Application of the High-Efficiency Coalescing Oil Remover in Oily Wastewater Treatment
In industrial production, oily wastewater treatment is a difficult problem in the environmental field. It features uneven oil-water mixing, small oil droplet size, a high degree of emulsification and the presence of chemical additives. Conventional treatment methods suffer from low removal efficiency, high cost, complex operation and a large footprint, pushing industry to seek more efficient and economical technologies. I. Characteristics and treatment challenges of oily wastewater Oily wastewater mainly comes from oil extraction and processing, machinery manufacturing and other industries, and contains large amounts of suspended oil droplets, emulsified oil and dissolved oil, with a complex composition. The emulsion is highly stable, so conventional physical separation methods such as gravity settling and flotation are inefficient and struggle to meet environmental standards. Treatment faces many challenges: - Low oil-water separation efficiency; hard to meet discharge standards. - Emulsified oil is hard to demulsify; fine droplets are difficult to remove. - Conventional methods consume much energy and cost much to run. - Frequent manual maintenance is required and operation is complex. II. Principle and advantages of the high-efficiency coalescing oil remover The high-efficiency coalescing oil remover uses advanced coalescing technology, employing oleophilic media to adsorb and coalesce fine oil droplets and accelerate oil-water separation. Its internal flow field is optimised by CFD to ensure efficient wastewater flow; specially designed coalescing internals enlarge the oil droplet size; fully automatic control reduces manual intervention; and enclosed pressurised oil removal avoids secondary pollution. The advantages of this equipment are significant: - Efficient oil removal: removes oil droplets smaller than 10 microns, with treatment efficiency above 99%. - Stable performance, suitable for oily wastewater of different concentrations and types. - Energy-saving and environmentally friendly: low-energy design, low operating cost. - Easy to operate: highly automated, easy to maintain. - Small footprint, only 1/3 of conventional processes, easy to install. III. Application prospects of the high-efficiency coalescing oil remover As environmental regulations tighten and enterprises attach greater importance to sustainable development, the high-efficiency coalescing oil remover has broad application prospects and can be used in petrochemicals, machinery manufacturing, shipping, municipal wastewater treatment and other industries: - Petrochemical industry: helps refineries and chemical plants bring wastewater up to standard. - Machinery manufacturing: treats oily wastewater from processing and raises the water recycling rate. - Shipping: treats oily wastewater to comply with International Maritime Organization rules. - Municipal wastewater treatment: serves as pretreatment equipment and improves overall treatment efficiency.
Figure: Oily electric desalting drained water treatment case at a petrochemical plant in Hebei
In actual application, the electric desalting drained water at a Hebei petrochemical plant had an influent oil content above 5000 mg/L; after two-stage CDFU units + high-efficiency coalescing oil removers, the effluent oil was <50 mg/L and suspended solids <100 mg/L; at a Sichuan petrochemical plant, oily wastewater with an influent oil content above 10000 mg/L was treated by a single-stage coalescing oil remover + a single-stage CDFU unit, and the effluent oil was <100 mg/L with an oil removal rate above 98% and a retention time of only 15-20 min.
Figure: Oily wastewater treatment case at a petrochemical plant in Sichuan
Through long-term industrial verification, the high-efficiency coalescing oil remover treats oily wastewater quickly and efficiently, outperforming other equipment. With further technological progress and optimisation, it is expected to reduce costs and raise efficiency further, providing enterprises with an economical and efficient oily wastewater treatment solution.
