A double-shell composite combustion waste heat utilization heat exchange device

Abstract

The invention provides a double-shell combined combustion waste-heat-utilization heat exchange device. The device comprises a heat exchange core body, shells, a heat exchange core body front supporting body and a heat exchange core body rear supporting body, the heat exchange core body, the front supporting body and the rear supporting body are arranged in a waste gas smoke flue, and the heat exchange core body comprises an outer shell and a plurality of heat exchange pipes. The device is characterized in that the shells comprise the upper shell and the lower shell, the upper shell is located on the upper sides of the heat exchange core body and the supporting bodies, the lower shell is located on the lower sides of the heat exchange core body and the supporting bodies, and the lower shell and the heat exchange body upper shell are fixed to the free edges of the two sides; and the front end faces of the upper shell and the lower shell and the outer side face of a combustion chamber mounting cylinder are fixed and sealed, and flanges are fixed to the rear end faces of the upper shell and the lower shell. According to the heat exchange device, a vertical-double-shell structure is adopted, so that mounting is convenient, and the structure is compact; the heat exchange body upper shell and the heat exchange body lower shell adopt a covering structure on the butt-joint position so that the effect of structural stability reinforcement can be achieved, and an outward square groove is formed in the middle area of a square structure of the upper shell; and meanwhile through holes are formed in baffles arranged at the front end and the rear end of the square structure, so that gathering and discharging of gas in the heat exchange device towards a water outlet pipe are facilitated, and the situation that the heat load of the heat exchange device is increased due to gas accumulation is avoided.

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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