D.M.Plant. (De-Mineral Plant)
Demineralisation is the process of removing mineral salts from water by using the ion exchange process.
Demineralised water is water near about completely free of dissolved minerals
Demineralised water also known as De-ionised water. Deionisation is a physical process which uses ion exchange resins which provides ion exchange site for the replacement of the mineral salts in water with water forming H+ and OH- ions. Because the majority of water impurities are dissolved salts, deionisation produces a high purity water that is generally similar to distilled water, and this process is quick and without scale build up.
De-mineralization technology is the proven process for treatment of water. A D.M. Water System produces mineral free water by operating on the principles of ion exchange, Degasification, and polishing. Demineralised Water System finds wide application in the field of steam, power, process, and cooling.
Principle :
Raw water is passed via two bed filled (ion exchange resins). While the cations get exchanged with hydrogen ions in first bed, the anions are exchanged with hydroxyl ions, in the second one.
Process :
Ion-exchange is a rapid and reversible process in which impure ions present in the water are replaced by ions released by an ion-exchange resin. The impure ions are taken up by the resin, which must be periodically regenerated to restore it to the original ionic form.
The following ions are generally found in raw waters :
Cations
Anions
Calcium (Ca2+)
Chloride ( Cl-)
Magnesium (Mg2+)
Bicarbonate (HCO3-)
Sodium (Na+)
Nitrate (NO3-)
Potassium (K+)
Carbonate (CO32-)
Ion Exchange Resins :
There are two basic types of resin – cation-exchange and anion-exchange resins. Cation exchange resins will release Hydrogen (H+) ions or other positively charged ions in exchange for impurity cations present in the water. Anion exchange resins will release hydroxyl (OH-) ions or other negatively charged ions in exchange for impurity anions present in the water.
There are three ways in which ion-exchange technology can be used in water treatment and purification
1. Cation-exchange resins alone can be used to soften water by base exchange.
2. Anion-exchange resins alone can be used for organic adsorption or nitrate removal.
3. And combinations of cation-exchange and anion-exchange resins can be used to remove virtually all the ionic impurities present in the feed water, a process known as deionisation. Water deionizers purification process results in water of exceptionally high quality
De-Mineralisation / De-ionisation :
For many industrial applications, high-purity water is essentially free from ionic contaminants is required. Water of this quality can be produced by deionisation. The two most common types of deionization are :
· Two-bed deionization
· Mixed-bed deionization
Two bed de-ionisation :
The two-bed deionizer consists of two vessels – one containing a cation-exchange resin in the hydrogen (H+) form and the other containing an anion resin in the hydroxyl (OH-) form. Water flows through the cation column, whereupon all the cations are exchanged for hydrogen ions. The same principle applies when considering anion-exchange.
The de-cationised water then flows through the anion column. This time, all the negatively charged ions are exchanged for hydroxide ions which then combine with the hydrogen ions to form water (H2O).
Mix bed (MB) de-ionisation :
In mixed-bed deionizers the cation-exchange and anion-exchange resins are intimately mixed and contained in a single pressure vessel. The thorough mixture of cation-exchangers and anion-exchangers in a single column makes a mixed-bed deionizer equivalent to a lengthy series of two-bed plants. As a result, the water quality obtained from a mixed-bed deionizer is appreciably higher than that produced by a two-bedplant.
Although more efficient in purifying the incoming feed water, mixed-bed plants are more sensitive to impurities in the water supply and involve a more complicated regeneration process. Mixed-bed deionisers are normally used to polish the water to higher levels of purity after it has been initially treated by either a two-bed deionizer or a reverse osmosis unit. Mixed bed polishing produces a water with less than 0.1 micro Siemens per centimetre conductivity. With sophisticated design and appropriate resins, the conductivity of pure water (0.055 micro Siemens per centimetre) can be achieved. Residual silica values can be as low as 1 micro Siemens per centimetre
Life Technologist designed great quality of D.M.Plants .
Manual D.M. Water Plant (With Diaphragm Valves)
Manual D.M. Water Plant (With MPV- multi Port Valves)
Fully Auto D.M. Water Plant (Volumetric) (With Electronic Valves)
Capacity 500 LPH TO 500 Kl/Hrs
MOC SS/MS/MS Rubber Lined/ PP FRP
Feature
· With 5 /10 /20 Micron PP Filter
· With Sand / Carbon Filter
· Heavy Duty Shell / Vessel
· Proper Sampling Points.
· With / With out Skid Mounted
· Easy in operation
· No skill man power required
· Easy to relocate
· Plug & Play System
· Proven Technology.
· High quality design and materials of construction built to last
· Modular design capability for rapid mobilization and reduced field set-up cost
· Low maintenance – automated design and controls
· Reduced environmental footprint – low energy and chemical consumption
· Fully customizable to a variety of water sources and customer requirements
· Reliable
· Sustainable
· Economical
