Air washer is one of the devices used for air conditioning. It is based on the psychrometry. It is study of the properties of moist air. An air washer is a device used for conditioning air. An air washer air comes in direct contact with a spray of water and there will be an exchange of heat and mass (water vapour) between air and water. The outlet condition of air depends upon the temperature of water sprayed in the air washer. Hence, by controlling the water temperature externally, it is possible to control the outlet conditions of air, which then can be used for air conditioning purposes. In the air washer, the mean temperature of water droplets in contact with air decides the direction of heat and mass transfer. As a consequence of the 2nd law, the heat transfer between air and water droplets will be in the direction of decreasing temperature gradient. Similarly, the mass transfer will be in the direction of decreasing vapor pressure gradient.
A scrubber or scrubber system is a system that is used to remove harmful materials from industrial exhaust gases before they are released into the environment. There are two main ways to scrub pollutants out of exhaust, and they are:Wet Scrubbing: The removal of harmful components of exhausted flue gases by spraying a liquid substance through the gas. Dry Scrubbing: The removal of harmful components of exhausted flue gases by introducing a solid substance to the gas – generally in powdered form. Both of these methods work similarly and perform the same process of removing pollutants. The main difference is the materials they use to filter the gases. By removing acidic gases from the exhaust before it is released into the sky, scrubbers help prevent the formation of acid rain
Centrifugal blowers are widely used in industrial applications where there is a requirement for constant flow of larger volumes of air such as in ventilation, combustion, transporting materials, cooling and heating systems, dust control, air conveyor systems, industrial vacuum applications and in other industrial processes.
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