High-Performance Mechanical Bar Screen For Sewage And Industrial Wastewater Pretreatment
Product Overview

The mechanical bar screen is a key piece of equipment used in the pretreatment stage of wastewater treatment systems. It is designed to remove large suspended solids, floating debris, and solid waste from wastewater, preventing blockage or damage to downstream equipment such as pumps and aerators.

With its simple structure, stable operation, high level of automation, and easy maintenance, this machine enables efficient and continuous solid-liquid separation and supports unattended operation of wastewater facilities.
Working Principle
The mechanical bar screen consists of a bar rack installed in the channel and a rotating chain rake system.
As wastewater flows through the screen, large suspended solids are intercepted by the bars. Driven by the chain mechanism, the rake teeth continuously lift the retained debris to the top of the screen, where it is automatically discharged into a conveyor or waste container through a self-cleaning or reverse scraping mechanism. This ensures uninterrupted removal of solid waste.
Main Components

• Frame: Made of stainless steel or carbon steel with anti-corrosion treatment for structural strength.
• Bar Rack: The spacing between bars can be customized (typically 1–50 mm) based on treatment requirements.
• Rotary Chain System: Made of corrosion-resistant materials to ensure long-term operation.
• Rake Teeth: Precisely matched with the bar rack for efficient debris removal.
• Drive Unit: Composed of a motor and reducer, equipped with overload protection.
• Rake Cleaning Mechanism: Automatically removes retained solids for continuous operation.

Features

• Fully automatic and continuous operation; suitable for unattended systems.
• Adjustable bar spacing to meet various wastewater treatment conditions.
• Smooth transmission, low noise, and low energy consumption.
• Compact design with a small footprint and easy installation and maintenance.
• Optional control system for remote monitoring and automatic backwashing.

Applications

• Municipal wastewater treatment plants
• Industrial wastewater treatment systems
• Sewage and stormwater pumping stations
• Water intake of hydropower plants
• Pretreatment in industries such as paper making, food processing, pharmaceuticals, textiles, and slaughterhouses

• Automatic control cabinet (with water level difference or manual/auto control modes)
• Debris conveyor
• Compactor for dewatering and volume reduction
• Protective covers and safety railings
• Customized designs for explosion-proof or heavy corrosion environments

     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.