Multi-Stage Fluidized-Bed Flotation Separator for Recovery Efficiency

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Solution Overview

Problem

Conventional flotation separators face limitations in recovery efficiency due to their exclusive operation as tanks-in-series, leading to reduced recovery rates and increased energy consumption, as they fail to effectively exploit the principles of plug flow and independent adjustment of process stages.

Innovation Solution

A multi-stage fluidized-bed flotation separator system with independently operable processing compartments, each creating a fluidized bed with teeter water and air bubbles, allowing for targeted separation and increased particle retention time, which enhances recovery by mimicking a plug-flow reactor and allowing for independent adjustment of teetering conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional flotation separators operate as tanks-in-series, then the system structure is simple, but recovery efficiency decreases

Engineering Contradiction:

Improverecovery efficiencyVSAvoidsystem structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The flotation separator is divided into multiple independently operable processing compartments arranged in series. Each compartment can be independently controlled with separate air bubble injection and teeter water flow, allowing optimized separation at each stage while maintaining overall system simplicity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each processing compartment is equipped with independently adjustable teeter water flow rates and air bubble injection, enabling dynamic optimization of separation conditions in each compartment to maximize recovery efficiency while maintaining manageable system complexity

Inventive Principle:

Principle #15Dynamics

2Productivity

If multiple in-series flotation separators are used to improve recovery, then recovery efficiency increases, but footprint and energy consumption increase

Engineering Contradiction:

Improverecovery rateVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by stationary object

Solution Approach 1:

Multiple flotation separation stages are merged into a single integrated unit with multiple processing compartments. The shared structure, common feed introduction, and unified overflow/underflow collection reduce the total footprint and energy consumption compared to operating separate flotation separators in series, while maintaining high recovery rates through independent compartment control

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If multiple in-series flotation separators are used to improve recovery, then recovery efficiency increases, but system footprint increases

Engineering Contradiction:

Improverecovery rateVSAvoidfootprint

Core Design Contradiction:

ProductivityVSArea of stationary object

Solution Approach 1:

Multiple flotation separation stages are combined within a single compact unit, sharing common structural elements, feed introduction systems, and product collection areas. This integration dramatically reduces the footprint compared to multiple separate flotation separators while maintaining the recovery benefits of multi-stage processing through independent compartment operation

Inventive Principle:

Principle #5Merging (Combining)

4Productivity

If conventional flotation separators are used, then the system is easy to operate, but separation efficiency is reduced

Engineering Contradiction:

Improveseparation efficiencyVSAvoidoperational complexity

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The system is segmented into standardized processing compartments that can be independently controlled. Each compartment has independent teeter water flow and air bubble injection controls, allowing operators to optimize each stage separately while maintaining overall ease of operation through modular, consistent design across all compartments

Inventive Principle:

Principle #1Segmentation

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 achieves improved recovery rates comparable to multiple in-series flotation separators within a single unit, reducing footprint and energy requirements while maintaining equivalent separation efficiency, by allowing hydrophobic particles to attach to air bubbles and hydrophilic particles to pass through the fluidized bed.

Implementation Method 1

suspended solids that forms a fluidized bed (also known as teeter-bed or hindered-bed) that is created by the upward movement of the teeter water through the suspended solids

Methodology Applied

Scientific EffectFluidization: Fluidisation

Implementation Method 2

hydrophobic particles attach to the air bubbles and report to the upper portion of the separator system above the fluidized bed

Methodology Applied

Scientific EffectHydrophobic interaction: Hydrophobe

Data Source

PatentUS10994284B2Multi-stage fluidized-bed flotation separator

Publication Date: 2021.05.04 ERIEZ MANUFACTURING CO

AI summary

A system for concentrating particulate mixtures of hydrophobic and hydrophilic material in a fluid medium is presented. The system comprises a separation chamber comprising three or more processing compartments in series. Each processing compartment comprises a manifold for the introduction of teeter water that comprises a mixture of water and air bubbles, suspended solids that form a fluidized bed that is created by the upward movement of the teeter water through the suspended solids; and each processing compartment is independently operable. An overflow launder is located above the separation chamber and a dewatering compartment is located beneath the separation chamber.