Partition plate type dust-falling, temperature-adjusting and pressure-stabilizing flue gas pretreatment device and application process

Abstract

The invention discloses a partition plate type dust-falling, temperature-adjusting and pressure-stabilizing flue gas pretreatment device and an application process, which belong to the field of metallurgical green production. The device comprises a dust-falling pressure-stabilizing temperature-adjusting box body, and a flue gas input pipe and a flue gas output pipe which are respectively provided with openings in two side box walls and are fixedly connected, and further comprises a particle dust collecting hopper which is connected to the bottom of the dust-falling pressure-stabilizing temperature-adjusting box body. Two hollow self-flowing type air heat exchange partition plates which are alternately distributed up and down are vertically and fixedly connected in the dust-falling, pressure-stabilizing and temperature-adjusting box body, a flue gas channel is reserved at the upper end of the self-flowing type air heat exchange partition plate close to and facing the flue gas input pipe, and a flue gas channel is reserved at the bottom end of the self-flowing type air heat exchange partition plate close to and facing the flue gas output pipe; the production coarse flue gas can flow in an inverted S shape in the dust-falling, pressure-stabilizing and temperature-adjusting box body, and the heat exchange distance between the production coarse flue gas and cold air indirectly mixed in the dust-falling, pressure-stabilizing and temperature-adjusting box body is increased. The pressure stability of the whole production system is guaranteed in large-scale sintering and pellet production.

Description

technical field [0001] The invention relates to the technical field of metallurgical green production, and more specifically, to a clapboard-type dust-reducing, temperature-regulating, and pressure-stabilizing flue gas pretreatment device and an application process. Background technique [0002] In today's large-scale sintering and pellet production, the exhaust combustion production process is usually adopted, and the flue gas produced by the production combustion contains a large amount of metals, metal oxides, and incompletely burned fuel dust particles; and hydrogen chloride (HCL) produced by combustion , sulfur oxides (SOX), nitrogen oxides (NOX), etc.; the highest flue gas temperature is about 450°C, and the lowest is about 80°C; various fluctuations in the production process are manifested as pressure fluctuations and temperature fluctuations in the production flue gas system. [0003] With the continuous upgrading of green production standards, the new national stand...

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Problems solved by technology

[0007] Aiming at the disadvantages of the existing large-scale sintering and pellet production, the pressure fluctuation and temperature fluctuation of the production flue gas system are not conducive to the stable operation of desulfurization and denitrification, the present invention provides a clapboard-type dust-reducing temperature-regulating and stabilizing flue gas The pretreatment device and application process, the present invention utilizes the natural atmosphere to adjust the temperature of the flue gas, increases the intermixing of cold air, avoids the strong disturbance of the flue gas caused by the direct mixing of cold air, stabilizes the pressure of the flue gas pipeline, and can also be recovered in advance Coarse flue gas and large particle dust are recycled to reduce the amount of desulfurization and denitrification hazardous waste

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