In counter current pattern at every cross section of equipment has nearly same value of temprature diffrence unlike co-current pattern where at every cross section tempr difference vary by great value thats make avg. lower value .
Fouling is due to suspended solid which get cling with operational object without any chemical reaction. Like clay, sand
Scaling is due to desolve solid like calsium , magnesium which get react with operational object.
Nelson complexity index is the representation of refinery downstream processing unit complexity. In simple terms, after crude distillation, more the number of downstream units, higher the complexity index. Higher complexity refineries produces more value added products.
Nice blog, I think packed column is better than plate column.It plays vital role in chemical packing and distillation column. According to my knowledge finepac is best Column Packing manufacturer in world.