Control method of gas sampling and analyzing system

Abstract

The invention discloses a control method of a gas sampling and analyzing system and belongs to the technical field of online gas analysis of converters. The method comprises the steps of: building a first sampling and analyzing system and a second sampling and analyzing system; setting a first time delay timer, a second time delay timer, a third time delay timer and a fourth time delay timer; and starting the first sampling and analyzing system and the first time delay timer, starting the second sampling and analyzing system, the second time delay timer and the third time delay timer when the first time delay timer reaches a preset value, stopping the first sampling and analyzing system when the second time delay timer reaches a preset value, starting the first sampling and analyzing system, the first time delay timer and the fourth time delay timer when the third time delay timer reaches a preset value, and stopping the second sampling and analyzing system when the fourth time delay timer reaches a preset value. The control method disclosed by the invention has the beneficial effects that failure rate is low, the continuous operating and monitoring of the systems are realized and the safe operation coefficient of a gasometer is improved.

Description

technical field [0001] The invention belongs to the technical field of converter on-line gas analysis, and in particular relates to a control method for a gas sampling and analysis system. Background technique [0002] At present, steel mills at home and abroad are generally equipped with three converters, and adopt three blowing two or three blowing three modes to organize production. The production cycle of each converter is about 40 minutes, and the blowing time is about 14 minutes. The gas analysis system behind the converter fan is controlled by The steelmaking and blowing process, that is to say, the gas analysis process after each converter fan works intermittently. The sampling point of the analysis system in front of the cabinet is designed on the common pipeline from the recovered gas of the three converters to the inlet of the gas cabinet. It cannot be effectively controlled by the steelmaking and blowing process. In order to ensure the safety of the recovery proc...

AI Technical Summary

Problems solved by technology

[0004] 1) Although the process requires the gas analysis system to continuously analyze the oxygen content of the gas in the pipeline, due to the control of the system by the steelmaking process and the non-steelmaking process, the oxygen content analysis will be suspended

[0005] 2) Due to the continuous and uninterrupted work of the gas analysis system, the sampling probe and sampling tube cannot be purged in time, and the mechanical water and condensed water brought into the sampling pipeline cannot be discharged in time. Long-term operation will cause pollution to the sampling analysis system. Lead to blockage, serious water content in the system will lead to inaccurate analysis results, and in severe cases, false high oxygen alarms will cause system chains and gas cabinets will be rejected

[0006] 3) Due to the continuous and uninterrupted work of the gas analysis system, the air pump and other equipment are always in operation, and the equipment is prone to fatigue, resulting in a shorter service life

[0007] 4) Even if there are two sets of sampling systems, when the public equipment behind the valve group fails, it will inevitably lead to the shutdown of the gas analysis system