Industrial processes with furnaces, boilers, ovens, dryers, and other assets requiring combustion controls look to improve efficiency to reduce costs and lower emissions. One example is implementing a burner control strategy with pulse firing, which can reduce fuel consumption, improve temperature uniformity within the combustion chamber, lower nitrogen oxides (NOx) emissions, and achieve a better, more efficient Turndown Ratio.
Instead of the traditional heat-modulating control strategies, burners in a pulse firing system are not fired constantly. Instead, they are “pulsed” repeatedly in an ON/OFF or high-fire/ low-fire cycle. For example, the burners can fire at a high level for a specific timeframe and then cycle to a lower level — or turn off entirely — depending on the application’s needs.
Rugged and reliable valves used in the fuel train are essential to successfully applying this burner control strategy. This quick 51-second video, How to Properly Maintain Your Fuel Train, shows some effective safety shutoff valves for the application. These valves include the ASCO Series 158/159 and 214 safety shutoff valves.
In addition to pulsing the burners through high-fire/low-fire cycles, pulsing systems can switch the burner from a high-fire position to the OFF position. To regulate the heat, the controller needs to change the duty cycle by changing the time between the pulses — i.e., pulse faster or slower — or by changing the length of time the burner is ON for each pulse.
Watch the video and visit the Industrial Burner Solutions section on Emerson.com for a whitepaper and more information on ways to drive fuel efficiency and emissions performance improvements.
The post Improving Fuel Train Flow, Reliability and Safety appeared first on the Emerson Automation Experts blog.
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