| 摘要 |
PURPOSE:To improve dehydrating capacity by disposing the part of filter cylinder on the large diameter end side of a screw shaft where the pressure dehydration is nearly in limit in an evacuated chamber so that evacuation is made possible. CONSTITUTION:A screw press type sludge dehydrator is provided with a screw shaft 4 which is rotationally driven in a filter cylinder 1. A sludge feed port 11 is provided in the position of the cylinder 1 on the small diameter end side of a screw shaft 4 and a sludge discharge port 12 is provided in the position of the cylinder 1 on the large diameter end side of the shaft 4. The part of the cylinder 1 on the large diameter end side of the shaft 4 is dispose in an evacuated chamber 15. The floor of the chamber 15 is used commonly for a tray 16 for receiving filtrate. The filtrate dropping port of the tray 16 is connected to the upper part of a filtrate tank 17. A vacuum pump 18 is connectd to the upper part of the tank 17 and the inside of the chamber 15 hence the inside of the high pressure part 3 of the cylinder 1 are evacuated by driving of the pump 18. |
