Commonly installed in various fired heaters, steam methane reformers, and natural gas applications in the Agrochemical, Petrochemical and Oil and Gas industries, IGS® Fine Particle Screens remove fibrous particles such as refractory fibers and insulation fibers from the flue gas prior to reaching the Selective Catalytic Reduction (SCR) reactor. This prevents the particles from building up on the catalyst layers which can cause production limitations, equipment damage and a reduction in efficiency and NOx removal.
Selective Catalytic Reduction (SCR) reactors are used in the chemical, petrochemical and oil and gas industries to reduce nitrogen oxide (NOx) emissions from flue gases. Fine particle screens play a role in protecting the SCR by preventing the entry of particulate matter and contaminants that can negatively impact their performance. Here’s how they provide protection:
Fine particle screens are installed at the inlet of the SCR to filter out solid particulate matter present in the flue gas. The screens have a fine filtration mesh that captures and retains fine particles including refractory fibers and dust.
The fine particle screen system then employs a robust online air cannon cleaning system that removes the captured particle from the screen face and sweeps them into a collection area, preventing the particles from re-entering the flue gas stream.
An SCR catalyst is used to facilitate the chemical reactions that convert nitrogen oxides into nitrogen and water vapor. The catalyst is typically composed of materials such as titanium dioxide or vanadium pentoxide. Fine particle screens act as a barrier to protect the catalyst from fouling. This is crucial for maintaining the SCR reactor’s efficiency and longevity.
Fine particle screens facilitate easier maintenance and performance optimization of SCR reactors. By capturing and retaining particulate matter, the screens prevent it from accumulating within the reactor and on the catalyst surface. This reduces the frequency of cleaning and maintenance required for the SCR system. Additionally, cleaner operation and reduced fouling improve the overall performance and effectiveness of the SCR reactor in NOx reduction.
The design and specifications of fine particle screens for SCR protection vary based on the specific requirements of the system, including the type of fuel, SCR catalyst design, the flue gas composition, and the particulate matter characteristics.
Reliable and durable mesh material
Extensive experience in fine particle screen and SCR installations
Custom-build panels for any fine particle screen system
Online cleaning of fine particle screens and system optimization
If you’re facing challenges such as poor DeNOx performance, system derates, forced outages, high pressure drop, ammonia slip, or material accumulation, we can help. Contact us today to discuss your specific requirements and learn how our SCR performance solutions can optimize your system, improve efficiency, and ensure compliance with environmental regulations.