Calcium Chloride Evaporation & Concentration Equipment
Core Equipment Overview
This specialized evaporation system is engineered for concentrating calcium chloride solutions, addressing key challenges such as high solubility, significant boiling point elevation, and strong corrosivity. It offers flexible configurations including MVR, triple-effect, and single-effect evaporation processes, tailored to different concentration stages. The system achieves automatic control of temperature, pressure, and material transfer, ensuring stable production of high-concentration calcium chloride solutions (up to ≥70%) for subsequent crystallization or drying processes. Widely applied in chemical, environmental protection, and refrigeration industries, it balances efficiency, energy savings, and corrosion resistance.
Applicable Raw Material Range
|
Raw Material Type |
Concentration Range |
Recommended Evaporation Process |
Target Output Concentration |
| Dilute Calcium Chloride Solution | 20%-35% (20-40 Baume degrees) | MVR Evaporator | 40%-50% |
| Medium-Concentration Solution | 35%-40% | Triple-Effect Evaporator | 60%-65% |
| High-Concentration Feed | 40%-60% | Single-Effect Evaporator | ≥70% |
| Calcium Chloride-Containing Wastewater | 15%-30% | Combined MVR + Crystallization System | Solid Salt Recovery |
Equipment Working Principle
The system operates based on vacuum evaporation + heat energy cascade utilization technology, with different configurations optimized for specific concentration ranges:
● MVR Evaporator: Uses a mechanical vapor recompression compressor to compress low-pressure secondary steam into high-pressure steam, which is then reused as a heating source. This reduces external steam consumption by over 90% compared to traditional systems.
● Triple-Effect Evaporator: Adopts a series connection of three evaporation units. Steam from the first effect heats the second effect, and secondary steam from the second effect heats the third effect, achieving heat energy utilization with a thermal efficiency of over 80%.
● Single-Effect Evaporator: Designed for high-concentration solutions, it uses direct steam or heat-conducting oil heating under vacuum conditions to minimize scaling and ensure stable evaporation of high-boiling-point solutions.
Refined Working Procedures
4.1 MVR Evaporation Process (for 20%-35% Concentration)
|
Step No. |
Operation Link |
Process Parameters |
Core Function |
| 1 | Raw Material Preheating | Temperature raised to 70-80℃ using condensed water heat | Reduce heating load and energy consumption |
| 2 | Forced Circulation Evaporation | Vacuum degree -0.08MPa, evaporation temperature 85℃ | Concentrate solution to 40%-50% |
| 3 | Vapor Recompression | Compressor pressure ratio 1.8-2.2, steam temperature 110℃ | Reuse secondary steam as heating source |
| 4 | Condensate Recovery | Condensed water temperature ≥90℃, reused for preheating | Maximize heat energy recovery |
| 5 | Concentrated Solution Discharge | Stable concentration monitoring, automatic discharge | Ensure consistent product quality |
4.2 Triple-Effect Evaporation Process (for 35%-40% Concentration)
|
Step No. |
Operation Link |
Process Parameters |
Core Function |
| 1 | Material Feed to Third Effect | Vacuum degree -0.09MPa, temperature 65℃ | Initial concentration using low-grade heat |
| 2 | Sequential Transfer to Second/First Effects | Vacuum degree -0.08MPa (second effect), -0.06MPa (first effect) | Gradual concentration through cascade heat utilization |
| 3 | External Steam Heating (First Effect) | Steam pressure 0.2MPa, temperature 120℃ | Provide primary heat source for the system |
| 4 | Secondary Steam Cascade Utilization | First effect → second effect → third effect | Reduce overall steam consumption by 65% |
| 5 | Concentration to 60%-65% | Automatic density monitoring and discharge | Prepare for final single-effect concentration |
Core Advantages of Equipment
|
Advantage Category |
Specific Performance |
| Strong Raw Material Adaptability | Configurable processes for different concentration ranges (20%-60%), compatible with calcium chloride solutions and wastewater |
| High Production Efficiency | MVR system achieves 4t/h evaporation capacity; triple-effect system supports 10-50t/h continuous operation with automatic control reducing manual intervention |
| Controllable Energy Consumption | MVR evaporator consumes only 0.12t steam per ton of water evaporation; triple-effect system reduces energy use by 65% compared to single-effect systems |
| Up-to-standard Product Purity | Forced circulation design and precision filtration remove impurities; concentrated solution purity ≥99.5% meets industrial-grade requirements |