Waste heat boiler (also known as after heat boiler) is an equipment that uses the waste heat of high-temperature smoke gas to heat water and produce steam. As the gas-liquid heat exchanger, it can be considered as the most commonly used heat recovery equipment in chemical production, which is applied in kinds of energy consuming processes. Doright can provide both vertical-type and horizontal-type waste heat boilers, including large-diameter waste heat boiler, quench waste heat boiler (also known as quench boiler), etc., which can meet customer needs at all levels.