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Shaftless Screw Conveyor for Sludge in Thermal Power Plants is designed for conveying viscous, easily agglomerated, and impurity-containing materials such as sludge and mixed sludge from thermal power plants. It uses an integrated, centerless spiral blade design with a fully enclosed U-shaped trough, effectively preventing sludge from entangled in the shaft and clogging the equipment. Single units can reach 30 meters in length, with a pipe diameter of up to 800 mm and a processing capacity of 458 m³/h. The added sealing cover prevents sludge leakage and odor diffusion, meeting the environmental protection requirements of thermal power plants.
The Shaftless Screw Conveyor for Sludge in Thermal Power Plants enables continuous and automated sludge transfer from filter presses and sedimentation tanks to sludge storage silos or incinerators, eliminating material entanglement and clogging. Its fully enclosed structure prevents leakage and odor.
Reliable Transport: Designed for gypsum sludge or water treatment sludge generated by desulfurization systems in thermal power plants. The central shaft structure fundamentally prevents material entanglement and clogging, ensuring a stable and continuous flow of sludge from the upstream dewatering equipment outlet to the downstream collection point.
Clean Production: The fully enclosed conveyor effectively prevents dust, odor diffusion, and wastewater leakage during sludge transportation, meeting the stringent environmental requirements of thermal power plants.
Seamless Integration: As a crucial link between sludge dewatering and sludge transportation/disposal, its continuous and stable operation directly determines the smoothness and reliability of the entire sludge treatment line, making it a vital component for the continuous and rapid operation of the power plant's conveying facilities.
Anti-clogging and anti-entanglement: The shaftless helical blade design fundamentally avoids the problems of viscous sludge entanglement on the shaft and impurities clogging the equipment, reducing the frequency of equipment downtime for cleaning.
The Shaftless Screw Conveyor for Sludge in Thermal Power Plants uses a shaftless helical blade as its core, combined with a fully enclosed U-shaped trough, an explosion-proof drive system, and sealed inlet and outlet devices. The integrated shaftless blade avoids entanglement problems, and the U-shaped trough is equipped with a sealing cover to prevent leakage.
Shaftless Helical Blades: Utilizing an integrated shaftless design, the blades are made of wear-resistant and corrosion-resistant stainless steel or wear-resistant alloy steel. The blade pitch is adapted to the viscous characteristics of sludge, concentrating thrust and eliminating the risk of entanglement.
U-shaped Trough: The main body is a U-shaped structure, equipped with a removable sealing cover to prevent sludge leakage and odor diffusion; the inner wall of the trough can be fitted with wear-resistant lining plates to enhance erosion resistance.
Explosion-proof drive: Composed of an explosion-proof motor, a hardened gear reducer, and a coupling, providing stable power output and variable frequency speed control based on sludge conveying volume.
Infeed/Discharge device: The feed inlet is designed with a large-diameter trumpet shape to easily receive sludge discharged from the filter press; the discharge outlet is equipped with an anti-backflow baffle to prevent sludge backflow.
The Shaftless Screw Conveyor for Sludge in Thermal Power Plants operates on a screw-push principle. Its core utilizes the rotational force of an integrated shaftless screw blade to transport the sludge. Upon startup, the explosion-proof drive system drives the blades to rotate at a uniform speed within a fully enclosed U-shaped tank. The viscous sludge discharged from the filter press enters the tank through the large-diameter feed inlet. Under the combined action of the blade thrust and the friction of the tank's inner wall, the sludge continuously moves forward along the helical lead direction of the blades, ultimately being discharged through the discharge outlet into a sludge storage silo or incinerator.
| 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. |
A large coal-fired power plant customer, to meet ultra-low emission requirements, generates approximately 80 tons of high-viscosity sludge daily from its desulfurization and wastewater systems. The original equipment suffered from severe clogging and wear issues. For the viscous sludge with a moisture content of approximately 20%, we customized a WLS-type shaftless screw conveyor for the power plant. The core components are made of high-strength, wear-resistant alloy steel and feature a fully enclosed design, stably transporting the sludge from the filter press to the storage silo at a conveying capacity of 30 m³/h. After the equipment was put into operation, the clogging problem was completely solved, the on-site environment was significantly improved, and energy consumption and maintenance costs were greatly reduced.
The performance differences between shaftless and shafted screw conveyors are significant. Shaftless Screw Conveyors for Sludge in Thermal Power Plants: With their shaftless design, shaftless convectionors completely eliminate the problem of viscous sludge entanglement and blockage. Shafted models, due to the presence of a drive shaft, are prone to sludge adhesion, requiring frequent shutdowns for cleaning.
Anti-clogging and anti-entanglement capabilities: Shaftless models use integrated blades, eliminating the problem of viscous sludge entanglement and blockage at the source. Shafted models, due to the presence of a drive shaft, are prone to sludge entanglement on the shaft, requiring frequent shutdowns for cleaning, and are unsuitable for conveying high-viscosity sludge.
Stable conveying: Shaftless models have a smaller gap between the blades and the trough, resulting in more concentrated pushing force and no material retention during conveying. Shafted models, with their drive shaft occupying trough space, limit material conveying space, and the shaft is prone to wear, leading to a decline in conveying efficiency over long-term operation.
Maintenance and Cost: Shaftless conveyors have a simple structure and no easily worn parts such as drive shafts. Maintenance costs are low, requiring only periodic checks of blade wear and cleaning of residual sludge in the tank. Shafted conveyors require regular maintenance of drive shafts, bearings, and other components; the workload of cleaning sludge buildup is significant, leading to higher maintenance frequency and costs.
Working Condition Adaptability: Shaftless conveyors can be fitted with wear-resistant and corrosion-resistant liners to resist the acid and alkali components in thermal power plant sludge, making them suitable for harsh working conditions. Shafted conveyors are more susceptible to sludge corrosion in their shafts and bearings, resulting in a shorter service life; they are more suitable for conveying dry, loose materials.
The material for a Shaftless Screw Conveyor for Sludge in Thermal Power Plants should prioritize wear and corrosion resistance to adapt to the acid and alkali corrosiveness and viscous agglomeration characteristics of desulfurization sludge. The core component, the shaftless helical blade, is preferably made of wear-resistant alloy steel with a hardened surface treatment, offering strong resistance to sludge erosion and extending its service life by more than three times. For highly corrosive sludge, it can be upgraded to 316L stainless steel for even better corrosion resistance. The U-shaped trough is recommended to be made of 304 stainless steel, paired with removable wear-resistant liners to prevent sludge adhesion and wear on the trough.
Dahan Machinery's Shaftless Screw Conveyor for Sludge in Thermal Power Plants starts at $650. Direct from the manufacturer, eliminating middlemen, the price is transparent and offers excellent value. The price is mainly affected by the material, specifications, and customization requirements. The basic carbon steel model is suitable for conventional sludge conveying. The 304/316L stainless steel and wear-resistant alloy steel models, due to their resistance to acid and alkali corrosion and erosion, will have their prices adjusted accordingly based on the material grade. The conveying length, pipe diameter, motor power, and explosion-proof frequency converter configuration will also affect the final price; customized models with long distances and high flow rates will have slightly higher prices. We can customize models based on the on-site conditions and sludge treatment needs of thermal power plants, recommending suitable models and providing detailed quotations.
The Shaftless Screw Conveyor for Sludge in Thermal Power Plants is mainly used to stably and reliably transport treated sludge from below the dewatering machine to the sludge hopper, truck, or subsequent treatment unit, making it a key piece of equipment for ensuring sludge transport.
NOTE: You can also send a message to us by this email sale@xxdahan.com, we will reply to you within 24 hours. Now tell us your needs, there will be more favorable prices!
