南京智热节能科技有限公司

Product Concept:

The laser welded finned tube heat exchanger is a high-efficiency heat exchange component that uses high-precision laser welding technology to seamlessly fuse fins and base tubes. It breaks through the limitations of traditional expansion or high-frequency welding, achieving near-zero contact thermal resistance through metallurgical bonding, making it a cutting-edge product in the field of industrial heat energy transfer.

Core Applications:

Applied in heat exchange scenarios under harsh operating conditions that require the rapid and stable transfer of large amounts of heat energy, such as waste heat recovery, process fluid cooling/heating, air preheating, and refrigeration systems, significantly improving energy utilization efficiency.

Technical Structure:

Base Tube: Usually made of stainless steel, carbon steel, or special alloy tubes, forming the main body of the fluid channel.

Fins: Spiral metal strips, laser welded to the outer wall of the base tube, greatly expanding the heat transfer area.

Laser Weld Seam: A high-energy laser beam instantly melts the base of the fin and the surface of the base tube, forming a dense, uniform metallurgical bonding layer, eliminating gaps.  

Working Principle:

The fluid (liquid/gas) inside the tube and the fluid (usually gas) flowing through the fin area outside the tube exchange heat through the tube wall and fins. Laser welding ensures efficient heat conduction from the base tube to the fins, while the fins greatly increase the contact area and turbulence with the external fluid, achieving a leap in overall heat transfer efficiency.

Significant Features and Advantages:

1. Ultimate Thermal Efficiency: Laser welding achieves true metal fusion, with contact thermal resistance approaching zero, and heat transfer efficiency is increased by about 20% compared to traditional methods.

2. Exceptional Corrosion Resistance and Pressure Resistance: The weld seam is dense and seamless, preventing the ingress of corrosive media, and the overall structural strength is high, with high pressure resistance and vibration resistance.

3. Excellent High-Temperature Resistance: The metallurgical bonding structure is stable and can operate reliably at higher temperatures for extended periods (e.g., flue gas environments >400°C).

4. Extra-Long Service Life: Excellent corrosion resistance, wear resistance, heat resistance, and pressure resistance significantly reduce maintenance costs.

5. Excellent Ash Accumulation Prevention: The smooth, continuous weld seam surface and the optimizable fin spacing significantly reduce the risk of ash accumulation and blockage.

6. Compact and Lightweight Structure: For the same heat exchange capacity, the volume is smaller and the weight is lighter, saving space and material costs.

7. Flexible Manufacturing: Base tube material, diameter, fin height, and spacing can be manufactured according to process requirements.

Core Application Areas and Functions:

1. Power Industry:

    Function: Installed in the boiler tail flue, efficiently recovering high-temperature flue gas waste heat, preheating boiler feedwater or combustion air, significantly reducing exhaust gas temperature, improving boiler efficiency, and saving fuel consumption. Its high-temperature resistance, corrosion resistance, and wear resistance ensure safe and reliable operation of the equipment.

2. Petrochemical Industry:

   Function: Used in coolers, heaters, and air preheaters for process gases (such as cracked gas and synthesis gas). High efficiency and excellent corrosion resistance ensure long-term stable operation in harsh media containing sulfur and acids, ensuring production continuity and safety.

3. Iron and Steel Metallurgy:

   Function: Used in waste heat recovery systems (such as air preheaters and gas preheaters) for blast furnaces, rolling mills, and coke ovens. Its resistance to high-temperature dust scouring and corrosion effectively recovers waste heat from high-temperature waste gas, reducing energy costs.

4. Central Air Conditioning and Refrigeration:

   Function: As a core component of high-efficiency condensers or evaporators (especially air-cooled systems). The compact design and excellent heat transfer performance improve the system's energy efficiency ratio (COP), reducing equipment volume and refrigerant charge.

5. Environmental Engineering (VOC incineration, desulfurization and denitrification):

   Function: Used as a heat storage medium in RTOs (regenerative thermal oxidizers) or for heating/cooling flue gas in GGHs (gas-gas heat exchangers). High efficiency and corrosion resistance are crucial for handling high-temperature waste gases containing corrosive components, improving system heat recovery rate and economy.

Choosing a laser welded finned tube heat exchanger means choosing:

Visible Energy Efficiency Improvement: Significantly reduces operating energy costs and improves production efficiency.

Long-Term Reliable and Worry-Free Operation: Reduces maintenance frequency, extends equipment life, and lowers maintenance costs.

Confidence in Meeting Harsh Challenges: Fearless of high temperatures, corrosion, wear, and high pressure.

Future-Oriented Investment: Achieves sustainable recovery and reuse of waste energy, saving energy and reducing consumption, promoting low-carbon environmental protection, and green manufacturing trends.