SINOKLE CDFU Cyclonic Dissolved Gas Flotation Technology: Leading a New Revolution in Oily Wastewater Treatment
In industrial oily wastewater treatment, conventional flotation technology has long faced bottlenecks of low efficiency, severe secondary pollution and large footprints. Conventional dissolved air flotation (DAF) and cyclonic flotation (CFU) technologies suffer from large bubble size (5-100 um), poor uniformity, long retention times (15-40 minutes) and limited oil removal efficiency (60%-85%), and require chemical dosing, generating large amounts of oily sludge and causing secondary pollution and environmental risk.
SINOKLE's CDFU cyclonic dissolved gas flotation technology integrates cyclonic centrifugal separation, dissolved gas flotation and ultra-fine bubble technology to achieve an efficient, green and compact wastewater treatment innovation. Its core breakthroughs are:
Ultra-fine bubble technology: generates uniform ultra-fine bubbles only 5-30 um in diameter, greatly increasing the collision probability and adhesion efficiency between bubbles and oil droplets, with single-stage oil removal above 90% and suspended solids removal above 85%, and can handle emulsified oil with droplets smaller than 3 um.
Purely physical demulsification: no chemicals at all throughout the process, eliminating oily sludge (hazardous waste) at the source; the separated waste oil can be recovered and reused, achieving both environmental and economic benefits.
Efficient compact design: hydraulic retention time of only 1-5 minutes, just 1/8-1/3 of conventional processes; the skid-mounted modular design reduces footprint to 1/3 of conventional equipment, particularly suited to space-constrained sites.
Intelligent stable operation: fully automatic closed-loop control with strong shock-load resistance, adaptable to water-quality fluctuations (such as instantaneous oil shocks of 40%), supporting remote monitoring and unattended operation and significantly reducing O& M costs.
CDFU technology combines cyclonic centrifugation with ultra-fine bubble synergy for efficient separation
Application Scenarios and Results
CDFU technology has been widely applied to oilfield produced water, refinery desalter wastewater, offshore platform polymer-bearing wastewater, coking sour water and other difficult scenarios. In projects such as PetroChina Dushanzi Petrochemical (2,400 m³/d), Sinopec Cangzhou Refining and Chemical (1,200 m³/d) and oilfield produced water treatment in Congo, Africa (4500m³/d), the CDFU has consistently achieved stable compliance of effluent oil content, effectively solving the clogging and low-efficiency problems of conventional processes.
CDFU skid-mounted equipment in industrial field application
SINOKLE CDFU technology, with its purely physical, zero-chemical, highly efficient and energy-saving advantages, has become the ideal choice to replace conventional flotation in industrial wastewater treatment, providing technical support for green and sustainable development in petrochemical, power, marine and other industries.
