The economizer can be installed at the rear of exhaust gas stovepipe to recovery exhaust gas heat,increase the electricity output,lower the coal consumption spiral finned tube economizer is a new and efficient heat transfer equipment, which is a good solution to the light tube economizer because of badly worn, short life and other shortcomings. 1, material composition It is made of spiral finned tubes,inlet header,outlet header, elbow and other supporting material. 2, the structural arrangement Spiral finned tubes are in-line arrangement or staggered layout, water in the pipe. 3, Features heat transfer area can be greatly extended, reducing the volume and angle fittings, enhanced heat transfer. hard fouling Clogging: As gas flows through the finned tube forming the boundary layer, resulting in the vortex. adapting to wide temperature, high pressure;impact resistance low flue gas resistance