Chain plate rotary screen machine for sewage removal

• Product Overview

The chain plate rotary screen is a continuous automated cleaning system developed by our company for municipal and industrial wastewater treatment. Featuring a rotating mechanism with interconnected chain plates, it effectively removes solid suspended particles and floating debris from water flows. Designed as a primary or secondary screen, this equipment is installed at pump stations, wastewater treatment plants, and water intake points of various channels. Its installation helps protect downstream pumps, pipelines, and treatment structures while reducing the risk of clogging and wear.

• Structure and Working Principle

1. Core structural composition

The main body of the device features a robust frame structure, with its primary components including:

• The driving device, which includes a motor and a reducer, provides smooth power for the whole chain plate rotary system.
• Chain plate rotary system: Composed of two parallel ring-shaped chains and a series of cleaning plates (or scrapers) connected between them, forming a closed rotary body similar to a tracked structure.
• The bar group is fixed on the frame and moves in relative motion with the rotating chain plate to intercept solid impurities in the water flow.
• The discharge and waste guide device, located at the top of the equipment, removes debris from the chain plate during its rotation by scraping or turning mechanisms, then directs the debris to the conveyor or slag collection container.
• Tensioning and alignment system: Maintains proper chain tension and stable track.
• Control system: Typically equipped with an electrical control cabinet, supporting various automated operation modes including scheduled operation and liquid level differential control.

2. Working Principle

The equipment automatically starts according to preset programs, and its working cycle can be summarized as:

1. Interception: When water flows through the device, solid debris larger than the grid gap is intercepted by the fixed grid bars.
2. Clearing and lifting: The rotating chain plate system descends from the rear of the grate bars to the bottom. During its upward rotation, the chain plate picks up or lifts debris trapped on the grate bars, moving upward with the chain plate.
3. Unloading: The chain plate carrying debris moves to the top discharge zone of the equipment. The debris detaches from the chain plate under gravity or the action of auxiliary scrapers, then falls into the subsequent conveying or collection devices.
4. Rotation: After unloading, the chain plate rotates downward to initiate the next cycle, ensuring continuous cleaning.

• Core technical features

1. Continuous stable operation: The chain plate rotary design ensures smooth operation and adapts well to continuous cleaning tasks.
2. Strength and durability: Chain plates and drive components are generally designed to be mechanically strong enough to handle large or hard solid debris (e.g. wood, packaging).
3. The structure of the device is less obstructive to the water flow channel, which is helpful to keep the low head loss of the device under the large flow.
4. Maintenance convenience: The main transmission components are located on the water or in easily accessible positions, facilitating routine inspection, lubrication, and maintenance operations.
5. Intelligent control: The system can select between time-based or differential level control based on real-time operational conditions, aiming to optimize the balance between cleaning efficiency and energy consumption.

• Main technical parameters

• Typical Application Fields

This equipment is designed for scenarios requiring automated interception and removal of solid impurities in water flow.

• Municipal drainage system: intake grates of urban sewage treatment plants, rainwater pumping stations, and combined sewer pumping stations.
• Industrial wastewater treatment: pretreatment units for wastewater from industries such as papermaking, textiles, food processing, and slaughtering.
• Water conservancy and hydropower engineering: floating object interception of intake and diversion channel.
• Other areas: river water pretreatment, garbage interception at landscape water body replenishment outlets, etc.