Combustion oil is divided into light oil and heavy oil according to different viscosity grades.
Light oil does not need to be heated to obtain a good atomization effect. Before heavy oil or residual oil is used, the oil should be heated to ensure that the viscosity of the oil is within the allowable range of the burner. Use a viscometer to measure the result and find the heating temperature of the fuel. Residual oil samples should be sent to the laboratory in advance to test their calorific value.
After the heavy oil or residual oil of the burner oil pump has been used for a period of time, the burner should be checked and adjusted. A combustion gas analyzer can be used to determine whether the fuel is fully burned. At the same time, check the drying drum and bag filter to see if there is oil mist or oil smell, so as to avoid fire and oil blockage. The accumulation of oil on the atomizer will increase with the deterioration of the oil, so it should be cleaned regularly.
When the burner oil pump uses residual oil, the oil outlet position of the oil storage tank should be about 50cm higher than the bottom, so as to prevent the water and sundries deposited at the bottom of the oil tank from entering the fuel pipeline. Before the fuel enters the combustion chamber, it must be filtered with a 40-mesh filter. An oil pressure gauge is installed on both sides of the filter to ensure the good work of the filter. When it is clogged, it can be found and cleaned in time.
In addition, after the work is over, the burner switch should be turned off first, and then the heavy oil heating should be turned off. When the machine is shut down for a long time or it is cold, the oil circuit door should be switched, and the oil circuit should be cleaned with light oil, otherwise the oil circuit will be blocked and it will be difficult to ignite.
Selection of different types of burners:
1 According to the atomization method, the burner is divided into pressure atomization, medium atomization, and rotor atomization
1) Pressure-type atomization is to deliver fuel to the oil nozzle through a high-pressure pump for atomization and then mixed with oxygen for combustion. It is characterized by uniform atomization, simple work, less consumables, and low cost. At present, most road construction machinery is Choose this atomization model.
2) The atomization of the medium of the city burner oil pump is through 58ko compressed air or steam under pressure to the periphery of the oil and fuel for premixing and combustion. However, there are many consumables and the cost is high. At present, this type of machine is rarely used in the road construction machinery industry.
3) Rotor cup atomization is to use a high-speed rotor disc (about 6000 rpm) to remove the fuel and atomize it. It can burn poor oil products, such as residue oil with high meal content. However, the model is expensive, and the rotor disc is easy to wear, which requires high debugging requirements. At present, the road construction machinery industry basically does not use this type of machine.