Deaeration Section / Scrubbing Section

The deaeration/scrubbing section is a critical component of a deaerator system where dissolved gases are eliminated from water or industrial fluids. This section typically employs a combination of heating, pressure reduction, and contact with scrubbing media (such as steam or chemical solutions) to strip oxygen, carbon dioxide, and other non-condensable gases. It functions to prevent corrosion, improve thermal efficiency, and maintain product quality in various industrial processes. The section operates by exposing the fluid to conditions that reduce gas solubility—typically through heating to raise temperature and/or reducing pressure. In scrubbing configurations, the fluid comes into direct contact with a scrubbing medium (like steam or chemical solutions) that absorbs or reacts with the dissolved gases. The gases are then vented from the system, leaving deaerated fluid to proceed to subsequent stages. This component is typically fabricated from stainless steel, carbon steel, or alloy materials, with material selection depending on the fluid corrosivity and operating conditions. Key parameters include operating pressure (1.0–1.6 MPa), design temperature (104–120°C per GB/T 150), flow capacity (10–500 t/h), oxygen removal efficiency (≥99.5% per GB/T 1576), residual oxygen content (≤0.05 mg/L per GB/T 1576), pressure drop (0.02–0.05 MPa), material grade (Q345R/304 per GB/T 713), nozzle size (DN25–DN100 per GB/T 9112), weight (500–5000 kg), dimensions (1500×800×2000 to 5000×2000×4000 mm), insulation thickness (50–100 mm per GB/T 4272), and corrosion allowance (1.5–3 mm per GB/T 150). These values are reference ranges and must be verified for the specific model and application. The section is designed for integration into deaerator systems used in power generation, chemical processing, and boiler feedwater treatment. Proper selection requires consideration of fluid characteristics, required deaeration performance, and system interface dimensions. Verification with the manufacturer is essential to confirm compliance with applicable standards and to ensure the component meets the operational requirements.

The section operates by exposing the fluid to conditions that reduce gas solubility—typically through heating to raise temperature and/or reducing pressure. In scrubbing configurations, the fluid comes into direct contact with a scrubbing medium (like steam or chemical solutions) that absorbs or reacts with the dissolved gases. The gases are then vented from the system, leaving deaerated fluid to proceed to subsequent stages.