Heat Exchanger Unit Manufacturer: How to Clean Heat Exchanger Units
Release Time:
2020-09-21 15:02
Source:
Heat exchangers feature a standardized, modular design, are fully equipped, are easy to install and energy-efficient, and have been widely used in systems such as community centralized heating, domestic water supply, and industrial process water. The following describes how the equipment fares in acidic environments:
1 In the heat exchanger pickling process, the working principle of the heat exchanger is analyzed using the flushing solution, and then the concentration of the pickling flushing solution, the content of scale substances, and the content of iron ions are determined. The coupons are checked regularly, and the cleaning situation is determined by analysis to decide whether to continue supplying the cleaning solution.
2 If significant corrosion is present on the coupons, corrosion inhibitors should be added and the cause of the corrosion should be analyzed. In severe cases, the liquid should be drained immediately and rinsed. After normal cleaning and removal of the scale layer, the equipment should be rinsed with clean water while draining until the drained liquid is neutral.
3 Although the descaling effect of the alkaline cleaning method for heat exchangers is inferior to that of acid cleaning, it is safer. Alkaline cleaning generally uses steam cooking, i.e., boiling cleaning. 24 hours.
4 When using soda ash, the alkali concentration is 1 % 2 % when using caustic soda, the alkali concentration is 0.2 % 0.4 % when using sodium phosphate, the alkali concentration is 0.3 % 0.5 % After steaming, the fouling should be immediately washed away with water, otherwise the fouling will re-alkalize and be difficult to remove.
5 This method is mainly used to remove oil scale or scale caused by sulfates or silicates.
Heat exchangers have good performance, but once rust occurs, a relatively reasonable plan should be adopted before cleaning to avoid damage to the equipment.
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