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Wastewater shaftless screw conveyor is a continuous conveying device without a central shaft design. It uses wear-resistant spiral blades to rotate in a U-shaped groove or pipe to push wastewater, sludge or easily entangled materials forward.
Type: Single shaftless/double shaftless
Diameter: 150 - 470 mm
Inclination of installation: 0-15° or 0-30°
Length: 0-20 mt or 0-30 mt
Capacity: from 0.8 mc/h to 45 mc/h
Power: from 0.55 kW to 5.5 kW Speed: 29rpm
Inclination Angle: <30 degrees
Materials of construction: Carbon steel, Hot-Dipped galvanized, 304/316 stainless steel, Hardened alloys, Etc.
Wastewater shaftless screw conveyor with its unique center-shaftless design, completely eliminates the clogging and corrosion issues of traditional conveying equipment. It can easily handle viscous sludge with a moisture content of up to 60%. Its fully enclosed structure ensures leak-free and secondary contamination-free conveying. An optional high-pressure flushing system provides rapid self-cleaning. We also offer customized production equipment, allowing us to tailor-make a suitable shaftless screw conveyor for your specific conveying site, conveying volume, and sludge moisture content.
The wastewater treatment industry places extremely high demands on conveying equipment for corrosion and wear resistance. Wastewater shaftless screw conveyors are primarily available in carbon steel and stainless steel, and require precise selection based on the composition of the wastewater.
Carbon steel shaftless screw conveyor: suitable for low-corrosive sewage and sludge. Its cost is only 30%-50% of that of stainless steel models. It can be lined with rubber or polyethylene plates to increase wear resistance by 3 times. The structure is simple and easy to maintain.
Stainless steel shaftless screw conveyor: suitable for highly corrosive scenes such as chemical wastewater containing acid/alkali/organic solvents, seawater desalination brine, as well as hygienic demand scenes such as food factory wastewater and pharmaceutical fermentation waste liquid, suitable for large sewage treatment plants with a service life of more than 10 years.
The Wastewater Shaftless Screw Conveyor's shaftless, tangle-resistant design easily handles high-water-content, viscous sludge. Its corrosion-resistant stainless steel construction allows for high-angle conveying, increasing efficiency by 50%.
Prevent leakage: The fully enclosed U-shaped design prevents wastewater from dripping or odor from overflowing, and prevents leakage of high-pressure wastewater.
Strong corrosion resistance: It can adapt to all kinds of corrosive wastewater containing acids, alkalis, salts, organic solvents, etc.
Prevent accumulation and slippage: For high-water content sludge (water content 80%-95%), wide pitch blades are used to prevent material accumulation and slippage.
Customizable: It can design different working conditions such as horizontal, inclined, and vertical. It can recommend the most suitable pipe diameter for you according to the conveying volume to meet the conveying requirements.
The Wastewater Shaftless Screw Conveyor utilizes a centerless design. A motor drives wear-resistant spiral blades to rotate within a sealed tank, enabling continuous and stable conveying of high-water-content, high-viscosity sewage sludge. Its core operating principle is that after sewage material enters the feed port, the rotating spiral blades form a closed propulsion space with the tank's inner wall. The circumferential force of the blades propels the material axially along the tank until it is discharged through the discharge port.
| Model | WLS150 | WLS200 | WLS250 | WLS300 | WLS400 | WLS500 |
| Spiral diameter(mm) | 150 | 184 | 237 | 284 | 365 | 470 |
| Outer diameter(mm) | 180 | 219 | 273 | 351 | 402 | 500 |
| Incline degree(a) | 0 °-30 ° | 0 °-30 ° | 0 °-30 ° | 0 °-30 ° | 0 °-30 ° | 0 °-30 ° |
| Max Length(m) | 12 | 13 | 16 | 18 | 22 | 25 |
| Capacity(t/h) | 2.4 | 7 | 9 | 13 | 18 | 28 |
| Motor | Model | L ≤ 7 | Y90L-4 | Y100L1-4 | Y100L2-4 | Y132S-4 | Y160M-4 | Y160M-4 |
| Power kW | L ≤ 7 | 1.5 | 2.2 | 3 | 5.5 | 11 | 11 | |
| Model | L>7 | Y100L1-4 | Y100L2-4 | Y112M-4 | Y132M-4 | Y160L-4 | Y160L-4 | |
| Power kW | L>7 | 2.2 | 3 | 4 | 7.5 | 15 | 15Notes : The parameter above is just for reference, Model please inquiry us directly. We accept customization. |
From conveying screen residue, draining sedimentation tanks, to feeding dewatering equipment, our wastewater shaftless screw conveyors are fully compatible with every stage of wastewater treatment. Featuring a modular design and customizable materials, they help wastewater treatment plants achieve efficient and energy-efficient sludge processing throughout the entire process!
We use a U-shaped, open-type wastewater shaftless screw conveyor. The trough is sealed with a cover plate at the top and a removable rubber liner at the bottom. The open structure facilitates the removal of larger impurities from the residue, while the rubber liner reduces the adhesion of wet sludge.
The core configuration is a tubular, enclosed wastewater shaftless screw conveyor equipped with a 0-60 rpm variable speed control system. The fully sealed circular tube structure prevents odor from spreading within the dewatering chamber, and the variable speed control allows real-time speed adjustment based on the sludge moisture content. When the moisture content rises from 75% to 85%, the system automatically reduces the speed to 30 rpm to prevent clogging.
The spiral blades are welded with a 3mm-thick tungsten carbide wear-resistant layer, and the trough body is constructed of Cr25Ni20 heat-resistant steel. This upgraded material solution enables conveying dry sludge or incineration ash at temperatures ≤300°C. The wear-resistant layer extends the service life of the wastewater shaftless screw conveyor blades, making it suitable for conveying ash in sludge incineration plants.
The maximum recommended inclination angle of the wastewater shaftless screw conveyor is 30°, but in actual application, it needs to be adjusted comprehensively according to the characteristics of the wastewater, solid content, and viscosity of the material.
0°-20°: Ideal working range, suitable for thin sludge or scum with a water content of ＞90%.
20°-30°: The conveying speed needs to be reduced (10-20rpm), suitable for concentrated sludge with a solid content of 5%-10%.
≥30°: Only for short-distance transportation, and special design is required, such as adding anti-slip blocks).
Traditional shafted screw conveyors often face three major challenges in wastewater treatment: fiber screening residue entanglement around the central shaft, leading to downtime; the risk of blockage during the conveyance of high-water content sludge; and wastewater corrosion, which shortens equipment life. The Wastewater Shaftless Screw Conveyor achieves this breakthrough through three innovative designs.
Shaftless spiral structure: Abandoning the central shaft design, the spiral blades are directly welded to the drive shaft, which completely solves the problem of entanglement of hair, fibers and other debris.
Large pitch blade design: For dewatered sludge with a moisture content of more than 80%, variable pitch blades (front pitch 300mm, rear pitch 250mm) are used to reduce the sludge volume through pushing action, and the conveying efficiency is increased by 40%.
Anti-corrosion and wear-resistant material combination: The spiral blades are made of 316L stainless steel, and the tank is lined with ultra-high molecular weight polyethylene, which has a sewage corrosion resistance 5 times higher than ordinary carbon steel.
During wastewater treatment, fiber impurities can easily become entangled and clogged, severely corroding equipment and causing odor leakage, polluting the environment. High maintenance costs are an urgent issue. The Wastewater Shaftless Screw Conveyor features a shaftless design and large-pitch blades, achieving zero entanglement. Made of materials such as 316L, PP, or titanium alloy, it offers a corrosion-resistant lifespan of over 10 years. Its fully enclosed structure prevents odor leakage, and its unique bearingless design reduces maintenance costs by 70%, providing a fast and reliable solution for comprehensive wastewater treatment.
With prices starting as low as $2,100, the Wastewater Shaftless Screw Conveyor provides a cost-effective wastewater treatment and conveying solution. Prices vary depending on the material, specifications, and features. The basic carbon steel model is economical and suitable for treating low-corrosive wastewater in small and medium-sized wastewater treatment plants. For treating highly corrosive chemical wastewater, 316L stainless steel or duplex steel is used, which increases the price accordingly. Custom features such as variable frequency speed regulation, fully enclosed construction, and enhanced wear-resistant coatings can also affect costs. We support custom orders and provide precise quotes based on processing volume, conveying distance, and operating conditions, ensuring you get the right Wastewater Shaftless Screw Conveyor within your budget.
The industrial Wastewater shaftless screw conveyor has become a benchmark equipment for handling complex materials due to its non-clogging, corrosion-resistant and low-maintenance characteristics. When selecting, it is necessary to focus on material characteristics, conveying volume and environmental requirements, and reasonably match the material and functional configuration to maximize the equipment benefits. For sludge, viscous waste or high hygiene standard scenes, the shaftless screw conveyor is an irreplaceable solution!
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