Self-Cleaning Gas-Liquid Separator for Supercritical Fluid Chromatography
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gas-liquid separators in supercritical fluid chromatography and extraction face challenges such as aerosolization, cross-contamination, and limited dynamic range, requiring complex cleaning processes and pressurization, which hinder efficient collection of solute fractions.
Innovation Solution
A self-cleaning gas-liquid separator design utilizing a porous metal or polymeric filter with a spiral channel to coalesce and separate gas and liquid phases, reducing re-aerosolization and allowing for collection near atmospheric pressure, with optional features for enhanced cleaning and fraction collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the separator is pressurized to reduce aerosol velocity, then aerosol suppression is improved, but safety risks and device complexity increase
Solution Approach 1:
The patent replaces the mechanical pressurization system with a thermal field-based solution. A heating element is applied to the separator wall to create a temperature gradient that prevents aerosol formation and promotes liquid coalescence, eliminating the need for complex pressurization mechanisms while achieving the same aerosol suppression effect
Solution Approach 2:
The patent changes the operational parameter from pressure control to temperature control. By applying heat to the separator wall, the system creates a thermal environment that reduces aerosol velocity and promotes phase separation, simplifying the overall system while maintaining effective aerosol suppression
2Manufacturing precision
If manual rinsing is performed to prevent cross-contamination, then collection precision is improved, but loss of time and productivity decrease
Solution Approach 1:
The separator is designed to be self-cleaning through controlled aerosolization of a cleaning agent. The system automatically introduces and distributes cleaning fluid through the existing aerosol generation mechanism, eliminating the need for manual rinsing operations while ensuring thorough cleaning of all internal surfaces
Solution Approach 2:
The patent implements periodic cleaning cycles where the separator alternates between normal operation and automated cleaning modes. During cleaning cycles, the aerosolization mechanism is used to distribute cleaning agent, automatically removing contaminants without requiring manual intervention between fraction collections
3Adaptability or versatility
If the separator handles wide dynamic range of flow rates, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent designs a universal separator system where the aerosolization and heating mechanisms serve multiple functions: they suppress aerosols during normal operation, enable self-cleaning between fractions, and adapt to different flow rates without requiring structural modifications. This multi-functionality achieves wide dynamic range handling while maintaining relatively simple device architecture
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 design minimizes cross-contamination, reduces manual rinsing, and enables efficient collection of solute fractions across a wide dynamic range, while mitigating safety risks associated with over-pressurization, allowing for flexible configuration in parallel or series collection setups.
Implementation Method 1
liquid aerosol droplets coalesce to larger droplets generally too large to be carried by the rapidly slowing vapor stream
Implementation Method 2
The external surface area of the filter is generally sized to be one or more orders of magnitude greater than the cross sectional area of the inlet tube delivering the gas-liquid flow stream into the filter, resulting in a proportional reduction in linear velocity of the flowstream
Implementation Method 3
drain by gravity down the wall
Data Source
AI summary
An apparatus, process, and system are disclosed that effectively provide separation of a combined gas/liquid flow stream into its separated gas and liquid factions. The invention is primarily directed to the fields of preparative supercritical fluid chromatography (SFC) and supercritical fluid extraction (SFE), but will have other utilization and applicability where phases of dramatically different density, viscosity and volumetric flow require separation.