In modern chemical synthesis, municipal sludge treatment, and starch processing plants, regulatory compliance acts as a baseline indicator of mechanical, electrical, and structural safety. For heavy-duty industrial equipment like the Multi Plate Screw Press, CE Certification is not merely a regional regulatory requirement for entering the European Economic Area; it represents a globally recognized seal of safety, reliability, and engineering excellence. Valid CE marking indicates rigorous compliance with relevant directives, such as the Machinery Directive (2006/42/EC), the Low Voltage Directive (2014/35/EU), and the EMC Directive (2014/30/EU).
As manufacturers specializing in advanced filtration, we integrate safety features into the design phase of our screw press systems. Every structural element—from the high-torque gearbox and electrical control panels (often enclosed to IP65 standards) to the mechanical housing that prevents splash and aerosol emissions—is developed to protect operators and the surrounding plant infrastructure. Under the strict guidelines of global quality standards, our engineering team ensures that every press shipped provides long-term operational safety, lowering insurance risk profiles and simplifying local environmental compliance audits.
"By employing strict regulatory standards, CE-certified screw presses safeguard structural integrity under continuous pressure load, ensuring high uptime and predictable maintenance cycles."
The Multi Plate Screw Press operates via a series of alternating fixed and moving rings. This design offers a significant advantage over conventional filter presses or decanter centrifuges by providing self-cleaning, non-clogging operation.
The center shaft of the screw press has a variable pitch and a tapered core. As the screw rotates, the gaps between the rings and the screw flights shrink, generating progressive hydraulic pressure. Flocculated sludge is fed into the chamber, where:
This continuous mechanics cycle consumes a fraction of the energy required by centrifuges and uses significantly less washwater than belt filter presses.
Solid-liquid separation technology is shifting toward higher automation, smaller physical footprints, and lower energy usage. The technical roadmap for our next-generation Multi Plate Screw Presses focuses on the following key areas:
Energy-efficient falling film, MVR, and forced circulation evaporation systems engineered to concentrate heat-sensitive liquids and industrial wastewater.
Designed for industrial-scale dewatering of high-solids mixtures, providing stable cake discharge and reliable throughput.
Indirect steam-heated dryers that ensure low-oxygen, high-safety drying of organic materials such as corn germ, gluten, and DDGS.
Employs high-speed hot air streams to suspend and instantaneously dry fine, granular, and powdery products without thermal degradation.
High-efficiency precision germ removal technology for maize starch milling plants, optimizing separation yield and purity.
YDX hydrocyclone systems designed to wash, refine, and concentrate raw starch suspensions with minimal water consumption.
Jiangsu Zongheng's MQG Airflow Dryer employs high-speed hot air to suspend and fluidize the material. By utilizing impulse airflow generated from precisely varied tube diameters, it continuously tumbles the particles while conveying them. This design ensures rapid, uniform, and efficient drying throughout the entire transportation process within the system.
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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.
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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 Taihu Lake. The company covers an area of over 54,000 square meters, with a production workshop area of over 22,000 square meters.
We are a modern high-tech enterprise specializing in the manufacturing of concentration, drying, starch industry, alcohol DDGS, and Category III medium & low-pressure vessel equipment. As an active member of the China Starch and Alcohol Association, our custom industrial installations are widely used in food fermentation, starch refining, chemicals, pharmaceuticals, environmental protection, and petrochemical sectors.
Modern process industries produce high-density slurries and sludges that require customizable handling equipment. The chemical composition, particulate size distribution, and shear sensitivity of sludge vary by sector.
Biological sludges contain cell-bound water that is notoriously difficult to release. Our Multi Plate Screw Press systems use optimized polymer conditioning steps to flocculate cellular biomass, building robust flocs that dewater rapidly. The slow rotation speed of the screw (typically 1 to 3 RPM) prevents shear degradation, preserving cake dryness.
Starch processing facilities (relying on Starch Washing Cyclones and Degerming Mills) generate effluent high in organic content. Incorporating our Multi Plate Screw Press alongside our Falling Film and MVR Evaporators allows starch plants to recover organic solids, recycle clean water, and reduce waste volumes.
Chemical wastewater often carries corrosive materials and fine solids. We address these conditions by constructing our screw presses using high-grade SUS304 or SUS316L stainless steel. This metallurgy, combined with acid-resistant seal kits, protects the equipment in aggressive environments.
Located in Yixing, Jiangsu Province—a central hub for manufacturing environmental technology—Jiangsu Zongheng maintains a highly integrated domestic supply chain. Having complete design and manufacturing operations under one roof allows us to bypass external sub-assembly delays, providing stable delivery times even during global supply chain disruptions.
Our production processes utilize automated laser cutting machines, high-precision lathe machinery, and advanced welding robots. By standardizing manufacturing tolerances for the rings and screw shafts, we ensure that every replacement part fits precisely, minimizing friction wear and extending the lifespan of our equipment.
Our Quality Control protocols are certified to ISO9001 and ASME "U" standards. We trace all raw material batches, inspect structural welds, and test run every screw press under load before it leaves our facility.
Our facility covers over 54,000 m², with 22,000 m² of workshop space. We employ 3 senior engineers, over 20 engineers, and a total staff of 120 people.
Obtained 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 the high-pressure and international vessel engineering sector.
Obtained the Special Equipment Manufacturing License of the People's Republic of China (License No.: TS2232C42).
Officially recognized as a Jiangsu Provincial High-Tech Enterprise, acknowledging our innovations in evaporation and drying systems.
The company took the lead in obtaining ISO9001, setting quality control standards for Yixing’s machinery sector.
Established as Yixing Yangxi Light Industrial Machinery Factory, covering approximately 15 mu with a dedicated team of 45 employees.
Concentrating high-salinity industrial and organic wastewater.
Application Details
Automated solid-liquid separating machines for civil sewage plants.
Application Details
Jiangsu Zongheng implements quality control across all design and manufacturing stages. From plate cutting to mechanical assembly, our procedures conform to international industrial codes, including ASME (U Stamp), CE, and ISO9001.
The Multi Plate Screw Press operates at low rotational speeds (1–3 RPM), which reduces power consumption to 5%–10% of that required by a high-speed decanter centrifuge. It runs quietly, generates minimal wear, and operates without continuous operator supervision. Additionally, its self-cleaning mechanism prevents clogging, even when handling oily sludges that typically cause issues in centrifuges or belt filter presses.
CE certification ensures that the screw press meets European safety directives for mechanical design, electrical integration, and electromagnetic compatibility. This includes requirements for emergency stops, enclosed protective housings, overload protection, and compliant control cabinets. This certification verifies that the equipment meets international standards for industrial deployment.
Before entering the screw press, sludge is mixed with a polymer coagulant in a flocculation tank equipped with a slow-speed paddle mixer. The polymer aggregates the colloidal particles into larger flocs. This step is necessary to achieve high water-release rates and clean filtrate discharge.
With correct polymer dosing and grit removal, the moving and fixed rings can operate for 30,000 to 50,000 hours before requiring replacement. Regular maintenance is minimal, focusing on checking the gearbox oil level, lubricating the main bearings, and inspecting the wear indicators on the screw flights.
Get in touch with our engineering team to discuss your process, material specs, and dewatering goals. We provide customized design and sizing services.
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