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Welcome to Qingdao Conqinphi Environmental Technology Group Co., Ltd. – a trusted manufacturer specializing in advanced Multi-Effect Evaporation (MEE) Vacuum Salt Plant Evaporators for seawater desalination. Founded in 2015, our company occupies a modern factory spanning 10,000–30,000 square meters, employs 201–300 skilled professionals, and achieves an annual export value of US$10 million – US$50 million. With a strong commitment to innovation and quality, we deliver robust, energy-efficient evaporation solutions that convert seawater into high-purity fresh water and crystalline salt. Our MEE vacuum salt plant is designed to maximize heat recovery, minimize operating costs, and meet the demanding requirements of industrial desalination and salt production.
Product Overview: The MEE vacuum salt plant uses multiple effect evaporators operating under vacuum to efficiently evaporate water from seawater, producing both fresh water and salt. By reusing vapor from one effect as heating medium for the next, thermal energy consumption is drastically reduced. The vacuum environment lowers boiling points, enabling operation at lower temperatures and reducing scaling and corrosion. This system is ideal for large-scale seawater desalination, salt recovery, and brine concentration.
Key Features & Technical Specifications
- High Energy Efficiency: Multi-effect design reduces steam consumption by up to 60% compared to single-effect evaporators. Typical steam consumption: 0.2–0.3 kg steam per kg water evaporated (depending on number of effects).
- Vacuum Operation: Operating pressure as low as -0.09 MPa, lowering boiling point to 60–80°C, minimizing scale formation and allowing use of low-grade heat sources.
- Robust Construction: Available in stainless steel 316L, duplex stainless steel, or titanium for corrosion resistance in saline environments. Customizable materials upon request.
- Flexible Capacity: Evaporation capacities from 1 ton/h to 100 ton/h, tailored to client requirements. Multiple effects (3–7 effects) can be configured.
- Integrated Salt Recovery: Designed with salt crystallizer and centrifugal separation system to produce high-purity salt (NaCl > 99.5%).
- Automatic Control: PLC-based control system with HMI touchscreen for real-time monitoring of temperature, pressure, flow, and conductivity. Remote operation available.
- Low Maintenance: Anti-scaling design, easy cleaning, and durable components reduce downtime and maintenance costs.
| Parameter | Value |
| Number of Effects | 3 – 7 (customizable) |
| Evaporation Capacity | 1 – 100 ton/h |
| Steam Consumption | 0.2 – 0.3 kg steam/kg water |
| Cooling Water Requirement | 10 – 20 m³/h per ton/h evaporation |
| Operating Temperature | 60 – 80 °C |
| Vacuum Degree | ≤ -0.09 MPa |
| Salt Purity | ≥ 99.5% NaCl |
| Material of Construction | SS316L / Duplex SS / Titanium (optional) |
Advantages & Customer Benefits
- Lower Operating Costs: Reduced steam and electricity consumption directly improve your bottom line.
- High Product Quality: Produces fresh water meeting WHO standards and high-purity salt suitable for industrial or food-grade use.
- Environmental Sustainability: Zero liquid discharge (ZLD) achievable with brine concentration; minimal chemical usage.
- Reliable Performance: Robust design withstands harsh seawater conditions; proven in many coastal and inland projects.
- Turnkey Solutions: We provide engineering, fabrication, installation, and commissioning support.
Why Choose Qingdao Conqinphi? As a manufacturer with over 200 employees and a 10,000–30,000 m² facility, we have the capability to produce large-scale evaporators efficiently. Our products are certified with ISO9001, ISO14000, HACCP, SA8000, OHSAS18001 and many other international standards, ensuring quality and safety. We export to North America, South America, Europe, Africa, Middle East, Southeast Asia, and Oceania, with annual export value exceeding US$10 million. Our experienced team supports customization, fast delivery (via Qingdao port), and after-sales service. We are dedicated to helping you achieve efficient seawater desalination and salt recovery.
Contact us today to discuss your project requirements. Our engineers will provide a tailored solution, detailed proposal, and competitive pricing. Join hundreds of satisfied customers worldwide who trust Conqinphi for their evaporation needs.
Frequently Asked Questions
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Q: What is the working principle of the MEE vacuum salt plant?
A: The system uses multiple evaporation stages (effects) under vacuum. Seawater is heated in the first effect; the vapor generated is used to heat the next effect, and so on. Vacuum lowers boiling points, saving energy. The final concentrated brine goes to a crystallizer to produce salt, while the condensed vapor becomes fresh water. -
Q: What capacity range is available?
A: We offer capacities from 1 ton/h to 100 ton/h of water evaporation. Custom designs for larger scales are available upon request. -
Q: What materials are used for corrosive seawater?
A: Standard material is SS316L. For higher corrosion resistance, we offer duplex stainless steel, titanium, or other alloys. The choice depends on chloride concentration and temperature. -
Q: How is energy consumption compared to other desalination methods?
A: MEE is more energy-efficient than single-effect evaporation and can be competitive with RO when low-grade steam or waste heat is available. Steam consumption is around 0.2–0.3 kg/kg water, much lower than mechanical vapor compression (MVC) in some cases. -
Q: Is the system customizable for different brine feed compositions?
A: Yes. We design the evaporator and crystallizer based on your feed water analysis (TDS, composition, pH). The number of effects, heat exchanger area, and auxiliary equipment are optimized accordingly. -
Q: What certifications does your company hold?
A: Our factory is certified with ISO9001, ISO14000, HACCP, SA8000, OHSAS18001, and many other standards. We also comply with international quality requirements for pressure vessels and piping. -
Q: What is typical delivery time and shipping port?
A: Delivery time depends on capacity and customization, typically 3–6 months. All equipment is shipped from Qingdao Port, China, with full export documentation. -
Q: Do you provide after-sales service and technical support?
A: Yes. We offer commissioning guidance, on-site installation supervision if needed, spare parts supply, and remote technical support via phone/email. Our team is available 24/7 for urgent issues.
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