H-finned tube,Double H fin tube for economizer

H-type fin (finned) tubes are widely used in various power station boilers, industrial boilers, industrial kilns, and ship heat exchangers to strengthen the heat exchange element of the heating surface of the heat exchanger, because its cross-sectional shape is like the English letter H, according to Single tube double tube, also known as single H finned tube or double H finned tube.

H-type finned tube, also known as Square Fin Tube, is made by welding two steel sheets with an arc in the middle symmetrically with the light tube to form a fin (fin) whose front shape is quite similar to the letter “H”, so it is called “H”. H-finned tube. The two fins of the H-finned tube are rectangular, approximately square, and the side length is about twice the diameter of the light pipe, which is an extended heating surface. H-shaped finned tubes can also be made into double-tube “double H”-shaped finned tubes, which have good structural rigidity and can be applied to occasions with long tube rows.

Detailed introduction of high frequency welding H-finned tube:

H-type (square) finned tube (finned tube) material: carbon steel, stainless steel, ND steel, alloy steel, etc.
Tube outer diameter (mm): φ25~φ65
Pipe wall thickness (mm): 2-16
Finned tube length (mm): 500-20000
Fin width (mm): 25-57
Fin length (mm): 50-500
Fin thickness (mm): 1.5-3.5
Fin spacing (mm): 10-50
Finned tube material and type
Weldable fin material: carbon steel, corrosion-resistant steel, stainless steel, alloy steel
Weldable fin form: high frequency welding

The structure of the double-H finned tube adopts a separate structure for the ash-prone parts of the tube, and the fins of the finned tube form a cantilever beam structure. Under the action of the pulsed airflow, the vibration of the fins is more conducive to the treatment of ash removal. , can slow down the deposition, blockage and wear of soot on the heating surface, especially slowing the wear can ensure a reasonable service life of the heating surface; and the double H finned tube expands the heating surface and greatly increases the heat transfer coefficient, thus making the heating surface The volume becomes smaller, the weight is lighter, and the steel consumption is reduced.

The economizer chooses the H-shaped fin tube, which can solve the problem of tube bundle wear of the economizer heat exchanger, improve the heat exchange efficiency and resist wear!

The wear rate statistics of economizer base pipe: rectangular fin pipe 2.339%, H type fin pipe 0.078%, double H type fin pipe 0.008%, spiral fin pipe 2.644% (wear rate greater than 1×10-10kg/( m2 s) area accounts for the proportion of the entire pipe)