Scale in cooling loop

Company: Hengstenberg, Germany

The problem
Sauerkraut and other food are packed in canes. This machine needs a constant cooling. The water they are using has a lot of calcium solved, which leads to the known problems of clogging to surfaces and pipes. This finally reduces the capacity of cooling. To minimize the
effects of the calcium, the water in the cooling loop was constantly replaced, in order to hold the concentration of the calcium in the cooling water as low as possible, under the point, where the calcium starts to fall out of the water and starts to crystalline.
This has lead to replacing app. 90m 3 fresh water per day.

How the problem was solved
One Merus®-Ring was installed in the cooling loop. Merus is increasing the solubility of the calcium inside the water. The result the concentration of calcium in the water can be far higher, until the calcium starts to build scale.

How the efficiency was checked by the client
Short after the installation of Merus, a lot of calcium was washed out of the system. In the sedimentation tank, a lot of sludge could be found. This sludge could be easily drained from the system.
After the self cleaning of the system, the set value of the conductivity where the water was automatically replaced was step by step increased. Parallel the cooling capacity of the system was checked. It was found out, that it was almost no need, to replace the water in the cooling loop anymore.
Today, there are added only 8m 3 of water. This is the amount which evaporates per day. So the client saves app. 80m 3 water per day.