Internally finned tube heat exchanger with micro wedge structures

Abstract

The invention relates to an internally finned tube heat exchanger with micro wedge structures. The internally finned tube heat exchanger comprises a heat exchange tube casing, and the heat exchange tube casing is inside provided with micro wedges and inner fins; each micro wedge comprises a lowest surface; four edges on the lowest surface extend outwards and intersect at the highest surface; for the four edges on the lowest surface, the upper side edge extends towards the inclined top to form a first surface, the lower side edge extends along the inner wall of the heat exchange tube casing to form a second surface, a left side edge extends towards the lower right to form a third surface, and a right side edge extends towards the upper left to form a fourth surface; each inner fin includes a first arc surface connected to a central shaft; two ends of the first arc surface extend towards the inclined tops to form inclined surfaces; the inclined surfaces extend outwards to form arc lugs; the end portions of the arc lugs extend towards the inclined bottoms to form second arc surfaces; each inner fin is connected with the central shaft; heat exchange chambers are formed among the central shaft, the heat exchange tube casing and the inner fins; and fluid passages are formed among the micro wedges. Hot and cold flow alternating is accelerated, heat transfer is enhanced, and the heat exchange efficiency of the heat exchanger is improved.

Description

technical field [0001] The invention relates to the technical field of heat exchange heat exchangers, in particular to an inner fin tube heat exchanger with a micro-wedge structure, which shortens the length of heating furnace tubes, improves the thermal efficiency of industrial heating furnaces and gas-fired boilers, and saves a lot of fuel . Background technique [0002] With the further development of the global industrialization process, energy saving and environmental protection issues have increasingly attracted the attention of countries all over the world; in view of the current energy saving and environmental protection problems of heating furnaces, a high-efficiency short-process industrial heating device has been developed, and condensing flue gas waste heat recovery technology has been adopted. Effectively improve the thermal efficiency of industrial heating furnaces and gas-fired boilers, save a lot of fuel, and produce significant energy-saving benefits; Among ...

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Problems solved by technology

[0002] With the further development of the global industrialization process, energy saving and environmental protection issues are increasingly concerned by countries all over the world; in view of the current energy saving and environmental protection problems of heating furnaces, a high-efficiency short-process industrial heating device has been developed, and condensing flue gas waste heat recovery technology has been adopted. Effectively improve the thermal efficiency of industrial heating furnaces and gas-fired boilers, save a lot of fuel, and produce significant energy-saving benefits; Among them, the heat exchanger is currently widely used for finned tube heat exchangers, and the heat dissipation area can be enlarged through fins to enhance the heat exchange effect , but the finned tube heat exchanger type, shape, and the setting of finned tube parameters all affect the cooling effect, and in the current energy crisis, there is an urgent need to save energy to meet the sustainable development of society , so it is necessary to develop a new finned tube, and at the same time, it is necessary to optimize the structure of the finned tube to maximize the heat exchange efficiency, so as to save energy and achieve the purpose of environmental protection and energy saving; in order to shorten the convection section of the heating furnace tube The process needs to improve the convective heat transfer performance in the furnace tube, so a new heat exchanger is needed to solve the above technical problems

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