Center-Drive Sludge Scraper

Product Overview

The Central Drive Sludge Scraper is designed for circular sedimentation and thickening tanks to collect and discharge settled sludge from the tank bottom.
Driven by a central gearbox, the scraper arms rotate slowly, pushing sludge toward the central hopper for discharge, while optional skimmers remove surface scum.
It features simple structure, reliable operation, and easy maintenance, making it ideal for municipal and industrial wastewater treatment plants.

Working Principle
Wastewater enters through the central feed pipe and distributes evenly within the circular tank.
Under gravity, solids settle at the bottom. The central drive mechanism rotates scraper arms slowly, directing sludge toward the center hopper for discharge by gravity or suction.
Surface scum is collected by the scum skimmer and discharged via the scum trough.
The system supports automatic operation and overload protection.

Main Components

• Central Drive Unit: Gear reducer and shaft assembly driving scraper rotation.

• Scraper Arm & Blades: Radially arranged arms directing sludge to center.

• Central Bearing Support: Ensures smooth rotation and torque stability.

• Sludge Hopper & Discharge Pipe: Collects and removes sludge.

• Scum Skimmer (Optional): Removes floating scum from surface.

• Bridge or Platform: Supports drive unit and provides access.

• Control System: PLC control with overload protection.

Features

• Simple structure and reliable operation;

• Torque overload protection for safety;

• Suitable for large and medium circular tanks;

• Lightweight, corrosion-resistant scraper arms;

• Optional scum removal for combined operation;

• Fully automatic and remote monitoring available.

Applications

• Secondary and primary clarifiers in municipal WWTPs;

• Industrial wastewater settling or thickening tanks;

• Water treatment plant sedimentation systems;

• Sludge concentration and reuse processes.

Optional Configurations

• Scum removal system – with skimmer arm and trough;

• Torque protection – mechanical/electrical overload safeguard;

• VFD control – automatic speed adjustment;

• Bridge options – travelling, fixed, or step type;

• Discharge types – gravity or suction;

• Corrosion protection – epoxy coating, galvanizing, or stainless steel;

• Smart monitoring – remote data and performance tracking.

     Jiangsu Sanhe Environmental Protection Group Co., Ltd., formerly Jiangsu Sanhe Environmental Protection Equipment Co., Ltd., is located on the scenic shores of Lake Taihu. It is a renowned manufacturer and developer of modern environmental protection and water treatment equipment in China. It comprises several subsidiaries, including Jiangsu Sanhe Environmental Engineering Co., Ltd. and Yixing Sanhe Environmental Protection Design Institute Co., Ltd. The parent company has a registered capital of 100.2 million yuan, a building area of ​​over 20,000 square meters, and a staff of 52 technicians. The company boasts not only strong environmental protection equipment production and R&D capabilities, but also a highly qualified team with over 30 years of experience in environmental protection equipment production and service, a passion for environmental protection, and a commitment to integrity.

     After nearly 30 years of continuous effort, our innovative development of new products, technologies, materials, and processes, along with our expertise, has been widely adopted in the industry. We have developed advanced continuous-flow activated carbon filters and differential fully automatic backwash filters specifically for reclaimed water reuse and zero-discharge projects. We have also independently developed high-efficiency activated carbon suitable for flow-through activated carbon towers, resolving challenges in China due to poor adsorption performance, short service life, saturation, and high operating costs, hindering widespread adoption and ensuring long-term effective use of activated carbon.

    ​Since its establishment, Jiangsu Sanhe Environmental Protection Group Co., Ltd. has provided qualified products and services to nearly a thousand renowned domestic and international manufacturers, including municipal sewage treatment plants, the machinery and chemical industry, CNPC, Sinopec, Baosteel Group, Jiangxi Copper Group, Dongfeng Nissan, Dongfeng Motor Corporation, commercial passenger vehicle companies, Hangzhou Luxgen, Great Wall Motors, Dongfeng Peugeot Citroen Automobile, Dongfeng Yangzijiang Bus, CSR Corporation, and the Tarim Oilfield, earning a strong reputation. We are grateful to all our friends who have given us opportunities and helped us grow!

     We firmly believe in down-to-earth and steady development; we advocate scientific innovation and unremitting pursuit; and we promote energy-saving, low-carbon, and green living. We provide our customers with ingenious products and services and strive to establish our company as a leading modern enterprise in China's environmental protection production, research, and development sectors.