SUPERCRITICAL WATER OXIDATION TREATMENT SYSTEM FOR ORGANIC WASTEWATER WITH HIGH SALINITY

摘要

A supercritical water oxidation treatment system for organic wastewater with high salinity uses cold energy of liquid oxygen to cool wastewater with high salinity for crystallization, so as to reduce the mass concentration of inorganic salts in wastewater. In supercritical water conditions, a hydrocyclone (4) is used to remove a large quantity of solid salt particles separating out of the wastewater, thereby effectively preventing a pipeline and a tubular reactor (22) following the hydrocyclone (4) from being blocked. A desalination device is disposed below the hydrocyclone (4) to continuously remove inorganic salts from the system. Further, excess gaseous products, oxygen and CO2, are recycled through a separation and recycling part. A simple subsequent treatment unit (37) is disposed to reduce the reaction time and the reaction temperature of the supercritical water oxidation. A water softening device is disposed, so that the system recycles heat in the form of steam from the high-temperature fluid after the reaction, thereby effectively reducing the operating cost of the system.