Efficient Treatment of Oily Wastewater in Power Plants — SINOKLE's New Technology Supports Green Power Development
The power industry is the lifeblood of the national economy, and thermal power generation is its mainstay. Yet in the course of generating electricity, power plants produce large volumes of industrial wastewater, of which oily wastewater is an environmental challenge that cannot be ignored.
Whether it is oily water from boiler cleaning, wastewater from desulfurization systems, or oily discharge during turbine maintenance, if such wastewater is discharged without effective treatment it not only causes serious environmental pollution but may also violate increasingly strict environmental regulations. In particular, as national discharge standards for industrial enterprises have been raised year after year, oily wastewater treatment has become an issue the power industry must confront.
The "difficulty" of power plant oily wastewater lies in its complexity. This kind of wastewater usually contains several types of pollutants:
Crude oil and lubricating oil: coming from equipment maintenance, pipeline cleaning and similar operations
Suspended solids: including silt, rust and other solid particles
Chemical reagents: residues of the various chemicals used in water treatment
High salinity: especially desulfurization wastewater, which has an extremely high salt content
More troublesome still, oily wastewater from different sources varies greatly in character. Some has an oil content of only tens of ppm, while other streams reach hundreds of thousands of ppm — this enormous variability poses a major challenge to the design and operation of treatment processes.
Conventional treatment methods have obvious shortcomings: oil-intercepting ponds occupy large areas and perform inconsistently; flotation equipment removes emulsified oil poorly; chemical reagent methods easily cause secondary pollution... Power plants urgently need an efficient, economical and stable solution.
Addressing the industry's pain points in power plant oily wastewater treatment, SINOKLE has drawn on years of accumulated technology to launch a comprehensive treatment package for oily wastewater in power plants.
Core Technology One: CDFU Cyclonic Dissolved Air Flotation Unit
The core innovation of this technology lies in combining cyclonic separation with flotation separation. Put simply, it lets wastewater complete oil-water separation within a high-speed rotating centrifugal force field, greatly improving efficiency.
Core Technology Two: KHC Coalescing Oil Separator
This unit uses special coalescing material to make tiny oil droplets dispersed in water gradually coalesce into large oil beads, thereby separating oil from water. Compared with conventional equipment, the KHC coalescing oil separator handles emulsified oil much more effectively and is especially suited to wastewater with widely fluctuating oil content and small droplet sizes.
Core Technology Three: KFM Active Filter Media Filter
The KFM filter uses a specially formulated active filter media that not only removes suspended solids efficiently but also further adsorbs residual oil. The media can be backwashed and regenerated, keeping long-term costs low.
Advantages of the Combined Process
SINOKLE flexibly combines the above equipment according to each power plant's actual needs to form a targeted treatment scheme. This combined process offers the following advantages:
Wide treatment range: handles wastewater with oil content from tens of ppm to hundreds of thousands of ppm
Good results: treated effluent oil content can drop below 5 ppm, with a removal rate above 99%
Stable operation: a high degree of automation means no dedicated operator is required
No secondary pollution: purely physical treatment with no chemical reagents added
Typical Cases
Case One: A back-pressure cogeneration project in Shaanxi Province
The oily wastewater from this power plant has an oil content as high as 500,000 ppm (that is, 50%), making treatment extremely difficult. SINOKLE applied a combined "filter + KHC coalescing oil separator" process, and the final effluent oil content dropped below 5 ppm with a removal rate above 99%, far beyond the discharge standard.
Case Two: Wastewater treatment project at a heavy oil power plant in Sierra Leone
The project adopted a "CDFU+CDFU + KFM" three-stage treatment process with equally outstanding results: inlet wastewater with oil content below 50 mg/L and suspended solids below 80 mg/L, after treatment, yielded effluent with oil below 10 mg/L and suspended solids below 20 mg/L, with all indicators meeting the discharge standard.
The Environmental Responsibility of Green Power
Guided by the "dual carbon" goals, green and low-carbon development has become the main theme of the power industry. Efficient treatment of oily wastewater in power plants is not merely a matter of environmental compliance; it is also part of how a plant fulfils its social responsibility and pursues sustainable development. Centered on technological innovation, SINOKLE provides power plants with efficient and reliable oily wastewater treatment solutions that support green power development.
