Detailed introduction
　　1. Summary of Small Multifunctional Extraction and Concentration Units
　　Small multi-functional extraction and concentration unit is a set of small multi-functional system. The whole system can realize extraction, concentration, reaction and automatic cleaning. It is equipped with corresponding monitoring system, which can realize on-line monitoring and can be operated manually and automatically. Small multi-functional extraction and concentration unit is suitable for extracting, concentrating, solvent recovery and aromatic oil collection of Chinese herbal medicine and many kinds of plants. The whole multi-functional thermal extraction and concentration unit system developed by our company adopts full digital inspection and control technology. The automatic control can be realized in the amount of solvent, heating hot water temperature, extraction temperature, extraction time, extraction pressure, positive direction mixing time, concentration determination, etc. The process indexes of the unit can be adjusted and adjusted on-line, and can be matched according to needs. Manual, on-site control and computer centralized control are adopted; alarm, printing, storage and other functions can be installed as required; advanced on-line analysis system of material production process can be selected and equipped with special material quality control software platform to realize on-line quality control of material countercurrent extraction production process. The extracting tank can use liquid stirring according to the material, effectively avoiding the starch precipitation in the material, and the clarity of the extract is better, which creates favorable conditions for the concentration process. The oil-water separator adopts a new structure. By adjusting the outlet valve of the separated water, the liquid level of the oil in the oil-water separator can be adjusted, and the volatile oil can be continuously separated and discharged.
　　The locking device of the slag outlet of the extraction tank adopts pneumatic rotary locking device, and interlocking is realized by electrical control elements, so the operation is safe and reliable. The pneumatic sealing structure is adopted for the sealing of the slag outlet, which overcomes the leakage problem of the sealing of the slag outlet. The extraction tank can recover the volatile oil separately, and the extraction and concentration unit can extract the volatile oil separately by reflux.  The whole set of units is designed and manufactured according to the requirement of national drug GMP.
　　The whole set of equipment is made of stainless steel, with beautiful appearance, compact and reasonable structure, stable and reliable equipment, which fully meets the requirements of food and medical industry for equipment. Small over-functional extraction tank can be set up steam heating or electric heating according to customer's requirements. It can save energy and protect the environment. It is multi-purpose.
　　2. Characteristics of small multifunctional extraction and concentration unit
　　1. The equipment is mainly composed of extraction tank, external circulation single-effect concentrator and other ancillary equipment. It has compact structure, convenient operation and integrates extraction, concentration and solvent recovery.
　　2. The equipment has complete functions and is suitable for water and alcohol extraction. It can be used for atmospheric and negative pressure extraction and can recover volatile oil. Equipped with vacuum converter and control box, it is easy to operate and can realize the technological requirements of extraction at room temperature, concentration at room temperature and concentration at low temperature.
　　3. The oil-water separator is composed of two glass cylinders, which makes the oil-water separation time longer and the separation effect better. Glass material is used for easy observation.
　　4. At the same time, the high-level self-flow method was used to concentrate. The evaporated distilled water returned to the extraction tank and continued to extract. The whole reflux extraction and concentration process was about 4-6 hours. Reduce the loss of steam and solvent and shorten the operation time.
　　5. The recovered high concentration solvents go directly to the alcohol preparation tank and use as solvents for the alcohol precipitator or extraction tank, while the dilute concentration solvents go to the dilute alcohol storage tank. Solvent discharge is controlled by control box, so that it can discharge liquid automatically, reduce labor and improve solvent utilization rate.