The atomizing nozzle enjoys a good reputation in the sp […]
The atomizing nozzle enjoys a good reputation in the spray field for its good spray effect. However, few people know that atomizing nozzles actually have two common spray methods, namely, media atomization and mechanical atomization.
The atomization of the atomizing nozzle can be subdivided into bubble atomization and pneumatic atomization depending on the atomization medium.
1. Bubble atomization
The atomization method of bubble atomization has the advantages of low gas consumption, high atomization quality, and atomization effect is basically not affected by the outlet diameter. Therefore, bubble atomization is more suitable for high viscosity liquid fuels such as atomized heavy and residual oil. The principle of bubble atomization is to inject compressed air into the liquid, and to form a stable bubble-like two-phase flow in the mixing chamber of the atomizing nozzle, which changes drastically at a very short distance from the exit of the atomizing nozzle, causing it to sharply Expand until it breaks, and further envelop the liquid film wrapped around it to break into finer liquid mist particles.
2. Pneumatic atomization
Pneumatic atomization can achieve good atomization at lower oil supply pressure, high atomization quality when using high viscosity fuel, and can be adjusted in a wide range and flexible. The principle of pneumatic atomization is to form a high-speed airflow by a certain pressure of gas, thereby promoting a high relative velocity between the gas and the fuel to achieve atomization.
Mechanical atomization mainly relies on the high-speed jet generated by the fuel under the pressure difference to atomize the fuel, and can be subdivided into three types: direct type, centrifugal type and rotary atomization.
Three types of mechanical atomization
The atomization nozzle atomization can make the liquid fuel into very fine particles and a uniform size liquid mist to increase the contact area between the liquid fuel and the combustion air, which can effectively promote evaporation, so that the fuel can be fully and effectively burned, and The finer the atomized particles, the more complete the combustion. Therefore, choosing a good atomizing nozzle is an important way to improve production efficiency and save energy.