Mastering Solid-Liquid Separation: The Anti-Clogging Mechanics of Outside-In Microfilters

2026/05/18

에 대한 최신 회사 뉴스 Mastering Solid-Liquid Separation: The Anti-Clogging Mechanics of Outside-In Microfilters
Introduction: The Challenge of Fine Screening

When filtering highly concentrated industrial wastewater, traditional screens face a chronic issue: rapid mesh blinding and clogging. This leads to overflow, constant manual cleaning, and high moisture content in the discharged waste. The WLW Type Outside-In Rotary Drum Microfilter eliminates these operational bottlenecks through intelligent hydraulic design and specialized materials.

Basic Principle: How the "Outside-In" Mechanism Works

Understanding the flow path is key to recognizing its efficiency. Wastewater enters the system, passes through a buffer distribution box, and rises to the filtration water level on the outside of the drum. Clean water passes through the mesh gaps into the interior of the drum and then discharges outward through the bottom. Crucially, this bottom-outward flow simultaneously backwashes the lower section of the mesh. Meanwhile, debris larger than the mesh gap is blocked on the exterior surface, carried over by the drum's rotation, and scraped off into a slag hopper by an unloading mechanism.

The Core Value: Ultimate Anti-Clogging and Waste Volume Reduction

For facility operators focused on reducing maintenance and disposal costs, the WLW series delivers two extraordinary technical advantages:

  • Inverted Trapezoidal Mesh Design: The screen bars feature an inverted trapezoidal (wedge wire) cross-section. This unique geometry ensures that particles either pass through entirely or stay on the surface, making it nearly impossible for debris to get wedged and clog the filter pores.

  • Dual Self-Cleaning System: Beyond the natural backwashing of the exiting water, the equipment features a specialized flushing device that brushes away sticky impurities, combined with a secondary internal flushing system to guarantee optimal mesh regeneration.

  • Drier Waste Discharge: Because the debris is captured on the outside and effectively drained during the drum's rotation, the moisture content of the discharged garbage is 30% to 50% lower than that of traditional "inside-out" screening equipment. This drastically reduces the weight and volume of the waste, cutting down hauling and disposal fees.

  • Smart Variable Speed: Controlled by an AC variable speed motor, the drum's rotation (ranging from 4 to 20 r/min) can be dynamically adjusted based on the influent flow rate, ensuring the equipment always maintains its optimal working state while minimizing energy consumption.