Rationale for the design of rotating plate spraying

Abstract

Known aerosol (air-liquid) sprayers of chemicals, or their solutions, including devices for supplying a solution from a tank, dispensers and a fan. These sprayers have the advantage of providing low volume spraying when small doses of highly concentrated chemicals are required. Application of rotating atomizers with a vertical axis of rotation, providing a narrow range of droplet sizes and, on this basis, obtaining monodisperse ultra low-volume technology with controlled droplet size and deposition. Since rotating plate nozzles provide the narrowest range of droplets, they also provide ease of adjusting their size by changing the frequency of its rotation. The rotational speed of the saucer also affects the flight range of the droplets. Thus, the spray pattern depends on three main factors – the dimension of the droplets, the rotational speed of the tray, and the height of the tray from the surface of the object to be sprayed. It was experimentally determined that, in addition to the above, the shape of the spray spot also depends on the angle of separation of the drop from the tray. The experiments carried out have shown that the angle of flight of the droplet relative to the longitudinal axis of the position of the plate determines the shape of the spot. Which can vary from solid to closed ring (torus). Thus, by setting the nozzles at different angles, it is possible to achieve an even distribution of droplets over the entire area of the spray spot. The parameters of the cut spot are determined; they represent the initial data for the formation of an aggregate during the surface application of liquid chemicals. So with the size of the cut spot with a diameter of 5 ... 6 m and a working width of the unit of 24 m, you will need to install five sprinklers. Implementation of the sprinkler as an independently completed unit allows the use of a modular design in the development and completion of the unit.