March 2004Data Acquisition & Telemetry
Financial (Industry)
Williamson has designed and developed the Flare Eye System, which continuously monitors the status of flare combustion, and immediately regulates the flow of steam to suppress smoking conditions. The proven, sophisticated, and unique system automatically ensures smokeless flare burning, and this cuts energy costs through a more efficient use of steam.
In many locations, environmental regulations require 'smokeless flares' to minimise the hazardous emissions. To satisfy these requirements, steam injection systems are typically used to add oxygen to the flame in order to help complete the combustion process, and to eliminate the smoking conditions.
Many of the flare stacks use a simple manual procedure to inject steam into the flare to complete the combustion process. This manual control process can be ineffective, costly and noisy, due to the variability of the burn off gas composition, density and feed rates. To maintain a smokeless flare with manual control, steam has to be run continuously and at excessive rates, in order to properly compensate for peak emission requirements. If there is a flare shutdown, it is not unusual to continue steam injection to protect against future emissions after start-up. This inefficient use of steam can cost millions of rands annually per flare stack.
To more effectively manage hazardous emissions and energy costs, the Flare Eye System is used to continuously monitor the status of the flare combustion and to automatically control the flow of steam to the flare. This non-contact infrared sensor 'sees' the opacity of the dirty, smoky flames, and it 'sees' through the hot clean flames.
This system is able to provide continuous monitoring of the flare emissions, by measuring the flames opacity and only calling for steam when smoke is being generated. This obviously results in a more efficient and reliable method of maintaining an environmentally clean and smokeless flare operation.
In addition to controlling the steam valve, the system includes an adjustable alarm to signal the frequency, time, and duration of any environmental emission problems.
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