Can a low alkali solution regeneration temperature (around 33°C) at the refining unit cause blockages in the air injection distributor?
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After the refining unit started operating, the air injection distributors in the alkali solution regeneration tower and the disulfide separation tower became clogged frequently, almost twice a day; this frequency was not as high before the unit stopped operating. The temperature for alkali solution regeneration is around 33°C, and the alkali concentration is 12–20%. Is this related to the regeneration temperature or the alkali concentration? Is it still because there are too many impurities in the alkali system at the start of operation, causing the alkali solution to become too dirty?
If the alkali solution is too dirty and the temperature is low, alkali precipitation is possible.
Generally, there are filters on the corresponding pipes. If the filter is working fine, it means that the operating temperature of yours is too low, causing the alkali solution to crystallize! You can take a look at the overall tower pressure drop for analysis!