Ammonia Scrubber Monitoring

Ammonia is a pollutant produced in different industrial processes as Denox plant, semiconductor industries. Its monitoring is often not required by the international laws. In many industries is needed the removal for this compound and for this reason is very important to find a reliable way to monitor the scrubber efficiency and so the real capacity of ammonia removal, in order to help the engineering to better define this type of filters and to reduce the emission of a compound that could create problem to the public health.

Monitoring for ammonia has become an important CEM issue for de-NOx systems. Ammonia is injected into stack gases where it reacts with NOx to form N₂ and H₂O. Usually this is done in conjunction with a catalyst bed to improve the efficiency of conversion, but non-catalytic systems are also being used. This process is not 100% efficient, whether or not a catalyst is used. An excess of ammonia provides the greatest conversion, but leads to the release of ammonia to the atmosphere. This release is known as ammonia slip. Aside from the economic aspects of "wasting" ammonia, concerns have been raised over the pollutant effect of this release. The ability to monitor for ammonia also allows control systems to compensate for fluctuating levels of NOx, and to monitor the aging characteristics of catalysts.

ETG has developed a complete turnkey system that is able to monitor this difficult compound, permiting remote calibration and remote troubleshooting.

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Ammonia Scrubber Monitoring.

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