Combustion nozzles are special nozzles for atomizing fuel oil, which can produce hollow and solid spray shapes. There are several spray angles of 30, 45, 60 and 80 degrees. This type of nozzle in the study of its flow and angle parameters, generally take into account its viscosity and density. Working pressure in the 7-10kg/cm2, the flow rate of L / h calculation, different nozzles according to the flow rate of different configurations of the corresponding type of oil filter, the flow rate of 1.5L-1.7L / h configuration of 45 micron molten copper filter.