Types and Specifications of Marine Fuel Oil Sulfur Content Analyzer

一. In order to judge and compare the quality of the fuel and make a reasonable selection, some performance indicators are specified for the fuel.

1. Indexes that affect fuel combustion performance: cetane number ; diesel index; distillation range; calorific value; viscosity

2. Indicators affecting combustion products: sulfur content, ash content, asphalt, residual carbon, vanadium and sodium content

3. Indicators affecting fuel management: flash point, specific gravity, viscosity, pour point, cloud point, freezing point, water content and mechanical impurities.

二. Types and specifications of marine fuel oil:

The types of international fuel oil are divided into: light diesel, marine diesel, intermediate fuel oil and marine fuel oil.

1. Light diesel is the best quality and most expensive diesel fuel. Commonly used in lifeboat diesel engines and emergency power generation diesel engines.

2. Marine diesel. Often used as fuel for power station, engines and diesel main engines during mobile operation

3. Intermediate fuel oil: a mixture of diesel oil and residual oil. Mainly for marine main engine oil.

4. Marine fuel oil: It is the residual oil from petroleum distillation, the viscosity is greater than 3000S, most of which are above 3500S. Mainly used for boiler oil, and can also be used for the latest high-power medium-speed engines and low-speed engines

三.Sulfur is a harmful component in fuel oil, and its main hazards are:

1. The liquid sulfide (H2S, RSH mercaptan) in the fuel oil has an acid corrosive effect on oil tanks, oil pipes, fuel injection equipment, etc.

2. SOx is generated after fuel combustion, and sulfuric acid and sulfurous acid are generated below the dew point of sulfuric acid to cause low-temperature corrosion of cylinder liners, piston rings, exhaust valves, exhaust turbines, exhaust pipes, etc. In addition, the SOx discharged into the atmosphere will cause acid rain and harm the environment.

3. SO3, the combustion product of sulfide, can accelerate the polymerization of HC compounds to form carbon. It dissolves in the carbon scale and hardens, causing abrasive wear.

4. Due to the action of acid, the deterioration of crankcase lubricating oil will be accelerated.

So testing the sulfur content is very important.