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China Crystallizer V-CT-SF-500: 22 L/h Evaporation, 8 kW Power - Trusted Suppliers & Factory
Vacuum Crystallization Chamber Operation
The crystallization chamber is negative pressure at -95 to -97kPa under vacuum condition, raw material is automatically sucked into chamber under negative pressure. Meanwhile, the heat pump system will makes heat exchange device into evaporation and condensation two parts, the chamber is equipped with a scrapper and jacketed layer, continuous stirring of material and the jacketed surface going on evaporation. The water evaporates into steam and flows up to condensation chambeland becomes distiled water. Distilled water flows to condensation vessel and discharges automatically. solid material will be disacharged automatically by scarpper at last.
Low Temperature Evaporation Technology
Low temperature evaporation technology should be an important means to solve the problem of energy consumption at this stage, it integrates a variety of technologies in a body to strengthen the evaporation conditions so that the evaporation can be completed at a relatively low cost.
Core Principle: In a word, the use of dry air to blow away the water. The solution is heated to a certain temperature, and then passed through the evaporator from top to bottom. The dry air is fully in contact with the solution, reaching a saturated state and becoming wet air flowing out from the top of the tower, thereby increasing the concentration of the solution itself.
System Process Workflow
1. Preheating Stage
This step is automatic. After the original bucket reaches the medium level, the pump runs to produce a vacuum, the evaporator automatically enters the water, and the compressor runs to generate heat to heat the wastewater in the evaporation tank. In the vacuum state, the wastewater temperature rises to about 30 °C, the wastewater begins to evaporate, and the preheating is completed.
2. Evaporation and Concentration
Evaporation temperature is set at 35-40℃. The compressor compresses the refrigerant to produce heat, causing the water to evaporate rapidly. Simultaneously, the refrigerant through the expansion valve after gasification absorbs heat for refrigeration. Vapor rises and liquefies into the storage tank. The refrigerant absorbs heat, and through the compressor compression heating, reheats the waste water. If bubbles rise during the process, sensors detect them and defoamer is automatically added.
3. Concentrate Discharge
After one evaporation cycle is completed, the compression pump stops working, the concentrate pipeline pneumatic valve is opened, the evaporation tank is pressurized, and the concentrate hydraulic pressure is put into the concentrate tank.
Energy Efficiency and Cost Optimization
After understanding the principle of low temperature evaporation technology and equipment conditions, in order to reduce energy consumption and improve heat utilization in the industrial production process to achieve the ideal operating cost requirements, The combination of the previously mentioned multi-effect evaporation technology and mechanical steam recompression technology and vacuum technology has derived the commonly used low-temperature multi-effect evaporation equipment and MVR evaporation equipment at this stage (please check the difference between the two technologies), which greatly reduces the operating cost of tons of evaporation (taking water as an example, generally ranging from 40-70 yuan).
If the operating temperature of the low-temperature evaporation equipment is controlled at 50-60 ° C, the heat utilization efficiency will increase, the same heat source in the case of 80-95 ° C evaporation can obtain more evaporation, while as the heat source of the evaporator can also choose some low-grade industrial waste heat, compared to the use of fresh steam evaporation, on the one hand to achieve multi-level utilization of energy, On the other hand, it achieves the purpose of energy saving and carbon reduction. Even if the energy consumption of the blower and the power consumption of the waste water cycle are calculated, the operating cost of the low-temperature evaporation equipment using a low-grade heat source can be well controlled at 30 yuan/ton of water. In addition, due to the low operating temperature of the equipment, the high-temperature evaporation has great advantages in the selection of processing materials, and even some plastic materials are selected instead of metal to further optimize the processing cost.
If it is not special evaporation requirements, the advantages of low-temperature evaporation technology are unmatched by traditional evaporation technology in terms of production safety, cost input, operating costs, service life, maintenance, equipment footprint, equipment structure, auxiliary equipment, etc.
Frequently Asked Questions
Q: How does the crystallization chamber draw raw materials?
The crystallization chamber maintains a negative pressure under vacuum conditions (-95 to -97kPa), allowing raw materials to be automatically sucked into the chamber.
Q: What is the core principle of the low-temperature evaporation process?
The core principle is heating the solution and running it through the evaporator from top to bottom while dry air comes in full contact with it. The dry air absorbs the moisture to reach saturation, leaving behind a concentrated solution.
Q: At what temperatures does the system preheat and evaporate?
During the automatic preheating stage under vacuum, the wastewater temperature rises to about 30°C. The main evaporation and concentration process is set at a temperature of 35-40°C.
Q: How does combining MVR and low-temperature technologies impact operating costs?
Combining multi-effect evaporation or MVR with vacuum technology significantly reduces operating costs to approximately 40-70 yuan per ton of water. Using low-grade industrial waste heat (50-60°C) can lower this cost to about 30 yuan/ton.
Q: Why does low-temperature operation allow for alternative material selection?
Because the equipment operates at low temperatures, there is less thermal stress, allowing the selection of cost-effective plastic materials instead of expensive metals to optimize overall processing costs.
Q: What are the primary advantages of low-temperature evaporation over traditional methods?
Unless special evaporation requirements are needed, it offers superior performance in terms of production safety, lower cost input and operating expenses, longer service life, easier maintenance, and a smaller equipment footprint.