Dow Water & Process Solutions

Typical Troubleshooting Operations

This section provides details of typical troubleshooting operations like sampling and cleaning of various foulants.

Recording Plant Information and Operation Data
In order to be able to effectively assess the performance of the ion exchange unit, information on the plant and its performance should be recorded. The actual parameters then have to be compared with the original plant design figures.

Typical Problem Correction Operations
The following information is intended to help in identifying issues that may cause problems and guidelines are proposed that may help to prevent problems occurring.

• Preliminary inspection of vessel and equipment
• Preparation for resin loading
• Start-up
• Resin Sampling (602KB PDF)

Some Common Cleaning Procedures:

• Procedure for acid cleaning of mixed bed resins (17KB PDF)
  
• Brine cleaning of anion resins for organic contamination (69KB PDF)
  
• Calcium contamination on cation resins (65KB PDF)
  
• Calcium contamination on anion resins (67KB PDF)
  
• Disinfection for biofouling (26KB PDF)
  
• Iron removal from cation resins (19KB PDF)
  
• Iron removal from anion resins (17KB PDF)
  
• Polyelectrolyte fouling (17KB PDF)
  
• Oil fouling (17KB PDF)
  
• Regenerant quality guidelines (26KB PDF)
  
• Silica removal
  
  • Understanding silica removal by ion exchange (20KB PDF)
  • Preventing silica fouling of anion resins (22KB PDF)
• Layered bed anion de-mixing (17KB PDF)