Coal chemical salt-containing wastewater treatment system and method

The invention relates to a coal chemical salt-containing wastewater treatment system and a treatment method. The coal chemical salt-containing wastewater treatment system comprises a pretreatment unit, a membrane concentration unit, a supercritical water treatment unit and a crystallization and salt separation unit. The treatment method adopts the coal chemical salt-containing wastewater treatmentsystem to effectively treat coal chemical salt-containing wastewater. According to the system and the method provided by the invention, further rapid concentration of the concentrated salt wastewatercan be realized through a supercritical water treatment technology, and organic matters in the concentrated salt wastewater are thoroughly removed, so that not only is enough crystallization drivingforce provided for subsequent crystallization and salt separation, but also the influence of the organic matters is eliminated, and harmless and resourceful treatment of the salt-containing wastewaterin the coal chemical indust