Abstract
This paper briefly introduced the structure of DHN type saturated steam boiler, and taking the DHN-type saturated steam boiler as an example, the modification scheme to meet the needs of the production process steam was presented by improving the boiler steam temperature, neither changing the structure of boiler pressure parts nor increasing the operating pressure, and the main parameters of the before and after modification were tested, it achieved good economic benefit through the practical operation and provided the theoretical basis for the transformation of small steam boiler.
