| 摘要 |
PURPOSE:To prevent the co-rotation of a dehydrated solid material and spiral shafts provided with multiple spiral vanes having opposite spiral inclinations and to reduce the length of a device by rotating said spiral shafts in a casing for thickening and providing successively a line of liquid squeezing shaft to one of said shafts. CONSTITUTION:A feed spiral shaft 6 rotates in a direction (a) in a casing 1 for thickening consisting of a porous cylindrical body having a cocoon shaped sectional shape and a feed spiral shaft 7 rotates in a direction (b). The crude night soil, etc. charged into the casing through a feed port 2 flows toward the intermediate part of the shafts 6, 7 and is transferred to the rear end part by means of multiple spiral vanes 8, 9. The liquid content flows down onto a receiving tray 25 for collecting liquid through small holes 3 during this time. The thickened night soil fed by the shaft 7 is forced into the thickened night soil fed by the shaft 6 in the rear end part and is forcibly fed into a casing 14 for solid-liquid sepn., so that the night soil is compressed by a liquid squeezing spiral shaft 12. The liquid component drops onto a receiving tray 26 for collecting liquid and the crude night soil after the dehydration treatment is discharged through a discharging port 18 by displacing a resistance 20 against a spring 21. |
