An efficient, burning flare does not produce visible smoke, while black smoke is a good indicator of incomplete combustion. Emissions that result from incomplete combustion add CO, CO2, and NOx to the atmosphere. The Global Gas Flaring Reduction (GGFR) organization estimates 150 billion cubic meters of natural gas are flared annually, adding 400 million tons of CO2 emissions.
The increasing environmental regulation demands of the last decade have stimulated the need for flow instrumentation that provides accuracy and repeatability on all emission-related applications. Business and site managers demand cost-effective and reliable solutions in order to balance corporate environmental stewardship with fiscal responsibilities.FLARE GASES
There are several key considerations for effectively monitoring gas flow to the flare. Flow stratification within the pipe can affect reading accuracy based on sensor placement. Upstream blockages and obstructions caused by elbows, curves, valves, or reducers can create flow irregularities (turbulent versus laminar flows) within the pipe. Dirt and particulate buildup in the line can also create flow irregularities and impede flow readings.
Kurz Instruments offers multipoint systems capable of handling uneven flow profiles. Each sensor has an independent microprocessor that provides an accurate reading of the flow in the flow stratification. All Kurz flow meter sensor are virtually unaffected by particulates in the flow stream.
The instrumentation used in flare applications must support large flow ranges. Some of the highest velocities occur during purging or upsets (up to 600 FPS or 183 SMPS), while daily flaring rates can be extremely low (less than a foot per second). The ability to scale the range is an important feature to reduce the uncertainty caused by insufficient signal resolution.
Kurz single-point and multipoint flow meters support a velocity range from 0 to over 36,000 SFPM (183 SMPS). Models include velocity-dependent correction factors, built-in zero-mid-span drift check, and user-configurable digital filtering.
Kurz WGF flow meters are the only thermal flow meters designed to work effectively in the condensing gas applications commonly found in flare line gas flows. Standard thermal flow meters are unable to distinguish liquid droplets from the flow signal, resulting in erroneous high gas flow measurements.
Kurz WGF flow meters remove the errors caused by liquid droplets and provide the correct gas flow measurement. The end result is more predictable gas production, improved system performance, reduced flaring, and accurate emissions reporting to ensure regulatory compliance.