Explore our premium product portfolio designed for starch processing, wastewater concentration, and high-solid industrial drying applications.
Premium industrial tube bundle dryers engineered for starch and agricultural fiber concentration, ensuring high heat recovery efficiency and safety.
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Advanced hydrocyclone units specifically engineered for starch washing, purification, and high-performance refining in commercial mills.
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Heavy-duty dewatering systems for high-solid sludges and fibrous waste, optimizing cake dryness and reducing thermal drying operational costs.
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Precision concentration of thermal-sensitive feed liquids with minimal residence times and outstanding heat transfer coefficients.
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State-of-the-art Mechanical Vapor Recompression (MVR) systems that recycle secondary steam to achieve unprecedented thermal efficiency.
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Advanced customized concentration lines built using durable materials for industrial fluid applications worldwide.
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Forced circulation technology built to process high-fouling materials, ensuring continuous running time and crystalline solids yield.
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Eco-friendly systems designed to recycle waste process vapors and flue gas thermal energy, significantly dropping steam consumption.
Learn More →Forced Circulation Evaporators (FCE) represent the pinnacle of thermal separation engineering, specifically designed for handling highly viscous, fouling-prone, or crystallizing solutions. Unlike falling film systems where gravity drives film flow, forced circulation relies on high-flow axial or centrifugal pumps to maintain a high-velocity liquor flow within the heat exchanger tubes, typically in the range of 2.0 to 4.5 meters per second.
This high-velocity flow yields two distinct engineering advantages: first, it increases the convective heat transfer coefficient (U-value) within the tubes; second, it generates sufficient shear stress at the inner tube wall to minimize boundary layer stagnation, thereby preventing the scaling of materials.
An essential feature of a robust forced circulation system is the suppression of boiling within the heat exchanger tubes. By applying a static head (hydrostatic pressure) or utilizing a throttling valve, the liquid is kept in a liquid state while absorbing sensible heat from the steam side. Boiling is only allowed to occur as the superheated liquid enters the lower pressure zone of the flash chamber.
For global industrial buyers, regulatory compliance is non-negotiable. To market pressure systems inside the European Economic Area (EEA), compliance with the Pressure Equipment Directive (PED) 2014/68/EU is mandatory. This directive applies to the design, manufacture, and conformity assessment of pressure equipment with a maximum allowable pressure greater than 0.5 bar.
CE certification guarantees that our evaporators are modeled to strict harmonized standards such as EN 13445 (for unfired pressure vessels) or the AD 2000 code. The design verification processes involve:
Providing specialized machinery for drying, mechanical separation, and concentration since 1992.
Zonghong provides energy-efficient, high-performance evaporation solutions configured for industrial wastewater, zero-liquid-discharge (ZLD), and agricultural separation.
A falling film evaporator efficiently concentrates heat-sensitive liquids. The liquid forms a thin film flowing down vertical tubes, maximizing heat transfer efficiency.
Zongheng is a premier Chinese manufacturer specializing in forced circulation evaporators engineered to handle crystallization and high scaling liquids.
Mechanical Vapor Recompression (MVR) plants offer significant operational steam savings by recycling the vapor latent heat via a mechanical compressor.
This design integrates multiple waste heat sources—including drying vapors, boiler flue gas, and secondary steam to minimize utility steam requirements.
Jiangsu Zongheng's single screw press efficiently dewaters solid-containing materials, agricultural residues, and fibrous industrial waste for mechanical moisture removal.
Jiangsu Zongheng's ZXG Tube Bundle Dryers ensure safe, low-oxygen drying via contact heating, ideal for heavy organic solids like starch fibers and germ.
Jiangsu Zongheng's MQG Airflow Dryer employs high-speed hot air to suspend and dry particulate materials instantaneously during pneumatic transport.
Zongheng's degerming mills ensure precision germ removal and separation, preserving kernel structures for corn wet milling processes.
Jiangsu Zongheng's YDX Starch Washing Cyclone is specifically engineered for the multi-stage counter-current purification and concentration of starch suspensions.
Detailed performance parameters of our flagship thermal systems.
Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd (formerly Yixing Yangxi Light Industry Machinery Factory), founded in 1992, is located in Zhoutie Town, Yixing City, on the shores of the beautiful Taihu Lake. The company covers an area of over 54,000 square meters, with a production workshop area of over 22,000 square meters.
Jiangsu Zongheng is a modern high-tech enterprise specializing in the manufacturing of concentration, drying, starch industry, alcohol DDGS, and Category III medium & low-pressure vessel equipment. It is currently a member enterprise of the China Starch and Alcohol Association. Its products are widely used in industries such as food fermentation, alcohol, chemical, pharmaceutical, environmental protection, and petrochemical.
Welcome to our company, we are a group of creative people driving industrial innovations since 1992.
Established as Yixing Yangxi Light Industrial Machinery Factory, covering 15 mu with 45 employees.
Obtained ISO9001 quality management system certification.
Recognized as a Jiangsu Provincial High-Tech Enterprise.
Obtained Special Equipment Manufacturing License of the PRC (License No. TS2232C42).
Acquired ASME "U" Stamp authorization, stepping into high-end international markets.
Obtained International Quality System Certification (No. 45021) for full safety standards.
Covers 54,000+ sqm, 120 employees, 20+ engineers, and 3 senior engineers.
The production of industrial-scale Forced Circulation Evaporators requires massive infrastructural support, raw material availability, and metallurgical capability. Jiangsu Zongheng leverages Yixing's advanced industrial metallurgy cluster. We source raw materials—including specialized alloys such as Ti Grade 2, Hastelloy C-276, and Super Duplex Stainless Steel (SAF 2205/2507)—from world-class, certified local mills.
By consolidating processing stages in our 22,000 square meter production facility, we cut out intermediate transport costs and shorten lead times. Our tooling capabilities include automated plate rolling machines, automatic tube-to-tubesheet orbital welding units, and advanced heat treatment ovens. This high degree of factory integration allows us to supply CE and ASME compliant pressure equipment at a optimized cost-to-performance ratio compared to Western OEMs.
In addition to high-efficiency fabrication, our local engineering ecosystem ensures rapid configuration. Our structural engineers utilize PV Elite and ANSYS software to coordinate custom structural loads, wind-loading coefficients, and seismic designs for project sites in Europe, South America, and Southeast Asia.
Our concentration and drying systems are built for optimal performance across multiple sectors.
Certified engineering compliance including ASME U-Stamp, CE PED, and ISO 9001 quality systems.
When purchasing complex industrial systems from overseas, global procurement teams evaluate more than just upfront CAPEX. Key criteria include: long-term operational costs (OPEX), reliability under continuous loading, and post-sales technical support. Jiangsu Zongheng addresses these issues by offering complete installation supervision, hot commissioning services, and localized support through our international engineering network.
Our project teams coordinate directly with local engineering entities to ensure seamless integration on site. From initial civil foundation load verification to integrating local electrical panel standards (such as IEC, UL, or CSA), we adapt our designs to match local codes. Spare parts like mechanical seals for circulation pumps, instrumentation, and control system components are sourced from globally recognized suppliers to guarantee local availability.
The industrial concentration market is transitioning toward absolute energy efficiency. Single-effect and multi-effect steam evaporators are being replaced by MVR (Mechanical Vapor Recompression) forced circulation units. By compressing the clean secondary vapor generated during the evaporation process, we elevate its thermal state and feed it back to the heater shell. This reduces fresh steam consumption by up to 90%, transforming what was historically a highly energy-intensive process into a sustainable, closed-loop thermal cycle.
Additionally, integration with PLC/SCADA control systems enables smart operation. By continuously tracking variables such as pressure drops across the heat exchanger, density changes in the flash chamber, and circulation pump motor current, the system can predict scaling rates and trigger optimized Clean-in-Place (CIP) sequences automatically.
Detailed engineering explanations answering technical queries regarding design, compliance, and operation.
Forced Circulation Evaporators are designed for liquids containing solids, high viscosity, or those prone to crystallization. While falling film evaporators offer high heat transfer rates for clean, low-viscosity fluids, they suffer from film breakdown and rapid scaling when solids begin to precipitate. The high velocities in forced circulation maintain solids in suspension and prevent scaling on heat transfer surfaces.
Under the Pressure Equipment Directive (PED) 2014/68/EU, evaporators operating above 0.5 bar must undergo strict compliance procedures. This dictates certified material traceabilities, welder certifications, safety valves, and independent audits by a Notified Body. It guarantees the structural safety of the equipment under all operating conditions.
Obtained in 2012, our ASME U-Stamp indicates that our factory is certified to design and fabricate pressure vessels in compliance with the ASME Boiler & Pressure Vessel Code (BPVC) Section VIII. This is recognized by safety regulators in over 100 countries, simplifying local permitting processes.
Yes. We select materials based on the chemical profile of the feed liquid. For acidic, high-chloride, or aggressive process streams, we fabricate contact parts using premium alloys such as Titanium Gr. 2, Hastelloy, Duplex 2205, or Super Duplex 2507 stainless steel.
Mechanical Vapor Recompression compresses the secondary vapor from the separator and recycles it as the heating medium. This eliminates the need for a continuous fresh steam supply, requiring only electrical energy to run the mechanical compressor, which can result in up to 90% energy savings.
We provide remote engineering coordination, detailed structural designs for local permitting, complete installation supervision, control system integration, and on-site commissioning support.
Complete your production lines with our CE-certified evaporator systems, dewatering presses, and heavy-duty dryers.
Energy-optimizing MVR systems meeting EU safety standards, ideal for processing organic solutions in starch and bio-refinery plants.
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Reclaims low-grade heat sources to process high-salinity wastewater, reducing operational costs and supporting environmental compliance.
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Specially designed film distribution heads guarantee uniform tube wetting, high evaporation rates, and gentle product handling.
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Durable, heavy-duty evaporator plants engineered to withstand harsh chemical environments while minimizing energy consumption.
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High-performance physical dewatering system certified to European machinery standards for reliable operation under high loads.
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Engineered for temperature-sensitive processing, safeguarding product quality and active compounds from thermal degradation.
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High-speed pneumatic drying systems designed for agricultural starches, organic fibers, and light chemical powders.
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Our flagship CE-certified concentration plant, designed for crystallizing solutions and demanding industrial evaporation processes.
Learn More →Stay informed about technical shifts and thermodynamic engineering principles.
Jun 18, 2026
The evaporator absorbs heat to vaporize media, while the condenser releases heat to liquefy vapor; the two perform opposite cooling and heating functions. Operating under low pressure, the evaporator generates cold energy and concentrates target solutions. Understanding the thermodynamic cycles between vaporization energy changes and condenser heat loads is critical to achieving stable concentration profiles.
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