Method for combusting exhaust gas with oxygen feed line

Abstract

The exhaust gases stemming from an oil conveyance such as in a refinery or a chemical factory are flared with oxygen-containing gas fed into the flame, in particular with oxygen-enriched air with a high oxygen content or technically pure oxygen, so as to achieve as soot-free a combustion as possible that also generates less environmentally harmful emissions. The device for combusting exhaust gases is a combination of an exhaust gas pipe, an ignition device and an oxygen line, which is connected with an oxygen tank. The oxygen feed line is used in particular during operational malfunctions instead of a steam feed line or as an additional feed line when not enough steam is generated by the chemical plants.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from German Patent Application DE102014013474.1 filed on Sep. 11, 2014 and European Patent Application EP 14003811.8 filed on Nov. 12, 2014.BACKGROUND OF THE INVENTION[0002]The invention relates to a method for combusting exhaust gases exiting from an exhaust pipe, wherein the exhaust gases are combusted with the formation of a flame at the outlet end of the exhaust pipe, as well as to an exhaust gas combustion device, which encompasses an exhaust pipe with an outlet end for the exhaust gas along as well as an oxygen feed line connected with an oxygen tank and an ignition device.[0003]The combustion of exhaust gases is also referred to as flaring. Flaring is often used at refineries and in the chemical industry to eliminate exhaust gases that arise in particular during startup and shutdown operations and in pressure relief and evacuation equipment. Large quantities of gas can also exit in the event of malf...

AI Technical Summary

Benefits of technology

The invention relates to a method of flaring exhaust gases using an oxygen-containing gas. The oxygen-containing gas is introduced into the exhaust gas to provide enough oxygen for efficient and complete combustion without soot formation. The oxygen-containing gas is preferred to have an oxygen content exceeding 30% or higher to improve the combustion of carbon compounds in the exhaust gas. The oxygen-containing gas is also introduced at a high speed to improve exhaust gas combustion and reduce soot formation. The method is even efficient without supplying steam and reduces the vulnerability of the flaring system to failures.

Problems solved by technology

For example, the exhaust gases arise during a material conversion process or are no longer usable gaseous waste products, e.g., from internal combustion engines or technical incinerators.

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