The spray dryer is a continuous atmospheric dryer, which is one of the important equipment in the pharmaceutical industry. It is a device that atomizes the liquid material by spraying, and contacts the hot air in the drying chamber to quickly evaporate the water, thereby directly obtaining powder and granular products. As spray dryers are used more and more widely in the pharmaceutical industry and the medical environment changes, pharmaceutical companies have put forward higher and more requirements for spray dryers.
Before meeting the market demand and the requirements put forward by the enterprise, we need to have an in-depth understanding of the spray dryer. The spray dryer has many characteristics, such as the short drying time; the thermal effect on the product is small, and protein changes are not easy to occur; the product can have good dispersibility, fluidity and solubility; the product can be adjusted within a certain range Residual moisture, particle size, bulk density, etc. inside.
The characteristics of the spray dryer are clear, and the next step is to know the requirements it needs to meet. In terms of materials, whether it is chemical synthetic drugs, biological products, botanical drugs, or natural drugs, they are actually materials with strong heat sensitivity. These materials have strict requirements on the temperature, composition, properties, hygroscopicity, viscosity, softening point, and active ingredients of the hot air. Of course, higher requirements are also placed on spray dryers.
In addition, the material of the contact part of the equipment and the material should be non-toxic, corrosion-resistant, and not chemically react with the material, and there should be no easy-to-fall coatings, fibers, and particulate materials; the driving of the spray dryer should also be stable, and the equipment itself The airtightness should also be good, and the lubricant and coolant should also avoid contact with the material.
Take the hot air stove as an example. Hot air stove is a source of dry hot air, and its fuel consumption directly affects the level of production costs. Therefore, the hot air stove is a key part of the energy-saving spray dryer. The efficiency of the hot blast stove mainly depends on the atomization nozzle. When the atomization is uniform and the combustion is sufficient, the effect of less fuel consumption and more heat can be achieved.
There are other ways to save energy and reduce consumption of spray dryers. For example, comprehensive heat preservation of hot air pipes and towers, recycling of dust and material accumulated in the tower, and use of a microcomputer to control hot air temperature and oil supply can also achieve better energy-saving and consumption-reducing effects, thereby achieving economic and energy-saving production benefits.
At present, the development trend of medicine is good, and the market has more and more demand for medical equipment. As an important pharmaceutical equipment, spray dryers will usher in more challenges in the new environment. Of course, in addition to meeting the requirements of materials, GMP, energy saving and consumption reduction, spray dryer manufacturers must also carry out innovative research and development around the production process, and also improve and upgrade in accordance with customer conditions.
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