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The Double / Multi Effect Falling Film Concentrator unit is a combined extraction and concentration unit, which is suitable for the extraction, concentration, ointment collection, percolation, volatile oil extraction and alcohol recovery of heat-sensitive materials such as plants, animals, traditional Chinese medicine, and food additives to meet the needs of institutions of higher learning, Scientific research institutions, hospitals, etc. are used for extraction of new drugs, determination of technical parameters of new processes, intermediate tests, development of new varieties, extraction of precious medicinal materials and concentration of medicinal liquids. The double-effect evaporator has one more set of heaters and evaporators than the single-effect evaporator, and its evaporation efficiency is higher, and the double-effect evaporator is also more energy-saving.
| Extraction tank solvent (m³) | 0.5 | 1 | 2 | 3 | 6 |
| Concentrator evaporation capacity (L) | 250 | 500 | 800 | 1000 | 2000 |
| Extraction temperature (°C) | Single Effect: 80~90 | ||||
| Double Effect: 60-70 | |||||
| Extraction time | 6~8h/batch | ||||
| Vacuum (MPa) | Single Effect: 0.04 | ||||
| Double Effect: -0.06 | |||||
| Design pressure (MPa) | 0.09~0.3 | ||||
Put the prepared prescription medicinal materials into the extraction tank, add 5-10 times the amount of solvent at one time (the nature of the solvent and the amount added are according to the process requirements) and soak for a certain period of time, then open the steam valve to heat, (direct steam heating only water extraction and extraction of aromatic oil) After the set time is boiled and extracted, the higher temperature extract can be continuously filtered from the bottom of the extraction tank through the filter to the filter and then into the concentrator. The steam generated during concentration enters the condenser and becomes condensate, which is sprayed into the extraction tank as a new solvent; the secondary steam generated in the extraction tank is cooled and tightened by the condenser to form a condensate, which falls back into the extraction tank. All the steam generated by the solvent is turned into condensate and returned to the extraction tank through heat exchange. The secondary steam is fully utilized in the process to form a new solvent for large reflux extraction. Therefore, the solute and solvent in the medicinal material always maintain a high-gradient mass transfer. High speed dissolution. Therefore, this set of equipment has excellent performance in terms of energy saving and maintaining solvent balance. The new solvent dissolves the soluble matter in the medicinal material through the medicinal material layer from top to bottom to the bottom of the extraction tank, and then is drawn into the concentrator. Repeat the above process, so that the formed solvent is extracted--concentrated (recovered) and returned several times, and the extract is colorless. At this time, the secondary vapor condensed liquid enters the extraction tank, enters the storage tank or discharges. The concentrator continues to concentrate until it reaches the liquid extract with a specific gravity (1.1-1.25), and releases it for later use.
The Double / Multi Effect Falling Film Concentrator is suitable for herbal medicine, Chinese herbal medicine, animal medicine, food additive, etc. Use water, ethanol, methanol, acetone, etc. to extract and recover and concentrate organic solvents.
This unit is a combined extraction and concentration system primarily used for processing heat-sensitive materials. It is widely used in institutions, hospitals, and scientific research to extract, concentrate, collect ointment, and recover alcohol from plants, animal products, traditional Chinese medicines, and food additives.
Traditional processes usually require multiple extractions followed by a separate concentration phase. This concentrator combines both extraction and concentration into one simultaneous operation within a single set of equipment. This integration reduces overall production time by about 50%, completing a batch in just 6 to 8 hours.
The double-effect design includes an extra set of heaters and evaporators, allowing it to use secondary steam generated during concentration as a direct heat source for the extraction tank. This recycling saves more than 60% of steam. Additionally, the sealed system recovers and recycles the solvent (with a loss rate below 5%), reducing solvent input by 60% and greatly lowering operating costs.
Yes, it significantly improves both yield and quality. Because the solvent is continuously recycled in a large reflux cycle, a high concentration gradient is maintained between the medicinal material and the solvent. This rapid dissolution process increases the ointment yield by 10% to 20% compared to traditional techniques and can double the concentration of active medicinal ingredients.
Absolutely. The entire equipment operates under negative pressure (vacuum). This allows the extraction temperature to be safely maintained between 60°C and 90°C (e.g., 60-70°C for double-effect operation). Operating at these lower boiling points is ideal for extracting heat-sensitive materials and prevents the thermal degradation or polymerization of delicate active ingredients.
