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In modern process engineering, industrial evaporation is a key unit operation critical to product concentration, byproduct recovery, and waste volume reduction. The global transition toward decarbonization, strict zero-liquid-discharge (ZLD) regulations, and skyrocketing energy costs have dramatically shifted technological demand. Traditional single-effect or multi-effect shell-and-tube evaporators, while reliable, are increasingly being replaced by advanced falling film configurations and mechanical vapor recompression (MVR) systems.
A falling film plate evaporator represents the pinnacle of modern thermal separation technology. Unlike conventional tube bundle evaporators, plate-type evaporators distribute liquid across highly contoured vertical plate channels, creating a continuous, ultra-thin falling film. This design dramatically enhances the overall heat transfer coefficient (U-value) while minimizing fluid hold-up time. The global commercial market for falling film plate evaporators is driven by sectors requiring gentle handling of heat-sensitive materials (such as juice concentration, biological fermentation, starch processing, and dairy concentration) and industrial wastewater treatment where scale mitigation and thermal efficiency are critical. China has emerged as the global production center for these specialized systems, combining sophisticated ASME-compliant metallurgy with competitive manufacturing dynamics.
The engineering landscape for plate-type evaporative concentration is evolving rapidly across several critical axes:
Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd is a modern high-tech member enterprise of the China Starch and Alcohol Association, offering world-class thermal separation installations.
Years of Experience
Professional Engineers
Factory Areas (m²)
Production Plant Area (m²)
Selecting the appropriate heat exchanger structure is vital for optimizing process efficiency. The table below outlines the core thermodynamic and mechanical differences between falling film plate and traditional shell-and-tube evaporators.
| Performance Indicator | Falling Film Plate Evaporator | Shell-and-Tube Evaporator |
|---|---|---|
| Heat Transfer Efficiency (U-Value) | High (3,000 - 4,500 W/m²K) | Moderate (1,500 - 2,500 W/m²K) |
| Residence Time (Thermal Stress) | Ultra-short (Seconds to minutes, preventing product degradation) | Longer (Higher hold-up volume inside tubes) |
| Maintenance & Cleaning | Excellent (Frame expands for easy mechanical wash/CIP) | Difficult (Requires chemical baths or complex tube drilling) |
| Physical Footprint | Compact (High heat surface density in plate pack) | Large (Requires tall structural frames & headroom) |
| Wetting Rate Sensitivity | Critical (Requires precision gravity distribution) | Moderate (Dependent on feed nozzle pressure) |
| Scalability | Simple (Add plates to the frame layout) | Fixed (Requires complete vessel replacement) |
At Jiangsu Zongheng, we do not simply supply stand-alone evaporators. We engineer fully integrated process loops designed to minimize thermal losses and maximize byproduct value. A typical application is the concentration of corn steep liquor (CSL) and wastewater streams within the corn wet milling and starch industries.
In this workflow, our Single Screw Press first mechanically dewaters corn fiber and germ. The resulting high-moisture solids are directed to a ZXG Tube Bundle Dryer or MQG Airflow Dryer. The vapor generated from these drying processes is not lost to the atmosphere; instead, it is captured by our Waste Heat Evaporator system. This system acts as a low-temperature energy source to preheat and pre-concentrate the thin liquid feed before it enters the main Falling Film Plate Evaporation Loop. This integration reduces plant steam consumption, lowering overall production costs.
Utilizes Mechanical Vapor Recompression to recycle latent heat of vaporization, reducing fresh steam consumption by up to 90% and slashing operating costs.
Designed for highly viscous, crystallizing, or high-salinity liquids. High fluid velocities within the exchanger prevent fouling on heat-transfer surfaces.
Integrates with bundle dryers and airflow flash systems to recover waste steam, turning thermal exhaust into secondary energy sources.
From our founding as Yixing Yangxi Light Industry Machinery Factory in 1992 to becoming an ASME-certified global supplier, here is our journey of engineering innovation.
Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd is located in Zhoutie Town, Yixing City, on the shores of Taihu Lake. We specialize in manufacturing concentration, drying, starch industry, bio-ethanol, and Category III medium & low-pressure vessel equipment. Our products are widely used in chemical, food, pharmaceutical, and environmental protection sectors worldwide.
Our facility spans 54,000+ square meters, including 22,000+ square meters of workshop area. The company employs 3 senior engineers, over 20 engineers, and a dedicated production team of 120 professionals.
Obtained international quality system certification (Certificate No.: 45021), establishing a complete quality assurance system aligned with international industrial standards.
Acquired the ASME "U" Stamp authorization, validating our thermal design and manufacturing quality for high-pressure industrial equipment.
Obtained the Special Equipment Manufacturing License of the People's Republic of China (License No.: TS2232C42) for vessel manufacturing.
Established as Yixing Yangxi Light Industrial Machinery Factory, covering 15 mu and starting with 45 pioneering employees.
Our evaporation and drying solutions are installed globally in demanding environments, delivering continuous performance.
In addition to plate-type thermal concentration, Jiangsu Zongheng manufactures a comprehensive range of process drying and solid-liquid separation machinery, providing integrated solutions from raw feed to dry product packaging.
Our MQG Airflow Dryer utilizes high-speed hot air to suspend and fluidize wet materials during transport. By using impulse airflow channels with alternating tube diameters, it generates turbulence that continuously tumbles wet solids as they move. This ensures rapid and uniform moisture extraction, making it suitable for starch, corn fiber, and biological materials.
Designed for safe and indirect steam drying, the ZXG Tube Bundle Dryer operates at low speeds under low-oxygen conditions. High-pressure steam flows inside the rotating tube bundle, transferring heat through the tube walls to the material rolling in the shell. This configuration prevents thermo-sensitive degradation, making it suitable for starch processing, chemical plants, and bio-refinery installations.
For high-purity starch refining and fiber separation, our YDX Starch Washing Cyclone provides high-velocity centrifugal separation. The multi-stage cyclone configuration eliminates fine impurities, proteins, and soluble starches, ensuring high quality in wet corn milling processes.
Expert answers to common engineering questions regarding the design, operation, and maintenance of plate-type falling film evaporators.
Explore our dryers, cyclones, waste heat recuperators, and high-efficiency systems designed to optimize your process line.
Consult with our process engineers to customize a Falling Film Plate Evaporator or MVR system tailored to your technical requirements. We welcome international partners for long-term collaboration.
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