Combustion – Structural installation
Patent
1996-10-04
1998-09-08
Price, Carl D.
Combustion
Structural installation
431264, F23D 1320
Patent
active
058037268
ABSTRACT:
A retractable, electric arc-ignited, gas pilot for igniting flare stacks is comprised of an upper support and guide assembly fixed to the upper end of said flare stack. Two guide cables and a pulley are fixed to the upper support and guide assembly. The two guide cables are fixed to a tension beam. The tension beam and a winch are fixed to a winch foundation plate. The winch foundation plate is fixed near the lower end of the flare stack. A draw cable is fixed to the drum of the winch and the draw cable extends to the pulley and is disposed around the pulley wherein the draw cable is fixed to a pilot carriage assembly. The pilot carriage assembly is guided on the guide cables and is raised by the winch and draw cable and is lowered by gravity. The pilot carriage assembly supports a gas line charged with combustible gas and an ignition system comprised of a coil, a high voltage wire, a spark plug and a thermocouple. During normal operating conditions, the pilot carriage assembly remains at the top of the flare stack. Combustible gas is always flowing through the gas nozzle where it is ignited by a spark plug. An ignition coil is energized by the control system every two (2) seconds, thus creating a spark in the pilot nozzle every two (2) seconds. Therefore, a "Standing Flame" is always present at the pilot nozzle and provides an ignition source for the disposable gases being discharged at the top of the flare. If the "Standing Flame" is extinguished, it is automatically reignited every two (2) seconds.
To perform maintenance on the ignition system or combustion system of the retractable, electric arc-ignited gas pilot system, the pilot carriage assembly is lowered to near the bottom end of the flare stack for easy and safe access.
REFERENCES:
patent: 4147493 (1979-04-01), Straitz, III
patent: 4147498 (1979-04-01), Clarke
patent: 4255120 (1981-03-01), Straitz
patent: 4269583 (1981-05-01), Straitz
patent: 4579522 (1986-04-01), MacDonald
patent: 5291367 (1994-03-01), Rajewski
patent: 5380195 (1995-01-01), Reid et al.
patent: 5429496 (1995-07-01), Stephens et al.
Tornado Flare Systems -Brochure -Arch Light (No Date).
Tornado Flare Systems (No Date).
Price Carl D.
Van Gilder Derek R.
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