Volute Screw Press is composed of screw press body, driving device, filtrate tank, mixing system, frame body and etc.
The working principle of volute screw press is divided into three parts: concentration, dehydration, and self-cleaning.
Concentration
When the screw pushing shaft rotates, the multiple fixed and portable plate arranged on the periphery of the pushing shaft move relatively. Under the action of gravity, water is filtered out from the gaps of the relatively moving plate to achieve rapid concentration.
Dehydration
The concentrated sludge moves forward with the rotation of the screw shaft. Along the direction of the sludge cake outlet, the pitch of the screw shaft gradually decreases, the gap between the plates gradually decreases, and the volume of the spiral cavity keeps shrinking. Under the action of the back pressure plate at the outlet, the internal pressure gradually increases. Under the continuous operation of the screw drive shaft, the water in the sludge is squeezed and discharged, and the solid content of the filter cake continues to increase, and finally the continuous dewatering of the sludge is realized.
Self-cleaning
The rotation of the screw shaft pushes the portable plate to continuously rotate. The equipment relies on the movement between the fixed plate and portable plate to achieve a continuous self-cleaning process, thereby cleverly avoiding the common blocking problem of traditional dehydrators.
The main body of the volute screw press is a filter device formed by stacking a fixed plate and portable plate with a screw shaft penetrating through it. The front section is the concentration part, and the rear section is the dehydration section.
The gap formed between the fixed plate and portable plate and the pitch of the screw shaft gradually decrease from the concentration part to the dehydration part.
While the rotation of the screw shaft pushes the sludge from the concentration part to the dehydration part, it also continuously drives the portable plate to clean the filter gap to prevent clogging.
