Why can’t steam be used in chlorine vaporizers?
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Why can’t steam be used? Is it because the steam temperature is too high? 80-degree hot water is sufficient for use, so there’s no need to use steam of a higher temperature?
As long as the temperature is properly controlled, it is possible to use steam directly, but it is better to use hot water to exchange heat with the steam
Steam can be used. The guidelines on safety facilities and emergency response for chlorine state that, in point 3, it is recommended to use a coil-type or sleeve-type vaporizer for the complete vaporization of liquid chlorine; the vaporization temperature of liquid chlorine should not be lower than 71°C, with a recommended water temperature range of 75–85°C. A special vaporizer (steam-heated) is used, with the temperature not exceeding 121°C. The vaporization pressure is under interlocked control with the feed control valve, while the vaporization temperature is under interlocked control with the steam control valve.
Our factory uses hot water; there are five sets of units submerged in tanks, with the water temperature not exceeding 40 degrees Celsius. Steam is not allowed to be used – firstly, because vaporization occurs too rapidly and is difficult to control, and secondly, because it causes rapid corrosion of the vaporizers themselves. We have to replace them entirely every two years, regardless of whether they are damaged or not
Steam can be used, but a vaporizer made of special materials is required, such as Monel