Welcome: Yiwu Weihao Machinery Equipment Company
Double-effect Falling Film Evaporator
Yiwu Weihao Machinery Equipment Factory specializes in double-effect falling film evaporators, the ideal solution for industrial concentration processes requiring high efficiency and energy savings. By utilizing the principle of secondary steam recycling, our equipment reuses the heat from evaporated steam across two effect stages, drastically reducing external energy input and operational costs. The falling film design ensures gentle processing, making it suitable for both heat-sensitive and non-heat-sensitive liquids, while maintaining consistent product quality and high throughput.
Pre-treatment: Raw liquid (juice, milk, wastewater, chemical solution, etc.) is pre-filtered and preheated to the optimal temperature to reduce viscosity and ensure uniform feeding.
Film Formation: The preheated liquid is evenly distributed onto the inner walls of vertical heating tubes in the first effect, forming a thin falling film that maximizes heat transfer efficiency.
Double-effect Steam Recycling: The liquid boils under vacuum in the first effect, generating secondary steam. This secondary steam is then used as the heating source for the second effect, where the process repeats—the second effect operates at a lower pressure and temperature, reusing heat from the first stage.
Gentle Concentration: Operates under low vacuum (-0.05 to -0.095 MPa) and low temperature (45-80°C), with short residence time (2-8 seconds) to avoid product degradation, especially for heat-sensitive materials.
Continuous Discharge: Concentrated product is continuously discharged from the second (final) effect, with adjustable concentration ratios (1.5:1 to 12:1) to meet diverse application requirements. Condensed water from each effect is collected for recycling or safe discharge.
Outstanding Energy Savings: Recycles secondary steam across two effects, reducing steam consumption by 30-50% compared to single-effect evaporators, significantly lowering operational costs and carbon footprint.
Gentle & High-Quality Processing: Low-temperature, short residence time operation preserves the natural flavor, color, nutrients (for food/beverage) and chemical stability (for chemical/pharmaceutical) of the processed liquid.
High Throughput & Efficiency: Falling film design ensures high heat transfer coefficient, enabling fast evaporation rates and stable continuous operation, with customizable capacity to meet large-scale industrial needs.
Versatile & Adaptable: Suitable for a wide range of liquids, including fruit/vegetable juice, milk, herbal extracts, chemical solutions, wastewater, and more. The fixed double-effect configuration balances efficiency and cost-effectiveness for most industrial scenarios.
Hygienic & Compliant: Contact parts made of 316L/304 food-grade stainless steel, fully compliant with FDA, GMP, ISO 9001 and ISO 22000 standards. Equipped with CIP (Clean-in-Place) system for easy sanitation.
Stable & Easy to Operate: PLC + HMI automatic control system, real-time monitoring of temperature, pressure, flow rate and concentration. Simple operation, low maintenance, and reliable performance for long-term use.
Material | 316L/304 Stainless Steel |
Number of Effects | 2 Effects (Fixed Configuration) |
Evaporation Capacity | 50–5000 L/h (Customizable) |
Evaporation Temperature | 45–90°C |
Heating Method | steam heating |
Widely applied in multiple industries for large-scale liquid concentration, including: Food & Beverage (fruit juice, vegetable juice, milk, condensed milk, syrup, honey); Pharmaceutical & Biotechnology (herbal extracts, API purification, fermentation broth); Chemical Industry (salt solution, organic solvent concentration, chemical reagent processing); Environmental Engineering (industrial wastewater concentration, zero-liquid-discharge systems); and other fields requiring efficient, energy-saving evaporation.
We provide one-stop solutions for your double-effect falling film evaporator needs: custom design based on your liquid type, concentration requirements, capacity and site constraints; professional manufacturing with strict quality control; on-site installation and commissioning; staff training; and lifelong after-sales maintenance. Free technical consultation, sample test and quotation are available—contact us for more details.
