Device for distributing a poly-phase mixture over a bed of a granular solid, comprising a porous jet disturber element

A device for distributing a poly-phase mixture comprising at least one gas phase and at least one liquid phase, said mixture being in downflow mode through at least one bed of granular solid, comprising:

• at least one tray (P) located above one of said beds of granular solid;
• a plurality of mixer conduits (21) for said liquid and gas phases of said mixture, each of said conduits comprising at least one upper cross section for flow (22) and at least one lower cross section for flow (23) allowing the mixture formed inside said mixer conduits to communicate with a bed of granular solid, said mixer conduits being provided with one or more lateral cross sections for flow (26) over at least a portion of their height;
• said upper cross section for flow (22) allowing the majority of the gas phase of said mixture to pass and said lateral cross sections for flow (26) allowing the passage of the liquid phase into said mixer conduits and/or at least a portion of the gas phase respectively, characterized in that at least one jet disturber type dispersive system (28) with a controlled porosity is located below said tray (P) and below the lower cross section for flow (23) and above the bed of granular solid.