Abstract: A nozzle for use in delivering a primary fluid having solids in solution or suspended therein which gives the fluid nozzle-caking tendencies. The nozzle has a first passage through which the primary fluid passes and a second passage through which a purging fluid passes, each passage terminating at an exit orifice. The orifice of the first passage is unrestricted and the orifice of the second passage has means for distributing the purging fluid in a manner to form a low velocity fluid buffer to inhibit caking of the solids of the nozzle due to reverse flow of the primary fluid caused by a circulating action thereof immediately after leaving the exit orifice of the first passage.

Abstract: A waste disposal system for radioactively contaminated salt solutions that includes a reaction chamber for interacting the contaminated salt solutions with a fluidized particulate bed to agglomerate salt molecules into bed-sized particles is illustrated herein. Excess bed material is removed during operation by an air flow pipeline system that includes two intersecting pipeline branches. One branch defines a gravity flow exit pathway for particulate bed material reaching a preselected level in the chamber, and the other provides an exit pathway for air and fine particles near the top of the chamber. Air flow through the exit pipeline branches causes fluidic mixing of fine particles with the larger bed-sized particles at the intersection of the two branches. The mixed particles are agglomerated by a centrifugal separator that also removes the particles from the air flow and deposits them into a storage container.