:0744906/III/2> <PICT:0744906/III/3> <PICT:0744906/III/4> A column in which gases are contacted with liquids and/or finely divided solids, for carrying out chemical reactions, has at least one horizontal contact area with inclined passages through which the gas flows upwardly and on which the gas contacts the liquid and/or finely divided solids passing down the column, the contact area being defined by a number of separately constructed sections each individually carried by vertical supporting means, e.g. by vertical rods or tubes.  The sections may be of triangular, square or other desired shape and the rods or tubes may be attached to the elements at their edges or pass through a hole in a central portion.  When tubes are used for the vertical supports heating or cooling media may be circulated therethrough.  The elements are either formed with inclined passages or may form inclined passages with adjacent elements and the arrangement of the passages may be altered to give any desired flow characteristics on the tray required.  As shown in Fig. 3 contact areas are formed of an assembly of triangular or square elements formed of sheet metal, inclined slots being, e.g. stamped out of the metal.  In areas Z1 the width of the slots is such that the liquid and/or solid material in the area is prevented from passing through the slots by the upward flow of gas, in area Z2 the width of the slots is such that the liquid and/or solid falls into the area below.  As shown in Fig. 6 the sections are formed by series of spaced parallel sloping bars 1 rabbeted at their ends and separated by distance pieces a1, their ends resting on spars 2 which are supported by circular plates 3 secured on vertical rods 4.  A Tshaped beam is supported by adjacent groups of bars 1 to prevent upward movement of the bars 1 and is itself prevented from upward movement by L-members 6 secured to the rods 4.  The rods 4 may be replaced by tubes preferably consisting of two concentric tubes heating or cooling medium flowing down one or the other of the tubes and up the other.  In a further modification, Fig. 12, the sections forming the contact area consist of members 34 which are threaded on vertical rods 31, the passages for the flow of gas and liquid and/or finely divided solids being formed between the adjacent members 34 in the same horizontal plane.  In another modification, Fig. 13, the column comprises a series of double tubes, having an inner tube 13 depending from a plate 17 and an outer tube 12 depending from a second plate 16.  Arranged between the tubes 12 are rods 11 carrying plate elements which define the horizontal contact area, and are supported by members 121. The whole is arranged in a casing 18 having an inlet and outlet for gaseous and solid and/or liquid medium.  Heating or cooling medium is supplied to the space defined by the shell 18 and plate 17 and is removed from the space between plates 16 and 17 by an outlet.