Electrified Pipeline Lining for Hydrocarbon Fouling Control
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Solution Overview
Problem
Hydrocarbon fouling in pipelines during oil transport poses significant operational challenges due to the accumulation of materials like asphaltenes, waxes, and hydrates, and existing mitigation techniques are either environmentally unfriendly or costly, while transporting high viscosity oils requires excessive pumping power.
Innovation Solution
A pipeline system with a dielectric layer and an electrode mesh that applies an electrical potential to attract water from a hydrocarbon-water mixture, forming a water buffer layer that prevents hydrocarbon fouling and reduces pumping power by creating a lubricating effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical inhibitors are used to prevent hydrocarbon fouling, then fouling mitigation is achieved, but environmental friendliness deteriorates
Solution Approach 1:
The patent replaces chemical inhibition methods with an electrical field-based mechanism. An electrode mesh applies an electrical potential that attracts water molecules to form a buffer layer on the pipeline surface, preventing hydrocarbon contact through physical electrostatic forces rather than chemical additives.
Solution Approach 2:
The patent introduces an intermediary water buffer layer between the hydrocarbon flow and the pipeline surface. This water layer, attracted by electrical forces, acts as a physical barrier that prevents asphaltenes and other hydrocarbons from adhering to the pipeline, eliminating the need for chemical inhibitors.
2Reliability
If mechanical pigging is used to remove fouling, then fouling removal is achieved, but operational complexity and cost increase
Solution Approach 1:
The patent applies preliminary protective action by maintaining a continuous water buffer layer on the pipeline surface through electrical attraction. This preventive measure stops hydrocarbon fouling before it accumulates to levels requiring mechanical removal, eliminating the need for periodic pigging operations.
Solution Approach 2:
The electrical field system continuously maintains itself by automatically attracting water from the flowing mixture to replenish the buffer layer. The system is self-regulating and requires no external intervention for fouling removal, unlike mechanical pigging which demands scheduled maintenance operations.
3Use of energy by moving object
If heating pipelines is used to reduce viscosity, then pumping power is reduced, but energy consumption and cost increase
Solution Approach 1:
The patent introduces a water buffer layer as an intermediary lubricating medium between the viscous hydrocarbon flow and the pipeline surface. This water layer, maintained by electrical attraction, provides lubrication that reduces friction and pumping power requirements without requiring thermal energy input.
Solution Approach 2:
The patent utilizes the hydraulic properties of water to reduce friction. By creating a continuous water film on the pipeline surface through electrical field attraction, the system exploits the low viscosity and lubricating characteristics of water to minimize energy losses during hydrocarbon transport.
4Use of energy by moving object
If copious amounts of diluents are added to reduce viscosity, then pumping power is reduced, but substance loss and environmental impact increase
Solution Approach 1:
The patent uses a water buffer layer as a lubricating intermediary that reduces viscosity effects at the pipeline surface without requiring bulk addition of diluents to the hydrocarbon stream. The water layer is maintained in situ through electrical attraction, preventing the need for copious diluent addition and associated substance losses.
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
Effectively eliminates hydrocarbon fouling and significantly reduces the pumping power required for transporting viscous oils by creating a water-rich buffer layer that acts as a lubricant, lowering pressure drops and maintaining surface wetness.
Implementation Method 1
a potential difference is applied across the dielectric layer established by applying an electrical potential to the electrode mesh and applying an electrical potential to the pipeline
Implementation Method 2
the water buffer layer comprises water electrically attracted from the water-hydrocarbon mixture by applying the potential difference across the dielectric layer
Implementation Method 3
the water buffer layer is located between the electrode mesh and the water-hydrocarbon mixture thereby eliminating hydrocarbon fouling on an inner surface of the pipeline
Data Source
AI summary
A method for eliminating hydrocarbon fouling and reducing pumping power during hydrocarbon transportation. A dielectric layer covers the inner surface of a pipeline for transporting a water-hydrocarbon mixture. A proximity electrode is immersed in the water-hydrocarbon mixture, and an electrical voltage is applied across the dielectric layer. A buffer layer of water is formed on the dielectric layer since water is electrically attracted from the water-hydrocarbon mixture. This water layer, located between the dielectric layer and the water-hydrocarbon mixture, eliminates hydrocarbon fouling on the inner surface of the pipeline or any other internal surface that needs fouling protection. Alternatively, the dielectric layer covers an outer surface of the pipeline and is covered by an external conducting layer. Applying a potential difference between the proximity electrode and the external conducting layer still forms a water buffer layer between the inner surface and the water-hydrocarbon mixture, which eliminates hydrocarbon fouling.