System for controlling the composition of a fuel gas produced by a jet compressor system

摘要

A method of providing a mixture of lean and rich gas of a desired composition by means of a jet compressor system comprising two or more jet compressors comprising: (1) adjusting the jet compressor system being used to mix the lean and rich gas to provide a leaner gas mixture than the desired composition; (2) then adding a predetermined amount of rich gas to the leaner gas mixture to attempt to obtain the desired composition; and (3) varying the amount of rich gas added to the leaner gas in response to the measurement of gas properties in the jet compressor system to thereby more nearly obtain a gas of the desired composition. Preferably the lean gas comprises air, blast furnace gas, or BOF gas, and the rich gas comprises methane, natural gas, propane, or butane.