Gas Liquid Separator with Sloping Bottom for Chromatography
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional gas-liquid separators in chromatography systems, particularly in supercritical fluid chromatography, face challenges in efficiently separating gases from liquids due to re-entrainment of liquids back into the gas stream, leading to low liquid recovery and distortion of chromatographic peaks, especially at high flow rates.
Innovation Solution
A gas-liquid separator design featuring a chamber with a sloping bottom surface and a channel to guide the liquid to the outlet, combined with a gas outlet at the top, effectively decelerates the fluid mixture, allowing for gravity-driven separation and reducing dispersion, thereby enhancing liquid recovery and peak shape integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional gas-liquid separators are used in supercritical fluid chromatography, then gas and liquid can be separated, but liquid re-entrainment occurs leading to low liquid recovery and distorted chromatographic peaks
Solution Approach 1:
The separator chamber is divided into distinct functional zones: an expansion region where the fluid mixture decelerates, a separation region where gas and liquid separate, and a gravity flow region with a sloping bottom surface that directs liquid to the outlet. This segmentation prevents liquid re-entrainment by creating clear spatial boundaries between different separation mechanisms.
Solution Approach 2:
The sloping bottom surface creates a gravity-driven flow path that maintains liquid movement toward the outlet without requiring additional pressure or mechanical intervention. The geometry ensures liquid follows a continuous path to the outlet, preventing pooling and re-entrainment while maintaining equipotential flow conditions.
2Productivity
If high flow rates are used in chromatography, then productivity increases, but liquid dispersion increases and peak shape deteriorates
Solution Approach 1:
The separator utilizes a three-dimensional chamber design with a sloping bottom surface that creates a gravity-driven flow path in the vertical dimension. This dimensional approach allows liquid to be directed to the outlet through gravitational potential energy rather than relying solely on horizontal flow velocity, thereby maintaining peak shape integrity even at high flow rates.
3Reliability
If the chamber cross-section increases from inlet to outlet, then fluid deceleration and separation efficiency improve, but device volume increases
Solution Approach 1:
The chamber features an asymmetric cross-sectional geometry that increases from inlet to outlet, creating an expansion region that decelerates the fluid mixture. This asymmetric design optimizes the balance between separation efficiency and volume by concentrating the expansion in specific regions rather than uniformly increasing dimensions throughout the chamber.
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 proposed design significantly improves liquid recovery and maintains chromatographic peak integrity by ensuring a continuous path for the liquid to the outlet, achieving up to 96% liquid recovery and reducing analyte dispersion in high flow rate applications.
Implementation Method 1
The chamber wall includes a surface at a bottom of the chamber that slopes downward from the inlet end to the outlet end to conduct a gravity flow of a liquid to the outlet end
Implementation Method 2
a chamber having a chamber wall, an inlet end, an outlet end and a chamber cross-section that increases with increasing distance from the inlet end along an axial direction
Data Source
Figure 1~2
Figure 3A~3B
Figure 3C
AI summary
Examples of gas liquid separators (50) include a chamber (52), a fluid mixture inlet (56), a gas outlet (62) and a liquid outlet (64). The fluid mixture inlet and the gas and liquid outlets are in fluid communication with the chamber. A fluid mixture received at the fluid mixture inlet diffuses inside the chamber and is separated into a liquid and a gas. The separated liquid is gravity-fed to the liquid outlet. In one embodiment the fluid mixture is conducted through piping (68), including a 90° elbow, to the fluid mixture inlet (56). Advantageously, the elbow can reduce the velocity of the fluid mixture before reaching the fluid mixture inlet (56). The gas liquid separators have reduced dispersion and increased liquid recovery in comparison to conventional gas liquid separators used for chromatographic separations. The reduced dispersion yields an improvement in the shape of chromatographic peaks.