Lime scale washed out from a closed cooling loop
Company: Hengstenberg, Germany
Sauerkraut and other food are packed in canes. This canning machine needs a constant cooling. As feed water, untreated bore well water is used, which in this case has a lot of calcium solved. This calcium leads to the known problems of clogging of surfaces and pipes. A clogged or almost close system, reduces the flow of water as well the heat transfer from the water to the machine. This finally reduces the capacity of cooling. To minimize the effects of the calcium, the water in the cooling loop was constantly replaced or blowed down. In order to hold the concentration of the calcium in the cooling water as low as possible, at best case under the saturation point, where the calcium starts to fall out of the water and starts to crystalline and form incrustations.
One Merus®-Ring was installed at this open 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.
Short after the installation of Merus, a lot of calcium was automatically washed out of the system. This can be seen at the pictures below, where the drain was opened and lot of sedimented scale was washed out. In the sedimentation tank,a lot of sludge was found. This sludge could be easily drained from the system.