| 摘要 |
PURPOSE:To simplify the structural part immersed in sewage, to reduce troubles, and to facilitate the maintenance and inspection by using a spiral air flow to convey solid particles contg. water at the water bottom, and simultaneously to dehydrate said particles. CONSTITUTION:The air from an air introducing tube 12 provided to the outer tube 11 of a double tube is introduced into a cylindrical body 3 through an outer cylinder 8 and an air supply port 5. Since the air is throttled by a conical body 2, the velocity of the air flow is increased, and a spiral air flow proceeding in the longitudinal direction of a pipeline is formed. Consequently, the solid particles settled at the bottom of a solid-liquid separator 21 are sucked in from a water-contg. solid particle introducing port 7, and conveyed to the outlet of the pipeline. The water content separated in the spiral air flow by centrifugal force flows out from innumerable small holes 91 perforated through the tube wall of a dehydrating mechanism 9, and the dehydrated solid particles are obtained at the outlet of the pipeline.
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