Chromatography Column Plunger Speed Control
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Solution Overview
Problem
Existing chromatography column operations are operator-dependent and lack precision in controlling plunger speed, leading to undesirable packing of the media bed, as manual control results in a single maximum speed and lacks programmable speed adjustments.
Innovation Solution
A chromatography column with a hydraulic system and a controller that allows for programmable speed settings and automatic speed adjustments based on predetermined pressures and positions, enabling the top flow adapter to move at multiple speeds and prevent manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual hydraulic control is used to operate the plunger, then the operator can control the plunger movement, but the speed control is imprecise and operator-dependent, resulting in a single maximum speed only
Solution Approach 1:
The patent replaces manual mechanical hydraulic control with an automated electronic control system that includes a controller, sensors, and programmable logic. The controller receives signals from sensors detecting plunger position and fluid levels, then automatically adjusts hydraulic valve actuation to achieve precise speed control at multiple predetermined speeds, eliminating operator-dependent manual control.
Solution Approach 2:
The system enables self-service operation where the chromatography column automatically monitors its own state through sensors detecting plunger position, fluid levels, and pressure conditions. The controller autonomously determines when to switch between different plunger speeds based on sensor inputs, allowing the system to self-regulate without continuous operator intervention.
2Productivity
If the plunger is lowered at maximum speed, then the operation is fast and productive, but the plunger may continue downward after encountering liquid, causing undesirable over-packing of the media bed
Solution Approach 1:
The patent implements dynamic speed adjustment where the plunger operates at maximum speed during empty column traversal but automatically reduces to slower speeds when sensors detect the presence of liquid or when approaching the media bed. The controller programmably selects from multiple speed settings based on real-time operational conditions, optimizing both productivity and packing precision.
Solution Approach 2:
The system uses feedback from sensors that detect plunger position, fluid levels, and pressure changes to automatically adjust plunger speed. When sensors indicate the plunger has encountered liquid or is approaching the media bed, the controller receives feedback signals and automatically switches from maximum speed to slower speeds, preventing over-packing while maintaining efficient operation during other phases.
3Ease of operation
If a single maximum speed is used for plunger operation, then the system is simple to operate, but the system lacks adaptability to different operational phases and conditions
Solution Approach 1:
The patent implements a multi-functional control system where a single controller performs multiple functions: it monitors plunger position, detects fluid levels, regulates hydraulic pressure, and selects from multiple predetermined speeds. The system universally handles different operational phases (empty column movement, fluid encounter, media bed approach, packing) through programmable logic, providing adaptability without complicating the user 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
Enables precise control over plunger speed, preventing over-packing and allowing for optimized resin packing by automatically switching to slower speeds upon encountering fluid or pressure changes, improving the efficiency and consistency of the chromatography process.
Implementation Method 1
A top flow adapter or plunger is operatively coupled to a hydraulic piston moveable through at least a portion of the cavity within the cylinder during operation
Data Source
AI summary
A chromatography column is normally filled with a slurry of media for operation. A piston normally compacts the slurry in the column. The piston moves through a cavity in communication with both a slurry inlet and slurry ports which are in communication with the interior of the chromatography column. A controller is configured to automatically adjust piston speeds along elevation zones of operation. Furthermore, presetting specific speeds less the maximum speed can be accomplished with the controller. A pressure sensor may also be employed to assist in switching speed of operation of the piston under particular pressure events.