1 Principle: The disc is applied to the high-speed rotating disc in the horizontal direction to centrifugally force the solution to form a film, a filament or a droplet at a high speed. The spray drying disc rotates due to the friction, hindrance and tear of the air. The tangential acceleration generated and the radial acceleration generated by the centrifugal force are transmitted on the disk at a combined speed, and the trajectory is a spiral shape. After the liquid is thrown from the disk along the spiral, it is dispersed into a small The droplets move at an average speed along the tangential direction of the disc, while the droplets are again sucked by the centripetal suction, due to the different sizes of the sprayed particles. Therefore, their flight distances are different, so particles falling at different distances form a cylinder that is symmetric about the center of the shaft.
2 to obtain a more uniform droplet requirements: a. reduce the vibration of the disc rotation b. the amount of liquid entering the disc is kept constant per unit time c. the surface of the disc is smooth and smooth d. the circumferential speed of the disc should not be too small, rmin =60m/s, if the milk (100-160m/s) is <60m/s, the spray droplets are not uniform, and the spray distance seems to consist mainly of a group of droplets and a group of fine droplets that sink to the disk, and increase with the rotation speed. And decrease.
3 Centrifugal sprayer structure: Requirements: Wetting the perimeter, can make the solution reach high speed, uniform spray, firm structure, light weight, simple, no dead angle, easy to remove and wash, and great productivity.