The scraper pre-filter is a fully automatic online self-cleaning industrial filtration device. It relies on an electric/pneumatically driven mechanical scraper and rotating brush to repeatedly scrape away accumulated impurities from the filter screen. No downtime for disassembly and cleaning is required throughout the process. It is specifically designed for continuous production environments handling high-viscosity, high-solids, high-suspended-solids, easily crystallizing, and easily clogged fluids. It perfectly replaces traditional bag, basket, and backwash filters, solving industry pain points such as frequent screen clogging with viscous materials, time-consuming manual cleaning, frequent production line downtime, and high material loss. It achieves 24-hour uninterrupted closed-loop filtration, resulting in lower maintenance costs, stronger production continuity, and stable and controllable filtration quality.
Technical features:
1) Filtration accuracy: 20-500μm;
2) Good regeneration effect and long service life;
3) Continuous and automated operation;
Structure:
Core components | Composition |
Vessel/ Shell | Standard SS304; upgraded to SS316L for corrosion/acid/alkali conditions; pressure-resistant design, maximum pressure resistance 1.6MPa, corrosion resistant, impact resistant, food processing models feature mirror polishing treatment inside. |
Filter | Wedge mesh (high precision, easy to scrape slag, mainstream choice) / Perforated metal mesh (coarse filtration, high flow rate); strong and tough, not easily deformed, with uniform and stable gaps for precise control. |
Scraper/brush | Food and mildly corrosive media: PTFE scraper (no metal contamination); Chemicals and high-hardness particles: Stainless steel scraper; Elastic spring clamping structure ensures tight contact with the filter screen throughout the entire scraping process with no dead corners. |
Drive system | Motor rotation drive (for ultra-high viscosity and high flow rate applications); Pneumatic cylinder lifting drive (high precision, clean food/pharmaceutical applications), stable operation and low failure rate. |
Drain valve | Pneumatic/electric automatic sewage discharge, which can be combined with manual bypass sewage discharge; Intermittent centralized slag discharge reduces media loss. |
Inlet/ Outlet Connection | Both flange and Nozzle standard interfaces are available, and custom non-standard diameters are also supported. |
Seals | Silicone or fluor rubber (FKM), resistant to chemical corrosion |
Control system | Equipped with a differential pressure sensor and PLC control cabinet, it can be expanded to include remote communication, alarm, and automatic shutdown protection functions. |
Advantages:
1) Compared to bag filters: No filter bag consumables, no need to frequently open the cover for replacement, no material spillage and waste, and high-viscosity materials do not stick to or clog the bag;
2) Compared to basket filters: Fully automatic online cleaning, eliminating the need for manual removal of the filter screen, significantly reducing labor costs and downtime;
3) Compared to backwash filters: it cleans sticky and soft impurities more thoroughly, preventing impurities from being squeezed into the filter screen gaps, resulting in better regeneration.
Overall benefits: Continuous production capacity increases by more than 30%, annual costs of consumables, labor, and downtime losses decrease by about 40%, and it is suitable for upgrading and transforming automated and intelligent production lines.
Application areas:
Food processing: filtration of impurities in fruit juices, syrups, or sauces;
Chemical production: filtration of high-viscosity slurries, resins, or coatings;
Lubricating oil circulation: removes metal shavings and protects the hydraulic system;
