Water Conditioning System Using CO2 Regulation for pH and Hardness Control
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Solution Overview
Problem
Existing water conditioning systems face challenges in independently adjusting carbonate hardness and pH levels, making it difficult to achieve optimal water conditions for specific applications, such as beverage preparation, without adding acids or causing corrosion in appliances.
Innovation Solution
The system regulates CO2 levels in a closed system to maintain stable pH and carbonate hardness, using ion exchange with cation exchange materials, particularly weakly acidic resins, to adjust CO2 levels and blend ratios, allowing for a wide range of carbonate hardness values without affecting pH, and incorporates membrane filtration to control mineral concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If acid is added to adjust pH and carbonate hardness, then pH control is improved, but corrosion of appliances occurs
Solution Approach 1:
The patent changes the chemical parameter approach from direct acid addition to CO2 regulation. By controlling CO2 levels in a closed system, pH is adjusted through carbonic acid formation without using strong acids, thereby achieving precise pH control while avoiding corrosion of appliances.
Solution Approach 2:
CO2 acts as an intermediary substance to achieve pH adjustment. Instead of directly adding corrosive acids, the system introduces CO2 which forms carbonic acid in water, providing a gentler pH adjustment mechanism that protects appliances from corrosion while still achieving the desired pH levels.
2Manufacturing precision
If carbonate hardness is increased, then water quality for beverage preparation is improved, but pH may become unstable
Solution Approach 1:
The patent implements a dynamic control system where CO2 levels are continuously regulated to maintain both carbonate hardness and pH stability. The closed system allows for real-time adjustments, enabling the system to adapt CO2 concentration to achieve desired carbonate hardness while automatically compensating to maintain pH within stable ranges.
Solution Approach 2:
The system employs feedback control mechanisms to monitor and adjust CO2 levels, carbonate hardness, and pH simultaneously. By measuring these parameters and adjusting CO2 injection accordingly, the system maintains the interdependent relationship between carbonate hardness and pH, ensuring that increasing carbonate hardness does not compromise pH stability.
3Adaptability or versatility
If ion exchange with cation exchange materials is used, then CO2 levels are adjusted and carbonate hardness is increased, but system complexity increases
Solution Approach 1:
The patent segments the water treatment process into distinct functional units: a closed CO2 regulation system, an ion exchange unit with cation exchange materials, and a membrane filtration section. This segmentation allows each component to perform its specific function independently, making the overall complex system more manageable and easier to maintain while achieving versatile carbonate hardness adjustment.
Solution Approach 2:
The ion exchange unit with cation exchange materials serves multiple functions: it adjusts CO2 levels, increases carbonate hardness, and works in conjunction with the closed CO2 system to maintain pH stability. This multi-functionality reduces the need for separate dedicated systems, thereby managing complexity while providing versatile water conditioning capabilities.
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 a broader range of pH and carbonate hardness settings, suitable for beverage preparation and other applications, while preventing corrosion and extending membrane lifespan, without the need for acid addition.
Implementation Method 1
at least one device for increasing the level of CO2 in the liquid, in particular by ion exchange with cation exchange materials, particularly weakly acidic resins
Implementation Method 2
incorporates membrane filtration to control mineral concentrations
Implementation Method 3
regulates CO2 levels in a closed system to maintain stable pH and carbonate hardness
Data Source
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AI summary
An apparatus for conditioning an aqueous liquid includes at least one device (7;7';31) for increasing a level of CO2 in the liquid and a processing section (21;21'), downstream of the at least one device (7;7';31) for increasing the level of CO2 in the liquid. The processing section (21;21') includes at least one liquid treatment device (23;23') for dissolving at least one mineral contributing to carbonate hardness into at least some of the liquid passing through the section. The processing section (21;21') includes a sub-section (25;25') accommodating the at least one mineral to be dissolved, defines a flow path bypassing the sub-section (25;25') and includes a mixing location (27;27') for blending at an adjustable ratio liquid led through the sub-section (25;25') with liquid led along the flow path. The at least one device (7;7';31) for increasing a level of CO2 in the liquid is arranged to increase the level to an adjustable value.