Why boilers are cylindrical in shape?

Boiler are cylindrical in shape because this shape have minimum chances of stress concentration as compared to other. Assume you have made a square cross section for the storage of steam.

What is a shell boiler?

Shell boilers may be defined as those boilers in which the heat transfer surfaces are all contained within a steel shell. 1b shows a more efficient method of reversing the hot gases through a wet back boiler configuration. The reversal chamber is contained entirely within the boiler.

How does a shell boiler work?

In a shell boiler, hot gas flows through tubes that are surrounded by water. In both cases, the hot gas is able to heat the water. An external reversing chamber reverses the flue gas a second time, leading it into another smoke tube (third pass).

Which type of boiler is it when the furnace is placed in the region of boiling water?

internally fired boilers
6. Which type of boiler is it when the furnace is placed in the region of boiling water? Explanation: If the furnace region is placed in the region of boiling water, the boilers are termed as internally fired boilers.

Why are pressure vessels cylindrical?

Cylindrical Pressure Vessel Cylinders are widely used for storage due to their being less expensive to produce than spheres. However, cylinders are not as strong as spheres due to the weak point at each end. This weakness is reduced by hemispherical or rounded ends being fitted.

Why are cylinders used as containers?

Hygiene and cleanliness. One of the benefits of using a cylindrical packaging is given by its lack of sides and angles. This circumstance prevents dirt from being lodged in any of these corners, both in the container itself and in its enclosure.

What is a shell and tube boiler?

Shell and tube boilers are also referred to as fire tube or smoke tube boilers. Fire tube boilers; contain long steel tubes through which the hot gasses from a furnace pass and around which the water to be converted to steam circulates.

What is mud drum in boiler?

The mud drum acts to concentrate solids such as salts formed from hardness and silica or corrosion products carried into the boiler. Colder, denser water flows to the mud drum through a small number of downcomer tubes, and rises to the steam drum through a much larger number of riser tubes.

What is the usual geometry of a boiler shell?

What is the usual geometry of a boiler shell? Explanation: Boiler shell consists of one or more steel plates bent into cylindrical form that are riveted or welded together. Cylindrical geometry distributes stresses equally and has more strength and is easy to manufacture.

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