Ammoniated Solution Non-Volatile Removal
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Solution Overview
Problem
Current methods for removing carbon dioxide from flue gases using ammoniated solutions are inefficient due to the buildup of non-volatile compounds, which increase corrosivity and reduce the effectiveness of the CO2 removal process, leading to higher operational and investment costs in industrial gas purification systems.
Innovation Solution
Incorporating a gas-liquid separating device to separate ammonia-rich and ammonia-lean phases within the CO2 removal system, allowing for the reintroduction of the ammonia-rich gas phase into the circulating ammoniated solution and the removal of non-volatile compounds, thereby improving the CO2 absorption efficiency and reducing chemical consumption and waste volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ammoniated solution is circulated continuously for CO2 removal, then CO2 absorption efficiency is maintained, but non-volatile compounds accumulate increasing corrosivity
Solution Approach 1:
The patent extracts and removes non-volatile compounds from the circulating ammoniated solution by introducing the solution to a stripper where non-volatile compounds are separated and removed, preventing their accumulation while maintaining continuous circulation for CO2 removal
Solution Approach 2:
The patent discards non-volatile compounds that accumulate in the ammoniated solution through the stripper unit, recovering clean ammoniated solution that can continue to be used for CO2 absorption, thus maintaining efficiency while reducing corrosivity
2Object-affected harmful factors
If non-volatile compounds are removed from ammoniated solution, then corrosivity decreases, but system complexity increases
Solution Approach 1:
The patent merges the non-volatile compound removal function with the existing CO2 removal system by integrating a stripper unit that can be combined with the absorber and regenerator, avoiding completely separate treatment systems
Solution Approach 2:
The stripper unit serves multiple functions: removing non-volatile compounds, preventing corrosion, and maintaining ammoniated solution quality for continuous CO2 removal, making the system more versatile without proportionally increasing complexity
3Productivity
If ammoniated solution is regenerated at elevated temperature, then CO2 is separated effectively, but energy consumption increases
Solution Approach 1:
The patent changes the temperature parameter during regeneration to elevated levels to effectively separate CO2 from the ammoniated solution, then cools the solution back to operational temperature for the absorption cycle, optimizing the balance between separation efficiency and energy consumption
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 enhances the CO2 absorption process by reducing the concentration of non-volatile compounds, decreasing corrosivity, and lowering operational costs through reduced chemical consumption and waste management, while maintaining the efficiency of the CO2 removal system.
Implementation Method 1
separating the portion of the circulating ammoniated solution stream into an ammonia rich gas phase and a liquid phase comprising the non-volatile compounds
Implementation Method 2
capturing carbon dioxide from a flue gas... in a CO2 absorber by means of an ammoniated solution... The CO2 is absorbed by the ammoniated solution in the absorber
Implementation Method 3
the ammoniated solution is regenerated in a regenerator under elevated pressure and temperature to allow the CO2 to escape the ammoniated solution as gaseous carbon dioxide
Implementation Method 4
allow the CO2 to escape the ammoniated solution as gaseous carbon dioxide of high purity
Data Source
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AI summary
A system is arranged to remove carbon dioxide (CO2) from a gas stream by bringing the gas stream into contact with a circulating ammoniated solution stream such that CO2 is removed from the gas stream by the ammoniated solution stream. A method of removing non-volatile compounds from the circulating ammoniated solution stream includes: introducing a portion of the circulating ammoniated solution stream into a gas-liquid separating device; and separating the introduced ammoniated solution into an ammonia rich gas phase and a liquid phase comprising the non-volatile compounds; and reintroducing the ammonia rich gas phase into the circulating ammoniated solution stream.