Acid precipitation treatment system and treatment method

Abstract

The invention discloses an acid precipitation treatment system. The acid precipitation treatment system comprises a plurality of precipitation tanks, wherein a liquid inlet of each precipitation tankis communicated with a liquid intake pipe through a pipeline; a first valve is arranged on the pipeline at each liquid inlet; a liquid intake pipeline is communicated with a waste liquid tank; a pneumatic diaphragm pump is arranged on the liquid intake pipeline; a liquid outlet of each precipitation tank is communicated with a liquid drain pipe through a pipeline; a second valve is arranged on each liquid outlet; each liquid drain pipe is communicated with an acid regeneration system; a slag discharge port of each precipitation tank is communicated with a slag discharge pipeline through a pipeline; a third valve is arranged on each slag discharge port; each slag discharge pipeline is connected with a press filter; a pump body is arranged on each slag discharge pipeline; the first valves, the second valves, the third valves, the pneumatic diaphragm pumps and the pump bodies are electrically connected with a controller. The acid precipitation system has the advantages that the waste acidis precipitated, the internal precipitate is eliminated, the regeneration time is accelerated, and the service life of an ion exchange resin bed is prolonged.

Description

technical field [0001] The invention relates to the field of waste acid treatment, in particular to an acid precipitation treatment system and treatment method. Background technique [0002] In the field of stainless steel processing, pickling is required when cold rolling stainless steel, and hydrochloric acid is generally used to pickle the steel plate to remove silicon. When the steel plate is pickled with hydrochloric acid to remove silicon, the hydrochloric acid is easy to chemically react with the iron oxide on the surface of the plate to form ferrous chloride or ferric chloride, which dissolves in the pickling solution, reducing the concentration. As the pickling process progresses, the concentration of iron ions in the hydrochloric acid solution will continue to increase, and the concentration of hydrochloric acid will decrease accordingly, and finally the pickling hydrochloric acid will no longer be used. Such pickling not only increases the waste of pickling mate...

AI Technical Summary

Problems solved by technology

As the pickling process proceeds, the concentration of iron ions in the hydrochloric acid solution will continue to increase, and the concentration of hydrochloric acid will decrease accordingly, and finally the pickling hydrochloric acid will no longer be used

Such pickling not only increases the waste of pickling materials, but also produces a large amount of waste discharge

[0003] For this kind of discharge, waste acid treatment is

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