Sintered ore double screw type cooling heat exchange device

Abstract

The invention relates to a sintering heating device, and concretely provides a sintered ore double screw type cooling heat exchange device, comprising an annular cooling heat exchange channel, an air bellow blowing a cooling medium, and wind covers collecting hot exhaust gas, the internal of the annular cooling heat exchange channel is provided with A and B inter-winded screw type sintered ore trolley running tracks, the front half section of the A track is located above the rear half section of the B track, the front half section of the B track is located above the rear half section of the Atrack, the A and B tracks, respectively from an ore inlet and along the half circular cooling heat exchange channel in the sintered ore running direction, is divided into three stereo structural sections, the wind covers at the top of the six stereo structural sections are respectively provided with an exhaust gas outlet, a high temperature section exhaust gas outlet, a middle temperature sectionexhaust gas outlet, and a low temperature section exhaust gas outlet are successively provided from the ore inlet. The sintered ore double screw type cooling heat exchange device is advantaged by capability of effectively improving hot exhaust gas grade, making usable rate of hot exhaust gas reach 100%, reducing temperature fluctuating range of hot exhaust gas, improving heat source stability of a waste heat boiler, and saving occupation area of a cooling machine.

Description

Technical field: [0001] The invention relates to sintering heating equipment, in particular to a sintering ore double-helix cooling heat exchange device for recovering sensible heat of sintering ore, especially increasing the processing capacity of a cooling machine, improving the grade of hot waste gas and the availability of hot waste gas. Background technique: [0002] Sintering is the leading production process of iron ore powder agglomeration and an important part of the entire steel production process. The material handling capacity of the sintering process ranks second in the iron and steel complex, second only to the blast furnace ironmaking, and the energy consumption is also second only to ironmaking and steel rolling, ranking third, generally accounting for 10% of the total energy consumption of iron and steel enterprises ~20%. The energy consumption of sintering process in my country is 20kgce / t higher than that of advanced countries. In the total energy consum...

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Problems solved by technology

[0005] Second: The continuity of the waste heat source is difficult to guarantee, resulting in temperature fluctuations of the waste heat source

Heat source continuity is a necessary condition for efficient recovery of waste heat. During sintering production, due to short-term shutdown of equipment and interruption of sintering, there is no effective control method, resulting in large temperature fluctuations of waste heat source, and the steam turbine generator unit is forced to shut down.

[0006] At present, domestic large-scale iron and steel companies use waste heat boilers to recover sensible heat from sinter to generate steam for power generation, but only recover about 40% to 60% of the high temperature waste heat in the cooling zone, and the recovery rate of waste heat resources is low

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