Multi-disk Sludge Dewatering Screw Press/ Sludge dewatering Screw Press for wastewater sludge dehydrator

The multi-plate screw press has solved several technical problems of other similar sludge dewatering equipment including belt presses, centrifuge machines, plate-and-frame filter press have,  which are frequent clogging, low concentration sludge / oil sludge treatment failure, high energy consumption and complicated operation etc.

Factors including concurrent water-power, thin layer dewatering, proper pressure and dewatering path extension etc. were applied by the dewatering mechanism of multi-plate screw press. Lower energy / water consumption and longer service life can realized without changing the properties of the feed materials and with high efficiency.

Application:

The multi-plate screw press can be widely used in municipal waste water treatment engineerings as well as the industrial wastewater treatment systems such as petrochemical processing, light industry, chemical fiber, paper-making, pharmacy and leather etc. The multi-plate screw press, as proven by the practical applications, can help to make considerable economic and social benefits for customers.

Working principle:

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.

Exterior design:
The main body is made of SS304 Stainless Steel, which has good weldability, heatresistance, corrosion resistance and low temperature strength

Interior design:
The fixed ring and the swimming ring are stacked on each other to form a cylinder,and the screw shaft runs through it to form a filtering device





01
SLUDGE TRANSFER PUMP
The sludge in the sludge storagetank is transported to the meter-ing tank through the sludge con-veying pump

02
FLOCCULATION MIXING TANK
The sludge is transported to the floccula-tion mixing tank by metering, and theremaining sludge is returned to
thesludge storage tank by adjusting thewaterlevel

03
BLENDER
The polymer flocculant is in-jected, and the sludge reactswith the polymer flocculantto form flocculant
which istransported to the main bodyofthe screw

04
SCREW CONCENTRATION PART
The sludge is transported to thescrew body, and the sludge is ex-truded and dehydrated by
thestrong extrusion pressure gener-ated by the change of screw di-ameter and pitch

05
BACKPRESSURE PLATEDEHYDRATION
The gap between the movingring and the fixed ring of the de-hydration part Narrows
and thedecement cake is dehydrated by the back pressure plate, and themud cake is discharged