Deep processing method and device of cold rolling oil-containing wastewater

Abstract

The invention provides a deep processing method and device of cold rolling oil-containing wastewater. The method comprises the following steps: introducing cold rolling oil-containing biochemical effluent into a multi-medium filter; after the effluent goes through a ceramsite filler area and a water granulated slag filler area, introducing the effluent into a medium water pool, then pumping the wastewater in the medium water pool into an ozone catalyst tower through a secondary water feed pump, wherein the ozone catalyst tower is filled with a diatomite catalyst filler, ozone generated by an ozone generator is introduced into the bottom of the ozone catalyst tower and is diffused to the whole ozone catalyst tower through an ozone diffuser, and wastewater is mixed with ozone in the ozone catalyst tower and then catalytically oxidized by the diatomite catalyst; and finally discharging qualified cold rolling oil-containing wastewater. The provided method and system have the advantages that the processing effect is stable, the production and operation cost is low, the operation is convenient, and the automation degree is high. The provided steel green production system is environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an advanced treatment method and device for oily waste water from cold rolling. Background technique [0002] The iron and steel industry is an industry with high energy consumption, high resources, and high pollution. Its water consumption is huge, accounting for about 14% of the national industrial water consumption. [0003] In July 2005, the National Development and Reform Commission issued the "Iron and Steel Industry Development Policy", which put forward higher goals and more specific requirements for the iron and steel industry to develop circular economy, save energy and resources, and take the road of sustainable development. Under these conditions, low energy consumption, low pollution, and low emissions have become the needs of social development. [0004] The cold rolling wastewater mainly comes from the oil depot drainage of various units such a...

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Problems solved by technology

[0007] However, there is no mature advanced treatment process for cold rolling oily wastewater at home and abroad, so this patent proposes a systematic process for advanced treatment of cold rolling oily wastewater, which realizes green treatment of cold rolling wastewater and reduces COD emissions per ton of steel

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