It is very important to analyze and judge everything rationally. Whether an industry is good or not depends not only on market acceptance, but also on the company's actual ability and industry regulations.
As the last product in the refining process, the quality control of fuel oil has strong particularity, and the formation of the final fuel oil product is restricted by many factors such as crude oil variety, processing technology and processing depth. According to different standards, fuels can be divided into the following categories:
1. Fuel oil can be divided into commercial fuel oil and self-use fuel oil according to whether it is a commodity at the factory. Commercial fuel oil refers to the fuel oil that forms a commodity in the factory link; Self-use fuel oil refers to fuel oil that is used as raw material or fuel for refining production, but has not formed a commodity in the factory.
2. According to the processing flow, fuel oil is also called heavy oil, which can be divided into atmospheric heavy oil, vacuum heavy oil, catalytic heavy oil and mixed heavy oil. Atmospheric heavy oil refers to the heavy oil (commonly known as slurry oil) fractionated from the catalytic cracking unit of the refinery; Mixed heavy oil generally refers to the mixture of vacuum heavy oil and catalytic heavy oil, including the mixture of residual oil, catalytic slurry and part of asphalt.
3. Fuel can be divided into two categories according to the purpose: marine internal combustion engine fuel and furnace fuel, both of which include distillate oil and residual oil. Distillate oil is generally composed of straight-run heavy oil and a certain proportion of diesel oil, which is used in medium and high-speed marine diesel engines and small boilers. The latter is mainly vacuum residue, or cracked residue or their mixture, or heavy petroleum fuel oil made by adding a proper amount of cracked light oil, which is used as fuel for low-speed diesel engines, some medium-speed diesel engines and various industrial furnaces or boilers.
The fuel oil of marine residual oil internal combustion engine is the fuel oil of large low-speed diesel engine. Its main performance is that it can spray and atomize fuel well, so as to burn completely, reduce fuel consumption, reduce carbon deposition and engine wear. Therefore, the fuel is required to have a certain viscosity to ensure that it can reach the viscosity required by high-pressure oil pumps and nozzles at the preheating temperature (about 2 1-27 cm), and 38℃ is usually used more. Raytheon 1 viscosity is 1000 and 1500 seconds. Because fuel must be preheated to reduce its viscosity, in order to ensure the safety of use, the preheating temperature must be about 20℃ lower than the flash point of fuel, generally between 70- 150℃.
Slag fuel oil is mainly used as fuel oil for various large and medium-sized boilers and industrial furnaces. The working process of fuel oil systems of various industrial furnaces is basically the same, that is, the oil pump pumps the heavy oil from the oil storage tank, removes the mechanical impurities through the coarse separator and the fine separator, and then preheats it to 70-120 C through the preheater. The viscosity of the preheated heavy oil is reduced, and then it is injected into the furnace through the nozzle at 8-20 atmospheric pressure through the regulating valve. Foggy heavy oil is mixed with air for combustion, and the combustion waste gas is discharged into the atmosphere through the chimney.
Domesticated species
200 # heavy oil, 250 # heavy oil, 180 # fuel oil, 120 # fuel oil, 7 # fuel oil, industrial fuel oil, catalytic slurry, wax oil and mixed heavy oil asphalt.
Import category
Refined emulsified oil, Orie emulsified oil, 180 low-sulfur fuel oil, 380 low-sulfur fuel oil, 180 high-sulfur fuel oil M 100 M300.