Reverse Flow Settler Turning Vanes Turbulence Reduction
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Solution Overview
Problem
Current reverse flow settler apparatuses face challenges in efficiently separating liquid-liquid dispersions of relatively light and heavy phases due to turbulence and recirculation issues, which affect the separation efficiency and maintenance requirements.
Innovation Solution
The apparatus features a vessel with a settling section, underflow and overflow launders, a pre-coalescence channel, a feed distribution channel with turning vanes that reverse flow direction, and a flow distribution arrangement with specific geometric configurations to minimize turbulence and enhance separation, including acute angle variations and flow attenuation spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the flow velocity is reduced to enable phase separation and settling, then separation efficiency is improved, but the apparatus requires larger dimensions to maintain sufficiently long flow paths
Solution Approach 1:
The patent implements reverse flow settling where the outlet is positioned at the inlet end and the inlet is at the outlet end, creating a counter-current flow pattern. This inversion allows the heavy phase to settle and move against the light phase flow, achieving effective separation in a compact configuration rather than requiring a long unidirectional flow path
Solution Approach 2:
The patent introduces vertical dimension utilization through launders positioned at different heights (overflow launder at top, underflow launder at bottom) and employs inclined settling surfaces that convert horizontal flow path requirements into vertical separation, thereby achieving phase separation without proportionally increasing horizontal footprint
2Device complexity
If mixing equipment is located contiguously on one side of the separator installation, then space is saved, but maintenance operations become more difficult
Solution Approach 1:
The patent divides the apparatus into functionally independent modules: the separator vessel, mixing equipment, and launders are designed as separate accessible units. This segmentation allows maintenance personnel to access and service mixing equipment without disrupting the entire installation, resolving the contradiction between compact layout and maintenance accessibility
3Productivity
If turbulence is increased to enhance mixing, then contact between phases is improved, but separation efficiency deteriorates due to recirculation and re-mixing
Solution Approach 1:
The patent clearly segments the apparatus into distinct mixing and settling zones. The mixing section provides vigorous agitation for phase contact, while the settling section maintains quiescent conditions for separation. This spatial segmentation prevents turbulence from the mixing zone from interfering with the settling zone, allowing both high mixing efficiency and high separation efficiency to coexist
Solution Approach 2:
The patent employs flow distributors and baffles as intermediary elements between the mixing and settling zones. These intermediaries smoothly transition the flow from turbulent mixing conditions to calm settling conditions, preventing direct carryover of turbulence and recirculation that would otherwise degrade separation efficiency
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 configuration significantly reduces turbulence, improves separation efficiency, and simplifies maintenance by minimizing recirculation and turbulence, leading to enhanced performance and operational efficiency in separating liquid-liquid dispersions.
Implementation Method 1
the turning vanes adapted to generally reverse a flow direction of the flow within the feed distribution channel to produce a reversed flow direction
Implementation Method 2
a reverse flow apparatus for separating liquid-liquid dispersions of relatively light and heavy phases
Implementation Method 3
separating liquid-liquid dispersions of relatively light and heavy phases
Implementation Method 4
an overflow launder connected to the settling section and fluidly communicating with the settling section at a second height, the second height exceeding the first height
Data Source
AI summary
A reverse flow settling apparatus.