What is flocculation?
The separation of a solution, most frequently the removal of debris from a fluid, is referred to as flocculation. The phrase is derived from the word floc, which implies flakes of material; therefore, after a solution has been flocculated, the sediment has aggregated into bigger aggregated flakes, making it simpler to detect and remove. This process can occur spontaneously or be induced by the use of flocculants and/or physical methods.
What is the use of floc tubes in waste water treatment plant?
Flocculation (Floc.) Tubes are hydraulic flocculators that utilise the energy of the wastewater flow to mix chemicals into the wastewater, promoting coagulation and flocculation. Floc tubes are frequently used as a pre-treatment for Dissolved Air Flotation (DAF) systems. The floc tubes are made of PVC or CPVC pipe, with each unit having two different diameters of pipe to optimize performance across a wider range of flows. In straight pipe runs, the bigger of the two pipe diameters is employed to enable gentle mixing and improve the hydraulic retention period. To maximize mixing and backmixing, the twists are built with lower pipe sizes.
Why is back mixing crucial in a flocculation tube?
Many chemical metering systems are pulsed, which means that the chemicals are metered in pulses rather than as a continuous flow. If the water inside the floc tube flows at a given velocity and the pump injects chemicals at a certain number of pulses per minute, there will undoubtedly be sections of the flow that do not get direct chemical dosing. As a result, certain sections would be overdosed while others would be underdosed, increasing drug consumption and lowering treatment efficiency. Backmixing ensures that chemicals are distributed uniformly while also providing the agitation required for successful flocculation.
Operation of Floc Tubes
The twists, constrictions, and expansions of the floc tube provide the majority of the mixing activity. The limitation and expansion of pipe size creates more turbulence and eddies in the flow pattern. When these eddies combine with the changes in flow direction at the elbows, they disturb the velocity gradient and flow patterns, resulting in considerable radial and axial backmixing. Furthermore, due to the turbulence of the fluid in the pipe, some radial and axial mixing occurs in the straight parts. The floc tubes are sized so that the flow in the straight parts is turbulent.
Application of floc tube
Floc Tubes are used in a number of applications where chemicals are combined with waste streams to aid in coagulation and flocculation prior to separation:
• DAF (Disposable Air Flotations)
• Belt Filter PressFine Screening
• Thickeners for Gravity Belts
Netsol Water is one of the most dependable waste management solution providers. Our goal is to make the world's waste management systems more economical, sustainable, and energy-efficient in order to meet the problems of population increase, industrial expansion, and climate change.
Netsol Water can modify the Floc Tube System to give unrivalled wastewater treatment capabilities based on the demands of the customer. CPVC pipe may be used to build floc tubes for higher temperature flows. Standard frames are made of galvanized carbon steel and can be ordered in stainless steel if so desired. The units include three injector ports as standard, together with check valves and shut-off valves. Additional injector and sample ports, as well as other orientations, can be added to the units.
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