Explore our state-of-the-art steam-heated evaporators, industrial falling film plants, and mechanical vapor recompression systems designed for high thermal efficiency.
Industrial concentration demands robust thermal designs capable of handling varying liquid viscosity, crystallization risks, and strict energy budgets. As a premier Chinese manufacturer, Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd. (formerly Yixing Yangxi Light Industry Machinery Factory) has pioneered evaporation technology since 1992.
Steam-heated evaporators utilize latent heat transfer from vaporized water to separate volatile solvents from non-volatile solutes. Through advanced configuration (such as falling film, forced circulation, or mechanical vapor recompression), we target the optimal balance of liquid residence time, thermal footprint, and CAPEX/OPEX constraints.
Why global processing plants source heavy chemical and industrial equipment from our dedicated manufacturing base in Jiangsu, China.
Situated in Zhoutie Town, Yixing City on the shores of Taihu Lake, our facility spans 54,000+ m² with a dedicated 22,000+ m² production workshop. We house advanced rolling mills, robotic tube welding, and Non-Destructive Testing (NDT) labs to ensure precision fabrication.
Holding the ASME "U" Stamp authorization since 2012, alongside the Special Equipment Manufacturing License of the PRC (TS2232C42) and ISO9001 certifications, Zongheng complies with demanding international codes for low and medium-pressure vessels (Category III).
Unlike simple component suppliers, we deliver complete thermal packages. Our engineers design, simulate, construct, and automate complete lines—integrating flash drying, tube dryers, and screw separators for streamlined, worry-free execution.
A deep breakdown of the mechanics driving our evaporator designs to help process engineers choose the correct configuration.
Designed specifically for heat-sensitive liquids with low viscosity. The process liquid enters the top distribution head, forming a uniform, thin film that flows downward by gravity inside vertical tubes. Heating steam on the shell side boils off volatile fractions. The continuous vapor movement pushes the film, yielding exceptional heat transfer coefficients and remarkably short residence times to prevent thermal degradation.
For viscous, crystallizing, or highly fouling materials. Instead of depending on gravity film flow, a high-capacity axial flow pump drives the liquid through the tube heat exchanger under pressure. Boiling is suppressed inside the tubes by maintaining hydrostatic head. Flash evaporation occurs only when entering the separator tank, shifting the crystallization process away from the heat exchange surfaces.
We engineer unified production blocks that synchronize evaporation, solid separation, and drying to maximize plant productivity.
In large-scale manufacturing facilities such as corn wet milling, fuel ethanol, and chemical synthesis plants, waste streams represent both an environmental burden and an untapped resource. Our systems work in synergy. For instance, in Corn Steep Liquor (CSL) processing, the waste steepwater is concentrated via a multi-effect steam heated falling film evaporator to raise solids content from 5% to 50%+. This concentrated syrup is then mixed with wet corn fiber from our Single Screw Press and fed into a ZXG Tube Bundle Dryer or MQG Airflow Dryer, creating high-value animal feed (DDGS) while recovering process water.
By combining high-efficiency mechanical washing using our YDX Starch Washing Cyclones with thermal concentration and drying, we enable plants to minimize wastewater discharge, capture valuable organics, and significantly lower their carbon footprint.
Decades of progress driving thermal processing innovations across the globe.
Operating from a 54,000 m² factory employing senior engineers and 120 skilled technicians, Zongheng represents the absolute forefront of industrial concentration technology.
Obtained the International Quality System Certification (Certificate No: 45021), verifying our end-to-end production traceabilities.
Qualified to fabricate stamp-authorized pressure vessels according to American Boiler and Pressure Vessel codes, clearing the way for European and North American installations.
Established in 1992 as Yixing Yangxi Light Industry Machinery Factory with 45 employees, initiating our commitment to custom thermal machinery.
Tested and validated to perform under strict regulatory frameworks worldwide.
Expert technical insights regarding design parameters, operation, and efficiency optimization of steam evaporators.
Mechanical Vapor Recompression (MVR) systems compress the secondary vapor generated from the product using an electric fan or centrifugal compressor, raising its pressure and temperature. The compressed vapor is then returned to the heating side of the same evaporator to act as the primary heating medium. This eliminates the need for massive volumes of fresh steam. While MVR systems have higher electrical power consumption, they slash thermal energy (boiler steam) requirements by up to 90%, representing an incredibly fast ROI in locations with high steam generation costs.
Depending on the chloride levels, acidity, and operating temperatures, we construct our heat exchangers and vapor separators from dynamic alloys. Standard processes use AISI 304 and 316L stainless steel. For severe industrial environments such as high chloride wastewater concentration, we utilize Duplex Stainless Steel (e.g., SAF 2205 / 2507) or Titanium Grade 2 to completely mitigate pitting corrosion and stress-corrosion cracking.
Proper distribution is critical. If a tube surface dries out because the feed rate is too low or unevenly distributed, the product will burn onto the tube wall, resulting in fouling and heat transfer loss. We design customized distribution plates (often incorporating concentric overflow rings or spray nozzles) using computer simulations to guarantee that the tube inner surface is 100% wetted at all design feed velocities.
Yes. Our waste heat evaporators are designed precisely to integrate multiple secondary heat sources. For instance, exhaust vapors from steam tube bundle dryers or flash air dryers can be directed into the first effect of an evaporator. This integration drastically reduces fresh boiler steam consumption, converting process waste back into active thermal energy.
Explore our complete range of high-efficiency dewatering presses, indirect steam tube bundle dryers, and starch cyclonic washing machines.
Latest updates on thermal dynamics, evaporation techniques, and auxiliary equipment.
In typical concentration layouts, the evaporator acts as the heat absorbing unit, converting liquid water within the solution into vapor state under sub-atmospheric pressure. Conversely, the condenser acts as the thermal sink, cooling the clean secondary vapor back to liquid distillate. Proper matching of these two components determines the maximum achievable vacuum level and, consequently, the evaporation temperature. Maintaining a low boiling temperature is highly critical for preserving sensitive organic components, prevent color degradation in foods, and avoid thermal scaling of complex organic matrices.
Our designs match high-efficiency plate or shell-and-tube surface condensers with water ring vacuum pumps or multi-stage steam ejectors, ensuring high reliability, low power consumption, and minimal water requirements.
We warmly welcome friends from various industries, both domestic and international, to visit us for cooperation and mutual development!
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