CQ Type Clarify Device
Introduction :
CQ Dissolved Air Flotation (DAF) Clarifier is used to treat wastewater that contain free floating or emulsified oil dissolved heavy meyletals soaps surfactants and many other waste streams.The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank. The released air forms tiny bubbles which adhere to the suspended matter causing the suspended matter to float to the surface of the water where it may then be removed by a skimming device.
Principle of works :
The feed water to the DAF float tank is often (but not always) dosed with coagulant (such as ferric chloride or aluminum sulfate) to coagulate the colloidal particles and/or flocculant to conglomerate the particles into bigger clusters.
A portion of the clarified effluent water leaving the DAF tank pumped though a dissolved air pump in which air is introduced and output air-saturated water.The air-saturated water stream is recycled to the front of the float tank and flows through a pressure reduction valve just as it enters the front of the float tank which results in the air being released in the form of tiny bubbles. Bubbles form nucleation sites on the surface of the suspended particles adhering to the particles. As more bubbles form the lift from the bubbles eventually overcomes the force of gravity. This causes the suspended matter to float to the surface where it forms a froth layer which is then removed by a skimmer. The froth-free water exits the float tank as the clarified effluent from the DAF unit.Advantage :
● Equipment processes structure compact less occupied area.
● Lower energy consumption saving 50%
● Lower chemical consumption saving 50%
● High concentration (reach to 4%) of scum
● High SS removal rate (reach to 95%)
● High COD removal rate( reach to 90%)
● The outlet water very clear
● Easy to operate and maintenance
Technical Parameters :
Real Scene shooting :
