What is the scope of application for the hot reflux extraction and concentration unit?

The hot reflux extraction and concentration unit is suitable for the extraction, concentration, paste collection, percolation, volatile oil extraction, and alcohol recovery of thermosensitive materials such as animals and plants, traditional Chinese medicine, and food additives. The hot reflux extraction and concentration unit has the following characteristics: first, large feeding amount; second, good process adaptability and relatively high paste yield. Moreover, the hot reflux extraction and concentration unit has low energy consumption, high degree of automation, simple operation, and convenient maintenance.

Working principle of hot reflux extraction concentrator

The hot reflux extraction and concentration unit generally consists of an extraction tank, a cooler, a tubular condenser, a heater, a reboiler, a vacuum condenser, a packed tower, an evaporator, a storage tank, a filter, and an oil-water separator. Its working principle is as follows:

The hot reflux extraction and concentration unit performs the extraction and concentration of traditional Chinese medicine simultaneously, completing the extraction and concentration of traditional Chinese medicine at once. The temperature inside the extraction tank is controlled to60~80℃The concentration temperature is controlled at50~70℃It maximizes the preservation of effective ingredients in traditional Chinese medicine from evaporation and loss. The steam generated by extraction and concentration will be condensed and recovered, and then added to the medicinal herbs as a new solvent. The new solvent will pass through the medicinal herb layer from top to bottom, and once again play a role in percolation. Under the action of vacuum low-temperature vaporization heat, the larger the concentration difference, the higher the extraction rate of effective ingredients.

Usage of Yideli Hot Reflux Extraction and Concentration Unit: Mix Chinese herbal medicine with water1:10Mixing, the height of the aqueous solution is about the main tank2/3It is advisable to maintain sufficient evaporation space for the material, which is conducive to accelerating the evaporation rate. At this time, control the pressure inside the jacket0.09MPaAt the same time, slightly open the outlet valve for the condensate water under the jacket to discharge exhaust gas and condensate water to maintain a constant steam pressure, and then enter the boiling process.

When the main tank liquid boils, open the secondary steam inlet valve that enters the condenser from the main tank, and close the secondary steam inlet valve that enters the condenser from the evaporator. Open the cold water inlet valves of the condenser and cooler for atmospheric circulation extraction. Heating the medicine inside the extractor40-50After minutes, open the outlet valve of the extractor and turn on the vacuum pump. The medicine is filtered through the pipeline and sucked into the concentration evaporator. Open the heating inlet valve to adjust the inlet pressure, and open the secondary steam inlet valve from the evaporator to the condenser. The secondary steam generated by concentration passes through the demister of the concentration evaporator and condenses with the steam generated inside the extractor, and finally flows back to the extractor. The hot solvent is continuously circulated and used. After the solute is completely dissolved, the main tank jacket inlet valve is closed, and the secondary steam inlet valve from the main pipe to the condenser is closed. The secondary steam generated by the evaporator concentration is directly condensed and cooled by the condenser, and continues to be concentrated and recovered until it is concentrated into a paste and discharged