By the pressure of the oil fed into the extinguisher (2 to 3.9 MPa), the oil flows from many fine holes into the atomizing piece with the tangential groove, and enters the vortex chamber at the center of the atomizing piece at a large speed.
It is sprayed at a high speed to form a hollow conical atomizing torch. The injectors are available in both simple mechanical and oil return styles.
The former has a simple structure, but the fuel injection is poorly adjusted. When the boiler
load changes, the oil pressure must be changed to vary the fuel injection amount. However, if the oil pressure is lowered, the atomization quality is poor, so it is only suitable for boiler
s with a fundamental load or no need to constantly adjust the load.
The latter is to allow a part of the oil flowing into the vortex chamber from the tangential groove to flow back through the oil hole before the outlet hole, and apply the modified oil return amount to adjust the fuel injection amount (ie, oil return conditioning). Since the oil pressure entering the vortex chamber is not changed at all, the atomization quality of the oil is not affected, so that a large load fluctuation can be accommodated.
The oil return has a single hole oil return and a porous oil return.