with capacitors and widerstandskombination working impulsglaetter for telemetry to the impulsfrequenzverfahren

摘要

In fluidized reactions in which agglomerates are formed, said agglomerates, but not the fluidized particles, are removed mechanically through a surface formed below the top surface of the bed by a limited "counter-pressure" PICT:0798502/III/1 acting on said bed. A suitable reactor comprises a grating upon which the fluidized bed is supported and which passes out of an opening through a side wall of the reactor below the level of the fluidized bed, means being provided at the outlet for producing the limited counter pressure. By "counter-pressure" is meant either a gas pressure (illustrated by Fig. 1, not shown), or a pressure obtained mechanically, e.g. by a roller, or a combination thereof (as in Fig. 3). In the latter Figure, a fluidized bed 41 maintained by means of wind boxes 43 is supported on an endless grating 45. Agglomerates falling on to the grating are carried to an opening 46 and meet roller 35 which is vertically movable and permits removal of the agglomerates, whilst fluidized particles remain in the reactor. An enclosure 38 has a gas pressure maintained therein to assist in preventing the fluidized particles from being extracted. S is a water-seal. By reduction of the gas fed from the rear wind-boxes a slope 51 of unfluidized material may be built up; the effective area of the grate may thus be reduced. Also if the grating is spaced from the lateral walls of the reactor, similar non-fluidized slopes are formed. These walls can be cooled. In a second embodiment the roller is omitted and a surface obtained through which the agglomerates are extracted solely by means of the counter-pressure of gas within the enclosure. A damper R is provided to adjust an orifice in the reactor wall 40. The roller may be replaced by a vertically movable shutter. In a further embodiment the grating is circular and rotates about a vertical axis; the end walls of the reactor are then parallel to the radii of the grating at the location of entry and exit. The roller can be replaced by a truncated cone in this case.