Working principle of centrifugal nebulizer


I. Working principle of centrifugal atomizer.

  The atomizer is the part of the spray drying device that makes the atomization medium obtain high energy and high speed, which is also important for the atomization efficiency and stability of the atomization process. The key component of the role. It uses a motor to drive the large gear through a coupling. The large gear meshes with the pinion gear on the rotating shaft. The increased speed of the gear shaft drives the secondary large gear to achieve 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, and the material liquid is sprayed into very small atomized droplets, which greatly increases the surface area material liquid of the atomizer. The hot air in the drying chamber evaporates quickly and can be dried into finished products in a short period of time.

  Second, the structural characteristics of the centrifugal atomizer.

  1. When the feed volume fluctuates, the gear drive has constant speed and high mechanical efficiency;

  2. Adopt long cantilever structure, which can realize the effect of "automatic centering" when the spindle is running and reduce the vibration of the spindle and atomization plate.

  3. Installing floating bearings, so that the flexible shaft can be supported by three pivot points and the shaft system can quickly pass the critical speed.

  4. Reasonable arrangement of fixed support position, the fixed support position is arranged at the node position to reduce the vibration load of the shaft system.

  III. Technical overview

  Centrifugal atomizer is a widely used process in the liquid process forming and drying industry. It is suitable for producing powdered and granular solid products from solutions, emulsions, suspensions and plastic paste-like liquid materials. Therefore, when the particle size distribution, residual moisture content, bulk density and particle shape of the finished product have to meet the standards. Spray drying is a very ideal process.

  IV. Technical characteristics

  Fast drying speed. The surface area of the material liquid is greatly increased after atomization by high-speed centrifugal atomizer. In the hot airflow, 95%-98% of the moisture can be instantly evaporated to complete drying. It only takes a few seconds, especially suitable for drying heat-sensitive materials.

  The product has good uniformity, fluidity and solubility, high purity and good quality. It simplifies the production process and is easy to operate and control. For liquids with water content of 40-60% (special materials can reach 90%), the liquid can be dried into powdered products at one time, without crushing and sieving after drying, reducing the production process and improving product purity. The product size, bulk density and moisture content can be adjusted by changing the operating conditions within a certain range, which is very convenient for control and management.