Industrial-scale evaporation plants engineered for high viscosity liquids, heavy crystallization control, and stable operations.
Specifically developed for raw starch slurry washing, refining, protein removal, and high-purity separation processes.
CE compliant forced circulation plants tailored to European directives, ensuring safe pressure containment and reliable process safety.
Mechanical Vapor Recompression technologies maximizing heat recycle limits and eliminating standard steam consumption.
Superb thermal control utilizing low-pressure heating steam inside the rotating tube core bundle for minimal oxidation.
Engineered MVR systems targeting organic wastewater, salt recovery crystallization, and industrial solvent drying setups.
Integrates low-grade flash vapours from distillers and dryers to concentrate liquors without additional live steam.
Optimized for Zero Liquid Discharge (ZLD) plants in chemical, pharmaceutical, and high-salinity process plants.
Tube Bundle Dryers represent the pinnacle of indirect steam contact drying technology for high-volume solid materials. Designed specifically for industries processing free-flowing, powdery, or particulate materials, these machines operate on the principles of conduction heat transfer. Unlike direct-fired rotary dryers, which expose process materials to combustion gases, the ZXG Tube Bundle Dryer heats materials through indirect contact with steam-filled tubes. This mechanism maintains low oxygen levels, mitigates dust-explosion hazards, and prevents oxidation degradation of sensitive agricultural starches, chemical intermediates, or brewery spent grains.
The heat transfer in a tube bundle dryer is governed by Fourier's Law of Heat Conduction. High-pressure steam enters the rotating tube bundle through a centralized rotary manifold, filling the interior tubes. As the bundle slowly rotates inside the stationary outer casing, dynamic shovels (paddles) welded to the tube exterior lift, disperse, and direct the material longitudinally down the slope of the dryer shell. Heat from the steam condenses on the inner tube surfaces, transferring latent heat through the tube wall to the surrounding material layer.
When selecting a process dryer for large-scale operations, engineers must evaluate thermal efficiency, product degradation risk, emission profiles, and footprint requirements. Below is a comparative overview highlighting why indirect tube bundle drying is preferred for complex industrial drying applications:
| Parameter | ZXG Tube Bundle Dryer | Direct Rotary Drum Dryer | Fluidized Bed Dryer |
|---|---|---|---|
| Heat Transfer Method | Indirect (Conduction through tube walls) | Direct (Convective contact with flue gas) | Direct (Convective contact with hot air) |
| Primary Energy Source | Saturated Steam (0.2 - 0.6 MPa) | Natural Gas, Oil, or Coal Flue Gas | Steam Coils or Direct Air Heaters |
| Oxygen Concentration | Extremely Low (Low-Oxygen Inertization) | High (Supports combustion/oxidation) | High (Ambient air fluidization) |
| Specific Steam Consumption | 1.2 - 1.3 kg steam / kg H₂O evaporated | N/A (Relies on gas combustion) | 1.5 - 1.8 kg steam equivalent / kg H₂O |
| Dust Emission Control | Minimal exhaust gas volume; simple cyclone setup | Massive exhaust volume; requires ESP/baghouses | High air volume; critical baghouse filtration |
| Product Retention Control | Adjustable shovel angles & dam plates | Dependent strictly on drum slope & speed | Fluidized bed height & weir gate control |
Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd is situated in Zhoutie Town, Yixing City—the heart of China's heavy machinery and industrial pressure vessel manufacturing hub. Over 30 years of localized engineering growth has allowed the region to consolidate its metalworking, precision forging, and pressure weld inspection supply chains. This geographical proximity translates directly to raw material cost reduction, superior logistics for massive components, and immediate access to certified third-party inspection firms.
Operating a 54,000 square meter facility with over 22,000 square meters of dedicated ASME-certified clean fabrication workshops, Jiangsu Zongheng manages the entire value chain in-house. From raw plate CNC cutting, heavy roll forming, dynamic tube-sheet welding, to comprehensive post-weld stress relief and dynamic balancing, our operations guarantee structural reliability. Eliminating outsourced fabricators enables us to enforce strict Quality Assurance protocols, resulting in longer machinery lifetimes, minimized structural vibration, and zero leakage at high operating steam pressures.
Foundation: Established as Yixing Yangxi Light Industry Machinery Factory, focusing on regional machinery servicing with 45 employees across a 15-mu site.
Quality Assurance: Accomplished ISO9001 registration, formalizing strict manufacturing controls and trace documentation protocols.
Innovation Push: Recognized as a High-Tech Enterprise of Jiangsu Province, establishing standard R&D testing bays for industrial dryers.
Special License: Secured the Special Equipment Manufacturing License of the People's Republic of China (License No.: TS2232C42) for boilers and pressure vessels.
ASME Certification: Awarded the ASME "U" Stamp Authorization, validating weld quality and opening global delivery to high-specification industries.
Global Compliance: Secured International Quality System Certification (No. 45021) aligning factory practices with stringent European and American supply requirements.
Modernized Footprint: Covering a total area of over 54,000 square meters with production workshop space exceeding 22,000 square meters. The engineering department hosts 3 senior engineers and 20+ associate engineers directing a comprehensive team of 120 specialists.
Jiangsu Zongheng's MQG Airflow Dryer employs high-speed hot air to suspend and fluidize the material. By utilizing impulse airflow generated from precisely varied tube diameters, it continuously tumbles the particles while conveying them. This design ensures rapid, uniform, and efficient drying throughout the entire transportation process within the system, making it ideal for processing heat-sensitive materials that require short drying times.
A falling film evaporator efficiently concentrates heat-sensitive liquids. The feed liquid forms a thin film flowing down heated vertical tubes, where it partially evaporates. Vapor generated flows parallel to the liquid, enhancing the process. It ensures a short residence time and low operating temperature, preserving product quality. The system requires proper liquid distribution and complete surface wetting to prevent fouling and maintain high thermal efficiency and operational stability.
For multinational corporations, procurement of capital process equipment hinges on local compliance, certification authenticity, and long-term operating support. Jiangsu Zongheng eliminates entry barriers by maintaining active design and manufacturing credentials across regional regulatory jurisdictions.
Our ASME VIII Div 1 ("U" Stamp) certification ensures that pressure calculations, material trace records, welding procedures, and radiographic inspections satisfy Western standards. In tandem, CE certification according to the Pressure Equipment Directive (PED 2014/68/EU) guarantees that systems targeting the European Economic Area possess correct safety relief valves, redundancy systems, and material compliance certificates.
Our local support starts at the design phase. By coordinating directly with site engineering contractors, we customize mechanical drawings to match regional layout constraints, local building seismic codes, and localized piping standard alignments. Post-delivery, our commissioning teams fly on-site to handle dynamic load alignment, balancing audits, utility connections, and control integration (DCS/PLC config).
Concentration of industrial fermentation streams, steep liquor, and high-load wastewater in corn processing plants.
Continuous mechanical dewatering of slurry containing fibers, germ, and pulp preceding thermal drying steps.
High-velocity dispersion systems for particulate starches, flours, and quick-drying chemical compounds.
Indirect heat transfer for corn starch fiber drying, recovering vital feed components under stable temperature controls.
Distillers Dried Grains with Solubles (DDGS) drying, optimizing steam balance via integrated plant piping networks.
Removal and safe recovery of solvents, hydrocarbons, and chemicals from polymers and raw crystals.
Drying fine minerals and tailing elements under low shear and controlled continuous throughput rates.
Dewatering municipal and biological factory waste sludges down to low-moisture solids fit for eco-incinerators.
Our ZXG Series features high-efficiency thermal design, typically requiring 1.2 to 1.3 kg of saturated steam to evaporate 1.0 kg of moisture from the feed material. This high thermal efficiency is achieved through conduction heat transfer and minimized exhaust air volume compared to standard convection dryers.
Yes, all pressure vessels and steam distribution elements constructed by Jiangsu Zongheng can be fabricated under ASME "U" Stamp authorization or the European PED (CE marking) framework. Materials are certified, and critical welds undergo radiography inspection to ensure code compliance.
We modify the internal shovel arrangements and implement customized material recirculation loops. Sticking feed is mixed with pre-dried output material to achieve a non-tacky composite moisture content below the critical sticking phase before entering the main drying chamber, preventing fouling.
The rotating joint seals and condenser siphons must be checked every 6 months. Our designs utilize high-grade PTFE and silicon carbide seals to reduce seal wear, and condensate levels inside the tubes are monitored continuously to prevent heat transfer loss from waterlogging.
Yes. The hot, humid exhaust vapours from the tube bundle dryer can be routed to supply heat energy to falling film or waste heat evaporators, providing significant energy integration and operational cost savings across the process plant.
Get in touch with our design engineers for customized machinery sizing, technical specifications, and system integration support. We welcome global partners to explore mutual industrial growth.
Precision separation machinery isolating corn germ from starch endosperm with high efficiency and minimal kernel breakage.
Engineered to handle severe fouling liquids, ensuring continuous operations with extended cleaning cycles.
Specially optimized design that utilizes waste vapor to concentrate steep liquors prior to the spray drying process.
Maintains inert process conditions inside the casing to prevent dust explosion risks and retain product nutrients.
Custom engineered systems for chemical salt separations, processing plant wastewater purification, and solvent recovery.
Multistage hydrocyclone clusters built for protein washouts and starch enrichment down to low impurities.
Heavy-duty stainless steel cyclones constructed to resist wear and maintain separation precision under pressure.
Turnkey evaporation layouts configured with high thermal economy, thermal recompression, and low maintenance footprints.
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