The CEMS (Continuous Emissions Monitoring System) is used for real-time measurement of pollutant gas emissions from industrial boilers, cogeneration plants, power stations and thermal power plants. CEMS helps to monitor and control compliance with environmental regulations, monitor plant performance and provide data for maintenance planning.
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Up to 14 flue gas components can be measured simultaneously. The CEMS enables continuous monitoring of gas emissions in flue gas from combustion processes based on natural gas, fuel oil, coal or industrial or municipal waste, such as :
The CEMS system consists of one or more high-performance gasanalysers , an oxygen analyser and a sample conditioning unit. They have been specially designed by Fuji Electric France for compliance with the European Directive.
Continuous emission analysis systems Fuji Electric France are QAL1 certified by TÜV to EN 14181, EN ISO 14956 and EN 15267.
Measurable components
The continuous emissions analysis system can measure a multitude of components, including CO, CO₂, NOx, N₂O, SO₂, NH₃, HCl, CH₄, O₂, H₂O, in addition to pressure, temperature, flow rate/speed, and dust content.
Innovative measurement principles
Measurement principles vary depending on the components. For CO, CO₂, NOx, N₂O, SO₂, CH₄, non-dispersive infrared (NDIR) is used. O₂ is measured using zirconia, paramagnetic or electrochemical technology, while NH₃, HCl, H₂O are measured by laser. Dust is quantified by LED optical scattering.
Flow measurement is performed by Microventuri, but other methods can be used as options. Pressure is measured by a capacitive sensor, and temperature measurement is provided by a PT100 probe.
Speed and reliability
Response time is impressive, with less than 200 seconds for NDIR technologies and less than 5 seconds for the laser. This guarantees rapid detection of changes in the atmosphere.
Intuitive user interface
Equipped with a 10″ touchscreen, the system uses the Fuji CEMS Manager v7 software module, offering an intuitive user interface for monitoring and managing data.
Advanced Connectivity and Extended Options
The system features standard Modbus® TCP/IP connectivity, with options such as 4-20 mA, Profibus, Modbus® RTU, Internet/GSM (FBOX). Outputs and contact inputs allow extensive customization of alarms and functions.
Advanced features
Options include automatic calibration, automatic blowback, and automatic QAL3 in combination with the Fuji ACE DataQAL3 software module. The system can also multisample up to 8 stacks, offering remarkable flexibility.
Complete Sampling System
The sampling system includes a sampling probe, heated line, filters, coolers and pumps tailored to the customer's application, ensuring accurate, reliable measurements under a wide range of conditions.
Calibration Gas
Calibration gases, supplied locally, are carefully selected. Zero calibration uses clean, dry nitrogen or air, while scale calibration involves a mixture of 90% of each measured component in N₂. For zirconium oxide, specific mixtures of O₂ in N₂ are used.
Versatile power supply
Fuji's CEMS is compatible with 100, 110, 115, 200 or 230 Vac, 50/60 Hz power supplies, guaranteeing adaptability to different electrical configurations.
Reliability and Compliance Made Easy
With dimensions suitable for indoor installation, the system cabinet measures 600 (W) x 800 (D) x 1800 (H). The complete sampling system, including sampling probes, heated lines, filters, coolers and pumps, guarantees consistent reliability and compliance.
Advanced Technology for Precise Measurement
The Fuji Electric CEMS works with twoanalysers models: the ZRE gasanalyser with single-beam NDIR and the ZKJ gasanalyser with double-beam NDIR. Both gas analysers cover a wide range of gases and parameters.
ZRE gasanalyser measurement scales include :
For the ZKJanalyser , the measurement scales are :
For the other measurement scales, both analysers offer the same performance:
Exceptional performance and assured precision
Exceptional repeatability is maintained at ≤ ± 0.5% FS for NDIR and ZrO2, and ≤ ± 1% FS for the laser.
Linearity remains consistently ≤ ± 1% FS, guaranteeing reliable and accurate measurements.
As far as zero drift is concerned, this depends on theanalyser chosen.
For the ZREanalyser , it is limited to ≤ ± 2% PE per week for NDIR, ≤ ± 2% PE per month (ZrO₂) and ≤ ± 1% PE per week for laser.
For the ZKJanalyser , scale drift remains below ≤ ± 1% PE per week for NDIR, ≤ ± 2% PE per month ZrO₂ and ≤ ± 2% PE every 6 months for the laser.
Reliability and Durability
Performance stability is maintained with a scale drift of ≤ ± 2% PE per week (NDIR), at ≤ ± 2% PE per month (ZrO₂) and at ≤ ± 2% PE every 6 months (laser) for both analysers.
