Product code: RXSOL-34-6119-250
Powerful concentrated corrosion inhibitor acts as oxygen scavengers used to effectively remove dissolved OXYGEN
This is most common oxygen treatment as a scavengers used to effectively remove dissolved OXYGEN from your feedwater. By the presence of dissolved oxygen in system, corrosion and pitting caused on metal surface. Removes dissolved oxygen, By acting as an oxygen scavenger.
A fast-acting, catalyzed sodium sulphite (Na₂SO₃) oxygen scavenger for low- and medium-pressure boiler systems. The product reacts stoichiometrically with dissolved oxygen to prevent corrosion in boilers, feed lines, and condensate systems by converting oxygen to inert sulfate.
Application
- Oxygen removal in low/medium-pressure boilers (typically up to ~65 bar; usage above this pressure is uncommon due to potential sulfate/solids carryover).
- Hot standby protection to prevent pitting during idle periods i.e. Oilfield Application.
- Feedwater & deaerator outlets where residual O₂ must be suppressed rapidly.
Dosage
Reaction (overall):
Na₂SO₃ + ½ O₂ → Na₂SO₄
Catalyst accelerates the reaction at lower temperatures and shorter residence times (e.g., in deaerator outlets and feedwater lines)
- Deaerator outlet O₂: ≤ 7–10 ppb (if DA present)
- Sulfite residual in boiler water:
- Normal operation: 20–40 mg/L as Na₂SO₃
- High risk / wet lay-up: 60–100 mg/L as Na₂SO₃
- pH (feedwater/boiler): follow your internal treatment program (commonly FW pH 8.5–9.2; boiler water pH 10.5–11.5 depending on pressure).
- Preferably deaerator storage section or feedwater line upstream of economizer to ensure complete O₂ removal before the boiler.
Example Dose Calculation
Feedwater DO = 0.10 mg/L (100 ppb) at 20 m³/h.
Stoichiometric Na₂SO₃ = 0.10 × 7.88 = 0.788 mg/L.
With 1.3× safety factor → ~1.0 mg/L Na₂SO₃.
At 20 m³/h → 20 g/h Na₂SO₃ (as pure).
Using 38% liquid: 20 / 0.38 ≈ 52.6 g/h (~40 mL/h) (SG 1.32 ⇒ ~30 mL/h by mass; verify on site).
Fine-tune to maintain target sulfite residual in boiler.