Vertical bayonet vaporizers

FIG. V-15 Vertical bayonet vaporizer dimensions. (Source Armstrong Engineering Associates.)... 

The most prevalent type of vaporizer for this purpose is the vertical bayonet. The main point to consider is whether there is a likelihood of damming or stoppage of the condensate inside the tube at a time when surrounding liquid is below 32°F (0°C). In that event, freezing is a danger and in such times, the antifreeze aspect of the vertical bayonet vaporizer becomes desirable. 

The vaporization of chlorine tends to be a small-scale process, usually less than 180 tpd (P9). The unit shown is a steam-heated vertical bayonet exchanger, and the drawing follows Typical Flow Schematic 3 of Pamphlet 9. This pamphlet shows a number of other arrangements, but the gas side is the same in all cases. The following paragraphs describe the functions of these devices. 

Vertical vaporizer ( vertical bayonet ) It is widely used for chlorine, ammonia, propane, methanol, sulfur dioxide, etc. Sizes range from 50,000to 15,000,000 Btu/h (12,500 to 3,750,000 kcal/h). Veiy compact, hi productivity, easily combined with built-in superheater with common control. Many heating media can be used, including steam, hot water, and heat transfer fluids such as Dowtherm, Therminol, etc. Electric heated vaporizers also available. Small footprint. (See Fig.V-7.)... 

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