M.c. Gill Corporation

John W Schindeler, Jr

Eugene C McGill

James C McGill

Robert L Rawlings

An improved purging process in which purge gas is flowed through a flare system at a sufficient flow rate to minimize or at least acceptably control the rate of back flow of air migration into the exit port of the system. The flow of purge gas is periodically terminated (or reduced) for a predetermined interval of time during which air begins to migrate into the flare system. During this purge gas cessation interval, the flow rate of the flare gas is sensed, and depending upon predetermined flow rate ranges for the flare gas, the purge gas cessation is continued during the cessation interval or a partial purge gas flow is commenced to assure that the total gas flow rate in the system is maintained above a predetermined flow rate. In any event, once the cessation interval of time has lapsed, the full purge gas flow is re-established to assure that air migration is cleared from the system.

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Tulsa, OK, United States of America

John W Schindeler, Jr