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AQUA SILENCER
Group members- Guided By-
1. Ankit Gujrathi Prof. S.B. Salvi
2. Harsh Nandan
3. Akshay Holkar
 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.
LITERATURE REVIEW
 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.
The whole unit is then placed in a water container.
A small opening is at the top of the container to
remove the exhaust gases & a drain plug is provided
at the bottom of the container for periodically
cleaning of container.
Also a filler plug is mounted at the top of the
container. At the inlet of the exhaust pipe a non-
return valve is provided which prevents the back flow
of gases and water as well.
1.Mountings
2.Filler Plug
3.Charcoal Layer
4.Perforated Tube
5.Wire Mesh
6.Drain Plug
DIAGRAM
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.
The water is a good absorbing medium. In aqua
silencer the gases are made to be dissolved in water.
When these gases dissolved in water they form acids,
carbonates, bicarbonates etc.,
Action of dissolved SO2
Action of dissolved CO2
Effect of dissolved NOx
Lime water wash method.
 Absorption process.
• 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..
Ca(OH)2 + SO2. .. .. .. . CaSO3 + H2o
Neutralizes any acid present in water
2HCL + Ca(OH)2..........Cacl2 + 2H2
H2SO4 + Ca (OH)2........... CaSo4 + 2H20
Precipitates bicarbonate as calcium carbonate
CO2 + Ca(OH)2........CaCO3+2H2O
Precipitates bicarbonate as calcium carbonate
Ca(HCO3)2 + 2Ca (OH)2......... 2CaCO3 + 2H20
Converts bicarbonate ions (Like NaHCO3, KHCO3 etc.) into carbonates.
NaHCO3 + Ca(OH)2............ CaCO3 + H20 + Na2 CO3
LIMITATIONS OF LIME WATER WASH
METHOD
Amount of neutralization capacity is limited
It is very difficult to handle
Bridging and foam are formed
It is expensive
Regeneration is possible
Lime in any form it is difficult to handle
Activated charcoal is available in granular or
powdered form. As it is highly porous and possess
free valencies. So it posses high absorption capacity.
Activated carbon is more widely used for the removal
of taste and odorous from the public water supplies.
Because it has excellent properties of attracting
gases, finely divided solid particles and phenol type
impurities, The activated carbon, usually in the
powdered form is added to the water either before
or after the coagulation with sedimentation.
It increases the coagulation power of the process.
Its use reduces the chlorine demand.
The excessive dose of activated carbon is not
harmful.
The treatment process is very simple and it requires
nearly no skill.
The efficiency of removing color, odour and taste is
quite high.
It can be easily regenerated.
It has excellent properties of attracting gases.
The aqua silencer is more effective in the reduction
of emission gases from the engine
exhaust using perforated tube and charcoal,
By using perforated tube the backpressure will
remain constant and the sound level is reduced.
By using perforated tube the fuel consumption
remains same as conventional system.
By using water as a medium the sound can be
lowered and also by using activated charcoal in water
we can control the exhaust emission to a greater
level.
The water contamination is found to be negligible in
aqua silencer.
It is smokeless and pollution free emission and also it
is very cheap. This aqua silencer’s performance is
almost equivalent to the conventional silencer. It can
be also used both for two wheelers and four
wheelers and also can be used in industries.
SCOPE OF THE PROJECT:
There has been an increasing concern in recent years over the increasing of
transportation and discharge of industrial waste waters into environment. The
automobile emission contains air pollutants and other species. Almost all pollutants
are toxic in nature. Some of the examples are CO, CO2, NOX, and Hydrocarbon.
Among the air pollutants, all are most effective pollutants. Hence, the removal of
pollutants was selected for the present study. Several expensive techniques are
available in developed countries. But in developing countries like India is not
applicable since adsorption technique is less expensive and economically feasible, it
has been selected for the present study using some cheap cost chemicals as an
effective adsorbent. Therefore the objective of the present work was to test the
ability of some chemicals in removing air pollutants from automobile emission.
THANK YOU

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Aqua silencer ppt

  • 1. AQUA SILENCER Group members- Guided By- 1. Ankit Gujrathi Prof. S.B. Salvi 2. Harsh Nandan 3. Akshay Holkar
  • 2.  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.
  • 4.  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.
  • 5. The whole unit is then placed in a water container. A small opening is at the top of the container to remove the exhaust gases & a drain plug is provided at the bottom of the container for periodically cleaning of container. Also a filler plug is mounted at the top of the container. At the inlet of the exhaust pipe a non- return valve is provided which prevents the back flow of gases and water as well.
  • 8.
  • 9. 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.
  • 10. The water is a good absorbing medium. In aqua silencer the gases are made to be dissolved in water. When these gases dissolved in water they form acids, carbonates, bicarbonates etc., Action of dissolved SO2 Action of dissolved CO2 Effect of dissolved NOx
  • 11. Lime water wash method.  Absorption process.
  • 12. • 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..
  • 13. Ca(OH)2 + SO2. .. .. .. . CaSO3 + H2o Neutralizes any acid present in water 2HCL + Ca(OH)2..........Cacl2 + 2H2 H2SO4 + Ca (OH)2........... CaSo4 + 2H20 Precipitates bicarbonate as calcium carbonate CO2 + Ca(OH)2........CaCO3+2H2O Precipitates bicarbonate as calcium carbonate Ca(HCO3)2 + 2Ca (OH)2......... 2CaCO3 + 2H20 Converts bicarbonate ions (Like NaHCO3, KHCO3 etc.) into carbonates. NaHCO3 + Ca(OH)2............ CaCO3 + H20 + Na2 CO3
  • 14. LIMITATIONS OF LIME WATER WASH METHOD Amount of neutralization capacity is limited It is very difficult to handle Bridging and foam are formed It is expensive Regeneration is possible Lime in any form it is difficult to handle
  • 15. Activated charcoal is available in granular or powdered form. As it is highly porous and possess free valencies. So it posses high absorption capacity. Activated carbon is more widely used for the removal of taste and odorous from the public water supplies. Because it has excellent properties of attracting gases, finely divided solid particles and phenol type impurities, The activated carbon, usually in the powdered form is added to the water either before or after the coagulation with sedimentation.
  • 16. It increases the coagulation power of the process. Its use reduces the chlorine demand. The excessive dose of activated carbon is not harmful. The treatment process is very simple and it requires nearly no skill. The efficiency of removing color, odour and taste is quite high. It can be easily regenerated. It has excellent properties of attracting gases.
  • 17. The aqua silencer is more effective in the reduction of emission gases from the engine exhaust using perforated tube and charcoal, By using perforated tube the backpressure will remain constant and the sound level is reduced. By using perforated tube the fuel consumption remains same as conventional system.
  • 18. By using water as a medium the sound can be lowered and also by using activated charcoal in water we can control the exhaust emission to a greater level. The water contamination is found to be negligible in aqua silencer. It is smokeless and pollution free emission and also it is very cheap. This aqua silencer’s performance is almost equivalent to the conventional silencer. It can be also used both for two wheelers and four wheelers and also can be used in industries.
  • 19. SCOPE OF THE PROJECT: There has been an increasing concern in recent years over the increasing of transportation and discharge of industrial waste waters into environment. The automobile emission contains air pollutants and other species. Almost all pollutants are toxic in nature. Some of the examples are CO, CO2, NOX, and Hydrocarbon. Among the air pollutants, all are most effective pollutants. Hence, the removal of pollutants was selected for the present study. Several expensive techniques are available in developed countries. But in developing countries like India is not applicable since adsorption technique is less expensive and economically feasible, it has been selected for the present study using some cheap cost chemicals as an effective adsorbent. Therefore the objective of the present work was to test the ability of some chemicals in removing air pollutants from automobile emission.