Yuhong TH-2000PMc Continuous Emissions Monitoring System (CEMS) for Particulate Matter

Overview

The Yuhong TH-2000PMc Continuous Emissions Monitoring System (CEMS) is an industrial-grade, in-situ particulate matter (PM) analyzer engineered for real-time, regulatory-compliant measurement of suspended solids in flue gas streams from stationary combustion sources. It operates on the beta-ray attenuation principle—where a calibrated β-particle source (e.g., ¹⁴C or ⁸⁵Kr) irradiates a continuously advancing filter tape; mass loading of collected PM attenuates the transmitted radiation proportionally to concentration. This method provides direct, gravimetrically traceable quantification without optical assumptions or calibration drift associated with light-scattering techniques. Designed for continuous operation under harsh stack conditions—including temperatures up to 200 °C and relative humidity >90%—the TH-2000PMc integrates heated sampling lines, isokinetic probe control, and temperature-stabilized detection chamber to prevent condensation-induced bias and ensure representative sampling per ISO 16940 and EPA Method PS-11.

Key Features

• Isokinetic sampling control with automatic velocity tracking to maintain proportional sample draw across varying stack velocities.
• Full-path heated transport line (up to 180 °C) and heated filter module to eliminate water vapor condensation and volatile artifact formation.
• Dual-stage cyclone inlet compatibility: field-selectable PM₁₀, PM_2.5, or PM_1.0 fractionation using stainless-steel, NIOSH- and EPA-certified cut points.
• 11 L/min constant-flow sampling pump with integrated mass flow controller and pressure-compensated volumetric correction.
• Embedded 32-bit ARM Cortex-M7 processor enabling autonomous sequence execution, self-diagnostics, and real-time fault logging.
• 7-inch high-brightness TFT-LCD capacitive touchscreen with intuitive GUI supporting multilingual UI (English default), parameter configuration, and local trend visualization.
• Comprehensive data integrity architecture: timestamped raw β-counts, tape position, flow rate, temperature, pressure, and calibration coefficients stored onboard with cyclic overwrite protection.

Sample Compatibility & Compliance

The TH-2000PMc is validated for use in coal-fired power plants, cement kilns, glass melting furnaces, waste incinerators, and other high-temperature industrial processes where particulate emissions must be reported under national or regional air quality regulations. It meets the technical performance specifications outlined in China’s HJ/T 76–2007 “Technical Requirements and Test Methods for Continuous Emission Monitoring Systems for Flue Gas (SO₂, NO_x, Particulate Matter)”, including requirements for zero/span drift, linearity, response time, and interference rejection. Its design aligns with U.S. EPA Performance Specification 11 (PS-11) for PM CEMS, supporting equivalency assessments under cross-border compliance frameworks. All firmware and data handling routines support audit-ready operation in GLP- and GMP-aligned environments, with optional 21 CFR Part 11–compliant electronic signature and audit trail modules available via software update.

Software & Data Management

The system ships with Yuhong CEMS Manager v3.x—a Windows-based configuration, diagnostics, and reporting suite supporting remote commissioning, calibration scheduling, and QA/QC report generation (e.g., daily drift checks, 7-day precision validation). Raw and processed data are exported in CSV and XML formats compliant with China’s national CEMS data transmission protocol (HJ 212–2017). Local storage retains ≥30 days of second-level resolution data; external retrieval is enabled via USB mass storage mode or TCP/IP socket communication over LAN/GPRS. Optional MQTT/OPC UA gateways facilitate integration into enterprise SCADA or environmental information management systems (EIMS). All data files include cryptographic hash signatures to ensure immutability during transfer and archival.

Applications

• Regulatory compliance monitoring at coal-, biomass-, and gas-fired power generation units subject to GB 13223–2011 or provincial emission limits.
• Process optimization and baghouse/fabric filter efficiency verification in cement clinker production lines.
• Real-time opacity correlation and particulate slip detection in float glass furnace exhaust ducts.
• Stack testing support for MACT (Maximum Achievable Control Technology) and NSPS (New Source Performance Standards) applicability determinations.
• Long-term trend analysis for environmental impact assessments (EIA) and annual emissions inventory reporting (e.g., PRTR, GHG Protocol Scope 1).

FAQ

What particulate size fractions can the TH-2000PMc measure?
It supports PM₁₀, PM_2.5, and PM_1.0 measurements through interchangeable, factory-calibrated stainless-steel cyclone inlets meeting ISO 23210 and EPA IO-3.1 specifications.
Does the system require periodic radioactive source licensing?
Yes—users must comply with national radiation safety regulations (e.g., China’s Regulation on Safety Supervision of Radioactive Isotopes); Yuhong provides source documentation, shielding certification, and disposal guidance per IAEA SSG-29.
How is isokinetic sampling maintained during variable stack flow conditions?
The integrated pitot tube array and differential pressure transducer continuously adjust probe suction velocity via closed-loop feedback to match actual stack velocity within ±5% tolerance.
Can the TH-2000PMc operate unattended for extended periods?
Yes—it is rated for continuous 24/7 operation with automatic tape advancement, self-cleaning optics, and battery-backed real-time clock; mean time between failures (MTBF) exceeds 8,000 hours per ANSI/ISA-71.04.
Is third-party certification available for international deployment?
TÜV Rheinland and SGS validation reports per EN 15267-3 and MCERTS are available upon request for EU and UK markets; additional EPA EQM or TÜV approval packages may be commissioned.