Biomass combustion control
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Excess moisture in bagasse or biomass fed to the furnace in stoker boilers, causing blockages in feeding ducts, temperature drop in the furnace and pressure drop in generated steam.
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Bagasse moisture analyzer
This analyzer measures the moisture of the bagasse in the feeding belt, and can be programmed to send alerts to the control room. See more... |
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Biomass stoker boilers, in general, lose an important part of the combustion energy through the following problems: 1) Unburned biomass, 2) low convection heat transfer, 3) high FEGT, (4) unstable furnace pressures and 5) high excess air.
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Over-fire air system
Implementing the well proven, high momentum OFA system designed and patented by JANSEN Boiler, stoker boilers work without any of the problems previously described. See more... |
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High furnace exit gas temperatures (FEGT) are responsible for damages to the superheater and preheater blockages; they also reduce overall combustion efficiency, which implies more desuperheating.
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Furnace exit gas thermometer
Infrared "non-contact" sensor monitors in real time the flue gas temperatures in the boiler or furnace ranging from 250°F to 3,000°F. It can be connected to central boiler control to correlate temperature fluctuations to process adjustments. See more... |
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Visual inspection of combustion at burners (color, flame shape, intermittent firing) through originally installed peepholes or view-ports is very limited and is only performed occasionally. This does not allow continuous monitoring to control flame shape.
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Combustion monitoring camera
Installed cameras can transmit a clear video image to the control room, where observation of the furnace interior may indicate needed adjustments to process variables in order to optimize the combustion at each burner. See more... |
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Lack of measurement results in excess primary air and causes unburned coal, high NOx, superheater damage and overall boiler inefficiency.
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Venturi flowmeter
Venturi flowmeters are highly reliable for large primary air ducts. Each flowmeter can be calibrated by measuring flow in several points throughout its throat section to guarantee accuracy and precision at different flow values. See more... |
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No exact measure of O2 and CO from exit gases can result in inefficient combustion with excess air and unburned coal.
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Inline O2 and CO exit gas analyzers
These analyzers can perform accurate and precise O2 and CO measurements to evaluate the effect of adjustments made to the input of air and fuel to the combustion process. See more... |
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Adjustments in boiler operation must be verified with simultaneous emissions measurements in exit gases.
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Portable exit gas O2 and CO analyzer
Portable O2 and CO analyzers are ideal for measurements in different locations of the exit gas ducts; this is useful in order to verify adjustments in air and fuel fe. See more... |
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Unknown flow and pressure values for primary air affect fuel distribution on the grate and overall combustion.
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Primary air measurement
We perform primary air measurements using portable instruments, or fixed instruments that allow for fine tuning of air flows to the furnace. See more... |
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