scholarly journals Experimental Investigation on the Separation Performance for a New Oil-Water Separator

2021 ◽  
Vol 8 ◽  
Author(s):  
Min Zhan ◽  
Wanyou Yang ◽  
Fenghui Zhang ◽  
Changhua Luo ◽  
Huaxiao Wu ◽  
...  
Keyword(s):  
Water Flow ◽  
Flow Rate ◽  
Separation Efficiency ◽  
Water Flow Rate ◽  
Operating Parameter ◽  
Separation Performance ◽  
Water Separation ◽  
Split Ratio ◽  
Oil Fraction ◽  
Oil Water

To reduce the cost of oil exploitation, it is necessary to promote the development of cyclones for oil-water separation due to the increase of the water content in produced fluids. However, there are some limitations and disadvantages for the conventional separation device including bulky settling tanks and hydrocyclones. In this paper, a new axial inlet separator with two reverse flow outlets and a downstream flow outlet is introduced. In addition, an experimental system was designed and fabricated to investigate the effects of inlet flow rate, oil fraction, and a controlled split ratio on separation performance. The separator maintains high separation efficiency within the experimental range, namely water flow rate (4–7 m3/h), and oil fraction (1%–10%). Furthermore, the results show that a higher water flow rate and oil fraction will affect the separation efficiency. The change of a pressure drop in the separator was analyzed as well. Moreover, the controlled split ratio is a serious operating parameter, and a larger controlled split ratio is conducive to the separation performance.

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.

A multi-function textile with pH-induced switch wettability transition for controllable oil−water separation

2021 ◽  
pp. 004051752110569
Author(s):  
Long Feng ◽  
Yimiao Hou ◽  
Qingqing Hao ◽  
Mingxing Chen ◽  
Shuo Wang ◽  
...  
Keyword(s):  
Contact Angle ◽  
Separation Efficiency ◽  
Nonwoven Fabric ◽  
Dip Coating ◽  
Municipal Sewage ◽  
Alkaline Condition ◽  
Separation Performance ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

The deterioration of water ecology caused by the discharge of oil spill wastewater, industrial sewage, and municipal sewage has attracted wide attention worldwide. Thus, it is significant to design a simple, environmentally friendly approach to separate oil–water mixtures. In this work, three different fabrics with pH-induced wettability transition were prepared by a dip-coating process for oil and water separation. The dip-coating fabrics had the advantages of oil–water separation, photocatalytic degradation, and recycling. Polyethylene terephthalate/polyamide nonwoven fabric was used as the substrate materials of the fabric. The carboxylic acid-modified TiO2 endowed the fabric with hydrophilicity–hydrophobicity and photocatalytic properties. The Fe3O4 nanoparticles obtained by the coprecipitation method provided magnetism for the fabric, facilitating the recycling of the fabric and improving the hydrophobicity of the fabric. The fabrics coated with dipping solutions were superhydrophobic in a neutral environment and hydrophilic in an alkaline environment. Among the three coated fabrics, the fabric coated with stearic acid/TiO2-Fe3O4 (FST) had the most satisfying oil–water separation performance and durability. Under the neutral condition, the contact angle of the FST was 151° and the separation efficiency was 98%. Under the alkaline condition, the underwater oil contact angle of the FST was 150° and the separation efficiency was 95%. After 15 cycles, the oil–water separation rate of the FST was still higher than 90%. Due to the presence of TiO2, the coated fabric had an exceptional performance in the photodegradation of organic pollutants (69.9%). In addition, the fabrics can be quickly recovered due to magnetism.

Effect of Bias Flow on Flotation Efficiency in a Packed Column

2013 ◽  
Vol 781-784 ◽  
pp. 2797-2802
Author(s):  
Jun Ji ◽  
Yi Gang Ding ◽  
Lei Liu ◽  
Li Wei Wang ◽  
Yuan Xin Wu
Keyword(s):  
Water Flow ◽  
Flow Rate ◽  
Separation Efficiency ◽  
Water Flow Rate ◽  
Packed Column ◽  
Wash Water ◽  
Reverse Flotation ◽  
Flotation Process ◽  
Flotation Column ◽  
Bias Flow

Bias flow is an important parameter in a flotation process of packed column. An experiment related to P2O5 recovery of phosphate rock was designed to study the effect of bias flow on the flotation separation efficiency by a direct-reverse flotation circuit of packed flotation column. The results have showed that the recovery of P2O5 is high during the combination of the direct-reverse flotation circuit. The grade and yield of P2O5 can reach to 32.77% and 82.64% respectively, under the condition of the range of-0.005~0 cms-1 of bias flow, 0.013~0.020 cms-1 of the wash water flow rate in the direct flotation column, and the range of 0.006~0.009 cms-1 of bias flow, 0.027~0.035 cms-1 of wash water flow rate in the reverse column.

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.

scholarly journals Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Gels ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 66
Author(s):  
Zhongjie Zhu ◽  
Lei Jiang ◽  
Jia Liu ◽  
Sirui He ◽  
Wei Shao
Keyword(s):  
Separation Efficiency ◽  
Dimensional Structure ◽  
Separation Performance ◽  
High Porosity ◽  
Water Mixture ◽  
Water Separation ◽  
Highly Efficient ◽  
Oil Water Separation ◽  
Gravity Driven ◽  
Oil Water

A superhydrophobic fluorinated silica functionalized chitosan (F-CS) aerogel is constructed and fabricated by a simple and sustainable method in this study in order to achieve highly efficient gravity-driven oil/water separation performance. The fluorinated silica functionalization invests the pristine hydrophilic chitosan (CS) aerogel with promising superhydrophobicity with a water contact angle of 151.9°. This novel F-CS aerogel possesses three-dimensional structure with high porosity as well as good chemical stability and mechanical compression property. Moreover, it also shows striking self-cleaning performance and great oil adsorption capacity. Most importantly, the as-prepared aerogels exhibits fast and efficient separation of oil/water mixture by the gravity driven process with high separation efficiency. These great performances render the prepared F-CS aerogel a good candidate for oil/water separation in practical industrial application.

scholarly journals Designing and studying operational parameters of hydrocyclone for oil – water separation

2019 ◽  
Vol 26 (4) ◽  
pp. 41-51
Author(s):  
Maryam Ibrahim Chasib ◽  
Raghad Fareed Qasim
Keyword(s):  
Pressure Drop ◽  
Flow Rate ◽  
Separation Efficiency ◽  
Design Procedure ◽  
Operating Conditions ◽  
Optimum Operating ◽  
Operational Parameters ◽  
Water Separation ◽  
Water Emulsion ◽  
Split Ratio

This research presents the design procedure for liquid – liquid hydrocyclone to separate kerosene – water emulsion. It studies the effects of varying feed flow rate (6, 8, 10, and 12 l/min), inlet kerosene concentration (250, 500, 750, 1000, and 1250 ppm) , and split ratio (0.1, 0.3, 0.5, 0.7, and 0.9) on the outcomes; separation efficiency and pressure drop ratio . This study used factorial experimental design assisted with Minitab program to obtain the optimum operating conditions. It was shown that inlet concentration of 250 ppm, 12 l/min inlet flow rate, and 0.9 split ratio gave 94.78 % as maximum separation efficiency and 0.895 as minimum pressure drop ratio.

Cellulose Nanospheres Coated Polylactic Acid Nonwoven Membranes for Recyclable Use in Oil/Water Separation

2021 ◽  
Author(s):  
Jiexiu Wen ◽  
Qihao Yu ◽  
Chaofan Cui ◽  
Juanjuan Su ◽  
Jian Han
Keyword(s):  
Polylactic Acid ◽  
Separation Efficiency ◽  
Separation Performance ◽  
Hydroxyl Groups ◽  
Oily Wastewater ◽  
Water Separation ◽  
Secondary Pollution ◽  
Oil Water Separation ◽  
Repeated Use ◽  
Oil Water

Abstract Oily wastewater has always been an environmental issue that we are concerned about and committed to managing. Although the superwetting membranes have been extensively studied and widely used in oil/water separation, the abundant discarded membranes are still headaches due to their non-degradable nature. In this work, all-around green, as well as superhydrophilic polylactic acid (PLA) nonwoven membrane, is designed by coating cellulose nanospheres (CNCs) with the aid of polydopamine (PDA). Abundant hydroxyl groups and hierarchical rough structure synergistically contribute to the superhydrophilicity and excellent oil/water separation performance of the resultant CNCs/PDA/PLA nonwoven membrane. Interestingly, the oil/water separation efficiency can be maintained above 98% after 100 times of repeated use. With outstanding durability, and easy controllability, the CNCs/PDA/PLA nonwoven membrane may provide effective solutions to simultaneously manage the oily wastewater and secondary pollution of the used membrane itself.

In-Line Testing of Novel Filter Media for Oil-Water Mixtures

2019 ◽  
Author(s):  
Anisha Mule ◽  
Ramin Dabirian ◽  
Srinivas Swaroop Kolla ◽  
Ram Mohan ◽  
Ovadia Shoham
Keyword(s):  
Pressure Drop ◽  
Flow Rate ◽  
Oil Content ◽  
Separation Efficiency ◽  
Permeate Flux ◽  
Filter Media ◽  
Water Separation ◽  
Fibrous Filter Media ◽  
Oil Water ◽  
High Separation

Abstract A novel non-fibrous filter media is evaluated for in-line oil-water separation. Outside-in-crossflow configuration incorporating the filter media is utilized in order to test the filter. All experiments are conducted with a hydrophilic-olephobic filter for water-continuous flow with low oil concentrations. The collected experimental data include permeate flow rate and purity as well as pressure drop. Values of permeate flow rate and pressure drop are averaged over the duration of the experiments, which is about 5 minutes, constituting the “initial average” of the permeate flow rate and the corresponding pressure drop. Totally twelve experimental runs are conducted for mixture velocities of 0.038 m/s, 0.055 m/s and 0.066 m/s, and oil concentrations of 0.6%, 0.83%, 1.1%, 7.9% and 9.1%. Permeate samples are analyzed for oil content, demonstrating a high separation efficiency of 98 ± 2%. The permeate flux across the filter cartridge ranges between 0.0739 (L/h)/cm2 to 0.216 (L/h)/cm2 owing to the low pressure drop across to filter. Oil concentration in to permeate water samples shows consistently increasing trend with an increase in inlet oil content, while maintaining high separation efficiency for all runs. The pressure drop across the membrane under flowing conditions ranges from 0.35 psid to 0.6 psid for flow rates between 0.1 L/min and 0.29 L/min, respectively. Also the data confirm that the filter membrane breakthrough pressure is 0.35 psid.

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 Effect of Water Flow on Underwater Wet Welded A36 Steel

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 682
Author(s):  
Eko Surojo ◽  
Aziz Harya Gumilang ◽  
Triyono Triyono ◽  
Aditya Rio Prabowo ◽  
Eko Prasetya Budiana ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Flow ◽  
Flow Rate ◽  
Water Flow Rate ◽  
Physical And Mechanical Properties ◽  
Shielded Metal Arc Welding ◽  
Effect Of Water ◽  
Bending Effect ◽  
Metal Arc Welding ◽  
A36 Steel

Underwater wet welding (UWW) combined with the shielded metal arc welding (SMAW) method has proven to be an effective way of permanently joining metals that can be performed in water. This research was conducted to determine the effect of water flow rate on the physical and mechanical properties (tensile, hardness, toughness, and bending effect) of underwater welded bead on A36 steel plate. The control variables used were a welding speed of 4 mm/s, a current of 120 A, electrode E7018 with a diameter of 4 mm, and freshwater. The results show that variations in water flow affected defects, microstructure, and mechanical properties of underwater welds. These defects include spatter, porosity, and undercut, which occur in all underwater welding results. The presence of flow and an increased flow rate causes differences in the microstructure, increased porosity on the weld metal, and undercut on the UWW specimen. An increase in water flow rate causes the acicular ferrite microstructure to appear greater, and the heat-affected zone (HAZ) will form finer grains. The best mechanical properties are achieved by welding with the highest flow rate, with a tensile strength of 534.1 MPa, 3.6% elongation, a Vickers microhardness in the HAZ area of 424 HV, and an impact strength of 1.47 J/mm2.

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