Acid & Alkali Waste Gas Solution Cases
Proven acid mist and corrosive gas scrubbing solutions for pharmaceutical, metallurgical, and chemical industries.
Explore our completed acid and alkali waste gas treatment projects in pharmaceutical, metallurgical, and chemical industries. Our scrubbing systems are designed for specific corrosive gases (HCl, SO₂, NOx, HF, NH₃) and local emission standards.
Each project includes process design, corrosion-resistant equipment manufacturing (FRP/PP/PVC), on-site installation, and commissioning.
Chemical Enterprise — Multi-Pollutant Acid Gas & VOCs Treatment
| Pollutants | VOCs, HCl, SO₂, Cl₂, etc. |
|---|---|
| Inlet Concentration | 500 mg/m³ |
| Gas Flow Rate | 60,000 m³/h |
| Treatment Process | 3-Stage Alkaline Scrubbing → Demisting → Activated Carbon Adsorption → 25m Stack |
| Removal Efficiency | 98% |
A large-scale chemical manufacturing plant discharging a complex mixture of volatile organic compounds and corrosive acid gases including hydrogen chloride, sulfur dioxide, and chlorine at concentrations up to 500 mg/m³. We engineered a comprehensive multi-barrier treatment system featuring three alkaline scrubbing towers in series for progressive acid gas neutralization, followed by a high-efficiency mist eliminator to capture aerosolized droplets, activated carbon adsorbers as a polishing stage for residual VOCs, and a 25-meter exhaust stack for safe dispersion. The three-stage alkaline scrubbing configuration ensures that even peak acid gas loads are fully neutralized before reaching the carbon beds, extending their service life significantly.
Pharmaceutical Pilot Plant — Acid-Base & VOCs Exhaust Treatment
| Pollutants | Acid gases, Alkaline gases, VOCs |
|---|---|
| Gas Flow Rate | 3,000 m³/h |
| Treatment Process | 2-Stage Wet Scrubbing (Acid-Base Neutralization) → Activated Carbon Adsorption |
| Removal Efficiency | 98% |
A pharmaceutical pilot-scale production facility generating intermittent exhaust streams containing both acidic and alkaline fumes along with organic solvent vapors during drug synthesis and formulation processes. The relatively low flow rate of 3,000 m³/h but highly variable composition required a flexible treatment approach. We designed a compact two-stage counter-current wet scrubbing system where the first stage targets acidic components and the second stage handles any residual alkaline species, achieving efficient pH-neutralization across varying load conditions. A downstream activated carbon adsorption unit provides final polishing for organic solvent vapors. The entire skid-mounted system fits within the pilot plant’s constrained footprint while maintaining ease of maintenance access for filter and carbon replacement. This project demonstrates our capability to deliver effective air pollution control solutions even for small-scale operations with complex, variable exhaust characteristics.
Pharmaceutical Chemical Enterprise — NOx & NO₂ Treatment
| Pollutants | Nitrogen Oxides (NOx, NO₂) |
| Inlet Concentration | 215 kg/h |
| Gas Flow Rate | 3,000 m³/h |
| Treatment Process | 6-Stage High Tower Water Absorption → 3-Stage Alkaline Wash |
| Removal Efficiency | 99.50% |
A pharmaceutical chemical manufacturer discharging nitrogen oxides (NOx, NO₂) at significant concentrations required a high-efficiency absorption system to meet stringent emission limits. We engineered a multi-stage treatment train featuring six high towers for water absorption of soluble nitrogen oxides, followed by three-stage alkaline washing to ensure complete removal of remaining acidic components. The 9-tower cascade configuration delivers exceptional removal efficiency of 99.50%, making it suitable for applications where every percentage point matters.
Metallurgical Enterprise Dust & Sulfuric Acid Mist Treatment
| Pollutants | Dust, Sulfuric Acid Mist |
| Gas Flow Rate | 15,000 m³/h |
| Treatment Process | Cyclonic Dynamic Scrubber → Acid Mist Absorption Tower |
| Removal Efficiency | 90% |
A metallurgical facility generating particulate matter and sulfuric acid mist from smelting operations required a robust scrubbing system capable of handling high dust loads while achieving effective acid mist removal. We delivered a two-stage solution combining a cyclonic dynamic scrubber for initial dust and coarse droplet removal, followed by a packed-bed acid mist absorption tower for fine mist capture. The system operates continuously with minimal maintenance requirements.
Facing Acid Mist or Corrosive Gas Emissions?
Tell us about your exhaust gas composition, concentration, and flow rate. Our engineering team will design a custom scrubbing solution and provide a preliminary proposal within 24 hours.