Automatic Operation and Control of a Novel Coalescing Centrifugal Pump for Improved Oil/Water Separation

Husveg, Rune; Husveg, Trygve; Teeffelen, Niels van; Ottestad, Morten; Hansen, Michael Rygaard

doi:10.2118/195591-pa

Cited by 3 publications

(11 citation statements)

References 1 publication

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“…The investigated control routines determine this setpoint. The coalescing pump used in this investigation is designed according to the principles of Typhonix AS and is the same pump as used by Husveg et al (2016Husveg et al ( , 2018Husveg et al ( , 2019. It is emphasized that the resulting coalescing effect is partly a design parameter and partly process related, and therefore varies from one pump application to another.…”

Section: Considered Systemmentioning

confidence: 99%

“…Based on the findings of Husveg et al (2016Husveg et al ( , 2018, Husveg et al (2019) presented a control routine which continuously optimized the droplet growth according to the downstream separation efficiency. By repeatedly changing the pumping pressure in steps of a fixed size, the routine tracked the optimal point of operation, i.e., the combination of pumping pressure and flow rate, without affecting the overall process plant.…”

Section: Introductionmentioning

confidence: 99%

“…Downstream control valves were used to compensate for the pressure changes. Figure 1 shows the setup considered by Husveg et al (2019). The figure shows a sketched produced water treatment facility containing the coalescing pump, a hydrocyclone, an oil-in-water analyzer, and downstream control valves.…”

Section: Introductionmentioning

confidence: 99%

“…The figure shows a sketched produced water treatment facility containing the coalescing pump, a hydrocyclone, an oil-in-water analyzer, and downstream control valves. In addition to developing the control routine, Husveg et al (2019) investigated three different analyzer locations. Placing the oil-in-water analyzer in the downstream position (as shown in the figure) was found to be the most robust approach.…”

Section: Introductionmentioning

confidence: 99%

“…In this position, the analyzer measured the concentration of oil exiting the hydrocyclone underflow. This paper extends the control routine developed by Husveg et al (2019) by introducing a variable step size to reduce the convergence time and steady-state oscillations. Three alternative algorithms are developed, studied, and discussed based on simulations and experimental testing.…”

Section: Introductionmentioning

confidence: 99%

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Variable Step Size P&O Algorithms for Coalescing Pump/Deoiling Hydrocyclone Produced Water Treatment System

Husveg¹,

Husveg²,

Teeffelen³

et al. 2020

MIC

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This paper presents three variable step size P&O algorithms for optimizing the separation efficiency of a coalescing pump/deoiling hydrocyclone produced water treatment system. By continuously adjusting the pumping pressure, and subsequently the coalescing effect, the algorithms are used to minimize the oil concentration downstream the hydrocyclone. Due to the variable step size, the algorithms react rapidly to changes in the upstream produced water characteristics, at the same time as they reduce (or eliminate) steady-state oscillations. Based on both simulation and experimental testing, the study discusses advantages and disadvantages of the algorithms.

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Section: Considered Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Variable Step Size P&O Algorithms for Coalescing Pump/Deoiling Hydrocyclone Produced Water Treatment System

Husveg¹,

Husveg²,

Teeffelen³

et al. 2020

MIC

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Janus Membranes with Asymmetric Wettability Applied in Oil/Water Emulsion Separations

Zhang

Sun

Guo

et al. 2021

Advanced Sustainable Systems

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but these separation methods have the disadvantages of low separation efficiency, high energy consumption, complicated operation, and so on. [8] In order to solve these problems, a variety of original oil-water separation methods emerged, which usually separate oil/water mixtures by filtration and absorption. The materials for separating oil/water mixtures by filtration principle include meshes, [9,10] membranes, [11,12] filters, [13,14] film, [15,16] and so on; the materials for separating oil/water mixtures by absorption are porous materials, [17,18] powders/particles, [19,20] gels, [21,22] nanocomposites, [23,24] and so on. [3] The oil/water mixture can be divided into three categories according to the diameter size: free oil: the diameter of droplet is greater than 150 µm; dispersed oil: the diameter of droplet is less than 150 µm and greater than 20 µm; emulsified oil: the diameter of droplet is less than 20 µm. [25][26][27][28][29][30] Among them, emulsions consisting of micro-/nanoscale dispersed droplets within a continuous phase are the most difficult to separate, and the general oil/water separation method cannot effectively separate them. [31][32][33][34][35] Traditional separation methods of oil/water emulsion include thermal/chemical demulsification separation, electrochemical demulsification, centrifugation, etc. [36] However, these separation methods not only have complex operation, low separation efficiency, but also may cause secondary pollution. [4] The separation of oil/water emulsion also adopts the principle of filtration and absorption. [3] When oil/water emulsions are separated by absorption, materials with a 3D structure are often used to separate them, for example, Chen et al. [37] prepared 3D superhydrophobic foams by in situ pretreated by noncovalent surface decoration of plant polyphenol-glutaraldehyde cross-linkage that were pretreated by noncovalent surface decoration of plant polyphenolglutaraldehyde cross-linkage. Although this separation method is effective and does not clog the membrane, it cannot be reused for many times, which increases the cost. When the oil/water emulsion is separated through filtration, demulsification is usually used. Demulsification refers to the reduction of emulsion stability, resulting in immiscible phase separation, including chemical, biological, and physical treatment methods, which are commonly used in membrane separation demulsification methods including size sieving effect, charge-screening effect, With frequent oil spill accidents and the large amount of oily wastewater produced in various industrial and domestic processes, the separation of emulsified oil/water mixtures has become an important topic in environmental protection. Janus membranes with asymmetric wettability stand out among many separation materials for their switchable separation, high separation efficiency, low energy consumption, good repeatability, and durability. In recent years, Janus membranes have developed rapidly, but their separation principles and advantages and disadvan...

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Oil–Water Separation using Synthetic Trees

Umashankar¹,

Kota²,

Boreyko³

2023

Langmuir

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Existing oil−water filtration techniques require gravity or a pump as the driving force for separation. Here, we demonstrate transpiration-powered oil−water filtration using a synthetic tree, which operates pumplessly and against gravity. From top to bottom, our synthetic tree was composed of: a nanoporous "leaf" to generate suction via evaporation, a vertical array of glass tubes serving as the tree's xylem conduits, and filters attached to the tube inlets to act as the oil-excluding roots. When placing the tree in an oil emulsion bath, filtrate samples were measured to be 97−98% pure water using gravimetry and refractometry. The spontaneous oil−water separation offered by synthetic trees could be useful for applications such as oil spill cleanup, wastewater purification, and oil extraction.

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Automatic Operation and Control of a Novel Coalescing Centrifugal Pump for Improved Oil/Water Separation

Cited by 3 publications

References 1 publication

Variable Step Size P&O Algorithms for Coalescing Pump/Deoiling Hydrocyclone Produced Water Treatment System

Variable Step Size P&O Algorithms for Coalescing Pump/Deoiling Hydrocyclone Produced Water Treatment System

Janus Membranes with Asymmetric Wettability Applied in Oil/Water Emulsion Separations

Oil–Water Separation using Synthetic Trees

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