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Help CenterThree-Effect Evaporation Crystallization Unit, 304 Stainless Steel, Vacuum Type for High Purity Salt Recovery, ISO Compliant
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As a leading manufacturer with over 9 years of expertise in environmental technology, Qingdao Conqinphi Environmental Technology Group Co., Ltd. proudly presents our Three-Effect Evaporation Crystallization Unit — a high-performance solution designed for the demanding requirements of high purity salt recovery. Crafted from premium 304 stainless steel and operating under vacuum conditions, this unit delivers exceptional efficiency, energy savings, and product purity. Whether you are in the chemical, pharmaceutical, or wastewater treatment industry, our equipment is engineered to maximize your recovery rate while minimizing operational costs.
Our three-effect design leverages the principle of multiple-effect evaporation, where the vapor from one effect serves as the heating medium for the next, significantly reducing steam consumption. The vacuum environment lowers the boiling point of the solution, preventing thermal degradation and enabling gentle crystallization of sensitive salts. The result is a consistent, high-purity crystalline product that meets stringent quality standards.
Key Features & Technical Specifications
- Three-Effect Evaporation Design: Achieves up to 70% reduction in steam consumption compared to single-effect systems, thanks to the efficient heat recovery between effects.
- 304 Stainless Steel Construction: All wetted parts are made of 304 stainless steel, offering excellent corrosion resistance and durability, ideal for salt solutions and moderate acidic/alkaline streams.
- Vacuum Operation: Operating at reduced pressure (typically -0.05 to -0.09 MPa) lowers the boiling point, protecting heat-sensitive materials and enhancing crystal quality.
- High Purity Salt Recovery: The combination of controlled evaporation and crystallization yields salt crystals with purity exceeding 99% (depending on feed composition).
- Energy-Efficient: With a steam economy ratio of 1:3 (1 kg steam produces 3 kg evaporation), our unit greatly reduces energy costs.
- Automatic Control System: PLC-based control with touchscreen interface allows precise monitoring of temperature, pressure, flow rate, and crystal concentration. Optional remote monitoring available.
- Compact Footprint: The three-effect configuration is designed in a vertical or horizontal layout to save floor space, making it suitable for both new plants and retrofit projects.
- Customizable Capacity: Available in standard capacities from 500 L/h to 10,000 L/h (evaporation rate), with tailor-made solutions for specific process requirements.
- Compliance with International Standards: Manufactured under ISO 9001 quality management system, and meets ISO 14000 environmental standards, ensuring reliable and eco-friendly operation.
| Parameter | Specification |
|---|---|
| Material | 304 Stainless Steel (SUS304) |
| Number of Effects | 3 |
| Operating Pressure (Vacuum) | -0.05 to -0.09 MPa (adjustable) |
| Operating Temperature | 50°C – 90°C (depending on vacuum level) |
| Evaporation Capacity | 500 L/h – 10,000 L/h (customizable) |
| Steam Consumption | Approx. 0.33 kg steam per kg evaporation |
| Salt Purity Achievable | ≥ 99% (depending on feed) |
| Control System | PLC + HMI touchscreen, automatic or manual |
| Power Supply | 380V/50Hz (or as per local standard) |
| Certification | ISO 9001, ISO 14000, OHSAS 18001, etc. |
The Three-Effect Evaporation Crystallization Unit is particularly suitable for recovering high-purity salts such as sodium chloride, sodium sulfate, ammonium chloride, and potassium chloride from industrial wastewater or process streams. The vacuum environment ensures that even thermally unstable compounds can be crystallized without decomposition. Additionally, the unit can be integrated with pre-treatment systems (e.g., filtration, softening) to further enhance product quality.
Customer Benefits
- Reduced Operating Costs: Lower steam consumption by up to 70% compared to single-effect evaporators, translating to significant savings in energy bills.
- High Product Purity: The vacuum and controlled crystallization produce salts with minimal impurities, meeting the requirements for reuse or sale.
- Minimal Maintenance: 304 stainless steel construction resists corrosion and scaling, extending equipment lifespan and reducing downtime.
- Eco-Friendly: By recovering valuable salts and reducing wastewater volume, the unit supports sustainable manufacturing and circular economy goals.
- Scalable & Flexible: Modular design allows easy expansion or modification to match changing production needs.
At Qingdao Conqinphi, we have delivered over 200 evaporation and crystallization systems to clients worldwide since 2015. Our factory spans 10,000–30,000 square meters, staffed by 201–300 experienced professionals. With an annual export value exceeding US$10 million, we serve markets across North America, Europe, Asia, Africa, and Oceania. Our products are shipped from the port of Qingdao, and we provide comprehensive after-sales support, including installation guidance, commissioning, and training.
We are committed to quality and compliance. Our manufacturing processes are certified under ISO 9001, ISO 14000, OHSAS 18001, and other international standards. Every unit undergoes rigorous testing before shipment to ensure it meets your specifications. Choose Conqinphi for reliable, efficient, and cost-effective evaporation crystallization solutions.
Frequently Asked Questions (FAQ)
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Q: What is the typical payback period for this three-effect evaporation unit?
A: The payback period depends on factors such as steam cost, operating hours, and salt value. In many cases, clients see a return on investment within 12–18 months due to the energy savings and high-purity product value. -
Q: Can the unit handle feed solutions with high suspended solids or scaling tendency?
A: Yes, we recommend installing a pre-treatment system (e.g., sedimentation, filtration, or anti-scalant dosing) to protect the evaporator. Our design includes options for forced circulation to minimize scaling. -
Q: What is the maximum salt concentration achievable in the crystallizer?
A: The unit can concentrate the salt solution up to near saturation, typically 25–35% by weight, depending on the solubility of the specific salt. The crystallizer then produces solid crystals with a slurry density of 20–40% solids. -
Q: Is the equipment suitable for food-grade salt production?
A: Absolutely. The 304 stainless steel construction and vacuum operation prevent contamination. With proper cleaning and control, the recovered salt can meet food-grade standards. We also offer optional sanitary design modifications. -
Q: What kind of vacuum system is used?
A: Typically, we use a liquid ring vacuum pump or a steam jet ejector, depending on the vacuum level required and available utilities. Both options are reliable and efficient. -
Q: How long does it take to install and commission the unit?
A: Installation typically takes 2–4 weeks, and commissioning 1–2 weeks, depending on site conditions and complexity. Our engineers provide on-site supervision and training for your team. -
Q: Can the unit be integrated with existing control systems (SCADA/DCS)?
A: Yes, the PLC controller supports standard communication protocols (Modbus, Profibus, etc.) for seamless integration with your plant network. -
Q: What warranty do you offer?
A: We provide a standard 12-month warranty from the date of shipment, covering manufacturing defects. Extended warranty and maintenance contracts are available upon request.
Contact us today for a customized solution that fits your specific salt recovery needs. Our team of engineers is ready to assist with technical proposals, quotations, and after-sales support. Choose Qingdao Conqinphi — your trusted partner in environmental technology.
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