Abstract: A mist recovery apparatus recovers a mist of water, oil and the like from an exhaust gas produced in the rolling operation of aluminum plates. The apparatus has a shell provided with upper and lower pipe plates and a plurality of exhaust passing pipes extending between the upper and lower pipe plates and, each pipe having a twisted strip therein. The shell has an upper casing and a lower casing, which are respectively placed above the upper plate and beneath the lower plate. The exhaust gas containing a mist flows through the upper casing, exhaust passing pipes, and the lower casing sequentially. These exhaust passing pipes are cooled by a coolant passing around the pipes, so that the mist is removed from the exhaust gas and recovered. The experimentally suitable ratio of the length (L) of the exhaust passing pipe to the twisting half pitch (P) of the twisting strip is from 8-35.

Abstract: A mist recovery apparatus is provided, which comprises a casing, an upper pipe plate and a lower pipe plate, a number of exhaust passing pipes each having a twisted plate therein, apertures formed at the side part of the casing to permit a cooling air flow to pass through the casing along the direction perpendicular to the exhaust passing pipes, a fume supply duct connected to the upper portion of the casing, and an exhaust duct disposed upwardly from the lower portion of the casing to the side of the casing so as to pass the exhaust from the exhaust passing pipes along the side of the casing and discharge the exhaust out of the casing. In such a structure, the mist contained in the exhaust produced from, for example, a rolling mill can be effectively separated and recovered and evolution of white smoke or fumes is greatly reduced. In order to achieve a more sufficient mixing of the exhaust and the air, a vertical chamber may be provided onto the discharge duct.