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Henan Jincheng Industrial Technology Co., Ltd
The structural principle of electric scraper filter
Date: 2025-05-09Read: 0
1、 Core structure composition
1. Filter unit
Adopting 316L stainless steel filter or multi-layer sintered filter element, the filtration accuracy covers 5-500 μ m, and can be customized according to working conditions;
Some models are designed with metal wedge-shaped filters to increase filtration area and enhance anti clogging performance, suitable for high viscosity fluids such as coatings and polymers.
2. Scraper system
Driven by servo motors or reduction motors, the scraper maintains a precise distance of 0.1-0.3mm from the filter screen, and can be made of materials such as nylon, polytetrafluoroethylene, or flexible alloys;
Some models use hyperbolic flexible scrapers to gradually reduce the wear rate of the filter screen and adapt to crystalline or fibrous impurities.
3. Drive and control module
Integrated PLC control system, monitoring pressure changes on both sides of the filter screen through differential pressure sensors, with a trigger threshold set at 0.1-0.5 MPa;
Support scheduled cleaning, pressure differential triggering, and remote IoT control to achieve unmanned operation.
4. Sewage system
The bottom is designed with an impurity collection chamber, equipped with an automatic drain valve, and the scraped impurities are discharged through fluid pressure or gravity;
Some models are equipped with anti suction devices to improve the discharge efficiency of high viscosity media.
2、 Working principle and process
1. Filtering stage
The fluid passes through the filter from top to bottom, and the cleaning medium flows out from the outlet. Impurities are trapped on the inner surface of the filter, forming a filter cake layer.
2. Scraping trigger
When the pressure difference caused by the filter cake layer exceeds the preset value (or reaches the set time threshold), the control system activates the scraper action;
Some models use flow sensors to assist in judgment and avoid false triggering.
3. Self cleaning stage
The scraper rotates or reciprocates along the surface of the filter screen, peeling off the filter cake layer and introducing impurities into the collection chamber through centrifugal force or fluid pressure;
The filtration operation continues during the cleaning process, achieving uninterrupted production.
4. Simultaneous discharge of pollutants
After the accumulation of impurities in the collection chamber reaches the set amount, the discharge valve automatically opens to concentrate the discharge of high concentration waste residue.
3、 Key technical characteristics
1. Dynamic gap control
Maintain the micrometer level spacing between the scraper and the filter screen through laser calibration or elastic compensation mechanism, balancing cleaning efficiency and filter material protection.
2. Multi mode adaptation
Support adjusting scraper pressure, speed, and cleaning frequency for different media (such as acidic and alkaline liquids, molten polymers) to cope with viscosity ranges up to 800000 centipoiseextremeWorking conditions.
3. Energy optimization design
Some models convert scraping resistance into electrical energy storage, reducing overall energy consumption by 15% -30%.
This device solves the pain point of traditional filters needing to be shut down for cleaning through mechatronics integration design, and achieves a 30% -50% increase in filtration efficiency in fields such as chemical engineering and water treatment.
