Boiler Mounting and Accessories, PDF

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Boiler Mounting and Accessories:

The history of boilers began with steam boilers that were used to power transportation, such as those seen in early trains and ships.

Early models like the “Scotch Marine” and similar early fire tube boilers were made from a steel shell with rounded tube sheets that were welded at both ends.

The boiler is like a closed vessel from which steam is used produced from the several methods like in

Fire tube: Water surrounded by a tube and Hot gas flowing in the tube and

Water tube: Hot gases surrounded by tube and Water flowing in the tube.

Related articles:

Boiler-Definition, Fuel used, Types or Classification in details, Parts, Boiler Mounting, Accessories, Function, Application, PDF

Definition:

A boiler is a closed vessel in which fluid (generally water) is heated up to high-pressure steam.

The boilers are used in power plants, for the generation of steam.

They are mostly used in the power plants where steam turbines are used for the generation of electricity.

Mounting:

There are several mounting which is having several works inside or outside the boiler like:

  • Water level indicator ( Water level gauge)
  • Safety valves
  • Stop valve
  • Pressure gauge
  • Feed check valve
  • Blow off cock or Valve

Water level indicator ( Water level gauge):

  • The water level indicator shows the level of water within the drum.

Safety valves:

It blows off the extra steam when the steam pressure inside the boiler reaches above safety level.

Stop valve:

The stop valve is used to transfer steam to the desired location when it is required. Otherwise, it stops the steam in the boiler.

Pressure gauge:

It measures the pressure of steam inside the boiler.

Feed check valve:

It allows feed water to pass or enters into the boiler.

To prevent the backflow of water from the boiler, when the feed pump pressure is less than boiler pressure or pump is stopped by using a non-return valve.

Blow off cock or Valve:

It is used to blow off the settle down impurities, mud, and sediments present in the boiler water.

Accessories:

There are multiple Accessories. Boiler accessories are used to increase efficiency. The accessories may be installed either inside or outside the Boiler.

  1. Feed Pump
  2. Economizer
  3. Air Preheater
  4. Superheater

Feed Pump:

The main function of the feed pump is to deliver the water to the boiler.

Economizer:

The feed water by means of the feed pump is circulated through the economizer tubes. Hot flue gases pass over the economizer tubes and the feed water is preheated.

Air Preheater:

The function of air preheater is to increase the temperature of air for combustion of the fuel with the help of flue gases. This is kept between the economizer and the chimney.
This is installed to increase the performance of the steam generating process of the boiler.

Use of preheated air for combustion of fuel helps in achieving a faster rate of combustion, the possibility of burning inferior quality coal/fuel and increased rate of evaporation from boiler

Superheater:

A superheater is a device used to convert saturated steam or wet steam into superheated steam or dry steam. Superheated steam is used in steam turbines for electricity generation, steam engines, and in processes such as steam reforming. 

Related articles:

“Boiler-Definition, Fuel used, Types or Classification in details, Parts, Boiler Mounting, Accessories, Function, Application, PDF”

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