Combined membrane treatment process applied to high-salinity industrial wastewater

The invention belongs to the field of industrial wastewater treatment. The invention discloses a combined membrane treatment process applied to high-salinity industrial wastewater. The combined membrane treatment process comprises: carrying out softening treatment on the high-salinity industrial wastewater, and respectively introducing the high-salinity industrial wastewater, which is subjected to the softening treatment, into a high-pressure reverse osmosis device and an electrodialysis device; introducing a concentrated solution which is treated by the high-pressure reverse osmosis device into the electrodialysis device to concentrate; introducing outlet fresh water which is treated by the electrodialysis device into a low-pressure reverse osmosis device, and feeding an outlet concentrated solution to an evaporation system; converging the concentrated solution which is treated by the low-pressure reverse osmosis device with high-salinity industrial wastewater which is subjected to the softening treatment to obtain a mixture, and then introducing the mixture into the electrodialysis device; and taking outlet fresh water of the low-pressure reverse osmosis device and the high-pressure reverse osmosis device as recycled producing water. According to the combined membrane treatment process, flow of the high-salinity industrial wastewater which enters the high-pressure reverse osmosis device and the electrodialysis device is reasonably distributed, and the high-salinity industrial wastewater is separated and concentrated simultaneously; compared with the previous process, the combined membrane treatment process is low in project cost and low in operation cost; and by virtue of low-pressure reverse osmosis, electrodialysis fresh water is separated and recycled, so that the quality of the recycled producing water is improved, and the recovery rate of the recycled producing water is increased.