When using spray drying equipment, the evaporation capacity of the material is too low?

　　Pharmaceutical Network Technical Article: Spray drying equipment is to make liquid materials through the nozzle atomized into a fine mistdrop, in the drying tower with the thermal media, drying into powder thermal process, it is widely used in the pharmaceutical and other industries Recently, some users said that the company used spray drying equipment to dry the material, found that the evaporation capacity of the material is too low phenomenon What's the reason? And how to fix it? There are factory technical personnel to answer this, the author to carry out a brief combing
Technicians pointed out that the spray dryer evaporation capacity is too low for several reasons First, the equipment failure, so that dry air into, the air temperature is too low, external air through the equipment gap into the drying room, the equipment's evaporation capacity will be significantly reduced
The solution to this situation is to check that the fan is working properly, whether the outlet of the centrifugal fan is equipped with a butterfly valve, check that the valve is open, and check that the equipment is damaged For the problem, one by one exclusion, if there is any abnormal should be dealt with in a timely manner
Second, the operation method of the spray dryer is not correct It is reported that in the operation of the spray dryer, should first turn on the spray drying equipment centrifugal fan, and then turn on the electric heating, and check whether there is air leakage, such as normal can be preheated
Technicians pointed out that hot air warm-up determines the evaporation capacity of drying equipment, in the premise that does not affect the quality of the dried material, should be as much as possible to improve the inlet temperature, otherwise the evaporation capacity of the equipment may be reduced
Third, the exhaust air outlet of the equipment is blocked At this point, you need to check that the exit is clean and blocked If there should be timely solution
In addition, the quality of equipment is also to ensure the stability of equipment, to ensure evaporation capacity and service life of the key Users in the purchase of equipment, should try to shop more than three, choose the quality of the regular manufacturers of products, in the event of problems can also be timely help and timely processing of failures
The author understands that in recent years, with the continuous promotion of energy conservation and environmental protection concepts, improving the environmental protection measures of spray dryers to reduce dust and exhaust gas leakage has become an urgent issue for the industry to consider At present, the spray dryer industry is also upgrading, the overall direction towards energy-saving, sustainable production efforts Many manufacturers with technical and financial capabilities are also improving and upgrading products and enhancing their market competitiveness through cooperation in production, research and development
For example, there are already manufacturers committed to continuous production direction, to create a centrifugal spray dryer gas liquid two-phase and flow drying equipment, the use of high-speed centrifugal atomizer, the liquid mist into a fine droplets, and the distribution of hot air in the drying tower mix, rapid heat exchange, in a very short period of time dry into powder products
The manufacturer said that in addition to energy conservation and environmental protection, the equipment due to production control and product quality control is convenient and reliable, widely used in different types of liquid materialdry production, while the hot air distribution is reasonable, eliminating the phenomenon of ceiling and sticky wall
In addition, the industry pointed out that large-scale, high-strength, high economy, as well as improve the adaptability of raw materials and product quality, is the basic trend of the development of spray dryer With the continuous development of the pharmaceutical industry, the future spray dryer also needs to have new technology and reform.