Laminar cooling temperature control method and system

Abstract

The invention discloses a laminar cooling temperature control method. The method includes: using temperatures of starts and ends of a roughly-cooled segment and a finely-cooled segment of a steel plate as constraint conditions, determining steel plate operation standard speed, the amount of roughly-cooled segment standard valves, and the amount of finely-cooled segment standard valves, meeting the constraint conditions; acquiring actual operation speed of the steel plate, comparing the actual operation speed to steel plate operation standard speed, and adjusting the amounts of roughly-cooled segment and finely-cooled segment valves according to comparison results; acquiring actual initial temperature of the start of the roughly-cooled segment, comparing the actual initial temperature to steel plate initial temperature, and adjusting the amounts of the roughly-cooled segment and finely-cooled segment valves according to comparison results, measuring actual steel plate final temperature of the end of the finely-cooled segment, comparing the actual steel plate final temperature to target final temperature, and adjusting the amounts of the roughly-cooled segment and finely-cooled segment valves according to comparison results. The invention further provides a system that implements the method. The method and the system have the advantages that steel plate cooling can be controlled in real time, intermediate temperature control and cooling rate control are achieved, and the guidance for the laminar cooling process is of good value.

Description

technical field [0001] The invention belongs to the technical field of iron and steel industry control, and in particular relates to a laminar cooling temperature control method and system. Background technique [0002] The iron and steel industry is an important pillar industry supporting the development of the national economy, and the development level of the modern iron and steel industry is an important manifestation of a country's technological progress and comprehensive national strength. For hot-rolled strip steel, its performance depends not only on the hot-rolling process, but also on the controlled cooling technology after rolling. Whether the hot coil temperature can be controlled within the required range mainly depends on the control of the cooling system of the hot strip after the finishing mill. [0003] Usually, the coiling temperature varies with the steel grade. Even if the steel grade is the same, if the contents of trace elements such as carbon are diff...

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Problems solved by technology

According to the characteristics of the input cases, the method of case retrieval, reuse, correction and storage is used to finally obtain the matching set value of the total number of header openings. However, the establishment of the database requires massive data and continuous optimization, and the expert database Retrieval, reuse, and correction processes take a long time, and the response speed is relatively slow, which is not convenient for real-time operations

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