A proprietary denitrification device from Mitsubishi Power which uses ammonia as a reducing agent is used in thermal power plants. Nitric monoxide (NO) and NH3 react and decompose to nontoxic nitrogen (N2)and water(H2O).
This denitrification device requires highly efficient control over denitrification to eliminate unreacted NH3 in consideration of environment and costs.
A prediction system for denitrification from Mitsubishi Power combines a proprietary prediction/control method for denitrification and a quick-response zirconia-based NOx (nitrogen oxide) meter to offer optimal control over NH3 supply when the load, NOx concentration, and other conditions fluctuate.
Response Time between Zirconia type and CLD
Appearance of Prediction
System of Denitrification
Example of basic measurement using a NOx sensor
Theory of operation of a NOx sensor
Theory of measurement of NH3, and that of NOx coexistent with NH3
System structure of the denitrification prediction system
The result of the response comparison test between the zirconia-based NOx sensor and the CLD type NOx sensor is as follows. Compared to the CLD type, response time has been successfully improved by about one minute.
The result of the response comparison test between the zirconia-based NOx sensor and the CLD type NOx sensor
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