Spray dryer companies
The spray dryer is a device that can complete the drying and powdering of the stock solution at the same time. The raw liquid in the drying chamber passes through a nozzle (nozzle method) or a high-speed rotating atomization disk (rotary atomizer method) to increase the surface area of the liquid while continuously spraying hot air to instantly dry and form a powder. Therefore, even substances that are very sensitive to heat will rarely deteriorate. In the complicated manufacturing process of concentration, filtration, crushing, classification, drying, etc., it has a one-step effect. Since the dried particles are nearly spherical, they have good fluidity. Foods, pharmaceuticals, etc. are easily soluble in water after drying, and the density of powders such as electronic materials, powder metallurgy, and fine ceramic materials is high.
The spray dryer is a drying equipment suitable for liquid materials with low heat-sensitive temperature points and high viscosity. Its working principle is: the cold air is filtered through the filter, then enters the heater, is heated to a certain temperature, and then enters the air distributor at the top of the spray tower, and the hot air travels to the bottom of the tower evenly in a spiral shape. The material liquid is pumped from the batching tank to the centrifugal atomizer at the top of the tower body. The material liquid is torn into tiny mist droplets, and the material liquid droplets are in parallel contact with the hot air, and heat exchange is fully carried out , The moisture in the material liquid is quickly vaporized and evaporated, and dried into a finished product in a very short time. The finished product is separated by a cyclone and discharged and emptied, and the waste steam is discharged by an induced draft fan.
Advantages of spray drying:
1.The production process is simplified and the operation process is convenient. Spray drying can directly dry liquid materials into solid products, which simplifies a series of unit operations such as evaporation, crystallization, separation, drying, and pulverization required by traditional processes, and by changing operating conditions, it is convenient to adjust the particle size and bulk density of the product , Moisture content, etc.
2.Drying quickly, the temperature of the material during the drying process does not exceed the wet bulb temperature of the hot air, no overheating occurs, and the loss of the effective components of the material is small, so it is especially suitable for the drying of heat-sensitive materials (except countercurrent).
3.The dried product has good dispersibility, fluidity and solubility.
4.Since spray drying is carried out in a closed container, it can prevent environmental pollution.
5. Spray drying can be operated continuously and can meet the requirements of industrialized large-scale production.
6. Real-time PID temperature control technology, real-time online display of inlet air temperature and outlet air temperature, temperature control accuracy ±0.5℃.
7. The machine has a protection function for misoperation. When the fan and heater switches are used in the wrong order, the machine will automatically remind to prevent novices from misoperation and damage to the machine.
8. With shutdown protection function: just press the stop button when shutting down, the machine will stop running immediately except for the fan, ensuring that the equipment will not burn out the heating part due to misoperation (forcibly turning off the fan).
9. Built-in imported oil-free air compressor, the particle diameter of the powder is normally distributed, the fluidity is good, and the noise is very low, which meets the national laboratory noise standard.
10. Can be upgraded to a two-stage separation collection system.
