Home > Products > Filter Press > Sludge Filter Press > Waste water treatment volute screw press sludge dewatering machine
Application : The stacked screw sludge dewatering machine is specially suitable for oily, high-viscosity, colloidal, low-concentration, and acid-base corrosive sludge, widely used in small and medium-sized sludge treatment scenarios such as municipal sewage, food and slaughter, livestock manure, chemical and pharmaceutical, printing, dyeing and electroplating industries.
The screw stacking sludge dewatering machine is mainly used for sludge dewatering, and the moisture content of the sludge can be reduced to 75%-85% after dehydration. This machine are integrated fully automatic control cabinet and the liquid collection tank, which can realize high-efficiency flocculation under the condition of fully automatic operation. It continuously complete the sludge concentration and pressing dehydration work, and which finally return or discharge the collected filtrate。
The recommended sludge concentration is between 2000mg/L and 5000mg/L.
Equipped with a proprietary rotary disc pre-concentration device, it is better at dealing with low-concentration sludge, improving the shortcomings of existing gravity concentration, and achieving high-efficiency concentration of low-concentration sludge.
The integration of flocculation and concentration is completed, and the subsequent dehydration pressure is reduced and the expansion valve is adjusted to adjust the sludge concentration to a better dehydration state.
The dynamic fixed ring replaces the filter cloth, self-cleaning, no clogging, easy to deal with oily sludge.
Under the action of the rotation of the screw shaft, the movable plate of the stacked screw sludge dewatering machine is constantly displaced relative to the fixed plate, so as to realize the continuous self-cleaning process and avoid the common clogging problem of the traditional dewatering machine. Therefore, it has strong anti-oil pollution ability, easy separation and no blockage. And it is equipped with high pressure water gun.
Energy saving and emission reduction, reduce noise pollution
The screw type sludge dewatering machine relies on large-scale equipment such as volumetric pressure dewatering and barrel matching to achieve a low operating speed of 2-4 revolutions per minute. Therefore, the machine can achieve low energy consumption, low water consumption, and low noise. The average energy consumption is only 1/8 of the belt machine, 1/20 of the centrifuge, and the unit energy consumption is only 0.01-0.1 kwh/kg-DS, which can reduce the operating cost of the sewage treatment system.
The main body of the stacked screw dehydrator is a filter device formed by stacking a fixed ring and a moving ring, and the screw shaft runs through it. The front section is the concentration section, and the rear section is the dehydration section. The filter gap formed between the fixed ring and the moving ring and the pitch of the screw shaft gradually decrease from the concentration part to the dehydration part. The rotation of the screw shaft pushes the sludge to be transported from the thickening part to the dewatering part, and at the same time drives the swimming ring to clean the filter seam to prevent clogging.
Screw stacking sludge dewatering machine is widely used in municipal sewage treatment projects and water treatment systems in petrochemical, light industry, chemical fiber, paper, pharmaceutical, leather and other industrial industries. It is suitable for dewatering of high and low concentration sludge. When dewatering low-concentration (2000mg/L~) sludge, there is no need to build thickening tanks and storage tanks, which reduces construction costs, reduces the release of phosphorus and the generation of anaerobic odor.
Unlike traditional dewatering equipment that uses filter cloths or meshes prone to blinding, this machine utilizes a filter cylinder formed by alternating fixed and moving rings through which a screw shaft runs. As the screw shaft rotates, it continuously drives the moving rings to displace slightly against the fixed rings. This constant relative motion dynamically cleans the filtering gaps from the inside out, completely preventing blockages.
Oily, colloidal, and high-viscosity sludges easily clog and blind the filter cloths of belt presses or chamber filter presses, requiring intensive backwashing and frequent downtime. Because the volute screw press features a cloth-free design with swimming/moving rings that mechanically clear oil residues during operation, it possesses superior anti-oil pollution capabilities, allowing for uninterrupted solid-liquid separation.
Yes. The equipment features a built-in proprietary rotary disc pre-concentration device that is highly efficient at handling low-concentration sludge (ideally between 2,000 mg/L and 5,000 mg/L). It integrates flocculation, thickening, and dewatering into a single automated process, eliminating the need to construct costly gravity thickening tanks or storage systems, which also minimizes anaerobic odor generation.
The screw shaft operates at a very low mechanical speed of just 2 to 4 revolutions per minute (rpm). Consequently, the average energy consumption is only about 1/8 of a belt filter press and 1/20 of a centrifuge, with unit power consumption restricted to 0.01–0.1 kwh/kg-DS. It also uses significantly less flushing water due to its self-cleaning design, drastically reducing a plant's ongoing utility overhead.
The machine continuously moves sludge from the thickening section into the high-pressure dewatering section, where the screw pitch and filter gaps gradually narrow to maximize expression. Following this pressing cycle, the moisture content of the discharged sludge cake is consistently reduced to a range of 75% to 85%, preparing it effectively for standard landfill or incineration processes.
