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

Evaluate mechanical work - thermodynamics, Evaluate mechanical work in diff...

Evaluate mechanical work in different steady flow process: Work done by steady flow process   and work done in non flow process,   1. Constant Volume Process; W 1-2 = V

Find the weight percent of austenite present in the steel, Find the weight ...

Find the weight percent of austenite present in the steel: A 0.4% C hypoeutectoid plain carbon steel is slowly cooled from 1540 o C to (i) slightly above 723 o C and (ii) s

Determine the maximum stress intensities, Determine the maximum stress inte...

Determine the maximum stress intensities: A rolled steel I-section, flanges 150 mm wide & 25 mm thick, web 200 mm long & 10 mm thick  is utilized to carry & axial load of 800

Mircometer, How is a micrometer used?

How is a micrometer used?

Define advantage and disadvantage of electron beam machining, Define Advant...

Define Advantage and Disadvantage of Electron Beam Machining Advantage  1. Suitable for automatic machining. 2. Absence of mechanical contact between work piece and too

Determine the coefficient of performance of the cycle, The temperature limi...

The temperature limits of an ammonia refrigerating system are 25 O C and - 10 O C. if the gas is dry at the end of compression, determine the coefficient of performance of the cycl

Expression for the normal and tangential stresses, Expression for the norma...

Expression for the normal and tangential stresses: By sing Mohr's circle, derive expression for the normal and tangential stresses on a diagonal plane of material subjected t

Explain the semi-automatic extension of screw conveyor, Explain the Semi-Au...

Explain the Semi-Automatic Extension of screw conveyor "Semi-Automatic Extension of screw conveyor as per the screed width by telescopic-tube" Procedure: The extension of

Ultrasonic examination, Q. Ultrasonic Examination? Ultrasonic examinati...

Q. Ultrasonic Examination? Ultrasonic examination, UT and the acceptance criteria shall be in accordance with the Code and performed in accordance with written procedures. W

Truss arrangement assuming the members are beams, Q2.1  Using the stiffness...

Q2.1  Using the stiffness method calculate axial forces and the deflections of the joints of the truss shown in the FIG. The truss was built using 50 mm x 50 mm x 5 mm SHS with  E

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