The Principle, Usage, and Product Advantages of Heavy Oil Industrial Boiler Burner Combustion Devices
The Principle, Usage, and Product Advantages of Heavy Oil Industrial Boiler Burner Combustion Devices
Principle: Heavy oil enters the combustion device in two ways: swirling oil and axial flow oil. The swirling oil is distributed in a circular manner outside the device; the axial flow oil is a straight cylinder-shaped jet inside. When it reaches the tip of the spray nozzle, it forms a trail and passes through the nozzle hole of the refining plate. The refining plate is divided into various specifications according to the size of the nozzle hole. During the heating and feeding processes, different specifications of the refining plate are replaced according to the needs.
Product Usage: Heavy oil is a byproduct of crude oil refining. It is usually made by preparing it from different proportions of cracked heavy oil, vacuum heavy oil, normal pressure heavy oil, or wax oil.
When selecting the model, the overall requirements should be high heat value, good combustion performance, moderate viscosity, small corrosion and solid impurities, and ease of storage and transport.
Viscosity is a measure of the fluid’s flowability. The higher the viscosity, the worse the atomization effect. It is the most important quality and service performance indicator of heavy oil, directly affecting the work efficiency and fuel consumption of fuel pumps and fuel injectors. With the increase in temperature, the viscosity of heavy oil gradually decreases. Therefore, it is necessary to heat and increase high-viscosity oil to facilitate transportation and atomization.
Therefore, when selecting fuel, in addition to understanding the conventional indicators of oil, it is also necessary to understand the viscosity-temperature curve of oil to ensure that the heating can reach the viscosity required by the combustion device before atomization. For mechanical atomizing combustion devices, the best fuel viscosity for the front spray is 2.5-3.5°Et, while for high-pressure air atomizing combustion devices, the best fuel viscosity is 4.5-5.8°Et.
The viscosity unit is expressed by Engel’s viscosity (°Et) and kinematic viscosity νt (mm2/s) also known as Caledonian cst) and converts them into the relationship: νt = 7.310°Et – 6.31.
Product Advantages:
1. Flame stabilizers are used to maintain a stable vortex circulation at the root of the flame, reducing the internal air rotation, and making half the supply of a first current flow.
2. Adopting a flame protective cover to prevent heavy oil dispersion generated in the airflow from randomly dissipating, creating a similar effect to braking. The historical shape of the flame avoids high temperatures at the furnace head and extends the service life of iron protective covers.
3. External clean air has a sporadic rectangular direct air jet that reaches the front of the combustion device and transforms into a circumferential gap jet. At the same time, increasing the area of the circumferential gap to extend the flame and increase the average temperature within the furnace.
4. Swirling blades are installed at the front end of the internal air pipe, 2 cm away from the outer cylinder wall front end, to collect the flame and avoid high temperatures at the furnace head. The first handle of the combustion device can be adjusted. The position of the rotating blade is 6 inches from the factory exit when adjusting. The range is 0} 6 centimeters without negative values. The internal wind swirling can only be pulled back to extend the flame.
5. Central air will blow hot gas around the spray nozzle back not only cools the inside of the spray nozzle but also cools the end face, protecting the combustion device head and extending its service life.