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"Plate heat exchanger cleaning" process-disassembly and soaking

Views:　Date:2020-04-17
The cleaning methods of the plate heat exchanger are divided into two processes: online circulating cleaning and disassembly and immersion cleaning. Before cleaning, scale samples can be analyzed according to the quality of the circulating water and the corresponding cleaning process can be selected.
Today, Prepler mainly introduces the disassembly and immersion cleaning process of the plate heat exchanger:
1. After disassembling the plate heat exchanger, place them in order and make records;
2. Make heat exchanger cleaning pool;
3. Inject cleaning agent into the pool and add appropriate amount of water to dilute until the heat exchange plate is completely submerged, the dilution ratio is determined according to the dirt;
4. Start immersion cleaning, check the concentration and PH value of the cleaning agent in the cleaning tank every 1 hour, so that the concentration of the cleaning agent is always kept in a safe and effective range, and the PH value is maintained between 1-3, and according to Add appropriate cleaning agent to the test data;
5. When the concentration and pH of the cleaning agent do not change or the amount of change is extremely small within 2 consecutive hours, and the scale on the surface of the plate is obviously reduced, it can be gently brushed off with a plastic brush, and the cleaning process is ended;
6. After cleaning, rinse each plate with a water pipe;
7. Assemble in order, you can carry out a crushing test to check whether there is leakage in the replacement of the board. If there is any leakage, timely repair and treatment.
The disassembly and immersion cleaning process is suitable for the cleaning of scale and dirt. The descaling effect is relatively thorough, but the labor is relatively large, and the process is more complicated than the online cycle cleaning. It is easy to cause heat exchanger leakage and damage to parts After that, check the plate heat exchanger for leaks. When the scale of the plate heat exchanger is serious, the heat exchange efficiency is low, and even the blockage occurs, the disassembly and immersion cleaning method should be used.