| 摘要 |
<p>PURPOSE:To granulate a large amount of particles to a uniform product efficiently by a method wherein an air stream distributing means for a fluidized bed, and a fine liquid particle distributing means or the like are provided under the bottom of an air permeable bed and said described fine particles are supplied along with an air stream so as to adhere each particle of a powdery particulate material. CONSTITUTION:An air exhausting port 2 is provided to a top portion of a container 1, an air permeable bed bottom 8 partitioning a lower limit of a fludized bed to a downward portion of a space for separating solid and air and air stream distributing chambers 10 and 12 for a fluidized bed thereunder. Plural funnel like bodies 6 are connected to above described distributing means and the upper portion thereof is formed as an inverted conical standard 7 and opened to a bottom plate 8 and arranged in parallel. An adhesive fine particle substance such as urea or the like is supplied from a throwing port 4, a molten urea liquid from a pipe 13 and air with a predetermined pressure from pipes 15, 16 and injected through the funnel like bodies 6 to incorporate said particles into the air stream and, during flowing for very short time, the adhesion of fine particles is repeated by cooling, drying or solidifying to form an adhering layer with predetermined thickness and said layer is exhausted from an exhausted pipe 5.</p> |
