As the core unit of the terminal oil-water separator, the corrugated plate assembly has a very flexible application scenario: it can be integrated with the reaction equipment as an integrated device for the pretreatment of oily wastewater in oil fields, petrochemical plants, mines, ports and docks; or it can be installed directly in the on-site pool or tank as an independent unit, mainly suitable for the pretreatment of oily wastewater in coal chemical industry.