A flash tank comprising: - an interior chamber defined by at least one wall; - a steam chamber supported within the interior chamber and engaged to a roof of the flash tank, said steam chamber being separated from the at least one wall by a distance, wherein said steam chamber comprises an upper steam chamber, a lower steam chamber, a partition to separate the upper steam chamber and the lower steam chamber, and a lower steam chamber inlet port in the partition to allow gas to flow from the upper steam chamber to the lower steam chamber, wherein the lower steam chamber defines an annular space containing overlapping baffles creating a tortuous path for an exiting steam, and wherein said lower steam chamber comprises an angled floor to permit the collection of condensed steam and a conduit for directing re-condensed liquid from the steam chamber to a level of liquid at the bottom of the flash tank for discharge through a liquid discharge port of the flash tank; - a steam inlet port connecting the interior chamber to the upper steam chamber to direct flash-evaporated steam from the interior chamber into the upper steam chamber; and - a gas discharge port connected to the lower steam chamber to discharge gas from the steam chamber after it has passed through the tortuous path. - an interior chamber defined by at least one wall; - a steam chamber supported within the interior chamber and engaged to a roof of the flash tank, said steam chamber being separated from the at least one wall by a distance, wherein said steam chamber comprises an upper steam chamber, a lower steam chamber, a partition to separate the upper steam chamber and the lower steam chamber, and a lower steam chamber inlet port in the partition to allow gas to flow from the upper steam chamber to the lower steam chamber, wherein the lower steam chamber defines an annular space containing overlapping baffles creating a tortuous path for an exiting steam, and wherein said lower steam chamber comprises an angled floor to permit the collection of condensed steam and a conduit for directing re-condensed liquid from the steam chamber to a level of liquid at the bottom of the flash tank for discharge through a liquid discharge port of the flash tank; wherein said steam chamber comprises an upper steam chamber, a lower steam chamber, a partition to separate the upper steam chamber and the lower steam chamber, and a lower steam chamber inlet port in the partition to allow gas to flow from the upper steam chamber to the lower steam chamber, wherein the lower steam chamber defines an annular space containing overlapping baffles creating a tortuous path for an exiting steam, and wherein said lower steam chamber comprises an angled floor to permit the collection of condensed steam and a conduit for directing re-condensed liquid from the steam chamber to a level of liquid at the bottom of the flash tank for discharge through a liquid discharge port of the flash tank; - a steam inlet port connecting the interior chamber to the upper steam chamber to direct flash-evaporated steam from the interior chamber into the upper steam chamber; and - a gas discharge port connected to the lower steam chamber to discharge gas from the steam chamber after it has passed through the tortuous path.