二四六天空彩选好资料

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Tube scale oil cooler scale cleaning

Source: http://le-signal.com/ Time: 2018-08-13

Tube-type oil cooler cleaning:
1. Physical cleaning method: The fixed tube sheet type can be washed with a water pump brush. If it is a core-pumped type, that is, a floating head type, the tube bundle can be pulled out and washed;
2 Chemical cleaning: Method After the scale has changed from loose to dense and hard, mechanical cleaning can no longer be used to remove the scale. At this time, pickling should be used. Hydrochloric acid can easily dissolve calcium carbonate and magnesium carbonate scales without preheating, so the pickling solution is generally a normal temperature hydrochloric acid solution. Although pickling can loosen scales and restore the normal state of the cooler surface, hydrochloric acid has a corrosive effect on cooling copper pipes. In order to protect the cooler tube wall from hydrochloric acid, additives must be added to the pickling solution, that is, substances that strongly retard the metal dissolution process. The additive we choose is benzotriazole, which is BC-801 water stabilizer, and the concentration is about 3%. According to experience, if mechanical cleaning can be performed on time, pickling can be performed once in 2a-3a; otherwise, pickling must be performed once a year.

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