How to remove fouling from petrochemical heat exchangers?
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The following are photos of the same equipment (the residue oil heat exchanger tube bundle) from different angles; as a result, the efficiency of this heat exchanger is very low toward the end of the plant’s maintenance period. What methods can be used to remove coking?
Coking in petrochemical heat exchangers can be removed through chemical cleaning, mechanical cleaning, or high-pressure water jet cleaning. In practice, an appropriate method can be selected based on the degree and characteristics of the coking material. For example, using chemical cleaners to dissolve coked substances, or directly flushing the dirt inside the pipes with a high-pressure water gun. Before carrying out cleaning, it is best to first conduct a thorough inspection of the equipment and a safety assessment. .
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The cleaning method should be changed from passive to active handling. For physical control, it is best to first remove impurities before entering the cooler. A filter can be installed to reduce impurities entering the cooler. Process control involves properly regulating the temperature of the material entering the cooler as well as the temperature of the cooler itself, in order to reduce coking. For reference.