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Qingdao Conqinphi Environmental Technology Group Co., Ltd. presents our advanced MVR Continuous Freeze Crystallization System, engineered for achieving Zero Liquid Discharge (ZLD) in wastewater treatment. This innovative system leverages mechanical vapor recompression combined with continuous freeze crystallization to separate pure water from high-concentration brines and industrial effluents, offering a sustainable, energy-efficient solution for industries facing stringent discharge regulations. With over 8 years of manufacturing expertise and a factory spanning 10,000-30,000 square meters, we deliver reliable, high-performance equipment tailored to your specific wastewater challenges.
Our system operates at low temperatures, minimizing scaling and corrosion issues common in traditional evaporative crystallizers. It effectively recovers high-quality water for reuse while reducing the volume of waste to a solid salt byproduct, aligning with circular economy principles. Whether you are in the chemical, pharmaceutical, petrochemical, or mining sector, this MVR freeze crystallization technology provides a robust pathway to environmental compliance and operational cost savings.
Below, we detail the key features, technical specifications, and benefits that make our system a top choice for ZLD applications.
Key Features and Advantages
- Continuous Freeze Crystallization: Unlike batch processes, our system operates continuously, ensuring stable throughput and consistent product quality. The freeze crystallization process selectively freezes water, leaving concentrated impurities in the liquid phase, which are then removed as solid crystals.
- MVR (Mechanical Vapor Recompression) Technology: The vapor generated during freezing is compressed to a higher temperature and pressure, then used to melt the ice crystals, dramatically reducing energy consumption compared to traditional thermal evaporation. Energy savings can exceed 30-50% versus conventional ZLD systems.
- Zero Liquid Discharge Capability: The system is designed to recover up to 95-99% of the water as high-purity distillate, leaving only a dry solid residue. This eliminates the need for external discharge and helps industries meet stringent environmental regulations.
- Low-Temperature Operation: Operating near 0°C reduces scaling, fouling, and corrosion, extending equipment life and lowering maintenance costs. It is particularly effective for treating brines with high calcium, magnesium, or silica content.
- Modular and Customizable Design: The system is built with modular components, allowing easy capacity scaling from 10 m³/day to over 100 m³/day. Customization options include material selection (SS304, SS316L, duplex), control system upgrades, and integration with existing wastewater infrastructure.
- Intelligent Control System: Equipped with a PLC-based control panel and HMI touchscreen, the system automates the freeze-thaw cycle, monitors key parameters (temperature, pressure, flow), and provides remote monitoring capabilities via Ethernet or wireless modules.
- Environmental and Economic Benefits: By recovering valuable water and reducing waste volume, the system lowers disposal costs, minimizes freshwater intake, and supports corporate sustainability goals. The solid byproduct (mixed salts) can be further processed or responsibly disposed of.
Technical Specifications
| Parameter | Typical Value / Range |
|---|---|
| Processing Capacity | 10 – 100 m³/day (customizable) |
| Energy Consumption | 30 – 80 kWh per m³ of treated water (depending on salinity) |
| Operating Temperature | -5°C to +5°C (freezing chamber) |
| Recovery Rate | 90% – 99% (adjustable per client requirement) |
| Power Supply | 380V / 415V / 480V, 50/60Hz, 3-phase |
| Control System | PLC (Siemens / Mitsubishi) + HMI touchscreen |
| Material of Construction | SS304 / SS316L / Duplex (optional) |
| Dimensions (L×W×H) | Custom fabricated per project |
The above specifications are indicative. Our engineering team can tailor the system to match your feed water characteristics, site constraints, and discharge standards. Please contact us with your specific requirements for a detailed proposal.
Why Choose Qingdao Conqinphi?
As a dedicated manufacturer since 2015, we have supplied environmental equipment to clients across 20+ countries, including North America, Europe, Southeast Asia, and the Middle East. Our factory, covering 10,000-30,000 square meters, is equipped with modern fabrication facilities, testing labs, and a skilled workforce of 201-300 employees. We hold multiple management system certifications, including ISO9001, ISO14000, OHSAS18001, and others (HACCP, SA8000, etc.), ensuring consistent quality and responsible production practices.
Our annual export value exceeds US$10 million, reflecting the trust global customers place in our technology. We provide comprehensive after-sales support, including installation guidance, commissioning, training, and spare parts supply. Every system undergoes rigorous performance testing before shipment to guarantee reliable operation in the field.
Investing in our MVR Continuous Freeze Crystallization System means choosing a proven, energy-efficient path to Zero Liquid Discharge. Reduce your environmental footprint, lower operational costs, and achieve regulatory compliance with confidence. Contact us today to discuss your project and request a customized solution.
Frequently Asked Questions
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What makes freeze crystallization more energy-efficient than traditional evaporation for ZLD?
Freeze crystallization uses the latent heat of fusion (334 kJ/kg) which is about 1/7 of the latent heat of vaporization (2260 kJ/kg). MVR further reduces energy by recycling the compression heat, resulting in 30-50% lower energy consumption compared to multi-effect evaporators or mechanical vapor recompression evaporators. -
Can this system handle high-salinity brines, including those with high scaling potential?
Yes. The low-temperature operation (near 0°C) significantly reduces scaling from calcium, magnesium, and silica compounds. The system is designed to handle TDS up to 250,000 ppm or more, depending on the specific salt composition. Customized pre-treatment options (e.g., softening, antiscalant dosing) are available. -
What is the typical recovery rate of water from the wastewater?
Recovery rates typically range from 90% to 99%, depending on the feed concentration and desired final brine concentration. Higher recovery can be achieved by optimizing the freeze-thaw cycle and incorporating additional stages upon request. -
Is the system continuous or batch? What advantages does continuous operation offer?
Our system is designed for continuous operation, meaning wastewater is fed in, and pure water and solid salts are produced simultaneously without interruption. This ensures stable product quality, higher throughput, and easier integration with upstream processes compared to batch systems. -
What are the maintenance requirements for the MVR freeze crystallization system?
Regular maintenance includes inspecting heat exchanger surfaces for ice buildup, checking compressor and pump seals, and cleaning the crystallization chamber periodically. The system is designed for easy access to key components. Our team provides detailed maintenance manuals and remote support. -
How long does it take to install and commission the system?
Installation time depends on the system size and site conditions. Typically, a standard modular unit can be installed and commissioned within 2-4 weeks after delivery. We provide on-site supervision for the first commissioning to ensure smooth startup. -
What certifications does the system comply with?
Our manufacturing processes are certified under ISO9001, ISO14000, OHSAS18001, and other management standards. The equipment can be designed to meet local electrical and pressure vessel codes (e.g., ASME, PED) upon request. Specific certifications are available depending on the destination market. -
Can you provide a pilot trial or rental system for testing?
Yes, we offer pilot-scale systems (up to 1 m³/day) for on-site testing to validate performance with your actual wastewater. This allows you to evaluate the technology before committing to a full-scale installation. Please contact our sales team for details.
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