Performance of a Novel Rotating Gas-Liquid Separator

2010 ◽  
Vol 132 (3) ◽  
Author(s):  
G. P. Willems ◽  
J. P. Kroes ◽  
M. Golombok ◽  
B. P. M. van Esch ◽  
H. P. van Kemenade ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Collection Efficiency ◽  
Separation Process ◽  
Major Influence ◽  
Descriptive Model ◽  
Capital Costs ◽  
Fine Droplet ◽  
Phase Separator ◽  
Scale Design ◽  
Liquid Separator

A novel gas separation process makes use of a rotating phase separator to separate micron-sized droplets from a gas stream. Based on an industrial scale design, a water/air separator is constructed and tested. The first experiment concerns the drainage of large fractions of separated liquid. During operation, drainage is observed via windows and a descriptive model is formulated. Because of the major influence on overall separation efficiency, liquid drainage is a key issue in the separator design. The second experiment comprises a droplet collection efficiency measurement using micron-sized droplets dispersed within the airstream. The separation efficiency of fine droplet removal is measured. This is an important factor in reducing capital costs.

scholarly journals MODELING AND SIMULATION OF A HORIZONTAL THREE-PHASE SEPARATOR: INFLUENCE OF PHYSICOCHEMICAL PROPERTIES OF OIL

2021 ◽  
Vol 14 (04) ◽  
pp. 205-220
Author(s):  
A. J. G. Carvalho ◽  
D. C. Galindo ◽  
M. S. C. Tenório ◽  
J. L. G. Marinho
Keyword(s):  
Fluid Dynamics ◽  
Oil And Gas ◽  
Separation Efficiency ◽  
Fluid Dynamic ◽  
Oil Quality ◽  
Separation Process ◽  
Standard Case ◽  
Three Phase ◽  
Oil Density ◽  
Phase Separator

Fluids produced from oil reservoirs typically contain oil, natural gas, water, sediments, in varying amounts, and contaminating gases. Considering that economic interest usually targets mostly oil and gas, primary processing is used to separate water/oil/gas, in addition to treating these phases. Therefore, the well stream should be processed as soon as possible after reaching the surface. Separator vessels are among the main equipment used at surface production facilities, being responsible for the separation of the produced phases. This work focuses on studying the fluid dynamic behavior in a horizontal three-phase separator. To accomplish this goal, we used the computer fluid dynamics software ANSYS CFX. First, we performed a detailed analysis of a “Standard Case” to understand in detail the entire separation process within the vessel. The results show the three phases through the simulation time, analyses of the separation efficiency, different fluids flow lines, pressure gradient inside the vessel, and effect of the diverter baffle. It also considers a variation of fluid flow at the inlet of the separator. These analyses include pictures of all cases studied. Afterwards, some parameters of the standard case were altered to evaluate its influence on fluid dynamics behavior and the functioning of the separator vessel. At last, we analyzed the influences of oil density and viscosity on the separation. The oil quality affects the primary separation directly, as the oil density and viscosity increase, for example, increases the drag between the fluids and decreases the rate of sedimentation, which stickles the separation process difficult. Two out of the three cases generated satisfactory results. The simulation with the heaviest oil presented the worse results.

scholarly journals Feasibility Study on Downhole Gas–Liquid Separator Design and Experiment Based on the Phase Isolation Method

2021 ◽  
Vol 11 (21) ◽  
pp. 10496
Author(s):  
Yuntong Yang ◽  
Zhaoyu Jiang ◽  
Lianfu Han ◽  
Wancun Liu ◽  
Xingbin Liu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Gas Phase ◽  
Separation Efficiency ◽  
Dynamic Test ◽  
Phase Flow ◽  
Total Flow ◽  
Total Flow Rate ◽  
Two Phase ◽  
Oil Gas ◽  
Liquid Separator

As oil exploitation enters its middle and late stages, formation pressure drops, and crude oil degases. In production profile logging, the presence of the gas phase will affect the initial oil–water two-phase flowmeter’s flow measurement results. In order to eliminate gas-phase interference and reduce measurement costs, we designed a downhole gas–liquid separator (DGLS) suitable for low flow, high water holdup, and high gas holdup. We based it on the phase isolation method. Using a combination of numerical simulation and fluid dynamic measurement experiments, we studied DGLS separation efficiency separately in the two cases of gas–water two-phase flow and oil–gas–water three-phase flow. Comparative analysis of the numerical simulation calculation and dynamic test results showed that: the VOF model constructed based on k−ε the equation is nearly identical to the dynamic test, and can be used to analyze DGLS separation efficiency; the numerical simulation results of the gas–water two-phase flow show that when the total flow rate is below 20 m3/d, the separation efficiency surpasses 90%. The oil–gas–water three-phase’s numerical simulation results show that the oil phase influences separation efficiency. When the total flow rate is 20 m3/d–50 m3/d and gas holdup is low, the DGLS’s separation efficiency can exceed 90%. Our experimental study on fluid dynamics measurement shows that the DGLS’s applicable range is when the gas mass is 0 m3/d~15 m3/d, and the water holdup range is 50%~100%. The research presented in this article can provide a theoretical basis for the development and design of DGLSs.

An effective separation process of arsenic, lead, and zinc from high arsenic-containing copper smelting ashes by alkali leaching followed by sulfide precipitation

2020 ◽  
Vol 38 (11) ◽  
pp. 1214-1221
Author(s):  
Yuhui Zhang ◽  
Xiaoyan Feng ◽  
Bingjie Jin
Keyword(s):  
Separation Efficiency ◽  
Separation Process ◽  
Copper Smelting ◽  
Solid Ratio ◽  
Effective Separation ◽  
Lead And Zinc ◽  
Valuable Metals ◽  
Alkali Leaching ◽  
Sulfide Precipitation ◽  
High Arsenic

Separation of arsenic and valuable metals (Pb, Zn, Cu, Bi, Sn, In, Ag, Sb, etc.) is a core problem for effective utilization of high arsenic-containing copper smelting ashes (HACSA). This study developed an effective separation process of arsenic, lead, and zinc from HACSA via alkali leaching followed by sulfide precipitation. The separation behaviors and optimum conditions for alkali leaching of arsenic and sulfide precipitation of lead and zinc were established respectively as follows: NaOH concentration 3.81 M; temperature 80°C; time 90 minutes; liquid-to-solid ratio 4:1; agitation speed 450 revolutions/minute (r/min) and 2.0 times of theoretical quantity of sodium sulfide (Na2S); temperature 70°C; and time 60 minutes. The results indicated that the leaching rates of As, Pb, and Zn were 92.4%, 36.9% and 13.4%, respectively. More than 99% of lead and zinc were precipitated from the alkali leachate. The scanning electron microscopy/energy dispersive X-ray spectroscopy study confirmed that arsenic was dissolved from HACSA into the alkali leachate. Furthermore, lead and zinc were precipitated as sulfides from the alkali leachate. The proposed process was a good technique for separation of arsenic and enrichment of valuable metals for further centralized treatment separately. It provided high separation efficiency of arsenic and valuable metals, as well as low environmental pollution.

scholarly journals Numerical Simulation on Flow Field of Oilfield Three-Phase Separator

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Yong-tu Liang ◽  
Sheng-qiu Zhao ◽  
Xia-xue Jiang ◽  
Xian-qi Jia ◽  
Wang Li
Keyword(s):  
Flow Field ◽  
Water Content ◽  
Production Management ◽  
Separation Efficiency ◽  
Internal Flow ◽  
Accuracy Requirement ◽  
Operation Conditions ◽  
Three Phase ◽  
Phase Separator ◽  
The Impact

The conventional measurement method can no longer guarantee the accuracy requirement after the oilfield development entering high water cut stage, due to the water content and gas phase in the flow. In order to overcome the impact of measurement deviation the oilfield production management, the flow field of three-phase separator is studied numerically in this paper using Fluent 6.3.26. Taking into consideration the production situation of PetroChina Huabei Oilfield and the characteristics of three-phase separator, the effect of internal flow status as well as other factors such as varying flow rate, gas fraction, and water content on the separation efficiency is analyzed. The results show that the separation efficiencies under all operation conditions are larger than 95%, which satisfy the accuracy requirement and also provide the theoretical foundation for the application of three-phase separators at oilfields.

scholarly journals Investigation on separation performance of vane-type gas-liquid tube separator

2020 ◽  
Vol 26 (3) ◽  
pp. 227-236 ◽  
Author(s):  
Jun Niu ◽  
Shuo Liu ◽  
Jing-Yu Xu
Keyword(s):  
Numerical Simulation ◽  
Flow Rate ◽  
Electrical Resistance ◽  
Phase Distribution ◽  
Separation Efficiency ◽  
Separation Performance ◽  
Multiphase Model ◽  
Electrical Resistance Tomography ◽  
Mixture Density ◽  
Liquid Separator

In this work, gas phase distribution characteristic and separation performance of a new vane-type gas-liquid separator were carefully investigated using electrical resistance tomography and numerical simulation. The diameter of the separator was 100 mm and the flow rate ranges from 12.0 to 23.0 m3/h. The gas flow rate ranges from 1.2 to 4.0 m3/h. In the experiment, electrical resistance tomography was applied to test section void fraction distribution. Coriolis mass flow meter was applied to obtain separation efficiency by testing separator exits mixture density. In the numerical simulation, full Eulerian multiphase model, together with RNG k-? turbulent model and dispersed phase zero equation models were applied. Results show that the vane-type gas-liquid separator's performance is influenced by gas core size. The separator performs well in all the cases, considering separation efficiency is over 85%, and achieves nearly 100% through adjustment of split ratio. All these findings are beneficial for vane-type gas-liquid separator design and optimization.

scholarly journals Investigation of the effect of several parameters on the applicability of magnetic separation method

2021 ◽  
pp. 69-73
Author(s):  
Tariq Al-Azab ◽  
Jamil Haddad ◽  
Fadi Alfaqs
Keyword(s):  
Magnetic Separation ◽  
Centrifugal Force ◽  
Magnetic Force ◽  
Separation Efficiency ◽  
Industrial Applications ◽  
Separation Process ◽  
Silica Sand ◽  
Sand Particle ◽  
Roll Speed ◽  
Magnetic Separator

Purpose. This research investigates the separation process performed by a magnetic separator. The magnetic separation process is used to isolate ferrous materials from those which are not. Hence, a prototype of a dry magnetic separator is designed. It should be said that this study defines the effect of different parameters (roll speed, magnetic force, and mass of silica sand particle) on separation efficiency. Methodology. The influence of several parameters of the magnetic separator such as magnetic force, centrifugal force, and properties of particle (mass, shape, etc.) were studied theoretically and simulated by SolidWorks software. The optimum conditions of the magnetic separator were obtained, and several trials were performed to find the point that results in a lower effect of roller speed and a higher effect of the magnetic force on the particle in order to achieve higher separating efficiency. Findings. The results show that the centrifugal force are the most important variable influencing separating efficiency. Moreover, it was found that blade angle magnitude of (174) degree with magnetic force between (1.71E-05 to 6.3E-05 N) and roll speed from (84 to 105 rpm) are the optimum separating conditions to reach higher rate of the separating process. Originality. This is the first time that the effect of the gap distance between the magnet and the feeding particles on the magnetic force has been studied. Furthermore, the effect of centrifugal force on magnetic separator force is investigated theoretically and numerically in order to be compared for different parameters. Practical value. The new prototype design of the magnetic separating unit is promising and efficient since the parameters can be varied based on the type and characteristics of materials. It is also revealed that separating time of the materials is reduced. Hence, this type of construction of a magnetic separator is recommended for industrial applications.

scholarly journals Treating Wet Oil in Amara Oil Field Using Nanomaterial (SiO2) With Different Types of De emulsifiers

2021 ◽  
Vol 22 (1) ◽  
pp. 29-38
Author(s):  
Ayat Ragheb Alkarbalaee ◽  
Adel Sharif Hammadi ◽  
Ghassan Hamid Abdul Majeed
Keyword(s):  
Acidic Medium ◽  
Separation Efficiency ◽  
Sodium Dodecyl ◽  
Separation Process ◽  
Oil Field ◽  
Oil Refining ◽  
Ph Values ◽  
Different Types ◽  
Separation Results ◽  
High Separation

One of the most important problems in the oil production process and when its continuous flow, is emulsified oil (w/o emulsion), which in turn causes many problems, from the production line to the extended pipelines that are then transported to the oil refining process. It was observed that the nanomaterial (SiO2) supported the separation process by adding it to the emulsion sample and showed a high separation rate with the demulsifiers (RB6000) and (sebamax) where the percentage of separation was greater than (90 and 80 )%  respectively, and less than that when dealing with (Sodium dodecyl sulfate and Diethylene glycol), the percentage of separation was (60% and 50%) respectively.    The high proportion of (NaCl + distilled water) raises the probability of the separation efficiency as the separation was (88.5,79)% and (65.5, 55) %  for (RB6000, SebaMax)respectively with (SiO2) at 70 °C, while the results of separation were (77,85)% and (65,40)  for (RB6000, Seba Max) respectively with (SiO2) at 50 °C after 120 minutes, where the (w/o ratio) was (9:1) for the high separation results and (7:3) for the lower separation results, at a speed of (12000rpm), and with a salt concentration of (1500) ppm, and less of these results at lower volumetric and temporal conditions. The (NaCl) salt deals with the wall films separating the droplets and reduces their viscosity [1].    As for the pH factor, it is at the value (2 and 3) represent a stable emulsion that is difficult to separate easily, but with the passage of raising the pH away from the acidic medium and near to the basic direction, a significant increase in the separation process was observed compared with the acidic medium at lower values, after 120 minutes the separation seemed to be good efficient, reaching (60 and 70) % respectively, while at the same time the emulsion reached a more efficient separation level with a pH of (  8 and 7) equal to (80 and 87.3)  %, at 50 °C with SebaMax demulsifier in presence of (SiO2), and with the same pH values, an increase was observed in the separation with the increase in temperature to (70 °C), then it returns to be a reverse emulsifier when the value exceeds (10) to (11, 12, 13).

scholarly journals Electrostatic Separation of Copper and Glass Particles in Pretreated Automobile Shredder Residue

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 879
Author(s):  
Beom-Uk Kim ◽  
Chul-Hyun Park
Keyword(s):  
Separation Efficiency ◽  
Separation Process ◽  
Electrostatic Separation ◽  
Physical Separation ◽  
Shredder Residue ◽  
Conductive Materials ◽  
Automobile Shredder Residue ◽  
Small Glass ◽  
Increasing Demand ◽  
Optimum Separation

There is increasing demand for an efficient technique for separating automobile shredder residue (ASR) obtained from end-of-life vehicles (ELVs). A particular challenge is the physical separation of conductive materials from glass. In this study, the performance of pretreatment and induction electrostatic separation process was evaluated. The results show that a sieving/washing (combination of sieving and washing) pretreatment was the most effective for removing conductive material compared to electrostatic separation alone. The optimum separation efficiency of copper products was achieved with an applied voltage of 20 kV, a relative humidity of less than 35%, and a splitter position of 8 cm. Although the separation efficiency was slightly reduced when some small glass particles remained attached to the conductive materials, the separation efficiency of copper from the pretreated ASR dramatically increased to 83.1% grade and 90.4% recovery, compared to that of raw ASR (34.3% grade and 58.6% recovery). Based on these results, it was demonstrated that the proposed sieving/washing pretreatment was proficient at removing conductive materials from glass; thus, it has the potential to significantly improve the efficiency of electrostatic separation for ASR.

scholarly journals The Process of Separation of Husked Soybean in Oblique Airflow

2020 ◽  
Vol 12 (18) ◽  
pp. 7566
Author(s):  
Marian Panasiewicz ◽  
Jacek Mazur ◽  
Kazimierz Zawiślak ◽  
Ryszard Kulig ◽  
Grzegorz Łysiak
Keyword(s):  
Moisture Content ◽  
Separation Efficiency ◽  
Parametric Model ◽  
Separation Process ◽  
Process Efficiency ◽  
Air Velocity ◽  
Biological Origin ◽  
Size Fractions ◽  
Pneumatic Separation

The study concerns an evaluation of the effect of selected parameters on the course of horizontal pneumatic separation of unsorted husked soybean and the process efficiency. The efficiency of the process of isolating endosperm fraction from husks and other impurities was evaluated by determining the separation efficiency indicator η. It was shown that increased moisture content of the mixture results in a significant decrease in the η indicator. For example, with the 2.2% increase of moisture content (from W1 = 10.1% to W2 = 12.3%), the separation efficiency indicator decreased, on average, by 6.8%. The value of the η indicator rose with the increased velocity of the airstream, but the amount of valuable fraction that is picked up by the airstream is higher as well. It was found that, when the air velocity increased from V1 = 7.8 m·s−1 to V2 = 10.5 m·s−1 (for the moisture content W1 = 10.1% and W4 = 15.7%), the increment in the efficiency was the highest and reached 14.9–34.3%. A parametric model of the separation process of fragmented mixtures of biological origin was developed based on the analysis of the obtained results observation undertaken. This model can be used in designing and carrying out operations of separation into particular size fractions and cleaning of various feed mixtures, or in determining parameters of the movement of specific mixture components within pneumatic channels.

Numerical modeling of the degassing process of a gas-liquid mixture in hydrocyclone

2019 ◽  
Vol 5 (3) ◽  
pp. 213-229 ◽  
Author(s):  
Artem I. Varavva ◽  
Vladimir E. Vershinin ◽  
Dmitry V. Trapeznikov
Keyword(s):  
Numerical Modeling ◽  
Flow Measurement ◽  
Separation Efficiency ◽  
Liquid Mixture ◽  
Separation Process ◽  
Gas Content ◽  
Phase Flow ◽  
Flow Rates ◽  
Wide Range ◽  
Measurement Units

Centrifugal separators&nbsp;— hydrocyclones&nbsp;— are widely used in many areas of the national economy to separate mixtures of substances of different densities. Hydrocyclones can be used for phase separation in oil, water and gas flow measurement units. The flow from the well is initially a three-phase mixture. The hydrocyclone separates the gas and liquid phases at the inlet of the measuring unit, which are then transferred to separate gas and liquid measurement units. Maintaining the accuracy of the phase flow measurement when using hydrocyclones in the measuring units requires high quality separation over a wide range of flow rates and phase contents. One of the directions of forecasting the characteristics of the separation process is based on the numerical solution of the equations of hydrodynamics of multiphase flows. Modern software of computational hydrodynamics allows to solve problems of such class in three-dimensional statement and thus to estimate efficiency of work of the device and its metrological characteristics.<br> This paper studies the processes of separation of gas-liquid mixture in hydrocyclone at different volume gas content and phase flow rates. The authors present a mathematical model with indication of the main assumptions and formulate the boundary conditions of the problem. Calculations were carried out on the open platform OpenFOAM with the use of interFoam solver. The results of numerical modeling have determined the basic structures of currents in the hydrocyclone. The influence of the initial gas content on the separation efficiency at different flow rates is investigated. The main reasons for the decrease in separation efficiency at low gas content values are revealed. In addition, the influence of the guiding elements on the separation process is considered.

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