a high kinetic energy water spraying apparatus wets powdered or granular dry material , particularly hard - to - wet polymers , to provide a lump - free solution of a controlled concentration . a volumetric feeder drops the dry material through a fructoconical upper portion of the apparatus . water is injected tangentially so that the inner surface of the upper portion is completely wetted to prevent buildup of dry material on the surface . a lower portion of the apparatus comprises a cylindrical column which receives dry material from the upper portion . the inner surface of the column includes a series of spray nozzles positioned to produce downwardly sloped and radially inwardly oriented jets of liquid which impinge falling dry material with high energy . the downward slope of the jets creates a downward air flow so that any dust from the dry material is drawn downwardly into the column .