This technology features a water treatment sludge screen and lifting device where a first filtration screen submerged below the maximum water level and a second upward-bent dewatering screen are installed in sequence within the water treatment channel between the inlet and outlet. Scrapers attached to a closed-loop lifting chain scrape the sludge from the screens and discharge it through an exit port.
Conventional water treatment screens were installed at a single angle extending above the water surface, resulting in a small effective filtration area. Furthermore, accumulated sludge often blocked drainage, causing water levels in the channel to rise. Additionally, scrapers were prone to bending or breaking when encountering heavy debris due to the direct impact of the load.
This technology maximizes the filtration area by placing the first filtration screen at a gentle angle below the water surface. The second dewatering screen, set at a steeper angle, allows water dripping during the lifting process to fall behind the first screen, ensuring smooth drainage. The scrapers are hinge-mounted to attachments with adjustable height; they rotate under overload and return to position via elastic springs. Support frame sprockets and chain guides stabilize the lifting chain. Applicable to sewage treatment plant inlets, industrial wastewater facilities, rainwater pumping stations, and agricultural/livestock waste treatment, this system filters more sludge within the same channel width while reducing operational downtime caused by water level rises and scraper failures.
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