Boiler ppt

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Boilers

• Presented by Indrakumar padwani.
• 
  BE. Mech.MBA marketing.PGDCA..

Objective To describe and explain the boilers
functions and the two main types of boilers.
Boilers accessories and boilers mountings..
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What is a boiler?

• A water containing vessel in which water is
  heated under pressure
• Transfer heat from a fuel source (oil, gas, coal)
  into steam
• The steam or hot fluid circulates out of the
  boiler for use in various process or heating
  appliances.

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How does a boiler work?

• Closed system when 100 of the steam produced is
  returned to be reused.
• Examples of closed systems are close steam
  heating, hot water heating, and one-pipe
  systems.
• Open system a system that does not return the
  condensate.

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Fire Tube Boilers

• The combustion gases pass inside boiler tubes,
  and heat is transferred to water on the shell
  side.

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Water Tube Boilers

• Boiler water passes through the tubes while the
  exhaust gases remain in the shell side, passing
  over the tube surfaces.

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Conclusion

• Boilers are classified into fire tube or water
  tube boilers depending on whether the heat source
  is inside or outside the tubes.
• The goal in both cases is to maximize the heat
  transfer between the water and the hot gases
  heating it.

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BOILER MOUNTINGS AND ACCESSORIES

• BOILER MOUNTINGS
• Fittings which are mounted on the boiler for the
  proper functioning.
• Boiler cannot work and fuction safety without the
  mountings.
• Followings are some important boiler mountings

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BOILER MOUNTINGS ARE

• Water level indicator
• Pressure gauge
• Safety valves
• Stop valve
• Blow off cock
• Feed check valve
• Fusible plug

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Boiler Accessories

• Boiler Accessories.
• These are the devices which are used as integral
  parts of a boiler and help in running boiler
  efficiency.
• Some important accessories are
• Feed pump,Superheater,
• Economiser,Airpreheater.

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BOILER ACCESSORIES

Superheater
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