Axially through H-type finned tube and heat exchange tube bundle thereof

Abstract

The invention relates to an axially through H-type finned tube and a heat exchange tube bundle thereof. The H-type finned tube comprises a base tube part, a fin part and a through part, wherein the base tube part comprises at least one base tube; the fin part comprises a plurality of parallel fin groups which are arranged in the axial direction of the base tube and connected with the outer wall of the base tube; each fin group comprises two fins which are symmetrically arranged on two sides of the base tube and regularly arranged according to a certain pitch; a groove matched with the outer wall of the base tube is formed in the inner side of each fin; the through part comprises through grooves that are processed in parts of the surfaces of the fines in a smoke flowing direction and arranged relative to the base tube; and flow deflectors passing through the corresponding through grooves are arranged on a smoke outlet side and connect the fin groups in series in the axial direction of the base tube to change the axial cross section of the H-type finned tube from a plane into a three-dimensional structure. According to the axially through H-type finned tube and the heat exchange tube bundle thereof, an initial region of ash deposition can be effectively eliminated, a flow stagnation region on the leeward side of the finned tube is obviously reduced, and ash deposited on the side surfaces of the fins and the base tube in the flow stagnation region is greatly reduced; meanwhile, the heat transfer effect of the H-type finned tube is effectively enhanced; and the through grooves can be formed by punching, so that automatic production can be realized easily.

Description

technical field [0001] The invention relates to an H-shaped finned tube, in particular to an axially penetrating H-shaped finned tube and its heat exchange tube bundle, which is suitable for various types of heat exchangers in industries such as power, petroleum, chemical industry, refrigeration, and metallurgy. Heat and heating equipment. Background technique [0002] With the sustained and rapid development of my country's economy, the problem of energy supply shortage has become increasingly prominent, and energy conservation, emission reduction and consumption reduction have become the inevitable requirements of my country's economic and social development. As an important part of industrial processes such as power, petroleum, chemical industry, refrigeration, metallurgy and even aviation / rocket, heat exchangers are of great significance for their safe and efficient operation. In various heat exchange equipment, increasing the heat exchange area through fins is a common...

AI Technical Summary

Problems solved by technology

[0004] Judging from the existing patent situation, the patent 201120443516.5 proposes an elliptical H-shaped finned tube. Compared with the round tube, the elliptical tube does reduce the flow resistance to a certain extent, but because the general structure has not changed much, Without destroying the vortex stagnation zone, the improvement of the dust accumulation is relatively limited

Patents 201420286535.5 and 201420300136.X both provide heat transfer enhancement by adding some kind of longitudinal vortex generator, but compared with this patent, the longitudinal vortex generator disclosed in the above patent has a Insufficient height, when the pitch between fins is large, the heat transfer and anti-fouling performance will be reduced

The three patents disclosed in patents 201410290408.7, 201420343697.8 and 201420343761.2 are all through various deformations on the outer edges of the fins of conventional H-shaped finned tubes to achieve heat transfer on discontinuous surfaces, although this structure can effectively improve the heat transfer rate. The finning ratio of the heat pipe reduces the pitch of the fins, but under the high-speed airflow containing ash, the outer wear of the fins will be more serious, reducing the life of the finned tubes

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