To provide an improved multiphase mixing device with staged gas introduction.
A mixing system provides improved mixing of quench gas and process fluids in the interbed zone of limited height in a downflow reactor while minimizing pressure loss. The mixing system includes a horizontal collection tray, a mixing chamber positioned below the collection tray, at least one spillway passage for liquid and vapor flow extending through the collection tray into the mixing chamber, and a vapor slipstream passageway extending through the collection tray into the mixing chamber for directing a vapor slipstream from above the collection tray into the mixing chamber. The mixing chamber below the collection tray defines a two-phase mixing volume. The vapor slipstream passageway normally has a plurality of vapor inlets arranged to impart rotational movement to the vapor phase when it enters the mixing chamber. As a result of providing at least one additional passageway for a vapor slipstream, significant reacceleration of the vapor phase is achieved in the mixing chamber resulting in improvement in mixing efficiency of both the vapor and liquid phases.
BOYD SHERRI L
MULDOWNEY GREGORY P
| JPH03505992A | 1991-12-26 |
| US6180068B1 | 2001-01-30 |