Flare gas system

A flare gas system for flaring a plurality of flare gases comprising:

• A) a first flare gas assembly, said first flare gas assembly comprising:
• an air pipe;
• a first conduit in surrounding relationship to said air pipe, a first annulus being formed between said air pipe and said first conduit, there being a first flare gas inlet into said first annulus;
• a second conduit in surrounding relationship to said first conduit, a second annulus being formed between said first conduit and said second conduit, there being a second flare gas inlet into said second annulus;
• a third conduit in surrounding relationship to said second conduit, a third annulus being formed between said second conduit and said third conduit, there being a third flare gas inlet into said third annulus;
• a flow restrictor disposed in said third annulus;
• a flare gas handler forming first and second plenums;
• B) a second flare gas assembly, said second flare gas assembly comprising:
• a tubular housing;
• a pressure operated valve assembly mounted in said housing, said tubular housing being in open communication with said first plenum.

A method of operating a flare gas system, wherein the system comprises:

• A) a first flare gas assembly comprising:
• an air pipe having an open upper end, a first conduit in surrounding relationship to said air pipe and having a first conduit upper end, a first annulus being formed between said air pipe and said first conduit, a second conduit with a second conduit upper end in surrounding relationship to said first conduit, a second annulus being formed between said first and second conduits, and a third conduit with a third conduit upper end in surrounding relationship to said second conduit, a third annulus being formed between said second and third conduits, there being a flow restrictor disposed in said third annulus;
• B) a second flare gas assembly comprising:
• a tubular housing, said housing being in open communication with said third annulus;
• a pressure operated valve assembly mounted in said housing;
• said method comprising:
• introducing a first flare gas into said first annulus;
• introducing a second flare gas into said second annulus;
• introducing a third flare gas into said third annulus;
• introducing combustion air into said air pipe at a constant flow rate;
• mixing said combustion air with said first, second, and third flare gases;
• and
• combusting said mixed combustion air and flare gases.