Excess Air Control For Cracker Furnace Burners

A method for control of the air/fuel ratio of the burner(s) (excess air) of a thermal cracker which includes three steps. The first step is to direct a wavelength modulated beam of near infrared light from a tunable diode laser through combustion gas from the burner to a near infrared light detector...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LIPP CHARLES, TATE JAMES D, REED CHRIS, WEBER ANDY, FREDERICK GERALD D, IRVING SYLVESTER
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMISTRY CRACKING HYDROCARBON OILS DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE FUELS FURNACES HEATING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES KILNS LIGHTING LUBRICANTS MEASURING MECHANICAL ENGINEERING METALLURGY MINERAL WAXES OVENS PEAT PETROLEUM, GAS OR COKE INDUSTRIES PHYSICS PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS REFORMING OF NAPHTHA RETORTS TECHNICAL GASES CONTAINING CARBON MONOXIDE TESTING WEAPONS
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Beschreibung
Zusammenfassung:	A method for control of the air/fuel ratio of the burner(s) (excess air) of a thermal cracker which includes three steps. The first step is to direct a wavelength modulated beam of near infrared light from a tunable diode laser through combustion gas from the burner to a near infrared light detector to generate a detector signal. The second step is to analyze the detector signal for spectroscopic absorption at wavelengths characteristic for an analyte selected from the group consisting of oxygen, carbon monoxide and nitrogen oxide to determine the concentration of the analyte in the combustion gas. The third step is to adjust the air/fuel ratio of the burner(s) (excess air) in response to the concentration of the analyte of the second step.