Ion Exchange Column Design Calculations

Ion exchange dm plant calculations.

Ion exchange column design calculations.

As you can see from the calculations of v max saturation occurs first for chloride when 60 l of water has been treated. The diameter and depth. H d should be in the range 2 3 to 3 2. As a consequence this calculator only gives you an indication about the different parameters that are necessary to design an ion exchange water treatment installation.

Ce qe ce qmax 1 bqmax where qe mg g 1 is. Strong acid cation resin ion exchange resin that will readily give up a proton over a wide ph range. 137 m 3 hr 20 hrs. This calculator helps you with the design of a ion exchange installation.

Presently our ionic load is lower by 40 than design. Strong base anion resin ion exchange resin that will readily give up a hydroxide ion if the ph is less 13. The calculator is based on the following process. Ion exchange design hand calculation.

The design column flowrate will be 378 500 l d the allowable breakthrough time is 7 days of flow and the resin depth is approximately twice the column diameter. It is assumed that the breakthrough capacity remains the same. So if you don t want to have chloride in your water you have to stop the ion exchange system or if you have a duplex system you can switch to the other column available and regenerate the column that is saturated with the absorbed ions. The calculations are made using theoretical equations.

Ion exchange column design assumptions. Each unit with a capacity of 120m3 hour average breakthrough capacity of 2 17 mg g 1606 mg l at 20 cm bed height is used for calculation for different bed heights. Packed bed columns are particularly useful as they offer a compact and economical design and very good treated water quality. Because proper time should be given to exchange ions for that you have to change the height of column.

The ammonium concentration of permeate is 0 14 mg l. The optimum column diameter must be a balance between the resin bed height the ratio of resin height to diameter h d and the linear velocity. They are normally sized for relatively short cycles. Using the kinetic approach to column design determine.

The langmuir isotherm is a commonly used model to calculate the adsorption capacity of an adsorbate as described by the following equation. The design of the vessels should give a maximum resin bed depth while limiting the pressure drop across the resin bed to 1 bar. Except for very small ion exchange units and for de alkalisation with a wac resin only plants should always be designed using reverse flow regeneration.