There are many types of spray dryers. Common types include centrifugal spray dryers, pressure spray dryers, airflow spray dryers, and spray dryers for traditional Chinese medicine extracts.
Centrifugal spray dryer
Under the condition that the sticky wall can be better solved, the centrifugal spray dryer is a drying equipment suitable for the drying of traditional Chinese medicine extract. Some equipment companies have modified the centrifugal spray dryer, which has both process changes and host structure reforms.
The centrifugal spray dryer has a fast drying speed, and the surface area of ​​the liquid is greatly increased after atomization. In the hot air flow, 95%-98% of the water can be evaporated instantaneously, and the drying time is only a few seconds, which is especially suitable for heat sensitive materials. Dry. In addition, the equipment dried by the centrifugal spray dryer has good uniformity, fluidity and solubility, and the product has high purity and good quality.
Not only that, the centrifugal spray dryer also simplifies the production process and facilitates operation and control. For liquids with a moisture content of 40-60% (up to 90% of special materials), it can be dried into powdered products at one time, which is convenient for control and management.
Pressure spray dryer
A pressure spray dryer is a device that can simultaneously perform drying and granulation. According to the process requirements, the pressure, flow rate and orifice size of the liquid pump can be adjusted to obtain the desired spherical particles in a certain proportion.
The pressure spray dryer has a fast drying speed, and the surface area of ​​the liquid is greatly increased after atomization. In the hot air flow, 95-98% of the water can be evaporated instantaneously, and the drying time takes only ten to several tens of seconds, especially Suitable for drying heat sensitive materials. The product obtained by the pressure spray dryer is spherical particles with uniform particle size, good fluidity, good solubility, high purity and good quality.
In addition, the pressure spray dryer is also widely used. According to the characteristics of the material, it can be dried by hot air or cold air, and has strong adaptability to materials. The operation is simple and stable, the control is convenient, and the easy operation of the automation is also a major feature of the device.
Airflow spray dryer
Airflow spray dryers, also known as instant dryers, are particularly suitable for use in solutions, emulsions, pastes, suspensions and even viscous materials. The reason why it is called instant dryer is mainly because it can spray compressed air or water vapor from the nozzle at a speed of ≥300m/s, and the friction generated by the speed difference between gas and liquid makes the liquid material Separate into small droplets.
The author understands that airflow spray drying mainly discharges air or water vapor from the nozzle through high speed, and separates the liquid into small droplets by friction, so that it completely contacts with hot air to form heat exchange, and the whole process is less than half. minute. The airflow spray dryer works well for highly viscous materials, which is unmatched by other spray dryers, and is also very convenient to operate.
Special spray dryer for traditional Chinese medicine extract
The special spray dryer for traditional Chinese medicine extract is a spray drying equipment specially designed to solve the problem of drying of Chinese medicine extract and plant extract. This machine can effectively solve the problems of related equipment in the drying of traditional Chinese medicine extract. The traditional Chinese medicine extract powder dried by the machine will not cause coking and deterioration, which greatly increases the yield (more than 95%) and avoids mixed drug pollution.
In order to prevent the material from sticking to the wall, the special spray dryer for traditional Chinese medicine extract is equipped with air sweeping wall and tower wall jacket cooling structure, which can effectively prevent the cohesive coking of the product and improve product quality and yield. The unique finished air delivery system can separate the dried product from the hot humid air in the system in time to avoid the possibility of moisture absorption and moisture agglomeration.
Centrifugal spray dryer
Under the condition that the sticky wall can be better solved, the centrifugal spray dryer is a drying equipment suitable for the drying of traditional Chinese medicine extract. Some equipment companies have modified the centrifugal spray dryer, which has both process changes and host structure reforms.
The centrifugal spray dryer has a fast drying speed, and the surface area of ​​the liquid is greatly increased after atomization. In the hot air flow, 95%-98% of the water can be evaporated instantaneously, and the drying time is only a few seconds, which is especially suitable for heat sensitive materials. Dry. In addition, the equipment dried by the centrifugal spray dryer has good uniformity, fluidity and solubility, and the product has high purity and good quality.
Not only that, the centrifugal spray dryer also simplifies the production process and facilitates operation and control. For liquids with a moisture content of 40-60% (up to 90% of special materials), it can be dried into powdered products at one time, which is convenient for control and management.
Pressure spray dryer
A pressure spray dryer is a device that can simultaneously perform drying and granulation. According to the process requirements, the pressure, flow rate and orifice size of the liquid pump can be adjusted to obtain the desired spherical particles in a certain proportion.
The pressure spray dryer has a fast drying speed, and the surface area of ​​the liquid is greatly increased after atomization. In the hot air flow, 95-98% of the water can be evaporated instantaneously, and the drying time takes only ten to several tens of seconds, especially Suitable for drying heat sensitive materials. The product obtained by the pressure spray dryer is spherical particles with uniform particle size, good fluidity, good solubility, high purity and good quality.
In addition, the pressure spray dryer is also widely used. According to the characteristics of the material, it can be dried by hot air or cold air, and has strong adaptability to materials. The operation is simple and stable, the control is convenient, and the easy operation of the automation is also a major feature of the device.
Airflow spray dryer
Airflow spray dryers, also known as instant dryers, are particularly suitable for use in solutions, emulsions, pastes, suspensions and even viscous materials. The reason why it is called instant dryer is mainly because it can spray compressed air or water vapor from the nozzle at a speed of ≥300m/s, and the friction generated by the speed difference between gas and liquid makes the liquid material Separate into small droplets.
The author understands that airflow spray drying mainly discharges air or water vapor from the nozzle through high speed, and separates the liquid into small droplets by friction, so that it completely contacts with hot air to form heat exchange, and the whole process is less than half. minute. The airflow spray dryer works well for highly viscous materials, which is unmatched by other spray dryers, and is also very convenient to operate.
Special spray dryer for traditional Chinese medicine extract
The special spray dryer for traditional Chinese medicine extract is a spray drying equipment specially designed to solve the problem of drying of Chinese medicine extract and plant extract. This machine can effectively solve the problems of related equipment in the drying of traditional Chinese medicine extract. The traditional Chinese medicine extract powder dried by the machine will not cause coking and deterioration, which greatly increases the yield (more than 95%) and avoids mixed drug pollution.
In order to prevent the material from sticking to the wall, the special spray dryer for traditional Chinese medicine extract is equipped with air sweeping wall and tower wall jacket cooling structure, which can effectively prevent the cohesive coking of the product and improve product quality and yield. The unique finished air delivery system can separate the dried product from the hot humid air in the system in time to avoid the possibility of moisture absorption and moisture agglomeration.
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