Energy saving mode, structure and characteristics of laboratory spray dryer

First, the energy saving way of laboratory spray dryer.

　　Compared with the increase of air inlet temperature, the former is more economical. The air outlet temperature adjustment needs to refer to the moisture content of the material.

　　Waste heat recovery and reuse of laboratory spray dryer. The exhaust often has a higher temperature. The spray dryer can use the waste heat recovery system to make effective use of the heat energy of the exhaust gas. It can be used as hot water in the washing process or re entering the heat exchanger to dry again. Preheat the feed liquid. The test data show that preheating the liquid is beneficial to shorten the drying period before drying.

　　Two. Characteristics of laboratory spray dryer

　　1. The production process is decontaminated and the operation and control are convenient. Spray drying is usually used to treat 40%-60% with wet content. Even if the moisture content of the special material reaches 90%, it can also be dried into powder products without concentration. Most of the products do not need to be crushed and screened after drying, thus reducing the production process and simplifying the production process. Within a certain range, the particle size, bulk density and moisture of the product can be adjusted by changing the operating conditions, which is very convenient for control and management.

　　2. The product has good dispersibility, fluidity and solubility. Because the drying process is completed in air, the product can basically keep the ball like the droplet, so it has good dispersibility, fluidity and solubility.

　　3. It is suitable for continuous mass production. Postprocessing technology can be combined with cooler and wind to form continuous production line.

　　4. Prevent public hazards and improve the production environment. Because the spray drying equipment is carried out in the sealed drying tower, it avoids the drying products flying in the workshop. For poisonous gas and odorous materials, the laboratory spray dryer can adopt the closed loop production process, burn toxic gas and odor, prevent air pollution and improve the production environment.

　　5. During the drying process, the speed is fast. After spray, the surface area is very large. In high temperature air flow, it can evaporate instantly.

　　6. During the drying process of the laboratory spray dryer, the temperature of the droplet is not high, and the quality of the product is better. Spray drying. The temperature range is very wide. Even if high temperature hot air is used, the exhaust temperature is still not very high. In the early drying stage, the material temperature does not exceed the wet bulb humidity of surrounding hot air, and the quality of drying products is better. For example, it is not prone to protein changes, vitamin loss, oxidation and other defects. The quality of thermosensitive materials, biology and medicine can be close to the standard of vacuum drying.

　　7. The drying speed is fast, the surface area of the material liquid increases greatly after atomization. In the hot air flow, 95% to 98% of the water can be evaporated in a moment. The drying time only takes several seconds, especially for the drying of heat sensitive materials.

　　8. The product has good uniformity, fluidity and solubility, high purity and good quality. The production process is simplified and the operation and control are convenient.

　　9. For liquid with 40-60% moisture content (special materials can reach 90%), it can be dried into powder product at one time. After drying, it is unnecessary to crush and screen, reduce production process and improve product purity.

　　10. The laboratory spray dryer can adjust the particle size, bulk density and moisture content within a certain range by changing the operating conditions. It is very convenient to control and manage the product.