Wear-resistant finned tubes and heat exchangers

Abstract

The invention discloses an anti-wear fin tube and a heat exchanger, wherein the anti-wear fin tube includes a base tube and fins arranged on the outer surface of the base tube, and is characterized in that: There is a drainage groove with an upper end opening on the surface, the height of the drainage groove is 1 / 2 to 4 / 5 of the fin height, and the width of the drainage groove is 1 / 6~1 / 4 of the diameter of the base pipe; the fins are Parallel fins or helical fins arranged at intervals. Compared with the prior art, the present invention has little effect on the extended surface area of ​​the finned tube by slotting the fins on the upstream side of the spiral or circular finned tube, and retains the advantage of the large heat exchange area of ​​the finned tube. By adjusting the height and width of the drainage groove, the wear of traditional spiral finned tubes or circular finned tubes can be effectively improved, and the wear resistance is better than that of H-shaped finned tubes. At the same time, because the fins of the present invention are arc-shaped, the anti-wear performance of the fins is more obvious than that of the H-shaped fin tube.

Description

technical field [0001] The invention is applied in the field of boiler flue heat exchangers, and in particular relates to a finned tube which can effectively improve the wear resistance of the heat exchange tube and a heat exchanger with the finned tube. Background technique [0002] Finned tubes are one of the important heat exchange elements for recovering waste heat and enhancing heat transfer in industry. They are widely used because of their compact structure, increasing the total effective area participating in convective heat transfer, and reducing the thermal resistance of heat transfer outside the tube. . Commonly used finned tubes in the industry include circular finned tubes, H-shaped finned tubes, and spiral finned tubes. When the dust-laden flue gas flows through the heat exchanger to scour the heating surface, the flue gas particles in the air flow collide with the tube wall, which will cause wear to the fin tube over time, and the fin tube wear will affect th...

AI Technical Summary

Problems solved by technology

However, the rigidity and elastic compensation ability of the diaphragm tube row is lower than that of the light tube, and the finned surface area is far less than that of the traditional spiral fin tube, and the heat transfer enhancement effect is poor.

[0007] In short, most of the existing finned tube designs are at the expense of sacrificing the heat transfer area and reducing the heat transfer efficiency, which seriously affects the advantages of high heat transfer efficiency of traditional finned tubes

Images