Flowline Demulsification with Localized Heating Coils
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Solution Overview
Problem
Current methods for demulsifying emulsified water and hydrocarbon liquids in hydrocarbon processing facilities are energy-intensive and time-consuming, particularly challenging in low-temperature conditions, leading to bottlenecks in processing plants.
Innovation Solution
A flowline demulsification system with heating coils strategically positioned within a pipe to apply targeted heat to the interfacial layer between immiscible fluids, partially demulsifying the mixture before it reaches a separator, reducing energy consumption and processing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional demulsification methods are used, then complete separation of water and hydrocarbon liquids is achieved, but energy consumption increases and processing time increases
Solution Approach 1:
The heating coils are positioned to apply heat to the interfacial layer before the fluid reaches the separator, preliminarily demulsifying the emulsion in the flowline. This preliminary action reduces the energy and time required for complete separation in the separator, as the emulsion is already partially broken down when it enters the separation stage.
Solution Approach 2:
Instead of heating the entire fluid volume uniformly, the heating coils are strategically positioned to apply heat locally to the interfacial layer where water and hydrocarbon liquids meet. This localized heating approach concentrates thermal energy where it is most needed for demulsification, reducing overall energy consumption while maintaining effective separation.
2Reliability
If heating is applied to the entire fluid volume, then demulsification is achieved, but energy consumption increases
Solution Approach 1:
The heating coils are positioned to apply heat locally to the interfacial layer where water and hydrocarbon liquids meet, rather than heating the entire fluid volume. This localized heating concentrates thermal energy where it is most needed for demulsification, reducing overall energy consumption while maintaining effective separation.
Solution Approach 2:
The interfacial layer acts as an intermediary target for heat application. By focusing heating on this specific layer where the two immiscible fluids meet, the system achieves demulsification at the critical interface without wasting energy heating the bulk fluids, thereby improving energy efficiency while maintaining demulsification effectiveness.
3Productivity
If demulsification is performed in the separator, then complete separation is achieved, but processing time increases creating bottlenecks
Solution Approach 1:
The heating coils are positioned to apply heat to the interfacial layer before the fluid reaches the separator, preliminarily demulsifying the emulsion in the flowline. This preliminary action reduces the time required for complete separation in the separator, as the emulsion is already partially broken down when it enters the separation stage, thereby reducing processing bottlenecks.
Solution Approach 2:
By performing initial demulsification in the flowline through targeted heating, the system skips or rushes through the emulsion breakdown phase before separation, allowing the separator to focus only on the final separation step. This reduces the overall processing time and eliminates bottlenecks in the separation workflow.
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
The system effectively reduces energy consumption by up to 20% compared to traditional methods, facilitating faster and more efficient separation of water and hydrocarbon liquids, even in low-temperature conditions, by applying heat directly to the interfacial layer within the flowline.
Implementation Method 1
The heating coils generate heat
Data Source
AI summary
An elongate, horizontally level, pipe includes a circumferential wall. The pipe flows, within the circumferential wall, process fluid that includes a first fluid and a second fluid immiscible with the first fluid. The first fluid and the second fluid are separated by an interfacial layer. Heating coils are disposed within the pipe. Each heating coil passes through an interior region of the pipe between the circumferential wall at a respective height from a bottom of the pipe. The heating coils generate heat. A controller is connected to the heating coils. The controller triggers at least one of the heating coils that is nearest to a location of the interfacial layer within the interior region to apply heat to the interfacial layer. The heat is sufficient to at least partially demulsify the interfacial layer.