H Type Finned Tubes for Economizers Used in Boiler Thermal Coal-fired Powe
H type Finned Tube For Boiler Economizer
H typoe Finned Tube is divided into single H Finned Tube and Twin H Finned Tube (HH or Doule H finned tube), also known as Rectangular Finned Tubes. H Finned Tube is made by welding square or rectangular H fins to a steel base tube.
Twin H type Finned Tube (HH or Doule H type Finned Tube)
The fins are divided into two symmetrical halves, the tube wall is pressed from both sides, and the tube wall is welded by
resistance welding, leaving a certain gap in the middle; two round tubes can share a set of fins, called Twin H Finned Tube
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Single H type Finned Tube
The fin is divided into two symmetrical halves, which press the tube wall from both sides, and are welded to the tube wall by resistance welding, leaving a certain gap in the middle; there is only one round tube in the middle, which is called Single H Finned Tube.
The heat exchanger composed of H-shaped finned tubes is closely arranged, and the tube bundles are arranged in a row.
H type Finned Tube Quick Details:
Core tube material:
1. Carbon Steel: A106 / A179 /A192 / A210 etc…
2. Stainless Steel: TP304/304L,TP316/TP316L, TP347 etc…
3. Alloy Steel: P5,T5,P9,T9,T11,T22
Fin Material:
1. Aluminum (Alu.1100, Alu.1060)
2. Copper.
3. Steel
Tube OD: 73 mm max.
Tube Length: 18 meters max.
Fin Thickness: 1.5mm ~3.5mm
Fin Pitch: 10mm Min.
Surface Protection: Both bare ends shall be zinc or aluminum metallized by electrospray arc system coating.
Accessories: Tube support boxes, clamps or spacer boxes (materials: aluminium, zinc and stainless steel).
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Additional Info
Payment Terms:T/T, LC
Delivery: 15-30 days after payment
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Iron frame packing boxes and the desiccants are put into each package for continental transportation as well. or as required
maximum. Operating temperature: 300°C
Atmospheric corrosion resistance: OK
Mechanical resistance: good
The influence of the structure of H Finned Tube on ash accumulation and wear: the gap between the two sheets can use the flow of flue gas and scour the ash accumulation, because the flue gas has a higher flow rate at the gap; the tubes are arranged in a row,and the resistance Small wear and tear; H-shaped fins can effectively utilize the flow space and maintain a large fin area and finning ratio; The thickness of the fins can be arbitrarily selected according to the needs of anti-wear; The fins are parallel and independent of each other, without helix angle effect, thus facilitating ash removal.
H type Finned Tube is usually used in Economizers, Heat exchangers, Marine boilers.
Application and Material Specifications of H-Type Fin Tubes in Boiler Economizers
Boiler economizers play a crucial role in enhancing the efficiency of power plants and industrial boilers by recovering waste heat and converting it into usable energy.
One of the key components in boiler economizers is the H-type fin tube, which significantly contributes to improving heat transfer and overall system efficiency.
What are H-Type Fin Tubes?
H-type fin tubes are a type of heat exchange tube characterized by their unique fin structure, which resembles the letter ‘H’ when viewed in cross-section. This design enhances the surface area available for heat transfer, making them highly efficient in applications involving high temperature and pressure differences.
Application in Boiler Economizers
Boiler economizers are designed to absorb heat from the flue gases produced during the combustion process in boilers. This heat would otherwise be wasted and released into the atmosphere. The H-type fin tubes, with their increased surface area, are ideal for this purpose as they can efficiently transfer heat from the flue gases to the water or steam circulating within the economizer.
H-type fin tubes are used in boiler economizers to:
Improve Heat Transfer Efficiency: The extended surface area provided by the fins enhances heat absorption from flue gases, improving overall thermal efficiency.
Reduce Fuel Consumption: By recovering more heat, economizers fitted with H-type fin tubes can reduce the fuel required for boiler operations, leading to cost savings and reduced environmental impact.
Enhance Boiler Performance: The improved heat transfer capabilities of H-type fin tubes help maintain stable boiler operation and can contribute to better temperature control within the boiler system.
Material Specifications
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Common materials used for these tubes include:
Carbon Steel: Known for its strength and cost-effectiveness, carbon steel is widely used in applications where corrosion resistance is not a primary concern.
Stainless Steel: Offering superior corrosion resistance and higher durability, stainless steel is ideal for environments with high moisture and varying temperatures.
Alloy Steels: For applications requiring even higher strength and corrosion resistance, alloy steels are used. These materials can withstand extreme conditions and provide extended service life.
Inconel and Hastelloy: In highly corrosive and high-temperature environments, specialized alloys such as Inconel and Hastelloy are employed due to their excellent thermal and chemical resistance properties.
The choice of material depends on the specific operating conditions of the boiler, including temperature, pressure, and the chemical composition of the flue gases.Conclusion
H type fin tubes are a vital component in boiler economizers, significantly enhancing heat transfer efficiency and contributing to the overall performance and efficiency of the boiler system. The material specifications of these tubes are crucial for ensuring their durability and effectiveness under varying operational conditions.
By understanding the role and material requirements of H-type fin tubes, engineers and maintenance personnel can optimize the performance and longevity of boiler economizers in industrial and power generation applications.
