Compared with the traditional volute screw press dewatering machine, screw sludge thickener is also advanced in the low operating & maintenance cost, dewatering performance, smell protection, low noise, automatic control, etc. The sludge from the secondary sedimentation tank can be condensed rapidly and continuously, and the sludge concentration can be adjusted between 90% and 96% stably after being condensed and separated. The device has many advantages such as no need concentrated tank, small footprint, less cost. Further more, it can effectively reduce the release of the odor & phosphorus caused by sludge concentrated tank, simplify the following treatment process, greatly increase the capacity of sludge dewatering and deep dehydration equipment.
Screw sludge thickener mainly consists of concentrating body, driving device, filtered water tank, mixing system and frame, etc. During operating, the sludge is pumped into the mixing tank by sludge pump, meanwhile, dosing pump feeds the mixing tank with prepared polymer quantificationlly. The sludge is mixed completely with the polymer by the stirring of motor in the mixing system, then alumen ustum will be produced. When the liquid reach the level of liquid level sensor, the screw body will get into operation, in which the sludge is being pressed. The thickened sludge will be discharged at the outlet gradually and the filtered water will come out between the fixed ring and moving ring at the same time.
All in all, screw thickener adopt the principle of screw extruding to thicken the sludge through the high pressure generated by the screw distance changes and small gap between the mobile ring & fixed ring.
Large sludge concentration range, applied water content of sludge: 98%-99.8%
The water content after thickened is 90%-96%, which can be adjusted stability
High concentration efficiency, small footprint
No need filter cloth, high pressure back water rinsing, self-cleaning, clog free
Low rotating speed, low noise, low power consumption, compact design
Enclosed working, odor emission is controled
Less wearing parts, easy to operate & maintain
Fully-automatic control, low labor need
It is the pre-treat device of sludge deep dewatering, also as the auxiliary equipment of high pressure plate and frame filter press, membrane filter presser.
Instead of condensed tank, work as the pre-treat device of the sludge dewatering system.
Sludge dewatering in the municipal & industrial wastewater treatment system.
Solid and liquid separation in the municipla & industrial wastewater treatment system.
Other wastewater treatment applications in the municipal & industrial wastewater treatment system.