To counter the abuse existing in air heating apparatus of gas combustor at ammoniumsulfur drying system,the technique reformation of heater is made and is successful.

• 针对杭钢焦化硫铵生产线硫铵干燥系统的煤气燃烧器空气加热装置存在的弊端,进行了技术改造,并取得了成功。