Oily Water Treatment Using Ceramic Membrane in Presence of Swirling Flow Induced by a Tangential Inlet via CFD

2014 ◽  
Vol 348 ◽  
pp. 51-57 ◽  
Author(s):  
Tássia Vieira Mota ◽  
Helton Gomes Alves ◽  
Severino Rodrigues Farias Neto ◽  
Antônio Gilson Barbosa de Lima
Keyword(s):  
Ceramic Membrane ◽  
Volume Fraction ◽  
Ceramic Membranes ◽  
Particle Model ◽  
Water Separation ◽  
Significant Difference ◽  
Oil Water Separation ◽  
Oily Water ◽  
Oil Water ◽  
Tangential Inlet

In recent years, attention has been given to the processes controlling the emission of oily effluents and their environmental impact. Many industrial processes generate large volumes of water contaminated with oil, called oily waters. The oily water must be treated before its discard in order to meet the criteria established by environmental agencies (for example in Brazil, 20 mg/L). In present days, the process of separating oil/water with ceramic membranes has attracted the attention of many researchers [1,2]. In this sense, the aim of this study is to evaluate the influence of the tangential inlet shape in the oil/water separation via ceramic membranes. We use a mathematical multiphase flow model to describe the oil-water separation, based on the particle model. Here oil is the dispersed phase while water the continuous phase. To model the turbulence effect we use the RNGk-εmodel. All simulations were carried out using the Ansys CFX ® commercial code. Results of streamlines and velocity, pressure and volume fraction of phase fields are present and analyzed. The numerical results indicate that no significant difference when using a circular or rectangular pipe with the same cross-sectional area.

scholarly journals Gravity-Driven Separation of Oil/Water Mixture by Porous Ceramic Membranes with Desired Surface Wettability

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 457
Author(s):  
Chunlei Ren ◽  
Wufeng Chen ◽  
Chusheng Chen ◽  
Louis Winnubst ◽  
Lifeng Yan
Keyword(s):  
Porous Ceramic ◽  
Ceramic Membranes ◽  
Separation Performance ◽  
Water Mixture ◽  
Alumina Membrane ◽  
Water Separation ◽  
Alumina Membranes ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

Porous Al2O3 membranes were prepared through a phase-inversion tape casting/sintering method. The alumina membranes were embedded with finger-like pores perpendicular to the membrane surface. Bare alumina membranes are naturally hydrophilic and underwater oleophobic, while fluoroalkylsilane (FAS)-grafted membranes are hydrophobic and oleophilic. The coupling of FAS molecules on alumina surfaces was confirmed by Thermogravimetric Analysis and X-ray Photoelectron Spectroscopy measurements. The hydrophobic membranes exhibited desired thermal stability and were super durable when exposed to air. Both membranes can be used for gravity-driven oil/water separation, which is highly cost-effective. The as-calculated separation efficiency (R) was above 99% for the FAS-grafted alumina membrane. Due to the excellent oil/water separation performance and good chemical stability, the porous ceramic membranes display potential for practical applications.

Electrospun fibers for oil–water separation

RSC Advances ◽  
2016 ◽  
Vol 6 (16) ◽  
pp. 12868-12884 ◽  
Author(s):  
Wenjing Ma ◽  
Qilu Zhang ◽  
Dawei Hua ◽  
Ranhua Xiong ◽  
Juntao Zhao ◽  
...  
Keyword(s):  
Oil Pollution ◽  
Electrospun Fibers ◽  
Water Separation ◽  
New Techniques ◽  
Oil Water Separation ◽  
Oily Water ◽  
Oil Water

The increasing worldwide oil pollution intensifies the needs for new techniques of separation of oil from oily water.

Numerical Simulation of Oil- and Water-Sands Multiphase Flow in Gathered Pipes

2012 ◽  
Vol 557-559 ◽  
pp. 2294-2298
Author(s):  
Yi Xin Pan ◽  
Hong Bing Zhang ◽  
Rong Hua Xie ◽  
Xing Bin Liu
Keyword(s):  
Multiphase Flow ◽  
Volume Fraction ◽  
Low Flow ◽  
Governing Equations ◽  
Water Separation ◽  
Nonlinear Growth ◽  
Sediment Volume ◽  
Oil Water Separation ◽  
Oil Water ◽  
Logging Tool

In the oil mining process, we need to hold flow characteristic for oil- and water-sands, with low-middle volume fraction of the particles in gathered pipes, in order to design logging tool and build interpretation methods for the producing profile. We built governing equations and boundary conditions for the oil- and water-sands based on the three-D k-ε-kp model. The simulation results indicate the sand volume fraction affects the sedimentation quantity and rate obviously. Multiphase flow in the gathered pipe is compartmentalized three sections: oil-water separation section, transition section and full mixing section from entrance to exit and multiphase flow meter need to place in the full mixing section. Sediment mainly settles to the bottom of gathered pipes umbrella in the condition of low flow rate and content of sediment, which has little impact on the internal instrument, but need to clear timely. With the increase of sediment volume and reduce of flow race, the time which multiphase flow in the gathered pipe reached a steady state was nonlinear growth.

SLOP TANK DESIGN FOR IMPROVED LOAD-ON-TOP

1975 ◽  
Vol 1975 (1) ◽  
pp. 195-200
Author(s):  
Robert J. Fiocco ◽  
Vincent W. Ridley
Keyword(s):  
Large Scale ◽  
Focal Point ◽  
Operational Flexibility ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oily Water ◽  
Oil Water ◽  
Tank Design ◽  
Oil Tankers ◽  
Capacity Structure

ABSTRACT Slop tanks are the focal point of the Load-On-Top system used on crude oil tankers to prevent pollution of the sea. Design of these tanks and their operating procedures strongly affect the degree of oil-water separation achieved. This paper presents the results of an investigation undertaken to define designs and procedures for improving separation and minimizing oil discharge to sea. The program was funded in part by the U.S. Maritime Administration. Based on tanker experience and laboratory tests with tank models, guidelines on capacity, structure, inlets, outlets, system design, and wastewater handling, procedures were developed. The guidelines aim at assuring successful Load-On-Top operations by (1) providing tanker operational flexibility for handling oily water, (2) minimizing the degree of oil-water mixing, (3) avoiding re-dispersion of separated oil during feeding and discharging operations, and (4) eliminating the possibility of accidental oil contamination. This investigation provides a basis for future large-scale or shipboard studies to improve the performance of slop tanks on existing tankers as well as on future tankers.

Feasibility Study on Membrane Technology for Ship Oil-Water Separation in China

2015 ◽  
Vol 1092-1093 ◽  
pp. 856-861
Author(s):  
Ou Chen Cai ◽  
Jun Feng Chen ◽  
Wei Zhang
Keyword(s):  
Membrane Filtration ◽  
Membrane Technology ◽  
Preliminary Treatment ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Concentration ◽  
Oily Water ◽  
Oil Water ◽  
Oily Water Treatment ◽  
Filtration Device

The case study of membrane technology applied in oily water treatment in petrochemical industry demonstrated that it is also technically feasible in ship oil-water separation in China. Based on the analysis of the membrane technological parameter selection, a practical ship oil-water separator has been designed, which consists of two-stage devices, a preliminary treatment device and a membrane filtration device for advanced treatment. The pore size and the hydrophilicity of the membrane should be decided by the influent oil content; the operating temperature could be the influent temperature; the TMP should be controlled at 0.1-0.2 MPa; the influent oil concentration and flux should be modified by the preliminary treatment device so they are appropriate for the membrane filtration device.

Analytical Examination of Oil/Water Separation by Coalescence

1973 ◽  
Vol 1973 (1) ◽  
pp. 403-408 ◽  
Author(s):  
Stanley M. Finger ◽  
T. S. Yu
Keyword(s):  
Separation System ◽  
Oil Viscosity ◽  
Water Separation ◽  
Physical Separation ◽  
Solids Concentration ◽  
Water Feed ◽  
Oil Water Separation ◽  
Oil Concentration ◽  
Oily Water ◽  
Oil Water

ABSTRACT The physical separation process of coalescence has been studied analytically under controlled conditions in regard to the separation of oil from oily water mixtures. Variations in coalescer performance were studied as a function of the oily water feed to a three stage prototype separation system of which coalescence was the final stage. The data were analyzed statistically and it was shown that increasing suspended solids concentration, increasing oil viscosity, and increasing oil concentration decreased coalescer element lifetime, however, above a certain level increasing oil concentration had no effect. Variations in the total flow rate in the range of one to four gallons per minute per square foot did not have a significant effect on coalescer element life. Under all conditions studied, the effluent water contained less than 15 parts per million oil, only ten percent of the samples analyzed contained more than this amount. The results indicate that coalescence is useful as a final polishing step in an oil/water separation system.

scholarly journals Fabrication of magnesium bentonite hollow fibre ceramic membrane for oil-water separation

2020 ◽  
Vol 13 (7) ◽  
pp. 5996-6008
Author(s):  
Yusuf Olabode Raji ◽  
Mohd Hafiz Dzarfan Othman ◽  
Nik Abdul Hadi Sapiaa Md Nordin ◽  
Zhong ShengTai ◽  
Jamilu Usman ◽  
...  
Keyword(s):  
Ceramic Membrane ◽  
Hollow Fibre ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water
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