Spray drying technology is an efficient and advanced drying method, which is widely used in many fields such as pharmaceutical, food, and chemical industry. It disperses the material into the hot gas stream in the form of fog droplets, realizes the full contact between the material and the hot gas and heat and mass transfer, so as to dry the material quickly and evenly. This technology is particularly suitable for the production of oral solid dosage forms, such as pharmaceuticals and food raw materials.
However, the spray drying process produces products in the form of fine particles, which can pollute the environment in the exhaust gases. In order to comply with increasingly stringent environmental requirements, it is not enough to rely solely on cyclones to separate the products and purify the exhaust gases in the spray drying system. In order to ensure that the dust content in the exhaust gas is less than 50mg m, more efficient purification measures are required.
A common solution is to equip a baghouse. The baghouse captures the dust particles in the exhaust gas through the filter bag, so as to further purify the exhaust gas and make it meet environmental protection standards. In addition, the wet scrubber is also a very effective exhaust gas cleaning device. It makes the dust particles wet and settle down by water through the contact between the water mist and the exhaust gas, thereby reducing the dust content in the exhaust gas to 15-35mgm.
In addition to exhaust gas purification measures, the airtightness of the system is critical when nitrogen is used as a carrier for spray drying. Nitrogen is an inert gas that is used to prevent oxidation or deterioration of materials during the drying process. Therefore, it is essential to ensure that the system is well sealed to prevent nitrogen leakage. At the same time, to ensure safety, the exhaust port must be directed outside to prevent potential risks.
The implementation of these environmental measures is essential for the sustainable development of spray drying technology. They not only help to reduce environmental pollution and improve the environmental protection of the production process, but also create a green and clean production environment for enterprises. At the same time, it is also in line with the society's requirements for environmental protection and sustainable development, and helps to enhance the sense of social responsibility and public image of enterprises.
In short, by taking advanced exhaust purification measures and ensuring the airtightness of the system, we can better leverage the advantages of spray drying technology to provide efficient and environmentally friendly drying solutions for pharmaceutical, food, chemical and other industries.