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What is the function of a scraper?
Release time:
2021-06-03
Larger sedimentation tanks in urban wastewater treatment plants use scrapers to remove sludge settled at the bottom of the tank and skim off floating scum. What type of sludge scraper should be chosen for water treatment? A sludge scraper is a machine used to remove sludge from rivers. It is used in large-diameter circular sedimentation tanks in urban wastewater treatment plants, waterworks, and industrial wastewater treatment to remove sludge settled at the bottom of the tank and skim off floating scum.
Larger sedimentation tanks in urban wastewater treatment plants use scrapers to remove sludge settled at the bottom of the tank and skim off floating scum. What type ofsludge scraper？
A sludge scraper is a machine that removes sludge from rivers. It is used in large-diameter circular sedimentation tanks in urban wastewater treatment plants, waterworks, and industrial wastewater treatment to remove sludge settled at the bottom of the tank and skim off floating scum. Sludge scrapers mainly include peripheral drive sludge scrapers, central drive sludge scrapers, central drive concentrationsludge scraper，central drive suspended sludge scrapers, gantry sludge scrapers and scum skimmers, walking rake sludge scrapers, chainsludge scraper，spiral conveying sludge scrapers, vertical frame central drive sludge scrapers and flat walking sludge scrapers.
A central drive concentrating sludge scraper mainly consists of an overflow device, beams and rails, an inlet pipe, a transmission device, an electrical box, a flow control cylinder, a main shaft, a scum rake plate, a sludge scraping device, an underwater bearing, small scrapers, a sludge hopper, and a scum rake plate, etc. A central drive concentrating sludge scraper can further separate free water from the sludge in the concentration tank, thereby reducing the sludge volume, increasing the sludge concentration, and discharging the concentrated sludge out of the tank.
The primary sedimentation tank wastewater contains a large number of solid particles and a large amount of sand,sludge scraperThe design retention time cannot be too long, and it needs to run quickly. In contrast, the secondary sedimentation tank wastewater contains more small sludge particles, and the sludge is mainly activated sludge. If the sludge scraper's retention time is too short, the sludge is difficult to settle, so the operating speed of the sludge scraper should be designed to be slower. The primary sedimentation tank mainly needs to scrape the sludge to the sludge hopper, while the secondary sedimentation tank needs to remove the activated sludge deposited at the bottom of the secondary sedimentation tank, so the sludge scraper in the secondary sedimentation tank is accurately a sludge suction machine. The sludge suction machine in the secondary sedimentation tank is generally equipped with a sludge scraper to assist in sludge suction, so it is also calledsludge scraper。
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