Beyond Separation: Sinokle’s CDFU+CDOF Delivers Dual Benefits of Environmental Protection & Resource Reuse
The oily wastewater generated from the heavy oil systems of power plants (including heavy oil storage tanks, oil transmission pipelines, and condensate drainage of combustion systems, etc.) contains heavy oil, emulsified oil, suspended particulates and a small amount of additives. It exhibits the characteristics of high viscosity, stable emulsification and severe COD exceeding standards, emerging as a critical pain point for achieving environmental compliance in power engineering projects.
Conventional treatment processes are prone to clogging and incomplete separation, which not only causes paralysis of the wastewater treatment system but also may hinder the compliance acceptance and long-term stable operation of overseas projects.
Sinokle (Shenzhen) has deep expertise in oily wastewater treatment for the power industry, and has developed customized solutions tailored to the scenario of heavy oil wastewater in power plants. Relying on its combined process of two-stage CDFU (Cyclonic Dissolved Gas Flotation Unit) + CDOF (Cyclonic Dissolved Ozone Flotation Unit), the company has successfully won the bid for a heavy oil power plant project supporting a large iron mine in Guinea, Africa. This technology has been put into practice and verified in multiple benchmark power/refining projects at home and abroad, including China National Petroleum Corporation (CNPC). Sinokle provides full-process support featuring reliable technology, strong adaptability and controllable costs for power design institutes and overseas general contractors.
I. Core Pain Points of Heavy Oil Oily Wastewater in Power Plants (Precisely Matching Scenario Requirements)
1. High separation difficulty: Heavy oil has high viscosity (the kinematic viscosity can reach 100-500 mm²/s at 20℃) and forms a stable emulsion with water. Conventional equipment and sedimentation tanks cannot achieve demulsification, resulting in oil content often exceeding 1000 ppm and COD exceeding the standard by 3 to 5 times. For example, the wastewater from the power plant supporting the iron mine in Guinea also contains high-viscosity petroleum pollutants such as diesel oil, as well as suspended solids like sludge and iron oxide dust, coupled with heavy metal pollution, leading to extremely high treatment complexity.
2. Poor adaptability to working conditions: Wastewater is mostly discharged intermittently (condensate drainage from storage tanks, sewage discharge during maintenance) with large flow fluctuations (10-50 m³/h). Overseas projects are further faced with multiple constraints such as drastic fluctuations in water volume during the rainy season, compact site space, and stringent environmental standards (e.g., EU EEA, new African regional environmental regulations).
3. High requirements for system compatibility: The treatment system must connect with the existing sewage collection system of power plants, and the effluent quality after treatment must meet the receiving standards of sewage treatment plants (oil content ≤10 ppm) to avoid affecting subsequent biochemical treatment processes. The Guinea project also has high-standard requirements for wastewater reuse and near-zero discharge.
4. Sensitivity to operation and maintenance (O&M) costs: Overseas projects have extremely high requirements for equipment failure rate, spare parts supply and remote O&M capabilities. Traditional processes are prone to scaling, require frequent chemical dosing, and entail high sludge disposal costs, making it difficult to meet the demand for long-term stable operation.
II. Sinokle's Customized Solution: Three Core Advantages Targeting Scenario Pain Points
1. Customized technology: Designed exclusively for demulsification and separation of heavy oil wastewater, overcoming extreme working conditions
Combined process of high-efficiency demulsification + advanced purification: A pioneering three-stage treatment scheme of two-stage CDFU + CDOF is adopted for high-complexity oily wastewater. The CDFU system generates 5-30 μm micro-nano bubbles for physical demulsification, rapidly separating petroleum pollutants with a removal rate of over 95%. It features strong shock resistance and can easily cope with flow fluctuations during the rainy season. The subsequent CDOF ozone catalytic oxidation unit adopts multiple catalytic technologies, increasing the removal rate of refractory organic matter (COD) to over 80% and effectively decomposing heavy metal complexes. The effluent quality after treatment fully meets the requirements for reuse and near-zero discharge.
Viscosity and pollution resistance adaptive design: The equipment flow channels and bubble release technology are optimized to adapt to the high viscosity of heavy oil and avoid clogging. It can treat high-pollution wastewater with an oil concentration of 500-5000 ppm, covering all scenarios of power plants such as water draining from storage tanks, sewage discharge from oil transmission pipelines and maintenance wastewater. It is also capable of coping with extreme working conditions with multi-medium composite pollution.
Flexible modular and skid-mounted configuration: It supports small-scale intermittent operation (10-20 m³/h) to large-scale continuous treatment (e.g., the Guinea project with a daily treatment capacity of 240 cubic meters). The equipment size can be customized according to the site space of power plants, and a 10-20 m³/h system covers an area of only 10m×5m. The skid-mounted design enables direct sea transportation and on-site quick assembly, significantly reducing overseas construction costs.
2. Low-cost O&M: Achieving a win-win for environmental protection and economy, empowering the whole life cycle of projects
Green low-carbon and cost optimization: The process does not require the addition of demulsifiers and flocculants, reducing chemical costs and secondary pollution. Meanwhile, the sludge yield is reduced by 90%, drastically cutting sludge disposal costs. The ozone utilization rate of the CDOF unit is 4 times that of traditional technologies, realizing significant energy savings, and the overall annual operating cost can be reduced by 40%.
Low energy consumption and easy maintenance design: The operating energy consumption of the equipment is only 60% of that of traditional dissolved air flotation processes, and the service life of core components exceeds 10 years. It supports 24/7 remote O&M diagnosis, and long-term spare parts supply and technical support are available for overseas projects, greatly lowering cross-border O&M costs.
Resource recovery value: The separated heavy oil can be recycled and refined, and the Guinea project has realized wastewater reuse, achieving dual benefits of environmental treatment + resource reuse and enhancing the economic benefits and green competitiveness of projects.
III. Cooperation Scenarios: Focus on Power Plants and Overseas Energy Projects
Power design institutes: Design of heavy oil storage tank wastewater treatment systems in power plants, integration of oily wastewater treatment processes, optimization of project environmental compliance schemes, and technical adaptive design for overseas projects.
Overseas general contractors: Supporting oily wastewater treatment for EPC projects of overseas power plants, environmental protection engineering for integrated heavy oil refining and chemical projects, renovation of sewage treatment to meet standards for cross-border power projects, and construction of wastewater treatment systems for energy projects supporting mining industry.
From large domestic power plants to global energy hubs in Africa, Southeast Asia and other regions, Sinokle (Shenzhen) has always demonstrated the technical strength and delivery reliability of Chinese environmental protection equipment enterprises with scenario-based technology, engineering implementation and global services. We continue to deepen cooperation with international energy and mining giants, help power design institutes enhance their design competitiveness, assist overseas general contractors in solving the challenges of heavy oil oily wastewater treatment, and realize project environmental compliance, cost control and long-term stable operation, safeguarding the global ecology with innovative technology!
