After the sewage from the slag scraper enters the air flotation tank, it first passes through the reaction area when in use, and the small suspended particles are aggregated into large particles by dosing, and then enters the contact area with dissolved air water, and the fine air bubbles in the dissolved air water adhere to it. With the surface of suspended particles, flocs with a specific gravity smaller than water are formed, and when they enter the separation zone, they float to the surface of the water and form waste residue. The slag scraper is located above the isolation area. Through reciprocating motion, the waste slag is regularly scraped into the slag discharge tank and discharged to achieve sewage purification.
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