Two types of cooling chillers are used in soap industry. Both type are close cycle chillers because the cooling liquid is always the same:
This type of Chiller work with a temperature in a variable range of +10 / +15°C. This chiller is used to cool the Roll Mill and the Soap Plodders. The heating generated by the friction between the soap and the rolls / screws is usually to decrease the production rate. The Chiller is used to grant a constant cooling that means a constant production rate for soap roll mill and soap plodders.
Usually the cooling liquid is a mixture of 90% of water and 10% of Glycol.
This type of Chiller work with a temperature in a variable range of -15 / -25°C. This chiller is used to cool the die-set (moulds) of the soap presses. A soap press gives the required performances when the die-set are frozen. Without the chiller, the stamped soap bars stick on the die-sets and it is very difficult to remove them from the dies. The scope of the chiller is to facilitate the soap bars extraction from the die-set without to damage the surfaces of the stamped soap bars.