Nitrogen Gas Generator

  Ship’s Nitrogen Gas Generator

Nitrogen gas  generators are used to produce clean and dry nitrogen of higher purity for inerting, purging and cargo padding.

Mainly there are two types of nitrogen generators are widely used on board:

  • One type uses hollow fiber membrane technology and
  • Other one is based on the Pressure Swing Absorption (PSA) process.

Nitrogen may also be supplied from ashore in nitrogen cylinders and stored on board, but nitrogen generators are most convenient way for inerting, purging and cargo padding. Read more

Duties and Responsibilities of a 4th Engineer

Fourth engineer is the officer in charge of engineering watch on board and maintains engine room watch independently. He shall be responsible for the safe and proper operation of machinery plants, and for the duties prescribed in STCW 2010 A-III/1.

Fourth engineer’s duties include but not limited to monitor the mechanical, hydraulic, electrical and control equipments; maintain the machinery space logs and evaluate the significance of the readings taken; and carry out engineering operations, watch keeping and engineering maintenance at operational level.

As an engineer he has some specific duties to the engine room at the same time has some general duties, social responsibilities as well.

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F.O. Purifier

What is purifier and why we use it on board?

As the name implies, Purifier purifies fuel oil used on board. It is a machine that separates impurities from fuel oil. Impurities can be both solid and liquid/water.

Why there are impurities in fuel oil?

Crude oil is refined in the refinery and produces various fine products.  Marine residual fuel is the last product in terms of purity in the refining process.

Besides to make the process more economic silica-alumina is used to break the heavier molecules lighter. This silica-alumina often is not possible to remove completely.

The amount of impurities depends upon the source of crude oil and quality of refining process.

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