Screw Filter Press
Structural Principle
The Multi-plate Sludge Dewatering Machine is ingeniously composed of a fixed ring, a movable ring, and screw filter components. It masterfully integrates filtration enrichment and pressing technology, enabling sludge concentration and squeezing within a single cylinder. During the concentration phase, the dynamic interplay between the fixed and movable rings rapidly expels water without any blockages. As the volume of the screw cavity diminishes during the squeezing process, the pressure intensifies, efficiently driving out water from the sludge.
Our machine features an innovative filter model that replaces outdated filter cloth and centrifugal methods, simplifying and advancing the solid-liquid separation and self-cleaning technology.
Dewatering Principle
1. Concentration: As the screw axis progresses, the sludge is propelled forward. With the screw's pitch reducing, the volume contracts, consequently escalating the pressure, which forces water out. Under gravitational influence, water flows through the gaps in the movable plate filter.
2. Dewatering: Following concentration, the sludge continues to advance with the screw axis's motion. As the direction of mud cake movement persists, the screw axis's pitch and the spaces between fixed and movable spacers decrease, leading to a reduced screw cavity volume and increased pressure due to the influence of the back plate. This pressure effectively extracts water from the sludge, elevating the mud cake's solid content. Subsequently, water is separated from the sludge.
3. Self-Cleaning: The relative movement between the fixed and movable rings effectively prevents blockages, thus ensuring the machine's self-cleaning capability, a significant advantage over traditional dewatering machines.
Working Process
1. Determine the type of flocculant required and establish the appropriate addition ratio.
2. Prior to commencing dewatering, infuse the flocculant, with PAM dilution at 500-1000 times. The sludge is transferred to the mixed flocculation tank by the sludge pump, while the PAM liquid is delivered by the chemical feed pump. The mixer then blends them to form alumen floc, after which the sludge undergoes the dewatering process, with filter liquid being extracted and returned to the raw water tank.
3. Post-concentration, the sludge is propelled forward by the screw axis's force. Under various forces, the sludge undergoes dewatering in the squeezing process. The filter liquid, characterized by high solid content, is returned to the mixed flocculation tank for further dewatering.
4. After dewatering, the mud cake is expelled from the outlet and transported via conveyor to tippers, subsequently being dispatched to the drying field.
Model List
| Model |
Size (mm) |
Power (kw) |
Dry sludge |
| YM-101 |
2050*750*1350 |
0.92 |
6-10kg/h |
| YM-131 |
2300*830*1350 |
0.92 |
8-15kg/h |
| YM-201 |
2760*850*1600 |
1.12 |
9-25kg/h |
| YM-202 |
2900*1160*1600 |
2.05 |
18-40kg/h |
| YM-301 |
4050*1000*2090 |
2.2 |
40-80kg/h |
| YM-302 |
4200*1350*2090 |
3.3 |
80-160kg/h |
| YM-401 |
4800*1100*2290 |
2.2 |
90-200kg/h |
| YM-402 |
5000*2200*2290 |
3.3 |
150-400kg/h |
Advantage
1. Wide Range of Application
This versatile machine is suitable for municipal wastewater, food industry, beverage industry, slaughterhouses, fish breeding, poultry farming, dyeing and printing, petrochemicals, paper, leather, and pharmaceuticals. It expertly handles the dewatering of high-concentration sludge and can also manage low-concentration sludge, with a minimum concentration of 2000mg/L. Utilizing a low-speed mechanical squeezing method, it efficiently dewaters without filter cloth, mud holes, or reliance on gravity and centrifugal force, effectively managing all types of sludge, including oil sludge, without blockages.
2. No Secondary Pollution
Operating at a rotation speed of approximately 2-3 r/min, it functions with minimal vibration and noise. The multi-plate system self-cleans with minimal water usage, preventing secondary water pollution and containing odors to avoid environmental dispersion.
3. Save Running Costs
This innovative equipment boasts a compact design, eliminating the need for bulky rotary drums and other large components, thus significantly reducing running costs. Employing low-speed screw squeezing technology, it impresses with its energy efficiency, consuming only about 0.1 kWh/kgDS. Its advanced design ensures no blockages, using minimal water for cleaning (approximately 0.03 t/h). Operate seamlessly 24/7 without the constant supervision of workers, paving the way for substantial savings in labor costs.
4. Automatic Working
With state-of-the-art automation, this machine handles everything from sludge suction and chemical liquid addition to mud discharge with ease. Operating effortlessly around the clock, it requires no human intervention, offering true 24-hour autonomous functionality.
5. Self-Cleaning, No Blockage
Ingenious design utilizing the relative motion between fixed and movable rings effectively prevents blockages, ensuring smooth, continuous operation.
6. Long Working Life
Crafted with a compact and lightweight design, this equipment predominantly features corrosion-resistant stainless steel, ensuring enduring durability and longevity.
Only the screw axis and movable ring require occasional replacement.
Grouped Equipment
1. Flocculation System: This robust and efficient system mixes chemical liquid (PAM liquid) with sludge. By adding PAM, it enables the flocculation of sludge, setting the stage for effective dewatering.
2. Automatic Chemical Dosing System: This intelligent system automatically prepares chemical liquid from powder, streamlining the entire process.
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