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Qingdao Conqinphi Environmental Technology Group Co., Ltd. has been a trusted manufacturer of advanced environmental solutions since 2015. With a factory spanning 10,000–30,000 square meters and an annual export value exceeding US$10 million, we serve clients across North America, Europe, Asia, and beyond. Our Ammonia-based Desulfurization Evaporation and Crystallization Solution is designed to efficiently treat flue gas desulfurization (FGD) wastewater while recovering valuable by-products. This integrated system combines evaporation and crystallization technologies to achieve zero liquid discharge (ZLD) and produce high-purity ammonium sulfate fertilizer, turning waste into a resource.
The solution is ideal for coal-fired power plants, steel mills, and chemical facilities that use ammonia-based FGD processes. It addresses the challenges of high chloride content, scaling, and energy consumption through intelligent design and robust materials. Below, we detail the key features, technical specifications, and benefits that make this system a cost-effective and sustainable choice for your operations.
Key Features
- High Recovery Rate – Up to 99% water recovery, minimizing freshwater intake and wastewater discharge.
- Pure Ammonium Sulfate Crystals – Crystallization yields >98% purity, suitable for agricultural fertilizer use.
- Anti-Scaling Design – Specialized heat exchanger and crystallizer geometry reduce scaling even with high Ca²⁺ and Mg²⁺ content.
- Low Energy Consumption – Mechanical vapor recompression (MVR) technology reduces energy usage by 30–50% compared to traditional evaporators.
- Fully Automated Control – PLC-based system with remote monitoring ensures stable operation and minimal manual intervention.
- Corrosion-Resistant Materials – Main components are made of SS316L or higher-grade alloys to withstand acidic and chloride-rich environments.
Technical Specifications
| Parameter | Value / Range |
| Processing Capacity | 10 – 200 tons/day (customizable) |
| Evaporation Temperature | 60 – 90 °C (adjustable) |
| Product Purity (Ammonium Sulfate) | ≥98% |
| Power Consumption | 30 – 60 kWh per ton of water evaporated |
| Operating Pressure | Atmospheric to slightly negative |
| Control System | PLC + HMI, remote access available |
Advantages & Benefits
- Zero Liquid Discharge (ZLD) – Eliminates wastewater discharge, helping you meet stringent environmental regulations.
- Valuable By-Product – Produces high-quality ammonium sulfate that can be sold as fertilizer, offsetting operational costs.
- Reduced Carbon Footprint – Lower energy consumption and waste generation contribute to your sustainability goals.
- Long Service Life – Robust construction and corrosion-resistant materials ensure durability with minimal maintenance.
- Quick ROI – Typical payback period of 2–3 years based on fertilizer sales and water savings.
Our system is delivered as a complete skid-mounted package, simplifying installation and reducing onsite construction time. We provide comprehensive technical support, including process design, commissioning, and training for your operators. With over 200 employees and a dedicated R&D team, Qingdao Conqinphi ensures that every solution is tailored to your specific wastewater composition and site conditions.
Certifications & Quality Assurance – Our factory holds ISO9001, ISO14000, OHSAS18001, and other international standards. We have successfully delivered projects to clients in more than 30 countries, including power plants in Southeast Asia and steel mills in South America. The port of Qingdao ensures efficient global shipping, and our after-sales service network provides prompt response to any technical queries.
By choosing our ammonia-based desulfurization evaporation and crystallization solution, you are investing in a proven technology that reduces environmental impact while generating additional revenue. Contact us today to discuss your specific requirements and receive a customized proposal with detailed engineering data.
Frequently Asked Questions (FAQ)
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Q: What is the typical recovery rate of ammonium sulfate?
A: Under optimal conditions, the system achieves over 98% purity and recovery rate of more than 95% of the ammonia sulfate present in the feed. -
Q: How does the system handle high chloride concentrations?
A: The design includes a dedicated purge stream and corrosion-resistant materials (SS316L or higher) to manage chlorides up to 20,000 ppm without affecting performance. -
Q: Can the system be customized for different feed compositions?
A: Yes, we offer customized solutions based on your wastewater analysis. The evaporation temperature, crystallization parameters, and material selection can be adjusted accordingly. -
Q: What is the estimated energy consumption per ton of wastewater?
A: With MVR technology, energy consumption ranges from 30 to 60 kWh per ton of water evaporated, depending on the feed concentration and ambient conditions. -
Q: What certifications do your products hold?
A: Our manufacturing facility is certified under ISO9001, ISO14000, OHSAS18001, and other standards. Specific project certifications can be provided upon request. -
Q: What is the typical lead time for delivery?
A: Standard lead time is 12–16 weeks after order confirmation, depending on capacity and customization level. We can arrange expedited delivery for urgent projects. -
Q: What after-sales support do you offer?
A: We provide remote monitoring, 24/7 technical support, spare parts supply, and optional on-site maintenance contracts. Our team offers training for your operators to ensure smooth operation. -
Q: How does this solution compare to limestone-gypsum FGD systems?
A: Ammonia-based systems produce a valuable fertilizer by-product and can achieve ZLD, whereas limestone-gypsum generates gypsum sludge that requires disposal. Our solution is particularly advantageous when there is a market for ammonium sulfate.
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