What is the purpose of installing an exhaust gas bypass on a waste heat boiler?

The installation of an exhaust gas bypass on a waste heat boiler primarily serves to minimize moisture condensation in the boiler gas passages at low loads. When a waste heat boiler operates at lower loads, the temperature of the exhaust gas can decrease significantly. This reduction in temperature can lead to the formation of moisture, which can condense in the gas passages. Such condensation can result in corrosion, reduced efficiency, and even blockages in the system.

By utilizing an exhaust gas bypass, the flow of exhaust gas can be redirected, allowing it to maintain a higher temperature as it passes through the system. This helps to mitigate moisture build-up, protecting the integrity of the boiler and ensuring efficient operation. Maintaining proper temperatures is crucial in preventing issues associated with condensation and enhancing the overall reliability of the boiler system.