Continuous Ion Exchange Equipment
The CSEP® and ISEP® concepts comprise a mechanical and process methodology to efficiently bring into contact liquids and solids as two counter-current contacting streams. In the areas of adsorption and ion exchange, the commercial success of the ISEP® has been demonstrated repeatedly for over twenty years.
Continuous Separator Technology
At the heart of the system is a single, multi-port, rotating distributor containing 10, 20 or 30 inlet and outlet ports. The distributor rotates at a specified rate using only one moving part. The stationary portion of the distributor manages and directs all in-coming and out-going fluid streams into the appropriate zone and ports of the rotating portion of the distributor.
The rotating portion of the distributor draws process fluid streams from the stationary component and feeds the cells containing sorbent media. The media can be ion exchange resins, silica gels, activated carbon or molecular sieves, for example. The cells are mounted on a turntable that rotates along with the distributor.
During a 360° rotation, each resin cell is subjected to an entire sorption cycle. This cycle usually consists of adsorption, regeneration or elution, and one or two rinse steps. Additional steps may be provided depending on the process complexity.
The use of short beds allows for maximum resin utilization. No resin sits idle in the cells regardless of resin state
– exhausted or regenerated. This feature results in a much lower resin inventory than would be the case for a conventional ion exchange system. Counter-current regeneration and counter-current rinse water flow, along with low resin volume, combine to reduce the amount of chemicals and eluent required to regenerate and clean the resin.
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