Oil Water Separator Using Rotating Drum and Hydrophobic Membrane
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Solution Overview
Problem
Conventional methods for separating oil from water, such as filtration and coalescence, are inefficient and prone to clogging, leading to increased costs and time requirements in industrial settings, particularly in parts washing and metal processing operations, where oil-water mixtures require effective separation to prevent pollution and maintain workplace safety.
Innovation Solution
A composite fluid oil-water separator utilizing a rotating plastic or composite drum for mechanical oil removal, an automatic adjustable overflow tube for purging residual oil, and a water conveyor to enhance oil separation, exploiting the difference in specific gravity between oil and water, allowing for efficient separation of tramp oils from cutting and cleaning fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If filtration methods are used to separate oil from water, then oil removal is achieved, but the filters clog quickly requiring frequent replacement
Solution Approach 1:
The patent extracts the harmful oil component from the water-oil mixture using a hydrophobic membrane that selectively allows water to pass through while blocking oil. This extraction method prevents the clogging issue inherent in conventional filtration by removing oil through a different mechanism rather than physical entrapment.
Solution Approach 2:
The invention employs a hydrophobic porous membrane as the core separation medium. The membrane's porous structure with hydrophobic properties enables selective permeation where water molecules can pass through the pores while oil molecules are repelled, achieving continuous separation without clogging.
2Reliability
If coalescers are used to separate oil from water, then separation performance is improved, but the coalescers are very susceptible to clogging
Solution Approach 1:
The patent replaces the mechanical coalescing process with a membrane-based selective permeation system. Instead of relying on mechanical coalescing media that are prone to clogging, the invention uses a hydrophobic membrane that passively separates oil and water based on their different affinities for the membrane material, eliminating the clogging susceptibility of mechanical systems.
Solution Approach 2:
The invention changes the separation mechanism from mechanical coalescence to hydrophobic membrane filtration. By altering the separation parameter from mechanical interaction to surface chemistry-based selective permeation, the system achieves reliable separation without the clogging issues that plague coalescing systems.
3Reliability
If conventional gravity separators are used, then oil-water separation is achieved, but large surface areas are required making the tanks slow and bulky
Solution Approach 1:
The invention uses a hydrophobic porous membrane to achieve separation in a compact configuration. The membrane's high surface area to volume ratio and selective permeability enable efficient oil-water separation in a much smaller footprint compared to conventional gravity separators, eliminating the need for large tank surface areas.
Solution Approach 2:
The patent replaces gravity-based separation with membrane-based selective permeation. This substitution enables separation to occur across a thin membrane barrier rather than requiring large gravitational settling distances, dramatically reducing the equipment footprint while maintaining separation effectiveness.
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 enables efficient removal of oil from water mixtures at a rate of up to two gallons per hour, reduces maintenance and operating costs, and is scalable for various flow rates, providing a low-maintenance, easy-to-operate system that can be integrated into industrial settings, effectively addressing the inefficiencies of existing separation methods.
Implementation Method 1
exploiting the difference in specific gravity between oil and water
Implementation Method 2
rotating plastic (or composite) drum for mechanical removal
Implementation Method 3
as the mixture flows into the tube, the oil rises and the water sinks, effecting separation of the two different fluids
Implementation Method 4
the oil rises and the water sinks, effecting separation of the two different fluids
Data Source
AI summary
An oil water composite fluid separator apparatus designed for use in industrial applications in which unwanted tramp oils or other fluids, such as hydraulic oils, with specific gravity less than that of the operating fluid are required to be removed from operating fluid such as water, lubri-coolants or other liquids.