Dry-Cleaning Solvent Filtration for Dark and Pale Articles
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Solution Overview
Problem
Existing dry-cleaning machines using hydrocarbon- or silicone-based solvents face limitations in effectively and economically cleaning both dark and pale articles, as powder filters can become less effective and cause color contamination when switching between dark and light fabrics, leading to staining of pale items.
Innovation Solution
A dry-cleaning machine with a system that includes both powder and cartridge filters, along with a solvent recovery and conditioning circuit, which uses a powder filter for dark articles and a cartridge filter for pale articles, and incorporates a solvent recycling process to maintain solvent quality and prevent color transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If powder filters are used for filtering solvent after dry-cleaning dark articles, then filtering cost is reduced, but the solvent contains traces of colour that damage pale articles subsequently treated
Solution Approach 1:
The filtering system is segmented into two distinct paths: one for dark articles using powder filters, and another for pale articles using cartridge filters. This segmentation allows each filter type to be optimized for its specific application, preventing color contamination while managing costs effectively.
Solution Approach 2:
The system dynamically switches between powder filters and cartridge filters based on the article type being processed. The control system automatically selects the appropriate filter path, making the filtering mechanism adaptive to different operational requirements.
2Object-affected harmful factors
If cartridge filters are used for filtering solvent, then color contamination of pale articles is prevented, but filtering cost increases
Solution Approach 1:
The filtering system is segmented into two distinct paths: one for dark articles using powder filters, and another for pale articles using cartridge filters. This segmentation allows each filter type to be optimized for its specific application, preventing color contamination while managing costs effectively.
Solution Approach 2:
Different filter qualities are applied locally based on the specific cleaning requirement: powder filters (lower cost) for dark articles where color contamination is not an issue, and cartridge filters (higher cost) for pale articles where color contamination must be prevented.
3Reliability
If powder filters are used, then filtering effectiveness is sufficient for dark articles, but they become less effective when switching to pale articles
Solution Approach 1:
The system dynamically switches between powder filters and cartridge filters based on the article type being processed. The control system automatically selects the appropriate filter path, making the filtering mechanism adaptive to different operational requirements.
Solution Approach 2:
The filtering system achieves universality by incorporating both powder and cartridge filters, enabling it to handle both dark and pale articles effectively. The system can adapt its filtering capability to match the specific requirements of different article types.
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 machine enables effective and economical dry-cleaning and drying cycles for both dark and pale articles by utilizing the appropriate filter type, ensuring efficient solvent filtration and recovery, thus preventing color contamination and extending filter life.
Implementation Method 1
the solvent coming out of the container used for dry-cleaning the articles, which is therefore loaded with impurities removed from the articles, is passed through a predetermined quantity of filter powders of the known type, said powders catching the impurities
Implementation Method 2
Cartridge filters operate in a similar way: the solvent coming out of the container used for dry-cleaning the articles, which is therefore loaded with impurities removed from the articles, is passed through a filter cartridge which catches the impurities
Data Source
AI summary
The machine (1) for dry-cleaning and drying articles such as clothes, household linen, towels, curtains and the like comprises a rotary drum (2) which contains the articles, a hydrocarbon - solvent feed and recovery circuit (16), a powder filter (22) and a cartridge filter (122) for filtering the hydrocarbon - solvent.