Replaceable Cartridge Ion Exchange Resin System for Drinking Water Treatment
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Solution Overview
Problem
Existing methods for treating drinking water using ion exchange filter cartridges often result in excessive removal of mineral salts, inadequate adjustment of ion concentrations, and pH imbalance, failing to produce water with consistent chemical and physical features suitable for human consumption.
Innovation Solution
A method utilizing a replaceable cartridge filtering system with a mixture of ion exchange resins, allowing for the retention and release of ions to adjust calcium, magnesium, and other mineral salt concentrations, while minimizing heavy metals, and maintaining a neutral pH, by correlating specific cartridges with desired water types and classes based on chemical and physical features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If ion exchange resins are used to remove heavy metals from water, then heavy metal content is reduced, but mineral salt concentration is excessively depleted
Solution Approach 1:
The patent divides the ion exchange process into multiple sequential stages using different resin types. The first stage uses resins that selectively remove heavy metals while preserving mineral salts, and subsequent stages use resins that adjust ion concentrations to achieve desired mineral content levels, thus resolving the contradiction between heavy metal removal and mineral salt preservation
Solution Approach 2:
The patent changes the operational parameters of the ion exchange process by using resins with different selectivity coefficients and capacity values for various ions. By selecting resins with specific parameters that favor heavy metal binding over mineral salt binding, the system achieves selective removal while maintaining beneficial mineral concentrations
2Stability of the object's composition
If ion exchange resins are used to adjust water hardness, then calcium and magnesium levels are modified, but pH balance is disrupted
Solution Approach 1:
The patent introduces a buffering system as an intermediary between the ion exchange resins and the water. This buffer acts as a mediator that absorbs excess hydrogen ions released during ion exchange, preventing pH drops while allowing the resins to continue adjusting calcium and magnesium levels for hardness control
Solution Approach 2:
The patent creates a composite filtering system that combines ion exchange resins with buffering materials and potentially other functional components. This composite structure allows simultaneous achievement of hardness adjustment and pH stabilization that neither component could achieve alone
3Manufacturing precision
If a single type of ion exchange resin is used, then one ion concentration is adjusted, but other ion concentrations become unbalanced
Solution Approach 1:
The patent segments the ion exchange function across multiple resin types, each specialized for specific ion adjustments. This segmentation allows precise control of individual ion concentrations while maintaining overall chemical balance through the coordinated action of different resin components
Solution Approach 2:
The patent designs a multi-functional filtering system where different resin types perform complementary functions: some resins remove heavy metals, others adjust hardness, and still others replenish beneficial minerals. This multi-functionality ensures comprehensive ion concentration control while maintaining overall water quality balance
4Object-affected harmful factors
If ion exchange resins are used to remove all ions, then heavy metals are eliminated, but water becomes deficient in essential minerals
Solution Approach 1:
The patent applies the principle of local quality by using resins with different selectivity characteristics in different stages of the filtering process. Early stages use resins with high selectivity for heavy metals, while later stages use resins that are less selective and can replenish essential minerals, thus achieving local optimization of ion removal and addition
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 enables the production of filtered water with desired mineral salt concentrations and reduced heavy metals, ensuring water quality suitable for human consumption, regardless of the input water's characteristics, with a stable pH and balanced mineral content.
Implementation Method 1
Treatment methods which use ion exchange filter cartridges to modify the ion concentration in the filtered water
Data Source
AI summary
A method for treating drinking water by modifying the ion concentration in the filtered water by means of a replaceable cartridge filtering system comprises: —defining a plurality of types of water to be filtered on the basis of chemical and physical features of the water to be treated; —defining a plurality of classes of filtered water to be obtained with the filtering system on the basis of chemical and physical features of the filtered water; —providing a plurality of filter cartridges containing a filtering material based on a mixture of two or more ion exchange resins, the mixture being formed from predetermined proportions of the two or more resins, each cartridge of the plurality of cartridges having a different mixture of the two or more resins and being capable of retaining ions from, and/or releasing ions into, the water filtered in the filtration process; —correlating one or more of the classes of filtered water with each cartridge of the plurality of cartridges for each type of water to be filtered; —selecting a cartridge from the plurality of cartridges in order to obtain a desired class of filtered water on the basis of a specified type of water to be filtered.