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ENGINEERI
NG
CHEMISTRY
Usage of water in industry
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Introduction of Water
 Water, a substance composed of the chemical
elements hydrogen and oxygen and existing in
gaseous, liquid, and solid states
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 Plentiful and most essential for the human
beings.
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Types of water
1. Distilled water
2. Demineralized water
3. Boiler Feed
Water(BFW)
4. Service water
5. Chilled water
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1. Distilled water
 Distilled water is water that has had
many of its impurities
removed by distillation.
 Distillation involves boiling the
water and then condensing the
steam into a clean container.
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Uses of Distilled water
 Automobiles
 Laboratory
 Medical field
 Soap Industry
 Cosmetic Industry
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2. Demineralised water
 Demineralized water is specially
purified water that
has had most or all of its mineral
and salt ions removed.
 It is also known as Deionized
water, DI or Demin water.
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Uses of Demineralised water
 Wash water for computer chip
manufacture, and other microelectronics
 Automotive uses
 Pharmaceutical manufacturing
 Cosmetics
 Aquariums
 Fire extinguishers
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3. Boiler Feed Water(BFW)
 Boiler feed water is an essential part
of boiler operations.
 The general process is given as,
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Uses of Boiler Feed
Water(BFW)
 Boiler water is treated to prevent corrosion and
scaling etc.
 It is mainly used by the boilers to make the
steams of different pressures and
temperatures.
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4. Service water
 Service water is water that does not meet
drinking water quality standards.
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Uses of Service water
 Depending on the application, the service
water must be treated according to the
requirements of it use, such as:
 Industrial
 Agricultural
 Domestic
 Service water reduces corrosion of equipment
and lessens overhead cost.
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5. Chilled water
 Chilled water is a commonly used to cool a
building's air and equipment.
 The temperature of chilled water (between 4°
and 7°C (39-44 °F).
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Uses of chilled water
 In industry, the water chillers is
the use of water cooling instead of air cooling.
 Chilled water is used to cool and
dehumidify air at commercial and industrial
level
 The chilled water absorbs the heat from the
building. It then returns to the chiller where the
chiller removes the heat from the water using
the refrigeration process. .
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