Advanced Concentration, Dewatering, and Evaporation Systems Engineered for Global Food & Chemical Processing Factories
In modern industrial potato processing (including starch separation, french fry lines, and potato pulp recovery), the extraction of clean moisture from solid waste streams is critical for operational efficiency and sustainability. High-performance mechanical dewatering is the crucial step bridging raw washing phases and energy-intensive thermal drying. Without optimized mechanical separation, downstream drying systems suffer from massive thermal inefficiencies, bottlenecking the entire production plant.
Potato starch fibers exhibit challenging physical profiles: they are highly hydrophilic, containing cell-wall bound moisture, starch residues, and slippery proteins. A standard gravity system fails to achieve the dryness levels needed for downstream operations. To address this, Jiangsu Zongheng utilizes custom-engineered High-Efficiency Single Screw Presses. These units squeeze water from the potato pulp by progressively narrowing the pitch and diameter of the screw flight within a highly resilient slotted screen cylinder, reducing moisture content from 85% down to less than 60% with minimal power consumption.
By implementing a robust mechanical phase prior to thermal dryers, processors can expect to cut steam consumption in their bundle or airflow dryers by up to 50%, representing an immense operational cost reduction and a much smaller carbon footprint.
While mechanical dewatering extracts free water, achieving a stable, powder-like starch product requires precision thermal treatment. For raw potato starch, the MQG Airflow Dryer uses instant high-speed hot air to suspend and dry moist potato starch grains in seconds. The sudden moisture flash ensures that starch particles do not gelatinize, maintaining high physical and chemical quality. The unique varying diameter of the airflow pipes generates localized pressure pulses, optimizing heat transfer coefficient without scorching the product.
For more dense fibrous residues, the ZXG Tube Bundle Dryer offers indirect steam drying with high thermal efficiency. The continuous rotation of the steam tubes guarantees uniform heating, preventing local hotspots and minimizing dust explosion risks under low-oxygen operation conditions.
To achieve a truly zero-discharge loop, the wash water from the starch cyclone extraction contains soluble proteins and minerals. Disposal of this juice without treatment causes massive COD/BOD loads. By routing the liquid to an energy-efficient MVR (Mechanical Vapor Recompression) Evaporation Plant or a Falling Film Evaporator, the water is distilled off for recycling, and the potato protein is concentrated, dried, and packaged as high-value animal feed.
Why Leading Starch Processing Groups Choose Jiangsu Zongheng for Turnkey Equipment
Located in Yixing, Jiangsu (Taihu Lake Basin), Zongheng operates in the heart of China's premium equipment manufacturing cluster. This provides immediate access to high-grade raw materials (SUS304/316L), specialized forging factories, and advanced surface-treatment suppliers.
From initial thermal and mechanical calculations to plate cutting, roll forming, certified welding, testing, and surface polishing, every step is completed in our own 54,000+ m² modern facility to guarantee absolute traceablity and consistent quality control.
By utilizing local manufacturing efficiencies and optimizing design geometry, Zongheng delivers dewatering and drying systems at a fraction of the cost of European brands, while meeting or exceeding equivalent structural and performance parameters.
Ensuring Seamless Integration, Safety Standards, and Cross-Border Support for Multinational Enterprises
Industrial machinery must conform to safety, environmental, and mechanical codes before deployment in various markets. Jiangsu Zongheng maintains a strict international standards compliance framework:
Our engineering team works directly with third-party testing bodies (such as TÜV, SGS, and Bureau Veritas) to inspect raw materials, welding joints via non-destructive testing (NDT), and structural integrity, delivering complete documentation packages with each equipment shipment.
Every agricultural processing plant operates under different constraints. We customize our dewatering and concentration installations for various local scenarios:
Over Three Decades of Growth, Technological Breakthroughs, and Industry Recognition
Today, the company operates a 54,000+ m² facility with 120+ staff, including 3 senior engineers and 20+ specialized design engineers, delivering projects to Europe, Asia, and the Americas.
Acquired 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 and high-pressure vessel fabrication.
The company obtained the Special Equipment Manufacturing License of the People's Republic of China (License No.: TS2232C42), securing credentials for pressure vessel manufacturing.
We became a Jiangsu Provincial High-Tech Enterprise, recognizing our investments in research, development, and innovative drying technologies.
The company took the lead in obtaining ISO9001 certification, standardizing internal management and product quality processes.
Jiangsu Zongheng (formerly Yixing Yangxi Light Industrial Machinery Factory) was founded on the shores of Taihu Lake, with 45 employees and a focus on food machinery.
Tailored Dewatering, Drying, and Separation Machinery for Starch, Alcohol, and Waste Recovery Operations
A Commitment to Certified Engineering Quality and Advanced Design Standards
Manufacturing Certification
ISO Quality Standard
Pressure Vessel License
ASME Compliance
Engineering Quality Award
CE Certification Mark
Patented Design Certificate
National Industry Member
Connect with our expert engineering team to design custom potato pulp dewatering, drying, or MVR evaporation systems tailored to your factory layout.
Review comprehensive schematics, power consumption projections, and ROI metrics with our senior application technicians.
Detailed Answers Addressing Design, Thermodynamics, Performance, and Maintenance of Starch Processing Equipment
Our Single Screw Press uses a progressive compression profile. The screw pitch narrows while the shaft diameter increases from the inlet to the outlet. This design reduces the volume within the press chamber, generating high mechanical pressure that forces moisture out through a precision slotted wedge-wire screen. This process overcomes the capillary forces holding water within the cell walls of the potato pulp without shearing the fibers, resulting in a consistent dewatering output with low power consumption.
Typically, raw potato starch pulp enters the dewatering line at about 80% to 85% moisture content. The Single Screw Press mechanically reduces this to roughly 55% to 60% cake. Next, the dewatered cake goes into the ZXG Tube Bundle Dryer, which thermally dries the solids down to a stable storage moisture level of 12% to 14%. Squeezing out the bulk water mechanically first helps processors save up to 50% on steam energy costs compared to direct thermal drying.
MVR (Mechanical Vapor Recompression) Evaporation is highly energy-efficient. Instead of using fresh live steam for each stage, MVR uses a centrifugal compressor to repressurize and heat the vapor evaporated from the product. This recycled vapor is then reused as the heating medium for the same stage. This thermal recycling loop cuts energy use by 70% to 80% compared to traditional multi-effect evaporators, making it ideal for processing high-volume potato wastewater streams.
Starch gelatinizes easily when exposed to heat and moisture over time. Our MQG Airflow Dryer avoids this by using co-current flash drying. High-velocity hot air disperses and carries the wet starch particles, drying them in just 1 to 3 seconds. The rapid evaporation keeps the actual starch temperature low (wet-bulb temperature limit), preserving the starch's native crystalline structure and quality.
We build all product-contact areas with high-grade SUS304 or SUS316L stainless steel. Acidic potato process water containing sulfur dioxide requires corrosion-resistant materials to prevent pitting. Using these premium alloys ensures long machinery life and complies with international food safety standards.
We hold the ASME "U" stamp, CE mark compliance, and China Special Equipment Manufacturing License. This lets us design, weld, test, and certify pressure vessels like heat exchangers and steam drums in line with European (PED) and North American codes.
Our screen cylinders feature a split-cage design for easy access. They are built from durable wedge wire that resists clogging. We recommend checking for screen wear every 3,000 to 4,000 operating hours. Cleaning is simple with built-in CIP (Clean-in-Place) spray nozzles that wash away organic fibers without having to disassemble the unit.
Large rotating equipment, like our ZXG Tube Bundle Dryer, undergoes dynamic and static balance testing after assembly. Heavy-duty roller bearings and a rigid, stress-relieved steel frame help prevent vibration, ensuring smooth operation, low wear, and safe, low-oxygen drying.
Explore Zongheng's Specialized Industrial Dryers, Evaporators, and Solid-Liquid Extraction Machinery
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