CO2 Absorption Material Protection in Cement Exhaust Gas
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Solution Overview
Problem
Cement production exhaust gas contains high levels of oxides and other harmful components that degrade the CO2 absorption material and cause pressure loss in equipment, making it difficult to effectively separate and recover CO2 using conventional methods.
Innovation Solution
A CO2 separation and recovery method that removes acidic components like SOx, NOx, and harmful components such as H2O and dusts from the cement production exhaust gas before contacting it with a CO2 absorption material, preventing deterioration of the absorption material and enhancing CO2 recovery efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CO2 separation is performed directly on cement production exhaust gas using conventional desulfurization methods, then CO2 recovery is attempted, but the CO2 absorption material deteriorates rapidly due to acidic components (SOx, NOx, halogen) and harmful components (H2O, dusts)
Solution Approach 1:
The patent applies preliminary action by removing acidic components (SOx, NOx, halogen) and harmful components (H2O, dusts) from the exhaust gas before the CO2 separation process. This pre-treatment prevents the CO2 absorption material from direct contact with substances that would cause deterioration, thereby maintaining material performance stability throughout the CO2 recovery operation.
2Productivity
If CO2 separation is performed on exhaust gas containing dusts, then CO2 recovery is attempted, but dusts adhere to pipes and generate scales that increase pressure loss and decrease gas throughput
Solution Approach 1:
The patent removes harmful components including dusts from the exhaust gas before CO2 separation. This preliminary removal prevents dusts from adhering to pipes and forming scales, thereby avoiding increased pressure loss and maintaining adequate gas throughput for efficient CO2 recovery operations.
3Reliability
If conventional desulfurization is used on cement exhaust gas containing multiple oxides, then sulfur compounds are removed, but other acidic components (NOx, halogen) and harmful components remain and interfere with CO2 absorption
Solution Approach 1:
The patent employs a harmful component removal unit with multi-functionality that can remove various acidic components (SOx, NOx, halogen) and harmful substances (H2O, dusts) simultaneously. This universal removal capability ensures that all substances interfering with CO2 absorption are eliminated, making the system adaptable to the complex composition of cement production exhaust gas.
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 effectively suppresses the deterioration of CO2 absorption material performance, allowing for efficient CO2 recovery from cement production exhaust gas, maintaining stability over time and reducing greenhouse gas emissions by utilizing the recovered CO2 as an alternative fuel.
Implementation Method 1
separating and recovering CO2 by bringing exhaust gas from a cement production facility into contact with a CO2 absorption material
Data Source
AI summary
A CO2 separation/recover method in cement production exhaust gas has a step of harmful component removal that removes an acidic component and a harmful component from exhaust gas discharged from a cement production facility; and a step of CO2 separation and recover that separates and recovers CO2 by bringing the exhaust gas from which the acidic component and the harmful component are removed into contact with a CO2 absorption material, so that the acidic component and the harmful component are removed before separating and recovering CO2, resulting in deterioration of the absorbing ability of the CO2 absorption material being suppressed; and the cement production exhaust gas can be appropriately disposed.