Multi Plate Screw Press Sludge Dewatering System

Thickening: When the shaft is driven by the screw, moving rings around the shaft move up and down relatively. Most water is pressed out from the thickening zone and fall down to the filtrate tank for gravity;

Dewatering: The thickened sludge moves forward continuously from the thickening zone towards the dewatering zone. With the pitch of the screw shaft thread getting narrower and narrower, the pressure in the filter chamber increases higher and higher. In addition to the pressure generated by the back-pressure plate, the sludge is greatly pressed and dryer sludge cakes produce;

Self-cleaning: The moving rings rotates continuously up and down under the pushing of the running screw shaft while the gaps between the fixed rings and moving rings are cleaned to prevent from clogging that happens frequently for traditional dewatering equipment.

 

Sludge feeder via pump or inlet hopper into polymer addition is required for flocculation of the sludge and for best capture rate. And then via cylindrical microns wedge wire drum. A controlled variable speed shafted auger transports the solids towards the drum discharge. The auger shaft is tapered with a smaller diameter on the inlet side and a larger diameter on the discharge side.
Consequently, the space between the shaft and drum reduces as the solids reach the discharge side. The counter pressure of the
cone maximizes the dewatering effect.
 

Screw Press Dehydrator Technical Parameters

Screw Press Dehydrator Features

• Automatic continuous operation
• Compact design with flocculation and dewatering
• Low power and water consumption
• Low operation cost
• No filter cloth, no clogging
• No need for sludge thickener
• Easy operation and maintenance
• No vibration and noise

Screw Press Dehydrator Benefits

• Low Running Cost
• Power-use: less than 5% of centrifuge.
• Water-use: less than 0.1% of belt filter press. Polymer: saving around 60%.
• Room: saving more than 60% of the investment for dehydration room.
• Non-clogging
• Self-cleaning with small amount of water.
• Suit for Oily Sludge​

Screw Press Dehydrator Detail