A NOVEL SYSTEM OF DESALINATION OF INDUSTRIAL EFFLUENT OR SALINE WATER TO INDUSTRIAL GRADE REUSE OR FOR POTABLE QUALITY

摘要

Desalination is an important process to meet increasing demands of salt free water. Desalination in the current scenario is met by 1) Evaporation (solar or mechanical) 2) freezing 3) ion exchange 4) Electro Dialysis 5) Reverse osmosis 6) Nano filtration 7) Electrostatic separation etc. Most of the above systems suffer the limitation of higher equipment, energy and operational cost. With increasing pollution problems, a simple, appropriate and economical technology will solve this problem of desalination / TDS removal from water. The invention describes a simple desalination system comprising of the following components. 1) Blower unit (for withdrawal of atmospheric air) 2) Heat exchanger unit (to provide heat energy for evaporation) 3) Salt water atomizer unit (to generate air water dispersion) 4) Heat reaction chamber (to provide time for salt cracking) 5) Gas expansion unit (to enhance easy separation of salt) 6) Stationary salt arresting damper units in sequence (to separate solid salt) 7) Optional sand crystal/silica gel bed (final separation of solid salt). 8) Cooling tower / condenser unit for salt free water (to convert air-water vapour to liquid water). 9) Pure water collection unit (for storing pure water from cooling system). The principle is, air atomised evaporation of saline water using heat energy. Salt is best separated in solid form is hot air dispersion. The cracked salt crystals are separated by a novel, simple surface adsorption mechanism and the residual air-water vapour is condensed or cooled to deliver salt free pure water. The invention presented in the patent application relates to a simple and economical means by desalination of water and provides scope for alternate technology adaptable for industrial, domestic and agricultural needs and provide excellent alternate scope to counter TDS pollution.