Devicefor improving washing quality of cold-rolling strip steel surface

Abstract

The invention discloses a device for improving the washing quality of a cold-rolling strip steel surface. The device comprises an alkali flushing device, an alkali scrubbing device, an electrolysis device, a water scrubbing device, a water rinsing device and a drying device which are sequentially arranged along the operation direction of strip steel. The device is characterized in that a blowing device is arranged between an outlet of a drying roll of the electrolysis device and an inlet of the water scrubbing device. The process comprises the following steps of: alkali flushing, alkali scrubbing, electrolysis, blowing, water scrubbing, water rinsing and drying. According to the device and the process for improving the washing quality of the cold-rolling strip steel surface, the blowing device and step is added between the electrolysis step and the water scrubbing step; compressed air is blown to the electrolyzed cold-rolling strip steel surface by using a nozzle, therefore, the effect of the washing quality of the cold-rolling strip steel surface is further improved, the water purity of a water scrubbing circulating tank and a water rinsing circulating tank is retained for a longer period of time, the discharging cycle is prolonged, the consumption of desalted water is reduced and the effects of energy saving and emission reduction and environment protection are achieved.

Description

technical field [0001] The invention relates to the field of cold-rolled strip steel production. In the continuous degreasing and cleaning process of cold-rolled strip steel, the surface cleaning quality of cold-rolled strip steel is further improved, and the quality stability of coated (plated) processed products of cold-rolled strip steel is improved. Background technique [0002] In the cold-rolled strip coating process, including strip coating, strip galvanizing, color plate coating, silicon steel insulation coating and other coating (plating) layers, cold-rolling plants at home and abroad are processing cold-rolled strips The cleaning process section of the line adopts the following process steps: alkali washing, alkali scrubbing, electrolysis, water scrubbing, water rinsing, and drying, that is, to clean the grease, iron powder, dust and other impurities on the surface of the cold-rolled strip steel, and then After drying, various cold-rolled products (including vario...

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Problems solved by technology

[0003] In the course of practice, the defect of the above process steps is that the edges of the upper and lower surfaces of the strip after the electrolysis step and squeezed dry Residual lye, resulting in poor cleaning quality of the strip surface and waste of desalinated water

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