Primary Airflow
Primary airflow is used to dry the coal and distribute the coal to the burners on the proper PA (primary air) Curve. Airflow measurements are key to mill efficiency, minimizing thermal NOx, and optimizing combustion. Extreme temperature stratification often found in primary airflow applications - after the tempering and hot air have mixed - can cause inaccurate and non-repeatable measurements for most airflow measurement technologies. Furthermore, some technologies cannot withstand the high temperatures – up to 800°F - often found in these applications. Key challenges in this application include the dynamic temperature and airflow changes caused by the hot and tempering air dampers, limited straight pipe runs, and particulate-laden airflow. Air Monitor offers a highly accurate and reliable primary airflow measurement solution.
Air Monitor Solutions Can Help You...
Eliminate clogged airflow devices
Particulates from coal-fired burners in mill operations can clog differential pressure airflow sensors or coat RTDs in thermal mass systems. Air Monitor’s auto-purge technology in the Combustion Airflow Management System (CAMS) keeps sensing ports clean and ensures accurate measurements.Highly accurate dirty airflow measurement
Airflow measurement devices in coal fired power plants need to handle velocity profile stratification in short duct runs of hot air and tempering air near pulverizers, fan intakes, and barometric dampers. Air Monitor’s Combustion Air (CA) Station provides accurate airflow readings in limited straight duct sections.Optimize Burner Performance
Air Monitor solutions help optimize mill operation and burner performance, reduce emissions, and improve plant efficiency by providing precise and continuous airflow measurement in challenging conditions.-
CEM Systems
Continuous Emissions Monitoring (CEM)
System compliant to meet 40 CFR Part 75 data reporting requirements.
Flow, Temperature, ABS Pressure, Purge, Reporting
- In-stack flow measurement
- Accuracy: 3% of actual flow
- Companion mass flow transmitter
- Automated pneumatic purging
- 40CFR75 Compliant
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AUTO-purge III
Automated Air Purge System
Electro-pneumatic system automates sensing port debris purging for low maintenance dirty airflow measurement.
Companion System
- Add to flow and transmitter pairings
- Automated pneumatic purging
- Field-selectable purging intervals
- Maintains flow system performance
- Trouble-free operation
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AUTO-purge III/CEM
Continuous Emissions Monitoring (CEM) with Purging
Electro-pneumatic system automates sensing port debris purging for low maintenance CEM.
Companion System
- Add to flow and transmitter pairings
- Automated pneumatic purging
- Field-selectable purging intervals
- Maintains flow system performance
- Trouble-free operation
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CA Station
Inline Airflow Measuring Station
Differential pressure Pitot airflow traverse array in rectangular & circular constructions for combustion airflow.
0 to 8,000 FPM
- Accuracy: 2-3% of Actual Flow
- Circular/Rectangular; fabricated to any size
- Temperature: ≤800°F
- Carbon steel, Stainless steel
- Built-in flow conditioning
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CAMS™
Combustion Airflow Management
System designed to monitor combustion airflow and purge debris from sensing ports.
Integrated System
- Accuracy: 0.1%
- Temperature and pressure compensated
- Automated pneumatic purging
- Add to flow measurement pairing
- Trouble-free operation
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MASS-tron II/CEM
Continuous Emissions Monitoring (CEM)
System of mass flow products compliant to meet 40 CFR Part 75 data reporting requirements.
Flow, Temperature, ABS Pressure, Reporting
- Add to flow measurement pairing
- Companion mass flow transmitter
- Flow/Differential Pressure Calculator
- 40CFR75 Compliant
- Fully compensated mass flow
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VOLU-probe/SS
Insertion Airflow Measuring Probes
Stainless steel airflow traverse probe ideal for dirty applications with corrosive, abrasive, and extreme temperatures.
400 to 10,000 FPM
- Accuracy: 2% of Actual Flow
- Temperature: ≤900°F
- Stainless steel, Hastelloy, Inconel, Kynar
- External or Internal mounting
- Easy installation/removal for maintenance
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STACK-probe
Insertion Airflow Measuring Probes
Airflow traverse probe for stack flow monitoring typical for Continuous Emissions Monitoring (CEM) systems.
400 to 10,000 FPM
- Accuracy withing 40CFR75 specs
- Temperature: ≤900°F
- Stainless steel, Hastelloy, Inconel
- 4” or 6” 150lb Flange connections
- Cantilevered construction / installation
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VELTRON DPT-Plus
Multivariable Transmitter
Measures differential pressure and process temperature providing output of calculated mass flow.
Flow, Temperature, or Differential Pressure
- Accuracy: 0.1%
- URL down to 0.05” w.c.
- NEMA 4X
- Class I Div 1, Class II Div 1
- 24VAC, 24VDC
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VELTRON II
Transmitter
Measures differential pressure providing output of differential pressure or volumetric flow.
Flow or Differential Pressure
- Accuracy: 0.1%
- URL down to 0.05” w.c.
- NEMA 1, optional NEMA 4 and 4X
- 24VAC, 24VDC
- Turndown: 100:1
