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Help CenterSteam Driven Multi-Effect Evaporator for Desalination, 4-Effect, 15-30 M³/h, DCS Control
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Qingdao Conqinphi Environmental Technology Group Co., Ltd., established in 2015 with a factory spanning 10,000–30,000 square meters and over 200 skilled employees, presents our Steam Driven Multi-Effect Evaporator for Desalination. This 4-effect system delivers a capacity of 15–30 m³/h and is equipped with advanced DCS (Distributed Control System) for precise process automation. Designed to tackle the challenges of seawater desalination, our evaporator offers reliable performance, energy efficiency, and low operational costs, making it an ideal solution for municipal water supply, industrial process water, and remote coastal communities.
At the core of this evaporator is the multi-effect distillation technology, which utilizes steam as the heat source to recover latent heat across multiple stages. Each effect operates at a progressively lower pressure and temperature, maximizing thermal efficiency and minimizing steam consumption. The 4-effect configuration strikes an optimal balance between capital expenditure and operating cost, providing a robust and proven method for turning seawater into fresh water.
Key Features
- High Thermal Efficiency: The multi-effect design reuses vapor from each effect as heating medium for the next, achieving a Gained Output Ratio (GOR) of 4–5, significantly reducing steam consumption.
- DCS Control System: Fully automated control with real-time monitoring of temperature, pressure, flow rate, and water quality. The DCS allows remote operation and data logging, enhancing operational safety and ease of maintenance.
- Robust Construction: Made from corrosion-resistant materials such as 316L stainless steel or duplex stainless steel (optional), ensuring long service life in aggressive saline environments.
- Flexible Capacity: The unit is designed to handle 15–30 m³/h of fresh water output, with turn-down capability to match varying demand.
- Low Scaling Potential: The evaporator adopts a falling film or forced circulation design (configurable) to minimize scale formation, reducing cleaning frequency and chemical usage.
- Compact Skid-Mounted Design: Pre-assembled and tested in our factory, reducing on-site installation time and cost. The skid footprint is optimized for space-constrained sites.
- Environmentally Friendly: No chemical additives required for the basic process; brine discharge is at near-ambient temperature, minimizing thermal pollution.
Technical Specifications
| Parameter | Value |
| Number of Effects | 4 |
| Fresh Water Capacity | 15–30 m³/h |
| Steam Supply Pressure | 3–6 bar(g) (saturated steam) |
| Steam Consumption (approx.) | 0.2–0.25 kg per kg of distillate |
| Product Water Quality | |
| Control System | DCS with HMI touch screen |
| Power Consumption | 3–5 kW (pumps & controls) |
| Materials of Construction | SS316L / Duplex SS (optional) |
Benefits for Your Business
- Lower Operating Cost: The high GOR reduces steam demand by up to 75% compared to single-effect evaporators, cutting fuel or electricity expenses.
- Minimal Downtime: The DCS system provides predictive maintenance alerts and automatic cleaning cycles, ensuring continuous operation and reducing unplanned stops.
- Scalable Solution: Multiple units can be combined for larger capacities; our engineering team can customize the system to meet site-specific requirements.
- Easy Integration: The evaporator can be coupled with existing heat sources (e.g., waste steam from power plants, industrial boilers) or renewable energy systems.
- Compliance with International Standards: Our manufacturing facilities are ISO9001, ISO14000, and OHSAS18001 certified, and we follow strict quality control procedures.
With an annual export value exceeding US$10 million and a global presence spanning North America, Europe, Asia, Africa, and Oceania, Qingdao Conqinphi has delivered over 300 water treatment projects worldwide. Our team of 200+ professionals ensures that every evaporator is built to the highest standards of reliability and efficiency. We provide comprehensive after-sales support, including on-site commissioning, training, and spare parts availability.
Invest in the Steam Driven Multi-Effect Evaporator from a trusted manufacturer with a proven track record. Contact us today to discuss your desalination requirements and receive a customized proposal. Together, we can turn seawater into a sustainable water resource for your community or industry.
Frequently Asked Questions
Q1: What is the typical payback period for this evaporator?
A: The payback period depends on local energy costs, water demand, and brine disposal costs. Generally, for a 20 m³/h unit operating 8,000 hours per year, the payback can be achieved within 2–4 years when compared to trucking water or using reverse osmosis with high pretreatment costs.
Q2: Can this evaporator handle high-salinity brine or produced water?
A: Yes, the multi-effect evaporator is suitable for seawater (35,000 ppm TDS) and can also be adapted for higher salinity feed up to 100,000 ppm TDS with appropriate material selection and scaling mitigation measures. We recommend a pilot test for specific brines.
Q3: What kind of steam quality is required?
A: Saturated steam at 3–6 bar(g) is ideal. Low-pressure steam from cogeneration or waste heat can be used with minor modifications. Our team can design a steam booster if needed.
Q4: How often does the evaporator need to be cleaned?
A: Cleaning frequency depends on feed water quality and operating conditions. Typically, a chemical cleaning cycle is required every 3–6 months. The DCS system can schedule automatic cleaning-in-place (CIP) to minimize downtime.
Q5: Is the DCS system compatible with existing SCADA networks?
A: Yes, our DCS supports standard communication protocols such as Modbus, Profibus, and OPC. It can be easily integrated into your plant's supervisory system.
Q6: What warranty do you offer?
A: We provide a standard 12-month warranty from the date of commissioning, covering manufacturing defects. Extended warranty options are available upon request.
Q7: Can the capacity be adjusted after installation?
A: The unit is designed for a nominal capacity range of 15–30 m³/h. Operation outside this range may affect efficiency. However, we can design a modular system where additional effects can be added to increase capacity.
Q8: How long does it take to manufacture and deliver?
A: Typical lead time is 8–12 weeks after order confirmation, depending on customization requirements. We ship from Qingdao Port, and delivery time to destination varies by location.
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