Model-free adaptive control puts Ling-Yuan Iron and Steel in a league of its own. In an iron and steel complex, operating units including blast furnaces, basic oxygen furnaces, and coking ovens all produce gases as by-products. Some plants still discharge these gases into the atmosphere, wasting valuable energy and causing severe air pollution. A gas plant mixes these gases to produce fuel for the furnaces in metal casting and rolling mills. One measures the quality of the mixed gas by its heating value. Gases with inconsistent heating values can cause major control, quality, and production problems due to over- or underheating. Even during normal production, gas supply and demand can change randomly. Major operating units such as blast furnaces and reheating furnaces may go online and off-line periodically causing huge disturbances in gas flow, pressure, and heating value. Online heating value analyzers are available but are seldom used during normal operations because they are difficult to maintain and very expensive. It is desirable to monitor and control the gas-heating value automatically in all operating conditions. Here is what it takes to automatically measure and control the mixed gas-heating value. Here is how model-free adaptive (MFA) control technology enables users to improve production efficiency and yield.
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