Reduction treatment system applied to high-salt-content wastewater of thermal power plant

Abstract

The invention discloses a reduction treatment system applied to high-salt-content wastewater of a thermal power plant. The system comprises a stock solution tank, a preheater, an evaporator, a steam compressor and a hydrocyclone; the liquid outlet end of the stock solution tank is connected with the first liquid inlet end of the preheater; a first liquid outlet end of the preheater is connected with a bottom liquid cavity of the evaporator; liquid stored in the bottom liquid cavity is pumped into a tube pass of the evaporator through a circulating pump; wherein an air inlet end and an air outlet end of the steam compressor are respectively connected with a shell pass of the evaporator, the bottom liquid cavity is connected with a liquid inlet end of the hydrocyclone, and a first liquid outlet end of the hydrocyclone is connected with a liquid inlet end of the circulating pump. In the evaporation and concentration process, although the wastewater is continuously concentrated and reduced, the inner wall of the bottom liquid cavity is not prone to scaling due to the fact that seed crystal balance in the circulating liquid (located in the bottom liquid cavity) is effectively maintained, and the working performance of the evaporator is kept.

Description

technical field [0001] The invention relates to a waste water reduction treatment system, in particular to a waste water reduction treatment system applied to thermal power plants. Background technique [0002] Wastewater from thermal power plants includes domestic sewage and industrial wastewater. The quality of each type of wastewater is different, and the treatment scale is large, difficult, and energy-consuming. With the increasingly stringent national requirements for wastewater discharge standards, "wastewater reduction" and "zero wastewater discharge" will become an irresistible trend. How to effectively treat and reuse wastewater is a common problem faced by thermal power plants. At present, the wastewater treatment systems of most thermal power plants in China can only treat general industrial wastewater and domestic sewage, and have poor treatment effects on high-salt wastewater such as chemical acid-base regeneration high-salt wastewater, fine-treatment regenerati...

AI Technical Summary

Problems solved by technology

At present, the multi-effect evaporation technology and steam mechanical recompression evaporation technology are widely used. The evaporation process consumes a lot of energy, and the equipment is prone to fouling, which seriously affects the performance of the equipment.

Therefore, the treatment of high-salt wastewater from thermal power plants needs to be improved

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