SYSTEM HAVING FOAM BUSTING NOZZLE AND SUB-SURFACE MIXING NOZZLE

摘要

A surface foam diffuser and digester tank system prevents and/or suppresses the formation of foam during digestion. The system includes a first nozzle disposed above a top surface of the at least partially liquid contents, a splash plate positioned adjacent to the first nozzle outlet, and a second nozzle disposed below the top surface of the at least partially liquid contents for suppressing foaming in the large processing tanks. The system nozzles each have an inlet for receiving pressurized liquid and an outlet for ejecting a liquid stream into the tank, the depth of the second nozzle and the direction of the liquid stream there from being such that rotation of the top surface is facilitated. The spray of the first nozzle, as dispersed by the splash plate, reduces foam on at least a portion of the top surface, with the rotation of the top surface bringing each portion of the top surface to eventually fall within the reducing spray.

主权项

1. A tiered nozzle system for suppressing foam on a top surface of fluid material substantially filling a large digester tank, the system comprising:
a first nozzle positioned to remain above the top surface of the fluid material when the digester tank is substantially filled, the nozzle having an inlet for receiving pressurized liquid and an outlet for discharging a liquid stream into the digester tank; a splash plate positioned below the outlet of the first nozzle such that the splash plate contacts a discharging liquid stream at an angle of inclination relative to the stream direction to thereby deflect at least a portion of the stream upward and disperse the liquid stream over a greater portion of the top surface than the liquid stream would otherwise cover without a splash plate; and a second nozzle disposed below the top surface of the at least partially liquid contents, the second nozzle having an inlet for receiving pressurized liquid and an outlet for discharging a liquid stream directly into the fluid material, the position of the second nozzle and the direction of the discharged liquid stream being such that rotation of the top surface is facilitated.