Evaporative crystallization method for high-salinity wastewater

Abstract

The invention relates to the technical field of wastewater evaporation, and discloses a high-salinity wastewater evaporation crystallization method which comprises the following steps: S1, injecting wastewater into a horizontal stirring evaporator, rotating an outer scraper at a low speed, and stirring the wastewater to uniformly heat the wastewater, S2, putting a steel wire ball into an evaporation tank, and circularly rotating the outer scraper at a set angle in a forward and reverse rotation manner, s3, in the step S2, the outer scraper rotates forwards at a low speed, the extrusion fan blades in the outer scraper and the outer scraper rotate reversely coaxially, the steel wire balls extrude between the extrusion fan blades and the outer scraper in a staggered mode and move downwards, and impurity particles in the steel wire balls fall to the lower portion in the extrusion process; the steel wire ball has the characteristics of easy crystal adsorption, elastic deformation capability and scale removal, and the opposite rotation of the high-speed and low-speed inner and outer scrapers is utilized to form an extrusion surface to extrude the steel wire ball, so that broken crystals are continuously generated in the steel wire ball and enter waste liquid, and the dispersed crystals can be used as a crystal growth starting point to accelerate crystal generation and increase the crystal generation speed.

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