INTRODUCTION:
In desalination, there are four types of process which are commercially available i.e. Multi-Stage Flash (MSF) desalination, multiple effect distillation (MED), MED with Vapor Compression (VC) and reverse osmosis (RO) or membrane based desalination. The major difference between these processes consists of their different input energy requirements. For MSF, MED and MED-VC the input is ‘thermal energy’ which could be steam or hot water. For RO or membrane based desalination the input energy is ‘electrical energy’.
DEMONSTRATION PLANT:
NETRA has developed, designed and setup a 1,20,000 LPD ‘Flue Gas based Sea Water Desalination (FGSWDeSal) plant at Simhadri. This plant is first of its kind in India and is in successful operation since February 2017. Salient details of the FGSWDeSal is as under
a) Capacity of Plant: 1,20,000 LPD
b) Thermal Rating of Plant: 500 kW-Th (approx)
c) Technology: (i) Desalination: Multi Effect Distillation; (ii) LP Steam: Flash Steam Generator in conjunction with Flue Gas Heat Exchanger
d) Plant Input: (i) Waste Flue Gas from ID Fan outlet; (ii) Hot CW from condenser outlet; (iii) Cold CW from condenser inlet
e) Gain Output Ratio (GOR): ≥ 6
f) Output Quality: TDS > 5 ppm
g) Foot Print: 250 sq.mtr (approx)