Feedwell Plenum for Inclined Plate Separator Uniform Distribution
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Solution Overview
Problem
Existing inclined plate separators face challenges in uniformly distributing influent fluid among separation passages, particularly when processing oil sand slurries with large lumps, leading to inefficiencies and potential plugging issues.
Innovation Solution
A feedwell design featuring a plenum with upward-facing deflector surfaces and internally inclined fins that distribute influent fluid uniformly across multiple separation passages, optimizing flow distribution through a semi-elliptical path arrangement and fin extensions to enhance hydraulic behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an orifice plate with large openings is used to prevent plugging by large lumps, then plugging is avoided, but the ability to effectively influence hydraulic behavior and achieve uniform distribution is lost
Solution Approach 1:
The feedwell is segmented into multiple zones using vertical baffles that divide the inlet flow into separate streams. Each baffle creates a distinct flow path that directs slurry to specific inclined plate assemblies, ensuring uniform distribution while maintaining openings large enough to prevent plugging by coarse oil sand particles
Solution Approach 2:
Different regions of the feedwell are designed with locally optimized features: upward-facing deflectors at the inlet create initial flow distribution, vertical baffles in intermediate zones direct flow to specific areas, and the geometry of each section is tailored to achieve uniform hydraulic loading across all inclined plate assemblies while accommodating large particle sizes
2Productivity
If multiple inlet lines are used to achieve uniform distribution among separation passages, then uniform distribution is improved, but device complexity and practicality deteriorate
Solution Approach 1:
Multiple flow distribution functions are merged into a single integrated feedwell structure. The combination of upward-facing deflectors, vertical baffles, and strategically positioned inlet openings works together as one unified system to achieve uniform distribution across all separation passages, eliminating the need for multiple separate inlet lines and complex control mechanisms
Solution Approach 2:
The feedwell structure performs multiple functions simultaneously: it distributes flow uniformly, prevents plugging with large particles, directs flow to specific inclined plate assemblies, and maintains hydraulic balance across all separation passages, all within a single compact component rather than requiring multiple specialized devices
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 feedwell design ensures a more uniform distribution of influent fluid, improving the separation efficiency and preventing plugging, even with large lumps in the slurry, thereby enhancing the overall performance of inclined plate separators in bitumen extraction processes.
Implementation Method 1
a plenum with upward-facing deflector surfaces and internally inclined fins that distribute influent fluid uniformly across multiple separation passages
Implementation Method 2
internally inclined fins that distribute influent fluid uniformly across multiple separation passages, optimizing flow distribution through a semi-elliptical path arrangement
Implementation Method 3
The oil sand slurry is retained in the PSV under quiescent conditions for a prescribed retention period. During this period, aerated bitumen rises and forms a froth layer
Implementation Method 4
aerated bitumen rises and forms a froth layer, which overflows the top lip of the vessel... Sand grains sink to the conical bottom of the vessel
Data Source
AI summary
A feedwell is provided for an inclined plate separator having a separation chamber containing parallel plates defining separation passages. The feedwell includes a plenum defining a plenum chamber external to the separation chamber, an upward-facing deflector surface in the plenum chamber, an inlet for discharging influent fluid onto a receiving region of the deflector surface, and an outlet for discharging the influent fluid out of the plenum and transversely into the separation chamber. The feedwell also includes parallel fins. The fins define between them plenum passages that extend from a fin end to outlet. The fin ends are disposed between the outlet and the receiving region, and are arranged in a horizontal semi-elliptical path defining a center that horizontally coincides with the receiving region.