Continuous Emission Monitoring System (CEMS)
Continuous monitoring of gaseous pollutants, particulate matter and key flue-gas parameters from industrial stacks.
The system integrates extractive gas sampling, gas analysis, particulate measurement, flue-gas parameter monitoring and data acquisition in one coordinated platform. It is designed for boilers, kilns, furnaces and other stationary emission sources.
- Product Introduction
Product overview
The Continuous Emission Monitoring System is designed for automatic online monitoring of industrial flue-gas emissions. A representative sample is extracted from the stack and transferred to the gas analysis unit. At the same time, separate instruments measure particulate matter, oxygen and operating parameters such as temperature, pressure, velocity and moisture.
The data acquisition system combines the monitoring results, displays operating status, stores historical records and prepares data for plant control or authorized reporting systems. The final configuration is selected according to the pollutants, concentration range, stack conditions and local project requirements.
Parameters that can be monitored
- Sulfur dioxide (SO2)
- Nitrogen oxides (NOx); confirm whether the public result is NO, NO2 or calculated NOx
- Oxygen (O2)
- Particulate matter / dust
- Flue-gas temperature, pressure and velocity
- Flue-gas moisture
Measurement principle
The gas sample is collected by extractive sampling and transferred to the conditioning and analysis cabinet. The confirmed material describes ultraviolet absorption and differential optical absorption for SO2 and NOx analysis, electrochemical measurement for oxygen, differential-pressure measurement with a Pitot tube for flow-related parameters, and a resistance-capacitance method for moisture.
Main system components
|
Gas sampling and conditioning |
Sampling probe, heated or protected sample line, filters, pump and conditioning components selected for the flue-gas conditions. |
|
Gaseous pollutant analysis |
SO2, NOx and oxygen measurement modules. |
|
Particulate monitoring |
Stack-mounted or extractive particulate measurement according to the confirmed system configuration. |
|
Flue-gas parameters |
Temperature, pressure, velocity and moisture measurement. |
|
Data acquisition and processing |
Real-time display, historical data, reports, alarms and interfaces to the customer's system. |
|
Calibration and utilities |
Zero/span gas connections, instrument air, power, grounding and related safety accessories. |
Key features
- One coordinated system for gaseous pollutants, particulate matter and flue-gas operating parameters.
- Extractive sampling with filtration and sample conditioning for industrial stack conditions.
- Continuous data display, historical records, reports and alarm information.
- Automatic and manual zero/span calibration functions can be configured for routine quality control.
- Automatic purging and practical maintenance access help reduce blockage and routine service work.
- Modular configuration supports different pollutants, ranges and customer data interfaces.
Technical specifications currently published on the website
|
Item |
Current website value |
|
Cabinet ambient temperature |
5-35 C |
|
Cabinet ambient humidity |
20-90% RH |
|
Flue-gas temperature range |
0-300 C |
|
Flue-gas velocity range |
0-40 m/s |
|
Particulate range |
0-200 mg/m3, optional |
|
SO2 range |
0-200 ppm, optional |
|
NO range |
0-500 ppm, optional |
|
Oxygen range |
0-25% |
|
Moisture range |
0-40% |
|
Compressed-air demand |
250 L/min |
|
Compressed-air pressure |
0.4-0.6 MPa |
Data and communication
The data system displays real-time measurements and equipment status, stores minute, hourly and daily records, and generates reports. Communication with the customer's DCS or reporting platform can be provided according to the confirmed project interface.
Typical applications
- Thermal power plants and industrial boilers
- Steel sintering and steelmaking processes
- Cement kilns
- Waste incineration plants
- Petrochemical heaters and furnaces
- Other stationary industrial emission sources
Installation and maintenance
A project normally requires a representative sampling location, safe access platform, analyzer shelter or cabinet space, power, grounding, clean instrument air, calibration gas connections and suitable cable routes. The final arrangement must follow the actual stack dimensions and site safety rules.
Routine work includes checking filters and sample lines, confirming instrument-air pressure, purging the probe and Pitot tube, reviewing alarms, checking zero/span drift and replacing consumable parts when required.
Physical picture of the factory
Installation drawing
Frequently asked questions
Q: What does a CEMS monitor?
A: A typical system monitors SO2, NOx, oxygen, particulate matter and flue-gas parameters such as temperature, pressure, velocity and moisture. The final list depends on the project.
Q: Is the product limited to one measurement range?
A: No. Ranges are selected according to the expected emission level and reporting requirements. The values published on the current page are reference configurations.
Q: Can the system connect to a plant DCS?
A: Yes, when the required interface and protocol are confirmed during configuration.
Q: How is the system calibrated?
A: Zero and span gas can be introduced manually or automatically. The schedule and acceptance criteria follow the final equipment manual and local project requirements.
Q: What information is needed for a quotation?
A: Provide the pollutants, expected ranges, stack temperature, pressure, moisture, dust level, stack dimensions, sampling location, utilities and required data interface.
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