Which characteristic would minimize erosion of pressure parts in a boiler?

Minimizing erosion of pressure parts in a boiler is crucial for maintaining efficiency and prolonging equipment life. The characteristic that would effectively achieve this is a gas flow velocity that allows complete combustion.

When combustion is incomplete, it can produce larger amounts of unburnt fuel and particulates. These materials can contribute to increased erosion as they exit through the stack or interact with various surfaces within the boiler. A well-optimized gas flow velocity facilitates better mixing of fuel and air, leading to efficient combustion. This not only ensures that all available fuel is fully combusted—reducing the likelihood of particulates—but also helps to manage heat transfer more effectively, thereby reducing thermal shock and associated wear on pressure parts.

Additionally, complete combustion results in lower concentrations of corrosive by-products, which further protects the integrity of pressure parts from erosion and corrosion. Thus, achieving a gas flow velocity that supports complete combustion is essential for minimizing erosion within the boiler’s pressure parts.