Studies on the ammonium salts collection of SO2 removal with dielectric barrier discharge

Removal of SO/sub 2/ by thermal chemical method cannot be applied due to low collection efficiency of ammonium salts and unstable products. Using the new technology of dielectric barrier, the activated particles of high-concentration and high-energy are produced by the strong ionization discharge in the plasma reactor, so that SO/sub 2/ is oxidized to produce H/sub 2/SO/sub 4/ and further to form stable solid particles of (NH/sub 4/)/sub 2/SO/sub 4/ after thermal chemical reaction with NH/sub 3/. A large number of the solid particles of ammonium sulfate are collected in an electrostatic precipitator (EP). As a result, the collection efficiency of SO/sub 2/ is up to 88%, the removal efficiency is above 90%, and the energy consumption is less than 9.0 Wh/Nm/sup 3/. Therefore, the SO/sub 2/ removal of high effective dry method is realized. With this method, the one off investment of removal of SO/sub 2/ is decreased greatly, and the expenses for the additive NH/sub 3/ and the electricity are offset by the profits of the collection of ammonium salts.