| 摘要 |
<p>In a process and apparatus for reducing the sulfur dioxide content of a hot flue gas, it is known to bring a lime slurry into contact with the gas to remove sulfur dioxide therefrom and leave a highly liquid waste sludge product the disposal of which is a serious problem. In this invention, during the contact, the lime slurry flows from a scrubbing zone to a drying zone while the gas flows from the drying zone to the scrubbing zone, with the result that the waste sludge product is efficiently dewatered to a low moisture content by evaporation in the drying zone from the heat of the incoming flue gas and is thereby made easily disposable and exceptionally suitable for use as landfill.</p> |
