Process for removing SO3/H2SO4 from flue gases
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United States of America Patent
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Oct 12, 2004
Grant Date -
Jun 10, 2004
app pub date -
Dec 5, 2002
filing date -
Dec 5, 2002
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Abstract
A process of using sodium carbonate and sodium bicarbonate solutions to remove SO.sub.3 and other acidic gases or vapors from a flue gas without substantially decreasing the amount of sulfur dioxide also present in the flue gas. Very limited quantities of such solutions are injected into the flue gas in a manner that achieves a controlled droplet size, such that the solution dries on contact with the flue gas and the resulting dry particles of sodium carbonate/bicarbonate are sufficiently small as to have adequate surface area for reacting with SO.sub.3, as well as any H.sub.2 SO.sub.4 and, to some extent, HCl vapors in the flue gas.
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