H type finned tubes for economizers
H type finned tubes economizer technology is a high-efficiency heat exchange economizer assembled with H-type finned tubes (also known as H-type finned tubes, ribbed tubes, butterfly tubes).
1. Structural form:

The basic form is “H” type and double “H” type, arranged in series.

2. Performance characteristics

(1) Economizers use H-type finned tube economizers instead of light tube economizers to increase the heat exchange area and reduce the number of tubes arranged, thereby increasing the flue gas flow cross-section, reducing the flue gas velocity, and reducing wear. Since the tube wear rate is proportional to the 3.33 power of the flue gas flow rate, if the flue gas velocity is reduced from 9m/s to 7m/s, the wear rate will be reduced to 43% of the original. At the same time, experiments have shown that the finned tube itself has the effect of concentrating the fly ash in the middle of the tube row, so the use of finned tube economizers has the effect of reducing wear in terms of structure.

(2) H-type finned tubes can be manufactured into double-tube “double H” finned tubes. The rigidity of the structure is good and can be used in places where the tube row is long.

(3) The H-type finned tube economizer adopts a serial arrangement. The H-type fins divide the space into several small areas, which has a uniform flow effect on the airflow and greatly reduces wear.

(4) Since the H-type fins form straight channels on both sides, they can achieve a good soot blowing effect.

(5) The space is compact, the overall weight is greatly reduced, and the cost is reduced.

(6) Energy saving and low power consumption: The economizer used in the generator set can reduce at least two-thirds of the heat loss of the generator exhaust gas, and only consumes 2 to 4kW of electricity per ton of steam.

(7) Simple operation and maintenance; saving labor: The economizer is assembled as a whole and shipped out of the factory, with few moving parts, simple structure, and easy installation. The automation level is high, the operation and maintenance are simple, and the number of operating personnel can be reduced.

3. Parameters

Steam pressure: 0.5～4.0 MPa

Steam form: saturated steam/superheated steam

4. Circulation mode

Natural circulation/forced circulation

5. Scope of application

Applicable to various types of generator sets with a power range of 600kW～15000kW and various waste heat resources with a temperature greater than 300℃.

H-type (square) finned tube (fin tube) specifications: φ32*4 φ32*5 φ38*4 φ38*5 φ42*5 φ48*5 φ51*5 φ51*6, etc. The tube diameter we can produce: φ25~φ65, wall thickness greater than 3mm;

H-type (square) finned tube (fin tube) material: carbon steel, stainless steel, ND steel, alloy steel, etc.

It can be customized according to the specific requirements of users, and we can also help users design.