Wet Scrubbers / NOx Scrubber Systems

NOx (Nitrogen Oxide) Wet Scrubber Systems oxidize and remove Nitrogen and Nitrogen Dioxide. 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.

Ecologix has two complete manufacturing facilities, one for Fiberglass and the other for PVC, CPVC and Polypropylene. We are able to provide all of our equipment such as Scrubbers, Fans, High Efficiency Mist Eliminators, Hoods and Duct in the best material suitable for your application. We will provide you a complete system from the hoods to ductwork to scrubber and fan. We can also completely automate your system with panels and controls such as level, pH, ORP, flow and pressure. We can completely install the system and provide field start up service.

NOx is a generic term for the various nitrogen oxides produced during combustion. They are believed to aggravate asthmatic conditions, react with the oxygen in the air to produce ozone, which is also an irritant and eventually form nitric acid when dissolved in water. When dissolved in atmospheric moisture the result can be acid rain which can damage both trees and entire forest ecosystems.

Definition of NOx and NOy in atmospheric chemistry
In atmospheric chemistry the term NOx is used to mean the total concentration of NO plus NO2. During daylight NO and NO2 are in equilibrium with the ratio NO/NO2 determined by the intensity of sunshine (which converts NO2 to NO) and ozone (which reacts with NO to give back NO2). NO and NO2 are also central to the formatio n of tropospheric ozone. This definition excludes other oxides of nitrogen such as Nitrous Oxide. NOy (reactive odd nitrogen) is defined as the sum of NOx plus the compounds produced from the oxidation of NOx which include nitric acid, peroxyacetyl nitrate and other compounds. In this context nitrous oxide and ammonia are not considered as reactive nitrogen compounds.