Passive Halogen Barrier for Adsorbent Protection

Solution Overview

Problem

Existing water treatment systems in space applications face premature fouling due to interactions between adsorbent beds and halogen-release materials, leading to reduced contaminant removal capacity and increased costs from early component return.

Innovation Solution

A water treatment system incorporating a passive halogen barrier, positioned between the adsorbent bed and halogen-release material, to prevent halogen diffusion and maintain adsorbent performance, combined with a compact design using pleated polyolefin sheets and separate or common cartridges for efficient operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If halogen-release material is placed adjacent to the adsorbent bed to maintain biocide levels, then water treatment effectiveness is improved, but halogen diffusion causes adsorbent fouling and capacity loss

Engineering Contradiction:

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

A barrier layer is introduced between the halogen-release material and the adsorbent bed to prevent direct contact and halogen diffusion. This intermediary layer allows water to pass through while blocking halogen molecules, thereby maintaining the effectiveness of both the halogen-release material and the adsorbent bed without mutual interference.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of repair

If adsorbent bed and halogen-release material are placed in separate cartridges for maintenance flexibility, then ease of repair is improved, but device complexity increases

Engineering Contradiction:

Core Design Contradiction:

Ease of repairVSDevice complexity

Solution Approach 1:

The water treatment system is divided into separate modular cartridges - one for the adsorbent bed and another for the halogen-release material. Each cartridge can be independently removed and replaced, allowing flexible maintenance and repair operations without affecting the entire system, while the modular design standardizes interfaces to manage complexity.

Inventive Principle:

Principle #1Segmentation

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 system effectively reduces halogen diffusion, maintaining adsorbent capacity and extending system performance, while ensuring compactness and cost-effectiveness, especially in space environments where component replacement is costly.

Implementation Method 1

a passive halogen barrier intermediate the adsorbent bed and the halogen-release material

Methodology Applied

Scientific EffectDiffusion barrier: Diffusion Barrier

Implementation Method 2

an adsorbent bed, a halogen-release material downstream of, and adjacent to, the adsorbent bed

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 3

a halogen-release material downstream of, and adjacent to, the adsorbent bed

Methodology Applied

Scientific EffectHalogen release:

Data Source

PatentEP3418259B1Water treatment system with passive halogen barrier

Publication Date: 2021.09.29

Figure 1~4
Figure 5~6

AI summary

A water treatment system (20) includes an adsorbent bed (24), a halogen-release material (26) downstream of, and adjacent to, the adsorbent bed (24), and a passive halogen barrier (28) intermediate of the adsorbent bed (24) and the halogen-release material (26).