MULTI-PLATE SCREW PRESS

Huading multi-plate screw press are specially designed for dewatering of sludge from water and wastewater treatment, biogas residue and industrial slurries. They are characterized by moderate speed, minimal supervision plus low power, noise and vibration levels. High uptime, easy maintenance and cleaning during operation are other benefits.

Huading multi-plate screw press is more advanced than traditional dewatering systems which can be easily blocked by low concentrated sludge. The screw press allows for automatic continuous sludge flocculation, thickening, dewatering and filtrate discharging. The thickening zone allows the system to process both highly concentrated sludge as well as sludge with a high-water content.

Applications

Municipal wastewater plant sludges – primary, secondary, mixed or digested sludge
Industrial slurries from e.g. food or chemicals production
Biogas residue

Components

Stainless steel Screw, Shaft, Collection Basin, Flocculation Tank, Main Body
Sludge thickening & dewatering zone
Sludge flocculation tank
Filtrate collection tank
Automatic / Automated control panel
Fixed plates and moving plates instead of filter cloth

Working principle

Dewatering takes place in an inclined drum with a wedge wire screen forming the cylinder wall, and an internal screw conveyor. Polymer is dosed and mixed in the dedicated polymer mixing container. The flocculated sludge suspension is then led into the screw press’ inlet and to the first drum section for drainage of free water. Gradually, the sludge suspension increases in dry solids content as it enters into the pressure zone of the drum. By virtue of the counter-pressure created by a restricted outlet, more free water is released from the sludge cake as it progresses towards the outlet. The released water is drained off to the filtrate outlet under the feed inlet. The filtered sludge cakes are pushed forward by the shaft and finally discharged from the end.

Features

Exclusive pre-thickening enables a wide solid concentration ranging from 3,000mg/l to 50,000 mg/l
High efficiency with a small footprint
Low power consumption (less than 5% of a centrifuge)
Very low water usage (less than 1% of an equivalent belt filter press) Self cleaning
No blocking or backwash water
Double nozzles for superior cleaning and rinsing
Able to handle oily sludge as well as fibrous sludge
Sealed system means no odors/bad smell
Wear free
Exclusive screw shaft for sludge thickening and inorganic material