scholarly journals Experimental Study on Downhole Oil-water Separation Hydrocyclone

2015 ◽  
Vol 8 (1) ◽  
pp. 257-261 ◽  
Author(s):  
Xu Yan ◽  
Yuan Lin ◽  
Wang Zunce ◽  
Li Sen ◽  
Zhang Jinglong ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Orthogonal Experiment ◽  
Flow Characteristics ◽  
Internal Flow ◽  
Practical Application ◽  
Water Separation ◽  
Rotating Speed ◽  
Split Ratio ◽  
Oil Water Separation ◽  
Oil Water

In the process of downhole oil-water separation, the traditional liquid-liquid separation hydrocyclone (LLSH) is used in conjunction with screw pumps, which makes the hydrocyclone rotating around its own axis. The rotation of wall of hydrocyclone affects its internal flow characteristics and separation properties directly. The orthogonal experiment of the downhole oil-water separation hydrocyclone (DOWSH) is designed to analyze the effect of flowrate, rotating speed and split ratio on separation efficiency and pressure drop, The primary and secondary factors of operation parameters have been studied, and the optimum condition and reasonable working range of DOWSH have been obtained. It provides reliable basis for process of practical application of DOWSH􀀁so as to guide the production.

Oil-Water Separation in a Novel Liquid-Liquid Cylindrical Cyclone (LLCC©) Compact Separator—Experiments and Modeling

2004 ◽  
Vol 126 (4) ◽  
pp. 553-564 ◽  
Author(s):  
C. Oropeza-Vazquez ◽  
E. Afanador ◽  
L. Gomez ◽  
S. Wang ◽  
R. Mohan ◽  
...  
Keyword(s):  
Experimental Data ◽  
Flow Rate ◽  
Separation Efficiency ◽  
Free Water ◽  
Water Stream ◽  
Water Separation ◽  
Split Ratio ◽  
Cylindrical Cyclone ◽  
Oil Water Separation ◽  
Oil Water

The hydrodynamics of multiphase flow in a Liquid-Liquid Cylindrical Cyclone (LLCC) compact separator have been studied experimentally and theoretically for evaluation of its performance as a free water knockout device. In the LLCC, no complete oil-water separation occurs. Rather, it performs as a free-water knockout, delivering a clean water stream in the underflow and an oil rich stream in the overflow. A total of 260 runs have been conducted, measuring the LLCC separation efficiency for water-dominated flow conditions. For all runs, an optimal split-ratio (underflow to inlet flow rate ratio) exists, where the flow rate in the water stream is maximum, with 100% watercut. The value of the optimal split-ratio depends upon the existing inlet flow pattern, and varies between 60% and 20%. For split-ratios higher than the optimal one, the watercut in the underflow stream decreases as the split-ratio increases. A novel mechanistic model has been developed for the prediction of the complex flow behavior and the separation efficiency in the LLCC. Comparisons between the experimental data and the LLCC model predictions show excellent agreement. The model is capable of predicting both the trend of the experimental data as well as the absolute measured values. The developed model can be utilized for the design and performance analysis of the LLCC.

Design of Downhloe Oil-Water Cyclone Separator and the Study of Laboratory Experiment

2011 ◽  
Vol 339 ◽  
pp. 630-633
Author(s):  
Wen Bin Cai ◽  
Yuan Gang Xu ◽  
Qi Zhang
Keyword(s):  
Laboratory Experiment ◽  
Pressure Loss ◽  
Separation Efficiency ◽  
Cyclone Separator ◽  
Water Separation ◽  
Split Ratio ◽  
Oil Water Separation ◽  
Oil Water ◽  
Relationship Of ◽  
The Relationship

The cyclone plays an important role in the downhole oil-water separator during artificial lift for high water cut oil well, the processes of oil-water separation is completing in the cyclone. The oil-water cyclone separator was designed based on the oil and water density contrast and the cyclone separation theory; the laboratory experiment of cyclone separator was carried out and the relationship of the cyclone oil cut of apex and split ratio, oil-water separation efficiency and the velocity , the pressure loss of the cyclone and the velocity were also studied. When the reinjectivity is within 70% of the produced volume, cyclone separator has good water-oil separation ability, split ratio increased with the increase of the vecolity, when the flow vecolity reached 0.25m/s, the split ratio over 30%. But with the increase of the velocity, the increased rate of the split ratio is reduced. The relationship of the flow rate and cyclone intrinsic pressure loss is nonlinear exponential curve.

scholarly journals Dodecyl Mercaptan Functionalized Copper Mesh for Water Repellence and Oil-water Separation

2021 ◽  
Vol 18 (4) ◽  
pp. 887-899
Author(s):  
Yanling Tian ◽  
Jiekai Feng ◽  
Zexin Cai ◽  
Jiaqi Chao ◽  
Dawei Zhang ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Synthesis Process ◽  
Water Separation ◽  
Oil Water Separation ◽  
One Step ◽  
Oil Water ◽  
Water Repellence ◽  
Copper Mesh ◽  
Dodecyl Mercaptan

AbstractReckless discharge of industrial wastewater and domestic sewage as well as frequent leakage of crude oil have caused serious environmental problems and posed severe threat to human survival. Various nature inspired superhy-drophobic surfaces have been successfully applied in oily water remediation. However, further improvements are still urgently needed for practical application in terms of facile synthesis process and long-term durability towards harsh environment. Herein, we propose a simple one-step dodecyl mercaptan functionalization method to fabricate Super-hydrophobic-Superoleophilic Copper Mesh (SSCM). The prepared SSCM possesses excellent water repellence and oil affinity, enabling it to successfully separate various oil-water mixtures with high separation efficiency (e.g., > 99% for hexadecane-water mixture). The SSCM retains high separating ability when hot water and strong corrosive aqueous solutions are used to simulate oil-water mixtures, indicating remarkable chemical durability of the dodecyl mercaptan functionalized copper mesh. Additionally, the efficiency can be well maintained during 50 cycles of separation, and the water repellence is even stable after storage in air for 120 days, demonstrating the reusability and long-term stability of the SSCM. Furthermore, the functionalized mesh also shows good mechanical robustness towards abrasion by sandpaper, and oil-water separation efficiency of > 96% can be obtained after 10 cycles of abrasion. The reported one-step dodecyl mercaptan functionalization could be a simple method for increasing the water repellence of copper mesh, and thereby be a great candidate for treating large-scale oily wastewater in harsh environments.

scholarly journals Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Peng Hong ◽  
Zhu Liu ◽  
Yang Gao ◽  
Yubin Chen ◽  
Mingxun Zhuang ◽  
...  
Keyword(s):  
Large Scale ◽  
Separation Efficiency ◽  
Low Cost ◽  
Water Repellency ◽  
Dip Coating ◽  
Absorption Capacity ◽  
Photochromic Properties ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

Superhydrophobic sponge as potential absorbing material for oil/water separation is attracting great attention recently. However, there are still some challenges to feasibly fabricate superhydrophobic sponge with large scale and low cost. Herein, a novel photochromic superhydrophobic melamine sponge (PDMS-SP sponge) is fabricated by facilely dip-coating and thermocuring of hydroxyl-terminated polydimethylsiloxanes mixed with photochromic spiropyran. FT-IR, EDS, and XPS results confirm the successful coating of PDMS-SP upon melamine sponge. The resultant sponge not only possesses excellent water repellency with a contact angle of 154.5° and oil-water separation efficiency with an oil absorption capacity of 48–116 folds of itself weight, but also shows photochromic phenomenon between colorless and purple when it is successively exposed to UV irradiation and visible light.

scholarly journals PP/TiO2 Melt-Blown Membranes for Oil/Water Separation and Photocatalysis: Manufacturing Techniques and Property Evaluations

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 775 ◽  
Author(s):  
Fei Sun ◽  
Ting-Ting Li ◽  
Haitao Ren ◽  
Qian Jiang ◽  
Hao-Kai Peng ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Decomposition Temperature ◽  
Particle Dispersion ◽  
Tio2 Content ◽  
Scanning Calorimetry ◽  
Water Separation ◽  
Photocatalytic Effect ◽  
Oil Water Separation ◽  
Oil Water ◽  
Manufacturing Techniques

This study aims to produce polypropylene (PP)/titanium dioxide (TiO2) melt-blown membranes for oil/water separation and photocatalysis. PP and different contents of TiO2 are melt-blended to prepare master batches using a single screw extruder. The master batches are then fabricated into PP/TiO2 melt-blown membranes. The thermal properties of the master batches are analyzed using differential scanning calorimetry and thermogravimetric analysis, and their particle dispersion and melt-blown membrane morphology are evaluated by scanning electron microscopy. TiO2 loaded on melt-blown membranes is confirmed by X-ray diffraction (XRD). The oil/water separation ability of the melt-blown membranes is evaluated to examine the influence of TiO2 content. Results show that the thermal stability and photocatalytic effect of the membranes increase with TiO2 content. TiO2 shows a good dispersion in the PP membranes. After 3 wt.% TiO2 addition, crystallinity increases by 6.4%, thermal decomposition temperature increases by 25 °C compared with pure PP membranes. The resultant PP/TiO2 melt-blown membrane has a good morphology, and better hydrophobicity even in acetone solution or 6 h ultraviolet irradiation, and a high oil flux of about 15,000 L·m−2·h−1. Moreover, the membranes have stabilized oil/water separation efficiency after being repeatedly used. The proposed melt-blown membranes are suitable for mass production for separating oil from water in massively industrial dyeing wastewater.

scholarly journals Facile Fabrication of Magnetic, Durable and Superhydrophobic Cotton for Efficient Oil/Water Separation

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 442 ◽  
Author(s):  
Mingguang Yu ◽  
Qing Wang ◽  
Wenxin Yang ◽  
Yonghang Xu ◽  
Min Zhang ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Water Repellency ◽  
Cotton Fabrics ◽  
Ammonia Solution ◽  
Hot Water ◽  
Water Contact ◽  
Water Separation ◽  
Efficient Strategy ◽  
Oil Water Separation ◽  
Oil Water

In this paper, we present a facile and efficient strategy for the fabrication of magnetic, durable, and superhydrophobic cotton for oil/water separation. The superhydrophobic cotton functionalized with Fe3O4 magnetic nanoparticles was prepared via the in situ coprecipitation of Fe2+/Fe3+ ions under ammonia solution on cotton fabrics using polyvinylpyrrolidone (PVP) as a coupling agent and hydrophobic treatment with tridecafluorooctyl triethoxysilane (FAS) in sequence. The as-prepared cotton demonstrated excellent superhydrophobicity with a water contact angle of 155.6° ± 1.2° and good magnetic responsiveness. Under the control of the external magnetic field, the cotton fabrics could be easily controlled to absorb the oil from water as oil absorbents, showing high oil/water separation efficiency, even in hot water. Moreover, the cotton demonstrated remarkable mechanical durable properties, being strongly friction-resistant against sandpaper and finger wipe, while maintaining its water repellency. This study developed a novel and efficient strategy for the construction of magnetic, durable, and superhydrophobic biomass-based adsorbent for oil/water separation, which can be easily scaled up for practical oil absorption.

Scaly bionic structures constructed on a polyester fabric with anti-fouling and anti-bacterial properties for highly efficient oil–water separation

RSC Advances ◽  
2016 ◽  
Vol 6 (90) ◽  
pp. 87332-87340 ◽  
Author(s):  
Y. W. Liu ◽  
C. H. Zhang ◽  
Z. Q. Wang ◽  
X. Fu ◽  
R. Wei
Keyword(s):  
Separation Efficiency ◽  
Polyester Fabric ◽  
Water Separation ◽  
Highly Efficient ◽  
Oil Water Separation ◽  
Oil Water ◽  
Underwater Superoleophobicity

Scaly structure bionic structured on the fabric with superhydrophilicity and underwater superoleophobicity. The modified fabric showed excellent separation efficiency for various oil–water mixtures which could solve oil–water separation issue.

Investigating the effect of surface composition and morphology on oil/water separation efficiency of sponges coated with polymer nanocomposites

2018 ◽  
Vol 40 (S1) ◽  
pp. E431-E439 ◽  
Author(s):  
Mahdi Akhavan ◽  
Iman Hejazi ◽  
Javad Seyfi ◽  
Samira Ghiyasi ◽  
Seyyed Saeed Ghorashi ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Surface Composition ◽  
Separation Efficiency ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Effect Of Surface

scholarly journals Efficient Oil/Water Separation Membrane Derived from Super-Flexible and Superhydrophilic Core–Shell Organic/Inorganic Nanofibrous Architectures

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 974 ◽  
Author(s):  
Zhi Liu ◽  
Detao Qin ◽  
Jianghui Zhao ◽  
Quan Feng ◽  
Zhengtao Li ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Scale Up ◽  
Core Shell ◽  
Water Separation ◽  
Membrane Performance ◽  
Novel Approach ◽  
Separation Membrane ◽  
Oil Water Separation ◽  
Oil Water ◽  
Nanofibrous Membranes

To address the worldwide oil and water separation issue, a novel approach was inspired by natural phenomena to synthesize superhydrophilic and underwater superoleophobic organic/inorganic nanofibrous membranes via a scale up fabrication approach. The synthesized membranes possess a delicate organic core of PVDF-HFP and an inorganic shell of a CuO nanosheet structure, which endows super-flexible properties owing to the merits of PVDF-HFP backbones, and superhydrophilic functions contributed by the extremely rough surface of a CuO nanosheet anchored on flexible PVDF-HFP. Such an organic core and inorganic shell architecture not only functionalizes membrane performance in terms of antifouling, high flux, and low energy consumption, but also extends the lifespan by enhancing its mechanical strength and alkaline resistance to broaden its applicability. The resultant membrane exhibits good oil/water separation efficiency higher than 99.7%, as well as excellent anti-fouling properties for various oil/water mixtures. Considering the intrinsic structural innovation and its integrated advantages, this core–shell nanofibrous membrane is believed to be promising for oil/water separation, and this facile approach is also easy for scaled up manufacturing of functional organic/inorganic nanofibrous membranes with insightful benefits for industrial wastewater treatment, sensors, energy production, and many other related areas.

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