With the increasing demand for drying equipment in the China Drying Laboratory, how to choose a suitable small spray dryer for the various spray drying equipments? Spray drying is a drying method in which a liquid atomizer is used to atomize a liquid material into a hot air or an inert gas to atomize the moisture contained in the liquid material or the organic solvent is quickly evaporated. The method can directly make a solution and an emulsion. Drying into powder or granular products can eliminate evaporation, condensation, and crushing processes, and the resulting particles are evenly distributed and have good fluidity. Spray drying has the characteristics of rapid heat transfer, rapid evaporation of water, instant drying time, and good solubility of the dried material. In addition, spray drying can also be used to prepare microcapsules. The principle of the small spray dryer: using a menu-type microprocessor controller (PLC), you can directly set the inlet temperature, air flow, automatic needle frequency, peristaltic pump speed, data acquisition and process monitoring and control. The self-priming peristaltic pump passes the sample liquid from the container through the nozzle into the drying chamber. At the same time, the compressed air enters the drying chamber through the outer sleeve to atomize the liquid. The hot air enters the sprayed liquid particles from the upper layer and the article begins to dry and dry. After the particles are separated from the exhaust gas by a cyclone separator, they enter the collection bottle, and the exhaust gas is directly discharged to the atmosphere or air filtration device through the diameter hose. For the physical or chemical properties of different materials, as well as the size and solubility of the powders or granules required for the experiment, researchers may need a non-type small spray dryer to obtain the best experimental results. However, how to choose a spray dryer suitable for its own scientific research or material drying requirements is a difficult problem for scientific researchers. Below, I will explain some common material applications. First, the material contains a high sugar content (if the juice, Chinese herbal medicine or natural product extract) or material is not heat-resistant (heat-sensitive materials such as enzyme preparation live bacteria, etc.) Because most of the polysaccharide disaccharide oligosaccharides have a relatively low melting point, and when heated, the sugars melt, and the polysaccharide disaccharide itself is relatively easy to absorb moisture. Therefore, ordinary spray dryers are prone to sticking. It is not easy to get good dry powder or granules. In addition, such as enzyme preparations, living bacteria, and some high-molecular materials that are easily denatured at high temperatures, ordinary spray dryers are used. Since the inlet air temperature is at least 180°C, the materials can easily be deactivated or degenerated. Lowering the inlet air temperature of the spray dryer can provide better experimental results. YC-1800 Mini Spray Dryer and YC-2000 Laboratory Low Temperature Spray Dryer (vacuum) of Shanghai Yacheng Instrument Co., Ltd. can Rapid drying is performed at relatively low inlet air temperatures. For example, the inlet temperature of the YC-1800 mini spray dryer can be set to 105°C. Generally, materials with high sugar content can obtain relatively good particles. The sugar content of some materials may have a lower melting point, while the YC-2000 laboratory low-temperature spray dryer is smartly combined with the advantages of spray drying and vacuum drying. The spray drying process can be completed at an inlet air temperature of 60-80°C. Enzymatic preparations, living bacteria, and thermostable macromolecules, etc., instantaneously dry at such a low temperature, and their activity or physical properties are completely unaffected. Second, the material solvent is an organic solvent or the material is easily oxidized or toxic Spray drying contains organic solvent materials that are difficult to dry. In general, organic solvents exhibit flammable and explosive properties. Explosion-proof, closed-type, small-scale spray dryers allow materials to circulate in a closed drying system. The entire system is filled with inert gas ( If nitrogen or argon is used, the contact between organic solvent gas and external oxygen can be avoided, ensuring safe production. Shanghai Yacheng YC-015A experimental organic solvent small spray dryer adopts a safe nitrogen (or other inert gas) closed cycle method. The entire system is closed and the oxygen concentration is monitored online. Once the oxygen concentration in the system reaches 2 %, the system will automatically stop and alarm automatically. It is a small-scale spray dryer for laboratory organic solvents with good safety and easy operation. It can be flammable and toxic by the combination of nitrogen closed circulation and solvent recovery. The solvent is treated and the easy-to-oxidize material can be dried. Moreover, since the boiling point of the organic solvent is low, it is possible to dry the substance susceptible to thermal denaturation by low-temperature drying. Third, the need to get large particles of powder material In some experiments, researchers hope to obtain some large-particle samples. For example, in the catalyst industry, particles with a particle size of about 100 microns are generally required for better catalytic performance, but ordinary spray dryers can only obtain particles below 30 microns. , Shanghai Ya Cheng YC-1000 and YC-018 laboratory spray drying granulator, can better achieve the purpose of the experiment. YC-1000 spray granulator can be used as a separate spray dryer to obtain particles of about 5-30 microns, and can also achieve granulation of small particles, and can obtain large particles of 100-500 microns or more. The YC-018 laboratory spray granulator can be directly spray dried to get large particles of 100 microns. Fourth, poor heat-sensitive or need to improve the solubility of the material Some materials can not be heated basically, and the traditional freeze-drying time is very long, and the dried materials are in a blocky state, poor fluidity, and the solubility is not very good. Compared with traditional freeze-drying technology, Shanghai YC-3000 laboratory spray freeze dryer has the following advantages: (1) atomized and dispersed fine droplets immersed in low temperature quickly frozen, can weaken the growth of ice crystals, reduce ice crystals Destruction of liposomes to avoid leakage and bursting of materials such as drugs; (2) Freezing of samples after vacuum drying to form spherical microparticles with microporous structure, good fluidity, and the size of the particles can be changed by changing the spray process adjust. YC-3000 Laboratory Spray Freeze Dryer is suitable for low temperature drying of heat-sensitive, viscous, active materials and materials with high sugar content, such as Chinese herbal natural product extracts, dairy products, biological agents, enzyme preparations, fruit juices , polymer materials, etc. For materials that require direct nanomaterials, the YC-3000 Laboratory Spray Freeze Dryer is also an excellent choice. Fifth, conventional materials such as battery materials, minerals, polymer materials, compounds, flavors and fragrances, food, western medicine, etc. Some laboratories are used for the preparation of conventional powders or for the drying of materials. You can use YC-015 Mini Spray Dryer. YC-015 is small in size, high speed, low noise and adaptability to battery materials, minerals, and high Many materials such as molecular materials, compounds, flavors and fragrances, foodstuffs, western medicines, etc. can all have very good spray drying effect, and the YC-015 mini spray dryer is easy to operate, even if only 20 ML of material is used to complete an experiment, the dried powder The sphericity is good, and the particle size is positively distributed. In particular, the machine is equipped with a spray head air-cooling device (an upgraded version of the spray head water cooling device, more environmental protection, and a higher cooling efficiency) and a tower wall purging function, greatly expanding the small size Spray dryer application. For some special materials containing chlorine ions, Shanghai Jade Process adopts suitable models specially made of special stainless steel resistant to chloride ions to meet the actual needs of special industries. Shanghai Yacheng Instrument Equipment Co., Ltd. has developed a small spray dryer that is resistant to hydrofluoric acid and has been well applied in Shanghai Institute of Organics, Chinese Academy of Sciences. Multifunctional Hoists,Hoist Weight Machine,Material Hoisting Equipment,Hoisting Equipment Machines Jiangsu Minnuo Group Co.,Ltd , https://www.minnuo-machinery.com