How to address high resistance in the final cooling tower
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The gas resistance in the final cooling tower is currently around 2000 pascals, which has affected the operation of the system. Previously, by raising the gas temperature, the resistance was reduced to around 1000 pascals; however, it is no longer possible to lower the resistance by increasing the temperature
Adding washing oil to the condensate can be used for cleaning, and it yields good results. The high resistance is mainly caused by the accumulation of naphthalene outside the root tubes of the final cooler.
There must be other substances on the tray; it’s okay to heat it at first, but as more deposits accumulate, you can try adding some xylene to see what happens
What causes high resistance? The right solution can be applied accordingly
There is a problem with the cleaning process of the primary cooling tower!
The cause must be analyzed based on the structure or design of the final cooling tower, and different measures should be taken accordingly. 1. The final cooling tower is a straight-cooling type packed tower; therefore, analysis is required regarding aspects such as the composition and flow rate of the spraying liquid, the cooling efficiency, and the packing. Measures can be taken including adjusting the composition of the spraying liquid (by adding crude benzene, water separated from crude benzene, washing oil, etc.), altering the method of spraying liquid replacement (by adjusting the amount of replacement fluid used or by implementing continuous replacement), and checking whether the packing is clogged (due to impurities that accumulate over time and cause blockages in the packing layer) ； 2. The final cooling tower is an indirect cross-tube cooling tower. It is recommended to first perform a steam purging of the tower after cutting off the air supply, in order to remove any deposits on the surface of the cooling tubes; thereafter, the spraying issue should be addressed by ensuring continuous spraying. It is also advisable to recycle the water separated from crude benzene into the spraying circulation fluid used in the final cooling tower. If the resistance still increases, it is possible to use cleaning oil for spraying on a regular basis. Generally speaking, it needs to be addressed based on the actual situation; imitation is not an option. First, the causes must be analyzed clearly, and then measures should be taken one by one to resolve them.
Why not use steam purging?
The terminal cooling tower has high resistance, mainly due to naphthalene blockages; it can be cleaned using steam, and generally two cleanings per year are sufficient