What is boiler? Explain the requirement for boiler operation in an industry



Q 10 : What is boiler? Explain the requirement for boiler operation in an industry


Boiler safety
Boilers are defined as
“Boiler is a closed vessel in which water or other liquid is heated, steam or vapor is generated, steam is super-heated, or any combination thereof, under pressure or vacuum, for use external to itself, by the direct application of energy from the combustion of fuels, from electricity or nuclear energy
1.    Ensure that the vent valve on the boiler is open and check there is no pressure in the boiler.
2.     Check that the steam stop valve is closed.
3.     Check that all the valves for fuel are open, and let the fuel circulate through the system until it comes to the temperature required by the manufacturer recommendation.
4.     Check and open the feed water valves to the boiler and fill the water inside the boiler drum to just above the low water level. This is done because it is not possible to start the boiler below the low water level due to safety feature which prevent boiler from starting. Also, the level is not filled much because if filled too much, the water inside the boiler might expand and over pressurize the boiler.
5.     Start the boiler in automatic mode. The burner fan will start the purging cycle which will remove any gases present in the furnace by forcing it out through the funnel.
6.     After the pre-set purge time the pilot burner will ignite. The pilot burner consists of two electrodes, through which a large current is passed, via the transformer, producing the spark between the electrodes. The pilot burner is supplied with diesel oil and when the oil passes over, the former ignites.
7.    The main burner which is supplied by heavy oil catches fire with the help of pilot burner.
8.    Check the combustion chamber from the sight glass to ensure the burner has lit and the flame is satisfactory.
9.     Keep a close eye on the water level as the pressure increases and open the feed water when the level of water inside the gauge glass is stable.
10. Close the vent valve after the steam starts coming outside.
11. Open the steam stop valve.
 Once the working steam pressure is reached, blow down the gauge glass and float chambers to check for the alarms.

Comments

  1. UnknownJanuary 20, 2022 at 1:41 AM

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