| 摘要 |
PURPOSE:To provide an apparatus for making suspension in air being suitable for mass production without any retention on a perforated plate. CONSTITUTION:When a plurality of inner cylinders 2 are provided and the region on a perforated plate is divided into a region 15b within the inner cylinder corresponding to the lower position in the inner cylinder, an annular region 15a being out of the inner cylinder corresponding to the lower position being out of the inner cylinder and to a specified distance being a little larger than a half of the distance between the centers of the inner cylinders from the center of the inner cylinder, and an outer annular region 16 positioning out of the annular region 15a being out of the inner cylinder from the center of the inner cylinder, a perforated plate for improving fluidization wherein the rate of aperture is made in the perforated plate so as to have a relation of (the aperture in the region within the inner cylinder)>(the aperture in the outer annular region)>( the aperture in the annular region being out of the inner cylinder), is provided. |
