Oxygen Corrosion Problem

Dissolved oxygen in water causes severe pitting corrosion in steel piping, boilers, and equipment. Even trace oxygen at parts-per-billion levels damages metal surfaces. Chemical scavengers react with oxygen forming harmless compounds preventing corrosive attack.

Package Components

Chemical storage tank with level monitoring, metering pump with variable speed or stroke adjustment, injection quill or diffuser, pulsation dampener smoothing flow, pressure relief protection, flow verification, and control panel managing operation. Complete skid ready for field installation.

Chemical Types

Sodium sulfite most common reacting with oxygen forming sulfate. Hydrazine for high-pressure boilers though toxicity concerns limit use. Organic scavengers like carbohydrazide safer alternatives. Catalyzed formulations speed reaction. Selection depends on system pressure, temperature, and water chemistry.

Injection Points

Boiler feedwater deaerator outlet removing residual oxygen after mechanical deaeration. Closed cooling systems at circulation pump suction. Process water before critical equipment. Location ensures adequate mixing and reaction time.

Dosing Control

Residual oxygen analyzer provides feedback for automatic control. Fixed ratio dosing based on water flow common in simple systems. Proportional control adjusts chemical feed maintaining target residual. Control strategy balances protection versus chemical cost.

Operating Pressure

Pump discharge pressure 50-300 psig overcomes injection point pressure plus piping losses. Positive displacement metering pumps provide accurate dosing across pressure variations. Pulsation dampeners protect downstream instrumentation.

Material Selection

Chemical-resistant construction throughout. Polyethylene or stainless steel tanks. Pump wetted parts compatible with scavenger chemistry. Injection tubing and fittings resist chemical attack. Design prevents corrosion from treatment chemical itself.

Applications

Power plant boiler feedwater treatment, industrial boiler systems, closed cooling water circuits, process water treatment, and any water system requiring oxygen removal for corrosion prevention.

Monitoring Systems

Oxygen analyzers verify treatment effectiveness. Low oxygen indicates proper scavenging. High oxygen signals dosing issues. Chemical feed verification confirms pump operation. Integration with plant controls enables remote monitoring.

Performance Benefits

Prevents oxygen pitting extending equipment life decades. Reduces maintenance from corrosion damage. Protects expensive boilers and piping. Simple proven chemical treatment technology.

Compliance

System design meets applicable boiler and pressure vessel codes. Chemical handling per safety standards. Electrical systems for area classification. Complete documentation with installation and operating instructions.

ERGIL oxygen scavenger injection packages protect water systems from corrosion through automated chemical treatment in power generation and industrial applications.