What is the function of a water back in a stoker?

A water back in a stoker serves the critical function of cooling the wall of the stoker unit, which helps to prevent clinkers from forming. Clinkers are solid masses that can form from the combustion of certain fuels, especially when there are variations in temperature or inadequate airflow. By directing water through the back of the stoker, heat is absorbed which helps maintain an optimal temperature in the combustion zone. This cooling effect not only prolongs the life of the equipment but also ensures that combustion is more efficient and consistent, reducing the likelihood of clinker formation and related operational issues.

Heating the boiler water is not the primary function of a water back; it operates more as a cooling mechanism rather than for heating purposes. While additional airflow can enhance combustion efficiency, the water back specifically targets the cooling and prevention of clinkers. Measuring combustion temperature is important for many heating systems but is not associated with the primary role of the water back in a stoker. Thus, the function of cooling the wall and preventing clinkers makes the water back an essential component in maintaining the performance and reliability of the stoker system.