From Theory to Practice: In-depth Analysis of Magnesium Hydroxide Application in Acidic Waste Gas Treatment Case

Despite its significant advantages, magnesium hydroxide faces several technical challenges in practical applications: • Precise control of slurry concentration is critical, with the recommended optimal mass concentration being 15%-20%. Excessive concentration increases pipeline resistance during pumping. • Temperature management proves equally crucial, requiring maintenance of reaction temperature within 40-60℃. Winter operations necessitate steam heating systems to ensure thermal stability.

A successful implementation case in a Zhejiang textile dyeing factory adopted the "Venturi scrubbing + magnesium hydroxide neutralization" process:

1. Waste gas undergoes preliminary treatment through cyclone dust removal before entering Venturi tubes for full contact with atomized slurry
2. Neutralized gas subsequently enters cyclone tray towers for advanced purification
3. Circulating liquid is periodically discharged into sedimentation tanks, achieving 80% reuse rate of supernatant

This solution significantly reduced SO₂ emissions from 2000mg/m³ to 35mg/m³, with treatment costs as low as RMB 0.8 per ton of exhaust gas - 60% lower than activated carbon methods.

Looking ahead, advancements in nano-magnesium hydroxide preparation technology promise to increase specific surface area to 80m²/g, potentially breaking through 95% desulfurization efficiency. When integrated with intelligent control systems, magnesium hydroxide applications may pioneer a new era of "precision governance" in industrial waste gas treatment.