New Treatment Process for Oilfield Produced Water
Oilfield produced water, as a byproduct of the oil extraction process, has always been an important aspect in the petroleum industry. As oilfield extraction continues to deepen, the characteristics of the produced water have become increasingly complex, posing higher requirements for treatment processes. Oilfield produced water, due to differences in its sources and geological conditions, exhibits various characteristics such as high oil content, particulate impurities, and high inorganic salt content. These characteristics make traditional treatment processes difficult to meet the increasingly stringent environmental protection requirements and production needs.
The new process developed by Sinokle Technology combines core technologies such as CDFU Cyclonic Dissolved Gas Flotation Unit, and utilizes a series of innovative methods such as pure physical demulsification and oil removal, double-stage cyclonic dissolved gas flotation, and advanced filtration technology to achieve efficient treatment of produced water.
Pure physical demulsification and oil removal is a major highlight of this process. Traditional chemical demulsification methods often require the addition of a large amount of chemicals, resulting in the production of a large amount of oily sludge residue, which not only increases treatment costs but may also cause secondary pollution. However, Sinokle's new process achieves demulsification through physical means without the need for any chemicals, thereby avoiding the problem of secondary pollution. The application of this technology not only improves treatment efficiency but also significantly reduces treatment costs.
Cyclonic dissolved gas flotation technology is another core component of this process. This technology combines cyclonic separation and dissolved gas flotation technologies to achieve efficient separation of oil and suspended matter. Compared with traditional flotation technologies, cyclonic dissolved gas flotation exhibits stronger shock resistance and stability, ensuring stable and reliable subsequent treatment. The application of this technology has significantly improved the quality of the treated water, meeting stricter environmental protection requirements.
In addition, Sinokle's new process also adopts advanced filtration technology. This technology further removes tiny particles and impurities in the water through high-precision filtration devices, ensuring stable compliance with water quality standards. The application of this technology not only improves treatment efficiency but also provides strong support for subsequent reinjection and discharge.
In practical applications, Sinokle's new process has achieved remarkable results. Taking the produced water treatment equipment of a certain oilfield in Xinjiang as an example, the inlet sewage contains up to 1000 ppm of oil and 500 ppm of suspended solids (SS). The project utilizes two-stage CDFU cyclonic dissolved gas flotation units with a treatment capacity of 2400 cubic meters per day. After treatment, the oil content and suspended solids content at the CDFU water outlet are significantly reduced to below 10 ppm, fully meeting environmental protection requirements and production needs.
The characteristics of Sinokle's CDFU (Cyclonic Dissolved Gas Flotation Unit) equipment are mainly reflected in the following aspects:
Efficient Treatment:
The CDFU equipment combines various technologies such as cyclonic centrifugal separation, ultrafine bubble generation, and dissolved gas flotation to achieve efficient and comprehensive removal of multiple pollutants in various difficult-to-treat wastewaters.
Compared with traditional dissolved gas flotation technologies, the residence time of sewage in the CDFU equipment is shorter, only 1/8 to 1/3 of that of traditional processes, significantly improving treatment efficiency.
High Oil and Suspended Solids Removal Rates:
The single-stage oil removal efficiency of CDFU equipment exceeds 90%, and the suspended solids removal rate is greater than 80%, with a removal particle size of less than 3 micrometers, demonstrating extremely high treatment effectiveness.
The ultrafine bubbles produced by the equipment have a diameter of only 530 micrometers (traditional processes are 5100 micrometers) and exhibit good uniformity, contributing to more efficient removal of oil and suspended matter in sewage.
Small Footprint and Low Investment Cost:
The CDFU equipment adopts a skid-mounted design, with factory assembly, fast on-site construction, short construction duration, and rapid commissioning.
The equipment occupies an extremely small footprint, only one-third of that of traditional equipment, greatly saving land resources.
The supporting equipment and capital investment are low, and the comprehensive investment cost is low, offering high cost-effectiveness.
Safe and Environmentally Friendly:
The CDFU equipment operates in a fully enclosed and pressurized manner without odorous gas leakage, ensuring safety and reliability.
The equipment adopts pure physical demulsification technology without the use of chemicals, resulting in low operation and maintenance costs and high efficiency. It avoids secondary pollution, is environmentally friendly, and green.
High Degree of Automation and Convenient Operation:
The CDFU equipment features a high degree of automation, supporting remote monitoring, fully automated, unmanned operation, convenient operation, labor savings, and safety.
The equipment is highly stable, with no filters, coalescing plates, or other internals, eliminating dependence on structures and reducing the risk of clogging, ensuring stable treatment effects.
In summary, Sinokle's CDFU equipment, with its characteristics of efficient treatment, high oil and suspended solids removal rates, small footprint and low investment cost, safety and environmental friendliness, as well as a high degree of automation and convenient operation, has broad application prospects in the field of oilfield produced water treatment and provides new solutions for the treatment of oilfield produced water.
