Product Overview & Core Functionality

The Linzhen Rotary Rake Mechanical Bar Screen (also known as the Mechanical Grille) is an essential, high-efficiency front-end pretreatment solution developed by Qingdao Linzhen Environment Project Co., Ltd. engineered specifically for municipal sewage plants and diverse industrial wastewater treatment applications. Installed diagonally directly inside open influent channels, this automatic filtration system acts as a robust primary barrier. It is systematically designed to intercept and eliminate large floating debris, coarse rags, fibrous matter, plastic fragments, twigs, and other suspended solids from raw water inflows before they can penetrate deeper into the system. By performing this crucial solid-liquid separation at the inlet stage, the equipment effectively eliminates the risk of downstream pump blockages, pipeline clogging, and premature wear on delicate biological units such as Membrane Bioreactors (MBR) and Moving Bed Biofilm Reactors (MBBR).

Advanced Working Principle

The automatic cleaning cycle of the Linzhen mechanical grille relies on an optimized, motorized mechanical drive system. Power is generated by a heavy-duty motor deceleration device that smoothly drives a continuous loop of rotating traction chains. Affixed to these heavy-duty chains are specialized rake teeth profiles. As the wastewater moves through the stationary vertical grid bars, solid pollutants are blocked on the screen's front surface. Simultaneously, the motorized rake teeth seamlessly align and insert themselves directly into the precise gaps between the grid bars. Moving in a continuous upward cleaning path, the rake teeth rake the accumulated debris out of the fluid stream and carry it smoothly up to the designated discharge point at the top of the main framework. Upon reaching the top pinnacle, a mechanical scraper mechanism ejects the captured trash out into a waste collection bin or conveyor system for streamlined disposal, maintaining an uninhibited, continuous hydraulic flow through the channel.

Key Engineering Features & Benefits

• Continuous Automation & Low Labor Overhead: Equipped with full automation capabilities, our bar screen runs 24/7 with minimal operator intervention required. This drastically minimizes manual labor costs while protecting operators from hazardous open-channel debris handling.

• Industrial-Grade Stainless Steel Construction: Built inside our state-of-the-art production facility, the main framework, chain linkages, and rake teeth components are precision-machined from premium structural stainless steel (standard SS304 or optional highly corrosion-resistant SS316L). This guarantees extreme wear resistance and longevity in highly corrosive or toxic industrial wastewater streams.

• Dual Coarse & Fine Screening Versatility: The mechanical grille supports flexible adjustment of bar gaps during manufacturing. It can be custom-tailored as a coarse screen (larger gaps for heavy debris) or a fine screen (narrower gaps to protect advanced membrane modules), maximizing overall pollutant trapping efficiency.

• High Hydraulic Efficiency & Low Head Loss: The optimized hydrodynamic shape of the grid bars maximizes the effective fluid area, significantly reducing water head loss at the pumping station intake and improving the overall energetic efficiency of the plant.

• Advanced Corrosion Protection: To combat long-term chemical wear, all non-stainless components are treated using elite industrial coatings (such as SigmaCoatings and PainBow) executed strictly under a multi-layered, standardized paint baking process.

Technical Specifications & Custom Engineering

As a highly focused, professional water treatment equipment manufacturer, Linzhen offers fully customizable non-standard configurations engineered according to specific site dimensions, seasonal flow variations, and water quality parameters.

• Standard Productivity Base: Up to 2,000 Liters per Hour (custom scale-up models available for larger municipal installations).

• Operational Power Rating: Scalable options including 800W, 1kW, and 2kW configurations based on deep channel constraints.

• Voltage Compatibility: Fully adaptable across 110V, 220V, and 380V (50Hz/60Hz) to match global grid requirements.

• Structural Engineering Weight: Standard modular weight starts at approximately 500 kg.

• Quality & Verification Standards: Manufactured under rigorous ISO 9001 and CE compliance. Complete machinery test reports and official factory video outgoing-inspections are supplied standard for every single order.

Diverse Application Scenarios

The Linzhen Rotary Rake Mechanical Bar Screen is deployed globally across key water treatment sectors:

• Municipal Infrastructure: Urban sewage treatment plants, rainwater drainage pumping stations, and municipal water purification facilities.

• Industrial Pretreatment Workshop: Essential entry filtration for high-load industrial wastewater lines in pulp & paper mills, textile printing & dyeing factories, chemical manufacturing plants, and pharmaceutical operations.

• Food & Agriculture Wastewater: Large solid screening for slaughterhouses, food processing and beverage industries, and commercial aquaculture wastewater filtration.

• Surface Water Intake Protection: Primary screening at reservoir intakes, river water diversions, and industrial cooling water loop systems.

Flexible Integration & Downstream Compatibility

To deliver complete turnkey environmental solutions, our engineering team designs this bar screen to achieve full automated synergy with downstream wastewater components:

1. Pretreatment Sequence: Pairs optimally with down-channel fine drum screens, vortex grit chambers, grit-water separators, and automated PAC/PAM chemical dosing stations to balance chemical oxygen demand (COD) and total suspended solids (TSS).

2. Main Treatment Core: Provides flawless front-end protection for Integrated Packaged Sewage Treatment Plants utilizing Dissolved Air Flotation (DAF) systems, Lamella Clarifiers, MBR tanks, and advanced biological contact oxidation systems.

3. Sludge Dewatering Loop: Smoothly facilitates primary separation, allowing downstream surplus sludge to be cleanly processed by Multi-Plate Screw Presses (such as our hot-selling #302 Screw Stack Press), Plate & Frame Filter Presses, or Belt Filter Presses.

Why Partner with Linzhen Environment?

Established in 1988 in the Huangdao District of Qingdao, China, Qingdao Linzhen Environment Project Co., Ltd. has grown into a world-class manufacturing base for water treatment machinery, boasting an expansive 36,000 square meter facility equipped with over 80 advanced CNC cutting, laser/plasma welding, and precision bending tools. Our multi-disciplinary team consists of over 130 specialized machinery systems handled by a dedicated workforce of 360 employees, including an elite R&D core of 72 engineers and senior technical personnel.

With nearly four decades of professional manufacturing experience, Linzhen products have been successfully exported to over 50 countries worldwide, spanning North America, South America, Europe, Asia, and Africa. To provide rapid, hassle-free international support, we maintain active overseas branches, showrooms, and local spare-parts warehouses across strategically localized hubs including Malaysia, Australia, and the Philippines. Choosing Linzhen means securing direct-from-factory pricing, cutting-edge 3D layout designs, rigorous quality documentation, and lifelong technical video support from an industry leader.

FAQ

How to buy your idea products?
A: You can provide us your water sources, water quality, flow rate and ground area (connect us for more details).

How to pay?
A: TT and L/C are acceptable and TT will be more appreciated. 30% deposit before producing, 70% balance before loading by TT.

What is the delivery time?
A: It depends on order quantities. Generally speaking, the delivery time will be within 4 to 6 weeks.

How to pack the products?
A: We use standard package. If you have special package requirements, we will pack as required, but the fees will be paid by customers.

How to keep your equipments from corrosion?
A: We use the world-famous paint, like SigmaCoatings, PainBow, etc. What’s more, we paint strictly according to the standard process.

How do you manufacture your equipment?
A: Our machining technology includes laser/plasma cutting, automatic welding, CNC cutting and bending.

How to install after the equipments arriving destination?
A: We will provide detailed illustrations to you. If it is necessary, we will send technicians to help you. However, the visa fee, air tickets, accommodation, wages will be paid by buyers.