Pickling solution performance online detection system and method

Abstract

The invention discloses a pickling solution performance online detection system which comprises a filter, an infusion pump, a solution storage tank, an upper return pipe, a liquid level meter, a thermometer, a densimeter, a conductivity meter, an automatic valve, a lower return pipe and an acid concentration analysis system; an inlet pipeline is arranged between the solution storage tank and an acid tank, the infusion pump is arranged in the inlet pipeline, the filter is arranged at the inlet of the infusion pump; the lower part of the solution storage tank is connected to the acid tank by thelower return pipe, and the lower return pipe is provided with the automatic valve; the upper part of the solution storage tank is connected with the acid tank by the upper return pipe; and the solution storage tank is provided with the liquid level meter, the thermometer, the densimeter and the conductivity meter connected to the acid concentration analysis system. The system and the method can be used for detecting acid concentration and iron ion concentration in hydrochloric acid, sulfuric acid and nitric acid pickling solutions; the system has the characteristics that the test precision ishigh, and the predicated acid concentration and iron ion concentration in the pickling solutions approach to the actually measured values; and the system is connected with a pickling solution controlsystem to realize automatic acid feeding and acid discharge of the pickling line.

Description

technical field [0001] The invention relates to the field of metallurgical equipment, in particular to an on-line detection system and method for pickling liquid performance. Background technique [0002] Pickling is an important link in the production process of cold-rolled sheet, and its purpose is to remove the scale on the surface of hot-rolled sheet. The pickling process is a process of chemical and electrochemical interactions, including the dissolution of scale by acid, the scale-breaking effect of hydrogen, and the reduction of hydrogen atoms. The factors that affect the pickling speed and efficiency are: the condition of the scale on the surface of the hot-rolled plate (including the composition of the scale of different steel types, the thickness of the scale formed by different coiling conditions), the scale breaking process parameters (elongation and insertion amount) ), and pickling process parameters (hydrochloric acid concentration, temperature, flow conditio...

AI Technical Summary

Problems solved by technology

This mode of operation has a slow response speed, resulting in very unstable process control of the pickling solution, which cannot meet the needs of high-quality pickling plate production

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