What are the classification of burner nozzle

      Burner is used more and more in the field of boilers and industrial heating nozzle is affecting the fuel burner combustion performance of one of the key equipment. Nozzle design and manufacturing quality will directly determine whether it can get ideal atomization quality, rational use of in order to ensure the combustion with high efficiency and low noise. There are a lot of burner nozzle, which is in accordance with the atomization, classification of burner nozzle?
1, pressure atomizing nozzle
Pressure atomizing nozzle is by the pressure of the fuel into kinetic energy of the jet, through the liquid or liquid column by shearing air disturbance and the fuel atomization. The advantages of this kind of nozzle is of simple structure, low operation cost. Disadvantage is that when the load hours atomization particle size and the average size increased rapidly decrease combustion efficiency and small flow nozzle clogging of the match and coking.
2, the low pressure atomizing nozzle
Low pressure atomization nozzle is used to power the combustion air atomization of fuel oil. The utility model has the advantages of atomizing power consumption is low, atomization quality better. The disadvantage is that the nozzle itself is complicated in structure, air preheating temperature is limited, nozzle size is small. It is used in small heating furnace for superheated steam.
3, high pressure atomizing nozzle
High pressure atomization nozzle is using high-pressure superheated steam or compressed air atomization, atomization quality and good stability. The combustion air is not directly contacted with the oil spout, so the air preheating is not restricted, the regulating range is larger, and the air preheating is easy to be automatic in the centralized control and the air fuel ratio regulation. The disadvantage is that the aerosol is slightly larger. This nozzle is applicable to the general heating furnace of large and medium-sized heating furnace or superheated steam supply.
4, mechanical atomizing nozzle
Rotary cup type nozzle is a typical mechanical atomizing nozzle tip, it is a kind of high speed rotating cup - shaped device, oil in turn cup into a layer close to the wall of the cup of oil film, the cup mouth centrifugal flying out of atomization. The nozzle due to a rotating mechanism, the structure is more complex, and spray torch angle is too large, in the heating furnace are rarely used.
5, pneumatic atomizing nozzle
Pneumatic atomization nozzle is a high-speed movement by air or steam of impact, shear, rotation of the liquid or liquid column. Gas liquid two phases have high relative velocity to realize the breakup and atomization. The advantages of pneumatic atomizing nozzle is a wide range of adjustment, good atomizing performance. Its main disadvantages are: the atomization energy utilization rate is low; the atomization gas quantity is big; for high viscosity heavy diesel oil, heavy oil residue, coal water slurry can not be high efficient combustion requirements.
6, bubble atomizing nozzle
Effervescent atomization in the world is called the third generation of atomization technology, the nozzle is in the special structure of the channel in injecting compressed air or steam to the formation of a huge number of gas bubbles in the fuel, the bubble movement, deformation, acceleration and a series of process to the burner exit broken, resulting in the formation of droplets is very small and uniform size of spray. It has the following characteristics: bubble atomizing burner which mainly overcomes the surface tension of fuel atomization; required less energy atomization; fine aerosol particles, average size.