Method for treating high-salt-content wastewater by atomization method

Abstract

The invention relates to a method for treating high-salt-content wastewater by an atomization method.Wastewater to be treated is atomized and sprayed into a cyclone, water mist in rising airflow is refined again, and due to different densities of the water mist and salt, heavier salt gradually falls on the inner wall of the cyclone and then falls on a collecting device below; the water mist continues to rise along with the air flow until entering a multi-stage condensation system, and concentrated saline water with different salt contents, trace saline water and water without salt are condensed and separated stage by stage; the separated concentrated saline water flows back to the raw water tank with high saline water content through a return pipe for next separation; the trace salt-containing water is discharged or recycled according to the discharge standard; and the salt-free water is directly recycled as process water. The atomization evaporation technology is used for treating the high-concentration salt-containing industrial wastewater, so that the energy consumption can be reduced, the treatment efficiency can be improved, and meanwhile, the salt can be directly dried into particles.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to the treatment of high-concentration saline industrial wastewater, in particular to a method for treating high-salt wastewater by atomization. Background technique [0002] High-concentration saline wastewater refers to wastewater with a total saline mass fraction greater than 1%. High-concentration saline industrial wastewater mainly comes from chemical, pharmaceutical, paper, leather, petrochemical, explosives and other industries. Due to its poor biodegradability, high-concentration saline industrial wastewater is a difficult problem in wastewater treatment. At present, the treatment methods of high-concentration saline industrial wastewater mainly include three-effect evaporation method and incineration method. The incineration method has the advantage of high COD removal rate, but the tail gas in the incineration process needs to be treat...

AI Technical Summary

Problems solved by technology

The incineration method has the advantage of high COD removal rate, but the tail gas in the incineration process needs to be treated, which is difficult and expensive

The three-effect evaporation method not only has a complicated process, but also has a large equipment investment cost and high treatment cost. At the same time, the concentrated water and sludge generated in the process need further crystallization or drying treatment.