Halogen Reservoir Sorbent Composite for Flue Gas
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Solution Overview
Problem
Current pollution control systems for industrial flue gases, such as those from coal-fired power plants, face challenges in durably removing sulfur oxides (SOx), mercury vapor, and fine particulate matters (PM) due to the leaching of halogen sources, which limits their operational lifespan and efficiency.
Innovation Solution
A pollution control system incorporating a halogen reservoir with a sorbent polymer composite (SPC) and permeation control materials, where the halogen reservoir is strategically positioned between SPC layers to provide a controlled release of halogens, enhancing the durability and longevity of the system by managing the release rate of halogens over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a halogen source is used in pollution control systems to remove SOx and mercury vapor, then removal efficiency is improved, but the halogen source leaches away over time, reducing system durability and operational lifespan
Solution Approach 1:
The system divides the halogen delivery mechanism into separate functional layers: a halogen reservoir layer containing the halogen source, and sorbent polymer composite layers that capture pollutants. This segmentation prevents direct contact between the halogen source and leaching environments while maintaining controlled release to the sorbent layers, thereby preserving both removal efficiency and operational lifespan.
Solution Approach 2:
The halogen source is pre-loaded into the reservoir layer and the sorbent polymer composite is pre-configured with its pollutant-capturing structure before deployment. This preliminary preparation ensures that the halogen is ready for controlled release and the sorbent is ready to immediately capture pollutants upon contact, maintaining high removal efficiency throughout the operational lifespan without requiring repeated adjustments.
2Productivity
If halogen release rate is increased to maintain removal efficiency over time, then pollutant removal performance is improved, but halogen leaching increases, reducing system durability
Solution Approach 1:
The sorbent polymer composite acts as an intermediary between the halogen source and the flue gas stream. It receives controlled amounts of halogen from the reservoir layer and uses this halogen to capture pollutants on its surface. This intermediary mechanism allows the system to maintain high removal performance while the reservoir layer controls the release rate, preventing excessive halogen leaching into the environment.
Solution Approach 2:
The sorbent polymer composite utilizes its porous structure to adsorb pollutants and accommodate controlled halogen release. The porous architecture provides large surface area for pollutant capture while allowing gradual diffusion of halogen from the reservoir, enabling sustained high removal performance without requiring high halogen release rates that would cause leaching problems.
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 system effectively maintains high removal efficiency for SOx, mercury vapor, and PM over an extended period without generating secondary pollutants, with a controlled halogen release that prevents leaching, thereby extending the operational life of the system.
Implementation Method 1
at least one permeation control layer is disposed between the first SPC layer and the halogen reservoir, between the second SPC layer and the halogen reservoir
Implementation Method 2
a sorbent polymer composite substrate... effectively maintains high removal efficiency for SOx, mercury vapor, and PM
Implementation Method 3
the articles described herein can allow for delayed release of at least one halogen source from a halogen reservoir
Data Source
AI summary
A durable pollution control systems, articles, and methods for removing multiple flue gas pollutants. The pollution control system can provide a source of halogen in the required amount for a prolonged period of time. The halogen source is combined with a sorbent polymer composite substrate, configured such that the halogen does not get leached away in solutions formed during the pollution gas treatment process.