D type boiler is widely used in petrochemical industry because of its characters of compact construction, less area occupied, short site installed period, easy operating and maintenance.
型锅炉以其结构紧凑，占地小，安装周期短，运行维护方便等特点，在国内石油化工系统得到了广泛的应用。
2
Triple coil structure is adopted for the boiler with three-pass smoke and flue, compact design and energy-saving space. The air pre-heater is added to enhance the heating efficiency up to 92% or more.
锅炉采用三盘管结构，烟气三回程，设计紧凑，节能空间，增加空气预热器时热效率最高可达92%以上。
3
Square flange heaters (boiler heaters) are suitable for constrained areas, square and round flanges are made of compact elements that are easily installed by tightening a series of bolts.