Reverse Osmosis antiscalant Configuration

Data

  1, water-input flow volume Q_f               unit: m³/h

  2, concentration of medicine filled D       unit: mg/L, g/ m³

  3, density of antiscalant p                 unit: kg/L

  4, Max. effect of pump Q_m                   unit:L/h

  5, actual effect of pump Q_t                 unit:L/h

  6, dilution times Z       

Filling method

  1, Raw medicine is filled in directly without dilution

Q_t = Q_f.D/(p.1000)

Actual example: A plant water-in volume is 200t/h, through calculating the raw water may be added in 3.2ppm, antiscalant will be filled in directly without dilution and its density is 1.15kg/L.

Q_t = Q_f.D/(p.1000)=200×3.2/(1.15×1000)=0.557L/h

Explanation: To option suitable pump based on its actual effect of Q_t =0.557L/h. Generally the actual effect Q_t is covering Q_m25%~90% of Max, effect of pump.

  2, Raw medicine is filled after dilution

  If proportion of medicine after dilution noted as 1.

Q_t/Z = Q_f.D/(p.1000)

Actual example: A plant water-in volume is 50t/h, through calculating the raw water may be added in 3.2ppm, antiscalant will be filled in directly without dilution and its density is 1kg/L.

Q_t /Z = Q_f.D/(p.1000)=50×3.2/(1×1000)=0.16L/h

Explanation: If the dilution times Z is optioned as 5 (commonly as integer less than 10, e.g. 2,4,5,10,,,,,), so actual effect of pump Q_t =0.8L/h, suitable pump is optioned.

Generally the actual effect Q_t is covering Q_m25%~90% of Max, effect of pump.

Adjustment on pump calculating

 Double adjustment: actual effect = Max. effect × stroke% × frequency %  (Frequency is commonly optioned as >50%.)

Single adjustment: actual effect = Max. effect ×stroke%

At site, for eliminating the bad effect from dilution medicine, it should raise medicine-add accuracy and reduce configuration times of medicine. Small measuring range pump may be optioned.

Effects Assessment on Reverse Osmosis Medicine