Troubleshooting Measures for Water Leaks in Different Parts of Closed Cooling Towers
2021-07-13
Currently, most closed cooling towers on the market are made from materials that are resistant to corrosion or damage, such as galvanized steel sheets and fiberglass-reinforced plastic. The coolant also flows through sealed copper pipes, so theoretically, there shouldn’t be any leaks. But then why do people keep saying their cooling towers are leaking?
There can be many reasons for water leakage in closed cooling towers—perhaps the tower has been in use for a long time and is now showing signs of aging and malfunction. Even newly installed closed cooling towers may experience leaks, so there’s no need to panic; such issues could simply stem from minor deviations during the manufacturing process. Based on experience, here’s a brief summary of the main areas where leaks typically occur in closed cooling towers: corrosion damage and seepage in the tower structure, leakage at structural joint sections, pipe leaks, and pump-related seepage. Below, we’ll outline some effective methods for sealing leaks when they occur in closed cooling towers.
1. Tower body corrosion causing water leakage
This leakage occurred because the long-term corrosive effects of the operating environment affected the tower material, resulting in uneven wall thickness. As a result, destructive leaks developed in areas where the thickness was relatively thin. Methods to address blockages in FRP cooling towers include: surface cleaning, polishing and cleaning, degreasing with detergents, and reinforcing with an epoxy resin repair compound combined with glass fiber tape.
2. Water leakage at the junction between the tower body and the pool
When assembling a closed cooling tower, the aluminum-zinc panels are securely pressed together using practical sealant, ensuring a tight and durable seal. However, prolonged operation and the constant impact of water spray can cause deformation of the tower body, leading to sealant detachment and leaks at the joints. To repair these leaks: since each section consists of aluminum-zinc panels, we can fill the internal gaps within the cooling tower with sealant to effectively plug the leaks.
3. Leaking pipe connections
When connecting the piping to the closed-circuit cooling tower with seals, several flanges and elbows are used; a sealing ring is added between these connections. If the pipes leak, the primary cause is usually an inadequate seal at the pipe joints. A damaged or misaligned sealing ring can lead to a weak seal, resulting in water leakage. To fix the leak, you can either tighten the pipes further or replace the sealing components with new ones.
4. Pump Leakage
Leakage from the closed cooling tower pump can also lead to pressure instability, as well as cause system overheating or shutdown. While water leaks from pumps are relatively rare in everyday life, they typically occur due to wear on the pump’s mechanical surfaces or failure of the mechanical seals. To address the leak, you can readjust the dynamic and static balance and replace the pump seal.
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