I. Working Principle of Centrifugal Atomizer
The atomizer is the part of spray drying device that makes the atomization medium obtain high energy and high speed, and it is also the key part that plays an important role in the atomization efficiency and stability of the atomization process. The motor drives the large gear through the coupling, the large gear meshes with the pinion on the rotating shaft, and the gear shaft after a speed increase drives the second large gear to realize the high speed rotation of the atomization disc. When the material liquid enters the feed tube of the centrifugal atomizer, it flows evenly into the high-speed rotating spraying plate through the material liquid distribution plate. The material liquid is sprayed into tiny atomized liquid droplets, which increases the surface area of the material liquid. Contact with the hot air in the drying chamber. It evaporates rapidly and can be dried into finished products in a very short time.
Second, the structure characteristics of centrifugal atomizer
(1) Constant gear drive speed when the material feed speed fluctuates, high mechanical efficiency.
(2)Adopting long cantilever structure, the spindle can realize the effect of "auto-centering" when running, and reduce the vibration of the spindle and atomization plate.
(3) Set floating bearings and support the flexible shaft with three pivot points. Make the shaft system can quickly cross the critical speed.
(4)Reasonable arrangement of fixed support position. Arrange the fixed support position at the node position to reduce the vibration load of the shaft system.
Technology Overview
Centrifugal atomizer is a widely used process in the liquid processing and forming and drying industries. It is suitable for producing powder and granular solid products from solution, emulsion, suspension and plastic paste liquid raw materials. Therefore, when the particle size distribution, residual moisture, bulk density and particle shape of the finished product need to meet precise standards. Spray drying is an ideal process.
Technical features
Fast drying speed, the surface area of the material liquid is greatly increased after atomization by a High speed centrifugal atomizer. In the hot air stream, 95%-98% of the moisture can be evaporated instantly, and the drying time is only a few seconds,. It is especially suitable for drying heat-sensitive materials.
Good uniformity, fluidity and solubility of the product,. High purity and good quality. The production process is simplified and the operation control is convenient. For liquid with moisture content of 40-60% (special materials can reach 90%). It can be dried into powdered products at one time. No need to crush and screen after drying, which reduces the production process and improves the product purity. By changing the operating conditions within a certain range. The particle size, bulk density and moisture content of the product can be adjusted, which is very convenient to control and manage.
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