In the pharmaceutical production process, compressed air is widely used in many key links because of its clean, dry, stable and precise control characteristics. Its main functions include the following aspects:
1. Power drive and equipment operation
- pneumatic tools and equipment: Compressed air provides power for pneumatic valves, pneumatic pumps, pneumatic agitators, etc., and drives these equipment to complete the transportation, mixing, and packaging of materials. For example, in the filling production line, the pneumatic pump can accurately control the filling amount of the liquid medicine; in the packaging process, the pneumatic manipulator can achieve high-speed and accurate bottle cap tightening or label pasting.
- automatic control: Pneumatic actuators driven by compressed air (such as air cylinders and pneumatic valves) realize automatic control of the production line, such as material sorting, conveyor belt start and stop, equipment switch, etc., to improve production efficiency and consistency.
2. Material conveying and mixing
- powder conveying in the production of solid preparations (such as tablets and capsules), compressed air is used to transport bulk drugs, excipients and other powder materials to mixers, tablet presses or packaging machines through pipelines to avoid the risk of contamination caused by manual handling.
- Liquid delivery in the production of liquid preparations (such as injection and oral liquid), compressed air can drive the liquid pump or atomize, spray or clean the liquid through the nozzle.
3. Cleaning and drying
- equipment cleaning: The compressed air is used to purge the surface of the equipment, the inside of the pipeline or the packaging container after being filtered to remove the residual materials, dust or moisture and ensure the cleanliness of the production environment. For example, use compressed air to dry the inside of the glass bottle before filling to prevent water stains from affecting the quality of the liquid medicine.
- drying process: In spray drying, fluidized bed drying and other processes, compressed air is used as a heat carrier or drying medium to accelerate the evaporation of water in the material and improve the drying efficiency.
4. Packaging and Sealing
- bottle Blowing and Forming: In the production of plastic bottles or ampoules, compressed air is used for blow molding to blow the heated plastic particles into a container of a specific shape.
- Air tightness detection: By filling compressed air into the packaging container (such as medicine bottle, aluminum foil bag), check its tightness, to ensure that the drug is not contaminated during storage and transportation.
- Packaging assistance in labeling, carting and other links, compressed air can drive vacuum suction cups or pneumatic clamps to achieve precise labeling or rapid carting of drugs.
5. Process control and reaction support
- fermentation and biological reaction: In biopharmaceuticals, compressed air (strictly filtered) is used to ventilate the fermentation tank to provide oxygen for microorganism or cell culture, and at the same time to promote uniform distribution of nutrients through stirring.
- Pressure control: In the reaction kettle or distillation tower, compressed air can adjust the system pressure to ensure stable reaction conditions and improve product yield.
6. Safety and environmental protection
- fire protection and explosion protection: In flammable and explosive environments, compressed air (such as nitrogen) can be used for inert gas protection to prevent oxidation or explosion risks.
- Exhaust gas treatment: In the exhaust gas purification system, compressed air can drive the spray tower or filter device to remove harmful gases or particulate matter generated during the production process.
Key requirements: cleanliness and stability
the pharmaceutical industry has very high quality requirements for compressed air, which must meet the following criteria:
- oil-free, dust-free, sterile: Remove oil, particles and microorganisms through multi-stage filtration (such as activated carbon filter, oil removal filter, sterile filter) to prevent contamination of drugs.
- dryness: Control the dew point temperature to avoid equipment corrosion or drug deterioration caused by moisture.
- Pressure stability: Ensure that the pressure fluctuation during the production process is within the allowable range to avoid affecting the process parameters.
Summary
compressed air plays the role of "invisible assistant" in pharmaceutical production. From power drive to process control, from cleaning and drying to packaging sealing, its application runs through the entire production chain. Through strict quality control, compressed air not only ensures the safety and effectiveness of drugs, but also promotes the automation and intelligent development of the pharmaceutical industry.
