CEMS (Cross stack monitoring)

In-situ CEM systems are often required for compliance with environmental regulations and standards, particularly for facilities with strict emission limits, and are a robust choice for emission monitoring, providing reliable, real-time data while minimizing maintenance and operational costs

In-Situ Continuous Emissions Monitoring System

Flange Mounting: In-situ CEM analyzers are mounted directly to the emissions point on the stack, which eliminates the need for complex and maintenance-heavy sample handling components.

These TDL gas analyzers are used to measure O₂, CO₂, CO, HCl, H₂S, Moisture, Ammonia (NH₃) and Methane (CH₄) in process gas streams.

In-Situ Sample Cell

The sample cell is inserted into the stack where it directly measures the gas composition of the emissions stream. This direct measurement approach minimizes sample transport issues and potential contamination.

Measurement Technologies

• Infra-Red (IR) Analysis: IR analyzers detect gases based on their ability to absorb infrared light at specific wavelengths. This technology is effective for measuring gases such as CO2, CO, and hydrocarbons.
• Ultra Violet (UV) Analysis: UV analyzers measure gases by detecting their absorption of ultraviolet light. This method is commonly used for gases like NOx (nitrogen oxides) and SO2 (sulfur dioxide).

Multi-Component Analysis:

• Simultaneous Monitoring: In-situ CEM systems are capable of measuring multiple gas species at the same time. This multi-component capability allows for comprehensive emission profiling and ensures compliance with various regulatory requirements.
• Water Vapour Measurement: These systems can also measure water vapor content in the emissions. The measurement of water vapor is crucial for reporting pollutant gases on a wet or dry basis, depending on local regulatory requirements.

Reporting Standards:

• Wet vs. Dry Basis: Emission reports can be generated based on either the wet or dry basis of the pollutant gases. This flexibility ensures compliance with environmental regulations that may vary by region or specific emission permit requirements.

Advantages of In-Situ CEM Systems

• Reduced Maintenance: By eliminating the need for sample conditioning and transport systems, in-situ analyzers reduce maintenance needs and associated costs.
• Real-Time Data: Direct measurement in the stack provides real-time data on emissions, which is crucial for operational control and compliance monitoring.
• Enhanced Accuracy: Direct measurement reduces the risk of sample contamination and ensures more accurate readings compared to systems that rely on sample transport.
• Cost-Effective: Lower maintenance and operational costs make in-situ systems a cost-effective choice over the long term, especially in complex or high-maintenance applications.

Applications:

• Regulatory Compliance: In-situ CEM systems are often required for compliance with environmental regulations and standards, particularly for facilities with strict emission limits.
• Process Optimization: Real-time data allows for better process control and optimization, helping facilities reduce emissions and improve efficiency.

In-situ CEM analyzers are a robust choice for emission monitoring, providing reliable, real-time data while minimizing maintenance and operational costs. If you have any specific questions about installing or operating these systems, or need guidance on compliance requirements, let us know.

Process analysers are ideal for a range of applications

Waste-to-energy plants

• Combustion
• Power plants
• Gas turbines
• Biomass
• Glass industry
• Cement plants
• Pulp mills
• DeNOx (SNCR, SCR)
• Boilers & industrial furnaces
• Process control

Why are they used?

Compliance to environmental regulations • Avoid regulatory penalties • Support process control • Optimize combustion to reduce fuel and lower emissions • Increase plant efficiency for extended lifetime of equipment • Decrease operating and maintenance costs of the plant • Improve productivity

Single sided In Situ analysers are also available.

TDL Process Adaptations

In Situ Measurement:

• Direct Integration: TDL spectrometers can be integrated directly into a process gas stream. This setup allows for real-time, continuous monitoring of gas concentrations without needing to remove samples from the process.
  • Advantages: Immediate feedback and high accuracy in monitoring gas composition and concentration, which is crucial for optimizing processes and ensuring safety.
• Extractive Cell:
  • Sampling and Analysis: In this configuration, a sample of the process gas is extracted and then analyzed in a dedicated cell. This method is useful when direct integration is not feasible or when more detailed analysis is required.
  • Advantages: Flexibility in settings and allows for more controlled measurement conditions.

Environment Suitability

• • Fast or Slow Moving Gas Streams: TDL spectroscopy can be adapted for both high-velocity and low-velocity gas streams, making it versatile across different process conditions.
  • Dirty Gas Streams: The technology is capable of handling dirty gas streams, thanks to its design that can mitigate interference from particulates or contaminants.
  • Narrow Pipes: TDL systems can be installed in narrow pipes as small as DN50 (2 inches), making them suitable for compact or constrained spaces.

Folded-Path Spectroscopy

• • Principle: Folded-path TDL spectroscopy involves using a folded optical path within the measurement setup, which increases the effective path length of the laser beam through the gas. This technique enhances the sensitivity of the measurement.
  • No Receiver Alignment Needed: The design allows for accurate measurements without requiring precise alignment of a receiver, simplifying installation and operation.

Benefits of TDL Process Adaptations

• Accuracy: Provides precise and reliable measurements of gas concentrations, crucial for process control and regulatory compliance.
• Real-Time Monitoring: Enables continuous and immediate assessment of gas composition, facilitating rapid response to process changes.
• Versatility: Adaptable to various conditions including fast or slow gas flows, dirty environments, and constrained spaces.
• Reduced Maintenance: Minimal alignment requirements reduce the need for frequent adjustments and maintenance.

Applications

TDL spectroscopy is used in a wide range of industrial applications, including:

• Chemical Processing: Monitoring reactants and by-products in chemical reactions.
• Petrochemical Industry: Ensuring accurate control of combustion processes and emissions.
• Environmental Monitoring: Measuring pollutant levels in emissions to comply with environmental regulations.
• Glass and Cement Industries: Controlling and optimizing combustion processes and monitoring emissions.

Overall, TDL process adaptations offer a robust solution for precise and adaptable gas measurement in diverse industrial environments.

The AQMS GROUP Advanced In-Situ Multi-Gas Measurement System is a cutting-edge, all-in-one compact solution for real-time multigas measurements. Leveraging proven Infrared (IR) analyzer technology, this system is engineered to measure up to 10 gases simultaneously.

Rental Indoor air quality