20-10-2012, 04:04 PM
AQUA-SILENCER
59664952-Aqua-Silencer.pptx (Size: 390.66 KB / Downloads: 159)
Introduction
Air pollution is major problem.
The main pollutants contribute by automobiles are (CO), UBHC, (Nox) and Lead etc.,
Other sources such as electric power generating stations, industrial and domestic fuel consumption , refuse burning, industrial processing.
So it is imperative that serious attempts should be made to conserve earth’s environment from degradation.
An aqua silencer is an attempt in this direction, it is mainly dealing with control of emission and noise.
An aqua silencer is fitted to the exhaust pipe of engine.
Aqua silencer
Basically an aqua silencer consists of a perforated tube which is installed at the end of the exhaust pipe.
The perforated tube -different diameters. purpose of providing different diameter hole is to break up gas mass to form smaller gas bubbles.
Generally 4 sets of holes are drilled on the perforated tube. The other end of the perforated tube is closed by plug.
Around the circumference of the perforated tube a layer of activated charcoal is provided and further a metallic mesh covers it.
Working principle
As the exhaust gases enter into the Aqua silencer, the perforated tube converts high mass bubbles in low mass bubbles after that they passes through charcoal layer which again purify the gases.
It is highly porous and posses extra free valences so it has high absorption capacity.
After passing over the charcoal layer some of the gases may dissolved in to the water and finally the. exhaust gases escape through the opening in to the atmosphere.
Hence aqua silencer reduces noise and pollution.
Lime water wash method
The water is treated with the calculated quantities of slaked lime.After mixing the heavy precipitates settle down as sludge at the bottom of the tank are removed from time to time.
Lime can neutralize any acid present in the water. SO2 , gases are removed from the flue gases forming calcium sulphate.
The precipitates dissolved carbon dioxide as calcium carbonate and converts bicarbonate ions into carbonates..