In recent years, drying technology has attracted much attention in the food and other industries. The quality of the
Drying Equipment affects the shelf life and safety of the item. According to relevant statistics, there are currently as many as 500 or 600 drying technologies involved in various drying research reports, and there are more than 100 kinds of practical applications. In China, there are about 400 manufacturers of drying equipment, and companies Still increasing. Among them, the spray drying tower is a drying equipment for biological pesticides, medicines, food microorganisms. Spray drying towers are widely used in the liquid process forming and drying industries and are suitable for the production of powdery, granular, or blocky solid products from solutions, emulsions, suspensions, and malleable liquid raw materials. Therefore, spray drying is a good process when the particle size distribution, residual moisture content, bulk density, and particle shape of the finished product must meet the corresponding criteria. It is understood that the spray drying tower is compact in design and does not require ancillary equipment. For sticky materials, there is a nozzle cleaner (through pin). When the nozzle is blocked, it will be automatically cleared and the frequency of the pin can be adjusted automatically. The active material remains its active ingredient after drying. Most of the drying failures of the spray drying tower are due to the adjustment of the air volume or the air pressure of the intake/exhaust fan. Generally, the exhaust air volume is low and the air pressure is low. As a result, the negative pressure of the drying tower is too low. Excessive air temperature results in increased water content of the product. Reasonably adjusting the intake and exhaust fans can effectively improve the drying efficiency and reduce the production energy consumption. Common
Spray Drying Equipment receiving devices mainly include bag filter and cyclone separator. The two receiving devices need to correspond to different fan settings. The spray drying tower has good uniformity, fluidity and solubility, high product purity, good quality, simplified production process, convenient operation and control, high-speed centrifugal atomizer on the top of the tower body, (rotary) spray is very fine The bead of the mist, in contact with the hot air in parallel, can be dried into a finished product in a very short period of time. Special equipment sprays the liquid material into a mist to make it dry in contact with hot air. The
Spray Dryer air is filtered and heated to enter the air distributor at the top of the
Dryer. The hot air spirally enters the drying chamber. In the hot air stream, 95% to 98% of the water can be evaporated instantaneously, completing the drying time only. It takes a few seconds and is particularly suitable for the drying of heat-sensitive materials. In addition, the spray drying tower can also improve the dissolution rate of certain formulations. The author has learned that the spray drying tower can instantaneously dry at a low temperature and the activity of the material is completely unaffected. It is a small spray dryer for laboratory organic solvents that is safe and easy to operate. It adopts nitrogen-enclosed circulation and adopts solvent completely. The combined use of recovery methods can treat solvents that are flammable and toxic, and can dry easily oxidized materials. The spray drying tower is suitable for the production of powdery, granular solid products from solutions, emulsions, suspensions and pasty liquid raw materials. The drying speed is fast, the surface area of the feed liquid after atomization is greatly increased, and in the hot air flow, it can be instantly evaporated. 95%-98% of the water, only a few seconds to complete the drying time, especially for heat-sensitive materials drying. As the spray drying tower is fast drying, the effect is good, and the application scope is also widening. More and more pharmaceutical machine companies in the market have increased the R&D and innovation of the spray drying tower equipment, and have created drying equipment in related fields. For example, the research and development of broken ganoderma lucidum spore powder spray drying tower is based on broken spores of Ganoderma lucidum spore powder. The spray drying method is used to study the preparation technology of ganoderma lucidum spore powder for spore wall remodeling and product analysis. The results showed that hypromellose and soy protein isolates were composite wall materials, the preferred ratio was 2:1, the ratio of wall material to core material was 2:1, the solids concentration was 30%, and the remolding process parameters were homogeneous. The pressure was 40 MPa, the homogenization frequency was 2 times, the spray drying inlet temperature was 220° C., the outlet air temperature was 105° C., and the spore wall remodeling rate was 90.2%. The prepared product had good dispersibility and strong anti-oxidation properties. With the improvement of people's production level and the expansion of market demand. In the future, enterprises of dry spray towers need to make more efforts in energy saving, environmental protection, and product innovation, eliminate the homogenization of products currently common in the market, strive to break the bottleneck of development, and promote the drying equipment industry to a new level.
