In sugar factories, crystallizers and concentrators produce a large amount of steam drain, which is reused as boiler feed water.
However, sugar leaked during the boiler feed process can mix into this water. When that happens, the sugar can decompose into
an organic acid at high temperatures, thereby decreasing the pH of the water. If the boiler operates with water at a low pH level, it
can become corroded. The lowered pH needs to be raised to a normal level by performing a blowdown or the like, and the losses
potentially caused by this process are not necessarily small. The sugar solution leak must be quickly detected before a minor problem
turns into something much worse. For this reason, continuous monitoring is essential. |