Heat exchange device utilizing combustion waste heat with grating dispersion heat exchange structures

Abstract

The invention provides a heat exchange device utilizing combustion waste heat. The heat exchange device comprises a heat exchange core; the heat exchange core is arranged in a waste gas flue and comprises circular tubes; the circular tubes are arranged perpendicular to the flowing direction of waste gas; a plurality of dispersion heat exchange structures are arranged in the circular tubes in a segmented mode; each dispersion heat exchange structure comprises a core and a shell, wherein the core is arranged in the shell; the shells are fixedly connected to the inner walls of heat exchange tubes; each core is formed by arranging and combining a plurality of grating sheets; and the grating sheets are mutually connected to form grating holes. The heat exchange device has the advantages that the grating type dispersion heat exchange structures are arranged in the heat exchange tubes so as to separate a steam-water mixture in the heat exchange tubes, and therefore the film boiling phenomenon on the water side can be effectively reduced, the convective heat exchange intensity of the water side can be increased, the heat load of the heat exchange core can be reduced, and the heat exchange efficiency can be improved.

Description

technical field [0001] The invention belongs to the field of heat exchange, and in particular relates to a shell-and-tube heat exchange device for waste heat utilization. Background technique [0002] In the past ten years, due to the shortage of energy sources, with the further development of energy conservation work. A variety of new, energy-saving and advanced furnace types are becoming more and more perfect, and the use of high-quality insulation materials such as new refractory fibers has significantly reduced the heat dissipation loss of the furnace. The advanced combustion device is used to strengthen the combustion, reduce the amount of incomplete combustion, and the air-fuel ratio tends to be reasonable. However, the technology of reducing the heat loss of flue gas and recovering the waste heat of flue gas is still not progressing fast. In order to further improve the thermal efficiency of the kiln and achieve the purpose of saving energy and reducing consumption,...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low heat exchange efficiency, large weight, large occupied volume, and poor high temperature resistance of existing waste heat utilization heat exchange devices, and propose a compact structure, high temperature resistance, high power density, and high heat exchange efficiency. heat exchange device

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