Comparison of the composition system of laboratory micro spray dryer
The spray dryer is a small and efficient spray dryer designed for colleges, scientific research institutes, pharmaceutical plants, pharmaceutical (Chinese medicine, western medicine, biopharmaceutical) food, chemical and other scientific research departments engaged in small-scale research. Noise, fast drying speed, low liquid heating temperature, simple and convenient operation process, especially suitable for drying heat-sensitive materials. It still maintains the original color and fragrance, and has good dispersibility, fluidity and solubility. The solvent can directly obtain uniform dry powder, saving labor, labor and hygiene.
Spray drying technology is used for direct powdering and quick drying, and it is now used by more and more laboratories. In particular, the current domestic laboratory micro spray dryer has been successfully developed, which has greatly reduced the price of this most expensive instrument and equipment. The high-end experimental equipment in the past has become the routine equipment of many laboratories, which greatly meets the needs of domestic laboratories. Demand.
The market status of the spray dryer: the laboratory micro spray dryer currently supplied in China is mainly composed of two parts. A. Imported spray dryers based on the B290 model produced by Swiss BUCHI (imported products still have brands such as Japan and the United Kingdom, but sales are few). B. Domestic spray dryers represented by L-117 and L-217 produced by Beijing Laiheng Science and Trade Company (there are still brands such as Shandong and Shanghai). Because domestic products have high cost performance, users are currently the first choice Domestic products.
Spray drying is mainly composed of â‘ hot air circulation system â‘¡ liquid material atomization system â‘¢ cyclone collection system. Because the manufacturers belong to different product areas, the quality of the products produced by different manufacturers varies greatly. Swiss BUCHI company and Beijing Laiheng Electronics Co., Ltd. are professional manufacturers of experimental instruments. Their products are designed and manufactured exquisitely and delicately. They are suitable for the environmental requirements of the laboratory and the operating needs of experimental personnel. Other foreign and domestic manufacturers are mostly production equipment manufacturers, who are not familiar with the environment and work requirements of the laboratory. They are the products of typical miniaturization of large equipment. They lack the precision and ingenuity of the instrument, and are not suitable for flexible experimental operations.
The following is a comparison of the composition system of spray drying:
1. Hot air circulation system.
In the process of spray drying, the hot air circulation system is the main power and carrier for drying, collection, and steam discharge. The B290 type of Swiss BUCHI company and the L-117 type and L-217 type produced by Beijing Laiheng Company both adopt the method of negative pressure suction to make the hot air circulate in the system. The advantages are: the hot air is controlled in the system, there is no leakage, and it will not affect the experimental environment, so that the experimental personnel work in a clean experimental environment.
In importing products of other brands and domestic brands, the positive pressure blowing hot air circulation system is widely used. Because the positive pressure is generated inside the system, each connection of the spray drying system implies the pressure of the hot air leakage. Therefore, the hot air leakage containing dust makes the labyrinth smoke, which is not suitable for the work requirements of laboratory personnel. It is confirmed by experiments that the negative pressure suction type hot air circulation system cooperates with a reasonable structure cyclone collection system. The sample collection rate of the spray dryer sample is more than 10% higher than that of the positive pressure blow-in spray dryer, especially in the experiment of trace samples. more obvious.
2. Liquid material atomization system
In the spray dryer system, the atomizing nozzle is a vital element, and there are usually nozzles with four apertures of 0.7mm, 1.0mm, 1.4mm and 2.0mm. According to different materials and solutions, the choice of nozzles should be consulted with product experts or selected after experiments. Beijing Laiheng Kemao Co., Ltd. provides services for users to test spray or test for users, in order to let users buy the most suitable products. The experimental process of spray drying should achieve a complete set of process methods for a certain material to be successfully dried. Each experimental parameter is an integral part of the entire set of process methods, including the selection of the nozzle, so the manufacturer's technical guidance to the user is very important, and friendly technical support will greatly help the user's experimental success. Beijing Laiheng Technology & Trade Co., Ltd. has accumulated more than ten years of experience in use and production, and has given the most appropriate guidance and services to all users who purchased imported or self-produced spray dryers from our company, and has long provided users with test spray services. User responsibility is the core of Beijing Laiheng's corporate culture. Friendly and thoughtful technical support makes difficult experiments easy in the hands of users.
3. Cyclone collection system
The cyclone collector is a very classic powder collector, widely used in spray dryer systems. Its structural shape directly affects the level of powder collection rate and plays an important role in the spray dryer. For the spray dryer system, the performance of the cyclone collector is often to be considered through actual operation observation and experimental results, so the most reliable way to buy a spray dryer is to test it in person, and only by comparison can it be identified. With a responsible professional attitude, Beijing Laiheng Company has provided a wide range of test spraying services for many users. The experimental results have confirmed the high efficiency of L-117 and L-217 spray dryers, and have been recognized by all test users. And praise.
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