The document describes an Aqua silencer, which is fitted to engine exhaust pipes to control emissions and noise. It works by bubbling the exhaust gases through a scrubber tank containing water and an alkaline solution. This reduces the temperature, sound levels, and toxic content of the gases before they are emitted. While more effective at emission reduction than conventional silencers, it also has some disadvantages like increased weight, maintenance needs, and cost. Overall, the Aqua silencer provides a smokeless and pollution-free alternative to traditional silencers.

1. Aqua silencer

2. Abstract:
Air pollution is most important from the public
health of view.
It is imperative that serious attempts should be
made to conserve our environment.
Aqua silencer is an attempt ,which is mainly
dealing with control of emission &noise

3. Aqua silencer is fitted to exhaust pipe of engine.
Because of this property water is used in this
silencer &hence its name Aqua silencer.
This mainly because of small sprockets in water
molecules, thus lowers the sound level.

4. INTRODUCTION:
 Diesel engines are playing a vital role in Road
and Agriculture.
 we cannot ignore the harmful effects of the large
mass of the burnt gases, which erodes the purity of
environment .
 This Aqua Silencer is an attempt to reduce the
toxic content before it is emitted to the
atmosphere.

5. Aqua silencer

6.  By bubbling the exhaust gas through the scrubber
tank containing an alkaline, the temperature of the
gases is reduced.
 A lime stone contained scrubber tank reduces
the percentage of so2.
 For measuring the contents of the exhaust gas,
samples are taken between scrubber inlet & outlet.

7. Design and consideration:
The exhaust gas contains Co2, So2, Co and
temperatures between 500°c to 700°c.
The pressure of exhaust gas depends on:
*Engine speed
*No of cylinders&
*Magnitude of valve.

9. The gas has to push the water, to bubble water
in the scrubber tank.
This may create chances to increase the
backpressure.
 Due to high temperature of the water particles
which come in contact changes its phase to gaseous
state

10. CONSTRUCTIONAL FEATURES:
It consists of perforated tube installed at the
end of exhaust pipe.
It has holes of different diameters to break
up gas mass to small gas bubbles.
The other end of tube is closed by plug.
The whole unit is then placed in water container.

11. Perforated Tube:

12. Working principle:
As the exhaust gases enters the tube it converts
high mass bubbles to low mass bubbles.
After they pass through charcol layer which again
purify the gases.
Finally exhaust gas escapes into atmosphere.

14. Merits:
 No vibration when the engine is running.
 Start the engine easy.
 Control emission and noise in greater level.
 Carbon is precipitated.
 Water contamination is negligible

15. De merits:
Silencer weight is more comparing to
conventional silencer.
 Lime water filling is required once in a
year
 Additional space is required.
It is expensive.

16. Conclusion:
The aqua silencer is more effective in the
reduction of emission gases from the engine.
The water contamination is found to be
negligible in aqua silencer.
It is smokeless & pollution free emission
equalent to the conventional silencer.

17. Thank you