Refinery Wastewater Treatment Innovation: From Traditional Processes to the CDFU Cyclonic Dissolved Air Flotation Breakthrough
Some refineries also use combined processes such as 'inclined-plate settling tank + walnut shell/fiber ball filtration' or 'settling tank + centripetal flotation + fiber ball/multi-media filtration + ceramic membrane'. These traditional methods met basic treatment needs for a time, but have obvious defects: unstable performance, poor shock resistance, and a tendency to form aged oil; complex process flow, large footprint, difficult operation and maintenance; and, more importantly, they require chemical dosing, which may cause secondary pollution.
Especially with high pollutant concentrations or flow fluctuations, traditional processes often fail to run stably, effluent quality fluctuates greatly, and increasingly strict discharge standards cannot be met.
Technology breakthrough: SINOKLE CDFU cyclonic dissolved air flotation unit
The SINOKLE CDFU cyclonic dissolved air flotation unit integrates cyclonic centrifugal separation, dissolved air flotation and ultrafine bubble technology, bringing a revolutionary breakthrough in refinery wastewater treatment.
Core technical advantages:
· High-efficiency treatment: single-stage oil removal efficiency above 90%, suspended solids removal above 85%, effluent oil stably controlled below 5 mg/L
· Ultra-fast treatment: residence time of only 1-5 minutes, 3-8 times more efficient than traditional flotation
· Zero chemical dosing: purely physical demulsification eliminates oily sludge at the source and avoids secondary pollution
· Compact intelligent design: skid-mounted structure occupies only 1/3 of traditional equipment, with IoT integration for remote monitoring
Field application results
In actual projects, CDFU technology demonstrates outstanding performance. In the electro-desalting wastewater treatment project of a petrochemical company in Cangzhou, Hebei, the company adopted the "coalescing pressure deoiler + CDFU cyclonic dissolved air flotation" combined process, and the technology successfully achieved efficient water purification.
In a black water treatment project at a petrochemical company in Xinjiang, the "coalescing pressure deoiler + two-stage CDFU cyclonic dissolved air flotation" combined process achieved a single-unit treatment capacity of 150 m³/h with stable, compliant effluent.
Particularly noteworthy, CDFU units adopt a modular design - easy to install with a short construction period - ideal for upgrading existing refinery facilities. Their intelligent operation system greatly cuts labor costs, enabling fully automatic unattended operation.
Technology comparison and prospects
Compared with traditional processes, CDFU technology has clear advantages in treatment performance, operating cost and environmental benefits. Its purely physical demulsification not only keeps treatment green, but also saves enterprises substantial chemical costs.
As environmental policies continue to tighten and the refining industry upgrades, SINOKLE CDFU technology is becoming the industry's preferred wastewater treatment solution. It not only relieves the current environmental pressure on refiners, but also provides reliable technical support for the industry's sustainable development.
