| 摘要 |
PURPOSE:To reduce the length over the entire part of a device and treating time by thickening slurry in the stage of conveying forcibly and quickly the slurry by means of two feed screws provided with multi-thread spiral vanes. CONSTITUTION:When a motor 3 is driven, a feed screw 20 is rotated and a screw 30 is rotated by continuous gears 1, 2. The crude night soil charged into the device flows toward the intermediate of the two feed screws 20 and 30 is conveyed quickly to the rear end by multi-thread spiral vanes 22, 22' and 32, 32'. The thickened night soil compressed by the screw 30 is forcibly pushed into the thickened crude night soil compressed by the screw 20, by which the night soil is compressed like a packing. The packing-like crude light soil is forced to a large- size squeezing screw 40 by the screw 20 and is squeezed by the screw 40 in a large-diameter casing 50 for liquid compression and sepn. The liquid component incorporated into the night soil drops onto a receiving tray 6 for collecting liquid provided in the lower part. The crude night soil after the dehydration treatment is discharged in the form of a solid matter through a discharge port 55 by pushing away an obstacle 60. |
