|
The Andritz Sludge Screw Press has been tailor-made for dewatering DIP and clarifier sludges.
Benefits:
- Applying for inlet consistencies from 1% to 6% by combining with gravity table
- Sludge throughput up to 180 t/d in one line
- Maximum dryness of 64% reachable
- High pressures possible due to rigid design
- Patented wear shoes to minimize downtime and maintenance costs
- Highest throughput per unit
- Optimum dryness values
- Minimum flocculent consumption due to fully automatic control system (PolyScan)
Operating principle:
The pre-thickened sludge is fed into the inlet chute of the sludge screw press. Through the volutions of the slowly rotating shaft the press cake is moved in the direction of the outlet casing. The sludge is compressed and a pressure is built-up, which causes dewatering to the outside and through the shaft drainage device. The retention time in the press is usually more than 15 minutes. The very high pressures at the end of the screw require the use of patented support baskets. A back-pressure unit allows to build-up a plug quickly after start-up and to fine-tune the press during normal operation. The filtrate is collected in the filtrate tray. The outlet for the shaft drainage filtrate is completely separated in order to avoid any rewetting.
|
