|Application||Forced Circulation Re-boiler Proprietary Process Liquid|
|Fouling Issue / Frequency||
A steam-heated evaporation system recovers a volatile organic from a heavy organic solution laden with foulants. A hard, black scale that was forming in the upper 25% of the tubes was forcing the plant to switch two parallel once-through rising film evaporators with a clean pair every four to five days. When asked to increase throughput and simplify operations engineers considered installing a 2100-sq-ft falling film evaporator (FFE) to operate in series with the existing rising film evaporators (RFE). Although the combination system was expected to run approximately 10 weeks between cleanings, a better solution was needed.
|Solution / Approach||
A fluidized bed heat exchanger used as a re-boiler for an evaporator system to recover a volatile organic (82 m2)
|Medium||Proprietary Liquid||Condensing Steam|
|Pressure||5 barg||11.4 barg|
|Condensing at 181.5oC|
|Flow||160 m3/h||788 m3/h|
|Number of Tubes||55|
|Length of Tubes||10.5 m|
|Diameter Tubes||47.5 mm|
|Particle Type||Stainless Steel|
|Particle Size||2 mm|
More than 20 years in operation.