Global environmental regulations demand stringent effluent limits, driving factories to adopt Zero Liquid Discharge frameworks. Thermal evaporation systems serve as the core of modern ZLD systems, transforming highly concentrated wastewater into high-purity distillate for complete reuse. Transitioning to integrated Forced Circulation and Falling Film evaporators enables chemical processors, distilleries, and food plants to eliminate liquid discharges entirely while recovering critical solid products.
Traditional multi-effect evaporation configurations consume massive amounts of fresh steam. The modern industry has shifted heavily toward Mechanical Vapor Recompression (MVR) technology, which utilizes electric-driven compressors to recycle latent heat from secondary vapors. This thermodynamic cycle reduces steam demand close to zero and slashes carbon footprints by up to 80%, providing a high ROI in power-rich industrial zones.
Safety is a priority when handling hazardous, corrosive, or high-pressure effluents. CE certification according to the Pressure Equipment Directive (PED 2014/68/EU) guarantees that evaporators, heat exchangers, and separators are designed, manufactured, and inspected with the highest European safety standards. Integrating ASME U-Stamp capabilities and ISO9001 quality workflows validates manufacturing practices for global deployments.
In modern industrial processes, effluent treatment is no longer just a regulatory obligation; it is a vital aspect of operational efficiency and resource conservation. Modern effluent evaporators operate by applying thermal separation principles to split clean distillate from concentrated waste products. As a premier Chinese manufacturer with over 30 years of engineering pedigree, Jiangsu Zongheng designs state-of-the-art evaporation equipment. By leveraging advanced heat transfer calculations, computational fluid dynamics (CFD) modeling, and specialized anti-corrosion metallurgy (such as duplex stainless steels and titanium alloys), we engineer high-performance systems capable of operating reliably in harsh chemical environments.
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.
Specifically engineered to handle highly concentrated, highly viscous liquids containing suspended solids, crystals, or severe scaling agents. The liquid is pumped through the heat exchanger tubes at high velocities, preventing boiling inside the tubes to control fouling. Evaporation occurs only when the superheated liquid enters the flash separator vessel under reduced pressure. This mechanical design maintains stable operations when handling salt-laden wastewater, chemical residues, and waste streams from fermentation industries.
Industrial effluents differ greatly depending on the source industry. For instance, food and beverage processing wastewater often contains high organic loads (BOD/COD) and heat-sensitive sugars, necessitating low-temperature, short-contact-time thermal treatment using falling film plants. Conversely, chemical and pharmaceutical effluents contain high concentrations of inorganic salts (such as sodium chloride, sodium sulfate, and ammonium sulfate) that crystallize upon concentration, requiring high-velocity forced circulation systems.
Additionally, processing starch or fuel alcohol produces high-volume, low-value slurs. Integrating wastewater heat recovery evaporators with downstream solid dewatering systems (like single screw presses) and industrial airflow dryers or tube bundle dryers creates a closed-loop system. We design and deliver complete process systems that recover dry product solids (such as animal feed DDGS or corn gluten meal) while recycling high-purity water back to the front-end plant.
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.
With an emphasis on compliance and quality, the factory holds the ASME "U" Stamp, Special Equipment Manufacturing License of China, ISO9001 international quality management certification, and manufactures evaporators strictly conforming to EU CE standards for global markets.
Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd, formerly known as Yixing Yangxi Light Industrial Machinery Factory, was established. It started with a total area of approximately 15 mu and had a team of 45 dedicated employees.
The company took the lead in obtaining ISO9001 certification, laying the groundwork for standardized quality control protocols.
Officially recognized as a High-Tech Enterprise by Jiangsu Province, accelerating our investments in R&D and proprietary thermal process patents.
The company obtained the Special Equipment Manufacturing License of the People's Republic of China (License No.: TS2232C42), enabling the production of pressure vessel designs.
Acquired the prestigious ASME "U" Stamp authorization, marking a key milestone in our capability to manufacture export-grade pressure vessels matching global codes.
Obtained international quality system certification (Certificate No.: 45021), establishing a complete quality assurance system aligned with international standards.
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.
Quality assurance is integral to our factory. Jiangsu Zongheng ensures that all effluent evaporation equipment conforms to the European Union's Pressure Equipment Directive (PED). By undergoing strict CE audits, our factory guarantees that from material sourcing (such as EN 10204 3.1 certification for plates and tubes) to manufacturing (including non-destructive examination, ultrasonic testing, and hydrostatic pressure verification), every step is fully documented and traceable.
The global industrial wastewater treatment sector is undergoing a rapid transition. Regulatory authorities across the EU, North America, and parts of Asia are imposing strict limits on parameters such as Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), and Total Dissolved Solids (TDS). Rather than relying on simple biological processes, chemical, pharmaceutical, and agricultural manufacturing facilities must implement evaporation and crystallization to separate water from salt matrices. Additionally, energy-efficient solutions like MVR, multi-effect evaporation utilizing waste heat, and solar thermal integration are helping industrial operators lower operational expenses (OPEX) in the face of volatile global energy prices.
When purchasing large-scale industrial effluent treatment plants, engineering teams should evaluate manufacturers based on several key operational factors:
Managing large international engineering, procurement, and construction (EPC) projects requires reliable technical support. Jiangsu Zongheng offers complete field service packages. Our engineering team assists from initial water chemistry testing and pilot plant trials to final commissioning and operator training. Our global partner network and digital control diagnostics ensure rapid remote support and spare parts availability, minimizing downtime.
We focus our ongoing research and development on three main areas: smart automation, advanced coatings, and hybrid energy systems. By integrating IoT sensors and AI-driven automation systems, our evaporators automatically adjust flow rates and heat inputs to match shifting effluent profiles, preventing fouling. Our research into non-stick surfaces and nano-ceramic coatings aims to extend cleaning intervals. Lastly, we are designing hybrid energy systems that allow plants to switch between steam and electric power based on energy costs, ensuring cost-efficient operations.
We warmly welcome partners from all industries, both domestic and international, to cooperate with us for mutual growth and sustainable development. Contact our engineering team for customized sizing and technical calculations.
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