The DG Series Monorail Submerged Scraper is engineered for efficient sludge removal in rectangular clarifiers, tube settlers, and DAF tanks within large water and wastewater treatment plants. This system features a simple structure, reliable transmission, comprehensive electrical protection, and easy installation, making it ideal for automated operations.

Utilizing a continuous chain reciprocating drive mechanism, the system tows a scraper trolley back and forth to effectively move bottom sludge from the outlet zone to the inlet collection hopper. This ensures high-concentration sludge discharge and superior overall removal efficiency.

• Modular & Flexible Design: Simple structure consisting of drive unit, scraper carriage, rails, and controls. Highly customizable deployment options including single or multiple carriages across single or dual tanks to fit specific process requirements.
• Robust Construction: Rolling carriage ensures stable operation even under heavy or unbalanced loads (200kg base capacity). Powerful chain drive pulls scrapers up to 9m wide and 400-500mm high, maximizing sludge removal efficiency.
• High Reliability & Easy Maintenance: Engineered for ultra-low failure rates. Carriages can be easily hoisted out for servicing. Equipped with overload alarms and status indicators for extended lifespan and reduced maintenance costs.
• High-Concentration Discharge: Collects high-concentration sludge directly into the hopper, allowing immediate routing to dewatering equipment. This eliminates the need for secondary thickening, saving process costs and facility footprint.

The Monorail Submerged Sludge Scraper system comprises four main components: Drive Unit, Scraper Carriage Assembly, Rail System, and Electrical Control Unit.

Features a motor, double-stage cycloidal reducer, and overload-shear sprocket assembly that drives the continuous chain. Reciprocating motion is achieved by motor reversal, with all components fully enclosed. Chain transmission provides excellent flexibility, high traction, and precise ratios without excessive tension requirements.

Includes frame, wheels, scraper blades, and flipping device. Connection lugs link the carriage to the chain, forming a closed loop. Towed by the drive unit, the carriage travels along rails for forward (scraping), backward (reset), and flipping actions. In long clarifiers, bumper-rod linkages synchronize multiple carriages.

Consists of head, tail, and intermediate rails (for extended tanks) installed along the tank's centerline. Provides a flat, reliable track with chain-reversing devices equipped at both ends.

Supports Local and Remote operation modes, controlling scraping and return cycles with accurate reversing upon signal reception. Each cycle completes with adjustable standby delay (1-999 minutes). Signal bumpers at both ends trigger the linkage system, activating limit and proximity switches to convert mechanical limits into electrical reversing signals for highly reliable operation.