Take a look at the fuel oil

Fuel oil is a kind of oil used exclusively for various types of industrial combustion equipment, such as marine boilers, gold treatment furnaces, heating furnaces and other industrial boilers, etc.
, as a source
of ship, locomotive power and industrial heat.
Fuel oil is generally made of heavy oil or residual oil, etc.
, therefore, contains a large number of non-hydrocarbon compounds, colloidal, asphaltene content, viscosity
.
Many fuel oils look similar
to asphalt.

The structure of various boilers and industrial furnaces is simple, the precision is not high, and the working process is mainly composed
of oil pumping, filtration, preheating, injection into the furnace chamber and combustion.
Therefore, the quality requirements for fuel oil are not as strict as those of light oils, but they still have to meet certain quality standards, and the main quality indicators of fuel oil are viscosity, flash point, freezing point, sulfur content, etc
.

Viscosity is the most important quality index of fuel oil, which is divided into different grades
according to different viscosities.
Viscosity directly affects the efficiency and fuel consumption of oil pumps and fuel injectors
.
Suitable viscosity, under suitable working conditions, good injection status and atomization effect, complete combustion, high
thermal efficiency.
If the viscosity is too large or too small, it is easy to cause incomplete combustion of fuel oil, produce black smoke, etc.
, reduce combustion efficiency, and increase fuel consumption
.
Different types of nozzles require the use of different viscosities of fuel oil, generally by using different viscosities of oil blending method to adjust the viscosity
of the fuel oil.

The flash point is the fire safety performance index of fuel oil, which is especially important
for fuel oil working in relatively confined environments such as ships.
The internal point is appropriately high, which can avoid accidental and dangerous accidents
caused by contact with open flames during the storage and use of fuel oil.

Sulfides will generate sulfur dioxide and sulfur trioxide after combustion, pollute the environment, endanger human health, and corrode equipment, so it is necessary to limit the sulfur content
in fuel oil.
With the continuous improvement of environmental protection requirements, the sulfur content of fuel oil will be higher and higher, but the current control of sulfur content in high viscosity fuel oil is not strict
.

Some high-viscosity fuel oil is produced from viscosity reduction residue oil, if the storage and use conditions are improper, there may be sedimentation, delamination and other phenomena, affecting oil supply and thermal efficiency
.
Therefore, high-viscosity fuel oil should also have good storage stability and thermal stability, and the storage process should be kept homogeneous and cannot be layered
.
In addition, fuel oil is required to be free of inorganic acids and mechanical impurities
.

Fuel oil is a relatively inefficient way of using oil, and China's oil resources are relatively scarce, so natural gas or coal should be used as a fuel, and heavy petroleum fractions should not be burned as fuel, but should be processed into clean and light petroleum products
.