Clutchless centrifuge and consistent moisture content with an industrial drive
The dewatering process is based on centrifugal force. The waste water is fed in from the right. Because the bowl is rotating, the water is separated from the solids by centrifugal force. To help the effluent to coagulate, polymer is fed into the process. After the water has been separated from the solids the water is drained off from the pinion shaft end. Because the screw inside the bowl is rotating slower than the bowl, the solids are augered out from the opposite end. In other words, the screw inside the bowl is rotating in relation to the bowl so that it conveys the solids out of the bowl. The difference in bowl speed and conveyor speed determines how fast the solids are augered out from the system.
The dewatering process
Solved Problem
- Maintenance required by the mechanical clutch
- Down time caused by motor tripping
- Accurate control required over the whole speed range
Solution
- Bowl Motor: 75 kW
- Bowl Converter: 75 kW
- Conveyor Motor: 22 kW
- Conveyor Converter: 22 kW
Benefits
- Problems caused by the clutch were eliminated
- No additional control logic outside the drive
- No tachometers required
- More consistent moisture content in the solids