Which indicators can be used as fuel oil testing projects |

Which indicators can be used as fuel oil testing items:
1. The kinematic viscosity of fuel oil, which indicates the degree of viscosity of fuel oil. It is a measure of the ability to resist fluidity. Its size indicates the fluidity, ease of pumping and easy atomization of fuel oil. At present, the most commonly used in China is 40 ° C kinematic viscosity and 100 ° C kinematic viscosity. In the past, the fuel oil industry standard used Enshi viscosity as a quality control index and used 80 °C kinematic viscosity to classify the grade. Oil kinematic viscosity is the ratio of the dynamic viscosity to the density of the oil. When the body has a kinematic viscosity of 1 poise and a density of 1 g/cm3, the kinematic viscosity is 1 Stokes. Viscosity is the main basis for classifying fuel oil grades and is an important quality indicator for fuel oils. 2. The moisture of the fuel oil indicates the amount of water in the fuel oil. The moisture will reduce the calorific value of the fuel oil and rust the relevant parts of the equipment. The presence of moisture affects the freezing point of the fuel oil, and as the water content increases, the freezing point of the fuel oil gradually increases. In addition, moisture can also affect the combustion performance of fuel oil machinery, which may cause accidents such as furnace stalls and furnace shutdowns. 3 The color of fuel oil, the depth of diesel color, the depth of diesel color can often reflect the degree of diesel refinement. 4 The density of fuel oil, the ratio of the mass to volume of fuel oil, the important basis for the measurement of fuel oil, is also an important indicator to measure the composition of fuel oil. 5 The flash point of fuel oil, the lowest flash point of volatile oil of fuel oil, and the safety index of fuel oil also reflect the content of light components in fuel oil. 6. The freezing point of fuel oil, the minimum temperature at which light fuel oil does not flow, the low temperature fluidity index of fuel oil, and the main basis for classifying diesel oil. 7. The acidity of the fuel oil indicates the amount of acidic substances contained in the fuel oil. If the acidity is too high, it will corrode the equipment and is an important quality indicator for the light fuel oil. 8. The distillation range indicates the distribution of each component in the light fuel oil, an important method for determining the components of the fuel oil, and an important quality indicator for the fuel oil. 9. Fuel oil sulfur content. The content of sulfur and its derivatives in fuel oil, environmental indicators, and high sulfur content in fuel oil can cause corrosion and environmental pollution of metal equipment. According to the level of sulfur content, fuel oil can be divided into high sulfur, medium sulfur and low sulfur fuel oil, which is also an important quality indicator of fuel oil. 10. The content of metal elements, the content of metal elements such as Al, V, Si, etc. in fuel oil is limited, and the content of metal elements such as Al, V, Si is limited, which is harmful to equipment. 11. Residual carbon, the residue formed by evaporation and pyrolysis of fuel oil, fuel oil has more carbon residue, indicating that fuel oil is easily oxidized to form colloid or coke. 12. Fuel ash, the inorganic ash of the fuel oil after being carbonized is excessively ash, which will form scale, which will aggravate the wear of the equipment and affect the normal operation of the equipment. In addition, the ash is also covered on the heating surface of the boiler to deteriorate the heat transfer. 13. Impurities of fuel oil, precipitates or suspended solids in the fuel oil, the presence of mechanical impurities will block the oil filter, which will aggravate the wear of the equipment and affect the combustion. 14. Oxidation stability, used to indicate the oxidation stability and oxidation resistance of distillate fuel oil. It is an important quality index of diesel fuel and can reflect the tendency of diesel to form colloid. 15. Cetane number, which measures the ignition performance of diesel, and measures the ignition performance and functional force of diesel in the engine. 16. The calorific value of fuel oil, the heat released by the unit weight of fuel oil when it is completely burned, and the level of heat energy generated by fuel oil is the main indicator for evaluating the quality of fuel oil.

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