Single-Effect Evaporator | Concentration Equipment Specifically Designed for Vacuum-Processed, Low-Temperature, Heat-Sensitive Materials
💡To address common challenges such as the decomposition of heat-sensitive pharmaceutical solutions during high-temperature concentration, the loss of essential oils, and the inactivation of proteins and peptides, single-effect evaporators utilize low-temperature evaporation under negative pressure, to gently concentrate solutions at 40–70°C, preserving active and volatile components. It is suitable for GMP-compliant concentration production of volatile oils in traditional Chinese medicine, enzyme preparations, and biopeptides.
I. Industry Challenges
In pharmaceutical manufacturing, many liquid formulations contain components such as essential oils, heat-sensitive proteins, bioactive peptides, and enzymes that are prone to inactivation at high temperatures. Traditional concentration equipment (such as atmospheric-pressure concentration or conventional single-effect systems) operates at relatively high temperatures, which can easily lead to the decomposition, oxidation, and volatilization of active ingredients, resulting in a significant reduction in therapeutic efficacy. Striking a balance between “rapid concentration” and “preserving bioactivity” is the core challenge in processing heat-sensitive materials.
II. Solutions
Single-Effect Evaporator — Vacuum, Low Temperature, No Loss of Activity
Single-effect evaporators utilize the principle of vacuum low-temperature concentration. By reducing the pressure in the evaporation chamber, they enable the medicinal solution to boil and evaporate at a lower temperature (typically 40–70°C), rapidly removing moisture while maximizing the retention of the activity of heat-sensitive components and volatile aromatic substances. The equipment offers flexible operation and precise temperature control, making it the ideal concentration solution for pharmaceutical solutions containing essential oils and heat-sensitive components.
III. Core Strengths
✅ Negative-Pressure Vacuum Cryogenic Evaporation
The vacuum range is controllable from -0.06 to -0.09 MPa, and the evaporation temperature can be as low as 40–60 °C, thereby preventing the degradation of active ingredients caused by high temperatures at the process source.
✅ Fully preserves heat-sensitive active ingredients
Under low-temperature, sealed conditions, volatile oils, heat-sensitive proteins, and peptides are less prone to oxidative degradation; the concentrated extract has a clear, translucent color and retains its authentic flavor, and the yield of active ingredients is significantly increased.
✅ Fast concentration rate, optimized energy consumption
The vacuum environment enhances evaporation efficiency. An optional waste heat recovery system is available, which achieves energy savings of 30% or more compared to traditional atmospheric concentration, balancing concentration efficiency with production costs.
✅ Flexible and adjustable process parameters
Based on the viscosity and foaming properties of the solution, as well as its heat-sensitive critical point, the vacuum level, feed flow rate, and evaporation temperature can be freely adjusted to accommodate a wide variety of complex materials.
✅ Clean design that complies with GMP cleaning standards
The unit features a compact design and comes standard with a sight glass, a sterile sampling port, and a CIP cleaning connection, allowing for disassembly and cleaning without leaving any hard-to-reach areas, in compliance with pharmaceutical clean production standards.
IV. A Comparative Analysis of Single-Effect and Triple-Effect Concentration
| Dimensions of Comparison | Triple-Effect Evaporator | Single-effect evaporator |
| Suitable Materials | Heat-resistant bulk extracts, raw extracts of root and rhizome-based traditional Chinese medicines | Heat-sensitive materials, pharmaceutical solutions containing essential oils, peptides, and enzymes |
| Evaporation Temperature | First stage: 70–90°C; final stage: 50–60°C | Flexibly adjustable throughout the 40–70°C range |
| Energy Efficiency | Excellent energy-saving performance and extremely low steam consumption | Good energy efficiency, superior to traditional atmospheric-pressure concentration |
| Retention of Thermosensitive Components | The high-temperature section is prone to wear and tear and is compatible only with heat-resistant materials. | Excellent activity and retention of essential oils in low-temperature environments |
| Equipment Investment | The equipment is large, and the initial investment is relatively high. | Simpler structure, lower investment costs |
| Model Selection and Positioning | Large-Scale Concentration of Heat-Resistant Materials in Bulk | Precision Concentration of High-Value-Added Thermosensitive Materials |
Production lines can be configured as follows: heat-resistant chemical solutions are processed through a triple-effect system for energy-saving mass production, while heat-sensitive and valuable chemical solutions are processed through a single-effect, low-temperature system to preserve their activity, thereby achieving dual benefits of energy savings and improved quality across the entire line.
V. Typical Application Scenarios
✅ Concentration of herbal extracts containing essential oils
Concentrated extracts of aromatic herbs such as peppermint, angelica, and perilla are produced through low-temperature, sealed concentration to lock in their natural essential oils, ensuring the efficacy and aroma of the final product.
✅ Purification and Concentration of Peptide and Protein-Based Solutions
Low-temperature dehydration of feed solutions such as thymosin and hydrolyzed collagen helps prevent protein denaturation and precipitation caused by high temperatures, thereby ensuring biological activity.
✅ Concentration of Enzyme Preparation Fermentation Broth
Gently removes free moisture while fully preserving enzyme activity, thereby optimizing the efficiency of subsequent spray drying and formulation processing.
✅ Concentration of Bioreactor Supernatant
Antibacterial peptides, alkaloids, and other heat-sensitive metabolites are concentrated at low temperatures to prevent the inactivation of active components due to heat.
VI. Summary of the Proposal’s Value
The single-effect concentrator is custom-designed for high-value, heat-sensitive materials. By leveraging vacuum-assisted low-temperature processing, it overcomes the industry-wide challenge that “concentration requires high temperatures, and high temperatures inevitably lead to loss of activity,” ensuring that pharmaceutical solutions containing essential oils, peptides, and enzymes retain full activity and excellent quality after concentration. Capable of operating as a standalone unit or integrating with triple-effect evaporators to form flexible concentration production lines, it is the preferred equipment for concentrating heat-sensitive raw materials used in traditional Chinese medicine aromatic preparations and biopharmaceuticals, helping companies develop high-activity, high-quality, and differentiated products.
🔗 Recommended Compatible Devices
Reference Guide for Selecting Production Line Equipment:
✅ Front-end Extraction Section:Tank Extraction Equipment
✅ Pretreatment for clarifying the feed solution:Filtration and Impurity Removal Equipment
✅ Back-end Refining and Purification:Chromatography Purification Equipment