Xact - Model 640i -Multi-Metals Continuous Emissions Monitoring System (CEMS)
Cooper Environmental’s Xact® 640i is the first Multi-Metals Continuous Emissions Monitor to be proven successful for accurately measuring elemental concentrations in smoke stacks by capturing and measuring both particulate and vapor phase metals. The Xact® 640i system uses reel-to-reel filter tape sampling and nondestructive X-ray fluorescence (XRF) analysis to monitor stack hazardous air pollutant (HAP) metal emissions. An isokinetic sub-sample of stack gas goes into the stilling chamber and then drawn through a chemically reactive filter tape. Vapor phase metals, including mercury, are deposited along with particulate-phase metals on the filter tape.In 2007, the US EPA recognized the Xact® CEMS as an outstanding achievement in innovative clean air technology with a clean air excellence Award. In addition, the EPA approved the Xact® 640 as an alternative method for periodic Method 29 testing, feed stream analysis, and monitoring emissions during plant operation.
- Automatic quality assurance, alarms, and control features
- Identification and measurement of 67 elements simultaneously
- Internal calibration check incorporated with every measurement
- Automatic daily, upscale, blank and flow audit
- Sampling, analysis, and near real time reporting every 15, 30, 60, 120, and 240 minutes
- Recognized by EPA as an innovative clean air technology (Clean Air Excellence Award, 2007)
- Proven technology
- Single monitor platform for Hg and Hazardous Air Pollutant metals compliance
- No PM monitor needed to comply with Mercury and Air Toxics Standards
- May be used to meet 40 CFR Part 60 and 63 regulations
- Measures total mercury in µg/dscm
- Saves expenses, time, and resources as compared to Method 29
- Non-destructive analysis allows for sample archiving
- Sensitive and reliable (ng/m3 to µg/m3 range)
The Xact® 640i monitoring system can simultaneously identify and measure multiple metals in flue gas to provide data for use in the following applications.
- Hg CEMS
- HAP metals CEMS
- Benchmark a new process
- Optimization of emission controls
- Permitting
- Regulatory compliance
- Risk management
- Process control
- Corrosion monitoring
- Measurement method: Based on EPA Method IO 3.3: Determination of Metals in Ambient PM Using XRF
- Key applicable elements: Sb, As, Ba, Cd, Ca Cr, Co, Cu, Fe, Pb, Hg, Mn, Ni, Se, Ag, Sn, Ti, Tl, V, Zn, and more available
- Measurement range: Demonstrated from MDL up to 2 mg/m3
- Detection limits: Metal and sample time dependent; See datasheet performance section
- Sampling and analysis times: 15, 30, 60, 120 and 240 minutes
- Calibration stability check frequency: Automatically with each sample analyzed
- Estimated recalibration frequency: Annually, when manufacturer’s operating recommendations are followed
- Linearity: Correlation coefficient >0.99
- Size and weight:
- Base unit: 41”W x 34”D x 81”H, 580 lbs.
- Transport module: 38”W x 24”D x 74”H, 120 pounds
- Power requirements:
- Base unit: 230 VAC @ 14 amps, 115 VAC @ 28 amps
- Transport module: 230 VAC @ 30 amps
- Compressed air: 25 CFM @ 50 psig
- Note: Base unit and air conditioner power can be energized independently; Transport module power depends on length of heated sample lines
- Outputs: ASCII text files, Modbus TCP/IP
- Options:
- Add or subtract elements
- Total or particulate phase elements
- Sample line length
- Probe length
Xact® 640i monitoring system identifies and measures the 67 elements highlighted in the periodic table. Some elements are only available for particulate metals analysis while others are only available for total metals analysis, contact your local representative for more information.
