Flotation Cell Adapter for Forced-Gas Retrofit Without Reducer Replacement
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Solution Overview
Problem
Existing naturally-aspirated flotation cells in industries like pulp and paper recycling, wastewater treatment, and mining face challenges in upgrading to forced-air systems due to high replacement costs and the need for significant capital expenditures, with existing retrofit solutions requiring replacement of major components like reducers and motors.
Innovation Solution
A method and apparatus that convert naturally-aspirated flotation cells to forced-air cells by reusing existing components, specifically avoiding the replacement of naturally-aspirated flotation cell reducers through the use of an adapter that introduces forced gas into the system, allowing continued use of existing drive motors and reducers, thereby reducing conversion costs and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a naturally-aspirated flotation cell is completely replaced with a new forced-air flotation cell, then flotation recovery and operating efficiency are improved, but capital expenditure and conversion costs increase significantly
Solution Approach 1:
The patent recovers and reuses the existing tank and drive assembly from the naturally-aspirated flotation cell, discarding only the components that prevent forced-air operation (original air intake system). This recovering approach maintains flotation recovery while significantly reducing capital expenditure compared to complete replacement.
Solution Approach 2:
The patent introduces an intermediary forced-air injection system that connects the existing drive assembly to a new air supply mechanism. This mediator enables the transition from natural aspiration to forced-air operation without requiring complete system replacement, thus improving productivity while controlling costs.
2Adaptability or versatility
If the drive assembly is completely replaced with a new forced-air drive assembly, then forced-air flotation capability is achieved, but conversion time and labor costs increase
Solution Approach 1:
The patent segments the flotation cell into modular components (tank, drive assembly, air injection system), allowing the existing tank and drive assembly to be retained while only replacing the air delivery mechanism. This segmentation enables faster conversion by focusing changes on specific components rather than the entire system.
Solution Approach 2:
The patent designs the drive assembly to serve multiple functions: it can operate with both naturally-aspirated and forced-air configurations. This multi-functionality allows the existing drive assembly to be retained and adapted, reducing conversion time and labor costs while achieving forced-air capability.
3Quantity of substance
If existing components are reused in the conversion, then conversion costs are reduced, but system complexity increases due to integration requirements
Solution Approach 1:
The patent uses an intermediary coupling mechanism that simplifies the integration between the existing drive assembly and the new forced-air injection system. This mediator component handles the complexity of connecting different systems, allowing existing components to be reused while managing integration complexity through a standardized interface.
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 approach enables cost-effective upgrading of naturally-aspirated flotation cells to forced-air systems, reducing labor, material, and time costs while maintaining high efficiency and extending the lifespan of existing equipment, achieving up to 75% capital savings and improved maintenance accessibility.
Implementation Method 1
use higher pressure pipelines which force air through a hollow rotating drive shaft and through holes in a rotor to facilitate bubble formation within a tank
Data Source
AI summary
The disclosure relates to an adapter (200) for converting a naturally-aspirated flotation cell (10) to a forced-gas flotation cell without replacing the naturally-aspirated flotation cell reducer (21) with a specialized conversion reducer (103). The adapter (200) is designed to be located below the naturally-aspirated flotation cell reducer (21) and at a location along the drive shaft. The adapter (200) comprises an outer static casing (201) having a forced gas inlet (210); an inner rotating spanner (204) having at least one port (205) therein; sealing means (203, 224, 225, 226) provided between the static casing (201) and the spanner (204); and, a chamber (213) formed between the outer static casing (201) and the spanner (204). Related methods and apparatus incorporating the adapter (200) are further disclosed.