Product Introduction
The secondary sedimentation tank scraper suction machine is suitable for radial flow circular sedimentation tanks, mainly composed of a working bridge (full bridge/half bridge), a transmission device, a scraper mechanism (logarithmic spiral scraper), a suction system, a central support, a stabilizing cylinder, an overflow weir plate, a floating slag scraper collection device, and an electrical control system. The transmission device drives the working bridge to rotate around the pool, and the scraper plate scrapes the sludge at the bottom of the pool towards the suction port. The sludge is discharged from the pool through siphon or pump suction formed by the water level difference, while the floating slag is skimmed into the slag discharge hopper. Divided into peripheral transmission (full bridge/half bridge) and central transmission (suspension/gantry) according to the transmission mode; According to the discharge method, it can be divided into scraping type and scraping suction type.
Process Selection
1. Selection based on pool type: For circular radial flow secondary sedimentation tanks, center drive or peripheral drive scraping and suction machines are preferred. For tank diameters ≤ 18m, center drive type (compact structure, low energy consumption) is selected. For tank diameters>20m, peripheral drive full bridge type (large transmission torque, wide coverage) is selected; The rectangular laminar flow secondary sedimentation tank adopts a gantry crane type scraper suction machine.
2. Selection based on treatment scale: For small-scale sewage treatment plants (with a daily treatment capacity of less than 50000 tons), central drive or half bridge peripheral drive scraper suction machines are selected; Large and medium-sized sewage treatment plants (with a daily processing capacity of ≥ 50000 tons) use full bridge peripheral transmission or gantry crane scraper suction machines.
3. Selection based on sludge properties: Conventional activated sludge process secondary sedimentation tanks use siphon or static pressure suction machines; Industrial wastewater secondary sedimentation tanks with high sludge concentration (>6g/L) or high sand content should use pump suction scraping and suction machines.
4. Selection based on installation conditions: For underground or semi underground secondary sedimentation tanks, central or peripheral transmission scraping and suction machines are preferred; The above ground rectangular secondary sedimentation tank adopts a gantry crane type scraper suction machine; Modular assembly equipment can be used for the renovation of existing sedimentation tanks, without the need for large-scale civil construction.
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