Rich Amine Stream
When the amine system is extremely contaminated (high CO2/H2S ration) filtration of the rich amine exiting the absorber may be required. The concern is that FeS in the Rich amine can dissociate in the regenerator under certain conditions to soluble iron compounds which lean side filtration will not remove.
In order to prevent filter elements from clogging and to secure fine filtration efficiency, the concept of pre-coat filtration is used: Filter elements are protected by depositing a layer of pre-coat material on their surface, prior to filtration. In order to obtain a layer of pre-coat material, liquid with pre-coat material is introduced into the filter vessel, filtered and returned to the pre-coat tank. The pre-coat solution is prepared by mixing uniformly a part of the inlet Lean amine solution with the pre-coat material, which can be cellulose or diatomaceous earth. The proper selection of the pre-coat media is a key factor for successful operation and performance achievement of the filtration unit.
TPF offers a mechanical pre-coat type filter, to remove solid particles from the solution. In particular, two different types of mechanical pre coat filters can be supplied depending on client’s specific requirements:
- Self Cleaning Candle Filter
- Self Cleaning Vertical Leaf Filter