How to deal with the caking of the solid alkali plates in the solid alkali tower of the refining unit in a polypropylene plant
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Have there been any similar incidents reported by other users in polypropylene plants, where caking of the solid alkali plates in the solid alkali filler tower led to restrictions on the amount of propylene that could be fed, thereby preventing an increase in production capacity?； How to handle such problems in a limited and simple manner.
I think in this case, it’s time to replace the solid alkali
How long has the fixed-alkali tower been in use? How to determine if it is solid alkali caking rather than other causes? Also, is the solid-alkali tower effective for dehydration? How many PPM can it be reduced from?
It was used for 3 years; since the raw material propylene contained no free water, the purification effect was limited. The solid-alkali tower is only effective for free water and a portion of carbon dioxide (theoretically). The caking is due to propylene passing through the caustic tower, which significantly restricts the flow.
Since it’s not very effective, cut it out and discard it.
Is Caustic soda or bulk soda used for solid alkali? It can be handled by using barium carbonate