In one aspect a pilot assembly is disclosed for use with a flare having a first flare stack and a second flare stack, each having discharge ends. The pilot assembly comprises a pilot nozzle assembly, a pilot inlet pipe having a pilot fuel inlet, and a pilot ignition system. The pilot nozzle assembly comprises a connecting member, a pilot nozzle inlet, a first pilot nozzle and a second pilot nozzle. The pilot nozzle assembly can direct a quantity of pilot gas received via the pilot inlet pipe out through the first and second pilot nozzles. The first and second pilot nozzles may both be positioned adjacent the discharge end of either one of the first or second flare stacks. Alternatively, the first pilot nozzle may be positioned adjacent the first flare stack's discharge, and the second pilot nozzle may be positioned adjacent the second flare stack's discharge end.

Gas flares configured to mix and burn multiple gasses are disclosed. According to one aspect, a gas flare head includes a first and second conduit one inside the other to form an interior region between the conduits. The interior region between the conduits is partitioned into multiple channels by a dividing structure. Each channel is configured to route a gas from a source to a mixing chamber where the gasses are mixed and burned.

Described herein are methods and systems for using pyrophoric liquids to ignite combustible gas.

A burner for combusting low pressure gas includes: an outer wall configured as a venturi including a lower end, a mid throat section, and an upper end, the lower end being bell shaped and the upper end further including an upper end inner diameter; and a nozzle configured to receive and deliver a low-pressure gas stream, the nozzle having an opening into the lower end.

The flare gas system has a flare gas assembly having an air pipe with an open upper end, a first conduit in surrounding relationship to the air pipe and having a first conduit open upper end, a second conduit in surrounding relationship to the first conduit and having a second conduit upper end, and a third conduit in surrounding relationship to the second conduit and having a third conduit upper end, the upper ends of the air pipe, the first conduit and the second conduit being below the upper end of the third conduit, there being an air source connected to the air pipe to provide air to the air pipe at a desired flow rate. There is at least one second flare gas assembly operatively connected to the first flare gas assembly, the second flare gas assembly having a tubular housing in which is mounted a spring biased orifice plate, the tubular housing being in open communication with the annulus formed below the second and third conduits.

A fluid flow fitting with a tubular comprising a void therethrough allowing flow of a fluid, a plurality of fins at least partially transverse to the flow of the fluid extending inward from an inner wall of the tubular, and an outlet cap having an outlet hole centered thereon. An ignition source can be placed proximate the outlet cap and/or outlet hole to ignite the combustible fluid. The fins can cause a swirling motion of the combustible fluid, thereby separating contaminants from the combustible fluid and leading to more efficient and clean combustion.

A high turn down ratio flare tip assembly, that allows for both low and high flowrate and pressure flows using a single flare. The flare assembly comprising a nozzle tube connected to the waste stream fuel inlet at one end. The other end of the flare tip assembly providing a seat for a conical structure with flow through orifices/ports that allow the waste stream to flow therethrough during low pressure operation. The conical structure connected to one end of a connecting rod, the connecting rod extending longitudinally downward through the nozzle tube and connected to a spring assembly. The flare tip assembly is designed to allow low flow and pressure to pass through the cone orifices, and during high flow and pressure operation, the cone is unseated from the nozzle tube, allowing the waste stream to flow therethrough. The flare tip assembly also includes a slotted/holed shroud that allows for smokeless combustion of the waste stream during high flow and pressure conditions.

A portable flaring apparatus is disclosed. The flaring apparatus comprises a stack comprising multiple segments of varying diameters, which may be configured to be telescoped for transport. The flaring apparatus further comprises one or more inlets for the intake of gas, an arrester for suppressing flames and detonation within the flaring system, and a plurality of combustion tips for flaring gas. The components of the flaring apparatus may be affixed to a trailer platform for portability.

A flare system including a flare stack and a modular flare unit connected in parallel with the flare stack. The modular flare unit includes a frame, at least two energy conversion modules detachably supported by the frame, a fuel manifold, an air manifold, an exhaust manifold, and an electric generator. Each energy conversion module includes a combustion chamber configured to receive a flow of residue gas through the fuel inlet for combustion in the chamber at (or close to) atmospheric pressure, and a Stirling engine configured to convert heat from the combustion chamber into mechanical energy. The electric generator is connected to generate electric power from the mechanical energy.

Systems and methods for multi-variable flare control include receiving, at a flare controller, a plurality of flare characteristics from a flare monitor. The flare monitor may be an optical flare monitor. The plurality of flare characteristics may include, but are not limited to, Combustion Efficiency (CE), Smoke Index (SI), Flame Stability (FS), Flame Footprint (FF), and Heat Release (HR). The flare controller analyzes a plurality of the flare characteristics and outputs a control signal to control an operating condition of the flare, such as an amount of assist media being fed to the flare. Iterations of the control signal may be bounded by a step value defining a maximum increase or decrease in the control value as compared to the previous control value.