Focuslight CEMS-2000 B S & LGA-4500 Intelligent Flue Gas Continuous Emission Monitoring System (CEMS)

Overview

The Focuslight CEMS-2000 B S and LGA-4500 Intelligent Flue Gas Continuous Emission Monitoring System is an integrated, dual-platform CEMS solution engineered for regulatory compliance and operational transparency in industrial combustion facilities. The system employs extractive sampling with heated sample lines and conditioned gas analysis modules to deliver real-time, high-fidelity measurement of regulated flue gas constituents—including SO₂, NOₓ (NO/NO₂), CO, O₂, CO₂, and particulate matter—across diverse thermal processes. The CEMS-2000 B S serves as the core regulatory-grade analyzer platform, certified to meet Chinese HJ 75–2017 and HJ 76–2017 technical specifications for CEMS performance verification, while the LGA-4500 functions as a complementary high-sensitivity optical gas analyzer utilizing tunable diode laser absorption spectroscopy (TDLAS) for trace species detection and dynamic process monitoring. Together, they form a modular, scalable architecture suitable for coal-fired power plants, waste-to-energy incinerators, cement kilns, and chemical production units subject to national and provincial emission reporting mandates.

Key Features

• Modular dual-analyzer configuration: CEMS-2000 B S (UV-Vis differential optical absorption spectroscopy + electrochemical sensors) and LGA-4500 (TDLAS-based multi-gas detection)
• Heated extractive sampling train with integrated filtration, condensate removal, and pressure/temperature stabilization
• Automatic zero/span calibration with certified reference gases; scheduled calibration validation per HJ 75–2017
• Redundant data acquisition and storage: local embedded controller (Linux-based) + dual-channel RS-485/RS-232 + Ethernet TCP/IP output
• Real-time data logging at configurable intervals (1–60 seconds); 30-day onboard storage capacity with SD card backup
• Self-diagnostic capability including flow rate monitoring, leak detection, optical path integrity checks, and sensor health reporting
• IP65-rated field enclosure with temperature-controlled internal environment (15–35 °C operating range)

Sample Compatibility & Compliance

The system is validated for continuous operation with flue gas streams ranging from 60 °C to 200 °C (with optional high-temp probe up to 300 °C), dust loading ≤ 5 g/m³ (standard), and moisture content up to 15 vol%. It supports sampling from ducts with diameters ≥ 0.8 m and velocities between 3–30 m/s. All analytical modules comply with national emission monitoring standards including HJ 75–2017 (CEMS operational requirements) and HJ 76–2017 (performance evaluation methods). Data integrity protocols align with GLP principles, supporting audit-ready electronic records with time-stamped event logs, user access control, and change history tracking. While not FDA 21 CFR Part 11-certified by default, the system architecture permits integration with third-party validation packages for GMP-aligned environments upon customer specification.

Software & Data Management

The proprietary Focuslight CEMS Manager software provides centralized configuration, remote diagnostics, and regulatory reporting functionality. It generates automated daily summary reports compliant with China’s national pollution source monitoring information platform (SPMIP) data format requirements, including hourly averages, 24-hour rolling means, and exceedance alerts. Raw data export is supported in CSV and XML formats with ISO 8601 timestamping. The software includes role-based user authentication (administrator/operator/auditor tiers), password policy enforcement, and immutable audit trails for all configuration changes, calibration events, and manual overrides. Optional OPC UA server integration enables seamless interoperability with DCS, SCADA, or enterprise-level environmental management systems (EMS).

Applications

• Continuous compliance monitoring for desulfurization (FGD) and denitrification (SCR/SNCR) systems in thermal power plants
• Regulatory-grade emissions reporting from municipal solid waste (MSW) and hazardous waste incinerators
• Process optimization support in cement clinker production and glass melting furnaces
• Multi-pollutant monitoring for VOCs (e.g., benzene, toluene, formaldehyde) via optional LGA-4500 spectral expansion modules
• Heavy metal vapor monitoring (e.g., Hg⁰, AsH₃, Cd) using cold vapor atomic fluorescence (CVAFS) add-on units compatible with the CEMS-2000 B S platform
• Odorant compound profiling (e.g., H₂S, NH₃, mercaptans) for landfill and wastewater treatment facility boundary monitoring

FAQ

What regulatory standards does this system satisfy?
It meets the mandatory technical requirements of HJ 75–2017 and HJ 76–2017 issued by China’s Ministry of Ecology and Environment (MEE), and is designed to support compliance with local environmental protection bureau (EPB) data submission protocols.

Can the system be integrated with existing plant DCS infrastructure?
Yes—via Modbus RTU/TCP, Profibus DP, or OPC UA interfaces; engineering support for protocol mapping and tag database synchronization is available during commissioning.

Is remote access and troubleshooting supported?
The system includes built-in web server functionality and supports secure remote login through SSH or TLS-encrypted HTTP, enabling firmware updates, log retrieval, and real-time parameter adjustment under authenticated access.

What maintenance intervals are recommended?
Preventive maintenance is advised every 90 days, including filter replacement, optical window cleaning, zero/span verification, and pump performance assessment—documented in accordance with HJ 75–2017 Section 7.3.

Are calibration gases traceable to national standards?
All certified reference gases supplied with the system are NIM-traceable (National Institute of Metrology, China) and accompanied by valid certificates of analysis showing uncertainty budgets and expiration dates.