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Why steam as the heat source?

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The article says that "Steam usually provides the heat required for the vaporization." Why? It seems like there ought to be plenty of other candidates as heat sources - so why steam? —BarrelProof (talk) 20:35, 29 May 2011 (UTC)[reply]

Refinerys and chemical plants usually have a steam system to meet process heating requirements. Condensing steam provides sufficient heat and temperature for most vaporization needs. However, there are instances where higher temparatures are required and a special heat transfer fluid like Dowtherm is used. Sandcherry (talk) 22:49, 29 May 2011 (UTC)[reply]

SVG version of Figure 1

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The SVG version of Figure 1 depicts the inlet line from the tower bottoms as being connected to the bottoms product outlet line ... which is wrong. One of the two lines should be broken at the crossing point (as in the original PNG version) to indicate that they are not connected.

The word "Bottoms" is practically touching the line ... which is poor practice. There should be more space between "Bottoms" (and "Product") and the actual line, again as in the original PNG version.

Replaced the SVG version with the original PNG version. mbeychok (talk) 17:36, 21 January 2012 (UTC)[reply]