What should be used to descale steam coils in a high-pressure evaporator for saltwater service?

The appropriate method for descaling steam coils in a high-pressure evaporator used for saltwater service is to utilize a chemical descaler. This approach is essential because saltwater can lead to significant mineral buildup and scaling within the coils. Chemical descalers are formulated to dissolve these mineral deposits effectively without damaging the metal components of the coils, which is a crucial consideration given the conditions under which high-pressure evaporators operate.

Using a wire brush, while it may remove some surface buildup, can risk scratching or damaging the coils, leading to potential leaks or further scaling complications. A high-pressure water jet might seem effective for cleaning, but it can also cause mechanical stress on the coils and may not reach the chemical compounds that contribute to scaling. Similarly, a rotary tool might risk damaging the surface or altering the integrity of the coils through abrasive action.

Chemical descalers provide a safe, efficient, and thorough solution to maintain operational efficiency and prolong the lifespan of the equipment in saltwater environments.