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Furnace Exit-Gas Temperature (FEGT) Measurement System

TEMPERATURE MEASUREMENT

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Continuously measure Furnace Exit-Gas Temperature (FEGT) using Non-Contact Infrared Sensors to optimize overall performance of boilers and furnaces under varying conditions of coal quality, load, ash fouling, and slagging.

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  • Prevent failures by proactively monitoring the furnace temperature
  • Determine precisely when to perform soot-blowing
  • Set trigger alarms to take quick corrective actions when gas temperatures approach slagging/fouling limits with continuous online monitoring
  • Measure and quantify trade-offs of heat rate and NOx and SO2 emissions
  • Optimize heat transfer by controlling FEGT under varying conditions
  • Prevent unwanted slag accumulation at inlet pendants by controlling FEGT below ash fusion temperatures
  • Reduce down time due to failures by prevention
  • Easily install and maintain while boiler is online.

In many combustion processes, one of the main combustion gases is CO2. Therefore, measuring the CO2 gas temperature is a reliable measurement of the combustion temperature.

Our combustion monitoring solution is a cost effective system that utilizes the IPE 140/45 pyrometer. This is a pyrometer specifically designed for reliable “non-contact” temperature measurement of hot combustion gas containing CO2.

The system is easy to install and maintain even while the boiler is online. It allows for a very quick reaction to undesirable conditions with continuous online monitoring of the combustion temperature.

LumaSense’s FEGT solution includes

  • Infrared Temperature Sensor
  • Protective Sealed Jacket Assembly
  • Protective Cooling Jacket
  • Vortex Air Cooler
  • Removable CaF2 Window Assembly (Window Slide)
  • Air Purge Assembly
  • Extended Site Tube
  • Mounting Flange (Ball Flange)
  • Air Filter for Vortex Air Cooler

Infrared Thermometer 
Temperature Range400 to 2000 ° C (MB 20)
Spectral RangeCO2 absorption band for hot CO2 gas
Uncertainty (Tamb. = 25 °C, ε=1, T90 =1s)Up to 1300 °C: 0.6% of reading in °C Above 1300 °C: 0.8% of reading in °C
Repeatability0.1% of reading in °C + 1 °C
Resolutioninterface and display: 0.1 °C,

analog output:

< 0.03% of temperature range

Analog outputlinear 0 to 20 mA or 4 to 20 mA, DC, switchable; load max. 500 Ohm
Power Supply24 VAC/DC (14 to 30 VAC/DC)

(AC: 48 to 62 Hz)

Power Consumption6 VA
Protective HousingStainless steel enclosure with vortex air cooling (air only required for long-term monitoring)
IP Rating (pyrometer)IP65 (DIN 40 050)
Note: The pyrometer is able to measure hot combustion gas (with typically approx. 10% CO2 ) with a thickness of 40 cm.
System 
Max. Temperature Purge Air75 °C (into cooler)
Max. ambient temperature enclosure90 °C
FEGT System Weightapprox. 6 kg
Air Filtering5 µm filter
Environment 
Ambient temperature0 to 53 °C at pyrometer housing
Storage temperature-20 to 60 °C
Relative humidityNon condensing conditions
Vortex Cooler
Model208-25-HSS
MaterialStainless Steel
Inlet1/4 inch
Cooling Capacity440 Watts
Air Consumption @ 6.9 bar708 slpm / male inlet

LumaSense

LumaSense systems empower our customers to realize immediate, verifiable, and sustainable savings from efficiency gains and waste reduction that go directly to the bottom line. Typical efficiency gains range from a minimum of 1% and up to 4% – even well beyond – opening the door to billions of dollars of savings in readily preventable expenses for our customers in the Global Energy, Industrial Materials, and Advanced Technologies markets. Systems and sensors span thermal imaging, pyrometry, fiberoptic temperature sensors, non-dispersive infrared and photo acoustic spectroscopy, gas-sensing modules, and a range of purpose-built sensors. These are developed, optimized, and tuned for the specific requirements of resource-intensive global industries and all are integrated into a feature-rich and customizable software solution to optimize the insight these sensors can provide and to allow for integration into controls and automation of processes.

Furnace Exit-Gas Temperature (FEGT) Measurement System

 

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Call Us Toll Free Across Canada!

1.888.388.1592

Corporate Headquarters

101-11127 15 Street NE,
Calgary, AB Canada T3K 2M4
1.403.250.1594
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