What is NOx ?
NOx forms when the levels of oxygen are high on the NO2 scale.
Oxides of Nitrogen generate two forms of gas phase emissions.
Nitrogen Oxide (NO) which is a colorless gas that is not soluble
in water.
Nitrogen Dioxide (NO2) is a visible gas (yellow/orange in color)
and has a limited solubility in water. High NO2 loadings are generated from processes using nitric
acid in metal finishing, metal refining and chemical nitration.
When concentrations of both NO & NO2 are significant, a multi-stage
scrubber system is required to achieve no visible emissions from
the scrubber stack.
The first stage would be required to oxidize the NO to NO2
and the second stage for NO2 removal. The oxidation of NO takes
place
in the first stage with chemical injection into the scrubbing
liquor as an oxidizing agent. To achieve complete oxidation
of all NO,
scrubber units are designed with high liquid re-circulation
rates, lower than normal gas velocities & extended packed beds.
NO2 removal occurs in second stage with more chemistry introduced
into the scrubbing solution as a reducing agent. The second stage
removes the oxygen from the NO2
molecule leaving only nitrogen and there by eliminating any visible emissions.
TYPICAL APPLICATIONS
- Aluminum Anodizing
- Bright-Dip
- Chemical Nitration
- Metals Refining
- High Alloy Steel Etching
VANAIRE QUALITY & PERFORMANCE GUARANTEE
Vanaire has over
thirty years experience in the air-pollution control industry
and can design, manufacture and deliver a first
quality NOx scrubber system
that is guaranteed to achieve the highest efficiencies with no visible
stack emissions. Vanaire equipment is manufactured to the highest quality standards
from materials such as PVC, CPVC, Poly-Propylene, solid FRP or
dual laminate.
For more information please contact us at 1-800-743-3553, or
on the web at info@vanaire.com.
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