Malaysia + Rotary Drum Filter + Paper Mills

August 26, 2025 Malaysia

Product: Rotary Drum Filter

Country: Malaysia

Application: Paper Mills

Rotary drum filter is a crucial solid-liquid separation device in paper mills, primarily used for whitewater recovery, fiber recovery, and wastewater treatment. Its core principle is to use a rotating drum screen to mechanically separate suspended solids (such as fibers, fillers, and rubber) from water through filtration.

Main Applications of Rotary Drum Filter in Paper Mills

1. Whitewater Recovery and Fiber Recovery.

This is the most core and common application of rotary drum filter.

Background: The wire and press sections of a paper machine generate large amounts of whitewater containing valuable fibers, fillers, and chemical additives.

Application: Whitewater below the wire or concentrated whitewater is fed to the rotary drum filter system for treatment.

Fiber and Filler Recovery: The retained fiber and filler slurry can be directly reused in the paper stock preparation system, significantly reducing raw material consumption and production costs.
Purified White Water: The filtered water can be used for processes requiring less stringent water quality, such as screen flushing, spraying, and stock dilution. This significantly reduces water consumption in the papermaking process and enables water recycling.

2. Wastewater Pretreatment.

Before papermaking wastewater enters the biochemical treatment system, it undergoes physical pretreatment using a rotary drum filter system.

Purpose: To remove most degradable suspended solids and floating fibers from the wastewater, significantly reducing the load on subsequent biochemical treatment units, preventing clogging, and improving biochemical treatment efficiency.

3. Slurry Purification and Screening.

In certain process stages, rotary drum filter can be used to concentrate and purify low-concentration slurry and remove small impurities.

Key Points in Selecting and Using a Rotary Drum Filter System

Screen Aperture: Select based on the fiber length to be recovered and the size of the material allowed to pass. Common pore sizes include 50 microns, 75 microns, and 100 microns. Smaller pore sizes provide higher filtration accuracy but also increase clogging.
Backwash System: Efficient backwashing is key to ensuring continuous and stable operation of the rotary drum filter system, requiring flushing water of sufficient pressure and flow rate.
Material Selection: Parts contacting wastewater are typically made of stainless steel or higher-grade, corrosion-resistant materials to withstand the complex chemical environment of papermaking wastewater. Automated Control: Typically equipped with a liquid level controller, the rotary drum filter system automatically controls the drum speed based on the liquid level, ensuring optimal filtration efficiency and throughput.

In paper mills, rotary drum filter is more than just a simple filtration device; it is a resource recycler and a key node in the circular economy. By effectively recovering fiber and clean water from whitewater, it directly creates economic benefits for papermakers while addressing environmental protection and energy conservation issues. It is an indispensable piece of equipment in the modern papermaking industry.

After-Sale Services

Quality guarantee: 12 months after the equipment having been operated.
Satisfied after-sell service: free maintenance and inspection.
Detailed installation instructions, CAD drawing and product qualification certificate.