A slanted finned tube heat exchanger

Abstract

The application discloses a heat exchanger with oblique finned tubes, which includes a heat exchanger shell, a tube sheet and several oblique finned tubes. The opposite sides are respectively provided with the inlet and outlet of the medium outside the tube, and the oblique finned tubes are arranged obliquely from the inlet of the medium outside the tube to the outlet of the medium outside the tube and / or from the outlet of the medium outside the tube to the inlet of the medium outside the tube, the flow direction of the medium outside the tube It intersects obliquely with the flow direction of the medium in the tube; or the inclined finned tube is set as a bent finned tube structure, and the flow direction of the medium outside the tube is partially obliquely intersected and partially vertically intersected with the flow direction of the medium inside the tube; or the flow direction of the medium outside the tube is There is an inclination angle between the horizontal plane and the flow direction of the medium in the pipe and the vertical plane. Compared with the prior art, this application has good heat exchange and anti-scaling effects after use, can reduce or avoid the operation and maintenance of heat exchanger shut down to purge fin ash, and has a simple structure and can prolong the service life of fin tubes.

Description

technical field [0001] The application relates to the technical field of heat exchange equipment in air conditioning, chemical industry, petrochemical industry, electric power energy, and iron and steel smelting industries, and in particular to an oblique fin tube heat exchanger. Background technique [0002] Traditional finned tube heat exchangers include various heating furnaces, finned tube preheaters, and air coolers. This type of heat exchanger is widely used, its design and manufacturing process is mature, and its safety is high. It is a key energy-saving equipment in heat exchange equipment. [0003] (1) The structure and function of the traditional finned tube heat exchanger. [0004] For the finned tube heat exchangers of the tube heat exchanger type and the air cooler type, a plurality of finned tubes of different numbers are arranged together, and the two ends of the finned tubes are respectively inserted into the tube holes of the tube sheet and connected with t...

AI Technical Summary

Problems solved by technology

However, since the traditional fins are basically installed perpendicular to the surface of the base tube, when the finned tube heat exchanger is installed vertically, the plane of the fins that is basically perpendicular to the surface of the base tube becomes a direction close to the horizontal plane. During long-term operation, the dust in the flue gas outside the tube or the dust in the air accumulates on the plane of the fins, forming dirt, which is difficult to remove, and forms a thermal resistance between the medium in the tube and the flue gas outside the tube, affecting heat exchange efficiency

The above problems occur when the finned tubes in the finned tube heat exchanger are installed vertically. If the traditional horizontal installation mode is used, the above problems do not exist, or the above problems are very small, and it is easy to wash them with a soot blower or jet water However, for the vertical installation mode, there will be a big problem that needs to be solved urgently

[0010] In summary, the fin structure of the above-mentioned finned tube heat exchanger and the structural design of the finned tube heat exchanger are the most important and critical links to avoid dust accumulation and fouling. If the innovative fin structure and The structure of the finned tube heat exchanger is to prevent the existing technical problems, which often cause the heat exchanger to fail to achieve the design effect

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