Junray ZR-D15 Dioxin Sampling Probe for Stack Emission Monitoring

Overview

The Junray ZR-D15 Dioxin Sampling Probe is a precision-engineered, thermally controlled sampling component designed exclusively for use with the ZR-3720 Dioxin Sampling System in high-temperature, high-particulate industrial stack emission monitoring. It operates on the fundamental principle of isokinetic (parallel pitot tube) sampling—ensuring representative capture of both gaseous-phase and particle-bound dioxin congeners (PCDD/Fs) from flue gas streams under dynamic flow conditions. With an effective sampling length of 1.5 meters and a modular, field-deployable architecture, the ZR-D15 enables compliant sampling at elevated temperatures (typically 120–180 °C) to prevent condensation and analyte loss, critical for maintaining integrity prior to HRGC-HRMS analysis per EPA Method 23, UNI EN 1948, HJ 77.2–2008, and HJ/T 365–2007.

Key Features

• Titanium construction throughout the probe body and interchangeable titanium sampling nozzles—resistant to corrosion, thermal shock, and halogen-induced degradation in aggressive combustion exhaust environments;
• Integrated, PID-controlled heating system maintaining uniform wall temperature across the full 1.5 m active length; temperature stability ±2 °C over extended operation;
• Modular quick-connect interface compatible with ZR-3720 main unit—enabling tool-free assembly/disassembly in under 90 seconds;
• Inert gas-path materials (e.g., quartz fiber filter holder, fluoropolymer-lined internal tubing) minimizing adsorption, catalytic decomposition, or cross-contamination;
• Isokinetic flow tracking via integrated pitot tube and real-time velocity feedback—automatically adjusting pump speed to match stack gas velocity within ±5% tolerance;
• On-board thermal management includes active cooling capability for ambient temperature stabilization during low-exhaust-temperature campaigns;
• Robust mechanical design rated for continuous operation at stack temperatures up to 300 °C and particulate loadings exceeding 50 g/m³.

Sample Compatibility & Compliance

The ZR-D15 supports dual-phase dioxin collection: particulate-bound congener capture on standardized quartz fiber filters (e.g., Pallflex TX40 or equivalent), and gaseous-phase congener retention on polyurethane foam (PUF) and XAD-2 resin cartridges arranged in series. Its geometry and thermal profile are validated for compliance with ISO 1948-1:2021 (Stationary source emissions — Determination of polychlorinated dibenzo-p-dioxins and dibenzofurans — Part 1: Sampling), EPA Method 23 (Determination of Polychlorinated Dibenzo-p-Dioxins and Dibenzofurans from Stationary Sources), and China’s HJ 77.2–2008 and HJ/T 365–2007 technical specifications. The probe meets GLP-aligned documentation requirements for audit-ready chain-of-custody records when used with ZR-3720’s embedded calibration traceability and timestamped event logging.

Software & Data Management

When paired with the ZR-3720 controller, the ZR-D15 leverages an embedded Linux-based operating system featuring a 5.6-inch capacitive touchscreen with intuitive Chinese/English bilingual UI. All sampling parameters—including isokinetic ratio, stack temperature, differential pressure, volumetric flow (corrected to standard conditions: 273.15 K, 101.325 kPa), and cumulative sampled volume—are logged at 1-second intervals and stored internally (≥16 GB eMMC). Data export is supported via USB 2.0 to FAT32-formatted USB drives in CSV and PDF report formats. The system implements secure user access control (password-protected calibration mode), automatic firmware update verification, and optional 21 CFR Part 11-compliant electronic signature and audit trail modules for regulated environmental laboratories.

Applications

• Regulatory compliance testing at hazardous waste incinerators, medical waste treatment facilities, and co-processing cement kilns (per China’s GB 18484 and EU IED Annex VI);
• Post-construction environmental acceptance testing for new thermal treatment infrastructure;
• Periodic stack surveillance and enforcement monitoring by provincial ecological environment bureaus;
• Research-grade emission profiling in pilot-scale pyrolysis, gasification, and biomass combustion studies;
• Method validation and interlaboratory comparison exercises under CNAS accreditation (ISO/IEC 17025).

FAQ

What sampling standards does the ZR-D15 support?

It is engineered to meet HJ/T 365–2007, HJ 77.2–2008, EPA Method 23, and UNI EN 1948 requirements for isokinetic, temperature-controlled dioxin sampling.
Can the ZR-D15 be used without the ZR-3720 sampler?

No—it is a dedicated subsystem requiring the ZR-3720’s power, control logic, flow regulation, and data acquisition capabilities.
What materials contact the sample stream?

Quartz fiber filter medium, titanium sampling nozzle and probe body, fluoropolymer-coated internal surfaces, and inert PUF/XAD-2 sorbent media—no stainless steel or brass in direct gas path.
How is isokinetic accuracy maintained during variable stack flow?

Via real-time pitot tube differential pressure measurement coupled with ABB variable-frequency drive control of the high-vacuum sampling pump, achieving ±5% velocity tracking tolerance.
Is the probe suitable for high-moisture flue gases?

Yes—integrated heated sampling line and filter housing prevent water condensation; optional moisture compensation modes (dry/wet bulb, chilled mirror, manual input) are supported in ZR-3720 firmware.