The CONESEP® system is a fully automated process allowing superior resin separation to be achieved without operator intevention. This proprietary system has proved extremely reliable and can be easily retrofitted into existing condensate polishing plants. The automated sequence covering resin removal, cleaning, separation and regeneration is described below.
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Exhausted, mixed resin is transferred to the resin separation/anion regeneration vessel. A small amount of mixed resin isolated during the previous regeneration is added from the resin isolation pot. The resins are backwashed and air scoured to remove particulates. |
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The resin is backwashed again without air scour and the denser cation resin sinks to the bottom of the vessel. The interface is visible through a sight glass in the vessel. |
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Carbon dioxide is carefully injected into the vessel and the resin transfer line is opened. The cation resin flows into the second vessel. The unique cone design of the vessel bottom gradually reduces the diameter of the resin interface and directs it into the outlet branch. |
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As the resin interface moves into the transfer line, the difference in conductivity between the resins is detected. The transfer line is closed and the small amount of resin in the line is diverted to the interface isolation pot. A back-up optical cell detects the interface by colour difference in the unlikely event of the conductivity cell failing. |
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The cation and anion resins are regenerated simultaneously and rinsed to drain. Any cation resin still in the anion is now very dense and settles at the bottom of the vessel. This resin is then transferred to the interface isolation pot to achieve the quoted cross-contamination levels. |
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The regenerated anion resin is transferred to the cation regeneration/mix and hold vessel, the two resins are rinsed to final quality, and then transferred back to the next available polisher service vessel. |