Amorphous Iron Oxide Hydroxide Regeneration via Flotation
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Solution Overview
Problem
The existing technologies lack effective methods for the rapid and mass regeneration of amorphous iron oxide hydroxide after it has been used as a desulfurizer, leading to waste and environmental pollution due to the inability to regenerate conventional desulfurizers efficiently.
Innovation Solution
A method involving grinding waste mixtures into powders, creating suspensions with oxygen gas to separate elemental sulfur from amorphous iron oxide hydroxide through flotation, allowing for the regeneration of amorphous iron oxide hydroxide with maintained sulfur capacity, using auxiliary agents like water glass and kerosene to enhance separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional desulfurizers are used, then sulfur removal is achieved, but regeneration is impossible or costly leading to waste accumulation
Solution Approach 1:
The patent applies discarding and recovering by separating elemental sulfur from the spent desulfurizer material through flotation, then recovering the regenerated amorphous iron oxide hydroxide for reuse. The process discards only the sulfur byproduct while recovering the active desulfurizing component, enabling cyclic use and eliminating waste accumulation.
Solution Approach 2:
The patent applies taking out (extraction) by removing elemental sulfur from the spent desulfurizer matrix through flotation separation. The sulfur is extracted as a separate phase that can be removed, leaving behind the regenerated amorphous iron oxide hydroxide ready for reuse.
2Productivity
If natural regeneration of amorphous iron oxide hydroxide is allowed, then regeneration occurs, but the process is very slow and lasts a long time
Solution Approach 1:
The patent applies pneumatics and hydraulics by using air flotation to separate sulfur from the spent desulfurizer. Air bubbles attach to the sulfur particles and carry them to the surface, enabling rapid separation that is much faster than natural regeneration processes.
Solution Approach 2:
The patent applies mechanical vibration through the flotation process which creates turbulent conditions and bubble-particle interactions that accelerate the separation of sulfur from the desulfurizer material, significantly reducing regeneration time compared to passive natural regeneration.
3Object-affected harmful factors
If large quantities of waste desulfurizer are buried, then environmental pollution is prevented, but resources are wasted
Solution Approach 1:
The patent applies discarding and recovering by separating and removing only the sulfur byproduct while recovering the amorphous iron oxide hydroxide for reuse. This eliminates the need to bury entire spent desulfurizer materials, preventing both pollution and resource waste simultaneously.
Solution Approach 2:
The patent applies parameter changes by transforming the spent desulfurizer material back into its active form through the flotation separation process. The physical and chemical parameters of the iron oxide hydroxide are restored, enabling it to regain its desulfurizing capability and be reused.
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 enables fast and efficient regeneration of amorphous iron oxide hydroxide, allowing for repeated use as a desulfurizer, optimizing resource utilization, reducing waste, and improving environmental protection by separating elemental sulfur and amorphous iron oxide hydroxide through a physical flotation process.
Implementation Method 1
charging the suspension with a gas containing oxygen to obtain a slurry comprising amorphous iron oxide hydroxide and elemental sulfur
Implementation Method 2
charging the slurry or the solid with air so that the elemental sulfur floats and the amorphous iron oxide hydroxide precipitates
Implementation Method 3
the amorphous iron oxide hydroxide precipitates
Data Source
AI summary
Methods for regenerating amorphous iron oxide hydroxide after being used as desulfurizer by (1) grinding a waste mixture into waste powder, wherein the waste mixture results from use of the composition comprising amorphous iron oxide hydroxide as desulfurizer; (2) preparing the waste powder into a suspension and charging the suspension with a gas containing oxygen to obtain a slurry comprising amorphous iron oxide hydroxide and elemental sulfur; and (3) placing the slurry or a solid resulting from filtering the slurry into a container and charging the slurry or the solid with air so that the elemental sulfur floats and the amorphous iron oxide hydroxide precipitates.