In the modern corn wet milling and industrial starch processing industries, efficient solid-liquid separation represents the critical frontier in reducing energy expenditure and maximizing product recovery. A Corn Fiber Screw Press Machine acts as the fundamental workhorse in this processing matrix, converting high-moisture wet fiber slurries into stackable, dewatered press cakes ideal for subsequent thermal drying or direct integration into animal feed formulations (such as DDGS - Distiller's Dried Grains with Solubles).
Historically, raw corn fiber discharged from starch washing cyclones possesses a moisture content of roughly 75% to 85%. Attempting to dry this wet mash directly in tube bundle dryers or airflow flash dryers leads to prohibitive operational costs, high greenhouse gas emissions, and mechanical fouling inside the dryer pipes. By introducing a mechanical dewatering step using an engineered single screw press, industrial plants can reliably squeeze out free moisture, bringing the inlet moisture down to 55% - 60%. Removing water mechanically is over ten times more energy-efficient than thermal evaporation.
As a leading Chinese supplier and manufacturing factory, Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd. designs custom screw presses that process high volumes of fiber slurry, delivering optimal cake dryness and minimal loss of fine starch particles through the screen openings.
The heart of the Jiangsu Zongheng Single Screw Press lies in its tapered helical geometry and customized screen baskets. Unlike standard agricultural juice presses, industrial corn fiber contains highly abrasive starch granules, gluten proteins, and sulfur dioxide residue from the corn steeping process.
As regulatory frameworks around industrial carbon footprints tighten, starch and glucose processing plants face immense pressure to decarbonize. Industrial evaporators and bundle dryers are energy-intensive. Modern factories recognize that optimizing the mechanical dewatering step represents the single lowest-hanging fruit to achieve corporate carbon reduction goals.
For instance, a starch refinery processing 2,000 tons of corn per day produces approximately 300 wet tons of fiber. Upgrading a legacy press system to a modern Jiangsu Zongheng High-Performance Single Screw Press can improve the cake dryness by 3% to 5%. This difference in moisture translates directly to a reduction of several metric tons of steam consumption per hour in the drying circuit.
By working with Jiangsu Zongheng, global buyers benefit from cost-effective manufacturing and advanced heavy-industry engineering. Our systems are running in starch mills across East Asia, South America, Eastern Europe, and the Middle East, satisfying ASME standards and CE safety certifications.
Originally founded in 1992 as the Yixing Yangxi Light Industry Machinery Factory, Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd. has grown over three decades to become an industry-leading modern high-tech enterprise. Located in Zhoutie Town, Yixing City on the shores of Taihu Lake, our specialized heavy fabrication capabilities serve the food fermentation, starch, alcohol DDGS, chemical, pharmaceutical, and environmental protection sectors.
As an active member of the China Starch and Alcohol Association, we hold key national and international certifications including the Category III Medium & Low-Pressure Vessel Manufacturing License, the ASME "U" Stamp authorization, and ISO9001 registration. Our facility employs a dedicated workforce of 120 people, including 3 senior engineers and over 20 professional design, quality assurance, and mechanical engineers.
Maximizing efficiency requires analyzing the entire starch by-product processing stream. Jiangsu Zongheng specializes in engineering complete processing lines. In a typical wet milling starch factory, the fiber recovery process integrates three core technologies:
1. The Dewatering Stage (Single Screw Press): Raw starch fiber slurry is concentrated from approximately 80% moisture down to 55-60%. The squeezed liquid (sweet water/filtrate) contains soluble proteins and starches.
2. Concentration Stage (Falling Film Evaporators / MVR): The press filtrate is pumped to our energy-saving Falling Film Evaporators or MVR (Mechanical Vapor Recompression) Evaporators. The dilute steepwater is concentrated into heavy steepwater (concentrated steep liquor - CSL) of 45-50% dry solids.
3. Drying Stage (ZXG Tube Bundle Dryer): The dewatered fiber cake is blended with the concentrated corn steep liquor (CSL) and fed into the Jiangsu Zongheng ZXG Tube Bundle Dryer. This indirect steam-heated drying process yields high-protein corn gluten feed (CGF) with a stable final moisture of 10-12%.
By designing and matching these components in-house, we eliminate engineering bottlenecks, maximize heat integration, and lower thermal losses across the factory.
Establishment of Yixing Yangxi Light Industrial Machinery Factory (predecessor), covering 15 mu of land with 45 employees, supplying primary processing parts for domestic food machinery.
Obtained international ISO9001 quality system certification, standardizing manufacturing processes and paving the way for larger industrial installations.
Formally recognized as a Jiangsu Provincial High-Tech Enterprise, reinforcing investments in thermal drying and mechanical separation technologies.
Granted the Special Equipment Manufacturing License of the People's Republic of China (License No.: TS2232C42) for fabricating safety-critical industrial pressure vessels.
Acquired the ASME "U" Stamp authorization, marking a critical milestone to export starch industry equipment and pressure vessels to North America and Western Europe.
Achieved international quality system certification (Certificate No.: 45021), establishing a complete quality assurance network matching global standards.
Operations cover 54,000+ m² total area with 22,000+ m² workshops. Supported by 120 skilled staff and over 23 mechanical engineers designing advanced dewatering solutions.
Looking toward the next generation of corn wet milling, our engineering focus revolves around smart automation and advanced metallurgical wear coatings:
Our single screw press is engineered to process wet corn fiber slurries with an initial moisture content of 78% to 83% and reduce it down to a consistent press cake moisture of 55% to 60%. The final output depends on screen slot size, screw rotation speed, and the presence of fine starch/protein fractions within the slurry.
All wetted components—including the main conveyor screw, dewatering screen basket, inlet hopper, and filtrate collection chamber—are fabricated from corrosion-resistant SUS316L or Duplex Stainless Steel (2205). Standard stainless steel like SUS304 is avoided to prevent micro-pitting caused by high concentrations of sulfur compounds and organic acids.
Yes. The screen baskets are designed with a split cylindrical architecture, enabling easy removal and replacement. We offer custom wedge-wire gap widths ranging from 0.25mm to 1.0mm. Selecting the correct gap size depends on balancing the filtration rate with the target solid recovery yield.
Corn fiber contains abrasive starches and grit. To prevent wear along the flight edge, we apply a hard-facing layer of tungsten carbide alloy using a specialized thermal spray process. This protective layer maintains the clearance between the screw flights and the screen surface, preventing loss of dewatering performance over time.
Decanter centrifuges are excellent for fine starch/gluten isolation, but they demand high electrical power and carry higher maintenance costs. A screw press is a cost-effective, low-energy solution for coarse fibers. Utilizing a screw press upstream of the thermal dryer is often the most economical choice.
Yes. Jiangsu Zongheng possesses the ASME "U" Stamp authorization, ISO9001 quality system certification, and the Chinese Special Equipment Manufacturing License (TS2232C42). This allows us to supply certified equipment and medium-to-low pressure vessels to refining facilities around the globe.
Contact our application engineering team today for custom sizing, process layouts, and detailed project quotes.
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