components and working of Velox boiler

1. Construction and working
principle of velox boiler
By
Er. Rampal Singh Ojha
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2. Features of velox boiler
• The Velox boiler is a water tube forced circulation boiler.
• It has a gas turbine-driven air compressor, which compresses the air.
• This compressed-air enters the vertical combustion chamber,
resulting in higher rates of heat from the fuel, which increases the
velocities of the flue gases to the sound velocity.
• olex Boiler contains many parts. Following are the parts of Velox
Boiler in
working sequence :- i) Feed Pump ii) Economizer iii) Water
Circulation Pump iv) Combustion Chamber v) Gas Turbine vi) Axial
Compressor vii) Steam Seperator Viii) Super Heater
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3. Advantages of Velox Boiler :-
• 1) Velox Boiler is very compact and require very less space as
compared to other boilers.
• 2 ) It can be started quickly and easily.
• 3) It has good flexibility.
• 4) It has hogh thermal efficiency about 90-95%.
• 5) It has high heat transfer rate.
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4. Principle of velox boiler
• When the velocity of the gas is greater than the speed of sound, its
heat transfer rate is also increases.
• So more heat is transfer from gas to water as compare when the heat
transfer at the subsonic speed. This is the basic principle of of it.
• This boiler can increase the heat transfer rate or can say steam
generation rate without increasing boiler size.
• This is why; Velox boiler is most successful boiler in the gas turbine
industries.
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5. feed
Pump
economizer
Hot water
Feed
pump
Tube evaporating section
Steam
Separating
section
steam
Convective
superheater
Steam to
prime mover
Gas turbine
compressor
Flue
gases
Flue
gases
water
steam
Hot flue gases
VELOX BOILER Mechtechstuff