Explain about ducts and flues in steam generators, Mechanical Engineering

Assignment Help:

Q. Explain about Ducts and Flues in steam generators?

All air ducts and gas flues connecting the forced draft fan, fan intake silencer, preheater, and transition piece at the generator outlet shall be supplied.

Ducting shall be of continuous seal welded construction to ensure air tightness, with gasketed / flanged connections for field assembly.

Ducting shall be adequately reinforced and stiffened.

Ducting design shall be based on maximum discharge fan pressure at minimum design temperature. Maximum velocity in intake duct shall be 60 ft/s (18.3 m/s). Maximum velocity in flue gas shall be 90 ft/s (27.5 m/s).

Ducting shall be sized to limit the dynamic head at the point of maximum velocity to no more than ten percent of the burner pressure drop at firing conditions.

Minimum thickness of air ducting shall be 3/16 in (5 mm) for air ducting and 1/4 in (6 mm) for flue gas ducting.


Related Discussions:- Explain about ducts and flues in steam generators

Motion of connected bodies, Motion of connected bodies: Analyze motio...

Motion of connected bodies: Analyze motion of connected bodies that is connected by pulleys. Sol: The given figure shows a light and inextensible string passing over sm

Thermodynamic 1st law, What is the diff between system underfoing cycle and...

What is the diff between system underfoing cycle and system undergoing process

Plate clutch pressure-clutch slipping, Plate clutch pressure:  Check plate...

Plate clutch pressure:  Check plate clutch pressure for any step using a straight edge.

Explain what is meant by the nanocomposite, Choose either a plastic, compos...

Choose either a plastic, composite, titanium alloy or aluminium alloy for the applications below and briefly explain your choice. In explaining your choice, relate the properties t

Discover the maximum torque, Discover the maximum torque: Discover the...

Discover the maximum torque: Discover the maximum torque that may be transmitted by the shaft of 400 mm diameter, if the shear stress is not to exceed 50 N/mm 2 . Solution

Calculate the support reaction, Calculate the support reaction: Q: A ...

Calculate the support reaction: Q: A beam 8m long is hinged at point A and supported on rollers over smooth surface inclined at 300 to horizontal at point B . The beam

Axial flow turbine, The mass flow rate is 28kg/s in an axial flow gas turbi...

The mass flow rate is 28kg/s in an axial flow gas turbine that develops 3.5MW. The stagnation conditions are 780KPa and 730 deg.C. at the entry. At the exit of the nozzle, the stat

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd