Flare purge gas means gas introduced between a flare header's water seal and the flare tip to prevent oxygen infiltration (backflow) into the flare tip. For a flare with no water seal, the function of flare purge gas is performed by flare sweep gas.

One of the ways to avoid air ingress into the flare stack, vent KO drum, flare network and subsequent catastrophic consequences, is to continuously purge a small flow rate of hydrocarbon gases.

Nov 15, 2021 · Flare purge gas means gas introduced between a flare header’s water seal and the flare tip to prevent oxygen infiltration (backflow) into the flare tip. For a flare with no water seal, the function of flare purge gas is performed by flare sweep gas.

Flaring is defined as a process of controlled burning of exhaust gases which generates heat and noise. Flaring is a common practice in oil/gas exploration, production and processing operations. A flare system consists of a flare stack and pipes that feed gas to the stack.

Natural gas, fuel gas, inert gas, or nitrogen can be used as purge gas. Figure 13.5-1 is a diagram of a typical steam-assisted elevated smokeless flare system. Complete combustion requires sufficient combustion air and proper mixing of air and waste gas.

What is a Flare System? A Flare System is an arrangement of piping and specialised equipment that collects hydrocarbon releases from relief valves, blowdown valves, pressure control valves and manual vents and disposes of them by combustion at a remote and safe location

Jan 27, 2014 · When a molecular seal is used, purge volume rate should normally be such that to create a velocity of 0.1 ft per sec at the flare tip. In the case of not using a molecular seal the exit velocity is 1 ft per sec.

Oct 1, 2015 · These purge-reduction devices are easily installed inside of the flare tip. The flow of purge gas (offgas) coming through the cone or baffles sweeps away the infiltrating air. This type of seal typically requires a purge rate of between 0.006 m/s and 0.012 m/s.

Purge (or sweep) gas is introduced at a specific flowrate (specified by the flare gas system supplier) at points along the header to prevent air ingress, which could create a flammable or explosive mixture.

Flares allow for the safe, effective disposal of gases and liquids, by acting as relief devices when a plant must quickly dispose of product within its system to prevent overpressurization and potential explosions.