TREATMENT SYSTEM FOR TAIL GAS GENERATED DURING ACID-WATER CONVERSION IN COLD ROLLING ACID-WASHING ACID REGENERATION PROCESS

摘要

Provided is a treatment system for tail gas generated during acid-water conversion in cold rolling acid-washing acid regeneration process, which belongs to the technical field of acid regeneration device of cold rolling acid-washing in metallurgy industry. The technical solution comprises: a bypass pipeline is additionally arranged by the side of an acid charge regulating valve (10) of a pre-concentration device, on which a regulating valve (11) is provided. Without being controlled by an acid operation mode or a water operation mode, the regulating valve can be randomly opened or closed, and the regulating valve is opened when the system carries out the conversion in advance and is closed in the normal acid operation mode or rinsing water operation mode. The treatment system carries out acid and water conversion in advance，and directly converts a new water operation into an acid operation, thus it solves the atmosphere pollution problem caused by the iron ions-containing tail gas generated during acid-water conversion during acid regeneration process. During conversion, the waste acid returns to a waste acid pot so as to be saved, thus the acid pollution is avoided; and in addition, because of the acid regeneration process, discharging of the acid-including waste water into the water treatment is reduced, thus water treatment cost is reduced.