| 摘要 |
<p>A method and apparatus for cooling a gas stream (15) is disclosed, comprising passing a gas stream over a plurality of thermally conductive baffles (40) arranged to be in thermally conductive communication with a liquefied gas, such as liquid nitrogen. As the gas (15) passes over the baffles (40), heat from the gas is conducted away from the baffles to the liquefied gas. Apparatus for treating contaminated particulate matter is also disclosed, comprising a rotatable inclined drum (110), arranged so that its inlet end (112) is located at a lower position than its outlet end (114). The drum has an internal vane (130) on its inner surface which conveys contaminated particulate matter (140) upwardly when the drum rotates. A means for creating a flow of air through the drum is provided along with a condenser (10) which condenses entrained contaminants from the flow of air exiting the drum.</p> |
