The invention discloses an intensified deep concentration
system for high-salt-content industrial
wastewater and a technology thereof and belongs to the field of
water treatment. The high-salt-content industrial
wastewater is adjusted through an adjusting tank, settled through a
softening settling pond, filtered through a V-type filter tank, filtered through an
ultrafiltration device in an intensified mode and concentrated through a first-stage
reverse osmosis device, then the
hardness is removed through an
ion exchange resin device, and salt separation is performed through a
nanofiltration device; thick water of the
nanofiltration device is concentrated through a frequent
electrode transfer
electrodialysis device,
produced water is oxidized through an advanced oxidization device and then enters a general
produced water tank, and thick water is crystallized through a freezing
crystallization system and crystallized with
sodium sulfate;
produced water of the
nanofiltration device is concentrated through a second-stage
reverse osmosis device and concentrated again through the frequent
electrode transfer
electrodialysis device, produced water is oxidized through the advanced oxidization device and enters the general produced water tank, and thick water is crystallized through an MVR evaporative
crystallization device and crystallized with
sodium chloride. The intensified deep concentration
system has the advantages that potential safety hazards caused by high-pressure operation are effectively reduced; the problem that the COD content is high after thick
salt water is highly concentrated is effectively solved, the purity of crystallized salt is improved, and the using value of the crystallized salt is improved; the system is high in
automation degree, easy to operate, low in operation pressure, stable in operation, high in purity of the crystallized salt, low in operation cost and the like.