Primary sulfur treatment adopts PDS sulfur removal technology. After sulfur treatment, the H₂S content was approximately 100–800 mg/Nm³, with high byproduct salt formation and a waste liquid discharge of about 40 m³/d.
| Sulfur content before the tower | Sulfur content after the tower(Before suifur removal process) | Sulfur product ion (t)(Before suifur removal process) | Waste liquid discharge (M3/d)(Before suifur removal process) | Sulfur content after the tower(After suifur removal process) | Sulfur product ion (t)(After suifur removal process) | Waste liquid discharge (M3/d)(After suifur removal process) | |
|---|---|---|---|---|---|---|---|
| H₂S content (mg/m³) | 3000-5000 | 100-800 | ≥50 | 2.2 | About 6.0 | 40 | < 5 |
| Sodium thiosulfate (g/L) | — | about 150 | — | — | about 70 | — | — |
| Sodium thiocyanate (g/L) | — | about 150 | — | — | about 170 | — | — |
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