Optimized design method of heat exchange structures of heat exchange device for combustion waste heat utilization

Abstract

The invention provides an optimized design method of heat exchange structures of a heat exchange device for combustion waste heat utilization. The heat exchange device comprises a heat exchange core body, wherein the heat exchange core body comprises a cover plate and a plurality of heat exchange tubes, the heat exchange tubes comprise round tubes, the plurality of dispersing heat exchange structures are arranged in the round tubes in a segmented mode, the dispersing heat exchange structures comprise core bodies and shells, the core bodies are arranged in the shells, the shells are fixedly connected with the inner walls of the heat exchange tubes, the core bodies each are formed by arraying and combining a plurality of grid pieces, and grid holes are formed among the grid pieces. In case of the design method of the dispersing heat exchange device, the design is carried out according to the distance L between the adjacent dispersing heat exchange structures, the length C of each dispersing heat exchange structure, the diameter D of each heat exchange tube, the fluid circulation area A of each grid hole, and the circumference Z of the fluid circulation of the grid holes. According tothe optimized design method, through optimization of the optimal geometric dimension of the formula, the optimal effect of damping and noise reduction can be achieved under the condition of meeting the normal flowing resistance condition.

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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