0000000000377021
AUTHOR
Rune Husveg
Improving Separation of Oil and Water With a Novel Coalescing Centrifugal Pump
Summary A novel centrifugal pump that increases oil-droplet sizes in produced water has been developed. This paper investigates a concept of pumping-pressure optimization, with respect to downstream separation efficiency, for the new pump. The investigation shows that the coalescing centrifugal pump always increased the separation efficiency of a downstream hydrocyclone. Furthermore, it is shown that the pumping pressure can be adjusted to maximize the improvement. Experimental results demonstrate how pumping conditions that minimize the volume fraction of droplets with a diameter smaller than the cut size of the hydrocyclone maximize the separation efficiency. Finally, it is demonstrated h…
Automatic Operation and Control of a Novel Coalescing Centrifugal Pump for Improved Oil/Water Separation
Summary In this paper we present the development and implementation of automatic operation and control for a pump/hydrocyclone produced-water-treatment system to maximize oil/water-separation efficiency. A so-called perturb-and-observe (P&O) algorithm is adapted for a novel centrifugal pump to continuously optimize the point of operation. The novel pump coalesces and increases the size of oil droplets in the produced water, resulting in a unique relationship between the coalescing effect and the point of operation, and allowing for the successful implementation of the P&O algorithm. The algorithm was implemented in two different setups, one measuring the droplet-size distribution be…
Variable Step Size P&O Algorithms for Coalescing Pump/Deoiling Hydrocyclone Produced Water Treatment System
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.
Tracking Maximum Produced Water Treatment Efficiency Using a Variable Speed Coalescing Centrifugal Pump : Doctoral Dissertation for the Degree Philosophiae Doctor (PhD) at the Faculty of Engineering and Science, Specialisation in Mechatronics
Doktorgradsavhandling Produced water is the most significant by-product of petroleum production. Even though naturally occurring, the produced water poses substantial environmental impacts if not managed correctly, and it is often associated with large volumes and high handling costs. Oil removal is one of the primary goals of produced water treatment. The efficiency of the treatment equipment is usually highly sensitive to the oil droplet's size. Generally, the larger the droplets, the better the separation. Due to the importance of large oil droplets, droplet breakup in process equipment such as pumps and valves should be kept to a minimum. Recently, a novel coalescing multistage centrifu…
Improving Separation of Oil and Water Using a Novel Coalescing Centrifugal Pump
Abstract A novel centrifugal pump, which increases oil droplet sizes in produced water, has been developed. This paper investigates a concept of pumping pressure optimization with respect to downstream separation efficiency, for the new pump. The investigation shows that the coalescing centrifugal pump always increases the separation efficiency of a downstream hydrocyclone. Furthermore, it is seen that the pumping pressure can be adjusted to maximize the improvement. Experimental results demonstrate how pumping conditions, which minimize the volume fraction of droplets with a diameter smaller than the cut size of the hydrocyclone, maximize the separation efficiency. Finally, it is exemplifi…
Investigation of Stabilization Method for Hydraulically Actuated Boom
Masteroppgave i mekatronikk - Universitetet i Agder, 2015 (Konfidensiell til/confidential until 01.07.2020)