|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)
|Condensing at 181.5oC
|Number of Tubes
|Length of Tubes
More than 20 years in operation.