Zero Chemicals, Zero Hazardous Waste: CDFU Pure Physical Demulsification Technology Leads the Green Transformation
Driven by the dual forces of the "dual carbon" goals and the "new quality productive forces" strategy, China's industrial water treatment sector is undergoing a profound "domestic substitution" transformation. In the past, the core equipment for high-difficulty oily wastewater treatment such as oilfields with ultra-high water cut and refinery electro-desalting cut water long relied on imports, with high technical barriers, slow service response, and expensive operation and maintenance costs, becoming a "bottleneck" link restricting the industry's green transformation.
Today, theCDFUcyclone dissolved-air flotation device independently developed by SINOKLE Technology has successfully broken the foreign technology monopoly, not only widely serving domestic giants such as CNPC, Sinopec, and CNOOC, but also reaching overseas markets in Africa and the Middle East, becoming a new business card of "Made in China" in the field of environmental protection equipment.
I. The Dilemma of Traditional Processes: Why Domestic Substitution Is Imperative?
For a long time, in high-difficulty scenarios such as oilfield produced water with ultra-high water cut and refinery electro-desalting cut water, traditional processes have exposed insurmountable shortcomings:
1. Imported Equipment "Unsuited to Local Conditions"
Although some imported flotation equipment is technically mature, facing the complex working conditions common in Chinese oilfields—high emulsification, high polymer content, and large water quality fluctuations—their adaptability and shock resistance are obviously insufficient, and the equipment maintenance cycle is long with high spare parts prices, creating an awkward situation of "affordable to buy but unaffordable to use or repair."
2. Chemical Methods Mired in the "Secondary Pollution" Quagmire
The traditional "chemical demulsification + sedimentation" route relies on large amounts of demulsifiers and flocculants, which not only drives up operating costs but also generates large amounts of oily chemical sludge (hazardous waste). According to estimates, the hazardous waste disposal cost generated annually by a million-ton-scale refining enterprise from this can reach several million yuan.
3. Bulky and Difficult to Retrofit
Old stations generally face the problem of limited site space. Traditional gravity sedimentation tanks and large flotation pools occupy huge areas, with hydraulic retention time of tens of minutes or even hours, which cannot meet the practical needs of "production while retrofitting."
The pain points of the industry are calling for a new solution that is autonomously controllable, efficient and compact, and green and low-carbon.
II.CDFUBreaking the Deadlock: Independent Innovation of Three Core Technologies
SINOKLECDFU (Compact Cyclone Dissolved-air Flotation) device is a precise response to this industry call. It deeply integrates three core processes—cyclone centrifugal separation, ultra-fine bubble generation, and coalescence demulsification—and through independently innovated flow field design and equipment manufacturing, achieves a disruptive improvement in oily wastewater treatment efficiency.
Independent Innovation 1: Ultra-Fine Bubble Generation Technology—Smaller Diameter, Stronger Adsorption
CDFUUsing patented dissolved-air release technology, ultra-fine bubbles with a diameter of only 5–30 μm can be generated. Compared with traditional large bubbles (diameter usually at the hundreds of micrometers to millimeter level), these micro-bubbles have a larger specific surface area and longer residence time in water, and the capture efficiency of tiny emulsified oil droplets (especially stubborn oil droplets with particle size ≤ 2 μm) is multiplied, fundamentally breaking through the bottleneck of traditional flotation in separating fine oil droplets.
Independent Innovation 2: Cyclone Field Enhancement Technology—Synergistic Effect of Centrifugal Force + Flotation
Different from the static separation of conventional flotation tanks,CDFUthe CDFU water inflow adopts a tangential cyclone inflow design, forming a high-speed rotating flow field in the tank. Under the strong centrifugal force, not only are heavy suspended solids quickly thrown to the periphery and settled, but more importantly, the collision probability of oil droplets and micro-bubbles in the cyclone field greatly increases, forming a stable "oil-gas-solid" composite that rapidly floats up. This "cyclone + flotation" synergy reduces the hydraulic retention time from the traditional 15–40 minutes to only 1–5 minutes, improving the treatment efficiency by 3–8 times.
Independent Innovation 3: Pure Physical Demulsification—Completely Saying Goodbye to Chemical Agents
CDFUThrough the strong shear force generated by the cyclone field and the interfacial adsorption effect of micro-bubbles, pure physical demulsification is achieved. The entire separation process requires no addition of any demulsifier or flocculant, eliminating the generation of oily chemical sludge from the source, truly achieving "zero agents, zero hazardous waste, fully green."
III. Hard-Core Track Record: From Large Domestic Refining to African Oilfields
CDFUSINOKLE's technological leadership is not only reflected in theoretical parameters, but has also been rigorously verified in numerous large-scale projects around the world.
CNPCa certain Petrochemical Electro-Desalting Wastewater Treatment Project:The core process adopts "two-stageCDFU CDFU" process, with a treatment scale of 2400 m³/d. Facing the characteristics of high oil content and strong emulsification of electro-desalting cut water,CDFUCDFU operates stably under pure physical, chemical-free conditions, and the effluent oil content stably meets the design requirements, effectively solving the downstream sewage plant shock problem that has long troubled the enterprise, while also having a synergistic removal effect on harmful gases such as hydrogen sulfide.
IV.New Quality Productive Forces:CDFUthe connotation of "high-tech, high-efficiency, high-quality"
In the context of 2024, "new quality productive forces" has become the core yardstick for measuring industrial upgrading.CDFUThe cyclone dissolved-air flotation technology is a vivid embodiment of this concept:
High-tech: Integrating interdisciplinary innovations in fluid mechanics, interface science, and materials science, forming a core technology group with independent intellectual property rights.
High-efficiency: The hydraulic retention time is shortened to1/8–1/3 of traditional processes, the footprint is reduced by more than 70%, and the unit treatment energy consumption is significantly reduced.
High-quality: Single-stage oil removal efficiency>90%, suspended solids removal rate >85%, effluent oil content can be stably <10 mg/L or even <5 mg/L, meeting high-standard reinjection or discharge requirements.
Green and low-carbon:The zero-agent process eliminates the generation of chemical sludge (hazardous waste), and the fully enclosed operation has no waste gas leakage, practicing the environmental mission throughout the full life cycle.
V. Conclusion
From relying on imports to independent innovation, from technology follower to industry leader, SINOKLECDFUgrowth trajectory is a microcosm of China's manufacturing's leap to "Made in China." It proves that through continuous technological deepening and independent breakthroughs in core equipment, domestic equipment is fully capable of replacing imports, and even achieving transcendence in coping with complex working conditions and green environmental protection.
In the future, SINOKLE will continue to closely follow the development needs of the energy industry to "go deep, go difficult, and go green," withCDFUCDFU as the core technology platform, continuously expanding its application boundaries in refining, oilfields, coal chemical industry, landfill leachate, and other fields, serving global customers with more cutting-edge "new quality productive forces" achievements, and guarding the green mountains and clear waters.
