Alkali recovery method and device in cleaning section of continuous annealing and/or galvanizing unit

Abstract

The invention provides a continuous annealing and / or galvanizing unit cleaning section alkali liquor recycling method and device. The device comprises a magnetic filtering unit, an alkali liquor collecting unit, an alkali liquor sedimentation purification unit and an alkali liquor storage unit; the filtering unit is provided with a magnetic filtering component, a spraying component and a scraping component; the collecting unit collects alkali liquor or demineralized water sprayed out of the spraying component; the purification unit receives alkali liquor flown out of a first overflow component; the purification unit comprises two or more stages of sedimentation chambers which are arranged in the flowing direction of alkali liquor; the storage unit is communicated with the last stage of sedimentation chamber of the purification unit; the alkali liquor cleanness degree can be improved, strip steel cleaning, brushing and electrolysis quality can be ensured, the maintaining frequency of rollers of the whole line of a continuous annealing unit is reduced, and the non-normal consumption of alkali liquor is reduced; the washing effect is improved, the consumption of demineralized water is reduced, adjustment and operability of a cleaning section circulating system are improved, put and use quality of a PALL ceramic film oil removal system is ensured, and the production requirement of the continuous annealing unit cleaning technology is better met.

Description

technical field [0001] The present invention relates to the technical field of cold-rolled strip technology, in particular, relates to a recovery and utilization device for lye in the cleaning section of the continuous annealing and / or galvanizing unit in the cold-rolled strip technology, and can be used for the recovery of cold The invention relates to a method for recycling the lye in the cleaning section of the continuous annealing and / or galvanizing line in the strip rolling process. Background technique [0002] At present, in the continuous annealing and galvanizing unit of the typical cold-rolled strip process, the cleaning section is one of the core equipment, and the cleaning before annealing is an important link in the production of the continuous annealing unit. The surface state and cleanliness of the strip before annealing have an important influence on the surface quality of the product, the coating quality of the galvanized sheet and the maintenance frequency ...

AI Technical Summary

Problems solved by technology

These will directly affect the commissioning and use quality of the PALL ceramic membrane oil removal system, as well as the cleaning quality of the strip and the maintenance frequency of the entire line of rollers

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