Product Introduction
Device features
1. The production time has been shortened by 50%. Traditional processes involve multiple extraction steps followed by concentration. In contrast, this process combines the two concentration and extraction steps into a single unit, completing the entire operation in just (6-8) hours.
2. Save more than 60% of steam; the secondary steam generated within the concentrator can directly serve as a heat source for heating the extraction tank, and the medicinal liquid enters the concentrator at a relatively high temperature, resulting in very little heat loss.
3. The amount of solvent used has been reduced by 60%. In the extraction tank, the medicinal materials only need to be added with solvent once, and the solvent is then circulated within a sealed system. Virtually all of the solvent used in the extraction process—whether in the form of residue or vaporized liquid—is recovered (with a loss rate below 5%). As a result, the solvent consumption is low, operating costs are significantly reduced, and production costs have dropped substantially.
4. The recovery rate of the extract can be increased by 10% to 20% compared to traditional processes, and the content of active pharmaceutical ingredients is significantly enhanced—often increasing several times over. Since the solvent injected in one go enables a large-scale reflux circulation, the concentration gradient of solutes in the medicinal materials and in the solvent remains consistently high. As a result, solutes in the medicinal materials dissolve rapidly. Both the recovery rate of the extract and the yield of active ingredients show a marked increase, laying a solid foundation for the qualitative and quantitative identification of the drug.
5. Multi-function in one machine (separate extraction, separate concentration, and simultaneous extraction and concentration), featuring a compact structure and simple operation. A single operator can handle the entire set of equipment, which occupies a small footprint, eliminates the need for intermediate storage tanks, and requires low capital investment.
6. The entire set of equipment is made of imported SUS304 stainless steel and features fully sealed, piped production. This not only reduces environmental pollution but also prevents the infiltration of heavy metals and bacteria, fully complying with GMP requirements.
7. Since this equipment operates under negative pressure, the extraction temperature can be adjusted freely between 70 and 80°C, which is particularly advantageous for extracting heat-sensitive drugs and herbal materials that are prone to polymerization reactions.
Technical Specifications Table
| Parameter item | 0.5 (extraction tank volume, m³) | 1 (Extraction tank volume m³) | 2 (Extraction tank volume m³) | 3 (Extraction tank volume, m³) | 6 (Extraction tank volume m³) |
| Concentrator evaporation rate (L) | 250 | 500 | 800 | 1000 | 2000 |
| Water extraction temperature (℃) | 90–100 | ||||
| Alcohol extraction temperature (℃) | 78–83 | ||||
| Extraction time | 6–8 hours/batch | ||||
| Alcohol extraction temperature vacuum degree (MPa) | -0.05 to -0.08 | ||||
| Design pressure (MPa) | 0.09–0.3 | ||||
Working principle
The prepared medicinal herbs are placed into the extraction tank, and a solvent—5 to 10 times the weight of the herbs—is added all at once (the nature of the solvent and its quantity are determined according to process requirements). After soaking for a specified period, the steam valve is opened to initiate heating. (Direct steam heating is used only when extracting water-soluble substances or aromatic oils.) After the extraction has been carried out for the set duration, the high-temperature extract is continuously drawn from the bottom of the extraction tank, coarsely filtered through a mesh screen, and then passed into a filter before entering the concentrator. The steam generated during concentration flows into the condenser, where it condenses into a liquid that serves as fresh solvent and is sprayed back into the extraction tank. Secondary steam produced within the extraction tank is also condensed in the condenser, turning into liquid condensate that returns to the extraction tank. All steam generated by the solvent undergoes heat exchange and is converted back into liquid condensate, which is returned to the extraction tank. In this way, secondary steam is fully utilized throughout the process, creating a large-scale reflux extraction with fresh solvent. As a result, the solute in the herbs maintains a high-gradient mass transfer and achieves rapid dissolution with the solvent. Therefore, this equipment demonstrates outstanding performance in terms of energy conservation and maintaining solvent balance. The fresh solvent flows from top to bottom through the herb layer, dissolving the soluble components of the herbs and reaching the bottom of the extraction tank, where it is then pumped into the concentrator. This process repeats itself continuously. As the solvent undergoes repeated cycles of extraction and concentration (recovery), the extract eventually becomes colorless. At this point, the condensed secondary steam liquid either returns to the extraction tank, is stored in a reservoir, or is discharged. The concentrator continues concentrating until the desired specific gravity (1.1–1.25) is achieved, after which the concentrated extract is released and set aside for future use.
RH Series Thermal Reflux Extraction and Concentration Unit
Keywords:
RH Series Thermal Reflux Extraction and Concentration Unit
Henan Suoyuan Machinery Co., Ltd.
Phone
Mobile phone
Office address
19th Floor, Huaqiang Yunling, University Science and Technology Park, West Third Ring Road, Zhengzhou City
Production address
No. 218, Heshuo Avenue, Industrial Cluster Zone, Wuzhi County
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