Is ozone-based denitration better or ammonia oxidation-reduction method better for flue gas denitration?
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As the title indicates, it concerns the denitration efficiency; for NOX, we use ammonia and air at temperatures between 320–400 degrees to carry out redox reactions in an SCR catalyst, with the reaction being NO + O2 + NH3 → N + H2O. I am not familiar with the specifics of the ozone-based treatment method
I don’t think I’ve heard of the ozone process; is it used on an industrial scale?
The investment and operating costs of SICS (ozone process) are lower than those of SCR, and there is industrial application experience for both; the by-products of SICS are sulfuric acid, an*ao acid, and fertilizers
SCR should be more mature. In terms of secondary pollution, monitoring ammonia emissions may be easier than monitoring ozone emissions.
This post was last edited by karamay on 2017-8-1 13:03. Ozone is unstable and decomposes in less than 1 second, so there is no issue of ozone escaping.
1. Ammonia (SCR) is a reduction process, not an oxidation process. 2. The ozone oxidation method is good ； Because SCR generates sulfur trioxide, the chimney emits blue smoke and the particle levels are above the limit. The SCR method can clog and corrode the economizer. One disadvantage of the ozone oxidation method is an increase in ammonia nitrogen levels in the wastewater; this wastewater must be sent to an industrial water AO tank for ammonia nitrogen removal before it can be discharged directly.
1. Ammonia (SCR) is a reduction process, not an oxidation process. 2. The ozone oxidation method is good ； Because SCR generates sulfur trioxide, the chimney emits blue smoke and the particle levels are above the limit. The SCR method can clog and corrode the economizer. One disadvantage of the ozone oxidation method is an increase in ammonia nitrogen levels in the wastewater; this wastewater must be sent to an industrial water AO tank for ammonia nitrogen removal before it can be discharged directly.
Ammonia is used for desulfurization, while the ozone oxidation process for NOX generates *ao acid an.
SISC is simultaneous sulfur and nitrogen removal, both using ammonia