Regenerating Denitration Catalysts Using CO2 Bubble Washing
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Solution Overview
Problem
Existing methods for regenerating deactivated denitration catalysts are complex and environmentally unfriendly due to the use of sulfuric acid, which complicates the treatment of waste liquids and does not effectively restore the catalyst's activity.
Innovation Solution
A method and apparatus using a washing fluid containing water and entrained carbon dioxide bubbles to treat deactivated denitration catalysts, with an optional ultrasonic treatment, which facilitates the detachment of contaminants and replenishes active components, thereby regenerating the catalyst's activity without strong acids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sulfuric acid is used in the mixed solution to remove alkali metal compounds, then the catalyst regeneration effectiveness is improved, but the waste liquid treatment complexity increases
Solution Approach 1:
The patent extracts and removes sulfuric acid from the washing fluid composition, replacing it with carbon dioxide bubbles. This extraction eliminates the source of waste liquid treatment complexity while maintaining the catalyst regeneration function through a different mechanism (physical detachment of contaminants via bubble agitation rather than chemical dissolution).
Solution Approach 2:
The patent introduces carbon dioxide bubbles as an intermediary substance to mediate the catalyst regeneration process. The CO2 bubbles serve as a physical mediator that detaches contaminants from the catalyst surface through agitation and bubble collapse, replacing the chemical mediator (sulfuric acid) that previously required complex waste treatment.
2Object-generated harmful factors
If sulfuric acid is used to remove alkali metal compounds, then contaminant removal is improved, but environmental friendliness deteriorates
Solution Approach 1:
The patent converts the previously harmful sulfuric acid into beneficial carbon dioxide bubbles. The CO2 bubbles provide mechanical agitation and detachment force that is equally effective for contaminant removal but environmentally benign, transforming a harmful chemical process into a beneficial physical process.
Solution Approach 2:
The patent changes the fundamental parameter of the washing fluid from a chemical solution (sulfuric acid-based) to a physical gas-liquid mixture (CO2 bubbles in water). This parameter change maintains the contaminant removal function while eliminating the environmental harm associated with sulfuric acid discharge.
3Reliability
If conventional mixed solution is used for catalyst treatment, then catalyst deactivation is addressed, but the treatment process becomes complicated
Solution Approach 1:
The patent extracts the complex chemical components (sulfuric acid, ammonium vanadate, ammonium tungstate) from the treatment solution, retaining only water and carbon dioxide. This extraction dramatically simplifies the treatment process while maintaining catalyst regeneration effectiveness through the physical action of CO2 bubbles.
Solution Approach 2:
The patent uses carbon dioxide bubbles as a disposable, easily manageable treatment medium compared to the complex chemical solution. The CO2 bubbles can be generated on-demand, are environmentally benign, and eliminate the need for complex waste treatment infrastructure, making the overall process simpler and more operationally friendly.
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 method efficiently regenerates denitration catalysts with improved denitration efficiency and simplifies waste liquid treatment by using carbon dioxide bubbles to detach contaminants, while also replenishing active components, resulting in a more environmentally friendly process.
Implementation Method 1
entrained carbon dioxide bubbles to detach contaminants
Implementation Method 2
carbon dioxide bubbles to detach contaminants
Implementation Method 3
mixer pump which is configured to mix the carbon dioxide from the gas supplying device and the water-containing liquid from the reservoir chamber so as to obtain the washing fluid, thereby permitting the washing fluid to be provided to the treatment chamber
Implementation Method 4
The partition wall is configured to permit an excess of the washing fluid in the treatment chamber to overflow into the reservoir chamber through an upper edge of the partition wall
Data Source
AI summary
A method for regenerating a deactivated denitration catalyst includes steps of preparing a washing fluid including a water-contained liquid and entrained carbon dioxide bubbles, and subjecting the deactivated denitration catalyst to a treatment with the washing fluid. An apparatus for regenerating the deactivated denitration catalyst is also provided.