Blast furnace gas, coke oven gas and converter gas mixing control method and system

Abstract

The invention discloses a blast furnace gas, coke oven gas and converter gas mixing control method and a blast furnace gas, coke oven gas and converter gas mixing control system. The blast furnace gas, coke oven gas and converter gas mixing control method comprises the steps of: detecting pressure (main pipe pressure) output by mixed gas; increasing or decreasing an opening degree of a valve on a blast furnace gas branch pipe when detecting that the pressure of the mixed gas increases or decreases; and / or, detecting output flow of the mixed gas, and increasing or decreasing an opening degree of a valve on a converter gas branch pipe when detecting that the flow of the mixed gas increases or decreases; and / or, detecting a combustion value of the mixed gas, and increasing or decreasing an opening degree of a valve on a coke oven gas branch pipe when detecting that the combustion value of the mixed gas increases or decreases. The blast furnace gas, coke oven gas and converter gas mixing control method has the advantages of high automation degree and less manual intervention, and ensures the stabilization of a heat value and pressure of the mixed gas in case of sudden change of user amounts; and the converter gas amount is automatically increased when demand for the gas amount of the users rises, thereby ensuring stable supply of the gas; and the method is simple in operation and control, and greatly emancipates the labor productivity.

Description

technical field [0001] The invention relates to a new method for controlling the gas pressure and calorific value after mixing by PLC in the field of gas mixing station and automatic control in the metallurgical industry. Background technique [0002] The gas mixing station is one of the key places in the energy center of iron and steel enterprises. The quality of the mixed gas output by the gas mixing station directly affects the quality of the products produced by subsequent users. The quality of gas is mainly experienced in the stability of pressure and the stability of calorific value. In addition, the country is now vigorously promoting energy conservation and emission reduction. In addition, the profits of iron and steel enterprises are now declining, and even losses occur. New and higher requirements. At present, the gas mixing stations of most domestic iron and steel enterprises only mix two kinds of gas, but for the increasing demand for mixed gas, the two kinds o...

AI Technical Summary

Problems solved by technology

At present, the gas mixing station realizes this control method mainly through manual real-time intervention, which brings huge labor intensity; when the total flow of users behind the pressurizer changes suddenly, it is also up to the point to manually adjust the opening of each valve. The effect of adjusting the calorific value and pressure of the mixed gas in time is not enough

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