Envicare Technologies Pvt Ltd

Demineralization is the process of removing mineral salts from water by using the ion exchange process.

• Distillation 
• Deionization 
• Membrane filtration (reverse osmosis or nanofiltration) 
• Electrodyalisis 
• Or other technologies.

Demineralized water also known as Deionized water, water that has had its mineral ions removed. Mineral ions such as cations of sodium, calcium, iron, copper, etc and anions such as chloride, sulphate, nitrate, etc are common ions present in water. Deionization is a physical process which uses specially-manufactured 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, deionization produces a high purity water that is generally similar to distilled water, and this process is quick and without scale buildup.
De-mineralization technology is the proven process for treatment of water. A DM Water System produces mineral free water by operating on the principles of ion exchange, Degasification, and polishing. Demineralized Water System finds wide application in the field of steam, power, process, and cooling.

 

Raw water is passed via two small polystyrene bead filled (ion exchange resins) beds. While the cations get exchanged with hydrogen ions in first bed, the anions are exchanged with hydroxyl ions, in the second one.

 

The following ions are widely found in raw waters :

Cations Anions Calcium (Ca2+) Chloride ( Cl-) Magnesium (Mg2+) Bicarbonate (HCO3-) Sodium (Na+) Nitrate (NO3-) Potassium (K+) Carbonate (CO32-)

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.

The application of ion-exchange to water treatment and purification. There are three ways in which ion-exchange technology can be used in water treatment and purification :

first, cation-exchange resins alone can be employed to soften water by base exchange; secondly, anion-exchange resins alone can be used for organic scavenging or nitrate removal; and thirdly, combinations of cation-exchange and anion-exchange resins can be used to remove virtually all the ionic impurities present in the feedwater, a process known as deionization. Water deionizers purification process results in water of exceptionally high quality

For many laboratory and industrial applications, high-purity water which is essentially free from ionic contaminants is required. Water of this quality can be produced by deionization.The two most common types of deionization are :

• Two-bed deionization
• Mixed-bed deionization

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. To keep the water electrically balanced, for every monovalent cation, e.g. Na+, one hydrogen ion is exchanged and for every divalent cation, e.g. Ca2+, or Mg2+, two hydrogen ions are exchanged. The same principle applies when considering anion-exchange. The decationised 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).

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-bed plant. 

Although more efficient in purifying the incoming feedwater, mixed-bed plants are more sensitive to impurities in the water supply and involve a more complicated regeneration process. Mixed-bed deionizers 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.

Electrodeionization Systems remove ions from aqueous streams, typically in conjunction with reverse osmosis (RO) and other purification devices. Our high-quality deionization modules continually produce ultrapure water up to 18.2MW/cm. EDI may be run continuously or intermittently

• Boilers feed water, Textiles, Pharmaceuticals, Chemicals, Breweries, Swimming pools, Potable Water, Hospitals, Automobile, and
   Battery, Fertilizers. 
• Ion Exchange Plants 
   - Softener
   - Industrial DM Plant
   - Two Stage & Multi Stage DM Plants
   - Mix Bed Demineraliser
   - De-Gasifiers
   - Cation Polisher
   - Manual/Automatic Plants
   - Pharmaceutical Industry
   - Power Plant
   - Oil & Gas sector
   - Chemical Industries
   - Textile Industries

Our company offers excellent quality Demineralization Plant manufactured through technically advanced process. Demineralization Water Treatment Plant, provided by our company, is highly demanded in various industries and municipal sectors. Today, we are regarded as one of the trusted Demineralization Water Plant Exporters.