Argon Column Bed Layout for Shorter Air Separation Towers

Solution Overview

Problem

Existing argon columns in air separation units are not optimized to reduce the height of the distillation column without compromising distillation performance.

Innovation Solution

The argon column is divided into an upper section and a lower section, with both sections having beds of the same length. The upper section length is 72% or less of the total bed length, and the upper bed length is 1.25 times or more than the lower bed length, allowing for a reduction in the total number of beds and internals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of stationary object

If the argon column uses conventional bed configurations with equal or nearly equal bed lengths, then the distillation performance is maintained, but the height of the distillation column cannot be reduced

Engineering Contradiction:

Improveheight of distillation columnVSAvoiddistillation performance

Core Design Contradiction:

Length of stationary objectVSReliability

Solution Approach 1:

The patent applies local quality by differentiating bed lengths between upper and lower sections of the argon column. Specifically, the upper bed length is set to 1.25 times or more than the lower bed length, creating non-uniform local characteristics that optimize both column height reduction and distillation performance maintenance. This localized variation in bed length allows the system to achieve compact dimensions while preserving separation efficiency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements parameter changes by modifying the bed length parameter from the conventional equal-length configuration to a differentiated configuration where upper bed length ≥ 1.25 × lower bed length. Additionally, the upper section length is constrained to be 72% or less of the total bed length. These parameter adjustments enable the dual objective of reducing overall column height while maintaining adequate distillation performance through optimized mass transfer zones.

Inventive Principle:

Principle #35Parameter changes

2Length of stationary object

If the argon column height is reduced by decreasing bed lengths or number of beds, then the column size is downsized, but distillation performance deteriorates

Engineering Contradiction:

Improvecolumn sizeVSAvoiddistillation performance

Core Design Contradiction:

Length of stationary objectVSProductivity

Solution Approach 1:

The patent applies local quality by differentiating bed lengths between upper and lower sections of the argon column. Specifically, the upper bed length is set to 1.25 times or more than the lower bed length, creating non-uniform local characteristics that optimize both column height reduction and distillation performance maintenance. This localized variation in bed length allows the system to achieve compact dimensions while preserving separation efficiency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements parameter changes by modifying the bed length parameter from the conventional equal-length configuration to a differentiated configuration where upper bed length ≥ 1.25 × lower bed length. Additionally, the upper section length is constrained to be 72% or less of the total bed length. These parameter adjustments enable the dual objective of reducing overall column height while maintaining adequate distillation performance through optimized mass transfer zones.

Inventive Principle:

Principle #35Parameter changes

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 configuration reduces the height of the distillation column while maintaining distillation performance, enabling the downsizing of the air separation unit without compromising efficiency.

Implementation Method 1

an argon column for an air separation unit including a high-pressure column, a low-pressure column, and an argon column, that is a structured packed column using structured packing materials, and that produces an argon product using a fluid supplied from a middle portion of the low-pressure column as a raw material

Methodology Applied

Scientific EffectDistillation: Distillation

Data Source

PatentUS20250085050A1Argon column for air separation unit and air separation unit

Publication Date: 2025.03.13 NIPPON SANSO CORP

AI summary

An object of the present invention is to provide an argon column for an air separation unit in which the height of the distillation column is reduced without reducing distillation performance. The present invention provides an argon column for an air separation unit including an upper section and a lower section; the upper section and the lower section both have a bed having the same bed length within the same section; the upper section length is 72% or less of the total bed length; and the upper bed length is 1.25 times or more than the lower bed length.