Purolite Ion Exchange Design Calculation Program - The Best Free Software For Your

Ion Exchange Design – Hand calculation Brian Windsor (Purolite International Ltd) Introduction Before design programmes were introduced, every engineer had to calculate the design by hand using resin manufacturers data. Each engineer had their own way to carry out in their calculation. Before starting the design ideally you need to know some basic information: 1. Maximum / Average / Minimum flow rate and roughly how many hours per day the maximum flow rate is required (m 3/h). Daily requirement (m3/day) over how many hours.

Dec 28, 2012 - Design and Layout of Technology Components. Construction; Mr. David Larose of Purolite Ion Exchange Resins for technical assistance.

Design water analysis 4. Cation regenerant (sulphuric or hydrochloric acid) Flow rate 1. If the maximum demand is for a short period, or if there is a wide range of operating flow rates, then you can design the plant on the average demand and include a larger treated water storage to cater for the maximum flow rate or variations in demand. It is always to keep the plant in operation rather than operating on an “on-off” basis with lots of stopping and starting. Resins can operate over a range of flow rates, but the design of ion exchange columns is often very basic and many cannot accommodate very low flow rates. Poor distribution / collection is often encountered at low flow rates leading to channelling and poor performance.

Cycle Time / No of Streams The cycle time for each cation – anion pairing is determined by the water analysis, flow rate and number of streams. Where demineralised water is critical to the sites operation then normally the client will require a standby stream to cover for regeneration time of the other stream(s) and allow some basic maintenance. Most commonly encountered plants are therefore 2 x 100% or 3 x 50% duty, but where very high flow rates are encountered 4 x 33% duty and 5 x 25% duty streams have been supplied. A cation – anion pair can be regenerated in under 2 hours if simultaneous regeneration is employed and with short cycle plant it is even quicker. Mixed beds are more complicated, but are regenerated less frequently and usually take 2 to 3 hours.

Cycle Time / No of Streams Ignoring short cycle plants, then classical designs are often base on 8 or 12 hours on line between regenerations depending on the water analysis used for the design. Longer cycle times are encountered when the raw water TDS is low. Such thin waters often see plants designed on 24 hours on line or even longer. We will now select the basis for our design calculations. Design Analysis 1. Knowledge of the maximum and typical analysis is critical when choosing the cycle time. No point choosing short cycle time on the design analysis if the worst water has a much higher TDS.

This will mean the time between regenerations is too short. The analysis should balance i.e.

Ion Exchange Design – Hand calculation Brian Windsor (Purolite International Ltd) Introduction Before design programmes were introduced, every engineer had to calculate the design by hand using resin manufacturers data. Each engineer had their own way to carry out in their calculation. Before starting the design ideally you need to know some basic information: 1. Maximum / Average / Minimum flow rate and roughly how many hours per day the maximum flow rate is required (m 3/h). Daily requirement (m3/day) over how many hours.

Dec 28, 2012 - Design and Layout of Technology Components. Construction; Mr. David Larose of Purolite Ion Exchange Resins for technical assistance.

Design water analysis 4. Cation regenerant (sulphuric or hydrochloric acid) Flow rate 1. If the maximum demand is for a short period, or if there is a wide range of operating flow rates, then you can design the plant on the average demand and include a larger treated water storage to cater for the maximum flow rate or variations in demand. It is always to keep the plant in operation rather than operating on an “on-off” basis with lots of stopping and starting. Resins can operate over a range of flow rates, but the design of ion exchange columns is often very basic and many cannot accommodate very low flow rates. Poor distribution / collection is often encountered at low flow rates leading to channelling and poor performance.

Cycle Time / No of Streams The cycle time for each cation – anion pairing is determined by the water analysis, flow rate and number of streams. Where demineralised water is critical to the sites operation then normally the client will require a standby stream to cover for regeneration time of the other stream(s) and allow some basic maintenance. Most commonly encountered plants are therefore 2 x 100% or 3 x 50% duty, but where very high flow rates are encountered 4 x 33% duty and 5 x 25% duty streams have been supplied. A cation – anion pair can be regenerated in under 2 hours if simultaneous regeneration is employed and with short cycle plant it is even quicker. Mixed beds are more complicated, but are regenerated less frequently and usually take 2 to 3 hours.

Cycle Time / No of Streams Ignoring short cycle plants, then classical designs are often base on 8 or 12 hours on line between regenerations depending on the water analysis used for the design. Longer cycle times are encountered when the raw water TDS is low. Such thin waters often see plants designed on 24 hours on line or even longer. We will now select the basis for our design calculations. Design Analysis 1. Knowledge of the maximum and typical analysis is critical when choosing the cycle time. No point choosing short cycle time on the design analysis if the worst water has a much higher TDS.

This will mean the time between regenerations is too short. The analysis should balance i.e.