Sulfur is widely used in fertilizer manufacturing — from sulfuric acid in phosphate plants to ammonium sulfate production — and H₂S (hydrogen sulfide) can be present in multiple process streams. Hydrogen sulfide is toxic, corrosive, and environmentally regulated, making real-time measurement essential. The Blue Dragon Model 800TS is uniquely suited for these applications, providing high-sensitivity total sulfur detection in both gas and liquid phases.
Common Fertilizer Processes Releasing H₂S
- Ammonia & Urea Plants: Acid gas from natural gas reforming may contain H₂S and COS.
- Sulfuric Acid Plants: Trace H₂S may form if feedstock contains impurities.
- Phosphate Fertilizer: Sulfuric acid reactions with phosphate rock may release H₂S through scrubbers or vents.
- Ammonium Sulfate Plants: Waste streams and scrubbing systems may emit H₂S.
Why H₂S Monitoring is Critical
H₂S is dangerous even at low levels. OSHA sets a ceiling limit of 20 ppm. Many plants also face environmental compliance under local air quality or international TRI reporting rules. Monitoring H₂S continuously allows fertilizer facilities to:
- Protect workers and surrounding communities
- Meet emission permit requirements
- Optimize scrubbing and recovery processes
Figure 2: Ammonium sulfate and phosphate plants benefit from real-time sulfur analysis using UV fluorescence.
Why Choose the Model 800TS Analyzer
The Blue Dragon Model 800TS is a total sulfur analyzer using UV fluorescence detection after high-temperature catalytic combustion. It offers a complete solution for fertilizer plants:
- Analyzes both gas and liquid samples using a single unit
- Measures H₂S and all sulfur species by converting them to SO₂
- Supports up to 6 independent sample lines for multi-point monitoring
- Sub-ppb sensitivity up to high ppm levels
- Explosion-proof and IP65 rated for Zone 2 hazardous areas
- Data outputs for compliance (Modbus, OPC, analog) and alarm triggers
Comparison to Traditional Tape Analyzers
| Feature | Model 800TS | Tape Analyzer |
|---|---|---|
| Measures H₂S in liquids? | ✔ Yes | ✘ No |
| Sample types | Gas and Liquid | Gas only |
| Multi-stream capability | ✔ Up to 6 | ✘ Single stream (typically) |
| Detection method | UV Fluorescence (SO₂ from combustion) | Tape colorimetric / chemiluminescent |
| Explosion-proof? | ✔ Ex d IIB T4 rated | Varies |
Supporting Regulatory Compliance
With output formats suitable for DCS, regulatory audits, and real-time safety alerts, the Model 800TS supports reporting for OSHA, EPA (TRI), and local environmental authorities. It ensures sulfur levels stay within safe, permitted limits, and can trigger alarms for immediate mitigation.
Conclusion
Fertilizer plants generate H₂S in many phases of production, from urea and ammonia synthesis to acid gas scrubbing. The Blue Dragon Model 800TS Analyzer is the ideal choice for total sulfur monitoring in gas and liquid streams, delivering precision, flexibility, and safety in one rugged system.
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