Question: What Is Fuel Oil Settling Tank?

What is the difference between settling tank and service tank?

Settling tank for low sulphur oil and marine gas oil is kept separate from other fuel oil. Service tanks onboard ships are used to store and supply treated oil to main engine, auxiliary engine and boilers. Low service fuel oil (L.S.F.O) and marine gas oil (M.G.O) tanks are dedicated tanks to avoid mix up.

What is fuel oil service tank?

An oil fuel tank that contains only the required quality of fuel ready for immediate use. The arrangement for oil fuel service tank is to be such that one tank can continue to supply oil fuel when the other is being cleaned or opened for repair (according to Lloyd’s Register).

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How often should settling tanks be checked and drained?

All other double bottom and/or deep bunker tanks are subject to Classification inspection and would normally only be inspected on a 60 month frequency. Each Service and Settling fuel tanks, on a rotational basis, are to be emptied at intervals not exceeding 36 months or at Dry Dock.

How bunker is transferred from storage tank to settling tank?

In preparation for use, HFO is transferred to the fuel oil settling tanks via FO transfer pumps, which are equipped with a suction strainer. Piping is so arranged that the pumps can convey fuel between storage tanks and the deck connections for offloading.

What is the purpose of settling tanks?

A deep tank in the engine room used for pre-cleaning of fuel oils by gravity; a liquid mixture in the settling tank clears slowly as a heavier liquid and solids sink to the bottom under influence of gravity.

What tank is located in the outer portion of the engine room?

Double bottom tanks are generally located outside the engine room. This tank is located around the stern tube of the propeller and acts as a cooling media for the same. It can be used as a fresh water water tank of the ship. Slop tanks are present onboard tanker to store oily water mixture from cargo tank washing.

How does fuel oil transfer work?

This system receives and stores fuel and delivers it to settling tanks. Fuel oils are loaded through deck fill connections that have sample connections provided to permit the fuel to be sampled as it is taken aboard. HFO is loaded in storage tanks fitted with heating coils.

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Why do we mix columns in fuel oil system?

The mixing tank is used to collect recirculated oil and also acts as a buffer or reserve tank as it will supply fuel when the daily service tank is empty. The system includes various safety devices such as low-level alarms and remotely operated tank outlet valves which can be closed in the event of a fire.

What is the difference between heavy fuel oil and diesel oil?

Unlike heavy fuel oil (HFO), marine diesel oil does not have to be heated during storage. Marine diesel oil is sometimes also used synonymously with the term “intermediate fuel oil” (IFO). In the strict sense, the term marine diesel oil mainly refers to blends with a very small proportion of heavy fuel oil.

Why is condensate water is not allowed to enter combustion space?

When the condensate is not able to flow away freely from the boiler, it will back up and flood the combustion chamber. This will eventually block the flow of flue gas or rise to the level of the flame sensor, and will result in a burner lock-out.

How do you start and stop a purifier?

Starting the Purifier

  1. Ensure the lines are set and respective valves are open.
  2. Start the purifier feed pump with the 3-way re-circulation valve in a position leading to settling tank.
  3. Open the steam to the heater slightly ensuring the drains are open so that the condensate drains.
  4. Start the Purifier.

Why is fuel oil treatment necessary?

Fuel oils require treatment before passing to the engine. The separation of impurities and water from fuel oil is essential for good combustion. The removal of contaminating impurities from lubricating oil will reduce engine wear and possible breakdowns.

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What are the 3 stages of bunkering procedure on a ship?

The bunkering procedure on a ship can be divided into three important stages: Preparation– Preparing for the bunkering operation which will involve the readiness of bunkering equipment, storage tanks and bunkering safety.

What is the first thing to do during bunkering operation?

The first thing that has to be established before any bunkering procedure, is to identify the person in charge (P.I.C) for both the receiving and the delivering vessel. These people must have full control over the vessel during the transfer.

What is illegal Bunkery?

“Bunkering” is a term used to describe the process of filling a ship with oil (or coal). “Illegal oil bunkering” is a euphemism for theft.

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