Waste heat utilization heat exchange device with changeable dispersed heat exchange structure grid holes

Abstract

The invention provides burning waste heat utilization heat exchange device. The heat exchange device comprises a heat exchange core body, wherein the heat exchange core body is arranged in a waste gasflue, the heat exchange core body comprises round pipes, and the flow direction of the liquid in the round pipes is perpendicular to the flowing direction of the waste gas; a plurality of dispersingheat exchange structures are arranged in the round pipes in a segmented mode, each dispersing heat exchange structure comprises a core body and a shell, the core body is arranged in the shell, and theshell is fixedly connected to the inner wall of a heat exchange pipe; and each core body is formed by arraying and combining a plurality of grid pieces, the grid pieces are connected to form grid holes, and the hydraulic diameters of the grid holes in the different dispersed heat exchange structures are smaller and smaller from the inlet of the round pipe to the outlet of the round pipe. In the rising process, the round pipes are heated continuously, so that the vapor in the vapor-liquid two-phase flow is more and more, due to the fact that the vapor phase in the vapor-liquid two-phase flow is more and more, the heat exchange capacity in the round pipes can be relatively weakened along with the increase of the vapor phase, and the vibration and the noise can also be increased along with the increase of the vapor phase. Therefore, the hydraulic diameters of the grid holes of the adjacent dispersed heat exchange structures needing to be arranged are smaller and smaller.

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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