GR (SHANDONG) NEW MATERIAL CO., LTD , https://www.grmaterial-film.com
Spray dryers can be classified into three types: pressure type, centrifugal type and air flow type.
Among them, the pressure spray drying is to use a high-pressure pump to pass the material through an atomizer (gun) at a pressure of 70 to 200 atmospheres, and to form a misty particle of 10 to 200 in direct contact with hot air for heat exchange, which can be short. Drying is completed in time.
Centrifugal spray drying is to use a disk that rotates at a high speed in the horizontal direction to give a centrifugal force to the solution, so that it can be ejected at a high speed to form a film, a filament or a droplet. Due to the friction, hindrance and tear of the air, the disc is used. The tangential acceleration generated by the rotation and the radial acceleration generated by the centrifugal force form a spiral trajectory. After the liquid is thrown from the disc along the spiral, it is dispersed into tiny droplets at an average speed along the tangential direction of the disc. Movement, while the droplets are again sucked by the gravity of the earth. Due to the different sizes of the sprayed particles, their flight distances are different, so the particles falling at different distances form a cylinder that is symmetric about the center of the shaft. Centrifugal spray dryers are currently used in the pharmaceutical industry.
The working principle of airflow spray drying is that the wet material enters the dryer through the conveyor and the heated natural air at the same time, and the two are fully mixed, and the evaporation and drying are achieved in a short time due to the large heat and mass exchange area. The dried product is discharged from the cyclone, and a small portion of the fly powder is recycled by a cyclone or bag filter. Therefore, the airflow spray dryer exhibits a circular economy of resource utilization.
Depending on the type of equipment, its advantages and disadvantages are also very obvious, so users need to choose the spray dryer according to their own needs, in order to play its role. It is understood that with the improvement of the requirements of the pharmaceutical industry, spray dryers are facing further improvement and upgrading in terms of resource utilization, production efficiency, energy conservation and environmental protection.
In 2019, under the influence of medical insurance control fees, quantity procurement, and consistency evaluation, the profit growth rate of China's pharmaceutical industry may continue to decline. The industry initially estimated that the total profit of the pharmaceutical industry in 2019 will reach about 23.3 billion yuan, an increase of about 6%. In this context, spray dryer equipment will also usher in more opportunities and challenges.
In the past, China's spray drying technology is relatively backward, production efficiency is low, and the quality and output of products are difficult to meet user requirements. In recent years, with the development of science and technology, domestic spray drying technology has been significantly improved, which can meet the needs of some pharmaceutical companies. However, compared with foreign spray dryer equipment, China's technical level still needs to be improved.
The industry pointed out that the overall level of the spray dryer industry in China has shown a lagging state, most of which is caused by low-level repetitive production, including poor equipment manufacturing materials and poor processing techniques.
At present, China's support policies for automation and intelligence continue to advance. Under this background, the spray dryer equipment industry should shorten the gap with foreign countries, and can improve it from the aspects of equipment intelligence, processing methods and processing quality. .
Spray drying is a method applied to the drying of materials. It can dry the solution, emulsion and suspension into powder or granular products, eliminating the steps of evaporation and pulverization, and is widely used in the pharmaceutical industry. According to industry data, the total market size of global spray dryers in 2017 was US$1.068 billion, which has grown steadily in recent years. According to the analysis, the market is expected to reach US$1.611 billion by the end of 2025. As a big country in pharmaceutical machinery and equipment, China will also have good opportunities in the global spray dryer market.