What are the reasons for high resistance in the heat exchanger inside the cold box? Please ask
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The outlet parameters of the molecular sieve are completely normal; what could be the possible causes of high resistance in the heat exchanger before the feed gas enters the nitrogen scrubber? Seeking advice from experts: lol
The gas is impure, and scaling occurs; plate heat exchangers are prone to scaling and blockage. We also use liquid nitrogen for cleaning; currently, we are working on the civil engineering work.
1. Filter penetration: Dust from molecular sieve adsorbents enters the cold box； 2. The nitrogen purging (dew point) prior to liquid accumulation in the cold box was unsatisfactory ； 3. If the previous steps were done correctly and the issue occurs during initial operation, it is likely that the purging was not thorough enough ； 4. If the pressure difference is increasing gradually, it could be due to CO2 entering the cold box, as there may also be problems with the analyzer; we have encountered this before ； 5. Additionally, molecular sieve adsorbents have a specific order of adsorption for H2O, CH3OH, and CO2, and the analysis items must correspond to this order ；