Control your Secondary Air Flow and OFA flows to the highest accuracy levels using a digital air flow sensor

Enhance your efficiency, lower your heat rate and your NOx emissions through precise digital flow sensor technology

Digital and accurate air flow measurement for your boiler using advanced digital air flow sensor solutions

Exact measurement of SA and OFA flows: the whole combustion in your boiler is depending on the correct distribution of SA and OFA flows on a burner by burner and row by row basis. Large imbalances of air flows to the boiler are common and due to insufficient analogue measurement technology. Switch over to digital air flow sensor solutions by PROMECON in order to have the same exact air flow to each burner, windbox or OFA nozzle, ensuring stable secondary air flow.

Better flame control: the exact digital measurement provided by a digital flow sensor will enhance the flame control of each burner. Flame attachment will be enhanced, flame impingement on the boiler wall be reduced. The right amount of SA and OFA flow achieved through accurate Secondary Air Flow control will also be important for the overall gas and heat distribution downstream the furnace section in the super- and reheaters.

One measurement for life: recalibration as well as adjustments or cleaning of the sensors will be a thing of the past. PROMECON´s digital air flow sensor never needs readjustment or recalibration over the entire life of the measurement system, making it ideal for long-term Secondary Air Flow monitoring.

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How Air flow influences your combustion performance

Low NOx coal combustion - unthinkable without exact air flow: PROMECON´s digital flow sensor ensures that on the burner nozzle as well as in a complete burner row the right amount of oxidation air is present through precise secondary air flow distribution. By this the overall O2 level can be reduced, hence reducing NOx. PROMECON´s SA flow helps to keep unburned carbon low and protects the boiler wall even at low stoichiometries.

OFA effectiveness: OFA systems only work if the air distribution between SA and OFA is correct. The digital air flow sensor measurement will guarantee that this is always the case, making OFA systems reliable and effective by maintaining stable secondary air flow.

Keep your boiler wall safe: by use of PROMECON´s McON air system equipped with a digital flow sensor, uneven distribution of Oxygen in the boiler can safely be prevented. The combustion will be more uniform and no pockets of high CO or other anomalies will be present in your boiler due to controlled secondary air flow.

Products for Secondary Air Application

McON Air Compact

McON Air Portable

McON Air SIL

McON Air Temp

How accurate air flow measurement impacts your boiler efficiency

Digital and accurate measurement using a digital air flow sensor means less headache: from the operators via the maintenance up to the management of the boiler there will be a lower load of concern and work in order to keep the combustion up to the expected performance levels with reliable secondary air flow control.

Lower Maintenance cost: the sheer amount of impulse line cleaning and recalibration can vastly be reduced. McON air does not have any impulse lines. Its measurement is purely based on time measurement using a digital flow sensor. Man power levels as well as down times of the measurement will vastly be reduced using PROMECON technology for secondary air flow.

Reduce boiler operating cost by reducing process noise: the old analogue measurement technology results in swinging dampers and fans. Go digital with a digital air flow sensor and eliminate any drift out of your measurement, leading to tighter fan control and optimized secondary air flow at all times, reducing maintenance and electricity consumption.

Key features:

1. Digital flow measurement: the McON air works as a digital flow sensor, measuring only the time of flight of the gas. The measurement is 100% drift free and does not need cleaning, zero of span adjustment, nor recalibration – ideal for secondary air flow measurement.

2. Vector flow measurement: unlike all other commonly used measurement devices for air flow in ducting, McON air equipped with a digital air flow sensor measures velocity as a vector in the orientation of the duct direction, ensuring accurate secondary air flow measurement independent of swirl or lateral flow.

3. Easy installation: McON air sensors do not need any impulse lines. They can easily be integrated into the existing duct configuration. Existing plants can easily be equipped with a digital flow sensor solution for reliable secondary air flow measurement.

4. High turndown ratio: The measurement curve of McON air using a digital air flow sensor is strictly linear. High turndown ratios can be achieved, allowing reliable secondary air flow measurement even at low loads.

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Primary Air
- Application: Measure the exact amount of primary air into your pulverizer using accurate airflow measurement.
- Benefits: Have better control over coal bed depth, particle size as well as correct transport conditions of the solid fuel to the burners, directly improving coal fired power plant efficiency. Have better control over flame attachment and NOx formation supported by modern power plant instrumentation..
Secondary Air Flow
- Application: measure the combustion air flow to your windbox or your individual burners and OFA ports with reliable airflow measurement.
- Benefits: Have an exact secondary air distribution to all burners and OFA ports at all times without any drift. Avoid NOx formation, CO formation, flame impingement. Reduce hot spots in your boiler as well as slagging, contributing to higher coal fired power plant efficiency. Allow much better O2 trimming and reduce boiler losses and heat rate using advanced power plant instrumentation.
Air Flow/Flue Gas
- Application: Measure flue gas flow out of your boiler directly and drift free as part of comprehensive power plant instrumentation.
- Benefits: Measure the exact amount of boiler gas flow. Detect imbalances of flue gas flow between ID fans using accurate airflow measurement. Optimize air heater, ID fan and scrubber performance to enhance coal fired power plant efficiency.
Unburned Carbon
- Application: Measure your unburned carbon in the fly ash in real time as part of advanced power plant instrumentation.
- Benefits: Optimize your combustion efficiency by active O2 and UBC monitoring directly improving coal fired power plant efficiency. Enhance your air staging in the boiler using the UBC information in the fly ash. Optimize your fly ash sorting process by the online detection of quality ash and rejection ash supported by reliable airflow measurement.