| 摘要 |
<p>PURPOSE:To prevent damage from chemicals in by-products by treating exhaust gas contg. NOX and SOX with NH3 and radiation by adding fly ash to the by-products before or after recovery with a dust precipitator. CONSTITUTION:Exhaust gas contg. SOX and NOX generated in boiler equipment 1 enters a cooling tower 3 through a duct 2 and is introduced into a reactor 7. NH3 is added to the exhaust gas from an NH3 adding device 6 and electron beams are projected from electron beam generators 9 to produce ammonium sulfate and ammonium nitrate, which are then recovered with an electrostatic dust precipitator 11. At this time, fly ash is added to the by-products from a duct 18 before recovery or to the recovered by-products to adjust pH to 6-7, so as to prevent damage from a sulfamic acid compd. in the by-products.</p> |
