Flue Gas Monitoring Solutions for Thermal Power Plants | Zetron CEMS from Process Monitoring to End-of-Pipe Emission Compliance

Despite the rapid global development of clean energy, thermal power generation remains a vital pillar of electricity supply in many countries. As environmental regulations around the world become increasingly stringent, thermal power plants are facing higher requirements for continuous flue gas monitoring. Due to the high humidity, high dust content, and significant fluctuations in temperature and pressure of flue gas at power plants, conventional equipment is prone to data drift, pipeline blockages, and measurement distortions, making it difficult to ensure long-term, stable, and compliant monitoring.

Drawing on global field engineering experience, Zetron has developed a customized CEMS solution tailored to the complex operating conditions of thermal power plants. The system, equipped with a dedicated flue gas pretreatment unit, covers the entire process from flue gas purification to emission control. It provides integrated online monitoring and O&M services for gases and particulate matter, helping thermal power plants achieve compliant operations.

I. Key Challenges in Thermal Power Plant Monitoring

High-humidity flue gas is prone to condensation, which corrodes piping and affects detection accuracy

Fluctuations in flue pressure (positive and negative) cause unstable gas sampling in conventional systems

Measurement points are located far apart within the plant, making long-distance sampling prone to insufficient flow rates

Different regions have strict regulatory requirements for data upload and traceability

Zetron Model Selection: The TH1000 CEMS is suitable for high-humidity and moderate dust conditions; choose the TH2000 for high-humidity, and the TH3000 for high-dust environments.

II. Advantages of the TH1000 Continuous Emission Monitoring System（CEMS）

1. Integrated pretreatment ensures data reliability

The system automatically performs dust removal, dehumidification, and pressure and temperature stabilization to eliminate operational interference. It operates fully automatically, providing accurate and traceable data while reducing manual maintenance.

2. Wide operating range, suitable for complex field conditions

Operating temperature ranges from -40°C to +70°C; supports flue gas humidity from 0 to 99% RH; compatible with positive pressure, negative pressure, and vacuum pump sampling. Standard sampling depth is 10 meters; with an optional vacuum pump, it can reach over 70 meters, making it suitable for monitoring points in large power plants.

3. Industrial-grade protection for flexible outdoor deployment

IP65 protection supports outdoor installation; optional explosion-proof and electrically heated piping prevents condensation in the lines. The analyzer supports both built-in and external mounting, making it suitable for both new construction projects and retrofits of existing plants.

4. Multi-protocol output, adaptable to local regulatory requirements

Supports 4-20 mA, RS485, and wireless transmission, integrating with DCS and local environmental protection platforms to enable real-time data upload and storage, meeting compliance standards in multiple countries.

III. Typical Application Scenarios

Inlet and outlet of denitrification units: Evaluate denitrification operational efficiency

Upstream and downstream of dust collectors: Monitor particulate matter and provide early warnings of equipment abnormalities

Inlet and outlet of desulfurization towers: Control and manage desulfurization treatment effectiveness

Flue gas stack outlet: Perform continuous end-of-pipe emission monitoring

Leveraging end-to-end monitoring data from the CEMS, power plants can optimize process operating parameters, reduce O&M costs, and enhance overall environmental treatment efficiency.

IV. Solution Summary

Against the backdrop of the global low-carbon energy transition, stable and accurate online flue gas monitoring is a critical foundation for the compliant operation of thermal power plants.

The Zetron CEMS is optimized to address the challenges faced at thermal power plants—such as high humidity, high dust levels, fluctuating operating conditions, and long-distance sampling. Combining proven hardware with integrated operation and maintenance services, it provides global thermal power plants with a comprehensive solution ranging from process monitoring to end-of-pipe emission compliance, helping the power industry balance reliable power supply with green and sustainable development.