Development of a centrifugal in-line separator for oil-water flows

Slot, J.J.

doi:10.3990/1.9789036535427

Cited by 9 publications

(6 citation statements)

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“…A gas-liquid inline swirl separator (ISS) was chosen as representative of the multiphase flow field in this paper due to its industrial relevance, since separation technologies are fundamental to many branches of the process industry: oil and gas [37], nuclear power plants [38], wastewater treatment [39], etc. Moreover, the separator represents a wide range of multiphase processes, since it covers both the typical behavior of a mixture (while the phases are still mixed in the beginning of the separator) and the strong change in the distribution of fluids that occurs in some processes (during the separation).…”

Section: A Tomography-controlled Inline Swirl Separatormentioning

confidence: 99%

Towards Tomography-Based Real-Time Control of Multiphase Flows: A Proof of Concept in Inline Fluid Separation

Garcia

Sattar

Atmani

et al. 2022

Sensors

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The performance of multiphase flow processes is often determined by the distribution of phases inside the equipment. However, controllers in the field are typically implemented based on flow variables, which are simpler to measure, but indirectly connected to performance (e.g., pressure). Tomography has been used in the study of the distribution of phases of multiphase flows for decades, but only recently, the temporal resolution of the technique was sufficient for real-time reconstructions of the flow. Due to the strong connection between the performance and distribution of phases, it is expected that the introduction of tomography to the real-time control of multiphase flows will lead to substantial improvements in the system performance in relation to the current controllers in the field. This paper uses a gas–liquid inline swirl separator to analyze the possibilities and limitations of tomography-based real-time control of multiphase flow processes. Experiments were performed in the separator using a wire-mesh sensor (WMS) and a high-speed camera to show that multiphase flows have two components in their dynamics: one intrinsic to its nonlinear physics, occurring independent of external process disturbances, and one due to process disturbances (e.g., changes in the flow rates of the installation). Moreover, it is shown that the intrinsic dynamics propagate from upstream to inside the separator and can be used in predictive and feedforward control strategies. In addition to the WMS experiments, a proportional–integral feedback controller based on electrical resistance tomography (ERT) was implemented in the separator, with successful results in relation to the control of the distribution of phases and impact on the performance of the process: the capture of gas was increased from 76% to 93% of the total gas with the tomography-based controller. The results obtained with the inline swirl separator are extended in the perspective of the tomography-based control of quasi-1D multiphase flows.

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Section: A Tomography-controlled Inline Swirl Separatormentioning

confidence: 99%

Towards Tomography-Based Real-Time Control of Multiphase Flows: A Proof of Concept in Inline Fluid Separation

Garcia

Sattar

Atmani

et al. 2022

Sensors

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“…. These concepts are based partly on a fundamental design that was already developed in previous works of Slot , van Campen , Star and Knöbel . The core element of inline fluid separation is a swirl element inside a pipe that converts pressure into fluid angular momentum via its curved blades.…”

Section: Concepts Of a Controlled Inline Fluid Separatormentioning

confidence: 99%

“…x j (9) where U i is the filtered velocity and t sgs is the subgrid scale stress tensor related to the Smagorinsky coefficient C S through a subgrid eddy viscosity. The dispersed flow is described using the Lagrangian tracking method [32] developed in JADIM.…”

Section: Computational Fluid Dynamicsmentioning

confidence: 99%

Controlled Inline Fluid Separation Based on Smart Process Tomography Sensors

Sahovic

Atmani

Sattar

et al. 2020

Chemie Ingenieur Technik

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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.Today's mechanical fluid separators in industry are mostly operated without any control to maintain efficient separation for varying inlet conditions. Controlling inline fluid separators, on the other hand, is challenging since the process is very fast and measurements in the multiphase stream are difficult as conventional sensors typically fail here. With recent improvement of process tomography sensors and increased processing power of smart computers, such sensors can now be potentially used in inline fluid separation. Concepts for tomography-controlled inline fluid separation were developed, comprising electrical tomography and wire-mesh sensors, fast and massive data processing and appropriate process control strategy. Solutions and ideas presented in this paper base on process models derived from theoretical investigation, numerical simulations and analysis of experimental data.

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“…The main disadvantage of the filtration process is periodicity, as the filter elements are gradually contaminated and need to be replaced. Therefore, so far, an urgent task for cleaning up major oil spills is developing compact devices for separating oil-water emulsions with high efficiency [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Separation of Oil-Water Emulsion in Laboratory Setup with U-Shaped Elements

et al. 2021

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This study considers the problem of separation of oil-water emulsion in the case of oil spills. The standard methods of separation of the emulsion were presented. A unit with U-shaped separation elements has been developed. The device's operating principle was described, in which the separation of the oil-water emulsion occurs mainly due to the action of centrifugal forces arising from flow motion between the U-shaped elements and gravitational forces. The laboratory setup used for experiments was presented. The aim was to study the separation process of oil-water emulsion in a setup under varying initial temperature and initial density of the emulsion. The results showed that the device can separate the oil-water emulsion into light and heavy phases with an efficiency of at least 93.4% at a velocity of 1.39–2.15 m/s in narrow sections between the U-shaped elements. One way of improving the separation of the oil-water emulsion is to increase the working temperature. It was found that the increased efficiency of 2.5% indicates that device applicability caused the presence and availability of heating devices. As the crude oil content in the feed increases, it is necessary to increase the number of rows of U-shaped elements or repeat the process.

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Development of a centrifugal in-line separator for oil-water flows

Cited by 9 publications

References 0 publications

Towards Tomography-Based Real-Time Control of Multiphase Flows: A Proof of Concept in Inline Fluid Separation

Towards Tomography-Based Real-Time Control of Multiphase Flows: A Proof of Concept in Inline Fluid Separation

Controlled Inline Fluid Separation Based on Smart Process Tomography Sensors

Separation of Oil-Water Emulsion in Laboratory Setup with U-Shaped Elements

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