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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. Visit http://www.acmeairequipments.com/product.html to know in detail about the twin lobe roots blowers for water treatment plants offered by leading blowers manufacturer and supplier in India. 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. Article Source: http://www.acmeairequipments.com/articles/89-blowers-for-water-treatment-plant.html This article has been written and posted by Ajit Joshi.
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