Separator Emulsion Volume Control for Precise Demulsifier Dosing
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Solution Overview
Problem
In hydrocarbon recovery operations, the formation of stable emulsions in oil/water mixtures during processing leads to inefficiencies and oil loss, as existing methods require excessive demulsifying agents due to unknown emulsion volumes, necessitating a need for automated control of chemical treatment to separate oil from water effectively.
Innovation Solution
A multi-phase liquid separation control system comprising an internal liquid mixture volume detector, a chemical treatment system, and a controller that receives signals from the detector to determine the volume of the mixture and adjust operating parameters for optimal separation, using a combination of detectors and a model to predict the response to chemical treatment and adjust process conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If demulsifying agents are added to the oil/water mixture, then emulsion separation is improved, but the cost increases due to excessive chemical usage
Solution Approach 1:
The patent employs a level detector to monitor the emulsion layer volume in real-time and provides feedback to a controller. The controller automatically adjusts the dosage of demulsifying agents based on the detected emulsion volume, ensuring optimal chemical usage without excess. This closed-loop feedback system resolves the contradiction by enabling reliable emulsion separation while precisely controlling chemical consumption.
Solution Approach 2:
The system enables self-regulating chemical dosing where the detector and controller work autonomously to monitor emulsion levels and adjust demulsifier dosage without manual intervention. The system serves itself by automatically adapting the chemical treatment to the actual emulsion conditions, eliminating the need for excessive chemical addition while maintaining effective separation.
2Reliability
If manual chemical treatment is used, then emulsion control is achieved, but productivity decreases due to unknown emulsion volumes requiring excess chemical
Solution Approach 1:
The automatic control system uses real-time feedback from the level detector to the controller, enabling dynamic adjustment of demulsifying agent dosage. This eliminates the need for manual estimation and excess chemical addition, thereby improving productivity while maintaining reliable emulsion control. The system responds automatically to changing emulsion conditions, optimizing the separation process efficiency.
Solution Approach 2:
The patent replaces manual mechanical control with an automated electromechanical system comprising a level detector, controller, and automated dosing mechanism. This substitution eliminates human intervention in monitoring and chemical dosing, improving productivity through continuous automated operation while maintaining precise emulsion control based on actual volume measurements.
3Reliability
If excess demulsifying agents are used, then emulsion separation is ensured, but loss of oil increases due to rejection of emulsion
Solution Approach 1:
The feedback-controlled dosing system monitors emulsion volume and adjusts chemical addition precisely to match actual needs. This prevents over-dosing that would cause excessive emulsion formation requiring rejection, thereby reducing oil loss while maintaining reliable separation. The system adds just enough demulsifier to break the emulsion without creating excessive volume that would need to be discarded.
Solution Approach 2:
The system dynamically changes the dosage parameter of demulsifying agents based on real-time emulsion volume detection. By adjusting the chemical dosage parameter to match actual emulsion conditions rather than using fixed excess amounts, the system achieves reliable emulsion separation while minimizing oil loss through precise parameter control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system enables precise control of chemical treatment, reducing emulsion volume and improving separation efficiency, thereby minimizing oil loss and optimizing the separation process by automatically adjusting parameters based on real-time mixture volume data.
Implementation Method 1
detectors disposed inside the separator to detect a volume of a multi-phase liquid mixture
Implementation Method 2
detectors disposed inside the separator to detect a volume of a multi-phase liquid mixture
Implementation Method 3
oil typically separates from water spontaneously by gravity
Implementation Method 4
add demulsifying agents to the oil/water mixture
Data Source
AI summary
A method of operating a liquid separator includes detecting a volume of a multi-phase liquid mixture inside the operating liquid separator using one or more detectors; determining, from a signal of the one or more detectors, a volume of the multi-phase liquid mixture; determining an amount of a chemical treatment, or other operating parameter, based on the volume of the multi-phase liquid mixture; and applying the amount of chemical treatment, or other operating parameter, to the separator.