Vertical Shaft Center-Drive Sludge Scraper
Product Overview

The Vertical Shaft Central Drive Sludge Scraper is designed for large circular clarifiers and thickeners, providing efficient sludge collection and discharge.
A vertical rack structure supports the central drive unit, which transmits torque through a vertical shaft to the scraper arms.
It ensures smooth operation, uniform torque distribution, and reliable performance under heavy loads and large diameters.

Working Principle

Wastewater flows into the clarifier via the central feed well, where solids settle by gravity.
The central drive rotates scraper arms through a vertical shaft, collecting sludge toward the center hopper using blades and guide plates.
Sludge is discharged by gravity or suction.
The system includes automatic torque monitoring for overload protection and may include a surface scum skimmer.

Main Components

• Vertical Rack & Drive Unit: Support structure and torque transmission.

• Vertical Shaft: Transfers power from gearbox to scraper arms.

• Scraper Arm & Blade: Directs sludge toward the central hopper.

• Feed Well & Baffle: Ensures uniform flow distribution.

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

• Scum Removal System (optional): For surface scum cleaning.

• Control System: PLC automation with overload protection and alarms.

Features

• Uniform torque and smooth transmission with vertical rack design;

• Ideal for large-diameter and deep circular tanks;

• High structural rigidity and corrosion resistance;

• Automatic torque protection ensures operational safety;

• Optional scum removal system for dual sludge-scum cleaning;

• Fully automated operation with minimal maintenance.

Applications

• Primary and secondary clarifiers in municipal WWTPs;

• Industrial wastewater sedimentation and thickening tanks;

• Water treatment plant clarifiers and storage basins;

• Large-scale sludge concentration and reuse systems.

Optional Configurations

• Scum skimmer system – optional for surface cleaning;

• Torque monitoring & overload protection – mechanical or electrical;

• VFD control – for automatic speed regulation;

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

• Bridge structure options – fixed, walking, or rotary;

• Discharge systems – gravity, suction, or siphon;

• Remote monitoring – IoT-based data collection and status feedback.

     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.