Porous Low-Load Liquid Distributor for Uniform Column Wetting
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Solution Overview
Problem
Achieving uniform liquid distribution across the cross-sectional area of mass transfer columns during low-load operation is challenging due to small bore or slot sizes, making production difficult and reducing operation reliability.
Innovation Solution
The use of absorbent open-pored storage material with increasing flow resistance in the direction of liquid flow, combined with a two-layer structure and weirs, ensures liquid accumulation and uniform distribution, with the pore size decreasing towards the dispensing points and the capillary effect aiding lateral distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the bore or slot sizes are reduced to achieve uniform liquid distribution at low load, then the liquid distribution uniformity is improved, but the production difficulty increases and operation reliability decreases
Solution Approach 1:
The patent employs porous distribution elements with controlled pore structures instead of small bores or slots. The porous material provides numerous flow paths that prevent clogging while maintaining uniform liquid distribution. The pore size and distribution can be optimized to achieve the desired flow characteristics without the reliability issues associated with small conventional openings.
Solution Approach 2:
The patent changes the physical parameters of the distribution elements by using porous materials with specific pore size distributions, porosity values, and surface properties. This allows tuning the liquid flow characteristics to achieve uniform distribution at low loads without requiring extremely small bore sizes that would compromise reliability.
2Manufacturing precision
If the bore or slot sizes are reduced to achieve uniform liquid distribution at low load, then the liquid distribution uniformity is improved, but the production difficulty increases
Solution Approach 1:
The patent uses porous materials that can be manufactured through established ceramic or polymer processing techniques. These materials provide the necessary flow characteristics without requiring precision machining of small bores or slots, significantly simplifying production while maintaining uniform liquid distribution performance.
Solution Approach 2:
The porous distribution elements can be manufactured as cost-effective components using standard porous material processing. This approach replaces expensive precision-machined small-bore components with more economically manufacturable porous elements that achieve the same functional result.
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 solution provides uniform liquid distribution across the entire surface of packing stages, ensuring reliable operation and easy manufacturing by increasing dwell time and reducing the risk of clogging, while allowing for precise control over drip points and minimizing contamination.
Implementation Method 1
the pore size of the storage material decreases in the direction of liquid flow... The storage material comprises an open inner pore structure, i.e. the pores are interconnected so that the liquid can flow through the storage material
Implementation Method 2
the flow resistance of the storage material increases in the flow direction of the liquid, i.e. starting from the liquid supply in the direction of the liquid dispensing points
Data Source
AI summary
A low-load distributor is disclosed for mass transfer columns for applying liquid onto the surface of packing stages of the mass transfer columns with at least one liquid supply, a plurality of liquid dispensing points and dwell time delay devices disposed between the liquid supply and the liquid dispensing points. An exemplery low-load distributor can be easily manufactured for a very low liquid flow rate and is characterized by high operation reliability. A dwell time delay devices can include absorbent open-pored storage material and the flow resistance of the storage material can increase in the liquid flow direction, starting from the liquid supply in the direction towards the liquid dispensing points.