Anti-foaming Magnesium Hydroxide Suspension for Flue Gas Desulfurization
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Solution Overview
Problem
Magnesium hydroxide suspensions face challenges with foaming issues in industrial processes, particularly in gas washing water treatment within wet or semi-humid flue gas desulphurization systems, where existing anti-foaming agents like silicone-based oils are not effective in maintaining reactivity and stability, and traditional methods to address foaming are cumbersome and inefficient.
Innovation Solution
An aqueous suspension of magnesium hydroxide with a high concentration of magnesium hydroxide particles, a dispersant such as polyether polycarboxylates, and an anti-foaming agent like organic oils or polyglycols, without silicone oil, is formulated to maintain stability and reactivity, effectively preventing foaming without compromising the suspension's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If silicone-based anti-foaming agents are used in magnesium hydroxide suspension, then foaming is reduced, but the suspension's reactivity and stability are compromised
Solution Approach 1:
The patent changes the chemical composition parameters of the anti-foaming agent by excluding silicone-based compounds and specifying alternative organic oils, polyglycols, fatty acid esters, or polyesters. This parameter change allows the suspension to maintain its reactivity and stability while effectively preventing foaming, as the new anti-foaming agents do not interfere with the magnesium hydroxide's chemical properties.
Solution Approach 2:
The patent employs alternative anti-foaming agents that are simpler, more compatible with the suspension system, and do not require complex formulations. These agents provide effective foam control without the need for additional stabilizing components, thereby maintaining suspension reliability.
2Object-affected harmful factors
If traditional methods to address foaming are used in magnesium hydroxide suspension, then foaming is controlled, but the process becomes cumbersome and inefficient
Solution Approach 1:
The patent merges the anti-foaming function directly into the magnesium hydroxide suspension formulation by incorporating compatible anti-foaming agents (organic oils, polyglycols, fatty acid esters, or polyesters) as integral components. This integration eliminates the need for separate anti-foaming treatment systems, mechanical devices, or complex process control mechanisms, thereby simplifying the overall process while maintaining effective foam control.
3Reliability
If high concentration of magnesium hydroxide particles is used, then reactivity is improved, but foaming issues worsen
Solution Approach 1:
The patent introduces compatible anti-foaming agents (organic oils, polyglycols, fatty acid esters, or polyesters) as intermediary substances that mediate between the high concentration of magnesium hydroxide particles and the foam formation process. These intermediaries prevent foam stabilization at the gas-liquid interface while allowing the suspension to maintain its high particle concentration and reactivity, thus resolving the contradiction between reactivity and foaming control.
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 suspension effectively prevents foaming in industrial processes, maintaining the reactivity and stability of magnesium hydroxide, thus ensuring efficient operation and reducing the risk of overflow and pollution, as demonstrated in on-board desulphurization systems and other industrial applications.
Implementation Method 1
a dispersant such as polyether polycarboxylates
Implementation Method 2
the dispersant, advantageously selected from the group consisting of homopolymers or copolymers of acrylic acid or methacrylic acid and their salts
Implementation Method 3
an anti-foaming agent like organic oils or polyglycols
Implementation Method 4
at least one anti-foaming agent, advantageously selected from the group consisting of organic oils, polyglycols, fatty acid esters or polyesters
Implementation Method 5
Magnesium hydroxide suspensions are used in many applications as an alkali or alkaline agent (basic substance), such as neutralizing industrial acid waste, adjusting pH
Data Source
Figure 1~2
AI summary
The present invention relates to an aqueous magnesium hydroxide suspension comprising: a) at least 40 wt.%, relative to the total weight of the suspension, of magnesium hydroxide particles; b) from 0.001 to 5 wt.%, relative to the total weight of the magnesium hydroxide, of at least one dispersant and c) from 0.001 to 5 wt.%, relative to the total weight of the suspension, of at least one anti-foaming agent. The present invention further relates to the use of this aqueous suspension for the treatment of gas washing water in an on-board wet or semi-wet flue gas desulfurization system, the treatment of effluent at a municipal or industrial wastewater treatment plant, in industrial transformation processes or bioprocesses involving a fermentation or respiration process, or in the paper production process or in agriculture.