HGC rotary screen machine for sewage removal

• Product Overview

The rotary screen scrubber is an automated pretreatment system widely used in municipal drainage networks, wastewater treatment plants, industrial effluent treatment, and intake channels of pumping stations. Featuring continuously rotating mechanical tooth rakes, this equipment effectively intercepts and removes solid suspended particles and floating debris from water flows, significantly reducing risks of clogging in downstream processes and equipment wear. With its continuous operation and high automation level, it stands as a preferred solution for solid-liquid separation in water treatment systems.

• Structure and Working Principle

1. Core structural composition

The equipment structure design focuses on functionality and reliability, primarily including:

• Rack and grates: The main support structure, with grates forming the filtration surface. The grating spacing can be selected within a common range of several millimeters to tens of millimeters according to actual needs.
• Rotating tooth rake system: The core working component, consisting of multiple tooth rakes connected in series by a ring chain, which rotates along the grate surface under the drive mechanism.
• The driving device, which includes motor, reducer and transmission mechanism, provides power for the equipment.
• Discharge mechanism: When the toothed rake returns to the top with debris, it is separated from the rake by a scraper or deflection mechanism, then falls into the conveyor or slag collection container.
• Control system: Typically equipped with an electrical control cabinet, it supports scheduled operation and differential level control, designed to adjust the operating frequency according to the working conditions.

2. Working Principle

The device runs automatically according to the preset program:

1. Interception: When the untreated water flows through the inclined installed screen, solid debris larger than the screen gap is intercepted by the screen bars.
2. Clearing: The rotating rake moves downward from the rear of the grate to the bottom, and during its upward rotation, the rake teeth pick up debris trapped on the grate.
3. Discharge: The toothed rake carrying debris moves to the top of the equipment, where the debris is separated by gravity or auxiliary scrapers and falls into the subsequent collection device.
4. Circulation: After unloading, the toothed rake continues to rotate, enabling continuous operation.

• Core technical features

1. Continuous automated operation: The equipment can be configured for continuous or intermittent operation, designed to minimize manual intervention and accommodate varying cleaning requirements under different operating conditions.
2. Adaptability: Capable of clearing and removing various common solid floating objects and suspended particles.
3. Structural design: Critical components are typically made of carbon steel with anti-corrosion treatment or stainless steel to withstand humid environments.
4. Control flexibility: Features dual control of time and liquid level difference, automatically adjusting operation frequency based on debris levels in the channel to balance cleaning efficiency and energy consumption.

• Main technical parameters

• Typical Application Fields
• Municipal sewage treatment: the intake screen room of the urban sewage treatment plant.
• Industrial wastewater treatment: pretreatment of wastewater from papermaking, textile, food and other industries.
• Water supply and drainage pumping station: The intake of rainwater and sewage pumping stations.