Positive Displacement Blowers for Water Treatment Plant
Blowers usually referred by different
names like rotary lobe blowers, centrifugal blowers, positive
displacement blowers and roots blowers are the air handling devices
widely employed in applications where a relatively constant air flow
rate is desired at varying discharge pressures. There are mainly two
types of blowers used for industrial applications – positive
displacement blowers and centrifugal blowers. While the centrifugal
blowers are good for higher demands, the positive displacement blowers
are employed in case where lower air flow per minute is desired at a
higher discharge pressure.
Working of Rotary Lobe Positive Displacement Blowers
The rotary lobe positive displacement
blowers are employed in various applications including water treatment,
sewage treatment, pneumatic conveying in industries, cement plants,
aeration tanks and for filter backwash in water treatment plants,
aquaculture aeration etc. A blower typically consists of oval shaped
casing in which two eight shaped rotors (having either two or three
lobes) rotate to displace the air from the inlet side of the casing to
the outlet port. The pair of rotors move in a circular motion at the
same speed but in opposite direction. While one of them is driven by
external power source, the other is driven by a pair of equal ratio
gears. These lobes rotate and therefore displace the air from one end of
casing to the other thus helping to achieve a constant flow rate at
differential pressures.
Application of Blower in Water Treatment Plant
The impure water in water treatment
plant is purified with the help of bacteria. The bacteria will purify
the water by degrading the organic matter present in it. This bacteria
requires oxygen during the process and therefore blowers in water treatment plant
are employed in aeration tanks to provide sufficient air amount
required by the bacteria to convert into oxygen required for the
purification process. The rotary lobe positive displacement blowers are
available today in energy saving features and therefore can be quite
economical resources for supplying air required for adding up to the
oxygen content in aeration tanks in the plants. As the rotors within
the blowers rotate they draw air into the blower thereby filling up the
space between them. The intake then closes and therefore the air will
be trapped into the casing. The rotors keep on rotating until the air
exits the outlet port. You can have a look at the twin lobe roots blowers for water treatment plants offered by Acme Air Equipments Company Pvt. Ltd..
Conclusion:
Therefore the air required for oxygen in
water treatment is supplied with the blowers in water treatment
plants. Multistage air blowers are desired in water treatment plants
because these allow variation of the flow thereby optimizing
performance and minimizing power consumption required at all operating
conditions in the plant.
This article educates reader about positive displacement blowers and their application in water treatment plants.
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