Double-high burner

The present invention relates to a double-high combustor, including three portions of air supplying portion, fuel supplying portion and varporization heating and combustion portion. As compared with existent combustor said invention possesses the following advantages: heating air to obtain high-temp. air mixing the high-temp. air with high-temp. gas to make mixed combustion, combustion temp. is high, combustion is stable, combustion is full and high in thermal efficiency, CO and NOx contents are low, its preheating vaporization chamber is placed outside of combustor, it can reduce heat quantity loss, and can increase heating varporization area, and its gas temp. is raised, so that it possesses good service ability.