Working of boiler, Mechanical Engineering

Assignment Help:

Working of boiler:

Water is filled in boiler shell through the feed valve up to 2/3rd of shell. Water flows down through the down take header by means of descending water tubes and rises upwards through the uptake header and ascending tubes. Inclined tubes help in setting up the water circulation currents.   The hot flue gasses coming from the combustion chamber are made to pass over tubes, under side of drum and super heater tubes. The baffle plates ensure longer contact time of flue gasses with the tubes.  When water in tubes is heated, it begins to move upwards through the ascending tubes and cold water takes its place through the descending tubes. In this manner convection currents are set up.

The hottest gases being raised from the grate come in with that portion of water tube which is located on the highest side near the upper header. Water starts evaporating and mixture of water and steam thus formed reaches into boiler drum. Steam is collected in space above the water. This steam is lead to super heater then tubes for superheating. Superheated steam produced flows out through the stop valve.

1088_Working of boiler.png


Related Discussions:- Working of boiler

Design gas compressors, Q. Design Gas Compressors? As gas compressors a...

Q. Design Gas Compressors? As gas compressors are often high investment equipment, it makes sense to locate these well away from other equipment to minimize potential fire dama

State the planning the foundation for reciprocating engines, State the Plan...

State the Planning the foundation for reciprocating engines i)  The eccentricity of  the common centre of gravity of machine and foundation referred to the centroid of base are

Linear problen, A paper mill produces two grades of paper viz. , X and Y. B...

A paper mill produces two grades of paper viz. , X and Y. Because of raw material restrictions, it cannot produce more than 400 tons of grade X paper and 300 tons of grade Y paper

Cermets-alloys for cutting tools, Cermets Such are the variation of ce...

Cermets Such are the variation of cemented carbides while the carbides of W and Ti are solidified in the softer matrix of Co and Nickel to get high hardness, resistance to hig

MOS, limitations of euler''s theory

limitations of euler''s theory

Carbon and graphite, Carbon and Graphite Both are excellent refractory...

Carbon and Graphite Both are excellent refractory materials but with good grace oxidize and thus are used merely either in neutral or reducing conditions. Graphite is more sta

Ladder friction, Ladder friction: .: A ladder is an arrangement whic...

Ladder friction: .: A ladder is an arrangement which is used for climbing on the walls. It consists of two long uprights of wood or iron and connected by many cross bars. Th

Assumptions made in deriving torsional formulas, Assumptions made in derivi...

Assumptions made in deriving torsional formulas: What are assumptions made in deriving torsional formulas?                                           Sol.: The torsion

Evaluate elongation because of self weight of tapering rod, Determine elong...

Determine elongation because of self weight of tapering rod: Sol.: Take a tapering rod hung vertically and firmly fixed at top position. The rod is of length L tapers unifor

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