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Our flagship evaporation systems are purpose-built for high-salinity, high-color-intensity textile dye wastewater, delivering up to 75% steam savings versus single-effect systems and enabling near-zero liquid discharge (ZLD) compliance.
The global textile industry discharges an estimated 200 billion liters of dye-laden wastewater annually. Stricter environmental regulations and rising water treatment costs are driving unprecedented demand for high-efficiency volume reduction technologies.
A single mid-scale textile dyeing facility can generate 500–5,000 m³ of high-COD, high-salinity wastewater per day. Without effective volume reduction, disposal costs are prohibitive and regulatory non-compliance is inevitable.
Textile dye wastewater contains reactive dyes, disperse dyes, azo compounds, surfactants, and inorganic salts at concentrations that challenge conventional biological treatment — making physical evaporation the preferred pre-treatment or primary treatment route.
China's GB 4287-2012 and EU BREF standards now mandate COD <80 mg/L and color <50 (dilution factor) in final effluent, pushing mills to adopt advanced evaporative concentration as a core compliance strategy.
💡 Key Insight: Quadruple Effect Evaporators can reduce textile dye wastewater volume by up to 85–95%, concentrating pollutants for downstream incineration or salt recovery, while the distillate water quality meets reuse standards — achieving both environmental compliance and economic return simultaneously.
The quadruple effect configuration passes steam energy through four sequential evaporation stages, extracting maximum thermal value from each kilogram of steam input — a principle that makes it the gold standard for large-volume textile effluent treatment.
Raw dye wastewater enters the first effect, heated by fresh live steam at the highest temperature/pressure. Initial evaporation removes 20–25% of water volume, generating secondary steam.
Secondary steam from Effect 1 drives Effect 2; Effect 2's vapor drives Effect 3. Each stage operates at progressively lower pressure and temperature, concentrating the liquor further while recovering latent heat.
Operating under vacuum conditions, the fourth effect achieves the highest concentration ratio at the lowest boiling point, protecting heat-sensitive dye constituents and maximizing overall water evaporation per unit of steam.
Clean condensate from all four effects is collected for process water reuse. Concentrated brine or dye sludge is discharged for incineration or salt crystallization, enabling Zero Liquid Discharge (ZLD) compliance.
Industry-verified performance data from Jiangsu Zongheng installations across textile and dye manufacturing facilities.
Beyond generic evaporation, Jiangsu Zongheng's quadruple effect systems are engineered for specific sub-sectors within the textile and dye industry, each with unique wastewater characteristics and treatment goals.
Reactive dyes used in cotton dyeing produce highly colored, high-salt wastewater (TDS 30,000–80,000 mg/L). Quadruple effect evaporation concentrates this stream 10–20×, enabling downstream sodium sulfate/sodium chloride salt recovery with purity >95%, converting waste into a saleable by-product and dramatically reducing hazardous waste disposal costs.
Polyester dyeing with disperse dyes generates effluent rich in surfactants, carriers, and fine dye particles. The falling-film quadruple effect configuration prevents fouling and scaling while achieving 80%+ volume reduction, making the concentrated residue suitable for co-incineration with coal in industrial boilers — recovering energy value from waste.
Dye synthesis facilities produce mother liquors and wash waters with extremely high COD (50,000–200,000 mg/L) and complex organic loads. A quadruple effect system with forced circulation evaporators handles viscous, scaling-prone feeds, reducing volume by 90%+ before incineration — the only technically viable route for many azo and anthraquinone dye wastes.
In water-scarce regions or areas with strict no-discharge mandates, the quadruple effect evaporator serves as the core pre-concentration unit in a ZLD train: pre-treatment → quadruple effect evaporation (volume reduction 90%+) → crystallizer → centrifuge → dry salt. Clean condensate (>98% recovery) is recycled to the dyeing process, achieving true closed-loop water management.
Modern textile industrial parks increasingly integrate waste heat from dyeing stenters, setting machines, and boiler flue gas into the quadruple effect evaporator's first-effect heating system. This waste heat evaporation configuration can reduce fresh steam consumption by an additional 30–50% compared to standard steam-fed quadruple effect designs, delivering exceptional ROI.
Beyond dye-specific streams, Jiangsu Zongheng's quadruple effect systems treat mixed organic/high-salinity wastewaters from finishing, bleaching, and mercerizing operations. The system's flexibility in handling TDS from 5,000 to 150,000 mg/L makes it a universal solution across the full textile value chain, from fiber preparation to garment finishing.
The intersection of tightening environmental policy, rising energy costs, and digital transformation is reshaping how textile manufacturers approach wastewater volume reduction — and quadruple effect evaporation is at the center of this evolution.
Next-generation quadruple effect evaporators are being equipped with AI-powered control systems that continuously optimize steam distribution, vacuum levels, and feed flow rates across all four effects in real time. Machine learning algorithms predict scaling events 24–48 hours in advance, enabling proactive CIP cycles and reducing unplanned downtime by up to 40%.
The integration of Mechanical Vapor Recompression (MVR) with quadruple effect evaporation is emerging as the new industry benchmark. By using MVR compressors to boost secondary steam from the fourth effect back to the first, these hybrid systems achieve steam consumption as low as 0.03–0.05 kg steam per kg water evaporated — a 90%+ reduction versus single-effect systems.
As textile production increasingly shifts to smaller, distributed facilities and industrial parks, demand for modular quadruple effect evaporators — pre-assembled on skids, plug-and-play ready — is growing rapidly. These factory-built units reduce on-site installation time by 60% and enable textile SMEs to access enterprise-grade evaporation technology within tighter capital budgets.
As China tightens discharge standards, textile production is migrating to Vietnam, Bangladesh, India, and Indonesia — where environmental regulations are rapidly catching up. Jiangsu Zongheng is actively exporting quadruple effect evaporation systems to these emerging markets, providing turnkey solutions including engineering, installation, commissioning, and operator training.
The economic case for quadruple effect evaporation is strengthening as recovered sodium sulfate and sodium chloride from concentrated dye wastewater achieve commercial purity grades. Forward-thinking textile groups are monetizing recovered salts at $80–200/ton, partially or fully offsetting evaporation operating costs and transforming wastewater treatment from a cost center into a profit opportunity.
Jiangsu Zongheng's latest quadruple effect systems feature digital twin technology — virtual replicas of the physical evaporator that run in parallel, enabling remote performance monitoring, predictive maintenance scheduling, and rapid troubleshooting by factory engineers without on-site visits. This is particularly valuable for overseas installations where local technical expertise may be limited.
Jiangsu Zongheng Concentration & 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.
The company's other main products include Tube Bundle Dryers, with design and manufacturing capabilities reaching 1600m² (making it a primary manufacturer of large tube bundle dryers). Other main products such as Single Screw Fiber & Germ Dehydrators and Wash Cyclones are recognized as high-quality products by starch manufacturers and the industry. High-quality products and a sincere service attitude have won consistent praise and trust from numerous users at home and abroad, fully demonstrating the company's first-class technical advantages and manufacturing capabilities for large-scale equipment.
Jiangsu Zongheng is always committed to exploration and innovation. Through years of sincere effort and user support, it has achieved sustained development. Main products include evaporation plants, comprising Multi-Effect Evaporators, Thermal Vapor Recompressors (TVR), Waste Heat Evaporators, and Mechanical Vapor Recompressors (MVR, achieving minimal unit energy consumption). These are widely used for liquid concentration, including distillates, alcohol stillage, ammonium sulfate, corn steep liquor, itaconic acid, threonine, starch sugar, sorbitol, glucose, fructose, trehalose, erythritol, organic wastewater, high-salinity wastewater, etc., making the company one of the domestic manufacturers with the most extensive product variety.
In March 2002, the company took the lead in obtaining ISO9001:2015 international quality system certification (Certificate No.: 45021), establishing a complete quality assurance system aligned with international standards. In July 2007, it became a Jiangsu Provincial High-Tech Enterprise. In April 2009, the company obtained the Special Equipment Manufacturing License of the People's Republic of China (License No.: TS2232C42). In August 2012, it acquired the ASME "U" Stamp authorization, marking the company's entry into a new phase of development. The company possesses strong R&D capabilities and advanced manufacturing processes, currently employing over 3 senior engineers and more than 20 engineers and assistant engineers. Multiple innovative technologies have been patented, and many products hold leading positions domestically.
The company currently holds an absolutely leading position in evaporation technology and has extensive cooperation with many renowned large domestic group companies, including Zhuofeng Biology, Meihua Group, Yufeng Group, Yihai Kerry, North China Pharmaceutical Group, Harbin Pharmaceutical Group, Shouguang Juneng, Qilu Pharmaceutical, Qiyuan Pharmaceutical, Xiwang Group, Shengtai Biology, Zhejiang Huakang, Kelun Pharmaceutical (Yili), and Shandong Tianli.
Jiangsu Zongheng offers a comprehensive range of evaporation and concentration systems serving textile, chemical, pharmaceutical, food, and environmental industries worldwide.
While meeting domestic market demand, the company's DDGS alcohol equipment and tube bundle dryer series products have been exported to Russia and Southeast Asian markets. Our quadruple effect evaporators for textile dye wastewater volume reduction are increasingly deployed in Vietnam, Bangladesh, India, and Indonesia — markets experiencing rapid growth in both textile production capacity and environmental compliance requirements.
We are capable of providing professional technical support and after-sales service nationwide for our vast user base. High-quality products and their unique solutions not only enhance our corporate economic benefits but also bring us satisfaction by solving processing challenges for our clients.
We warmly welcome friends from various industries, both domestic and international, to visit us for cooperation and mutual development!
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