N2
+ H2OThe most effective method of post-combustion of NOx reduction is SCR. This technology routinely removes up to 85% of NOx and can be pushed to a higher removal efficiency. The gas velocity is reduced in an expanded section of ductwork, ammonia carefully metered ino the gas stream and balanced to match the distribution of NOx across the duct. The gas stream then passes across a special catalyst designed to cause a reaction between the NOx and ammonia, resulting in their conversion to nitrogen and water vapor.
CO Reduction
Because high NOx reduction requirements are often accompanied by CO abatement regulations, PPC offers optional CO catalyst combined into the SCR system. CO reduction catalyst can be integrated into the SCR with very little space requirement.
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Ammonia Injection Equipment is plate or skid Mounted for fast, easy field installation.
Combination systems
PPC provides SCR and CO catalyst beds that are integrated into the dry electrostatic precipitator (ESP) design. This provides several advantages:
- Separate support steel
is often not required.
- The hot side electrostatic
precipitator (ESP) removes
up to 95% of the particulate
matter allowing the
same reduction with
less catalyst and a
longer catalyst life.
- The ESP removes metallic
salts that can poison
the catalyst.
- The precipitator conditions
flow and distribution
of the flue gas for
the NOx and CO catalyst
chamber.
- Single point responsibility
for the system.
- Economical design that incorporates particulate control in combination with CO and NOx control.
