Friday, November 26, 2010

What is a Marine Boiler?

A boiler is defined as "a closed vessel in which water or other liquid is heated, steam or vapor is generated, steam is superheated, 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."

Also included are fired units for heating or vaporizing liquids other than water where these units are separate from processing systems and are complete within themselves. This definition includes water heaters that exceed 200,000 Btu/hr heat input, 200 degrees Fahrenheit at the outlet, or 120 gallons nominal water containing capacity.

Boilers are one of the essensial equipments onboard ships. It's purpose is to provide heating to the the main deisel propulsion engine, to the bunker F.O. tanks(to make it less viscous for transfer purposes as well as easy ignition). The steam generated by the boiler can also be use for cleaning, and heating of the seawater in the freshwater generator thus evaporating it to make it potable water.

There are two types of boiler mainly use in the Marine Industry, The water-tube boilers and the fire-tube boilers. The most common of which is the water-tube. In the water-tube type, water passes though lines of tube where it is heated by the used of a burner and a furnace.

38 comments:

  1. Hi all,

    Marine boilers are usually of the two-drum water-tube type with water cooled furnaces and heat recovery equipment of the economizer or air-heater type. The majority of ships are fitted with two boilers, although some large passenger ships may have three or more. Thanks a lot....

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  2. A boiler is defined as "a closed vessel in which water or other liquid is heated, steam or vapor is generated, steam is superheated, or any combination thereof, under pressure or vacuum. boiler engineers

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  3. The topic to be discussed is "a Marine Boiler" (not a Boiler generally) so I wish to confirm that a Marine Boiler (Boilers) fitted onboard ship may be as Auxiliary Boiler(s) to product steam by heating Boiler water for general use or Main Boiler(s) to produce steam for steam Turbine(s) propulsion.

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  4. In transport ship how to creat drinking water ??

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  5. It is used the boiler to make the drinking water

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    Replies
    1. On board ship we have fresh water generator, which can processs the sea water and changed into fresh water, but only be used for bath and toilet. For drinking, a ship normally obtain from land pipelines during port stay.

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    2. hey buddy ,if the fresh water generator is at the good condition, specially the salinometer is efficiently working. we are able to produce drinking water out of fresh water generator, or may be your vessel is a cruise ship were you need more supply of drinking water for passengers so you obtain driking water from port.

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  6. What is the difference between main and auxiliary boiler?

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  10. What is the advantage and disadvantage of boiler in the ship?

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  14. Where can i find or read all the operating manuals or procedure by operating marine boilers and its functions.

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  22. What will happen during the operation of the auxiliary machinery if the boiler is not properly working

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  29. Does all offshore vessel are equipped with marine boiler? Especially AHTS, Windfarm and PSV?

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