Problems after the cooler is shut down
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After the cooler is shut down and steam is used for line cleaning, the circulating water must be completely drained; otherwise, pressure buildup will occur. Will pressure buildup happen if the circulating water is not completely drained? Very confused
Is the poster referring to that technical aspect? It should be explained clearly.
When a cooler is not in use for an extended period of time, all the cooling water inside it should be drained. The main purpose of this is to prevent various forms of chemical and microbial corrosion that can occur on the metal walls of the tubes. After the cooling water is drained, nitrogen should be introduced if possible to provide protection and prevent oxidation of the metal pipe walls by air. To drain the water accumulated in the low points of the heat exchangers and pipes, other media such as steam or nitrogen need to be introduced. Steam is introduced with caution to avoid pressure buildup, as the cooling water vaporizes when heated by steam, increasing its volume and thus raising the pressure in the pipes, which can lead to pressure buildup.
1. Prevent various forms of chemical corrosion and microbial corrosion caused by cooling water on the metal tube walls. 2. Prevent thermal expansion resulting from temperature increases (due to process heat transfer or environmental factors), which could damage the heat exchanger