Impact of degasser tower in Demineralization plant

In the context of a Demineralization (DM) plant, a degasser is a crucial component used to remove dissolved gases, primarily carbon dioxide, from water. The removal of these gases is important because they can interfere with the ion exchange process in the demineralization system. Here are some details on the degasser and degasser tower in a DM plant:  Purpose of Degasser • Degasser: The main purpose of a degasser is to eliminate dissolved gases from water, especially carbon dioxide. Carbon dioxide can form carbonic acid when dissolved in water, and this acid can negatively impact the ion exchange resin's performance in the demineralization process.

 Degasser Tower: • Location: The degasser is often part of a larger structure known as the degasser tower, which is typically located upstream of the ion exchange unit in a DM plant. • Design: The tower is designed to allow the water to come into contact with the atmosphere, promoting the release of dissolved gases. It may consist of trays, packing material, or other configurations to facilitate the degassing process. • Operation: Water flows through the tower, and as it comes into contact with the air or a stripping gas (such as nitrogen), dissolved gases are released. The tower provides sufficient residence time for effective degassing.  Types of Degassers: • Vacuum Type Degassers: These degassers operate under a vacuum, which helps in the removal of dissolved gases more efficiently. • Open Tray Degassers: These degassers use open trays or packing material to expose water to the atmosphere, allowing gases to escape.  Materials of construction Degasser towers are typically constructed from materials resistant to corrosion, as they handle water with varying degrees of impurities.  Monitoring and Maintenance: • Regular monitoring of degasser performance is essential to ensure optimal degassing efficiency. • Maintenance may involve cleaning or replacing packing material, checking for any build-up of impurities, and ensuring proper functioning of any associated equipment. Impact of degasser on demineralization plant: The degasser in a Demineralization (DM) plant plays a crucial role in ensuring the effective operation of the entire demineralization process. Here are some key impacts of a degasser in a DM plant:  Removal of Dissolved Gases: • The primary function of the degasser is to remove dissolved gases from the water, especially carbon dioxide. These gases, if not removed, can form carbonic acid in the water, which can negatively impact the ion exchange process.  Enhanced Ion Exchange Efficiency: • By eliminating dissolved gases, the degasser ensures that the ion exchange resin beds operate at their maximum efficiency. Gases can interfere with the ion exchange process by competing with ions for binding sites on the resin.  Prevention of Resin Fouling: • The presence of gases can lead to resin fouling, reducing the effectiveness of ion exchange resins. Degassing helps prevent the accumulation of impurities and ensures a longer life for the resin beds.  pH Stabilization: The removal of carbon dioxide helps stabilize the pH of the water. Carbonic acid, formed by the dissolution of carbon dioxide, can make the water acidic. Stabilizing the pH is essential for maintaining the effectiveness of ion exchange resins.  Minimization of Corrosion: Carbonic acid and other acidic impurities removed by the degasser contribute to corrosion. By eliminating these impurities, the degasser helps minimize the risk of corrosion in downstream components of the DM plant.  Improved Water Quality: The degasser contributes to the production of high-quality demineralized water by ensuring that the ion exchange resins are not compromised by dissolved gases. This high-quality water is essential for various industrial processes where low conductivity and absence of impurities are critical.  Extended Equipment Life: By preventing resin fouling, corrosion, and maintaining optimal conditions for ion exchange, the degasser indirectly contributes to the extended life of equipment in the DM plant. This includes ion exchange resin beds, piping, and other components.  Operational Stability: The degasser enhances the overall stability of the DM plant by promoting consistent and reliable performance of the ion exchange process. This is essential for meeting the demineralized water requirements of industrial applications. In summary, the impact of a degasser in a DM plant is significant in terms of improving ion exchange efficiency, preventing resin fouling, stabilizing pH, minimizing corrosion, and ultimately ensuring the production of high-quality demineralized water for industrial processes. The degassing process in a DM plant is crucial for maintaining the efficiency of ion exchange resins, ensuring high-quality demineralized water for various industrial processes.