Non-centrosymmetrical H-shaped finned tube and finned tube heat exchange tube bundle

Abstract

The invention discloses a non-centrosymmetrical H-shaped finned tube and a finned tube heat exchange heat tube bundle. The finned tube comprises a base pipe portion and a fin portion, wherein the base pipe portion comprises at least one base pipe, the fin portion comprises a plurality of fin groups welded on the outer walls of the base pipes by preset distance along the axial direction of the base pipes, each fin group comprises two quadrilateral fins arranged on two sides of the base pipes, each fin is connected with the outer walls of the base pipes through grooves in the inner side, and the fins are arranged on the same plane and reserve gaps larger than or equal to zero or are connected. The area of the windward sides of the quadrilateral fins are arranged is larger than that of the leeward sides. Since heat exchange performance of the fins on the windward sides is more excellent than that of the leeward sides, airflow separation, eddy and dust accumulation on the windward sides are less than those on the leeward sides. The non-centrosymmetrical H-shaped finned tube has the advantages that the integral heat exchange performance is improved, dust accumulation on the windward sides cannot be generated, total amount of the dust accumulation on the leeward sides is reduced, the non-centrosymmetrical H-shaped finned tube is applicable to heat exchange enhancement of smoke of oil and gas firing and more suitable for enhancing heat transfer of dust-contained flowing smoke.

Description

technical field [0001] The invention relates to an H-shaped finned tube, in particular to a non-centrosymmetric H-shaped finned tube and its finned tube heat exchange tube bundle, which are suitable for various types of heat exchange in industries such as energy, petroleum, chemical industry, and smelting. equipment and heating equipment. Background technique [0002] Energy is an important basis for economic and social progress. As my country's energy consumption continues to rise, many social and environmental problems have become increasingly prominent. Energy conservation and emission reduction has become a long-term policy and strategic decision for my country's economic and social development. Urgent task. [0003] Heat exchangers are important components of power equipment such as boilers. Solving the problems of enhanced heat transfer, dust accumulation and wear of heat exchangers is very important for improving energy utilization efficiency and service life of heat...

AI Technical Summary

Problems solved by technology

The contact area between the flue gas flow on the windward side and the base pipe and fins is larger than that on the leeward side, and the heat transfer performance of the fins on the leeward side, which is prone to air separation, is low and prone to dust accumulation

Due to the low thermal conductivity of ash deposits, as the degree of ash deposits increases, the heat transfer performance of the finned tubes will further deteriorate, the operation economy of the heat exchanger will be greatly reduced, and even serious consequences such as blockage of heat exchange equipment will occur.

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