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The Way To Improve The Atomization Of The Nozzle
Dec 24, 2017

                                   According to the atomization mechanism and experimental study, combined with the experience of the coal mine, the ways to improve the atomization of the nozzle are mainly in the following aspects

(1) increasing the relative velocity difference between the gas-liquid two phases to increase the aerodynamic force and make the droplet broken more finer than that of the atmosphere.

(2) increase the exit speed of the liquid nozzle to enhance the collision, so that the droplets that are ejected can be further broken when they collide. It is found that if the drop velocity of the droplet is small, it will converge into a large liquid drop. If the drop speed of the droplet is large, the degree of atomization can be improved. However, this will reduce the relative velocity of the gas liquid and make the droplets of the aerodynamic atomizing liquid become worse.

(3) the experimental results show that the geometry and size of the nozzle and mixed tube have great influence on the atomization performance. Therefore, in the design of the model, in addition to their impact on the atomization, they should also consider the changes in the overall performance after they are combined.

(4) to study the relationship between the flow and pressure of the spray water system, the geometry of the nozzle and the shape of the nozzle, so as to improve the atomization effect. In particular, the water pressure of the water supply system has a great influence on the atomization effect, the higher the water pressure, the finer the water mist particles are. However, the problems caused by higher water pressure are: (1) energy consumption is large; second, all parts in the water supply system are subjected to high pressure, easy to fail and short life, especially the internal spray system on the mining equipment. This gives us another research topic: how to improve the pressure atomizing nozzle structure to obtain fine water mist particles under the limited water supply pressure.

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