Stainless Steel Double Effect Evaporator is an advanced, energy-efficient system designed for concentrating solutions by removing a significant portion of the solvent, typically water, through evaporation. It operates on the principle of reusing the vapor produced in one stage (the “first effect”) to provide heat for the subsequent stage (the “second effect”).
| Model | SJN II 500 | SJN II 1000 | SJN II 1500 | SJN II 2000 | |
| Clean Water Evaporation Capacity kg/h | 500 | 1000 | 1500 | 2000 | |
| Steam Consumption kg/h | ≤250 | ≤500 | ≤750 | ≤1000 | |
| Overall Size | 4×1.5×3.3 | 5×1.6×3.5 | 6×1.6×3.7 | 6.5×1.7×4.3 | |
| Cooling Water Circulation
Consumption T/h |
20 | 40 | 60 | 80 | |
| Evaporation Temperature ℃ | 1-effect | 75-85 | Vacuum Degree MPa | 1-effect | -0.04-0.05 |
| 2-effect | 55-65 | 2-effect | -0.06-0.07 | ||
| Steam Pressure MPa | <0.25 | Concentration Ratio | 1.2-1.25 | ||
Multi-Effect Thermodynamics: The core technology involves connecting two evaporator bodies in series under different vacuum levels. The first effect uses fresh steam. The vapor from the first effect’s boiling liquid becomes the heating medium for the second effect, which operates at a lower boiling point due to higher vacuum.
Thermal Vapor Recompression (TVR): An advanced option where a steam jet thermo-compressor is used to recompress a portion of the vapor from the effects, elevating its pressure and temperature so it can be reused as heating steam, further improving efficiency.
Energy-Saving Heat Exchangers: High-efficiency plate or tubular heat exchangers maximize heat transfer surface area, improving the overall heat transfer coefficient and reducing energy requirements.
Forced Circulation (Optional Configuration): For heat-sensitive or fouling-prone materials, a forced circulation pump is used to maintain high flow velocity through the heat exchanger, preventing scaling and minimizing residence time.
Integrated PLC Control System (Optional Configuration): A fully automated Programmable Logic Controller (PLC) with a touch-screen HMI (Human-Machine Interface) precisely controls temperature, pressure, vacuum, flow rates, and density. It allows for recipe storage, automated CIP cycles, and data logging for full traceability.
High Energy Efficiency: Reduces steam consumption by approximately 50% compared to a single-effect evaporator, leading to substantial operational cost savings.
Superior Material: Manufactured from 316L or 304 stainless steel, ensuring excellent resistance to corrosion, product contamination, and ease of cleaning.
Hygienic Design: Features sanitary polishing (Ra ≤ 0.8 µm), CIP spray balls, and minimal dead legs for easy sterilization, making it ideal for GMP-regulated industries.
Flexible Configuration: Can be designed as a falling film, forced circulation, or hybrid system to handle a vast spectrum of viscosities and product sensitivities.
Compact & Modular Design: Engineered for optimal space utilization and relatively easy installation.
Environmentally Friendly: Lower steam consumption translates to a reduced carbon footprint and less water required for cooling.
Complete Automation (Optional Configuration): The PLC-based system allows for continuous, unattended operation, ensuring consistent product quality and reducing labor costs.
Food & Beverage: Concentrating fruit juices, milk, tea extracts, sugar syrups, and natural flavors.
Pharmaceutical & Biotechnology: Concentrating herbal extracts, purification of APIs, and recovering solvents from process streams.
Chemical Industry: Concentrating acids, alkalis, inorganic salts, and organic compounds.
Wastewater Treatment & Zero Liquid Discharge (ZLD): Pre-concentrating industrial effluent to reduce volume before further treatment like crystallization, significantly reducing disposal costs.
Environmental Protection: Recycling of process water and recovery of valuable by-products from waste streams.
Lower Operational Expenditure (OPEX): The significant reduction in steam consumption provides a rapid return on investment (ROI), making it the most cost-effective solution for medium to high-capacity evaporation needs.
Uncompromised Product Quality: Gentle evaporation under vacuum preserves heat-sensitive components, ensuring the end product’s color, aroma, and nutritional value are maintained.
Reliability & Durability: The robust stainless steel construction and intelligent design ensure high uptime, long service life, and minimal maintenance requirements.
Expert Support: We provide not just equipment but a complete solution, including process design, installation guidance, commissioning, and after-sales technical support.
The double-effect vacuum concentrator is an energy-saving natural circulation heating evaporation and concentration equipment, which can quickly evaporate and concentrate a variety of liquid materials at low temperature under vacuum negative pressure, effectively increasing the concentration of liquid materials. This equipment is suitable for the low-temperature concentration of some heat-sensitive materials and the recovery of organic solvents such as alcohol. It has obvious characteristics such as energy saving, high efficiency and wide application. It is used in many fields such as biopharmaceutical, food and beverage, fine chemical industry, environmental protection engineering, etc. The user can choose the technical parameter series condenser according to the concentrated volume.
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