Rotating Separator for Four-Phase Separation and Power Recovery
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Solution Overview
Problem
Existing separation methods for multi-phase fluids (gas, Liquid A, Liquid B, and solids) are inefficient, requiring large equipment, high energy consumption, and generating foam that interferes with the separation process, and existing rotating separators are not effective for four-phase separation without producing significant waste and disrupting the hydrostatic pressure balance.
Innovation Solution
A compact rotating separator apparatus that separates gas, liquids of different densities, and solids in distinct zones using a fluid jet, with longitudinal vanes to constrain liquid layers, weirs to control hydrostatic pressure, and a separate zone for solids removal, allowing for self-regulation and power recovery from the fluid jet, enabling complete separation with minimal waste and turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large gravity separation tank is used for multi-phase separation, then separation capacity is improved, but equipment weight and deck space increase significantly
Solution Approach 1:
The invention changes the separation mechanism from gravity-based to centrifugal force-based by rotating the separator at high speeds. This parameter change allows the same separation capacity to be achieved in a much smaller, lighter apparatus, directly resolving the contradiction between separation capacity and equipment weight
Solution Approach 2:
The invention introduces dynamic rotation to the separator apparatus, transforming it from a static gravity tank to a dynamic centrifugal separator. The rotating motion creates centrifugal forces that enable efficient multi-phase separation in a compact configuration, reducing both weight and size while maintaining high productivity
2Manufacturing precision
If high speed centrifuges are used for secondary liquid separation, then separation efficiency is improved, but power consumption increases significantly
Solution Approach 1:
The invention segments the separation process into distinct zones within the rotating separator: a first zone for gas-liquid separation and a second zone for liquid-liquid separation. This segmentation allows each phase to be separated at optimized locations, achieving high separation efficiency without requiring multiple high-speed centrifuges, thus reducing overall power consumption
Solution Approach 2:
The rotating separator performs multiple separation functions (gas-liquid and liquid-liquid separation) within a single apparatus. This multi-functionality eliminates the need for separate secondary separation equipment, reducing both power consumption and system complexity while maintaining high separation efficiency
3Ease of operation
If liquid scoops are immersed directly in separated liquid layers, then liquid removal is simplified, but turbulence and disturbance to hydrostatic pressure balance occur
Solution Approach 1:
The invention introduces an intermediary mechanism (the rotating separator wall with controlled openings) between the liquid scoop and the separated liquid layers. This intermediary allows liquid removal while maintaining the hydrostatic pressure balance, as the separator wall controls the interaction between the scoop and liquid layers, preventing direct turbulence and disturbance
4Productivity
If a large opening is provided to pass largest particles in waste flow, then solids discharge capability is improved, but a large waste stream is produced with environmental consequences
Solution Approach 1:
The invention applies local quality by providing different opening sizes at different locations on the separator wall. Smaller openings are strategically placed in zones where they can effectively discharge solids while minimizing waste stream volume, optimizing both solids discharge capability and environmental performance
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 solution achieves efficient, compact, and self-regulating separation of four phases with reduced equipment weight and deck space, minimizing waste and emissions, while generating power from the process energy, thus reducing operational costs and environmental impact.
Implementation Method 1
separating gas from the stream at a first zone within the rotating separator apparatus, separating liquids from the stream into separate layers of different density at a second zone within the rotating separator apparatus
Implementation Method 2
involving steps as follows: separating gas from the stream at a first zone within the rotating separator apparatus, separating liquids from the stream into separate layers of different density at a second zone within the rotating separator apparatus
Data Source
AI summary
A compact rotating separator apparatus to which a fluid stream containing gas, two liquids of different density, and solids is supplied via nozzles or exhaust from a process component; and which employs high centrifugal forces to produce pure streams of the gas, each of the liquids, and a waste stream containing the solids. The energy in the fluid stream is converted to shaft power in the rotating separator apparatus and can be used to generate power. Oil, gas, water and solids from a production well can be directly separated into the constituent streams while producing useful power.