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The vacuum drying oven originated earlier. The principle is to layer the drying box with a heating plate, and to put hot water or low-pressure steam into the heating plate as a medium, and then put the medicine tray which needs to be dried on the drying plate. Close the box door and use a vacuum pump to pump the box out of the air to form a vacuum environment. The heating plate heats the drug to a specified temperature in the circulating flow of the heating medium, and the moisture begins to evaporate and is gradually withdrawn by vacuuming. The drying equipment is easy to control, and the medicine is not easily contaminated during the drying process, and is suitable for drying the medicine and sterilizing the packaging material.
The vacuum rotary dryer is derived from a double cone mixer, which is mostly a cylindrical body and a two-headed cone. It is also commonly known as a double cone dryer. There are two hollow suspension shafts in the middle of the cone for the rotation support of the equipment and the passage of vacuum and hot water. The medicine is rotated while drying in the dryer, which guarantees the uniformity of the whole batch of the drug of the whole batch of drugs. The heat medium enters the jacket from the hollow tube at one end, and the hot gas in the device is discharged along the exhaust pipe in the hollow tube at the other end, and the volatile solvent is recovered by condensation. Because this equipment is easy to operate, easy to adjust, and can be cleaned online and sterilized online, it is the preferred dryer for small and medium-sized antibiotic raw material medicine companies, such as penicillin, lincomycin, chlortetracycline and caffeine.
Three-in-one equipment, the so-called three-in-one refers to the three processes of filtration, washing and drying. The three-in-one equipment perfectly combines these three important processes, mainly because the filter belts advance in different ways and the workflow is exactly the same. The material is evenly spread on the filter belt by the feeder, and the filter belt is dragged by the transmission device to move in the dryer. The washing and suction filtration sections are subjected to solvent washing, and the solvent mother liquor is recovered by vacuum cooling; the hot air in the drying section is entered, and the solvent is removed by vacuum distillation. It is used for batch production in large quantities. It is suitable for the drying of granular materials with good gas permeability and uniform drying of finished products. It is widely used in vitamin C and penicillin industries in China. Due to the relatively poor airtightness of the device, online cleaning and in-line sterilization cannot be well arranged, so it is only suitable for drying non-sterile bulk drugs and pharmaceutical intermediates.
The airflow drying device is suitable for particles and powdery materials that are easily dehydrated, and can quickly remove moisture (mainly surface moisture). In the airflow drying, the quality of the dried product is controlled by the good quality of the material in the dryer. The wet material is thoroughly mixed with the hot gas stream through the feeder, and is dried while entering the drying tube under wind suction while drying. The wet heavy particles that cannot be attracted by the wind continue to be struck, broken and dried in the dryer until they can be sucked up by the wind into the drying tube, and the end of the drying tube is a cyclone. This equipment is mainly used in the pharmaceutical industry for the production of oxytetracycline and some health care products.
Spray dryers work like airflow drying. After the air is initially filtered, it is heated by the heater, and the generated hot air is filtered through several stages (selected according to the grade of the medicine), and then the vortex channel at the top of the drying chamber is uniformly swirled by the hot air distributor to enter the drying chamber. The material is filtered through a centrifugal atomizing disk or a pressure nozzle to produce a dispersed, fine mist. The mist is in contact with the swirling hot air, and the moisture evaporates rapidly, and the material is dried in a very short period of time. This equipment is suitable for drying liquid materials with good fluidity such as solution, emulsion, suspension, paste, etc. Now the raw material medicine industry can be used for drying like streptomycin, gentamicin and various biological extracts. This device.
The freeze dryer is suitable for the drying of heat-sensitive or easily oxidizable drugs. It is commonly known as freeze-drying machine, mainly including freeze-drying box, vacuum system, heating system, refrigeration system and so on. The drying of the drug substance and the preparation drug is a lot of lyophilizers. It is mainly required to have high reliability and complete sterilization function. The temperature difference between the same shelf and the layer is not more than 1.5 °C [2], which requires the flatness of the shelf to be better. When using this equipment to dry the drug substance, in order to ensure the uniformity of the product, zui is good to increase the mixer. Ampicillin, a large number of blood products, artificial culture drugs, antibodies, vaccines, etc., are mostly selected from freeze-drying machines.
There are many types of dryers in the pharmaceutical industry, such as vacuum drying ovens, vacuum rotary dryers, three-in-one, airflow dryers, spray dryers, fluidized beds, fluidized beds, freeze dryers and the like. The drying device must meet the requirements of GMP, ensure the rational production process of the drug, uniform product, no accumulation of materials, can meet the requirements of online cleaning, etc. The drying device used on the aseptic bulk drug should also meet the requirements of online sterilization.
The vacuum drying oven originated earlier. The principle is to layer the drying box with a heating plate, and to put hot water or low-pressure steam into the heating plate as a medium, and then put the medicine tray which needs to be dried on the drying plate. Close the box door and use a vacuum pump to pump the box out of the air to form a vacuum environment. The heating plate heats the drug to a specified temperature in the circulating flow of the heating medium, and the moisture begins to evaporate and is gradually withdrawn by vacuuming. The drying equipment is easy to control, and the medicine is not easily contaminated during the drying process, and is suitable for drying the medicine and sterilizing the packaging material.
The vacuum rotary dryer is derived from a double cone mixer, which is mostly a cylindrical body and a two-headed cone. It is also commonly known as a double cone dryer. There are two hollow suspension shafts in the middle of the cone for the rotation support of the equipment and the passage of vacuum and hot water. The medicine is rotated while drying in the dryer, which guarantees the uniformity of the whole batch of the drug of the whole batch of drugs. The heat medium enters the jacket from the hollow tube at one end, and the hot gas in the device is discharged along the exhaust pipe in the hollow tube at the other end, and the volatile solvent is recovered by condensation. Because this equipment is easy to operate, easy to adjust, and can be cleaned online and sterilized online, it is the preferred dryer for small and medium-sized antibiotic raw material medicine companies, such as penicillin, lincomycin, chlortetracycline and caffeine.
Three-in-one equipment, the so-called three-in-one refers to the three processes of filtration, washing and drying. The three-in-one equipment perfectly combines these three important processes, mainly because the filter belts advance in different ways and the workflow is exactly the same. The material is evenly spread on the filter belt by the feeder, and the filter belt is dragged by the transmission device to move in the dryer. The washing and suction filtration sections are subjected to solvent washing, and the solvent mother liquor is recovered by vacuum cooling; the hot air in the drying section is entered, and the solvent is removed by vacuum distillation. It is used for batch production in large quantities. It is suitable for the drying of granular materials with good gas permeability and uniform drying of finished products. It is widely used in vitamin C and penicillin industries in China. Due to the relatively poor airtightness of the device, online cleaning and in-line sterilization cannot be well arranged, so it is only suitable for drying non-sterile bulk drugs and pharmaceutical intermediates.
The airflow drying device is suitable for particles and powdery materials that are easily dehydrated, and can quickly remove moisture (mainly surface moisture). In the airflow drying, the quality of the dried product is controlled by the good quality of the material in the dryer. The wet material is thoroughly mixed with the hot gas stream through the feeder, and is dried while entering the drying tube under wind suction while drying. The wet heavy particles that cannot be attracted by the wind continue to be struck, broken and dried in the dryer until they can be sucked up by the wind into the drying tube, and the end of the drying tube is a cyclone. This equipment is mainly used in the pharmaceutical industry for the production of oxytetracycline and some health care products.
Spray dryers work like airflow drying. After the air is initially filtered, it is heated by the heater, and the generated hot air is filtered through several stages (selected according to the grade of the medicine), and then the vortex channel at the top of the drying chamber is uniformly swirled by the hot air distributor to enter the drying chamber. The material is filtered through a centrifugal atomizing disk or a pressure nozzle to produce a dispersed, fine mist. The mist is in contact with the swirling hot air, and the moisture evaporates rapidly, and the material is dried in a very short period of time. This equipment is suitable for drying liquid materials with good fluidity such as solution, emulsion, suspension, paste, etc. Now the raw material medicine industry can be used for drying like streptomycin, gentamicin and various biological extracts. This device.
The freeze dryer is suitable for the drying of heat-sensitive or easily oxidizable drugs. It is commonly known as freeze-drying machine, mainly including freeze-drying box, vacuum system, heating system, refrigeration system and so on. The drying of the drug substance and the preparation drug is a lot of lyophilizers. It is mainly required to have high reliability and complete sterilization function. The temperature difference between the same shelf and the layer is not more than 1.5 °C [2], which requires the flatness of the shelf to be better. When using this equipment to dry the drug substance, in order to ensure the uniformity of the product, zui is good to increase the mixer. Ampicillin, a large number of blood products, artificial culture drugs, antibodies, vaccines, etc., are mostly selected from freeze-drying machines.
Analysis on the application of drying equipment in pharmaceutical machinery industry
There are many types of dryers in the pharmaceutical industry, such as vacuum drying ovens, vacuum rotary dryers, three-in-one, airflow dryers, spray dryers, fluidized beds, fluidized beds, freeze dryers and the like. The drying device must meet the requirements of GMP, ensure the rational production process of the drug, uniform product, no accumulation of materials, can meet the requirements of online cleaning, etc. The drying device used on the aseptic bulk drug should also meet the requirements of online sterilization.