Regarding flue gas desulfurization, what is the typical removal rate for SO3? What are the issues related to testing, and how is SO3 in flue gas emissions measured?
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As the title suggests: Belco technology is commonly used for EDV wet flue gas desulfurization, which involves the reaction of alkali solutions with SO2. So, can SO3 in flue gas be removed, and what is the removal rate? How is SO3 in the exhaust gases detected? Do the online analysis instruments used for this purpose measure SO2 instead? Is it effective against SO3? Why are blue flue gases (containing SO3) considered acceptable emissions? How to explain it? Manager Discussion Group
It depends on the type of nozzle you choose; different nozzles result in different removal rates for sulfur trioxide. The online instruments are used to measure sulfur dioxide, but not sulfur trioxide. **It seems there are no regulations set for the emissions of sulfur trioxide.**
There are no emission limits for sulfur trioxide, so very little should be removed. You can tell the amount of sulfur trioxide emitted by looking at the color of the exhaust fumes; a blue color indicates a high level of emission, and this is closely related to the amount of CO used as an oxidizing agent in the regenerator. It is best to adjust the regeneration process to use less flame retardant. The sulfur trioxide content will decrease.
Generally, in the case of flue gas catalysis, the molar mass ratio of SO2 to SO3 remains around 10:1. In terms of the EDV process, SO2 is removed in the washing stage, while SO3 is removed in the filtration stage. If blue smoke is emitted from the chimney, it indicates that the removal efficiency in the filtration section is poor. The main reason is that the flue gas linear velocity is too low, resulting in insufficient acceleration at the venturi. As for the solution? We can discuss it together.