DEVICE OF GENERATING STABLE SPIRAL AIR FLOW IN LINE

PURPOSE:To provide a device which introduces gas into an annular space between an inner and an outer cone body, and generates a stable spiral air flow, which is utilized for conveyance of solid particle and dehydration. CONSTITUTION:When gas is fed in through a gas introduction port 5, the gas flows through an annular space 4 between an outer cone body 1 and an inner cone body 2 from the large size side toward the small size side. The gas is caused to flow in a line 3 with a specified size in a position in the vicinity of the apex of the inner cone body 2 to generate a stable spiral air flow. Solid particle, fed in the line 3 with the aid of a feeder 6 located to the central part of the inner cone body 2, is smoothly conveyed by means of the spiral air flow.