ACID CONCENTRATION CONTROL METHOD AND DEVICE FOR COLD ROLLING PICKLING PRODUCTION LINE

摘要

Provided are a method and an apparatus for controlling an acid concentration for pickling in cold rolling. The method comprises arranging three mutually communicated acid adding tanks on an acid circulation vat, feeding back to a multi-variable controller through acid concentration analyzers actual acid concentration values of an acid solution in the acid vat obtained after measurement, and using a multi-variable controller model to find out a coupling relationship among the acid concentrations of three measurement points. The control method and apparatus can implement acid concentration closed-loop control, save hydrochloric acid usage, reduce the amount of regenerated waste acid, and reduce environmental pollution.