Off-line cyclic sedimentation tank of alkali wash water

Abstract

The invention provides an off-line cyclic sedimentation tank of alkali wash water. The off-line cyclic sedimentation tank comprises a tank bottom and a tank wall, wherein the tank bottom forms a surface inclining towards the middle part and the lower part, and a sewage draining outlet is formed in the middle part of the tank bottom; specifically, the tank bottom comprises a first part and a second part; the second part is a paraboloid with an upward opening, and the sewage draining outlet is formed in the middle part of the second part; the upper edge part of the first part is connected with the lower edge part of the tank wall, and the lower edge part of the first part is connected with the upper edge part of the second part. The off-line cyclic sedimentation tank of the alkali wash water, provided by the invention, has a cuboid-shaped or cube-shaped tank body which is convenient for field installation, and meanwhile, foreign matters are enabled to be completely drained from the sewage draining outlet due to the paraboloid-shaped tank bottom.

Description

technical field [0001] The invention relates to the field of steel rolling, in particular to an off-line circulation sedimentation tank for alkaline washing liquid which is easy to deposit foreign matter and is used in a continuous line for post-cold rolling treatment. Background technique [0002] The cleaning of the strip surface is an important link in the production of cold-rolled strip steel. The quality of its surface cleaning directly affects the quality of the strip steel. On the one hand, the cleaning is to clean off the oil on the surface of the steel plate, and on the other hand, it is to clean off the dust and residual iron on the surface of the steel plate. (or rust particles), in order to facilitate the surface treatment of the strip. The impurities in the alkaline cleaning solution are mainly the grease brought in from the surface of the steel strip and the metal dust, iron oxide scale particles and other suspended matter bonded together to form a mixture of i...

AI Technical Summary

Problems solved by technology

The disadvantage of this design is that only the nearby foreign matter deposits can be discharged through the sewage outlet 13', and the foreign matter deposits at the tank bottom 11' cannot be completely discharged through the sewage discharge port 13', resulting in a large amount of foreign matter deposits in the sedimentation tank 1' all the time, which cannot be well Complete the recycling of alkaline washing liquid, reduce the cleaning degree of alkaline washing liquid and the cleaning quality of strip steel

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