Established in 1992 (originally Yixing Yangxi Light Industry Machinery Factory), Jiangsu Zongheng is situated in the scenic Zhoutie Town, Yixing City, along the shores of Taihu Lake. As a modern, high-tech enterprise, we are dedicated to designing and manufacturing top-tier industrial evaporators, vacuum dryers, starch processing machinery, alcohol DDGS systems, and Category III medium & low-pressure vessels.
Our expansive manufacturing footprint spans over 54,000 square meters, with modern production workshops occupying more than 22,000 square meters. As an active member of the China Starch and Alcohol Association, we serve critical global industries, including food fermentation, pharmaceuticals, environmental engineering, oil & gas, and advanced fine chemicals.
Years of Industrial Innovation
Senior & Design Engineers
Total Factory Area (m²)
Modern Workshop Area (m²)
Industrial wastewater management has transitioned from traditional containment to strict Zero Liquid Discharge (ZLD) mandates. Choosing the right thermal evaporation technology is vital to balancing capital expenditure (CAPEX) with operational costs (OPEX). Below, we analyze our fundamental technological pathways, helping plant engineers optimize recovery and streamline resources.
Mechanical Vapor Recompression (MVR) utilizes a centrifugal compressor or steam blower to compress secondary vapor, increasing its temperature and pressure. This recycled steam acts as the primary heating medium, eliminating the need for continuous raw steam.
The feed liquor forms a thin film flowing down heated vertical tubes. Co-current vapor flow accelerates the liquid velocity, enhancing heat transfer and maintaining short product contact times.
An internal circulation pump moves the liquid through the heat exchanger tubes at high velocity. Evaporation is suppressed until the liquor enters the flash separator vessel.
Thermal efficiency in wastewater treatment is entering a new phase. By pairing Mechanical Vapor Recompression (MVR) with multi-effect falling film pre-concentrators, plants can optimize specific energy consumption. Modern systems integrate multi-stage compressors and automated variable-frequency controls to adjust to fluctuating feed compositions. This ensures stable operation even during variations in chemical oxygen demand (COD) and salinity.
We are incorporating smart control algorithms and predictive modeling into our system designs. This setup allows plants to continuously monitor heat transfer coefficients and dynamically schedule descaling runs. The result is minimized unplanned downtime and reduced chemical consumption during wash cycles.
High-salinity industrial wastewater can quickly degrade standard stainless steels. To resist stress corrosion cracking, pitting, and crevice corrosion, we use advanced alloys tailored to the application.
Depending on chloride levels and pH, our structural materials range from 316L and Duplex 2205 to Super Duplex 2507, Hastelloy C276, and Titanium Grade 2. Our welding protocols are designed to protect these materials, ensuring durability and reliability in aggressive chemical environments.
Our ZLD systems combine falling film pre-concentration, forced circulation crystallization, and solid dewatering to recover clean water and isolate dry salts. This setup helps facilities meet strict environmental requirements while reclaiming process water.
Our evaporators efficiently concentrate corn steep liquor (CSL), while our airflow and tube bundle dryers process germ, fiber, and gluten. This comprehensive equipment line optimizes starch processing from milling to byproduct recovery.
Designed for high-viscosity thin stillage, our multi-effect falling film and waste heat evaporators integrate with tube bundle dryers. This integration lowers steam usage and ensures reliable production of high-grade Distillers Dried Grains with Solubles (DDGS).
Operating from our 54,000 m² advanced manufacturing base in Yixing, Jiangsu, we leverage China's industrial supply chain to produce reliable, high-performance systems. Our facility features automated plasma cutting systems, heavy-duty rolling machines, and clean welding bays designed for dual-phase stainless steel and titanium alloys.
By consolidating engineering, raw material sourcing, machining, vessel assembly, and quality testing in one location, we compress delivery times by 20% to 35% compared to conventional fabricators. This integrated setup protects projects from global supply chain volatility and ensures strict quality control at every stage.
Each evaporator tube sheet, separator chamber, and structural frame is built to international standards, ensuring simple installation, rapid startup, and stable long-term performance.
Today, the company covers a total area of over 54,000 square meters, with production workshop space exceeding 22,000 square meters. It currently employs 3 senior engineers and over 20 engineers and assistant engineers, with a total staff of 120 people.
International quality system certification (Certificate No.: 45021), establishing a complete quality assurance system aligned with international standards.
Acquired the ASME "U" Stamp authorization, marking the company's entry into a new phase of international development.
The company obtained the Special Equipment Manufacturing License of the People's Republic of China (License No.: TS2232C42) for pressure vessel fabrication.
Officially recognized as a Jiangsu Provincial High-Tech Enterprise, highlighting our commitment to thermal process innovation.
The company took the lead in obtaining ISO9001 certification, standardizing our quality management workflows.
Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd, formerly known as Yixing Yangxi Light Industrial Machinery Factory, was established with 45 employees.
When procuring industrial evaporation plants, evaluating long-term performance metrics helps balance upfront capital cost with operating expenses. Below is our engineering evaluation matrix for global procurement teams.
Verify site utility availability. If low-cost steam is available, a multi-effect configuration with Thermal Vapor Recompression (TVR) may be ideal. When electricity is preferred and steam is limited, MVR systems offer the best thermodynamic efficiency.
Chemical analysis of feed stream chlorides, fluorides, organic acids, and extreme pH ranges dictates material choice. Selecting suitable metallurgy prevents corrosion and extends equipment life.
Modern evaporators require automated Clean-In-Place (CIP) systems. Regular wash cycles maintain high heat transfer coefficients and prevent permanent scaling on heat exchanger tubes.
Industrial installations must comply with strict regional safety and manufacturing standards. Over decades of operation, Jiangsu Zongheng has built a comprehensive compliance portfolio to simplify project approvals:
Our compliance portfolio ensures that every evaporator system meets local safety and environmental requirements, regardless of installation location.
Looking to design an evaporation system or optimize an existing installation? Our engineering team is here to help with sizing, thermal balances, and material selection.
We welcome customers to visit our 54,000 square meter facility in Yixing, Jiangsu, China, to review our manufacturing processes, welding quality, and raw material stores.
Zongheng
