What is marine diesel?

Marine diesel belongs to marine fuel oil. Marine fuel oil is divided into two categories: the first category is distillate marine fuel; The second is residual marine fuel, and marine diesel belongs to the first fraction. The name of distillate fuel oil has different terms. The principle is that diesel fraction is divided according to viscosity. High-speed diesel engines use light diesel oil and medium-speed diesel engines use heavy diesel oil.

Marine oil is mainly used for water transportation, and marine fuel oil is mainly used as fuel for ocean-going ships and large ships sailing along the coast.

Most ocean-going ships that open water passages between countries in the world are powered by fuel, because fuel is easier to store and transport and cheaper than coal. In metallurgical industry, fuel oil can also be used to smelt metals instead of coke. Fuel oil mainly comes from vacuum residue and cracked residue. This fuel oil has low viscosity and freezing point, and can be used with little or no preheating.

The moisture and mechanical impurities of marine fuel oil should be strictly controlled, otherwise the oil circuit, oil filter or nozzle will be blocked, causing the ship to stop halfway and even dangerous accidents; The fuel oil with poor stability can't be started because the precipitated asphalt colloid sludge blocks the oil supply pipeline or sticks to the oil pump or nozzle after shutdown.

The storage stability of marine fuel oil is extremely important. In order to improve combustion performance and reduce coking in nozzle and furnace, it is required to have good stability and use less hard asphalt. It is best to use fuel oil without asphaltene, which can effectively reduce the carbon dust content in combustion waste gas and prevent black smoke, thus saving fuel and preventing air pollution. Most ocean-going ships that open water passages between countries in the world are powered by fuel, because fuel is easier to store and transport and cheaper than coal. In metallurgical industry, fuel oil can also be used to smelt metals instead of coke. Fuel oil mainly comes from vacuum residue and cracked residue. This fuel oil has low viscosity and freezing point, and can be used with little or no preheating.