System for purifying argon by cryogenic distillation
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Solution Overview
Problem
Conventional cryogenic distillation air separation units face challenges in achieving low minimum load operation without significant efficiency loss, particularly in argon purification, due to imperfections in liquid distribution across column sections, leading to uneven flow rates and composition differences.
Innovation Solution
The system employs high-performance distributors in the upper sections of the column and mixing distributors in the lower sections to maintain consistent liquid distribution, with varying heights and configurations to compensate for manufacturing imperfections, ensuring efficient operation across varying load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional distributors are used in cryogenic distillation columns, then the system can operate at higher loads with simpler distribution, but the liquid distribution becomes uneven at reduced loads leading to efficiency loss
Solution Approach 1:
The patent applies different distributor designs to different sections of the column. Upper sections use high-performance distributors with specific geometric features for precise distribution, while lower sections use mixing distributors that compensate for imperfections through liquid mixing. This local differentiation allows each section to be optimized for its specific operational requirements.
Solution Approach 2:
The column is divided into multiple sections with different distributor types. The segmentation allows the system to handle varying load conditions in different zones, with mixing distributors in lower sections compensating for distribution imperfections that would affect overall column performance.
2Stability of the object's composition
If mixing distributors are installed in lower zones to compensate for distribution deficiencies, then composition consistency improves, but device complexity increases
Solution Approach 1:
Mixing distributors are specifically installed in lower zones where composition variations are most critical. The mixing function is localized to where it provides maximum benefit, rather than being applied uniformly throughout the entire column, thus balancing complexity with performance improvement.
3Manufacturing precision
If distributors are designed to maintain liquid head height at reduced load, then distribution quality is maintained, but distributor height must be increased
Solution Approach 1:
The patent changes the geometric parameters of distributors, particularly in upper sections, to optimize liquid head management. By adjusting distributor geometry rather than simply increasing height, the system maintains distribution quality at reduced loads without proportionally increasing distributor dimensions.
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 approach allows for efficient argon purification with reduced minimum load requirements, maintaining flow rate uniformity and composition consistency, even at reduced operational loads, thereby optimizing energy consumption.
Implementation Method 1
System for purifying argon by cryogenic distillation
Data Source
AI summary
System for purifying argon by cryogenic distillation, comprising a single column surmounted by a top-end condenser, a fluid inlet in the lower part of the column, a fluid outlet in the upper part of the column, and N distillation sections where N≥4, of which at least the two uppermost sections of the column are equipped respectively with a first liquid distributor and with a second liquid distributor, the second distributor being capable of performing a function of mixing together liquids that fall onto the distributor, each of the first and second distributors being positioned above the respective section and of which the two lowermost sections of the column are respectively equipped with a (N−1)th and an Nth liquid distributor capable of performing a function of mixing together liquids that fall onto the distributor, and which is arranged above the respective section, the first, second, (N−1)th and Nth distributors each being dimensioned to contain a maximum height of liquid head, that (those) of the first and second distributors being greater than that (those) of the (N−1)th and Nth distributors.