Dedicated Solution for Heavy Oil Oily Wastewater in Power Plants
Oily wastewater generated by heavy oil systems in power plants (heavy oil storage tanks, oil transfer pipelines, condensate discharge from combustion systems, etc.) contains heavy oil, emulsified oil, suspended particulate matter and a small amount of additives, exhibiting characteristics of "high viscosity, stable emulsification and severe COD exceedance". This has become a critical pain point for environmental compliance in power engineering: conventional treatment processes are prone to clogging and incomplete separation, which not only paralyses the wastewater treatment system but may also affect compliance acceptance and long-term stable operation of overseas projects.
SINOKLE has long been deeply engaged in oily wastewater treatment for the power industry, building a customised solution for the heavy oil wastewater scenario in power plants. Leveraging a combined process of "two-stage CDFU cyclonic dissolved-air flotation +CDOF ozone advanced catalytic oxidation", it successfully won the bid for a large iron ore supporting heavy oil power plant project in Guinea, Africa, and has been verified on site in a number of benchmark power and refining projects at home and abroad, including PetroChina and Urumqi Petrochemical. It provides power design institutes and overseas general contracting companies with full-process support that is "technically reliable + highly adaptable + cost-controllable".
I. Core pain points of heavy oil oily wastewater in power plants (precisely matched to scenario needs)
1. Difficult separation: heavy oil has high viscosity (kinematic viscosity at 20 C can reach 100-500 mm2/s) and forms a stable emulsion with water, which conventional water separators and settling tanks cannot break; the oil content often exceeds 1000 ppm and COD exceeds the standard by 3-5 times. For example, the wastewater from the power plant supporting the Guinea iron ore project also contains high-viscosity petroleum pollutants such as diesel, along with suspended solids such as silt and iron oxide dust, compounded by heavy metal pollution, making treatment extremely complex.
2. Difficult working condition adaptation: the wastewater is mostly discharged intermittently (tank condensate discharge, maintenance drainage), with large flow fluctuations (10-50 m3/h). Overseas projects further face multiple constraints such as drastic water volume fluctuations in the rainy season, compact sites and stringent environmental standards (such as the EU EEA and new regional environmental regulations in Africa).
3. High system compatibility requirements: the system must interface with the power plant's existing wastewater collection system, and the treated water quality must meet the receiving standards of the wastewater treatment plant (oil content <= 10 ppm) to avoid affecting subsequent biological treatment. The Guinea project further requires a high standard of wastewater reuse and near-zero discharge.
4. Sensitivity to operation and maintenance costs: overseas projects have extremely high requirements for equipment failure rates, spare parts supply and remote operation and maintenance capability. Conventional processes are prone to scaling, require frequent chemical dosing and entail high sludge disposal costs, making it difficult to meet long-term stable operation requirements.
II. The SINOKLE dedicated solution: three core advantages that directly address scenario pain points
1. Customised technology: designed specifically for demulsification and separation of heavy oil wastewater, overcoming extreme working conditions
Combined process of efficient demulsification + advanced purification: for highly complex oily wastewater, it innovatively adopts a three-stage treatment scheme of "two-stage CDFU cyclonic dissolved-air flotation +CDOF ozone advanced catalytic oxidation".CDFUThe system generates 5-30 um micro-nano bubbles for physical demulsification, rapidly separating petroleum pollutants with a removal rate of over 95% and strong shock resistance, easily coping with rainy-season flow fluctuations. The subsequent CDOF ozone catalytic oxidation unit, through multiple catalytic technologies, raises the COD removal rate of refractory organics to more than 80% and can also effectively decompose heavy metal complexes, so that the treated water quality fully meets reuse and near-zero discharge requirements.
Anti-viscosity and anti-fouling adaptive design: optimised equipment flow channels and bubble release technology adapt to the high-viscosity characteristics of heavy oil, avoiding clogging. The system can handle highly polluted wastewater with an oil concentration of 500-5000 ppm, covering the full range of scenarios including power plant tank water separation, oil pipeline drainage and maintenance wastewater, and can also handle extreme working conditions of multi-medium composite pollution.
Modular and skid-mounted flexible configuration: it supports small-scale intermittent operation (10-20 m3/h) through to large-scale continuous treatment (such as 240 m3 per day for the Guinea project), with equipment dimensions customisable to the plant site. A 10-20 m3/h system occupies only 10 m x 5 m, and the skid-mounted design can be shipped directly to site for rapid assembly, greatly reducing overseas construction costs.
2. Engineering implementation: mature cases + efficient delivery, reducing risk for design institutes and general contractors
Reusable global benchmark cases: the company has several benchmark projects at home and abroad, including the heavy oil power plant supporting the Guinea iron ore project in Africa, heavy oil storage tank water separation treatment at the Urumqi Petrochemical power plant, and mixed waste oil purification at a Sichuan power plant. It can provide complete process drawings, working condition adaptation parameters and energy consumption accounting reports, helping power design institutes quickly incorporate them into project designs and shortening the design cycle. For overseas projects, it can also provide technical solution references and compliance acceptance experience for similar scenarios.
Dual assurance of overseas compliance + rapid delivery: Chinese and English technical documents and support for international certifications such as CE/ISO are provided, adapting to the environmental standards of different countries and solving the compliance acceptance challenges of overseas projects. Drawing on mature modular design experience, efficient delivery can be achieved: the Guinea project took only 3 months from contract signing to completion of equipment manufacturing and testing, 30% shorter than the industry average cycle, providing strong support for overseas general contracting projects to save schedule and reduce risk.
Full-process global service: for overseas projects, the company provides standardised equipment packaging, cross-border logistics solutions and on-site installation and commissioning guidance to ensure rapid deployment and production. It has successfully delivered wastewater treatment projects in Bangladesh, Chad, Congo, Sierra Leone and other countries, with extensive experience in transnational construction and operation and maintenance services.
3. Low-cost operation and maintenance: a win-win for the environment and the economy, empowering the entire project life cycle
Green and low-carbon + cost optimisation: the process requires no demulsifier or flocculant, reducing chemical costs and secondary pollution, while sludge volume is reduced by 90%, greatly lowering sludge disposal costs; CDOF the ozone utilisation rate of the unit is 4 times that of conventional technology, with significant energy savings, and the overall annual operating cost can be reduced by 40%.
Low energy consumption + easy maintenance design: the equipment's operating energy consumption is only 60% that of conventional air flotation processes, the service life of core components exceeds 10 years, and 24-hour remote operation and maintenance diagnostics are supported. For overseas projects, long-term spare parts supply and technical support can be provided, greatly reducing transnational operation and maintenance costs.
Resource recovery value: the separated heavy oil can be recovered and reprocessed, and the Guinea project further achieves wastewater reuse, realising the dual benefits of "environmental treatment + resource reuse" and enhancing the project's economic benefits and green competitiveness.
III. Cooperation scenarios: focused on power plants and overseas energy projects
Power design institutes: design of heavy oil storage tank wastewater treatment systems for power plants, process integration for oily wastewater, optimisation of project environmental compliance schemes, and technical adaptation design for overseas projects;
Overseas general contracting companies: oily wastewater treatment packages for overseas power plant EPC projects, environmental engineering for heavy oil refining and chemical integration projects, wastewater compliance retrofits for cross-border power projects, and construction of wastewater treatment systems for mining-related energy projects.
From large domestic power plants to global energy hubs in Africa and Southeast Asia, SINOKLE has consistently demonstrated the technical strength and delivery reliability of a Chinese environmental protection equipment enterprise through scenario-based technology, engineering implementation and global service. We continue to deepen cooperation with international energy and mining giants, helping power design institutes enhance their design competitiveness and helping overseas general contracting companies overcome the challenges of heavy oil oily wastewater treatment, achieving project environmental compliance, controllable costs and long-term stable operation, protecting the global ecology with innovative technology!
