| 摘要 |
An apparatus for coating discrete solid particles has one or more coating units, each comprising an upward directed nozzle (5), an annular opening (6) around the nozzle, wall means (7), such as a vertical pipe, above the opening but spaced therefrom, and gas guiding walls (9) below the annular opening for accelerating a gas stream flowing towards said opening. Between said guiding walls means (10) are arranged for imparting a swirling flow to said gas stream. Thereby the particles are coated while being conveyed in a swirling gas flow. The coating quality is improved and operation facilitated.
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