1. Natural attribute
Fuel oil is a kind of finished product oil, main by petrolic residual oil makes cracking incomplete residuum and straight heat up in a steamer, its characteristic is viscosity big, contain the compound that be not hydrocarbon, colloid, bitumen to pledge much. The main technique index of fuel oil has viscosity, contain sulfur content, flash point, water, ash content and mechanical impurity.
A. Viscosity: Viscosity is the function index with fuel the mainest oil, it is to differentiate the main basis of fuel oily grade. It is the magnanimity of pair of fluidity impedance ability, the Yi Liu gender that its size indicates fuel is oily, easy pump sends the stand or fall of gender and easy pulverization function. Home is at present more commonly used is viscosity of motion of 40 ℃ (cent of heat up in a steamer fuel is oily) with viscosity of motion of 100 ℃ (residual model fuel is oily) . The fuel oily occupation standard that our country goes uses viscosity of favour family name (80 ℃ , 100 ℃ ) dominate index as quality, with 80 ℃ athletic viscosity differentiates brand. Oil tastes the ratio that athletic viscosity is the dynamical viscosity that oil tastes and density. The unit of athletic viscosity is Stokes, namely Situokesi, abbreviation this. It is 1 berth when the athletic viscosity of the fluid, density is 1g/ cubic metre centimeter athletic viscosity is 1 Situokesi. CST is the abbreviate of Centistokes, means li this, namely 1 1% Situokesi's.
B. Contain sulfur content: Fuel oil contains sulfur content mediumly exorbitant meeting causes metallic equipment to corrode pollute with the environment. The basis contains the on any account of sulfur content, fuel oil can differentiate for tall sulfur, medium sulfur and oil of low sulfur fuel.
C. Flash point: It is the target that involves use security, flash point crosses small conference to bring ablaze hidden trouble.
D. Moisture: The existence of moisture can affect the condensation point of fuel oil, as the addition of water content, the condensation point of fuel oil rises gradually. In addition, moisture still can affect the burning behavior of fuel machinery, may cause flameout of the chamber of a stove or furnace, stop the accident such as furnace.
E. Ash content: Ash content is the rest after combustion cannot flaming part, especially after oil of catalytic cracking loop and oil of fuel of oily oar infiltration, powder of silicon aluminous activator can make pump, a powerful person wears away quickly. Additional, ash content still can be enclothed go up in boiler heating surface, make diathermancy addle.
F. Mechanical impurity: Mechanical impurity can block mesh of be better than up, cause oil well pump to wear away to jam with atomizer, the influence burns normally.
2. Classification
Fuel oil regards oil refining process as last kinds of medium product, product quality control is having stronger specific characteristics. Final fuel oily product is formed get of a variety of elements such as deepness of craft of original breed, treatment, treatment restrict. According to different level, fuel oil can undertake classified:
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