High-temperature smoke cooling heat exchanger

Abstract

The invention relates to a high-temperature smoke cooling heat exchanger comprising a rack (1); one side of the rack (1) is provided with two air preheaters (2) at front and rear sides, and the other side of the rack (1) is provided with a gas preheater (3); a first smoke outlet (22) of the air preheater (2) at the rear side communicates with a first smoke inlet (21) of the air preheater (2) at the front side through a first smoke channel (4); the air preheater (2) at the front side communicates with the gas preheater (3); and an air outlet (24) of the air preheater (2) at the front side communicates with an air inlet (23) of the air preheater (2) at the rear side through an air channel (6). The high-temperature smoke cooling heat exchanger provided by the invention can be used for not only recycling the temperature of high-temperature smoke, but also heating low-temperature gas to the temperature meeting a production process requirement so that the effects of cooling and saving energy are achieved.

Description

technical field [0001] The invention relates to a high-temperature flue gas cooling heat exchanger, which is mainly used for cooling high-temperature flue gas in industries such as oil refining, petrochemical industry, and metallurgy, and belongs to the technical field of cooling equipment. Background technique [0002] The flue gas temperature at the tail of a non-ferrous metal smelting kiln is generally 700~1000°C. Before entering the kiln tail fan and dust collection device, the flue gas temperature must be cooled to 150~350°C, otherwise the dust collection equipment will be damaged. The straight-through flue gas cooler commonly used at present generally adopts a circular tube structure as the cooling element. During production and use, the smoke and dust are easy to block the cooling element, and the heat exchange effect is poor after a period of use. When the heat exchange element is damaged, maintenance and replacement are also necessary. Very inconvenient. The invent...

AI Technical Summary

Problems solved by technology

However, since the heat exchange unit of the plate cooler adopts a flat tube structure, its compressive strength is low, and it is prone to leakage and deformation, which has potential safety hazards in production. Therefore, it is only suitable for heat exchange between air and flue gas, and cannot meet the requirements of Production requirements for heat exchange; in addition, the temperature of the high-temperature flue gas is still high after passing through a single plate cooler, and the heat of the flue gas is not fully utilized, and direct discharge will have an impact on the environment

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