For coal-fired industrial boilers, the use of H-type finned tube economizers to increase feedwater temperature and enhance heat transfer is one of the effective measures for waste heat recovery from flue gas. This promotes complete coal combustion and improves energy efficiency.

The two fins of the H-type finned tube are rectangular, with side lengths approximately twice the outer diameter of the bare tube, serving as an extended heating surface. The fins are welded using flash resistance welding technology, ensuring high fusion rates, strong tensile strength of the weld seams, and excellent thermal conductivity. Additionally, the H-type finned tube can be manufactured as a double-tube (dual H-type) structure, which offers higher rigidity and is suitable for applications with longer tube arrangements.

Outstanding Wear Resistance:
The H-type finned tube economizer adopts an in-line arrangement, dividing the space into small zones with its fins to evenly distribute airflow. Compared to bare tube economizers, spiral finned tube economizers, and longitudinal finned tube economizers with staggered arrangements under the same conditions, its wear resistance life can be 3–4 times longer.

Excellent Anti-Dust Accumulation Performance:
Since the H-type fins are vertically welded on the sides of the tube where dust is less likely to accumulate, and the airflow passes straight through without changing direction, the 4–10 mm gap between the fins allows the airflow to sweep away any deposited ash. This design ensures effective self-cleaning and minimizes dust buildup.

Simple Structure:
The H-type finned tube economizer requires fewer tubes, fewer bends, and fewer welds, making it compact, cost-effective, and low in airflow resistance.

Therefore, the H-type finned tube economizer is highly suitable for waste heat recovery in industrial boilers. Its rational structural design, ease of maintenance, and small footprint make it an ideal choice for integration with new industrial boilers or retrofitting existing ones by installing it in the tail flue. It offers excellent economic benefits and broad applicability.