1. Mechanical vapor recompression evaporation

MVR evaporation process, mechanical vapor recompression, also known as mechanical thermal compression, is a method that uses a mechanical compressor to compress all the secondary vapor generated by the evaporator.

MVR evaporation technology improves thermal efficiency, reduces the demand for external heat sources, and reduces energy consumption, with small floor space and few public facilities.

2. Multi-effect evaporation

The multi-effect evaporation process is to connect several evaporators to operate, and the secondary steam generated by the former evaporator is used as the heat source of the latter evaporator to improve the heat energy utilization efficiency. The advantages of multi-effect evaporation are simple pretreatment of influent and flexible application, which can be used alone or in combination with other evaporation processes, and the system operation is safe and reliable.

3. Falling film mechanical vapor recompression cycle evaporation

Falling film mechanical vapor recompression cycle evaporation technology is one of the common methods to treat high-salinity wastewater at present. This evaporator adopts falling film evaporation, and on the basis of mechanical vapor recompression evaporation, a liquid recirculation pump is added to forcibly circulate the feed liquid.

4. Thermal steam recompression evaporation

Thermal steam recompression evaporation refers to a TVR evaporator. According to the principle of heat pump, raw steam passes through a steam jet heat pump to generate a relatively negative pressure environment, and part of the secondary steam from the primary heating chamber is sucked, mixed and pressurized, and then the temperature is raised as primary heating steam.

This method is simple and effective in design, and can ensure high reliability of operation.

Extended information:

Hazards of high salinity wastewater:

Organic wastewater with high salinity mostly contains salt substances such as Cl-, SO42-, Na+ and Ca2+. Although these ions are essential nutrients for microbial growth, they play an important role in promoting enzyme reaction, maintaining membrane balance and regulating osmotic pressure during microbial growth.

However, if the concentration of these ions is too high, it will have inhibitory and toxic effects on microorganisms, which are mainly manifested as: high salt concentration, high osmotic pressure and dehydration of microbial cells lead to cell protoplasm separation; Salting-out reduced dehydrogenase activity; High chloride ion is toxic to bacteria; When the salt concentration is high, the density of wastewater increases, and the activated sludge is easy to float and lose, which seriously affects the purification effect of biological treatment system.

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