The Unite cross-flow filtration system utilizes metal membrane filterelements as the filtration unit. The system provides inside-out filtration,offering continuous filtration cycles through cross-flow filtration. Thematerial flows through the filter element, which is open at both ends.The filtrate passes through the porous filter element and exits thesystem, while solid particles are retained in the circulating flow. Thismethod is suitable for filtering materials with specific particlecharacteristics or for applications requiring continuous reactionprocesses, maximizing the retention of valuable solid particles, such asprecious metal catalysts.
1. Exceptional Anti-fouling and Anti-clogging Capabilities (Core Advantage)
Dynamic Self-Cleaning Mechanism: The high-velocity flow of the feed liquid generates intense shear forces across the membrane surface, continuously sweeping away intercepted solid particles, macromolecules, or colloids, thereby preventing their accumulation and the formation of a thick "filter cake" layer on the membrane surface.
2. Excellent High-Solids Handling Capacity
Processing "Viscous" Materials: This system excels particularly at processing feed liquids characterized by high concentrations, high viscosities, or colloidal properties. Even under conditions of extremely high solids content, it maintains efficient separation—a scenario where conventional filters would rapidly and completely clog.
3. Enables Truly Continuous Operation
No Need for Frequent Downtime: Thanks to its self-cleaning characteristics, the system does not require frequent filter element replacements—unlike bag or cartridge filters—nor does it necessitate frequent interruptions to the filtration process, as is common with traditional backwashing systems.
4. Extended Service Life for Membrane Modules/Filtration Media
Low-Wear Operation: Despite the high flow rates, the membrane experiences more uniform stress distribution because the system prevents particles from becoming deeply embedded within the membrane pores or being subjected to intense compaction on the surface.
Cross-flow filtration separates particles in a solution by passing the solution along the surface of a membrane. The liquid passes through the membrane because of a pressure differential across the membrane.
1.Unique Filtration Structure
Unique inside - out filtration structure for efficient separation.
3.High - Flux Maintenance
High shear force keeps filter cake layer thin, maintaining high flux during prolonged filtration.
5.Minimal Residual Liquid
Minimizes residual liquid volume within the equipment.
2.Tangential Fluid Flow
Fluid flows tangentially to membrane surface to retain solid particles in main fluid.
4.Convenient Solid Collection
Solid materials collectable at top or bottom of filter, facilitating filter cake formation.
6.Filter Cake Washing Support
The filter supports the washing of filter cake.
Leak Check: Ensure all connections, gaskets, and clamps are tight.
Degassing (Priming): Fill the system with liquid and open the vent valves to remove all air bubbles.
Why? Air pockets can cause "water hammer" shocks that shatter ceramic membranes or tear organic ones.
Slow Pump Start: Gradually increase the pump speed using the VFD (Inverter). Never start at 100% speed.
Flow Before Pressure: Establish a high Cross-Flow Velocity (tangential flow) first, then slowly throttle the back-pressure valve to reach the target filtration pressure.
Monitor TMP: Keep the Transmembrane Pressure (TMP) within the specified range. Higher pressure does not always mean faster filtration; it may lead to severe fouling (plugging).
Maintain Velocity: Ensure high-speed liquid flow across the membrane surface. High velocity prevents the "Filter Cake" from building up.
Watch the Flux: If the output flow (permeate) drops significantly or turns cloudy, stop to check for fouling or membrane damage.
Slow Ramp-down: Gradually decrease pressure and pump speed before turning off the system.
Immediate Flush (CIP): Never let the process liquid sit in the system after shutdown. Flush with water or cleaning solution immediately to prevent the solids from drying and "baking" onto the membrane.
Wet Storage: Membranes must stay wet at all times. If the system will be idle for >48 hours, fill it with a preservative solution (e.g., 0.5% Sodium Bisulfite).
Automated seawater pre-filtration for GNPower Mariveles (Philippines), providing robust protection against tropical marine fouling and sediment for high-capacity power generation.
Supporting Phase II of Dongfang Electric’s clean energy project, thisheat-resistant system ensures ultra-low dust emissions to protect criticaldownstream heat recovery equipment.
Addressing high-pressure natural gas purification, this integrated systemcombines particulate filtration with coalescing separation to ensure the safeoperation of long-distance pipelines in extreme climates.
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