In the process of using laser welded finned tube, it is not only suitable for the flow of single-phase fluid, but also has great value for phase change heat transfer. Most of the finned tube heat exchangers used for clean gas use the fin surface structure, which has achieved good heat transfer enhancement.
Compared with other processes, the laser welding fin tube greatly saves the material cost, achieves high penetration rate, and can better prevent the corrosion of the gap when in use, which will correspondingly increase the service life of the equipment and reduce the thermal resistance of heat transfer.
Application of laser welding finned tube in steam generator.
The performance of steam generator is greatly improved by the combination of condensation and combustion technology
1. Start up steam for 5 seconds, and switch the number of modules according to the steam consumption.
2. High energy saving, thermal efficiency of 105%, 40% energy saving than traditional steam equipment.
3. Modular design, energy distribution on demand, energy saving on demand, better control of steam quantity.
4. Green and low-carbon, using liquefied gas as the main energy, the emission is lower than the regional emission standards, which is beneficial to environmental protection.
5. One button start, no preheating, better energy supply.
6. Highlights: high temperature and corrosion resistance of laser welded finned tube, long service life, small volume, no pickling, straight tube and coil.
Field testing method of laser welded finned tube
In fact, laser welded finned tube is a kind of heat exchange tube. When it is used, its main function is to increase its heat exchange efficiency. Usually, the outer surface area (or inner surface area) of the heat exchange tube is increased by adding fins on the surface of the heat exchange tube, so as to achieve the purpose of increasing the heat exchange efficiency.
Detection method of laser welded finned tube:
1. Double pipes should be buried when the pile diameter is 0.6-0.8m, three pipes should be buried when the pile diameter is 0.8-2.0m, and four pipes should be buried when the pile diameter is more than 2.0m. According to the specific situation of Chifeng bridge, three pipes can be buried in the pile foundation.
2. When the laser welded finned tube is used, the sound wave detection tube should be steel pipe, plastic pipe or steel bellows, and its inner diameter should be 50 ~ 60mm. The joint of the detection pipe shall be smooth transition, the pipe orifice shall be more than 100 mm higher than the pile top, and the pipe orifice height of each detection pipe shall be the same, the lower end of the pipe shall be closed, the upper end shall be covered, there shall be no foreign matter in the pipe, and the pipe body shall not be damaged.
3. The detection tubes can be welded or tied on the inner side of the reinforcement, and the detection tubes should be parallel to each other.