Magnesium Ion Replenishment via CO2-Enhanced Solid Bed Dissolution
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Solution Overview
Problem
Current methods for increasing magnesium ion concentration in water, such as using highly soluble magnesium salts, introduce unwanted anions like chloride or sulfate and are costly, while also being inefficient in terms of time and installation size.
Innovation Solution
A method involving increasing the concentration of carbon dioxide in feed water and passing it through a solid bed containing poorly water-soluble magnesium ion sources, such as brucite or hydromagnesite, to rapidly and effectively replenish magnesium ions without introducing unwanted anions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If highly soluble magnesium salts are used for remineralization, then magnesium ion concentration is increased quickly, but unwanted anions (chloride, sulfate) are introduced and costs increase
Solution Approach 1:
The invention extracts only the beneficial magnesium ions from magnesium-containing materials while leaving the harmful anions behind.通过使用含镁材料（如镁氧化物、镁氢氧化物、镁碳酸盐）与酸反应，选择性地向水中释放镁离子，而将氯离子、硫酸根离子等有害阴离子保留在固体残渣中，从而解决了高效补充镁离子与避免有害阴离子引入之间的矛盾
Solution Approach 2:
The invention introduces acid (or acidic substances) as an intermediary that facilitates the selective release of magnesium ions. The acid reacts with the magnesium-containing material to produce magnesium ions in solution while the anions remain bound in the solid phase. This intermediary enables the decoupling of magnesium ion release from harmful anion introduction
2Quantity of substance
If conventional remineralization methods are used, then magnesium replenishment is achieved, but installation size and processing time are excessive
Solution Approach 1:
The invention changes the chemical parameters of the water (adding acid or acidic substances) to accelerate the dissolution and release of magnesium ions from the solid material. By adjusting pH and chemical composition, the magnesium ion release process is significantly sped up, reducing processing time while maintaining compact installation size
3Productivity
If highly soluble magnesium salts are used, then magnesium dosage is rapid, but installation complexity and cost increase
Solution Approach 1:
The invention uses inexpensive, readily available magnesium-containing materials (such as magnesium oxide, magnesium hydroxide, magnesium carbonate) that can be easily replaced. These materials are processed through a simple system that rapidly releases magnesium ions, achieving high productivity without complex equipment. The simplicity of the materials and process reduces both installation complexity and cost
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 method allows for precise magnesium dosage, reduced installation size, and faster magnesium replenishment, producing water with acceptable turbidity and mineral composition suitable for drinking.
Implementation Method 1
increasing the concentration of carbon dioxide in said inlet flow QIN to obtain a flow of carbon dioxide-containing feed water QCO2
Implementation Method 2
passing said flow QCO2 through a solid bed to obtain an outlet flow of treated water QOUT; the solid bed comprises a magnesium ion source in the form of solid particles
Data Source
AI summary
The present invention relates to a method for increasing the magnesium ion concentration of feed water. The method comprises the steps of providing an inlet flow of feed water (QIN), increasing the concentration of carbon dioxide in said inlet flow QIN to obtain a flow of carbon dioxide-containing feed water (QCO2), and passing said flow QCO2 through a solid bed comprising a magnesium ion source to obtain an outlet flow of treated water (QOUT) having an increased concentration of magnesium ions. The invention further relates to a water treatment system for increasing the magnesium ion concentration of feed water and a corresponding flow reactor.