Continuous steam recompression evaporation system using flash steam waves

Abstract

The invention discloses a continuous steam recompression evaporation system using flash steam waves, belongs to the technical field of hot-method evaporation. Specifically, a flash steam wave pressure booster is introduced, steam recompression is completed by using flash steam waves by using the pressure boosting characteristics of flash steam waves of saturated water with pressure, two combination systems of steam recompression by using flash steam waves and pressure boosting / steam thermal compression of the flash steam waves are achieved, tail-effect secondary steam is fed into a flash steam wave booster and is subjected to recompression, after the energy grade is increased, the tail-effect secondary steam is fed into a primary-effect evaporator to be used as a driving heat source, the generated secondary steam is separated in a gas-liquid separation module, and is further used as a lower-effect heat source for continuous evaporation, and a stock solution is pumped out of the device after being concentrated to be saturated in concentration in the evaporators. By adopting the continuous steam recompression evaporation system, the compression process that gas phase compression of steam is converted to liquid phase compression is achieved, the efficiency is remarkably improved, the difficulty that a steam compressor is hard to design and manufacture is solved, and the pressure boosting efficiency is relatively high when being compared with that of a steam ejector.

Description

technical field [0001] The invention relates to a flash vapor wave vapor recompression continuous evaporation system, which belongs to the technical field of thermal evaporation. Background technique [0002] The arbitrary discharge of high-salt wastewater has brought great pressure to the ecological environment, which has attracted widespread attention from the government and the public, and there is an urgent need for cost-effective high-salt wastewater treatment technology. Among the three mainstream desalination technologies today, the reverse osmosis membrane (RO) method is economical, but has problems such as membrane fouling and low production capacity; The energy consumption of the method is high (for example, the three-effect MED consumes about 0.4 tons of fresh steam / ton of wastewater), and the economy is poor. The industry even believes that the thermal method is not the development direction of the brine treatment technology. However, thermal treatment of saline...

AI Technical Summary

Problems solved by technology

But the biggest problem is that the booster efficiency of the ejector is low, the latent heat of the secondary steam cannot be fully utilized, and the energy saving effect is not significant

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